WO2022048516A1 - 一种广播信号的播放方法、地图生成方法及装置 - Google Patents

一种广播信号的播放方法、地图生成方法及装置 Download PDF

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Publication number
WO2022048516A1
WO2022048516A1 PCT/CN2021/115347 CN2021115347W WO2022048516A1 WO 2022048516 A1 WO2022048516 A1 WO 2022048516A1 CN 2021115347 W CN2021115347 W CN 2021115347W WO 2022048516 A1 WO2022048516 A1 WO 2022048516A1
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WIPO (PCT)
Prior art keywords
broadcast signal
terminal
information
state
received
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Application number
PCT/CN2021/115347
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English (en)
French (fr)
Inventor
苏德润
崔秀帅
张桂成
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21863581.1A priority Critical patent/EP4203346A4/en
Publication of WO2022048516A1 publication Critical patent/WO2022048516A1/zh
Priority to US18/178,112 priority patent/US20230208541A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/76—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
    • H04H60/78—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by source locations or destination locations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/57—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for mobile receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/26—Arrangements for switching distribution systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
    • H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
    • H04H40/54—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving generating subcarriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
    • H04H60/41—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
    • H04H60/42—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas for identifying broadcast areas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/49—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying locations
    • H04H60/53—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying locations of destinations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/68—Systems specially adapted for using specific information, e.g. geographical or meteorological information
    • H04H60/70—Systems specially adapted for using specific information, e.g. geographical or meteorological information using geographical information, e.g. maps, charts or atlases
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
    • H04H20/24—Arrangements for distribution of identical information via broadcast system and non-broadcast system

Definitions

  • the present application relates to the technical fields of communication technology and networked vehicles, and in particular, to a method for broadcasting a broadcast signal, a method and a device for generating a map.
  • Over-the-air broadcasting is generally based on amplitude modulation (AM) and frequency modulation (FM).
  • AM and FM refer to two different modulation methods in radio.
  • the audio signal broadcast on the air is transmitted in the form of an analog signal through the radio broadcast transmitting device set up by the broadcaster.
  • Internet broadcasting uses the network (Internet, wireless cellular network, etc.) as a medium, and transmits audio signals in the form of standard IP data packets on the local area network and wide area network. As long as there is a place where the network signal can be received, you can listen to Internet radio. Sexual restrictions.
  • the signal transmitted by the air broadcast is often caused by the terminal (such as a radio) where the environment is shielded by a shield (such as in the subway, in a shielded building) or the quality difference of the terminal, etc., which often leads to users unable to listen to the wireless broadcast or the effect is very poor.
  • the network may have poor signal quality, which may affect the listening effect, and generally incur extra costs, causing users to switch between over-the-air broadcasts and network broadcasts for the above reasons when listening to radio programs on the terminal.
  • the transmission of the air broadcast and the network broadcast is not synchronized, there may be a problem of lag or missing part of the content after switching, thus reducing the user experience.
  • the present application provides a method for broadcasting a broadcast signal, a method and a device for generating a map, which are used to improve the listening experience of the broadcast.
  • the present application provides a map generation method, which can be executed by a map generation device; the map generation device can be a communication device or a communication device capable of supporting the functions required by the communication device to implement the method, such as a chip system.
  • the map generating apparatus may be a map server.
  • the method may include: receiving a plurality of first pieces of information, each of the first pieces of information including a location location of a terminal, an intensity of a broadcast signal modulated with a first modulation frequency received by the terminal at the location location, and the first information. a modulation frequency; generating a broadcast signal strength layer according to the plurality of first pieces of information, where the broadcast signal strength layer is used to represent the first strength range corresponding to the first strength range of the broadcast signal modulated with the first modulation frequency a coverage area.
  • a broadcast signal strength layer of the broadcast signal corresponding to the first adjustment frequency can be generated by receiving a plurality of first pieces of information, and the broadcast signal strength layer can represent the corresponding relationship between the positioning position and the strength of the broadcast signal, Therefore, during the movement of the terminal to listen to the broadcast, based on the newly added broadcast signal strength layer in the map, the terminal can be instructed to switch to another broadcast signal at a position where the received broadcast signal strength is low, thereby improving the broadcast quality. Listening experience, and based on the newly added broadcast signal strength layer in the map, it is possible to determine in advance the area where the broadcast signal is weak, so that the broadcast signal can be switched in advance to avoid the poor listening effect when the received broadcast signal is too weak. After switching, the user's listening experience is improved.
  • the boundary of the range of the first coverage area is determined according to a plurality of the positioning positions in the plurality of first pieces of information.
  • the positioning position corresponding to the same broadcast signal strength can be determined in the broadcast signal strength layer, thereby determining the boundary of the first coverage area, so that the terminal can better determine the position with lower broadcast signal strength, So that the terminal can better determine the switching timing.
  • the intensity of the broadcast signal received by the terminal at the positioning position is compared with a preset first intensity threshold and obtained by comparing the intensity of the broadcast signal, and the obtained result.
  • a plurality of the positioning positions in the plurality of first pieces of information are used to determine the boundary of the first coverage area.
  • the same or similar broadcast signal strengths can be compared with a preset first strength threshold from the multiple pieces of first information, so that the boundary of the first coverage area can be better determined.
  • the broadcast signal strength layer is further used to represent the second coverage area range corresponding to the second strength range of the broadcast signal modulated with the first modulation frequency.
  • coverage area ranges corresponding to multiple intensity ranges can be set in the map, so that when the terminal switches signals based on the broadcast signal intensity layer, different intensity ranges can be selected to better adapt to the The signal strength layer performs switching signals in various scenarios, improving the applicability of the broadcast signal strength layer.
  • a possible implementation manner is to receive multiple pieces of second information, each of which includes the positioning position of the terminal, the strength of the broadcast signal modulated with the second modulation frequency received by the terminal at the positioning position, and the second modulation frequency; and generating the broadcast signal strength layer according to the plurality of second pieces of information, where the broadcast signal strength layer is further used to represent at least one strength of the broadcast signal modulated with the second modulation frequency At least one coverage area range corresponding to the range.
  • the map can also generate a broadcast signal strength layer corresponding to the broadcast signal of the second modulation frequency based on a plurality of second pieces of information, thereby adapting to more switching scenarios of broadcast signals and improving the applicability of the map.
  • a possible implementation manner preset at least one coverage area corresponding to the at least one intensity range according to the modulation frequency and geographic information of the broadcast signal; at least one coverage area corresponding to the preset at least one intensity range On the basis of the range, a broadcast signal strength layer is generated by training data in the plurality of first pieces of information, wherein the plurality of first pieces of information come from a plurality of terminals.
  • the broadcast signal strength layer can be trained based on the first information collected by multiple terminals, so that a more accurate and credible distribution of broadcast signal strength can be obtained, so that the terminal can better determine that the broadcast signal strength is low position, so that the terminal can better determine the switching timing and improve the listening experience of the terminal.
  • the present application provides a map generation method, which can be executed by a map generation device; the map generation device can be a communication device or a communication device capable of supporting the functions required by the communication device to implement the method, such as a chip system.
  • the map generating device may be a terminal device, a vehicle or a vehicle-mounted device.
  • the method may include: acquiring a first positioning position of the terminal; detecting the strength of a broadcast signal received by the terminal at the first positioning position; sending first information to a server, where the first information includes the first positioning position , the intensity of the broadcast signal received by the terminal at the first positioning position and the modulation frequency of the broadcast signal, and the first information is used to determine the coverage area corresponding to the intensity range of the broadcast signal in the broadcast signal intensity layer Scope.
  • the terminal can send the first information to the map server based on the detected strength of the broadcast signal received at the first positioning position, so that the map server can determine the strength of the broadcast signal based on the received first information
  • the coverage area corresponding to the strength range of the broadcast signal in the layer provides the data basis for the map server to generate the broadcast signal strength layer.
  • the first information before sending the first information to the server, the first information may be determined by comparing the strength of the broadcast signal received by the terminal at the first positioning position with a preset threshold of the strength range.
  • a positioning location is located at the boundary of the coverage area.
  • the terminal compares the intensity of the broadcast signal received at the first positioning location with the preset threshold of the intensity range, it determines that the first information is not reported if it is not near the threshold, and if it is determined to be near the threshold, then The first information is reported, so as to reduce the overhead of the terminal for reporting the first information.
  • the power consumption occupied by the map server for processing the first information can also be reduced, and the efficiency of map generation can be improved.
  • the present application provides a method for playing a broadcast signal, and the method can be executed by a device for playing a broadcast signal; the device for playing a broadcast signal can be a communication device or a communication device capable of supporting the functions required by the communication device to implement the method. , such as system-on-a-chip.
  • the playback device of the broadcast signal may be a terminal device, a vehicle or a vehicle-mounted device. The following description will be given by taking a broadcast signal playing device as a terminal as an example.
  • the method includes: the terminal receives a broadcast signal strength layer from a map server, the broadcast signal strength layer belongs to the map layer, and the broadcast signal strength layer is used to represent the coverage range of the broadcast signal corresponding to the strength level of the broadcast signal ; according to the current positioning position of the terminal, the current motion state of the terminal, the future driving path of the terminal and the broadcast signal strength layer, switch from the first state of only receiving the first broadcast signal at the first moment In the second state of simultaneously receiving the first broadcast signal and the second broadcast signal, wherein the types of the first broadcast signal and the second broadcast signal are different; the terminal is in the first state at a single rate Playing the received first broadcast signal; playing the received first broadcast signal when the terminal is in the second state.
  • the terminal can determine in advance the area where the broadcast signal is weak based on the newly added broadcast signal strength layer in the map, that is, determine that the first moment is the moment when the broadcast signal is about to be weak, so as to enter the second area in advance. state, based on the first broadcast signal and the second broadcast signal received at the same time in the second state, to prepare for switching the broadcast signal, to avoid switching after the received broadcast signal is too weak and the listening effect is poor, which improves the user's listening. experience.
  • the second broadcast signal has a time delay relative to the first broadcast signal, and the terminal plays the first broadcast signal at a slower rate than a single rate when the terminal is in the second state. , the terminal switches from the second state to a third state in which only the second broadcast signal is received at a second moment, where the second moment is the first broadcast signal being played and the second broadcast signal being received. A synchronized moment; when the terminal is in the third state, the second broadcast signal is played at a single rate.
  • the first broadcast signal when the currently played first broadcast signal is slower than the received second broadcast signal, the first broadcast signal can be played at a rate slower than a single rate in the second state, so that the terminal ends in the second state At the same time, the played first broadcast signal and the received broadcast signal can be synchronized, thereby avoiding the problem of possible lag after direct switching, realizing seamless switching of broadcast signals, and improving the listening experience of users.
  • the first broadcast signal has a time delay relative to the second broadcast signal, and when the terminal is in the second state, the terminal plays the first broadcast signal at a single rate and buffers the received signal.
  • the second broadcast signal at this time, the terminal switches from the second state to a third state in which only the second broadcast signal is received at a second moment, and the second moment is the played first broadcast
  • the signal is secondly synchronized with the second broadcast signal that is initially buffered
  • the terminal plays the buffered second broadcast signal at a rate faster than a single rate, and continues to buffer the received The second broadcast signal; the terminal switches from the third state to the fourth state at a third moment, and the third moment is the third synchronization of the buffered second broadcast signal and the played second broadcast signal
  • the received second broadcast signal is played at a single rate.
  • the second broadcast signal when the currently played first broadcast signal is faster than the received second broadcast signal, the second broadcast signal can be buffered in the second state, and when the second state ends, the received second broadcast signal can be synchronized with the currently playing first broadcast signal so that, at the end of the second state, a third state is started, in which the second broadcast signal is played at a faster than single rate to catch up with the received
  • the second broadcast signal that is, at the end of the third state, the played second broadcast signal can be synchronized with the received second broadcast signal, so that in the fourth state, the switching is completed.
  • the method can avoid the problem of missing listening that may occur after direct switching, can realize seamless switching of broadcast signals, and improve the listening experience of users.
  • the present application provides a map generation device, which can be applied to a map server or a chip system of a map server.
  • the map generating apparatus may include: a receiving unit and a processing unit.
  • the receiving unit is configured to receive a plurality of first pieces of information, where each piece of first information includes the location of the terminal, the intensity of the broadcast signal modulated with the first modulation frequency received by the terminal at the location of the location, and the first modulation frequency;
  • the processing unit is configured to generate a broadcast signal strength layer according to the plurality of first pieces of information, where the broadcast signal strength layer is used to represent the first modulation frequency of the broadcast signal modulated with the first modulation frequency.
  • a first coverage area range corresponding to an intensity range.
  • the processing unit is specifically configured to: determine the boundary of the first coverage area according to a plurality of the positioning positions in the plurality of first information.
  • the processing unit is specifically configured to: compare the strength of the broadcast signal received by the terminal at the positioning position in the multiple pieces of first information with a preset first strength threshold respectively The obtained multiple comparison results and the multiple positioning positions in the multiple first information determine the boundary of the first coverage area.
  • the broadcast signal strength layer is further used to represent the second coverage area range corresponding to the second strength range of the broadcast signal modulated with the first modulation frequency.
  • the receiving unit is further configured to receive multiple pieces of second information, each of the second pieces of information includes a positioning position of the terminal, a second modulation frequency received by the terminal at the positioning position The intensity of the modulated broadcast signal and the second modulation frequency;
  • the processing unit is further configured to generate the broadcast signal intensity layer according to the plurality of second pieces of information, and the broadcast signal intensity layer is further used for Indicates at least one coverage area range corresponding to at least one intensity range of the broadcast signal modulated with the second modulation frequency.
  • the processing unit is further configured to preset at least one coverage area range corresponding to the at least one intensity range according to the modulation frequency and geographic information of the broadcast signal; On the basis of at least one coverage area corresponding to the range, a broadcast signal strength layer is generated by training data in the plurality of first pieces of information, where the plurality of first pieces of information come from a plurality of terminals.
  • an embodiment of the present application provides a map generation device, the map generation device can be applied to a map server or a chip system of a map server, and the map generation device includes a processor for implementing the method described in the first aspect above .
  • the apparatus may also include a memory for storing programs and instructions. The memory is coupled to the processor, and when the processor executes the program instructions stored in the memory, the method described in the first aspect above can be implemented.
  • the apparatus may also include an interface circuit for the apparatus to communicate with other devices, for example, the interface circuit may be a transceiver, circuit, bus, module or other type of interface circuit.
  • the map generating device is a map server, or a chip provided in the map server.
  • the transceiver is implemented by, for example, an antenna, a feeder, a codec, etc. in the map server, or, if the map generating device is a chip provided in the map server, the interface circuit is, for example, a communication interface in the chip, and the communication The interface is connected with the radio frequency transceiver component in the map server, so as to realize the sending and receiving of information through the radio frequency transceiver component.
  • the present application provides a map generation apparatus, which can be applied to a terminal device, a vehicle, or a vehicle-mounted device.
  • the map generating apparatus may include: an acquiring unit for acquiring a first positioning position of the terminal; a detecting unit for detecting the strength of a broadcast signal received by the terminal at the first positioning position; a sending unit for sending a message to the server Send first information, where the first information includes the first positioning position, the strength of the broadcast signal received by the terminal at the first positioning position, and the modulation frequency of the broadcast signal, and the first information is used for Determines the coverage area range corresponding to the strength range of the broadcast signal in the broadcast signal strength layer.
  • the apparatus further includes a processing unit configured to compare the intensity of the broadcast signal received by the terminal at the first positioning position with a preset value before the sending unit sends the first information to the server.
  • the comparison of the thresholds of the intensity ranges determines that the first positioning position is located at the boundary of the coverage area range.
  • an embodiment of the present application provides an apparatus for generating a map, and the apparatus for generating a map can be applied to a terminal device, a vehicle, or a vehicle-mounted device.
  • the map generating apparatus includes a processor for implementing the method described in the second aspect above.
  • the apparatus may also include a memory for storing programs and instructions.
  • the memory is coupled to a processor, and when the processor executes the program instructions stored in the memory, the method described in the second aspect above can be implemented.
  • the apparatus may also include an interface circuit for the apparatus to communicate with other devices, for example, the interface circuit may be a transceiver, circuit, bus, module or other type of interface circuit.
  • the map generating apparatus is a terminal device, or a chip provided in the terminal device.
  • the transceiver is implemented by, for example, an antenna, a feeder, a codec, etc. in the terminal device, or, if the map generating device is a chip provided in the terminal device, the interface circuit is, for example, a communication interface in the chip, and the communication The interface is connected with the radio frequency transceiver component in the terminal device, so as to realize the transmission and reception of information through the radio frequency transceiver component.
  • the interface circuit is, for example, a communication interface in the chip, and the communication The interface is connected with the radio frequency transceiver component in the terminal device, so as to realize the transmission and reception of information through the radio frequency transceiver component.
  • the present application provides an apparatus for playing a broadcast signal, which can be applied to a terminal device, a vehicle or a vehicle-mounted device.
  • the broadcast signal playing apparatus may include: a receiving unit and a processing unit.
  • the receiving unit is configured to receive the broadcast signal strength layer from the map server, the broadcast signal strength layer belongs to the map layer, and the broadcast signal strength layer is used to represent the broadcast signal intensity level corresponding to the broadcast signal strength level.
  • the processing unit is configured to, according to the current positioning position of the terminal, the current motion state of the terminal, the future driving path of the terminal, and the broadcast signal strength layer, at the first moment from receiving only the first
  • the first state of the broadcast signal is switched to the second state of simultaneously receiving the first broadcast signal and the second broadcast signal, wherein the types of the first broadcast signal and the second broadcast signal are different; when in the first state , the playing unit plays the received first broadcast signal at a single rate; when in the second state, the playing unit plays the received first broadcast signal.
  • the second broadcast signal has a time delay relative to the first broadcast signal
  • the processing unit is configured to, when in the second state, use the playback unit at a slower speed than the single speed.
  • the first broadcast signal is played at a rate
  • the processing unit is further configured to switch from the second state to a third state in which only the second broadcast signal is received at a second moment, where the second moment is the broadcast signal. The moment when the first broadcast signal is first synchronized with the received second broadcast signal; when in the third state, the second broadcast signal is played at a single rate by the playing unit.
  • the first broadcast signal has a time delay relative to the second broadcast signal
  • the processing unit is configured to play at a single rate through the playback unit when it is in the second state
  • the first broadcast signal and the received second broadcast signal are buffered, and the processing unit is further configured to: switch from the second state to a third state in which only the second broadcast signal is received at a second moment,
  • the second time is the second synchronization time between the played first broadcast signal and the initially buffered second broadcast signal.
  • the playback unit is used to play the buffer at a rate faster than a single rate.
  • the second broadcast signal and continue to buffer the received second broadcast signal; switch from the third state to the fourth state at the third moment, which is the buffered second broadcast signal
  • the signal is thirdly synchronized with the played second broadcast signal, when in the fourth state, the received second broadcast signal is played at a single rate by the playing unit.
  • the present application provides an apparatus for playing a broadcast signal, which can be applied to a terminal device, a vehicle, or a vehicle-mounted device.
  • the apparatus for playing a broadcast signal includes a processor for implementing the method described in the third aspect.
  • the apparatus may also include a memory for storing programs and instructions.
  • the memory is coupled to a processor, and when the processor executes the program instructions stored in the memory, the method described in the third aspect can be implemented.
  • the apparatus may also include an interface circuit for the apparatus to communicate with other devices, for example, the interface circuit may be a transceiver, circuit, bus, module or other type of interface circuit.
  • the apparatus for playing the broadcast signal is an in-vehicle device, or a chip provided in the in-vehicle device.
  • the transceiver is realized by, for example, an antenna, a feeder, a codec, etc. in the in-vehicle equipment, or, if the playback device of the broadcast signal is a chip provided in the in-vehicle equipment, the interface circuit is, for example, a communication interface in the chip, The communication interface is connected with the radio frequency transceiver component in the vehicle-mounted device, so as to realize the transmission and reception of information through the radio frequency transceiver component.
  • a communication system includes the map generation device of the fourth aspect or the fifth aspect, the map generation device of the sixth aspect or the seventh aspect, and may also include the eighth aspect or the first The broadcast signal playback device according to the ninth aspect.
  • a computer storage medium is provided, and instructions are stored in the computer-readable storage medium, which, when executed on a processor, cause the positioning device to perform the first aspect, the second aspect, or the first aspect.
  • a twelfth aspect provides a computer program product comprising instructions, the computer program product having instructions stored therein that, when executed on a processor, cause the positioning device to perform the first aspect, the second aspect, or The method described in any possible implementation manner of the third aspect.
  • FIG. 1a-1b are schematic structural diagrams of an over-the-air broadcast signal transceiver device in the prior art
  • Fig. 2a is the structural representation of the network broadcasting system in the prior art
  • 2b is a schematic structural diagram of a network broadcast receiving end device in the prior art
  • FIG. 3a is a schematic diagram of a broadcast system architecture to which an embodiment of the present application is applied;
  • FIG. 3b is a schematic structural diagram of a multimedia terminal device proposed by an embodiment of the application.
  • 4a-4b are schematic diagrams of a broadcast signal strength layer proposed by an embodiment of the present application.
  • 5a is a flowchart of a map generation method proposed by an embodiment of the present application.
  • FIG. 5b is a schematic diagram of a generation process of a broadcast signal strength layer proposed by an embodiment of the present application.
  • FIG. 6 is a flowchart of a first broadcast signal playing method proposed by an embodiment of the present application.
  • 7a is a flowchart of a second broadcast signal playing method proposed by an embodiment of the application.
  • FIG. 7b is a schematic diagram of an application scenario of the second broadcast signal playing method proposed by the embodiment of the application.
  • FIG. 7c is a schematic diagram of a broadcast signal strength layer used in the second broadcast signal playback method proposed by the embodiment of the present application.
  • 7d is a schematic diagram of a second broadcast signal playing method proposed by an embodiment of the present application.
  • 8a is a flowchart of a third broadcast signal playing method proposed by an embodiment of the present application.
  • 8b is a schematic diagram of an application scenario of a third broadcast signal playing method proposed by an embodiment of the present application.
  • 8c is a schematic diagram of a broadcast signal strength layer used by a third broadcast signal playback method proposed by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a first map generation apparatus proposed by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a second map generation apparatus proposed by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a third map generation apparatus proposed by an embodiment of the application.
  • FIG. 12 is a schematic structural diagram of a fourth map generation apparatus proposed by an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a first broadcast signal playback apparatus proposed in an embodiment of the application.
  • FIG. 14 is a schematic structural diagram of an apparatus for playing a second broadcast signal according to an embodiment of the present application.
  • Terminal devices including devices that provide voice and/or data connectivity to users, for example, may include handheld devices with wireless connectivity, or processing devices connected to wireless modems.
  • the terminal equipment may communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, V2X terminal equipment, machine-to-machine/machine-type communication ( machine-to-machine/machine-type communications, M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station) , remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), or user equipment (user device), etc.
  • IoT Internet of things
  • these may include mobile telephones (or "cellular" telephones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, computer-embedded mobile devices, and the like.
  • mobile telephones or "cellular" telephones
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • constrained devices such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc.
  • it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), and laser scanners.
  • RFID radio frequency identification
  • GPS global positioning system
  • the terminal device may also be a vehicle-mounted device, such as an on-board unit (OBU), which is generally installed on a vehicle.
  • OBU on-board unit
  • Communication with the RSU is possible, for example, by microwave. Microwaves can be used to communicate between the OBU and the RSU as the vehicle passes through the RSU.
  • ETC electronic toll collection
  • the OBU adopts the dedicated short range communication (DSRC) technology to establish a microwave communication link with the RSU. Processes such as vehicle identification or electronic deduction can be realized.
  • the in-vehicle device may also be another device mounted on the vehicle.
  • the various terminal devices described below if located on a vehicle (for example, placed in or installed in a vehicle), can be considered as vehicle-mounted devices, or referred to as vehicle-mounted devices.
  • vehicle-mounted devices include at least a vehicle, an in-vehicle network, and an in-vehicle device.
  • Vehicle-mounted devices include various sensors, GNNS receiving modules, and the like.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • Electronic maps also known as digital maps, are maps that are digitally stored and consulted using computer technology. For example, navigation maps and high-resolution maps.
  • Navigation map which is map data for drivers, is an electronic map (or digital map) that provides road-level navigation functions, and has the functions of map display, location positioning, and road guidance. Usually the accuracy reaches the meter level.
  • High-precision map is map data for autonomous vehicles (including lanes, roads, traffic signs, traffic lights, positioning layers, etc.), is a kind of high-precision positioning function, road-level and lane-level planning and electronic map of the guide function. The accuracy of high-precision maps can reach the centimeter level.
  • the electronic map can be stored in a map server, or in a vehicle-mounted device or a roadside device, which is not limited here.
  • a map server that stores high-precision maps can transmit these target locations (or object locations) to vehicles with automatic driving or assisted driving functions ("ego-car"), which can improve the vehicle's safe and smooth autonomous driving experience.
  • ego-car automatic driving or assisted driving functions
  • ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority or priority of multiple objects. Importance.
  • the first road and the second road are only for distinguishing different roads, and do not indicate the difference in priority or importance of the two roads.
  • Radio is one of the most frequently used services by users while driving.
  • air radio is air radio
  • Internet-based network radio is another main signal source for car radios.
  • Fig. 1a exemplarily shows a schematic diagram of a signal transmitting end of over-the-air broadcast
  • Fig. 1b exemplarily shows a schematic diagram of a signal receiving end of over-the-air broadcast.
  • the sound signal is converted into a low-frequency current, the low-frequency current is subjected to signal amplification processing by a sound amplifier, and a modulated wave is obtained through modulation processing (modulation processing is to attach the sound signal to the The process of high-energy carrier), and then amplified by a high-frequency amplifier, and finally transmitted through the antenna.
  • modulation processing is to attach the sound signal to the The process of high-energy carrier
  • the real-time information of the air broadcast is good, and users do not need to pay extra; however, the FM signal is greatly affected by buildings or terrain (such as tunnels, underground parking lots, remote mountain areas, etc., where the signal is poor).
  • the wireless broadcast signal is received through the antenna, the signal is amplified by the sound amplifier, the FM broadcast signal is demodulated by the tuner, the detection processing by the detector, and then the low frequency The amplifier converts the signal into sound waves, which are ultimately played through the speakers.
  • Fig. 2a exemplarily shows a schematic diagram of a signal transmitting end of an Internet radio station
  • Fig. 2b exemplarily shows a schematic diagram of a signal receiving end of the Internet radio station.
  • the Internet radio can be implemented by using an IP network broadcasting system.
  • the IP network broadcasting system is a set of broadcasting systems based on network transmission.
  • the communication protocol adopts the TCP/IP network protocol, and uses the network (such as local area network or wide area network) to communicate and transmit broadcast audio signals.
  • the working principle of IP network broadcasting system generally includes two aspects: first: adopt TCP/IP network protocol, use network to communicate and transmit broadcast audio signal; second: digital-to-analog conversion, first convert analog broadcast audio signal
  • the digital audio signal is compressed into data packets that can be transmitted on the network, and then transmitted to the destination area through the network.
  • the decoder at the receiving end receives the network data packets, and then converts the digital audio signal into an analog audio signal and outputs it to the power amplifier device.
  • the Internet radio can rely on the wide coverage of the mobile network, the coverage area is wide and the signal is stable. However, the broadcast content of Internet radio stations is delayed and limited by network bandwidth and speed. In addition, listening to Internet radio broadcasts requires payment of mobile network traffic charges.
  • a single broadcast source has its own advantages and disadvantages. If the advantages of the two sources can be integrated, and the FM signal strength and network signal strength can be monitored in real time, different sources can be used in different areas to complete the communication between FM and network broadcast sources. Switch to provide users with a better radio listening experience. For example, you can receive FM signals and listen to the radio in an area where the FM signal is stable. The radio application monitors the FM signal strength in real time. When the vehicle enters a special area such as a tunnel, the FM signal strength becomes weaker. When the FM signal strength is lower than a certain threshold and the Internet radio signal strength is stable, the radio application automatically switches the signal source to Internet radio. .
  • the radio application When the vehicle leaves the special area, after the radio application detects that the FM signal strength is higher than the strength threshold, it switches the signal source from Internet radio to FM again.
  • the monitoring of the FM signal changes from strong to weak or weak to strong, a certain detection period is required.
  • the broadcast quality that the user listens to may be poor due to the instability of the FM signal, and the audio is stuck or blurred. And other issues.
  • FM is "faster" than Internet radio
  • when switching directly from FM signal to Internet radio signal the user will listen to a broadcast repeatedly; when switching directly from Internet radio signal to FM signal, Users will miss a broadcast.
  • the method of hard switching has the problem of audio jumping, which affects the listening effect.
  • the present application provides a broadcast signal playback method based on a map layer, which can ensure that the audio quality of the user listening is stable and continuous during the source switching process, without the need for the user to manually switch, and improve the effect of the user listening to the broadcast.
  • the method for constructing a map and playing a broadcast signal provided by the embodiments of the present application can be used in a connected car system. Vehicles in the connected vehicle system can use traditional maps and high-precision maps to achieve radio listening services.
  • the broadcast listening service described in the embodiments of the present application may also be implemented in the business process of automatic driving and assisted driving.
  • the method for constructing a map and playing a broadcast signal can also be applied to the communication (vehicle to x, V2X) business between vehicles and other devices, such as vehicle to vehicle (V2V), vehicle-to-vehicle communication (vehicle to installation, V2I), etc., which are not limited here.
  • V2V vehicle to vehicle
  • V2I vehicle-to-vehicle communication
  • V2I vehicle to installation
  • the embodiments of the present application can be applied to the system architecture shown in FIG. 3a.
  • FIG. 3a a schematic diagram of the architecture of a possible communication system to which the embodiments of the present application are applied.
  • the communication system includes: terminal equipment 101, network equipment 102, access equipment 105, streaming media server 103 (or IP network broadcast server), radio broadcast signal transmitter 104, map server 106, (may include map server and positioning server, etc.) .
  • the radio broadcast signal transmitter 104 may modulate the audio signal provided by the radio signal source into a radio broadcast signal for transmission.
  • the streaming media server 103 (or IP network broadcast server) can convert the radio station audio signal (analog signal) provided by the radio station signal source into a digital audio signal, and transmit it through the network.
  • the streaming media server 103 may be a device or a streaming media server system composed of a group of devices, so as to realize the above functions.
  • the terminal device 101 has the function of receiving and playing the air broadcast signal. In the air broadcast working mode, the terminal can receive the radio broadcast signal sent by the radio broadcast signal transmitter and play it. audio digital signal and play it. That is, it has a radio function, and also has a network signal (such as a cellular network signal, a local area network signal) receiving and processing functions (such as a player function).
  • FIG. 3a is only a schematic diagram of the architecture of the communication system.
  • the number of network devices 102, the number of access devices 105, and the number of terminal devices 101 in the communication system are not limited, and the embodiment of the present application does not limit the number of
  • the applicable communication system may also include other devices, such as core network devices, wireless relay devices, and wireless backhaul devices.
  • the network device 102 is a special core network device, whether the network device 102 belongs to the core network does not affect the implementation of the embodiment of the present application, which is not limited in the embodiment of the present application.
  • FIG. 1 is only a schematic diagram of the architecture of the communication system.
  • the number of network devices 102, the number of access devices 105, and the number of terminal devices 101 in the communication system are not limited, and the embodiment of the present application does not limit the number of
  • the network device 102 is a special core network device, whether the network device 102 belongs to the core network does not affect the implementation of the embodiment of the present application, which is not limited in the
  • the terminal device 101 can be connected to the access device 105 wirelessly, and establishes a communication link with the network device 102 through the access device 105 .
  • the terminal device 101 may be connected to the access device 105 in a wireless manner, and a communication connection between the terminal devices 101 is established through the access device 105 .
  • the terminal device 101 may also establish a communication connection of the terminal device 101 in a wired manner, which is not limited herein.
  • the quantitative relationship between various devices is not limited. For example, there may be multiple terminal devices communicating with the same access device, and multiple access devices may also communicate with the same network device. communicate, etc.
  • the communication systems applicable to the above system architecture include but are not limited to: Time Division Duplexing-Long Term Evolution (TDD LTE), Frequency Division Duplexing-Long Term Evolution (FDD LTE) , Long Term Evolution-Advanced (LTE-A), and other evolved various wireless communication systems, such as 5G NR communication systems, or various wireless communication systems for evolution.
  • the access device 105 may be a device capable of communicating with a terminal device, for example, the access device may be any device with a wireless transceiver function.
  • any information transmission between the terminal device 101 and the network device 102 includes the meaning that the terminal device 101 and the network device 102 realize the information transmission by means of the access device 105.
  • the terminal device 101 is a device with a wireless transceiver function, and the terminal device 101 can send a request to the network device 102 and obtain data from the network device 102 .
  • the terminal device 101 realizes the positioning function through the map module, such as an intelligent terminal such as an unmanned vehicle and a robot, or a vehicle-mounted terminal for realizing the unmanned driving function, and may also be a mobile phone, a tablet computer, a vehicle-mounted navigation terminal, and the like.
  • the map server 106 may be a single server with a large storage space, a server cluster composed of multiple servers, or a cloud server with a large storage space.
  • Map servers are usually deployed in one or more fixed locations. As shown in FIG. 3a, there is a dotted line connection between the map server and the network device 102, indicating that the map server and the network device 102 can perform data interaction through the core network.
  • Map data can be stored in the map server. Since the storage space of the map server is large enough, map data within a large coverage area can be stored.
  • the map in the map server may include multiple regions, and each region has a corresponding identifier.
  • the map can be divided into multiple areas according to the division of administrative areas (such as districts and counties). In this case, the name of each district and county can be used as the identification of the area.
  • the map may be divided into multiple regular areas in units of preset area areas. In the present application, it can also be divided according to the coverage area of the radio stations. There are various categories of radio stations, such as national stations, provincial stations, and urban stations, which respectively cover different geographical areas. For example, rasterize the map into multiple regular areas in units of 900 square meters, and set corresponding identifiers for each area. It can be understood that the divided regions may also have other shapes, which are not limited in this embodiment of the present application.
  • the map data stored by the map server also includes map data with a broadcast signal layer.
  • the broadcast signal layer may be a layer set based on different frequency points, or a layer set based on one frequency band. , which is not limited here.
  • the map data in the broadcast signal layer can also be divided according to regions, which will be described in detail below, and will not be repeated here.
  • an example of a multimedia system structure diagram corresponding to the vehicle may include a user interface, a map module, a positioning system, a broadcast system, a sensor module, and the like.
  • the broadcast system may include a broadcast signal transceiver module, a media processing module, an audio output module, a network module, a processing module, and the like.
  • the broadcast signal transceiver module can be used to receive FM broadcast data, detect FM broadcast signals and other functions, and can also be used to receive network broadcast data.
  • the media processing module can process the media stream of the broadcast signal, complete the buffering of the broadcast signal, and compare the voiceprint of the audio data in the broadcast signal to determine the audio content played in different broadcast signals.
  • the audio output module is used to play the audio stream data buffered by the media processing module for the user.
  • the network module is used to monitor the strength of the mobile network signal, so as to determine whether to enter the coverage of the mobile network, and to determine whether the network broadcast data can be received.
  • the sensor module is used to collect the driving information of the vehicle, so as to determine the speed of the vehicle, the current driving state of the vehicle, and the road conditions of the vehicle.
  • the processing module is used to make decision on the switching of the broadcast signal.
  • the processing module may be integrated with other processing modules of the terminal, or may be a processing module independently set for the broadcasting system, which is not limited herein. The specific processing process will be described in detail later.
  • the terminal device 101 may be a non-vehicle terminal device such as a mobile phone, and the terminal device 101 may include a user interface, a map module, and a broadcasting system.
  • the terminal device 101 may include off-board terminal devices such as mobile phones, and on-board terminal devices of the vehicle. It is installed on non-vehicle terminal equipment such as mobile phones, and the broadcast module can be installed on the vehicle-mounted terminal equipment of the vehicle.
  • the map module may be provided on the vehicle-mounted terminal device, and the broadcast module may be provided on the non-vehicle-mounted terminal device.
  • the map module and the broadcast module can establish a communication link with the processor of the terminal device 101, so that the processor can receive the map data of the map module and the broadcast signal data of the broadcast module, determine whether to switch the type of the broadcast signal, and control the broadcast module to Switching of types of broadcast signals is realized.
  • the user interface can realize the information interaction between the multimedia system and the user. For example, when the user needs to listen to the radio during travel, the multimedia system will pop up a display interface on the user interface to prompt the user to input the radio station to listen to in the user interface, so that in response to the operation of the radio station selected by the user, the broadcast The signal of the radio station is played.
  • the user interface may further include a setting interface for the type of the broadcast signal, so that the user can set the type of the broadcast signal.
  • the type of broadcast signal may include FM broadcast or Internet broadcast.
  • the setting interface of the type of broadcast signal can also set the scene of the type of broadcast signal.
  • the available network traffic of the terminal satisfies the traffic required by the network broadcast, and in this case, it can be set to listen to the broadcast based on either the type of the FM broadcast signal or the type of the network broadcast signal, so that the terminal determines the current
  • the broadcast signal is a good FM broadcast signal
  • choose to play the FM broadcast and when it is determined that the quality of the FM broadcast signal is poor and the network broadcast signal is good, choose to play the network broadcast.
  • the terminal In scenario 2, if the network traffic of the terminal is insufficient, or the terminal is in a low power consumption state, it can be switched to listen to the broadcast only through the type of FM broadcast signal.
  • the terminal In the third scenario, for example, the terminal is located in an area with poor FM signals, and can switch to listen to the broadcast based on the type of the network broadcast signal only.
  • the user interface can also display prompt information of the vehicle, for example, the type of broadcast signal currently played by the multimedia system can also be displayed on the user interface according to the user's needs. For another example, based on the user's setting of the network broadcast traffic, when the user's network traffic meets a preset threshold, the terminal may display prompt information for the user on the user interface, so that the user can determine whether to switch the network broadcast mode to FM broadcast. mode.
  • the positioning system which can be a GPS system, a Beidou system or other positioning systems, can be used to estimate the geographic location of the terminal device, and can also be used to receive the location information of the terminal device sent by the positioning server.
  • the positioning module may be provided on a car, or the positioning module is an in-vehicle device.
  • the positioning terminal may be set on the roof of the vehicle, or may be set at other positions that need to be positioned.
  • the positioning module may be provided on the non-vehicle device such as a mobile phone.
  • the positioning module on the terminal device 101 can send a positioning request to the positioning server, and receive the position information of the positioning module returned by the positioning server.
  • the location information of the terminal device acquired by the map module may be determined by the terminal device according to a positioning system.
  • the positioning system can determine the fixed position of the terminal device through the GNSS positioning method.
  • the positioning system can also include the positioning network element in the core network.
  • the positioning network element can be the service capability exposure in the core network. function, SCEF) network element, and/or, positioning server.
  • SCEF network element may acquire the location information of the terminal device 101 from the location server.
  • the positioning server may adopt one of the positioning method based on the cell ID (Cell ID), the positioning method based on the time difference of arrival (TDOA), the positioning method based on the angle of arrival (AOA), etc.
  • the location server may be an enhanced serving mobile location center (enhanced serving mobile location center, E-SMLC) network element, and/or a gateway mobile location center (Gateway Mobile Location Center), or one or more devices with similar functions
  • E-SMLC enhanced serving mobile location center
  • gateway mobile location center Gateway Mobile Location Center
  • network elements which are not limited in this embodiment of the present application. It should be understood that, in this embodiment of the present application, the positioning server and the network device 102 may belong to the same physical device, or may respectively belong to different physical devices.
  • the map module can store navigation map data. Compared with the high-precision map, the navigation map only provides road-level navigation information. Navigation maps can provide users with navigation information to meet the navigation needs of driving routes. For example, a navigation map can provide navigation information such as how many lanes the current road has, speed limit information, turn information, and route planning. In this embodiment of the present application, the navigation map may further include a broadcast signal strength layer, which is used to provide strength information of broadcast signals that can be received under the current geographic location.
  • a broadcast signal strength layer which is used to provide strength information of broadcast signals that can be received under the current geographic location.
  • the map module can also be used to store lane-level road information of high-precision maps.
  • High-precision maps can be stored in the form of map files.
  • the map files of high-precision maps mainly include geometric information and attribute information.
  • the geometric information is the spatial coordinates of the lane information, that is, the location of the lane information.
  • the attribute information can be determined based on the attributes of the layer. For example, if the layer of the map is a lane layer, the attribute information is the information of the lane information attribute, such as whether the current lane is a main road lane or an auxiliary road lane; whether this lane is a straight-through lane, a right-turn lane, a left-turn lane or other lanes Wait. If the layer of the map is a broadcast signal layer, the attribute information is the strength information of the broadcast signal.
  • the map module can also be used to receive map data sent by the map server.
  • the terminal device 101 may have a broadcast application or a map application installed, so that the terminal device 101 can communicate with the back-end map server through the Internet through the broadcast application or map application to obtain map data.
  • map data For example, FM signal strength layer information.
  • the map data in the map module may also be updated periodically, which is not limited here.
  • the way of updating the map can also be performed by the terminal or the map server. For example, by updating the map server, the intensity information of the broadcast signal collected by the terminal can be sent to the map server, and the map server can determine the range of the latest broadcast signal intensity.
  • the map server can actively send the updated map to the terminal device, or can return the map corresponding to the updated broadcast signal strength range according to the query request sent by the terminal device.
  • the map data of the corresponding area may be sent during the process of listening to the broadcast to save the map data that the terminal device 101 needs to store, or the map data of multiple areas may be pre-delivered for the map server.
  • the way of updating can also be to update the map data in the map module according to the needs of updating the map data.
  • a sensor module which may include several sensors that sense information about the environment surrounding the vehicle.
  • sensor systems may include positioning systems, inertial measurement units (IMUs), radars, laser rangefinders, and cameras.
  • IMU inertial measurement units
  • the IMU is used to sense position and orientation changes of the vehicle based on inertial acceleration.
  • the IMU may be a combination of an accelerometer and a gyroscope.
  • Radar may utilize radio signals to sense objects within the vehicle's surroundings.
  • radar may be used to sense the speed and/or heading of objects.
  • Laser rangefinders use laser light to sense objects in the environment in which the vehicle is located.
  • a laser rangefinder may include one or more laser sources, a laser scanner, and one or more detectors, among other system components.
  • the camera may be used to capture multiple images of the vehicle's surroundings.
  • the camera can be a still camera or a video camera.
  • the vehicle may also include a computer vision system operable to process and analyze the images captured by the cameras in order to identify objects and/or features in the environment surrounding the vehicle.
  • the objects and/or features may include traffic signals, road boundaries and obstacles.
  • Computer vision systems can use object recognition algorithms, Structure from Motion (SFM) algorithms, video tracking, and other computer vision techniques.
  • a computer vision system may be used to map the environment, track objects, estimate the speed of objects, and the like.
  • the map designed in the embodiment of the present application is based on the traditional map, and a broadcast signal strength layer is added to represent the broadcast signal strength information at different locations.
  • a possible implementation method can use different colors or brightness to represent the broadcast signal strength value of the corresponding location.
  • the dots in the figure correspond to the geographic location of the map, and different grays can be used on the dots.
  • the degree indicates the corresponding broadcast signal strength value. The darker the color, the stronger the signal strength, and the lighter the color, the weaker the signal strength.
  • the broadcast signal strength information is illustrated in Fig. 4b in a manner similar to the contour lines in the topographic map.
  • the broadcast signal strength layer is used to represent the first coverage area range corresponding to the first strength range of the broadcast signal modulated with the first modulation frequency.
  • the broadcast signal strength layer is further used to represent a second coverage area range corresponding to a second strength range of the broadcast signal modulated with the first modulation frequency.
  • the broadcast signal strength layer is further used to represent a third coverage area range corresponding to a third strength range of the broadcast signal modulated with a second modulation frequency different from the first modulation frequency.
  • a closed irregular curve is used to represent the geographical range boundary corresponding to a certain broadcast signal strength range.
  • curve I represents the geographical range boundary of area A. Within area A, the FM broadcast signal strength is greater than the first threshold. , outside the area A, the FM light signal strength is less than the first threshold. On curve I, the FM broadcast signal strength is equal to the first threshold. Within the area A, the terminal can receive a better FM broadcast signal, that is, the listening quality is better.
  • Curve II represents the geographic range boundary of area C, within area C, the FM broadcast signal strength is greater than the second threshold, and outside area C, the FM broadcast signal strength is less than the second threshold. On curve II, the FM broadcast signal strength is equal to the second threshold.
  • Curve III represents the geographic range boundary formed by area D and area A. Within area D, the FM broadcast signal strength is greater than the third threshold, and outside area D, the FM broadcast signal strength is less than the third threshold. On curve III, the FM broadcast signal strength is equal to the third threshold. The first threshold is greater than the third threshold. That is, in the area D, the strength of the FM broadcast signal received by the terminal is lower than that in the area A, and the listening quality is degraded. In Fig. 4b, the area B formed by the dotted line represents the partial area where the FM broadcast signal is lower than the third threshold and the second threshold.
  • the strength of the FM broadcast signal is weak, it is difficult to listen to the FM broadcast signal, or the listening quality is poor.
  • a gradient line can also be added (eg, the arrow in FIG. 4b, indicating that the FM broadcast signal strength changes from strong to weak).
  • the broadcast signal strength layer provides a reference for the timing of switching the broadcast signal source when the terminal is listening to the broadcast. For example, the vehicle is about to enter or leave an area with a weak FM signal.
  • a typical scenario where the FM broadcast signal changes from strong to weak is when a mobile terminal enters a tunnel or indoors.
  • Step 501 The server performs initialization of the broadcast signal strength layer.
  • the coverage area range corresponding to the intensity range of the broadcast signal under at least one modulation frequency is initially set, and the preset coverage area range corresponding to the intensity range of each broadcast signal is determined.
  • the boundary of the preset coverage area may be divided according to geographic information.
  • the coverage area boundary may be preset according to administrative division.
  • the outer boundary may be divided according to the coverage area of the broadcasting station.
  • radio stations such as national stations, provincial stations, and urban stations, which cover different geographical areas. If it is a national station or a provincial station, directly set the border of the preset coverage area to the national border and the provincial border.
  • the boundary is set as a circular curve with the city center as the center and the city's average radius as the radius.
  • the boundary of the preset coverage area range may be set according to the attributes of the area, such as information such as tunnels and indoor areas.
  • the known FM signals in the area such as tunnels, underground parking lots, buildings, etc., cover weak areas, and are pre-marked as preset coverage areas corresponding to weaker intensity ranges.
  • it may also be the boundary of the broadcast signal strength range set according to other methods, which is not limited here.
  • Step 502 The terminal determines the first information.
  • the first information may include the positioning position of the terminal, the strength of the broadcast signal modulated with the first modulation frequency and the first modulation frequency received by the terminal at the positioning position.
  • the first information recorded by the terminal may include but not limited to the following:
  • the detected broadcast signal strength For example, signal strength on an FM radio station band, or signal strength on an Internet radio band.
  • FM radio frequency band information or Internet radio frequency band information.
  • the band where the FM radio station signal is located or the frequency point of the Internet broadcast signal, the IP address of the streaming media server, etc.;
  • the first positioning position of the terminal For example, when the terminal measures the broadcast signal strength, the location information of the location where the terminal is located may be longitude and latitude information, cell identification information of a cell, or other information that can express the location of the terminal. This information can be obtained and reported through the global positioning system (Global Positioning System, GPS) positioning function of the terminal, and the terminal can also report the identity of the cell where it is located.
  • the server can query the corresponding location information according to the location information reported by the terminal. (For example, latitude and longitude or cell identifier) and the corresponding relationship with the city, to obtain the region or city where the terminal is located.
  • the city where the terminal is located can be used as the basis for determining the strength of the broadcast signal in the broadcast signal layer.
  • the motion state information of the terminal within the set time period before and after measuring the strength of the broadcast signal For example, information such as the movement speed of the terminal within 5 minutes before and after the measurement of the broadcast signal strength.
  • the motion state information can be obtained through sensors provided on the vehicle.
  • the terminal sets environmental information for a long period of time before and after measuring the strength of the broadcast signal. For example, information such as weather conditions within a period of time before and after the measurement of the broadcast signal strength occurs.
  • the terminal device may determine the first information when the positioning position changes, or when the intensity of the broadcast signal changes, or when the modulation frequency of the broadcast signal changes.
  • Scenarios a1 to a3 are used as examples to illustrate the scenarios for determining the first information below.
  • the terminal device continues to receive broadcast signals during the moving process. At this time, the change in the positioning position of the terminal device can be greater than the preset distance. a message.
  • the first information can be sent to the map server, so that the map server obtains the intensity distribution of the broadcast signal at different locations.
  • the modulation frequency of the broadcast signal changes, for example, in response to the user switching the broadcast station channel, when the terminal device determines that the positioning position changes, Send the first information to the map server.
  • the first information is reported to the map server only when the strength of the broadcast signal changes and the positioning position of the terminal also changes.
  • the terminal device continues to receive the broadcast signal, and when it is determined that the intensity of the broadcast signal changes from strong to weak or from weak to strong, it sends the first information to the map server. Specifically, the terminal device may send the first information to the map server according to when the change in the intensity of the broadcast signal is greater than a preset threshold.
  • the positioning position of the terminal device and the modulation frequency of the broadcast signal do not change, but only the intensity of the broadcast signal changes.
  • the first information reported by the terminal device may include the changed broadcast signal intensity. related information, and may also include related information of the broadcast signal strength before the change.
  • the terminal device receives the first broadcast signal of the first modulation frequency at the first positioning position, the strength value of the first broadcast signal measured by the terminal device at the first moment is the first strength value, and the measurement at the second moment is the first strength value.
  • the strength value to the first broadcast signal is the second strength value.
  • the terminal device can report both the first intensity value measured at the first moment and the second intensity value measured at the second moment, so that the map server can obtain the broadcast signal strength corresponding to the same positioning position at different times.
  • the terminal device can report to the map as the first information based on the information about the strength of the broadcast signal measured after the change. server.
  • the information related to the broadcast signal strength measured at the last moment before the change may also be reported to the map server as the first information.
  • the terminal device receives the first broadcast signal of the first modulation frequency at the first positioning position (eg, position 4010), and the intensity value of the first broadcast signal measured by the terminal device at the first moment is the first intensity value, the terminal device has experienced the first period of time in the process of moving from the first positioning position (time 1) to the second positioning position (eg, position 4020, time 2), and the measured first broadcast signal is The intensity value is within the first intensity range. Within the first intensity range, it can be considered that the intensity range of the broadcast signal does not change much, and it may not be reported to the map server.
  • the terminal device When the terminal device moves from the second positioning position (time 2) to the third positioning position (eg, position 4030, time 3), receives the first broadcast signal of the first modulation frequency, and measures the strength of the first broadcast signal as the first broadcast signal. Three intensity values. Taking the terminal device determining that the broadcast signal strength increases as an example, if the terminal device determines that the difference between the third strength value and the maximum value of the first strength range is greater than the first preset threshold, the correlation between the broadcast signal strength measured at time 3 can be determined. The information, as the first information, is reported to the map server.
  • the broadcast signal measured at time 3 can be The information related to the signal strength is reported to the map server as the first information.
  • the terminal may also correspond to the last moment of the first period (for example, moment 2) to the first
  • the relevant information of the broadcast signal strength of the second positioning position is reported to the map server as the first information.
  • the terminal device determines that the modulation frequency of the broadcast signal has changed, and reports the first information to the map server.
  • the terminal device can obtain the positioning position of the terminal after switching the modulation frequency, and measure the broadcast signal after switching the modulation frequency, thereby determining the strength of the broadcast signal. For example, in the case of switching from the first modulation frequency to the second modulation frequency, the strength of the broadcast signal of the second modulation frequency is measured. At the same time, the positioning position of the terminal after switching the second modulation frequency can also be determined, and then the first information can be determined.
  • Step 503 The terminal sends the first information to the server.
  • the terminal device may send the first information to the map server when determining the first information.
  • the first information may be sent to the map server in a crowdsourcing mode.
  • the terminal may also save the first information determined each time locally in the terminal, and report it according to a set period or time or other reporting strategies (for example, when the network performance is good, or When the terminal is in an idle state, it will be reported to avoid affecting the performance of the terminal to perform other events), and the relevant information of the saved broadcast signal transmission changes will be reported to the server through the network at an appropriate time.
  • a set period or time or other reporting strategies for example, when the network performance is good, or When the terminal is in an idle state, it will be reported to avoid affecting the performance of the terminal to perform other events
  • Step 504 After receiving the intensity data and the location data, the cloud service performs training on a plurality of pieces of first information to determine the coverage area range corresponding to the intensity range of the broadcast signal.
  • the multiple pieces of first information may be multiple pieces of first information from one terminal, and may also come from multiple terminals, which is not limited herein.
  • the training method can be online training or offline training, which is not limited here.
  • the training frequency may be determined according to the quantity of the received first information, or may be determined according to a preset time.
  • the training process can include:
  • Step 5041 Determine training data.
  • the training can be divided into regions according to the preset coverage area.
  • the coverage area range may be at least one coverage area range corresponding to the intensity range of one broadcast signal, or may be at least one coverage area range corresponding to the intensity ranges of multiple broadcast signals.
  • the first information within the preset coverage area may be determined according to the positioning position in the first information, as training data within the preset coverage area.
  • the training may be divided into time periods according to the time when the broadcast signal strength is measured in the first information.
  • the training data may be determined based on the actual situation of the training data, which is not limited herein.
  • the measurement accuracy may include the measurement accuracy of the positioning position, and may also include the measurement accuracy of the strength of the broadcast signal, which is not limited here
  • Priority is determined for the plurality of first messages, thereby screening the plurality of first messages. For example, low, medium and high priorities may be determined according to the measurement accuracy of the first information reported by the terminal, and the first information with high priority is preferentially used as training data for training.
  • Step 5042 Determine, according to the training data, the coverage area ranges corresponding to the intensity ranges of different broadcast signals.
  • the boundary of the range of the first coverage area may be determined according to a plurality of the positioning positions in the plurality of first pieces of information.
  • multiple pieces of first information corresponding to the strength of the broadcast signal in the training data within the first strength range may be used as the boundary of the first coverage area for determining the first strength range of the broadcast signal.
  • the boundary of the first coverage area is set to 25db, then The boundary of the broadcast signal strength of 25db can be determined according to the positioning positions corresponding to the 20 training data.
  • the vehicle corresponding to the circular icon in the figure is the vehicle reporting the first information, and the vehicle corresponding to the rectangular icon in the figure is the first information reported by vehicles that do not report the first information).
  • the boundary of the first coverage area can be determined according to 30 positioning positions in the 30 training data, and according to the remaining 70 training data, it can be determined that the intensity value of the 70 broadcast signals is less than
  • the 24 training data of the first intensity threshold and the 46 training data greater than the first intensity threshold are used to correct the boundary of the first coverage area. As shown in (c) of FIG. 5b, it may be the boundary of the first coverage area after training based on the training data shown in (b) of FIG. 5b.
  • each of the second information includes the positioning position of the terminal, the strength of the broadcast signal modulated with the second modulation frequency received by the terminal at the positioning position, and the second modulation frequency.
  • the broadcast signal intensity layer can be used to represent at least one coverage area corresponding to at least one intensity range of the broadcast signal modulated with the first modulation frequency, and can also be used to represent the broadcast signal modulated with the second modulation frequency At least one coverage area range corresponding to at least one intensity range of .
  • the terminal can collect information such as positioning position and broadcast signal strength, and send it to the cloud server, and the cloud server can determine the switching of the broadcast signal; or the terminal can determine the switching of the broadcast signal.
  • the following takes the terminal determining the switching of the broadcast signal as an example for description.
  • the main process may include the following steps:
  • Step 601 The terminal receives the broadcast signal strength layer from the server.
  • the broadcast signal strength layer belongs to a map layer, and the broadcast signal strength layer is used to represent the coverage of the broadcast signal corresponding to the strength level of the broadcast signal.
  • Step 602 Determine the first moment according to the current positioning position of the terminal, the current motion state of the terminal, the future driving path of the terminal, and the broadcast signal strength layer.
  • the terminal plays the received first broadcast signal at a single rate when the terminal is in the first state.
  • the terminal can be considered to be in the stable area of the FM signal, and the FM signal received by the terminal can normally play the received first broadcast signal at a speed of 1.0 times through the player of the terminal. 's audio.
  • Step 603 At the first moment, the terminal switches from the first state of receiving only the first broadcast signal to the second state of simultaneously receiving the first broadcast signal and the second broadcast signal. Wherein, the types of the first broadcast signal and the second broadcast signal are different.
  • the current motion state of the terminal may include information such as the movement direction of the terminal, the movement speed or acceleration of the terminal, and the like. Therefore, the terminal can determine the future travel path of the terminal according to the current positioning position of the terminal and the current motion state of the terminal. Alternatively, the terminal may also obtain the future travel path of the terminal based on the travel path planned for the terminal by the navigation map, which is not limited herein.
  • the current positioning position of the terminal is position 710
  • the current motion state of the terminal is straight-line driving
  • the future driving path of the terminal is the driving path 700 shown by the dotted line.
  • the movement information such as the moving speed and acceleration of the terminal in the current movement state can predict the moment when the terminal reaches any position on the future travel path 700 .
  • Step 604 When the terminal is in the second state, the terminal receives the first broadcast signal and the second broadcast signal.
  • the terminal when the terminal is in the second state, it can play the received first broadcast signal.
  • the FM signal source is an analog signal directly transmitted by the transmitting tower, while the network broadcast signal source is forwarded and transmitted through the mobile network. Therefore, the broadcast contents of the first broadcast signal and the second broadcast signal are not completely synchronized. If the first broadcast signal is directly switched to the second broadcast signal, the problem of missed listening or repeated listening will occur, which seriously affects the user experience.
  • the terminal may insert other audio content when playing the first broadcast signal based on the time delay between the first broadcast signal and the second broadcast signal. For example, if the current terminal still has navigation playback, based on the navigation playback content, when the terminal is in the second state, the navigation-related content is played, and when the navigation-related content is played, the playback of the first broadcast signal can be paused. When the broadcast signal and the second broadcast signal play the same content at the same time, the time can be used as the time when the second broadcast signal is played. to complete the switching from the first broadcast signal to the second broadcast signal.
  • the received audio frame of the first broadcast signal is the white block in FIG. 7b
  • the received audio frame of the second broadcast signal is the black block in FIG. 7b
  • the second broadcast signal is played to the time when the audio frame is a white block, which can be expressed as the initial time. Therefore, the delay between the first broadcast signal and the second broadcast signal can be determined according to the initial moment and the first moment, that is, the delay ⁇ T satisfies:
  • ⁇ T T(initial time) ⁇ T(first time).
  • the audio content with the same duration as the time extension can be inserted into the time window, and the time point when the audio content is played can be used as the time point for switching to the second broadcast signal, and of course, it can also be ended in the time window.
  • the time point, as the time point of switching to the second broadcast signal, is not limited here.
  • the terminal may play the first broadcast signal in a non-single rate playback mode, so that, within the time window, the first broadcast signal is played at variable speed, so that the variable speed is played.
  • the audio frame played by the first broadcast signal is synchronized with the received audio frame of the second broadcast signal, so as to realize seamless switching between the first broadcast signal and the second broadcast signal and improve the listening experience of the user.
  • the terminal switches from the first state to the second state at the first moment, so that the way to finally switch the broadcast signal can be determined based on different scenarios.
  • the specific scenarios b1 and b2 are used as examples below.
  • the switching strategy is mainly described based on the strategy of preferentially selecting the FM broadcast signal when the signal of the FM broadcast station is good.
  • FIG. 7a a schematic flowchart of a method for playing a second broadcast signal provided by the present application. For example, when a vehicle enters an area with poor FM signal from an area with stable FM signal (such as entering a tunnel, parking lot, etc.), the FM signal needs to be switched to the network broadcast signal, which can include the following steps:
  • Step 701 The terminal switches from the first state to the second state at the first moment.
  • the terminal determines that the following conditions need to be met at the first moment: it is about to enter an area with weak FM signals, and the current area and the predicted future driving area have good network broadcast signals.
  • the terminal needs to switch from receiving FM broadcast signals to receiving network broadcast signals.
  • the area with weak FM broadcast signal is a tunnel area (area B includes a tunnel), at this time, the first broadcast signal may be an FM broadcast signal, and the second broadcast signal may be an Internet broadcast signal.
  • the strength of the FM broadcast signal is strong, and it can only receive the FM broadcast signal and play the received FM broadcast signal.
  • the strength of the FM broadcast signal is weak, that is, as shown in Figure 7b, when the terminal is in the third state, it can only receive the network broadcast signal and play the received network broadcast signal.
  • a second state is added between the first state and the third state.
  • the terminal in the second state, it continues to receive the FM broadcast signal, and by buffering the received FM broadcast signal, the FM broadcast signal can be played at a slower speed than the single speed, and at the same time, the network broadcast signal is also received and buffered.
  • the currently playing FM broadcast signal is synchronized with the currently received network broadcast signal, and then switches from the second state to the third state of only receiving and playing the network broadcast signal, realizing seamless switching and improving the user's listening experience.
  • a time window corresponding to the second state needs to be set for the terminal, and the start time of the time window is the first time and the end time is the second time.
  • the first time and the second time can be determined based on the intensity layer of the broadcast signal.
  • the current positioning position of the terminal is position 710, and the dotted line represents the possible future travel path 700 of the terminal.
  • the broadcast signal strength at the location 711 is equal to the first handover threshold, and within the first coverage area (eg, area D) composed of the location 711, the FM signal strength is higher than the first handover threshold, and the terminal leaves the first coverage area and enters the In area B, the FM signal is weak and needs to be switched to the network broadcast signal.
  • the position 711 can be determined as the critical point position where the broadcast signal needs to be switched (ie, the position point at which the second state is switched to the third state, and the moment when the vehicle moves to this position point is the first moment). Therefore, on the one hand, the first moment when the vehicle moves to the position point 711 is predicted according to the current motion state of the vehicle, the current positioning information and the map information, and on the other hand, according to the time lag between the two broadcast signals and the slowness of the FM broadcast signal.
  • the fast playback rate determines the time length of the time window corresponding to the second state, and the time length of the time window is sufficient to achieve synchronization between the played FM radio signal and the received network radio signal, and further according to the first moment and the time window
  • the length of time determines the start time of the time window (that is, the time point at which the first state is switched to the second state, that is, the first time).
  • the terminal can determine the time lag amount between the two broadcast signals by comparing the voiceprints of the received FM broadcast signal and the network broadcast signal.
  • the terminal receives a certain frame (upstream white block in Fig. 7b) of the first broadcast signal at a first moment (eg, moment 1), and receives a second frame at an initial moment (eg, moment 2)
  • a first moment eg, moment 1
  • a second frame eg, moment 2
  • the time difference between the first broadcast signal and the second broadcast signal is (time 1-time 2).
  • the terminal when it can play the first broadcast signal in the second state, it can use a method of inserting other audio signals whose time length is the time difference, or play the first broadcast signal at a slow speed, so that the terminal reaches the second broadcast signal at a slow speed.
  • the audio frame played by the first broadcast signal eg, the upstream checkered block in FIG. 7b
  • the received audio frame of the second broadcast signal eg, the downstream checkered block in FIG. 7b
  • the moving speed may change during the moving process. Therefore, during the moving process, for example, when the terminal moves from position 710 to position 712, the determined The second moment may change.
  • the predicted time to arrive at the position 711 based on the position 710 corresponding to the time 0 is the time 01 .
  • the time 01 When reaching the position 712, at this time, it is time 0'.
  • the moving speed of the terminal is accelerated, it is predicted that the time of reaching the position 711 is time 02, and the time 02 is earlier than the time 01. At this time, it is necessary to re-base the window length of the time window. and the second time (time 02 ), the first time is determined, that is, the first time determined at this time is earlier than the first time determined at the position 710 .
  • the actual arrival time of the terminal at position 711 is much later than the second predicted time at position 710.
  • Time (time 01) may lead to prematurely entering the third state, or prematurely entering the second state, causing unnecessary waste and even affecting smooth switching.
  • the second moment may be updated in real time based on the positioning position and motion state of the terminal, thereby updating the first moment based on the updated second moment.
  • the speed limit rule of the road may also be used to determine the time required for the terminal to move from position 710 to position 711.
  • Step 702 When the terminal is in the second state, receive and buffer the first broadcast signal and the second broadcast signal, and play the first broadcast signal at a rate slower than a single rate.
  • the second broadcast signal has a time delay relative to the first broadcast signal.
  • the speed of playback slower than the single speed is 0.x; 0.x can be set to be slightly smaller than 1.0, and within the user-insensitive range (for example, it can be Set to within ⁇ 12% media speed variation).
  • the double speed can also be preset by the user.
  • the terminal may compare the audio voiceprint of the first broadcast signal currently played by the player with the audio voiceprint of the received network broadcast, and determine the audio frame of the currently played first broadcast signal and the received network broadcast When the audio frames have the same content, it is determined that the first broadcast signal and the second broadcast signal are synchronized.
  • the first broadcast signal can be played at a slower rate than the single rate and synchronized with the reception of the second broadcast signal, which is called the first synchronization, and the time when the first synchronization is determined can be used as the second time.
  • the delay time difference between Internet radio audio and FM audio is ⁇ t1; the time window (from the first moment to the second moment) is ⁇ t2. Within the time window, the first broadcast signal is played at a slow speed from the first moment to the synchronization time. The time required for the point is ⁇ t2. At this time, the time difference between the slow playback time of the first broadcast signal player and the normal playback time satisfies:
  • the time difference is equal to the time delay ⁇ t1, that is, it satisfies:
  • the minimum value of the time window may be determined based on the average speed of the vehicle within the time window.
  • the average speed of the terminal within the time window can be estimated based on the map information through vehicle conditions, road conditions and traffic rules. Taking the average speed as v as an example, the minimum distance s corresponding to the minimum time window needs to satisfy:
  • the second position corresponding to the second moment determined based on the broadcast signal strength layer is the position that must be completely switched to receive the network broadcast signal, otherwise the broadcast effect will be affected.
  • the first time (corresponding to the first position) can be determined, so as to ensure that the user enters the second state when the time to reach the first synchronization does not exceed the second time. It's never too late to guarantee a better user experience and a lower cost of listening to the radio.
  • Step 703 The terminal switches from the second state to a third state in which only the second broadcast signal is received at the second moment.
  • the audio frame of the first broadcast signal currently played by the player and the received audio frame of the second broadcast signal have been completely synchronized.
  • the FM signal can be stopped, only the second broadcast signal can be received, and the received second broadcast signal can be played normally.
  • Step 704 Play the second broadcast signal at a single rate when the terminal is in the third state.
  • the network broadcast signal is played at a single rate, thereby completing the handover process.
  • Scenario b2 When the FM broadcast signal changes from weak to strong, it is necessary to switch from the network broadcast signal to the FM broadcast signal.
  • the terminal is currently playing the second broadcast signal, and the terminal switches from the scene where the first broadcast signal is weak to the scene where the first broadcast signal is strong, and the second broadcast signal has a time delay relative to the first broadcast signal (FM broadcast requires a time delay).
  • FM broadcast requires a time delay
  • “faster” than Internet broadcast) as an example to illustrate.
  • the terminal can only receive network radio signals, and during this period, the player can normally play the received network radio audio at 1.0 times the speed.
  • the signal source can be switched from the network broadcast signal to the FM broadcast signal.
  • the terminal When the terminal is in the second state, continue to play the received network broadcast signal, receive and buffer the FM broadcast signal, until the played network broadcast signal and the FM broadcast signal initially received in the second state have the same content (the second synchronization ), the second state ends, and it switches to the third state.
  • the third state the network broadcast signal is no longer received, only FM is received and the broadcast signal is buffered, and the buffered network broadcast signal is played at a rate faster than the single time from the start of the second state until the currently playing When the buffered network broadcast signal and the currently received network broadcast signal have the same content (the third synchronization), the third state is switched to the fourth state of only receiving and playing the network broadcast signal at a normal single rate, so as to realize seamless switching. Improve the listening experience of users.
  • FIG. 8a which is a schematic flowchart of a method for playing a second broadcast signal provided by the present application, the specific steps may include:
  • Step 801 The terminal switches from the first state to the second state at the first moment.
  • the terminal determines that the following conditions need to be met at the first moment: the area with weak FM signals will enter the area with strong FM signals.
  • the first broadcast signal is an Internet broadcast broadcast signal and the second broadcast signal is an FM broadcast signal. Based on the outgoing future travel path, it is determined that the terminal reaches a third position where the strength of the second broadcast signal is greater than or equal to the second switching threshold, thereby determining the first moment.
  • the terminal when the terminal is in the first state, the terminal is located in area B, that is, the strength of the FM broadcast signal received by the terminal is weak.
  • the current location of the terminal is location 810, which is in the first coverage area.
  • the strength of the FM signal is lower than the first switching threshold, and at this time, the terminal broadcasts the broadcast through the network broadcast signal.
  • the terminal leaves the first coverage area (area B), that is, after the terminal leaves the tunnel, the strength of the FM broadcast signal becomes stronger.
  • the terminal when the terminal reaches a third position where the strength of the second broadcast signal is greater than or equal to the second handover threshold After that, it can be switched to the second state to prepare to switch from the network broadcast signal to the FM broadcast signal.
  • the position 810 based on the strength of the second broadcast signal as the boundary of the first coverage area (area C) corresponding to the second handover threshold, and the predicted future travel path 800 when the terminal arrives, determine The location of its intersection is location 811 . Therefore, the position 811 can be determined as the critical point position of the broadcast signal to be switched (ie, the position point of switching from the first state to the second state, and the moment when the vehicle moves to this position point is the first moment).
  • the first moment corresponding to the position 811 is determined.
  • the first moment corresponding to the third position may be determined according to the predicted moment when the terminal reaches any position on the future driving path. For example, based on factors such as the position 810 obtained by positioning, the position 811 on the broadcast signal strength layer, the motion state of the terminal, the road conditions, and the future driving path of the terminal, the first moment when the terminal arrives at the position 811 can be predicted.
  • Step 802 When the terminal is in the second state, the first broadcast signal is played at a single rate, and the received second broadcast signal is buffered.
  • the terminal can enter a second state of simultaneously receiving the first broadcast signal and the second broadcast signal, and at this time, the strength of the second broadcast signal can meet the playback requirements.
  • the time length of the time window corresponding to the second state is determined, so that the time length is changed enough to make the first broadcast signal played at the end of the second state and the buffered
  • the content of a certain frame in the second broadcast signal is the same. For example, if the time length of the time window corresponding to the second state is set to be equal to the time lag amount, then the first broadcast signal played when the second state ends and the second state starts.
  • the second broadcast signal buffered at the initial time is the same broadcast content.
  • the terminal when the terminal enters the second state, the terminal receives the FM broadcast signal and the network broadcast signal at the same time.
  • the player normally plays the audio of the received network radio signal at a speed of 1.0 times, and buffers the audio of the received FM radio signal.
  • the terminal may compare the audio voiceprint of the first broadcast signal currently played by the player with the buffered audio voiceprint of the second broadcast, and determine the audio frame of the currently played first broadcast signal (the audio frame in FIG. 8b ).
  • the white block and the buffered audio frame of the Internet broadcast have the same content (the white block in FIG. 8b )
  • the played first broadcast signal can be synchronized with the initially buffered second broadcast signal, which is called the second synchronization, and the moment when the second synchronization is determined can be used as the second moment in the scenario.
  • Step 803 The terminal switches from the second state to a third state in which only the second broadcast signal is received at the second moment.
  • the terminal When the second synchronization time arrives, it is determined that the terminal enters the third state, and at this time, the terminal may stop receiving network broadcast signals.
  • Step 804 When the terminal is in the third state, play the buffered second broadcast signal at a rate faster than a single rate, and continue to buffer the received second broadcast signal.
  • the broadcast player of the terminal plays the FM audio at (1+0.x) times the speed. Until the buffered FM audio is played at double speed.
  • the terminal may compare the audio voiceprint of the first broadcast signal currently played by the player with the audio voiceprint of the received network broadcast, and determine that the audio frame of the currently played first broadcast signal is the same as the received audio frame of the network broadcast. content, it is determined that the first broadcast signal and the second broadcast signal reach a third synchronization, and the moment of the third synchronization is the third moment.
  • the audio content from the buffered white block to the left twill block is played quickly, so that when the third time arrives, the received second broadcast signal (the left twill block in Fig. 8b) is the same as the currently playing second broadcast signal.
  • the broadcast signal (left diagonal block in Figure 8b) is synchronized.
  • Step 805 The terminal switches from the third state to the fourth state at the third moment.
  • the received second broadcast signal is played at a single rate. At this point, the switching process is completed.
  • FIG. 9 is a structural block diagram of a map generating apparatus 900 provided by an embodiment of the present application.
  • the map generating apparatus 900 is, for example, a map server.
  • the map generating apparatus 900 includes: a receiving unit 901 and a processing unit 902 .
  • the receiving unit 901 and the processing unit 902 may also be two independent devices. Both the receiving unit 901 and the processing unit 902 are carried in the map server, the receiving unit 901 may be a communication unit in the map server, and the processing unit 902 may be It is a processing unit in the map server, and communication between the receiving unit 901 and the processing unit 902 can be performed in a wired or wireless manner.
  • the map generation apparatus 900 may be a map server, or may be a chip applied in the map server, or a combination device or component with a map generation function in a terminal device, or other devices with a map generation function. Combination devices, components, etc.
  • the receiving unit 901 may be a transceiver, may include an antenna and a radio frequency circuit, etc., or may be an interface circuit coupled with a processor
  • the processing unit 902 may be a processor, such as a baseband processor,
  • the baseband processor may include one or more central processing units (CPUs).
  • the receiving unit 901 may be a radio frequency unit, and the processing unit 902 may be a processor, such as a baseband processor.
  • the receiving unit 901 may be an input/output interface of the system-on-chip (eg, a baseband chip), and the determining unit may be a processor of the system-on-chip, which may include one or more central processing modules.
  • the processing unit 902 may be configured to perform all operations performed by the server in the embodiment shown in FIG. 5a except for the transceiving operations, and/or to support other processes of the techniques described herein.
  • the receiving unit 901 may be used to perform all the acquisition operations performed by the server in the embodiment shown in FIG. 5a, and/or to support other processes of the techniques described herein.
  • the receiving unit 901 may be a functional module, and the functional module can complete both the sending operation and the receiving operation.
  • the receiving unit 901 is a module included in the map generating apparatus 900, and the receiving unit 901 can be used to execute the operation shown in FIG. 5a. All sending operations and receiving operations performed by the server in the illustrated embodiment, for example, when performing a sending operation, the receiving unit 901 can be considered to be a sending module, and when performing a receiving operation, it can be considered that the receiving unit 901 is a receiving module;
  • the receiving unit 901 may also be a general term for two functional modules, the two functional modules are a sending module and a receiving module respectively, and the sending module is used to complete the sending operation.
  • the receiving unit 901 is a module included in the server, then the sending module It can be used to perform all the sending operations performed by the server in the embodiment shown in FIG. 5a, and the receiving module is used to complete the receiving operation.
  • the receiving unit 901 is a module included in the server, the receiving module can be used to perform the operations shown in FIG. 5a. All receive operations performed by the server in the illustrated embodiment.
  • the receiving unit 901 is configured to receive a plurality of first pieces of information, where each piece of first information includes a location location of the terminal, the intensity of the broadcast signal modulated with the first modulation frequency received by the terminal at the location location, and the first modulation frequency; the processing unit 902 is configured to generate a broadcast signal strength layer according to the plurality of first pieces of information, where the broadcast signal strength layer is used to represent the broadcast signal modulated with the first modulation frequency The first coverage area range corresponding to the first intensity range of .
  • the processing unit 902 is specifically configured to: determine the boundary of the first coverage area according to the multiple positioning positions in the multiple first information.
  • the processing unit 902 is specifically configured to: perform a comparison between the intensity of the broadcast signal received by the terminal at the positioning position in the plurality of first pieces of information and a preset first intensity threshold, respectively.
  • the obtained multiple comparison results and the multiple positioning positions in the multiple first information are compared to determine the boundary of the first coverage area.
  • the broadcast signal strength layer is further used to represent the second coverage area range corresponding to the second strength range of the broadcast signal modulated with the first modulation frequency.
  • the receiving unit 901 is further configured to receive multiple pieces of second information, each of the second pieces of information includes a positioning position of the terminal, and a second modulation received by the terminal at the positioning position.
  • the processing unit is further configured to generate the broadcast signal strength layer according to the plurality of second pieces of information, and the broadcast signal strength layer is further configured with where represents at least one coverage area range corresponding to at least one intensity range of the broadcast signal modulated with the second modulation frequency.
  • the processing unit 902 is further configured to preset at least one coverage area range corresponding to the at least one intensity range according to the modulation frequency and geographic information of the broadcast signal; Based on at least one coverage area range corresponding to the intensity range, a broadcast signal intensity layer is generated by training data in the plurality of first pieces of information, where the plurality of first pieces of information come from a plurality of terminals.
  • the division of units in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be other division methods.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit. In the device, it can also exist physically alone, or two or more units can be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • the software or firmware includes, but is not limited to, computer program instructions or code, and can be executed by a hardware processor.
  • the hardware includes, but is not limited to, various types of integrated circuits, such as a central processing unit (CPU), a digital signal processor (DSP), a field programmable gate array (FPGA), or an application specific integrated circuit (ASIC).
  • CPU central processing unit
  • DSP digital signal processor
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit
  • the map generating apparatus 1000 shown in FIG. 10 includes at least one processor 1001 .
  • the map generating apparatus 1000 also includes at least one memory 1002 for storing program instructions and/or data.
  • Memory 1002 is coupled to processor 1001 .
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1001 may cooperate with the memory 1002 , the processor 1001 may execute program instructions stored in the memory 1002 , and at least one of the at least one memory 1002 may be included in the processor 1001 .
  • the map generating apparatus 1000 may further include a communication interface 1003 for communicating with other devices through a transmission medium, so that the map generating apparatus 1000 can communicate with other devices.
  • the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces.
  • the transceiver when the communication interface is a transceiver, the transceiver may include an independent receiver and an independent transmitter; a transceiver with integrated transceiver functions, or an interface circuit, etc. may also be included.
  • connection medium between the above-mentioned processor 1001 , the memory 1002 , and the communication interface 1003 is not limited in the embodiments of the present application.
  • the memory 1002, the processor 1001, and the communication interface 1003 are connected through a communication bus 1004 in FIG. 10.
  • the bus is represented by a thick line in FIG. 10, and the connection mode between other components is only a schematic illustration , not as a limitation.
  • the bus may include an address bus, a data bus, a control bus, and the like. For convenience of presentation, only one thick line is used in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • the map generating apparatus 1000 is used to implement the steps performed by the server in the above-mentioned process shown in FIG. 5a, and the map generating apparatus 1000 may be a server, or a chip or circuit in the server.
  • the communication interface 1003 is used to perform the related operations of sending and receiving on the server side in the above embodiment.
  • the processor 1001 is configured to perform the processing-related operations on the server side in the above method embodiments.
  • the processor 1001 is configured to generate a broadcast signal strength layer according to the plurality of first pieces of information, where the broadcast signal strength layer is used to represent a first strength range of the broadcast signal modulated with the first modulation frequency The corresponding first coverage area.
  • a plurality of first pieces of information are received through the communication interface 1003 , each of the first pieces of information includes a positioning position of the terminal, the strength of a broadcast signal modulated with a first modulation frequency received by the terminal at the positioning position, and the first information. modulation frequency.
  • FIG. 11 is a structural block diagram of a map generating apparatus 1100 provided by an embodiment of the present application.
  • the map generating apparatus 1100 is, for example, a terminal.
  • the map generation apparatus 1100 includes a detection unit 1101 , an acquisition unit 1102 and a transmission unit 1103 .
  • a processing unit 1104 may also be included.
  • the acquiring unit 1102 and the transmitting unit 1103 may be communication units in the terminal
  • the detecting unit 1101 and the processing unit 1104 may be the detecting unit and the processing unit in the terminal
  • the acquiring unit 1102, the transmitting unit 1103, the detecting unit 1101 and the processing unit 1104 Communication can be carried out by wire or wirelessly.
  • the map generating apparatus 1100 may be a terminal.
  • the terminal includes a user equipment, a terminal device, a vehicle, or a vehicle-mounted device in a vehicle.
  • the terminal may be a terminal device, a chip applied in the terminal device, a map generation device in the terminal device, or a chip applied in the map generation device in the terminal device, the terminal may also be It is a vehicle with a map generation function and is applied to a chip in a vehicle with a map generation function, or the terminal can also be an on-board device of a vehicle with a map generation function, applied to a vehicle with a map generation function.
  • the acquiring unit 1102 and the transmitting unit 1103 may be transceivers, may include an antenna and a radio frequency circuit, etc., or may be an interface circuit coupled to a processor, and the detection unit 1101 may be a processor, such as a baseband
  • the baseband processor may include one or more central processing units (CPUs).
  • the acquiring unit 1102 and the transmitting unit 1103 may be radio frequency units
  • the detection unit 1101 may be a device with the function of detecting the broadcast signal strength
  • the detection unit 1101 may also be coupled with the processing unit 1104 in a On one processor, or separate processors.
  • the acquiring unit 1102 and the sending unit 1103 may be the input and output interfaces of the chip system (for example, a baseband chip), and the determining unit may be a processor of the chip system, which may include one or more central processing modules .
  • the detection unit 1101 and the processing unit 1104 may be used to perform all operations performed by the terminal in the embodiment shown in FIG. 5a except for the transceiving operation, and/or to support other processes of the technology described herein.
  • the acquisition unit 1102 may be used to perform all the acquisition operations performed by the terminal in the embodiment shown in FIG. 5a, and/or to support other processes of the techniques described herein.
  • the sending unit 1103 may be used to perform all sending operations performed by the terminal in the embodiment shown in FIG. 5a, and/or to support other processes of the techniques described herein.
  • the obtaining unit 1102 and the sending unit 1103 may be a functional module, and the functional module can perform both the sending operation and the receiving operation.
  • the obtaining unit 1102 and the sending unit 1103 are modules included in the map generating apparatus 1100, and the obtaining unit 1102 and the sending unit 1103 can be used to perform all sending operations and receiving operations performed by the terminal in the embodiment shown in FIG.
  • the acquisition unit 1102 is a receiving module; alternatively, the acquisition unit 1102 and the sending unit 1103 can also be collectively referred to as two functional modules, these two functional modules are respectively a sending module and a receiving module, and the sending module is used to complete the sending
  • the sending unit 1103 is a module included in the terminal
  • the sending module can be used to perform all sending operations performed by the terminal in the embodiment shown in FIG. 5a
  • the receiving module is used to complete the receiving operation.
  • the obtaining unit 1102 is a If the module included in the terminal is the receiving module, the receiving module may be used to perform all the receiving operations performed by the terminal in the embodiment shown in FIG. 5a.
  • the acquiring unit 1102 is used to acquire the first positioning position of the terminal; the detecting unit 1101 is used to detect the strength of the broadcast signal received by the terminal at the first positioning position; the sending unit 1103 is used to send the first positioning position to the server.
  • the apparatus further includes a processing unit 1104, configured to compare the strength of the broadcast signal received by the terminal at the first positioning position with the preset information before the sending unit 1103 sends the first information to the server. By comparing the set thresholds of the intensity range, it is determined that the first positioning position is located at the boundary of the coverage area.
  • the map generating apparatus 1200 shown in FIG. 12 includes at least one processor 1201 .
  • the map generating apparatus 1200 also includes at least one memory 1202 for storing program instructions and/or data.
  • Memory 1202 and processor 1201 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1201 may cooperate with the memory 1202, the processor 1201 may execute program instructions stored in the memory 1202, and at least one of the at least one memory 1202 may be included in the processor 1201.
  • the map generating apparatus 1200 may further include a communication interface 1203 for communicating with other devices through a transmission medium, so that the map generating apparatus 1200 can communicate with other devices.
  • the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces.
  • the transceiver when the communication interface is a transceiver, the transceiver may include an independent receiver and an independent transmitter; a transceiver with integrated transceiver functions, or an interface circuit, etc. may also be included.
  • connection medium among the above-mentioned processor 1201 , memory 1202 , and communication interface 1203 is not limited in the embodiments of the present application.
  • the memory 1202, the processor 1201, and the communication interface 1203 are connected through a communication bus 1204 in FIG. 12.
  • the bus is represented by a thick line in FIG. 12, and the connection between other components is only a schematic illustration. , not as a limitation.
  • the bus may include an address bus, a data bus, a control bus, and the like. For convenience of presentation, only one thick line is used in FIG. 12, but it does not mean that there is only one bus or one type of bus or the like.
  • the map generating apparatus 1200 is configured to implement the steps performed by the terminal in the above process shown in FIG. 5a, and the map generating apparatus 1200 may be a terminal, or a chip or circuit in the terminal.
  • the communication interface 1203 is used to perform the related operations of the terminal side receiving and sending in the above embodiment.
  • the processor 1201 is configured to perform processing-related operations on the terminal side in the above method embodiments.
  • the processor 1201 is configured to detect the strength of the broadcast signal received by the terminal at the first positioning position.
  • the processor 1201 is further configured to, before sending the first information to the server, compare the strength of the broadcast signal received by the terminal at the first positioning position with the preset all information. The threshold value of the intensity range is compared, and it is determined that the first positioning position is located at the boundary of the coverage area range.
  • FIG. 13 is a structural block diagram of an apparatus 1300 for playing a broadcast signal according to an embodiment of the present application.
  • the playback device 1300 of the broadcast signal is, for example, a terminal.
  • the apparatus 1300 for playing broadcast signals includes a processing unit 1301 and a playing unit 1302 , and optionally, a receiving unit 1303 .
  • the receiving unit 1303 may be a communication unit in the terminal
  • the processing unit 1301 may be a processing unit in the terminal
  • the connection between the playback unit 1302 and the processing unit 1031, or between the receiving unit 1303 and the processing unit 1301 may be wired or wireless way to communicate.
  • the broadcast signal playing apparatus 1300 may be a terminal.
  • the terminal includes user equipment, terminal equipment, a vehicle, or a vehicle-mounted device in a vehicle.
  • the terminal may be a terminal device, a chip applied in the terminal device, a broadcast signal playback device in the terminal device, or a chip applied in a broadcast signal playback device in the terminal device, so
  • the terminal may also be a vehicle with a broadcast signal playback function, applied to a chip in a vehicle with a broadcast signal playback function, or the terminal may also be a vehicle-mounted device with a broadcast signal playback function, applied to A chip of a vehicle-mounted device in a vehicle with a broadcast signal playback function, or a combination device or component with a broadcast signal playback function in the vehicle-mounted device, or other combination devices or components with a broadcast signal playback function.
  • the receiving unit 1303 may be a transceiver, may include an antenna and a radio frequency circuit, etc., or may be an interface circuit coupled to a processor, and the processing unit 1301 may be a processor, such as a baseband processor , the baseband processor may include one or more central processing units (CPUs).
  • the receiving unit 1303 may be a radio frequency unit, and the processing unit 1301 may be a processor, such as a baseband processor.
  • the receiving unit 1303 may be an input/output interface of the chip system (eg, a baseband chip), and the determining unit may be a processor of the chip system, which may include one or more central processing modules.
  • the chip system eg, a baseband chip
  • the determining unit may be a processor of the chip system, which may include one or more central processing modules.
  • the processing unit 1301 may be used to perform all the operations performed by the terminal in the embodiment shown in FIG. 6, FIG. 7a or FIG. 8a except for the transceiving operation, and/or for supporting the technology described herein.
  • the receiving unit 1303 may be used to perform all receiving operations performed by the terminal in the embodiments shown in Figure 6, Figure 7a, or Figure 8a, and/or for other processes in support of the techniques described herein.
  • the receiving unit 1303 may be a functional module, which can complete both the sending operation and the receiving operation.
  • the receiving unit 1303 is a module included in the broadcast signal playback device 1300, and the receiving unit 1303 can be used to execute the 6. All sending operations and receiving operations performed by the terminal in the embodiment shown in FIG. 7a or FIG. 8a, for example, when performing a sending operation, the receiving unit 1303 can be considered as a sending module, and when performing a receiving operation, it can be considered as a sending module.
  • the receiving unit 1303 is a receiving module; alternatively, the receiving unit 1303 can also be a general term for two functional modules, the two functional modules are respectively a sending module and a receiving module, and the sending module is used to complete the sending operation, for example, the receiving unit 1303 is a terminal
  • the sending module can be used to perform all the sending operations performed by the terminal in the embodiment shown in FIG. 6, FIG. 7a or FIG. If the included modules are included, the receiving module can be used to perform all the receiving operations performed by the terminal in the embodiment shown in FIG. 6 , FIG. 7 a or FIG. 8 a .
  • the receiving unit 1303 is configured to receive the broadcast signal strength layer from the map server, the broadcast signal strength layer belongs to the map layer, and the broadcast signal strength layer is used to represent the broadcast signal corresponding to the strength level of the broadcast signal
  • the coverage area of The first state of the first broadcast signal is switched to the second state of simultaneously receiving the first broadcast signal and the second broadcast signal, wherein the types of the first broadcast signal and the second broadcast signal are different; In the state, the playing unit 1302 plays the received first broadcast signal at a single rate; when in the second state, the playing unit 1302 plays the first broadcast signal received.
  • the second broadcast signal has a time delay relative to the first broadcast signal
  • the processing unit 1301 is configured to use the playback unit 1302 when in the second state. Playing the first broadcast signal at a single rate, the processing unit 1301 is further configured to switch from the second state to a third state in which only the second broadcast signal is received at a second moment, and the second moment is playing when the first broadcast signal is first synchronized with the received second broadcast signal; when in the third state, the second broadcast signal is played at a single rate by the playing unit 1302 .
  • the first broadcast signal has a time delay relative to the second broadcast signal
  • the processing unit 1301 is configured to use the playback unit 1302 at a single speed when in the second state. Playing the first broadcast signal at a rate and buffering the received second broadcast signal, the processing unit 1301 is further configured to: switch from the second state to a first state that only receives the second broadcast signal at the second moment Three states, the second time is the time when the played first broadcast signal is second synchronized with the initially buffered second broadcast signal.
  • the playback unit 1302 plays a Play the buffered second broadcast signal at double rate, and continue to buffer the received second broadcast signal; switch from the third state to the fourth state at the third moment, the third moment is the buffered
  • the playing unit 1302 plays the received second broadcast signal at a single rate.
  • the software or firmware includes, but is not limited to, computer program instructions or code, and can be executed by a hardware processor.
  • the hardware includes, but is not limited to, various types of integrated circuits, such as a central processing unit (CPU), a digital signal processor (DSP), a field programmable gate array (FPGA), or an application specific integrated circuit (ASIC).
  • CPU central processing unit
  • DSP digital signal processor
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit
  • the broadcast signal playback apparatus 1400 shown in FIG. 14 includes at least one processor 1401 .
  • the broadcast signal playing apparatus 1400 further includes at least one memory 1402 for storing program instructions and/or data.
  • Memory 1402 and processor 1401 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1401 may cooperate with the memory 1402, the processor 1401 may execute program instructions stored in the memory 1402, and at least one of the at least one memory 1402 may be included in the processor 1401.
  • the broadcast signal playback apparatus 1400 may further include a communication interface 1403 for communicating with other devices through a transmission medium, so that the broadcast signal playback apparatus 1400 may communicate with other devices.
  • the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces.
  • the transceiver when the communication interface is a transceiver, the transceiver may include an independent receiver and an independent transmitter; a transceiver with integrated transceiver functions, or an interface circuit, etc. may also be included.
  • connection medium between the processor 1401, the memory 1402, and the communication interface 1403 is not limited in the embodiments of the present application.
  • the memory 1402, the processor 1401, and the communication interface 1403 are connected through a communication bus 1404 in FIG. 13.
  • the bus is represented by a thick line in FIG. 13, and the connection mode between other components is only a schematic illustration. , not as a limitation.
  • the bus may include an address bus, a data bus, a control bus, and the like. For convenience of presentation, only one thick line is used in FIG. 13, but it does not mean that there is only one bus or one type of bus.
  • the broadcast signal playing apparatus 1400 is used to implement the steps performed by the terminal shown in FIG. 6 , FIG. 7 a or FIG. 8 a , and the broadcast signal playing apparatus 1400 may be a terminal, or a chip or circuit in the terminal.
  • the communication interface 1403 is used to perform the related operations of receiving and sending on the terminal side in the above embodiments.
  • the processor 1401 is configured to perform processing-related operations on the terminal side in the above method embodiments.
  • the processor 1401 is configured to, according to the current positioning position of the terminal, the current motion state of the terminal, the future driving path of the terminal, and the broadcast signal strength layer, at the first moment from receiving only the first
  • the first state of the broadcast signal is switched to the second state of simultaneously receiving the first broadcast signal and the second broadcast signal, wherein the types of the first broadcast signal and the second broadcast signal are different; when in the first state , playing the received first broadcast signal at a single rate; when in the second state, playing the received first broadcast signal.
  • An embodiment of the present application further provides a communication system, where the communication system includes a map generation apparatus 900 or a map generation apparatus 1000, the communication system includes a map generation apparatus 1100 or a map generation apparatus 1200, and may also include a broadcast signal playback apparatus 1300 or a broadcast Signal playback device 1400 .
  • Embodiments of the present application further provide a computer storage medium, where instructions are stored in the computer-readable storage medium, when the computer-readable storage medium runs on a processor, the positioning apparatus causes the positioning apparatus to perform any one of the possible implementations of the foregoing embodiments. the method described.
  • the embodiments of the present application further provide a computer program product including instructions, and the computer program product stores the instructions, when the computer program product runs on the processor, the positioning apparatus is made to execute any one of the possible implementation manners of the foregoing embodiments. method described in.
  • the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which can implement or
  • a general purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or may also be a volatile memory (volatile memory), for example Random-access memory (RAM).
  • Memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • the memory in this embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and/or data.
  • the methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented in software, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server or data center by means of wired (such as coaxial cable, optical fiber, digital subscriber line, DSL for short) or wireless (such as infrared, wireless, microwave, etc.)
  • a computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media.
  • the available media can be magnetic media (eg, floppy disks, hard disks, magnetic tape), optical media (eg, digital video disc (DVD) for short), or semiconductor media (eg, SSD), and the like.
  • “at least one” refers to one or more, and “multiple” refers to two or more.
  • “And/or”, which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an “or” relationship.
  • At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • At least one (a) of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.
  • the disclosed apparatus and method may be implemented in other manners without exceeding the scope of the present application.
  • the above-described embodiments are only illustrative.
  • the division of the modules or units is only a logical function division.
  • multiple units or components may be combined. Either it can be integrated into another system, or some features can be omitted, or not implemented.
  • the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units .
  • Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

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Abstract

本申请提供一种广播信号的播放方法、地图生成方法及装置，其中，地图生成方法包括: 接收多个第一信息，每个所述第一信息包括终端的定位位置、所述终端在所述定位位置接收的以第一调制频率调制的广播信号的强度和所述第一调制频率；根据所述多个第一信息，生成广播信号强度图层，所述广播信号强度图层用于表示以所述第一调制频率调制的广播信号的第一强度范围所对应的第一覆盖区域范围。

Description

一种广播信号的播放方法、地图生成方法及装置
相关申请的交叉引用
本申请要求在2020年09月04日提交中国专利局、申请号为202010921926.X、申请名称为“一种广播信号的播放方法、地图生成方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术和网联车技术领域，尤其涉及一种广播信号的播放方法、地图生成方法及装置。
背景技术
随着网络技术的不断发展，影音压缩技术的不断进步，多媒体内容数字化技术随之不断更新，这使得影音信息可以通过网络快速传播。
空中广播一般基于振幅调制(amplitude modulation，AM)和频率调制(frequency modulation，FM)，AM和FM指的是无线电学上的两种不同调制方式。空中广播的音频信号通过广播机构架设的无线电广播发射装置以模拟信号的形式发射。
网络广播通过网络(互联网、无线蜂窝网等)作为媒介，将音频信号以标准IP数据包形式在局域网和广域网上进行传送，只要有网络信号可以接收的地方，便可以收听到网络电台，无地域性限制。
目前，许多广播机构除了利用传统的无线电空中广播方式传送节目外，还架设了多媒体流服务器，使得音频信号可以通过网络广播传送。
空中广播所传送的信号因终端(如收音机)所处的环境被屏蔽物屏蔽(如地铁里、屏蔽建筑物里)或终端的质量差异等原因，常常导致用户收听不到无线广播或效果非常差；而网络可能信号质量差而影响收听效果，并且一般会产生额外费用，造成用户在使用终端收听电台节目时，经常因为以上原因需要对在空中广播和网络广播之间进行切换。但是，由于空中广播和网络广播的传输并不同步，导致切换后可能出现滞后或漏听部分内容的问题，从而降低用户的使用体验。
发明内容
本申请提供一种广播信号的播放方法、地图生成方法及装置，用于提高广播的收听体验。
第一方面，本申请提供一种地图生成方法，该方法可以由地图生成装置执行；地图生成装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。示例性的，地图生成装置可以是地图服务器。该方法可以包括：接收多个第一信息，每个所述第一信息包括终端的定位位置、所述终端在所述定位位置接收的以第一调制频率调制的广播信号的强度和所述第一调制频率；根据所述多个第一信息，生成广播信号强度图层，所述广播信号强度图层用于表示以所述第一调制频率调制的广播信号的第一强度范 围所对应的第一覆盖区域范围。
通过上述方法，通过接收到的多个第一信息，可以生成第一调整频率对应的广播信号的广播信号强度图层，该广播信号强度图层可以表示定位位置与广播信号的强度的对应关系，从而，在终端收听广播的移动过程中，基于地图中新增的该广播信号强度图层，可以指导终端在接收到广播信号强度较低的位置切换至另一广播信号上，从而，提高广播的收听体验，并且，可以基于地图中的新增的广播信号强度图层，可以提前确定即将进入广播信号弱的区域，从而，提前切换广播信号，避免在接收到广播信号过弱，收听效果较差后再进行切换，提高了用户的收听体验。
一种可能的实现方式，根据所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
通过上述方法，可以在广播信号强度图层中，确定相同广播信号强度对应的定位位置，从而，确定所述第一覆盖区域范围的边界，以便终端更好的确定广播信号强度较低的位置，以便终端更好的确定切换时机。
一种可能的实现方式，根据所述多个第一信息中所述终端在所述定位位置接收的广播信号的强度分别与预设的第一强度阈值进行比较得到的多个比较结果，以及所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
通过上述方法，可以综合多个第一信息中，在相同或相近的广播信号强度与预设的第一强度阈值进行比较，从而，可以更好的确定所述第一覆盖区域范围的边界。
一种可能的实现方式，所述广播信号强度图层还用于表示以所述第一调制频率调制的广播信号的第二强度范围所对应的第二覆盖区域范围。
通过上述方法，地图中可以设置多个强度范围对应的覆盖区域范围，从而，终端在基于该广播信号强度图层进行切换信号时，可以选择不同的强度范围，以更好的适应终端基于该广播信号强度图层进行切换信号的各种不同的场景，提高广播信号强度图层的适用性。
一种可能的实现方式，接收多个第二信息，每个所述第二信息包括终端的定位位置、所述终端在所述定位位置接收的以第二调制频率调制的广播信号的强度和所述第二调制频率；根据所述多个第二信息，生成所述广播信号强度图层，所述广播信号强度图层还用于表示以所述第二调制频率调制的广播信号的至少一个强度范围所对应的至少一个覆盖区域范围。
通过上述方法，地图中还可以基于多个第二信息，生成第二调制频率的广播信号对应的广播信号强度图层，从而，可以适应更多的广播信号的切换场景，提高地图的适用性。
一种可能的实现方式，根据广播信号的调制频率和地理信息预设所述至少一个强度范围所对应的至少一个覆盖区域范围；在预设的所述至少一个强度范围所对应的至少一个覆盖区域范围的基础上，通过对所述多个第一信息中的数据进行训练生成广播信号强度图层，其中，多个第一信息来自于多个终端。
通过上述方法，可以基于多个终端采集的第一信息，对广播信号强度图层进行训练，从而，可以获得更加准确可信的广播信号强度的分布，以便终端更好的确定广播信号强度较低的位置，以便终端更好的确定切换时机，提高终端的收听体验。
第二方面，本申请提供一种地图生成方法，该方法可以由地图生成装置执行；地图生成装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。示例性的，地图生成装置可以是终端设备、车辆或车载装置。该方法可以包括：获 取所述终端的第一定位位置；检测终端在所述第一定位位置接收的广播信号的强度；向服务器发送第一信息，所述第一信息包括所述第一定位位置、所述终端在所述第一定位位置接收的广播信号的强度和所述广播信号的调制频率，所述第一信息用于确定广播信号强度图层中广播信号的强度范围所对应的覆盖区域范围。
通过上述方法，终端可以基于检测到的在所述第一定位位置接收的广播信号的强度，向地图服务器发送第一信息，从而，使得地图服务器可以基于接收到的第一信息，确定广播信号强度图层中广播信号的强度范围所对应的覆盖区域范围，为地图服务器生成广播信号强度图层提供数据基础。
一种可能的实现方式，向服务器发送第一信息之前，还可以通过将终端在所述第一定位位置接收的广播信号的强度与预设的所述强度范围的阈值的比较，确定所述第一定位位置位于所述覆盖区域范围的边界。
通过上述方法，可以在终端比较所述第一定位位置接收的广播信号的强度与预设的所述强度范围的阈值后，确定不在阈值附近则不上报第一信息，若确定在阈值附近，则上报第一信息，以降低终端上报第一信息的开销。并且，还可以减少地图服务器对第一信息的处理所占用的功耗，提高地图生成的效率。
第三方面，本申请提供一种广播信号的播放方法，该方法可以由广播信号的播放装置执行；广播信号的播放装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。示例性的，广播信号的播放装置可以是终端设备、车辆或车载装置。下面以广播信号的播放装置为终端为例说明。该方法包括：终端接收来自地图服务器的广播信号强度图层，所述广播信号强度图层属于地图图层，所述广播信号强度图层用于表示广播信号的强度等级所对应广播信号的覆盖范围；根据所述终端的当前定位位置、所述终端的当前运动状态、所述终端的未来行驶路径和所述广播信号强度图层，在第一时刻从仅接收第一广播信号的第一状态切换为同时接收第一广播信号和第二广播信号的第二状态，其中，所述第一广播信号和所述第二广播信号的类型不同；所述终端处于所述第一状态时以单倍速率播放接收的所述第一广播信号；所述终端处于所述第二状态时播放接收的所述第一广播信号。
通过上述方法，终端可以基于地图中的新增的广播信号强度图层，可以提前确定即将进入广播信号弱的区域，即确定第一时刻为即将进入广播信号弱的时刻，从而，提前进入第二状态，基于第二状态同时接收到的第一广播信号和第二广播信号，为切换广播信号做准备，避免在接收到广播信号过弱，收听效果较差后再进行切换，提高了用户的收听体验。
一种可能的实现方式，所述第二广播信号相对于所述第一广播信号存在时延，所述终端处于所述第二状态时以慢于单倍速率播放所述第一广播信号，此时，所述终端在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态，所述第二时刻为播放的所述第一广播信号与接收的第二广播信号第一同步的时刻；所述终端处于所述第三状态时以单倍速率播放所述第二广播信号。
通过上述方法，在当前播放的第一广播信号比接收到的第二广播信号慢时，可以在第二状态时以慢于单倍速率播放所述第一广播信号，使得终端在第二状态结束时，播放的第一广播信号与接收到的广播信号可以实现同步，从而，避免直接切换后可能出现滞后的问题，可以实现广播信号的无缝切换，提高用户的收听体验。
一种可能的实现方式，所述第一广播信号相对于所述第二广播信号存在时延，所述终 端处于所述第二状态时以单倍速率播放所述第一广播信号并且缓存接收到的所述第二广播信号，此时，所述终端在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态，所述第二时刻为播放的所述第一广播信号与起始缓存的第二广播信号第二同步的时刻，所述终端处于所述第三状态时以快于单倍速率播放缓存的所述第二广播信号，并且继续缓存接收到的所述第二广播信号；所述终端在第三时刻从所述第三状态切换为第四状态，所述第三时刻为缓存的所述第二广播信号与播放的所述第二广播信号第三同步的时刻，所述终端处于所述第四状态时以单倍速率播放接收的所述第二广播信号。
通过上述方法，在当前播放的第一广播信号比接收到的第二广播信号快时，可以在第二状态时，缓存第二广播信号，在第二状态结束时，接收到的第二广播信号与当前播放的第一广播信号可以同步，从而，在第二状态结束时，开始第三状态，在第三状态下以快于单倍速率播放所述第二广播信号，以追赶上接收到的第二广播信号，即在第三状态结束时，可以实现播放的第二广播信号与接收到的第二广播信号同步，从而，在第四状态时，完成切换。该方法可以避免直接切换后可能出现的漏听的问题，可以实现广播信号的无缝切换，提高用户的收听体验。
第四方面，本申请提供一种地图生成装置，该地图生成装置可以应用于地图服务器或者地图服务器的芯片系统上。该地图生成装置可以包括：接收单元和处理单元。其中，接收单元，用于接收多个第一信息，每个所述第一信息包括终端的定位位置、所述终端在所述定位位置接收的以第一调制频率调制的广播信号的强度和所述第一调制频率；处理单元，用于根据所述多个第一信息，生成广播信号强度图层，所述广播信号强度图层用于表示以所述第一调制频率调制的广播信号的第一强度范围所对应的第一覆盖区域范围。
一种可能的实现方式，所述处理单元，具体用于：根据所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
一种可能的实现方式，所述处理单元，具体用于：根据所述多个第一信息中所述终端在所述定位位置接收的广播信号的强度分别与预设的第一强度阈值进行比较得到的多个比较结果，以及所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
一种可能的实现方式，所述广播信号强度图层还用于表示以所述第一调制频率调制的广播信号的第二强度范围所对应的第二覆盖区域范围。
一种可能的实现方式，所述接收单元，还用于接收多个第二信息，每个所述第二信息包括终端的定位位置、所述终端在所述定位位置接收的以第二调制频率调制的广播信号的强度和所述第二调制频率；所述处理单元，还用于根据所述多个第二信息，生成所述广播信号强度图层，所述广播信号强度图层还用于表示以所述第二调制频率调制的广播信号的至少一个强度范围所对应的至少一个覆盖区域范围。
一种可能的实现方式，所述处理单元，还用于根据广播信号的调制频率和地理信息预设所述至少一个强度范围所对应的至少一个覆盖区域范围；在预设的所述至少一个强度范围所对应的至少一个覆盖区域范围的基础上，通过对所述多个第一信息中的数据进行训练生成广播信号强度图层，其中，多个第一信息来自于多个终端。
第五方面，本申请实施例提供一种地图生成装置，该地图生成装置可以应用于地图服务器或者地图服务器的芯片系统上，该地图生成装置包括处理器，用于实现上述第一方面描述的方法。所述装置还可以包括存储器，用于存储程序和指令。所述存储器与处理器耦 合，所述处理器执行所述存储器中存储的程序指令时，可以实现上述第一方面描述的方法。所述装置还可以包括接口电路，所述接口电路用于该装置与其它设备进行通信，示例的，所述接口电路可以是收发器、电路、总线、模块或其它类型的接口电路。示例性地，所述地图生成装置为地图服务器，或者为设置在地图服务器中的芯片。其中，收发器例如通过地图服务器中的天线、馈线和编解码器等实现，或者，如果所述地图生成装置为设置在地图服务器中的芯片，那么接口电路例如为芯片中的通信接口，该通信接口与地图服务器中的射频收发组件连接，以通过射频收发组件实现信息的收发。
关于第四方面和第五方面或各种可能的实施方式的技术效果，可参考对于第一方面或相应的实施方式的技术效果的介绍。
第六方面，本申请提供一种地图生成装置，该地图生成装置可以应用于终端设备、车辆或车载装置。该地图生成装置可以包括：获取单元，用于获取所述终端的第一定位位置；检测单元，用于检测终端在所述第一定位位置接收的广播信号的强度；发送单元，用于向服务器发送第一信息，所述第一信息包括所述第一定位位置、所述终端在所述第一定位位置接收的广播信号的强度和所述广播信号的调制频率，所述第一信息用于确定广播信号强度图层中广播信号的强度范围所对应的覆盖区域范围。
一种可能的实现方式，所述装置还包括处理单元，用于在所述发送单元向服务器发送第一信息之前，通过将终端在所述第一定位位置接收的广播信号的强度与预设的所述强度范围的阈值的比较，确定所述第一定位位置位于所述覆盖区域范围的边界。
第七方面，本申请实施例提供一种地图生成装置，该地图生成装置可以应用于终端设备、车辆或车载装置。该地图生成装置包括处理器，用于实现上述第二方面描述的方法。所述装置还可以包括存储器，用于存储程序和指令。所述存储器与处理器耦合，所述处理器执行所述存储器中存储的程序指令时，可以实现上述第二方面描述的方法。所述装置还可以包括接口电路，所述接口电路用于该装置与其它设备进行通信，示例的，所述接口电路可以是收发器、电路、总线、模块或其它类型的接口电路。示例性地，所述地图生成装置为终端设备，或者为设置在终端设备中的芯片。其中，收发器例如通过终端设备中的天线、馈线和编解码器等实现，或者，如果所述地图生成装置为设置在终端设备中的芯片，那么接口电路例如为芯片中的通信接口，该通信接口与终端设备中的射频收发组件连接，以通过射频收发组件实现信息的收发。关于第六方面和第七方面的技术效果，可参考对于第二方面及相应的实施方式的技术效果的介绍。
第八方面，本申请提供一种广播信号的播放装置，可以应用于终端设备、车辆或车载装置上。该广播信号的播放装置可以包括：接收单元和处理单元。其中，接收单元，用于接收来自地图服务器的广播信号强度图层，所述广播信号强度图层属于地图图层，所述广播信号强度图层用于表示广播信号的强度等级所对应广播信号的覆盖范围；处理单元，用于根据所述终端的当前定位位置、所述终端的当前运动状态、所述终端的未来行驶路径和所述广播信号强度图层，在第一时刻从仅接收第一广播信号的第一状态切换为同时接收第一广播信号和第二广播信号的第二状态，其中，所述第一广播信号和所述第二广播信号的类型不同；处于所述第一状态时，通过播放单元以单倍速率播放接收的所述第一广播信号；处于所述第二状态时，通过所述播放单元播放接收的所述第一广播信号。
一种可能的实现方式，所述第二广播信号相对于所述第一广播信号存在时延，所述处理单元，用于处于所述第二状态时，通过所述播放单元以慢于单倍速率播放所述第一广播 信号，所述处理单元，还用于在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态，所述第二时刻为播放的所述第一广播信号与接收的第二广播信号第一同步的时刻；处于所述第三状态时，通过所述播放单元以单倍速率播放所述第二广播信号。
一种可能的实现方式，所述第一广播信号相对于所述第二广播信号存在时延，所述处理单元，用于处于所述第二状态时，通过所述播放单元以单倍速率播放所述第一广播信号并且缓存接收到的所述第二广播信号，所述处理单元，还用于：在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态，所述第二时刻为播放的所述第一广播信号与起始缓存的第二广播信号第二同步的时刻，处于所述第三状态时，通过所述播放单元以快于单倍速率播放缓存的所述第二广播信号，并且继续缓存接收到的所述第二广播信号；在第三时刻从所述第三状态切换为第四状态，所述第三时刻为缓存的所述第二广播信号与播放的所述第二广播信号第三同步的时刻，处于所述第四状态时，通过所述播放单元以单倍速率播放接收的所述第二广播信号。
第九方面，本申请提供一种广播信号的播放装置，该广播信号的播放装置可以应用于终端设备、车辆或车载装置。该广播信号的播放装置包括处理器，用于实现上述第三方面描述的方法。所述装置还可以包括存储器，用于存储程序和指令。所述存储器与处理器耦合，所述处理器执行所述存储器中存储的程序指令时，可以实现上述第三方面描述的方法。所述装置还可以包括接口电路，所述接口电路用于该装置与其它设备进行通信，示例的，所述接口电路可以是收发器、电路、总线、模块或其它类型的接口电路。示例性地，所述广播信号的播放装置为车载设备，或者为设置在车载设备中的芯片。其中，收发器例如通过车载设备中的天线、馈线和编解码器等实现，或者，如果所述广播信号的播放装置为设置在车载设备中的芯片，那么接口电路例如为芯片中的通信接口，该通信接口与车载设备中的射频收发组件连接，以通过射频收发组件实现信息的收发。关于第八方面或第九方面或各种可能的实施方式的技术效果，可参考对于第三方面或相应的实施方式的技术效果的介绍。
第十方面，提供一种通信系统，该通信系统包括第四方面或第五方面所述的地图生成装置、第六方面或第七方面所述的地图生成装置，还可以包括第八方面或第九方面所述的广播信号的播放装置。
第十一方面，提供一种计算机存储介质，所述计算机可读存储介质中存储有指令，当其在处理器上运行时，使得所述定位装置执行上述第一方面、第二方面、或第三方面任意一种可能的实施方式中所述的方法。
第十二方面，提供一种包含指令的计算机程序产品，所述计算机程序产品中存储有指令，当其在处理器上运行时，使得所述定位装置执行上述第一方面、第二方面、或第三方面任意一种可能的实施方式中所述的方法。
附图说明
图1a-图1b为现有技术中空中广播信号收发装置的结构示意图；
图2a为现有技术中网络广播系统的结构示意图；
图2b为现有技术中网络广播接收端设备的结构示意图；
图3a为本申请实施例适用的一种广播系统架构示意图；
图3b为本申请实施例提出的一种多媒体终端设备的结构示意图；
图4a-图4b为本申请实施例提出的一种广播信号强度图层的示意图；
图5a为本申请实施例提出的一种地图生成方法的流程图；
图5b为本申请实施例提出的广播信号强度图层的生成过程示意图；
图6为本申请实施例提出的第一种广播信号播放方法的流程图；
图7a为本申请实施例提出的第二种广播信号播放方法的流程图；
图7b为本申请实施例提出的第二种广播信号播放方法的应用场景示意图；
图7c为本申请实施例提出的第二种广播信号播放方法使用的广播信号强度图层示意图；
图7d为本申请实施例提出的第二种广播信号播放方法的示意图；
图8a为本申请实施例提出的第三种广播信号播放方法的流程图；
图8b为本申请实施例提出的第三种广播信号播放方法的应用场景示意图；
图8c为本申请实施例提出的第三种广播信号播放方法使用的广播信号强度图层示意图；
图9为本申请实施例提出的第一种地图生成装置的结构示意图；
图10为本申请实施例提出的第二种地图生成装置的结构示意图；
图11为本申请实施例提出的第三种地图生成装置的结构示意图；
图12为本申请实施例提出的第四种地图生成装置的结构示意图；
图13为本申请实施例提出的第一种广播信号的播放装置的结构示意图；
图14为本申请实施例提出的第二种广播信号的播放装置的结构示意图。
具体实施方式
为了便于理解，对本申请实施例涉及的术语进行解释说明，该术语的解释说明也作为对本申请实施例的一部分。
1)终端设备，包括向用户提供语音和/或数据连通性的设备，例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音和/或数据。该终端设备可以包括用户设备(user equipment，UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device，D2D)终端设备、V2X终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端设备、物联网(internet of things，IoT)终端设备、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、远程站(remote station)、接入点(access point，AP)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如，可以包括移动电话(或称为“蜂窝”电话)，具有移动终端设备的计算机，便携式、袖珍式、手持式、计算机内置的移动装置等。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、等设备。还包括受限设备，例如功耗较低的设备，或存储能力有限的设备，或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification，RFID)、传感器、全球定位系统(global positioning system，GPS)、激光扫描器等信息传感设备。
本申请中，终端设备还可以是车载装置，例如车载单元(on board unit，OBU)，一般安装在车辆上，在ETC系统中，路边架设路侧单元(road side unit，RSU)，OBU可以与RSU进行通信，例如可以通过微波来通信。在车辆通过RSU时，OBU和RSU之间可以使用微波进行通信。在电子收费(electronic toll collection，ETC)系统中，OBU采用专用短距离通信(dedicated short range communications，DSRC)技术，与RSU建立微波通信链路，在车辆行进的途中，在不停车的情况下，可以实现车辆的身份识别或电子扣费等过程。或者，除了OBU之外，车载装置也可以是其他的安装在车上的装置。例如，如下介绍的各种终端设备，如果位于车辆上(例如放置在车辆内或安装在车辆内)，都可以认为是车载装置，或者称为车载装置。本车车载系统可以至少包括车辆、车载网络、以及车载装置。车载装置包括各种传感器、GNNS接收模块等。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
2)电子地图，也称为数字地图，是利用计算机技术，以数字方式存储和查阅等的地图。例如，导航地图和高精度地图。导航地图，是面向驾驶员使用的地图数据，是一种提供道路级导航功能的电子地图(或数字地图)，具有地图显示、位置定位、道路引导的功能。通常精度达到米级。高精度地图，是面向自动驾驶汽车使用的地图数据(含车道、道路、交通标志牌、交通信号灯、定位图层等信息)，是一种提供高精度的定位功能、道路级和车道级的规划和引导功能的电子地图。高精度地图的精度可以达到厘米级。不仅有高精度的坐标信息，同时还有准确的路况信息，例如车道的长宽、坡度、曲率等数据。电子地图可以存储在地图服务器中，也可以存储于车载装置或路侧装置中，在此不做限定。存储有高精度地图的地图服务器可以将这些目标位置(或地物位置)传递给具有自动驾驶或辅助驾驶功能的车辆(“ego-car”)，可以提高车辆的安全顺畅的自动驾驶体验。
3)本申请实施例中的术语“系统”和“网络”可被互换使用。“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，可以表示：a,b,c,a-b,a-c,b-c,或a-b-c，其中a,b,c可以是单个，也可以是多个。
以及，除非有相反的说明，本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的顺序、时序、优先级或者重要程度。例如，第一道路和第二道路，只是为了区分不同的道路，而并不是表示这两种道路的优先级或者重要程度等的不同。
下面将结合附图，对本申请实施例进行详细描述。
广播是用户在开车过程中使用最频繁的服务之一，当前车载收音机的信号源主要有2种：一种是空中广播，另一种是基于互联网的网络广播。
图1a示例性地示出了空中广播的信号发送端的示意图，图1b示例性地示出了空中广播的信号接收端的示意图。
如图1a所示，在空中广播的信号发送端，声音信号被转换为低频电流，该低频电流经过声音放大器进行信号放大处理，经过调变处理得到调变波(调变处理是将声音信号附着于高能量载波的过程)，再经过高频放大器进行放大处理，最后通过天线发射出去。
空中广播的信息实时性好，且用户不需要额外付费；但是，FM信号受建筑物或地形影响较大(例如隧道、地下停车场、偏远山区等位置信号差)。
如图1b所示，在空中广播的信号接收端，通过天线接收无线广播信号，该信号通过声音放大器进行放大处理，经过调谐器对调频广播信号解调，经过检波器的检波处理，再经过低频放大器将信号转换成音波，最终通过扬声器播放。
图2a示例性地示出了网络电台的信号发送端的示意图，图2b示例性地示出了网络电台的信号接收端的示意图。
如图2a所示，网络电台可采用IP网络广播系统实现。IP网络广播系统是一套基于网络传输的广播系统，通信协议采用TCP/IP网络协议，借助网络(如局域网或广域网)进行通信和传输广播音频信号。IP网络广播系统的工作原理概括来说包括两个方面：第一：采用TCP/IP网络协议，利用网络进行通信和传输广播音频信号；第二：数模转换，先把模拟的广播音频信号转换成数字音频信号，再把数字音频信号压缩成可以在网络上传输的数据包，再通过网络进行传输到目的区域。如图2b所示，在目的区域，接收端的解码器接收网络数据包，再把数字音频信号转成模拟音频信号输出给功放设备，功放设备放大音频信号再由扬声器发音。
由于网络电台可以依托广泛覆盖的移动网络，覆盖区域广，信号稳定。但是，网络电台的广播内容有延迟，并且受网络带宽和网速的限制，另外，收听网络电台的广播，需要支付移动网络流量费用。
单一广播信源存在各自的优缺点，若可以综合两种信源的优势，实时监测FM信号强度和网络信号强度，可以实现在不同区域使用不同信源，完成FM和网络广播信源之间的切换，为用户提供更好的广播收听体验。例如，可以在FM信号稳定的区域，接收FM信号，收听广播。电台应用实时监测FM信号强度，车辆进入隧道等特殊区域时，FM信号强度变弱，当FM信号强度低于某个阈值，并且网络广播信号强度稳定时，电台应用自动将信号源切换为网络广播。当车辆驶离特殊区域，电台应用监测到FM信号强度高于强度阈值后，再次将信号源从网络广播切换为FM。但是，由于监听FM信号由强变弱或由弱变强，需要一定的检测期，在时间窗内，可能由于FM信号不稳定，导致用户收听到的广播质量较差，存在音频卡顿或模糊等问题。另外，由于FM和网络广播存在时延(FM要“快”于网络广播)，从FM信号直接切换到网络广播信号时，用户会重复收听一段广播；从网络广播信号直接切换到FM信号时，用户会漏听一段广播。总之，硬切换的方法，存在音频跳变问题，影响收听效果。
基于上述问题，本申请提供一种基于地图图层的广播信号的播放方法，可以保障信源切换过程中，用户收听的音频质量稳定且连续，无需用户手动切换，提高用户收听广播的效果。本申请实施例提供的地图的构建及广播信号的播放方法，可以用于网联车系统中。 网联车系统中的车辆可以应用传统地图和高精度地图实现广播收听服务。本申请实施例所述的广播收听服务还可以在自动驾驶、辅助驾驶的业务过程中实施。本申请实施例提供的地图构建及广播信号的播放方法，还可以应用于车辆与其他装置的通讯(vehicle to x，V2X)业务，V2X如车车通讯(vehicle to vehicle，V2V)、车路通讯(vehicle to installation，V2I)等，在此不做限定。
本申请实施例可应用于如图3a所示的系统架构。如图3a所示，本申请实施例适用的一种可能的通信系统的架构示意图。通信系统包括：终端设备101、网络设备102、接入设备105、流媒体服务器103(或IP网络广播服务器)、无线电广播信号发射机104、地图服务器106、(可以包括地图服务器和定位服务器等)。
其中，无线电广播信号发射机104可以将电台信号源提供的音频信号调制为无线电广播信号进行发射。流媒体服务器103(或IP网络广播服务器)可将电台信号源提供的广播电台音频信号(模拟信号)转换为数字音频信号，并通过网络传送。该流媒体服务器103可以是一个设备也可以是一组设备构成的流媒体服务器系统，以实现上述功能。终端设备101具有空中广播的信号接收和播放功能，终端在空中广播工作模式下，可接收无线电广播信号发射机发送的无线电广播信号并进行播放，在网络电台工作模式下，可接收通过网络传送的音频数字信号并进行播放。也即具有收音机功能，还具有网络信号(比如蜂窝网信号、局域网信号)接收和处理功能(比如播放器功能)。
应理解，图3a仅为通信系统的一个架构示意图，本申请实施例中对通信系统中网络设备102的数量、接入设备105的数量、终端设备101的数量不作限定，而且本申请实施例所适用的通信系统中除了包括网络设备102、接入设备105、地图服务器和终端设备101以外，还可以包括其它设备，如核心网设备、无线中继设备和无线回传设备等，在一些场景下，也可以认为网络设备102为一种特殊的核心网设备，网络设备102是否属于核心网并不影响本申请实施例的实现，本申请实施例对此并不作限定。图3a中，终端设备101可以通过无线方式与接入设备105连接，通过接入设备105建立与网络设备102之间的通信链接。终端设备101可以不止一个，终端设备101件可以通过无线方式与接入设备105连接，通过接入设备105建立终端设备101间的通信连接。终端设备101也可以通过有线方式，建立终端设备101件的通信连接，在此不做限定。在本申请实施例中，对各种设备之间的数量关系并不作限定，例如，可以有多个终端设备与同一个接入设备进行通信，也可以有多个接入设备与同一个网络设备进行通信等等。上述系统架构适用的通信系统包括但不限于：时分双工-长期演进(Time Division Duplexing-Long Term Evolution，TDD LTE)、频分双工-长期演进(Frequency Division Duplexing-Long Term Evolution，FDD LTE)、长期演进-增强(Long Term Evolution-Advanced，LTE-A)，以及其他演进的各种无线通信系统，例如5G NR通信系统，或为了演进的各种无线通信系统。本申请实施例中，接入设备105可以是能和终端设备通信的设备，如接入设备可以是任意一种具有无线收发功能的设备。包括但不限于：基站(例如，基站NodeB、演进型基站eNodeB、5G通信系统中的基站gNodeB、未来通信系统中的基站或网络设备、WiFi系统中的接入节点、无线中继节点、无线回传节点)等。接入设备还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器。接入设备还可以是小站，传输节点(transmission reference point，TRP)等。当然本申请不限于此。在本申请实施例的后续表述中，终端设备101与网络设备102之间的任一信息传输，皆包括了终端设备101与网络设备102借助接入设备105实现信息传输的 含义，本申请实施例对此不再赘述。在本申请实施例中，终端设备101是一种具有无线收发功能的设备，终端设备101可以向网络设备102发送请求，以及从网络设备102获取数据。终端设备101通过地图模块实现定位功能，如无人车、机器人等智能终端，或用于实现无人驾驶功能的车载终端，也可以为手机、平板电脑、车载导航终端等。
在本申请实施例中，地图服务器106可以是具有较大存储空间的单台服务器，也可以是由多个服务器构成的服务器集群，更可以是具有超大存储空间的云服务器。地图服务器通常部署在一个或多个固定位置。如图3a所示，地图服务器与网络设备102之间存在虚线连接，表示地图服务器与网络设备102可以通过核心网进行数据交互。
地图服务器中可以存储有地图数据，由于地图服务器的存储空间足够大，因此可以存储较大覆盖范围内地图数据。在本申请实施例中，地图服务器中的地图可以包括多个区域，每个区域对应有标识。例如，可以按照行政区域(如区、县)划分将地图划分为多个区域，在此情况下，每个区、县的名称可以作为该区域的标识。在另一种可能的实现方式中，可以以预设区域面积为单位将地图划分为多个规则的区域。本申请中，还可以按照广播电台的覆盖区域划分，广播电台有国家台、省台、市区台等各种类别，分别覆盖不同的地理区域。例如，以900平米为单位将地图栅格化划分为多个规则的区域，并为每个区域设置对应的标识。可以理解，所划分的区域也可以为其它形状，本申请实施例对此并不多作限定。
本申请实施例中，地图服务器存储的地图数据，还包括有广播信号图层的地图数据，广播信号图层可以是基于不同的频点设置的图层，也可以是基于一个频段设置的图层，在此不做限定。广播信号图层中的地图数据也可以根据区域进行划分，下面详细描述，在此不再赘述。
如图3b所示，在终端设备101为车辆的车载终端设备时，车辆对应的多媒体系统结构图的一种示例，可以包括：用户界面、地图模块、定位系统、广播系统、传感器模块等。其中，广播系统可以包括广播信号收发模块、媒体处理模块、音频输出模块、网络模块、处理模块等。广播信号收发模块可以用于接收FM广播数据、检测FM广播的信号等功能，还可以用于接收网络广播数据。媒体处理模块，可以对广播信号的媒体流进行处理，完成广播信号的缓存，及对广播信号中的音频数据进行声纹对比，从而确定不同广播信号中播放的音频内容等功能。音频输出模块，用于为用户播放媒体处理模块缓存的音频流数据。网络模块，用于监听移动网络信号的强度，从而确定是否进入移动网络的覆盖范围内，以确定是否可以接收网络广播数据。传感器模块，用于采集车辆的行驶信息，从而确定车辆的速度、车辆当前行驶状态，车辆行驶的路况等信息。处理模块，用于对广播信号的切换进行决策。处理模块可以与终端的其他处理模块集成在一起，也可以是为广播系统单独设置的处理模块，在此不做限定。具体处理过程在后续详细描述。
另一种可能的实现方式，终端设备101可以为手机等非车载终端设备，终端设备101可以包括用户界面、地图模块、广播系统。
再一种可能的实现方式，终端设备101可以包括手机等非车载终端设备，和车辆的车载终端设备，此时，地图模块和广播模块可以分别设置于不同的终端设备上，例如，地图模块可以设置于手机等非车载终端设备上，广播模块可以设置于车辆的车载终端设备上。或者，地图模块可以设置于车载终端设备上，广播模块可以设置于非车载终端设备上。地图模块和广播模块可以与终端设备101的处理器建立通信链接，从而，处理器可以接收到地图模块的地图数据和广播模块的广播信号数据，确定是否切换广播信号的类型，并控制 广播模块以实现广播信号的类型的切换。
其中，各个模块实现的具体功能具体如下：
用户界面，可以实现多媒体系统与用户之间的信息交互。例如，当用户在出行过程中需要收听广播时，多媒体系统会在用户界面弹出显示界面，用于提示用户在用户界面输入收听的广播电台，从而响应于用户选择的广播电台的操作，对该广播电台的信号进行播放。用户界面中还可以包括广播信号的类型的设置界面，使得用户可以对广播信号的类型进行设置。例如，广播信号的类型可以包括FM广播或者网络广播。进一步的，广播信号的类型的设置界面还可以设置广播信号的类型的场景。例如，在场景一中，终端的可用网络流量满足网络广播所需的流量，此时可以设置为基于FM广播信号的类型和网络广播信号的类型任一种收听广播，从而，在终端确定当前的广播信号为FM广播信号较好时，选择播放FM广播，在确定FM广播信号质量较差，且网络广播信号较好时，选择播放网络广播。通过终端确定广播信号的类型的切换，使得用户对广播信号的类型的切换无感知，提高用户在移动过程中，收听广播的流畅度。在场景二中，终端的网络流量不足，或者终端处于低功耗状态，则可以切换为仅通过FM广播信号的类型收听广播。在场景三中，例如，终端处于FM信号差的区域，可以切换为仅基于网络广播信号的类型收听广播。
进一步的，用户界面还可以显示车辆的提示信息，例如，还可以根据用户需要，在用户界面展示出多媒体系统当前播放的广播信号的类型。再例如，基于用户对网络广播的流量的设置，终端可以在用户的网络流量满足预设阈值时，在用户界面为用户显示提示信息，以使用户确定是否需要将网络广播的模式切换为FM广播的模式。
定位系统，可以是GPS系统，也可以是北斗系统或者其他定位系统，可用于估计终端设备的地理位置，也可以用于接收定位服务器发送的终端设备的位置信息。举例来说，若终端设备101为车载设备，则该定位模块可以设置在汽车上，或者说该定位模块为一种车载设备。在该定位模块被设置在汽车上时，具体的，该定位终端可以设置在车顶，也可以设置在其他需要定位的位置。若终端设备101为手机等非车载设备，定位模块可以设置于手机等非车载设备上。终端设备101上的定位模块可以向定位服务器发送定位请求，并接收定位服务器返回的定位模块的位置信息。
地图模块获取的终端设备的位置信息可以是终端设备根据定位系统确定的。定位系统可以通过GNSS定位方法，确定终端设备的定位置，定位系统还可以包括核心网中的定位网元，在5G通信系统中，定位网元可以是核心网中的业务能力开放(service capibility exposure function，SCEF)网元，和/或，定位服务器。在一种可能的实现方式中，SCEF网元可以从定位服务器获取终端设备101的位置信息。定位服务器可以采用基于小区标识(Cell ID)的定位方法、基于到达时间差(time difference of arrival，TDOA)的定位方法、基于到达角度(angle of arrival，AOA)的定位方法等方法中的一种或几种对终端设备进行定位，从而获取终端设备的位置信息。具体的，定位服务器可以是增强服务移动定位中心(enhanced serving mobile location centre，E-SMLC)网元，和/或，网关移动位置中心(Gateway Mobile Location Center)，或者，具有类似功能的一个或多个网元，本申请实施例对此并不多做限定。应理解，本申请实施例中定位服务器与网络设备102既可以属于同一台物理设备，也可以分别属于不同的物理设备。
地图模块，可以存储有导航地图数据，相对于高精度地图来说，导航地图只提供道路级的导航信息。导航地图可以为用户提供导航信息，满足开车路线的导航需求。例如，导 航地图可以提供当前道路有几条车道、限速信息、转弯信息、路线规划等导航信息。本申请实施例中，导航地图中还可以包括广播信号强度图层，用于提供当前地理位置下可以接收到的广播信号的强度信息。
地图模块，还可以用于存储高精度地图的车道级别道路信息。高精度地图可以以地图文件的形式进行存储，高精度地图的地图文件主要包括几何信息和属性信息。其中，几何信息即车道信息的空间坐标，即车道信息的位置。属性信息可以基于图层的属性确定。例如，若该地图的图层为车道图层，则属性信息为车道信息属性的信息，如本车道是主路车道还是辅路车道；本车道是直行车道、右转车道、左转车道还是其他车道等。若该地图的图层为广播信号图层，则属性信息为广播信号的强度信息。
地图模块，还可以用于接收地图服务器发送的地图数据。一种可能的实现方式，终端设备101中可以安装有广播应用或地图应用，从而，终端设备101可以通过广播应用或地图应用与后端的地图服务器采用互联网进行通讯，以获得地图数据。例如，FM信号强度图层信息。当然，也可以为周期性更新地图模块中的地图数据，在此不做限定。对地图的更新方式也可以由终端或地图服务器来执行。例如，通过地图服务器更新的方式，可以为终端采集的广播信号的强度信息，并发送到地图服务器，由地图服务器来确定最新的广播信号强度的范围。地图服务器可以主动向终端设备发送更新的地图，也可以根据终端设备发送的查询请求，返回地图对应更新的广播信号强度的范围。
在具体实施过程中，可以在收听广播的过程中，发送对应区域的地图数据，以节省终端设备101需存储的地图数据，也可以为地图服务器预先下发多个区域的地图数据。另外，更新的方式也可以是根据地图数据的更新的需要，对地图模块中的地图数据进行更新。
传感器模块，可包括感测关于车辆周边的环境的信息的若干个传感器。例如，传感器系统可包括定位系统、惯性测量单元(inertial measurement unit，IMU)、雷达、激光测距仪以及相机。IMU用于基于惯性加速度来感测车辆的位置和朝向变化。在一个实施例中，IMU可以是加速度计和陀螺仪的组合。雷达可利用无线电信号来感测车辆的周边环境内的物体。在一些实施例中，除了感测物体以外，雷达还可用于感测物体的速度和/或前进方向。激光测距仪可利用激光来感测车辆所位于的环境中的物体。在一些实施例中，激光测距仪可包括一个或多个激光源、激光扫描器以及一个或多个检测器，以及其他系统组件。相机可用于捕捉车辆的周边环境的多个图像。相机可以是静态相机或视频相机。进一步的，车辆还可以包括计算机视觉系统，可以操作来处理和分析由相机捕捉的图像以便识别车辆周边环境中的物体和/或特征。所述物体和/或特征可包括交通信号、道路边界和障碍物。计算机视觉系统可使用物体识别算法、运动中恢复结构(Structure from Motion，SFM)算法、视频跟踪和其他计算机视觉技术。在一些实施例中，计算机视觉系统可以用于为环境绘制地图、跟踪物体、估计物体的速度等等。
下面详细介绍本申请实施例提供的地图的构建方法。如图4a和图4b所示，本申请实施例设计的地图是在传统地图的基础上，增加广播信号强度图层，用于表示不同位置上的广播信号强度信息。一种可能的实现方式，可以通过不同的颜色或亮度表示相应位置的广播信号强度值，例如，如图4a所示，图中的圆点对应地图的地理位置，圆点上可以采用不同的灰度表示相应的广播信号强度值，颜色越深表示信号强度越强，颜色越浅表示信号强度越弱。
另一种可能的实现方式，广播信号强度信息在图4b中用类似地形图中等高线的方式 示意。所述广播信号强度图层用于表示以所述第一调制频率调制的广播信号的第一强度范围所对应的第一覆盖区域范围。所述广播信号强度图层还用于表示以所述第一调制频率调制的广播信号的第二强度范围所对应的第二覆盖区域范围。所述广播信号强度图层还用于表示以不同于所述第一调制频率的第二调制频率调制的广播信号的第三强度范围所对应的第三覆盖区域范围。通过广播信号强度图层，可以得到某一位置上的某一调制频率的广播信号强度所处的范围区间。如图4b所示，使用闭合的不规则曲线表示某一广播信号强度范围对应的地理范围边界，如曲线Ⅰ表示区域A的地理范围边界，在区域A之内，FM广播信号强度大于第一阈值，在区域A之外，FM光线信号强度小于第一阈值。在曲线I上，FM广播信号强度等于第一阈值。在区域A之内，终端可以接收到较好的FM广播信号，即收听质量较好。曲线Ⅱ表示区域C的地理范围边界，在区域C之内，FM广播信号强度大于第二阈值，在区域C之外，FM广播信号强度小于第二阈值。在曲线II上，FM广播信号强度等于第二阈值。在区域C之内，终端可以接收到较好的FM广播信号，即收听质量较好。曲线III表示区域D和区域A组成的地理范围边界，在区域D之内，FM广播信号强度大于第三阈值，在区域D之外，FM广播信号强度小于第三阈值。在曲线III上，FM广播信号强度等于第三阈值。第一阈值大于第三阈值。即，在区域D之内，终端接收到的FM广播信号的强度相比区域A有所下降，收听质量降低。图4b中，虚线组成的区域B表示FM广播信号低于第三阈值和第二阈值的部分区域。例如，可以表示为在区域B内，FM广播信号的强度较弱，难以收听到FM广播信号，或者收听质量较差。根据广播信号强度的变化趋势线，还可以添加梯度线(例如，图4b中的箭头，表示FM广播信号强度由强变弱)。广播信号强度图层为终端在收听广播的过程中进行广播信号源切换的时机提供参考。例如，车辆即将驶入FM信号弱的区域或者驶离FM信号弱的区域。典型的FM广播信号由强变弱场景为移动终端进入隧道或室内等。
如图5a所示，本申请提供的包括广播信号强度图层的地图的生成方法的具体步骤如下所述，包括：
步骤501：服务器执行广播信号强度图层的初始化。
以调频广播为例，对至少一个调制频率下的广播信号的强度范围所对应的覆盖区域范围进行初始化设置，确定每个广播信号的强度范围所对应的预设覆盖区域范围。
一种可能的实现方式，可以根据地理信息，划分所述预设覆盖区域范围的边界。例如，可以根据行政区划分预设覆盖区域范围边界。另一种可能的实现方式，可以按照广播电台的覆盖区域划分外边界。例如，广播电台有国家台、省台、市区台等各种类别，分别覆盖不同的地理区域范围。如果是国家台和省台，直接将预设覆盖区域范围的边界设置为国界线和省界线。如图5b中的(a)所示，如果是市区台，将边界设置为以城市中心为圆心，城市平均半径为半径的圆形曲线。再一种可能的实现方式，可以根据区域的属性，例如隧道、室内等信息，设置所述预设覆盖区域范围的边界。如图5b中的(a)所示，将区域内的隧道、地下停车场、楼宇等已知的FM信号覆盖弱区域，预先标记为较弱的强度范围所对应的预设覆盖区域。当然，还可以是根据其他方法设置的广播信号强度范围的边界，在此不做限定。
步骤502：终端确定第一信息。其中，第一信息可以包括终端的定位位置、终端在所述定位位置接收的以第一调制频率调制的广播信号的强度和第一调制频率。以终端记录的一次第一信息为例，可包括但不限于如下内容：
(1)检测终端在第一定位位置接收的广播信号强度的时间。
(2)检测的广播信号强度。例如，FM广播电台频段上的信号强度，或者网络广播频段上的信号强度。
(3)FM广播电台频段信息，或者网络广播频段信息。例如，FM广播电台信号所在的波段，或者网络广播信号频点、流媒体服务器IP地址等信息；
(4)终端的第一定位位置。例如，终端测量广播信号强度时终端所在的定位位置的位置信息，该位置信息可以是经纬度信息，也可以是蜂窝小区的小区标识信息或者其他能够表达终端所在位置的信息。该信息可以通过终端的全球定位系统(Global Positioning System，GPS)定位功能获得并上报，终端也可将其所在的蜂窝小区的标识进行上报，服务器可以根据终端上报的位置信息，通过查询相应位置信息(比如经纬度或小区标识)与城市的对应关系，获得终端所在的区域或城市。由于不同城市可能具有不同的电台，其无线电广播信号发射机或者流媒体服务器的部署情况也可能有所不同，因此获得终端所在的城市，可以将其作为确定广播信号图层中广播信号的强度所对应的覆盖范围的依据之一；
(5)终端在测量广播信号强度前后设定时间段内的的运动状态信息。比如，在测量广播信号强度的前后5分钟之内终端的运动速度等信息。对于车载终端，运动状态信息可以通过设置在车辆上的传感器获得。
(6)终端在测量广播信号强度前后设定长时间段内的环境信息。比如，在发生测量广播信号强度前后的一段时间内的天气情况等信息。
终端上报时，可上报上述多种种类的信息中的一种或多种组合。
一种可能的实现方式，终端设备可以在定位位置发生变化时，或者广播信号的强度发生变化时，或者，广播信号的调制频率发生变化时，确定第一信息。
下面以场景a1-场景a3举例说明确定第一信息的场景。
场景a1，终端设备在移动过程中，持续接收广播信号，此时，可以基于终端设备的定位位置的变化大于预设距离，例如，当终端设备的定位位置的变化大于1m，向地图服务器发送第一信息。
在该场景下，无论广播信号的调制频率或者广播信号的强度是否发生变化，都可以向地图服务器发送第一信息，使得地图服务器获得不同位置下的广播信号的强度分布。当然，为节省终端上报第一信息所占用的网络开销，还可以是在播信号的调制频率发生变化时，例如，响应于用户对广播电台频道的切换，终端设备在确定定位位置发生变化时，向地图服务器发送第一信息。或者，仅在广播信号的强度发生变化，且终端的定位位置也发生变化时，才向地图服务器上报第一信息。
场景a2，终端设备持续接收广播信号，确定广播信号的强度由强变弱或由弱变强时，向地图服务器发送第一信息。具体的，终端设备可以根据广播信号的强度的变化大于预设阈值时，向地图服务器发送第一信息。
一种可能的场景下，终端设备的定位位置和广播信号的调制频率没有发生变化，只有广播信号的强度发生变化，此时终端设备上报的第一信息中，可以包括发生变化后的广播信号强度的相关信息，还可以包括发生变化前的广播信号强度的相关信息。例如，终端设备在第一定位位置上，接收第一调制频率的第一广播信号，终端设备在第一时刻测量到的第一广播信号的强度值为第一强度值，及在第二时刻测量到第一广播信号的强度值为第二强度值。此时，终端设备可以将第一时刻测量到的第一强度值和第二时刻测量到的第二强 度值都上报，以使地图服务器获取到不同时间对应相同定位位置上的广播信号强度。
另一种可能的场景下，终端设备的定位位置和广播信号的强度同时都发生了变化，则终端设备可以基于发生变化后测量到的广播信号强度的相关信息，作为第一信息，上报给地图服务器。也可以基于发生变化前的最后一个时刻测量到的广播信号强度的相关信息，作为第一信息，上报给地图服务器。
结合图4b所示，例如，终端设备在第一定位位置(例如，位置4010)上，接收第一调制频率的第一广播信号，终端设备在第一时刻测量到的第一广播信号的强度值为第一强度值，终端设备在从第一定位位置(时刻1)移动至第二定位位置(例如，位置4020，时刻2)的过程，经历了第一时段，测量到的第一广播信号的强度值在第一强度范围之内。在第一强度范围内，可以认为广播信号的强度范围变化不大，可以不上报给地图服务器。
当终端设备从第二定位位置(时刻2)移动至第三定位位置(例如，位置4030，时刻3)，接收第一调制频率的第一广播信号，测量到第一广播信号的强度值为第三强度值。以终端设备确定广播信号强度增大为例，终端设备确定第三强度值与第一强度范围的最大值的差值大于第一预设阈值，则可以将时刻3测量到的广播信号强度的相关信息，作为第一信息，上报给地图服务器。同样的，以终端设备确定广播信号强度减弱的方式为例，终端设备确定第三强度值与第一强度范围的最小值的差值大于第二预设阈值，则可以将时刻3测量到的广播信号强度的相关信息，作为第一信息，上报给地图服务器。
考虑到在第一时段的最后一个时刻对应的第二定位位置可能是广播信号强度在第一强度范围的边界，因此，终端也可以将第一时段的最后一个时刻(例如，时刻2)对应第二定位位置广播信号强度的相关信息，作为第一信息，上报给地图服务器。
场景a3，终端设备确定广播信号的调制频率发生变化，则将第一信息上报给地图服务器。
响应于终端切换电台的调制频率的操作时，终端设备可以在切换调制频率后，获得终端的定位位置，及对切换调制频率后的广播信号进行测量，从而确定广播信号的强度。例如，在从第一调制频率切换至第二调制频率的情况下，测量第二调制频率的广播信号的强度。同时，还可以确定终端在切换第二调制频率后的定位位置，进而确定第一信息。
步骤503：终端向服务器发送第一信息。
一种可能的实现方式，终端设备可以在确定第一信息时，即向地图服务器发送第一信息。例如，可以采用众包模式向地图服务器发送第一信息。
另一种可能的实现方式，终端也可将每次确定的第一信息保存在终端本地，并按照设定周期或设定时间或是其他上报策略(比如当网络性能较好的情况下，或者终端为空闲态时进行上报，避免影响终端执行其他事件的性能)的规定，在合适的时间将保存的广播信号发送变化的相关信息通过网络上报给服务器。
步骤504：云服务接收到强度数据和位置数据后，对多个第一信息进行训练，确定广播信号的强度范围所对应的覆盖区域范围。
其中，多个第一信息可以是来自于一个终端的多个第一信息，还可以来自多个终端，在此不做限定。训练的方式可以是在线训练，也可以是离线训练，在此不做限定。训练的频率可以根据接收到的第一信息的数量确定，也可以根据预设时间确定。
举例来说，训练过程可以包括：
步骤5041：确定训练数据。
为提高训练效率，可以根据预设的覆盖区域范围，分区域训练。该覆盖区域范围可以是一个广播信号的强度范围所对应的至少一个覆盖区域范围，也可以是多个广播信号的强度范围所对应的至少一个覆盖区域范围。此时，可以根据第一信息中的所述定位位置，确定在预设的覆盖区域范围内的第一信息，作为训练该预设的覆盖区域范围内的训练数据。另外，还可以根据第一信息中测量广播信号强度的时间，分时段训练。当然，可以基于训练数据的实际情况确定训练数据，在此不做限定。
进一步的，为提高训练效果，还可以根据终端上报的第一信息的测量精度(测量精度可以包括定位位置的测量精度，还可以包括对广播信号的强度的测量精度，在此不做限定)，对多个第一信息确定优先级，从而对多个第一信息进行筛选。例如，可以根据终端上报的第一信息的测量精度，确定低、中、高优先级，优先采用高优先级的第一信息作为训练数据进行训练。
步骤5042：根据训练数据，确定不同广播信号的强度范围所对应的覆盖区域范围。
一种可能的实现方式，可以根据所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
具体的，可以针对训练数据中广播信号的强度在第一强度范围内对应的多个第一信息，作为确定广播信号的第一强度范围的第一覆盖区域范围的边界。
例如，假设在预设第一覆盖区域范围内存在100个训练数据，基于第一强度范围[20,30]db内的训练数据有20个，若第一覆盖区域范围的边界设置为25db，则可以根据该20个训练数据对应的定位位置，确定出广播信号强度为25db的边界。如图5b中的(b)所示，在第一覆盖区域范围内接收了多个终端(图中为圆形图标对应的车辆为上报第一信息的车辆，图中为矩形图标对应的车辆为不上报第一信息的车辆)上报的第一信息。
另一种可能的实现方式，根据所述多个第一信息中所述终端在所述定位位置接收的广播信号的强度分别与预设的第一强度阈值进行比较得到的多个比较结果，以及所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
例如，假设在预设第一覆盖区域范围内存在100个训练数据，根据所述100个训练数据中100个广播信号的强度值分别与预设的第一强度阈值进行比较，确定等于第一强度阈值的30个训练数据，可以根据该30个训练数据中的30个定位位置，确定第一覆盖区域范围的边界，并根据剩余的70个训练数据中，确定70个广播信号的强度值中小于第一强度阈值的24个训练数据，及大于第一强度阈值的46个训练数据，修正第一覆盖区域范围的边界。如图5b中的(c)所示，可以是基于图5b中的(b)所示的训练数据训练后的第一覆盖区域范围的边界。
上述举例是基于广播信号为同一调制频率下生成的广播信号图层，针对不同调制频率，可以生成不同的广播信号图层，以第二调整频率为例，服务器可以根据终端上报的多个第二信息，生成所述广播信号强度图层。其中，每个所述第二信息包括终端的定位位置、所述终端在所述定位位置接收的以第二调制频率调制的广播信号的强度和所述第二调制频率。
针对不同调制频率生成的不同的广播信号图层，也可以合并为一个广播信号图层。即所述广播信号强度图层可以用于表示第一调制频率调制的广播信号的至少一个强度范围 所对应的至少一个覆盖区域范围，还可以用于表示以所述第二调制频率调制的广播信号的至少一个强度范围所对应的至少一个覆盖区域范围。
如图6所示，本申请提供的第一种广播信号的播放方法的具体步骤如下所述。例如：可以由终端来采集定位位置和广播信号强度等信息，并发送到云端服务器，由云端服务器来确定广播信号的切换；还可以是由终端确定广播信号的切换。下面以终端确定广播信号的切换为例进行说明，主要流程可以包括以下几个步骤：
步骤601：终端接收来自服务器的广播信号强度图层。
其中，所述广播信号强度图层属于地图图层，所述广播信号强度图层用于表示广播信号的强度等级所对应广播信号的覆盖范围。
步骤602：根据所述终端的当前定位位置、所述终端的当前运动状态、所述终端的未来行驶路径和所述广播信号强度图层，确定第一时刻。
终端在第一时刻之前，所述终端处于所述第一状态时以单倍速率播放接收的所述第一广播信号。以第一广播信号FM信号为例，在第一状态时，终端可以认为处于FM信号的稳定区域，终端接收的FM信号，可以通过终端的播放器以1.0倍速正常播放接收到的第一广播信号的音频。
步骤603：在第一时刻，终端从仅接收第一广播信号的第一状态切换为同时接收第一广播信号和第二广播信号的第二状态。其中，第一广播信号和第二广播信号的类型不同。
其中，终端的当前运动状态可以包括终端的移动方向、终端的移动速度或加速度等信息。从而，终端可以根据终端的当前定位位置和终端的当前运动状态，确定出终端的未来行驶路径。或者，终端还可以基于导航地图为终端规划的行驶路径获得终端的未来行驶路径，在此不做限定。
例如，如图7c所示，以终端为车辆为例，终端当前的定位位置为位置710，终端的当前运动状态为直线行驶，终端的未来行驶路径为虚线所示的行驶路径700，从而根据终端的运动状态中的终端的移动速度和加速度等运动信息，可以预测出在终端到达未来行驶路径700上的任一位置的时刻。
步骤604：终端处于第二状态时，接收第一广播信号和第二广播信号。
同时，终端处于第二状态时，可以播放接收的第一广播信号。
终端在进入第二状态时，考虑到第一广播信号与第二广播信号的类型不同，例如，FM信号源直接为发射塔直接发射的模拟信号，而网络广播信号源是通过移动网络转发后传输的广播信号，因此，第一广播信号与第二广播信号播放内容并不完全同步。若直接将第一广播信号切换至第二广播信号，则会出现漏听或重复收听的问题，严重影响用户体验。
一种可能的实现方式，终端可以基于第一广播信号和第二广播信号之间的时延，在播放第一广播信号时，插入其他音频内容。例如，若当前终端还存在导航播放，可以基于导航播放内容，在终端处于第二状态时，播放导航的相关内容，在播放导航的相关内容时，可以暂停播放第一广播信号，当确定第一广播信号与第二广播信号播放相同内容的时刻相同时，可以将该时间点作为播放第二广播信号的时间点。以完成第一广播信号到第二广播信号的切换。
举例来说，结合图7b，在第一时刻到达时，接收到的第一广播信号的音频帧为图7b中的白色块，接收到的第二广播信号的音频帧为图7b中的黑色块，若以单倍速率播放， 第二广播信号播放到音频帧为白色块的时刻，可以表示为初始时刻。因此，可以根据初始时刻和第一时刻确定第一广播信号与第二广播信号的时延，即时延△T满足：
△T＝T(初始时刻)-T(第一时刻)。
此时，可以在时间窗内插入与时延长度相同的音频内容，在播放完该音频内容的时间点，可以作为切换至第二广播信号的时间点，当然，也可以是在时间窗结束的时间点，作为切换为第二广播信号的时间点，在此不做限定。
另一种可能的实现方式，本申请中，终端可以将第一广播信号以非单倍速率的播放方式进行播放，从而，在时间窗内，通过对第一广播信号的变速播放，使得在变速播放结束后，第一广播信号播放的音频帧与接收到的第二广播信号的音频帧同步，以实现第一广播信号和第二广播信号的无缝切换，提高用户的收听体验。
结合广播信号强度图层，终端在第一时刻从第一状态切换为第二状态，以实现最终切换广播信号的方式可以基于不同的场景确定，下面以具体场景b1和b2举例说明。
在场景b1和场景b2中，考虑到网络广播信号需要消耗网络流量，且在FM广播信号较弱时网络广播信号可以满足广播的播放需要。因此，切换策略主要是基于FM广播电台的信号良好时，则优先选择FM广播信号的策略为例进行说明的。
在场景b1中，在FM广播信号较弱时，需切换至网络广播信号。
下面以终端当前播放第一广播信号，终端从第一广播信号较强的场景切换至第一广播信号较弱的场景为例进行说明。如图7a所示，为本申请提供的第二种广播信号的播放方法流程示意图。例如，当车辆由FM信号稳定区域进入FM信号较差的区域(比如进入隧道、停车场等)，需要将FM信号切换为网络广播信号，可以包括以下步骤：
步骤701：终端在第一时刻，从第一状态切换至第二状态。
此时，终端确定第一时刻需要满足以下条件：即将进入FM信号弱的区域且当前区域及预测的未来行驶区域网络广播信号良好。
在该场景下，终端需要从接收FM广播信号，切换为接收网络广播信号。如图7b和图7c所示，FM广播信号弱的区域为隧道区域(区域B中包括隧道)，此时，第一广播信号可以为FM广播信号，第二广播信号可以为网络广播信号。终端处于第一状态时，FM广播信号强度较强，可以仅接收FM广播信号，并播放接收到的FM广播信号。终端进入隧道时，FM广播信号强度较弱，即如图7b所示，终端处于第三状态时，可以仅接收网络广播信号，并播放接收到的网络广播信号。如果从第一状态直接切换为第三状态，由于FM广播和网络广播存在时延(FM广播要“快”于网络广播)，从播放FM信号直接切换到播放网络广播信号时，用户会重复收听一段广播。本申请中，为保证切换质量，提高用户体验，在第一状态与第三状态之间，增加第二状态。在终端处于第二状态时，继续接收FM广播信号，通过对接收到的FM广播信号进行缓存以实现慢于单倍速播放FM广播信号，同时还接收并缓存网络广播信号，在第二状态结束时，当前播放的FM广播信号与当前接收的网络广播信号达到同步，而后由第二状态切换为仅接收并播放网络广播信号的第三状态，实现无缝切换，提高用户的收听体验。
为实现上述方案，需要为终端设置第二状态对应的时间窗，该时间窗的起始时刻为第一时刻，结束时刻为第二时刻。
所述第一时刻和所述第二时刻可以基于广播信号的强度图层确定，如图7c所示，终端 当前定位位置为位置710，虚线表示终端未来可能的行驶路径700。位置711处的广播信号强度等于第一切换阈值，在位置711组成的第一覆盖区域范围(例如，区域D)内，FM信号强度高于第一切换阈值，终端离开第一覆盖区域范围，进入区域B时，FM信号较弱，需要切换为网络广播信号。因此，可以将位置711确定为需要切换广播信号的临界点位置(即由第二状态切换为第三状态的位置点，车辆运动到该位置点的时刻为所述第一时刻)。从而，一方面根据车辆当前运动状态、当前定位信息和地图信息预测车辆运动到位置点711的所述第一时刻，另一方面根据两种广播信号之间的时间迟滞量和FM广播信号的慢速播放速率确定第二状态对应的时间窗的时间长度，该时间窗的时间长度足够实现播放的FM广播信号与接收的网络广播信号达到同步，再进一步根据所述第一时刻和所述时间窗的时间长度确定所述时间窗的起始时刻(即由第一状态切换为第二状态的时间点，也即所述第一时刻)。
需要说明的是，终端可以通过比较接收到的FM广播信号和网络广播信号的声纹，确定两种广播信号之间的时间迟滞量。如图7b所示，终端在第一时刻(例如，时刻1)接收到第一广播信号的某一帧(图7b中的上行白色块)，在初始时刻(例如，时刻2)接收到第二广播信号的与所述某一帧相同内容的帧(图7b中的下行白色块)，可以确定出，第一广播信号与第二广播信号的时间差为(时刻1-时刻2)。此时，终端可以在第二状态下播放第一广播信号时，可以采用插播时间长度为时间差的其他音频信号的方式，或者，对第一广播信号进行慢速播放，以使终端在到达第二时刻时，将第一广播信号播放的音频帧(例如图7b中的上行方格纹块)与接收到的第二广播信号的音频帧(例如图7b中的下行方格纹块)同步。具体实施方式在下面详细描述，在此不再赘述。
考虑到终端到达位置711的第二时刻是基于终端的移动速度确定的，可能在移动过程中移动速度发生变化，因此，终端在移动过程中，例如，从位置710移动至位置712时，确定出的第二时刻可能发生变化。例如，如图7d所示，在位置710时，基于时刻0对应的位置710预测出的到达位置711的时刻为时刻01。在到达位置712时，此时，为时刻0’，由于终端的移动速度加快，预测出到达位置711的时刻为时刻02，时刻02早于时刻01，此时，需要重新基于时间窗的窗长和第二时刻(时刻02)，确定第一时刻，即此时确定出的第一时刻要早于在位置710时确定出的第一时刻。
还有一种可能的场景中，考虑到终端在移动过程中，可能经历了堵车或者多个红绿灯等场景，此时，终端实际到达位置711的时刻要远晚于在位置710时预测出的第二时刻(时刻01)，可能导致过早的进入第三状态，或者，过早的进入第二状态，造成不必要的浪费，甚至影响顺畅切换。
基于上述考虑，一种可能的实现方式中，可以基于终端的定位位置和运动状态，实时更新第二时刻，从而，基于更新后的第二时刻更新第一时刻。
为避免频繁更新第一时刻，另一种可能的实现方式中，在上述确定第二时刻的方案中，还可以基于道路的限速规则，确定出在终端从位置710移动至位置711所需的最小时长，或者，考虑在终端从位置710移动至位置711所需的最大时长，从而综合考虑确定出合适的时间窗长，以确定出第一时刻，避免终端过早或过晚进入第二状态。
步骤702：所述终端处于所述第二状态时接收以及缓存第一广播信号和第二广播信号，并以慢于单倍速率播放所述第一广播信号。
其中，所述第二广播信号相对于所述第一广播信号存在时延。
举例来说，结合图7b所示，在时间窗内，慢于单倍速率播放的倍速为0.x；可以将0.x设置为略小于1.0，且在用户不敏感范围内(例如，可以设置为±12％内的媒体速度变化)。或者，倍速还可以由用户预先设置。
在步骤702中，终端可以对比播放器当前播放的第一广播信号的音频声纹和接收到的网络广播的音频声纹，在确定当前播放的第一广播信号的音频帧与接收到的网络广播的音频帧为相同的内容时，确定第一广播信号和第二广播信号同步。此时，可以将第一广播信号慢于单倍速率播放后与第二广播信号的接收同步，称为第一同步，确定第一同步的时刻可以作为第二时刻。
网络广播音频相对FM音频的延迟时间差为△t1；时间窗(第一时刻至第二时刻)时长为△t2，在时间窗内，第一广播信号从第一时刻开始以慢速播放至同步时间点所需的时间为△t2，此时，第一广播信号播放器慢速播放的时间相比正常播放的时间差满足：
(1-0.x)×△t2
该时间差与时延△t1相等，即满足：
△t1＝(1-0.x)×△t2
一种可能的实现方式，可以基于车辆在时间窗的时间内的平均速度，确定时间窗的最小值。终端在时间窗内的平均速度可以基于地图信息，通过车况、路况和交通规则估算。以平均速度为v为例，最小时间窗对应的最小距离s需满足：
s＝△t2×v
从而，可以确定s满足：
s＝(△t1/(1-0.x))×v。
如图7b所示，基于广播信号强度图层确定的对应于第二时刻的第二位置，该位置为必须完全切换为接收网络广播信号的位置，否则会影响广播的播放效果。进一步，基于确定出的最小距离s，可以确定出第一时刻(对应第一位置)，从而保证用户进入第二状态的时机，可以满足到达所述第一同步的时刻相对第二时刻不会过早也不会过晚，保障较好的用户体验和较低的收听广播的成本。
步骤703：所述终端在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态。
在第二时刻到达时，播放器当前播放的第一广播信号的音频帧与接收到的第二广播信号的音频帧已经完全同步。此时，可以停止接收FM信号，仅接收第二广播信号，并正常播放所接收到的所述第二广播信号。
步骤704：所述终端处于所述第三状态时以单倍速率播放所述第二广播信号。
在第三状态中，以单倍速率播放网络广播信号，从而完成切换过程。
场景b2：在FM广播信号由弱变强时，需从网络广播信号切换至FM广播信号。
下面以终端当前播放第二广播信号，终端从第一广播信号较弱的场景切换至第一广播信号较强的场景，第二广播信号相对于所述第一广播信号存在时延(FM广播要“快”于网络广播)为例进行说明。例如，在FM信号较弱区域，终端可以仅接收网络广播信号，期间，播放器1.0倍速正常播放接收到的网络广播音频。例如，车辆驶离FM信号较差的区域(比如离开隧道、停车场等)，进入FM信号稳定区域时，可以将信号源从网络广播信号切换为FM广播信号。如果从播放接收到的网络广播信号(对应图8b中的第一状态)直接 切换为播放接收到的FM广播信号(对应图8b中的第四状态)，由于FM广播和网络广播存在时延，用户会漏掉一段广播，出现明显的截断感，导致用户体验较差。本申请中，为保证切换质量，提高用户体验，如图8b所示，在第一状态与第四状态之间，增加第二状态和第三状态。在终端处于第二状态时，继续播放接收到的网络广播信号，接收并缓存FM广播信号，直到播放的网络广播信号与第二状态初始时接收的FM广播信号为相同的内容时(第二同步)，第二状态结束，切换为第三状态。在第三状态时，不再接收网络广播信号，仅继续接收FM并缓存广播信号，并以快于单倍的速率播放自第二状态的起始时刻开始缓存的网络广播信号，直到当前播放的缓存的网络广播信号与当前接收的网络广播信号为相同的内容时(第三同步)，由第三状态切换为仅接收并正常单倍速率播放网络广播信号的第四状态，实现无缝切换，提高用户的收听体验。如图8a所示，为本申请提供的第二中广播信号的播放方法的流程示意图，具体步骤可以包括：
步骤801：终端在第一时刻，从第一状态切换至第二状态。
此时，终端确定第一时刻需要满足以下条件：即将由FM信号弱的区域进入FM信号强的区域。
在场景b2中，基于第一广播信号为网络广播的广播信号，第二广播信号为FM广播信号为例，此时，可以基于广播信号强度图层中的第二广播信号的强度分布，及预测出的未来行驶路径，确定终端到达第二广播信号的强度大于或等于第二切换阈值的第三位置，从而确定第一时刻。
如图8b和图8c所示，终端在第一状态时，终端位于区域B内，即终端接收到的FM广播信号强度较弱，例如，终端当前位置为位置810，该位置在第一覆盖区域范围(区域B)内，FM信号强度低于第一切换阈值，此时，终端通过网络广播信号播放广播。当终端离开第一覆盖区域范围(区域B)后，即终端在离开隧道后，FM广播信号强度变强，例如，当终端到达第二广播信号的强度大于或等于第二切换阈值的第三位置后，可以切换至第二状态，准备从网络广播信号切换为FM广播信号。以终端当前的定位位置为位置810为例，基于第二广播信号的强度为第二切换阈值对应的第一覆盖范围(区域C)的边界，及预测出的在终端到达未来行驶路径800，确定其交点的位置为位置811。因此，可以将位置811确定为待切换广播信号的临界点位置(即由第一状态切换为第二状态的位置点，车辆运动到该位置点的时刻为所述第一时刻)。从而，确定位置811对应的第一时刻。一种可能的实现方式，可以根据预测出的在终端到达未来行驶路径上的任一位置的时刻，确定第三位置对应的第一时刻。例如，基于定位得到的位置810、广播信号强度图层上的位置811、终端的运动状态、路况和终端的未来行驶路径等因素，可以预测出终端到达位置811的第一时刻。
步骤802：终端处于第二状态时以单倍速率播放所述第一广播信号，并且缓存接收到的所述第二广播信号。
在终端到达位置811的第一时刻时，终端可以进入同时接收第一广播信号和第二广播信号的第二状态，此时，第二广播信号的强度可以满足播放要求。
基于第一广播信号和第二广播信号之间的时间迟滞量，确定第二状态对应的时间窗的时间长度，使得改时间长度足以使得在第二状态结束时播放的第一广播信号与被缓存的第二广播信号中的某一帧的内容相同，例如设置第二状态对应的时间窗的时间长度等于所述时间迟滞量，则第二状态结束时播放的第一广播信号与第二状态起始时刻被缓存的第二广 播信号为相同的广播内容。
结合图8b所示，终端进入第二状态下，终端同时接收FM广播信号和网络广播信号。播放器以1.0倍速正常播放接收到的网络广播信号的音频，对接收到的FM广播信号的音频进行缓存。在第二状态下，终端可以对比播放器当前播放的第一广播信号的音频声纹和缓存的第二广播的音频声纹，在确定当前播放的第一广播信号的音频帧(图8b中的白色块)与缓存的网络广播的音频帧为相同的内容(图8b中的白色块)时，确定第一广播信号和第二广播信号同步。此时，可以将播放的第一广播信号与起始缓存的第二广播信号同步，称为第二同步，确定第二同步的时刻可以作为该场景下的第二时刻。
步骤803：所述终端在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态。
在第二同步的时刻到达时，确定终端进入第三状态，此时，终端可以停止接收网络广播信号。
步骤804：所述终端处于所述第三状态时以快于单倍速率播放缓存的所述第二广播信号，并且继续缓存接收到的所述第二广播信号。
在第三状态下，终端的广播播放器以(1+0.x)倍速播放FM音频。直至缓存的FM音频倍速播放完毕。终端可以对比播放器当前播放的第一广播信号的音频声纹和接收到的网络广播的音频声纹，在确定当前播放的第一广播信号的音频帧与接收到的网络广播的音频帧为相同的内容时，确定第一广播信号和第二广播信号达到第三同步，第三同步的时刻为第三时刻。结合图8b中，将缓存的白色块至左斜纹块的音频内容快速播放，使得在第三时刻到达时，接收到的第二广播信号(图8b中的左斜纹块)与当前播放的第二广播信号(图8b中的左斜纹块)同步。
步骤805：所述终端在第三时刻从所述第三状态切换为第四状态。
终端处于所述第四状态时以单倍速率播放接收的第二广播信号。至此，切换过程完成。
下面结合附图介绍本申请实施例中用来实现上述方法的装置。因此，上文中的内容均可以用于后续实施例中，重复的内容不再赘述。
图9为本申请实施例提供的地图生成装置900的结构框图。示例性地，地图生成装置900例如为地图服务器。地图生成装置900包括：接收单元901和处理单元902。或者，接收单元901和处理单元902也可以是两个彼此独立的装置，接收单元901和处理单元902均承载在地图服务器中，接收单元901可以是地图服务器内的通信单元，和处理单元902可以是地图服务器内的处理单元，接收单元901和处理单元902之间可以通过有线方式或无线方式进行通信。
示例性地，地图生成装置900可以是地图服务器，示例性的，也可以是应用于地图服务器中的芯片，或者是终端装置中具有地图生成功能的组合器件、部件，或者其他具有地图生成功能的组合器件、部件等。当地图生成装置900是地图服务器时，接收单元901可以是收发器，可以包括天线和射频电路等，也可以是与处理器耦合的接口电路，处理单元902可以是处理器，例如基带处理器，基带处理器中可以包括一个或多个中央处理模块(central processing unit，CPU)。当地图生成装置900是具有终端功能的部件时，接收单元901可以是射频单元，处理单元902可以是处理器，例如基带处理器。当地图生成装置900是芯片系统时，接收单元901可以是芯片系统(例如基带芯片)的输入输出接口、确定单元可以是芯片系统的处理器，可以包括一个或多个中央处理模块。
其中，处理单元902可以用于执行图5a所示的实施例中由服务器所执行的除了收发操作之外的全部操作，和/或用于支持本文所描述的技术的其它过程。接收单元901可以用于执行图5a所示的实施例中由服务器所执行的全部获取操作，和/或用于支持本文所描述的技术的其它过程。
另外，接收单元901可以是一个功能模块，该功能模块既能完成发送操作也能完成接收操作，例如接收单元901是地图生成装置900所包括的模块，则接收单元901可以用于执行图5a所示的实施例中由服务器所执行的全部发送操作和接收操作，例如，在执行发送操作时，可以认为接收单元901是发送模块，而在执行接收操作时，可以认为接收单元901是接收模块；或者，接收单元901也可以是两个功能模块的统称，这两个功能模块分别为发送模块和接收模块，发送模块用于完成发送操作，例如接收单元901是服务器所包括的模块，则发送模块可以用于执行图5a所示的实施例中由服务器所执行的全部发送操作，接收模块用于完成接收操作，例如接收单元901是服务器所包括的模块，则接收模块可以用于执行图5a所示的实施例中由服务器所执行的全部接收操作。
其中，接收单元901，用于接收多个第一信息，每个所述第一信息包括终端的定位位置、所述终端在所述定位位置接收的以第一调制频率调制的广播信号的强度和所述第一调制频率；处理单元902，用于根据所述多个第一信息，生成广播信号强度图层，所述广播信号强度图层用于表示以所述第一调制频率调制的广播信号的第一强度范围所对应的第一覆盖区域范围。
一种可能的实现方式，所述处理单元902，具体用于：根据所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
一种可能的实现方式，所述处理单元902，具体用于：根据所述多个第一信息中所述终端在所述定位位置接收的广播信号的强度分别与预设的第一强度阈值进行比较得到的多个比较结果，以及所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
一种可能的实现方式，所述广播信号强度图层还用于表示以所述第一调制频率调制的广播信号的第二强度范围所对应的第二覆盖区域范围。
一种可能的实现方式，所述接收单元901，还用于接收多个第二信息，每个所述第二信息包括终端的定位位置、所述终端在所述定位位置接收的以第二调制频率调制的广播信号的强度和所述第二调制频率；所述处理单元，还用于根据所述多个第二信息，生成所述广播信号强度图层，所述广播信号强度图层还用于表示以所述第二调制频率调制的广播信号的至少一个强度范围所对应的至少一个覆盖区域范围。
一种可能的实现方式，所述处理单元902，还用于根据广播信号的调制频率和地理信息预设所述至少一个强度范围所对应的至少一个覆盖区域范围；在预设的所述至少一个强度范围所对应的至少一个覆盖区域范围的基础上，通过对所述多个第一信息中的数据进行训练生成广播信号强度图层，其中，多个第一信息来自于多个终端。
本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能单元可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
图9中的各个单元的只一个或多个可以软件、硬件、固件或其结合实现。所述软件或 固件包括但不限于计算机程序指令或代码，并可以被硬件处理器所执行。所述硬件包括但不限于各类集成电路，如中央处理单元(CPU)、数字信号处理器(DSP)、现场可编程门阵列(FPGA)或专用集成电路(ASIC)。
图10所示的地图生成装置1000包括至少一个处理器1001。地图生成装置1000还包括至少一个存储器1002，用于存储程序指令和/或数据。存储器1002和处理器1001耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性、机械性或其它的形式，用于装置、单元或模块之间的信息交互。处理器1001可以和存储器1002协同操作，处理器1001可以执行存储器1002中存储的程序指令，所述至少一个存储器1002中的至少一个可以包括于处理器1001中。
地图生成装置1000还可包括通信接口1003，用于通过传输介质和其它设备进行通信，从而用于地图生成装置1000可以和其它设备进行通信。在本申请实施例中，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口。在本申请实施例中，通信接口为收发器时，收发器可以包括独立的接收器、独立的发射器；也可以集成收发功能的收发器、或者接口电路等。
应理解，本申请实施例中不限定上述处理器1001、存储器1002以及通信接口1003之间的连接介质。本申请实施例在图10中以存储器1002、处理器1001以及通信接口1003之间通过通信总线1004连接，总线在图10中以粗线表示，其它部件之间的连接方式，仅是示意性说明，并不作为限定。所述总线可以包括地址总线、数据总线、控制总线等。为了便于表示，图10中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线等。
在一种示例中，地图生成装置1000用于实现上述图5a所示流程中服务器执行的步骤，地图生成装置1000可以是服务器，或者服务器内的芯片或电路。通信接口1003，用于执行上文实施例中服务器侧收发的相关操作。处理器1001，用于执行上文方法实施例中服务器侧的处理相关操作。
比如，处理器1001，用于根据所述多个第一信息，生成广播信号强度图层，所述广播信号强度图层用于表示以所述第一调制频率调制的广播信号的第一强度范围所对应的第一覆盖区域范围。通过通信接口1003接收多个第一信息，每个所述第一信息包括终端的定位位置、所述终端在所述定位位置接收的以第一调制频率调制的广播信号的强度和所述第一调制频率。
图11为本申请实施例提供的地图生成装置1100的结构框图。示例性地，地图生成装置1100例如为终端。地图生成装置1100包括检测单元1101，获取单元1102和发送单元1103。可选的，还可以包括处理单元1104。其中，获取单元1102和发送单元1103可以是终端内的通信单元，检测单元1101和处理单元1104可以是终端内的检测单元和处理单元，获取单元1102、发送单元1103、检测单元1101和处理单元1104之间可以通过有线方式或无线方式进行通信。示例性地，地图生成装置1100可以是终端，示例性的，所述终端包括用户设备、终端设备、车或车内的车载装置。所述终端可以为终端设备，也可以是应用于终端设备中的芯片，也可以是终端设备内的地图生成装置，或者，应用于终端设备内的地图生成装置中的芯片，所述终端也可以为具有地图生成功能的车辆，应用于具有地图生成功能的车辆中的芯片，或者，所述终端也可以为具有地图生成功能的车辆的车载装置，应用于具有地图生成功能的车辆中的车载装置的芯片，或者是车载装置中具有地图生成功能的组合器件、部件，或者其他具有地图生成功能的组合器件、部件等。当地图生成装置1100 是终端时，获取单元1102和发送单元1103可以是收发器，可以包括天线和射频电路等，也可以是与处理器耦合的接口电路，检测单元1101可以是处理器，例如基带处理器，基带处理器中可以包括一个或多个中央处理模块(central processing unit，CPU)。当地图生成装置1100是具有终端功能的部件时，获取单元1102和发送单元1103可以是射频单元，检测单元1101可以是具有检测广播信号强度功能的器件，检测单元1101也可以和处理单元1104耦合在一个处理器上，也可以的单独的处理器。当地图生成装置1100是芯片系统时，获取单元1102和发送单元1103可以是芯片系统(例如基带芯片)的输入输出接口、确定单元可以是芯片系统的处理器，可以包括一个或多个中央处理模块。
其中，检测单元1101和处理单元1104可以用于执行图5a所示的实施例中由终端所执行的除了收发操作之外的全部操作，和/或用于支持本文所描述的技术的其它过程。获取单元1102可以用于执行图5a所示的实施例中由终端所执行的全部获取操作，和/或用于支持本文所描述的技术的其它过程。发送单元1103可以用于执行图5a所示的实施例中由终端所执行的全部发送操作，和/或用于支持本文所描述的技术的其它过程。
另外，获取单元1102和发送单元1103可以是一个功能模块，该功能模块既能完成发送操作也能完成接收操作，例如获取单元1102和发送单元1103是地图生成装置1100所包括的模块，则获取单元1102和发送单元1103可以用于执行图5a所示的实施例中由终端所执行的全部发送操作和接收操作，例如，在执行发送操作时，可以认为发送单元1103是发送模块，而在执行接收操作时，可以认为获取单元1102是接收模块；或者，获取单元1102和发送单元1103也可以是两个功能模块的统称，这两个功能模块分别为发送模块和接收模块，发送模块用于完成发送操作，例如发送单元1103是终端所包括的模块，则发送模块可以用于执行图5a所示的实施例中由终端所执行的全部发送操作，接收模块用于完成接收操作，例如获取单元1102是终端所包括的模块，则接收模块可以用于执行图5a所示的实施例中由终端所执行的全部接收操作。
其中，获取单元1102，用于获取所述终端的第一定位位置；检测单元1101，用于检测终端在所述第一定位位置接收的广播信号的强度；发送单元1103，用于向服务器发送第一信息，所述第一信息包括所述第一定位位置、所述终端在所述第一定位位置接收的广播信号的强度和所述广播信号的调制频率，所述第一信息用于确定广播信号强度图层中广播信号的强度范围所对应的覆盖区域范围。
一种可能的实现方式，所述装置还包括处理单元1104，用于在所述发送单元1103向服务器发送第一信息之前，通过将终端在所述第一定位位置接收的广播信号的强度与预设的所述强度范围的阈值的比较，确定所述第一定位位置位于所述覆盖区域范围的边界。
图12所示的地图生成装置1200包括至少一个处理器1201。该地图生成装置1200还包括至少一个存储器1202，用于存储程序指令和/或数据。存储器1202和处理器1201耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性、机械性或其它的形式，用于装置、单元或模块之间的信息交互。处理器1201可以和存储器1202协同操作，处理器1201可以执行存储器1202中存储的程序指令，所述至少一个存储器1202中的至少一个可以包括于处理器1201中。
地图生成装置1200还可包括通信接口1203，用于通过传输介质和其它设备进行通信，从而用于地图生成装置1200可以和其它设备进行通信。在本申请实施例中，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口。在本申请实施例中，通信接口为 收发器时，收发器可以包括独立的接收器、独立的发射器；也可以集成收发功能的收发器、或者接口电路等。
应理解，本申请实施例中不限定上述处理器1201、存储器1202以及通信接口1203之间的连接介质。本申请实施例在图12中以存储器1202、处理器1201以及通信接口1203之间通过通信总线1204连接，总线在图12中以粗线表示，其它部件之间的连接方式，仅是示意性说明，并不作为限定。所述总线可以包括地址总线、数据总线、控制总线等。为了便于表示，图12中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线等。
在一种示例中，地图生成装置1200用于实现上述图5a所示流程中终端执行的步骤，地图生成装置1200可以是终端，或者终端内的芯片或电路。通信接口1203，用于执行上文实施例中终端侧收发的相关操作。处理器1201，用于执行上文方法实施例中终端侧的处理相关操作。
比如，处理器1201，用于检测终端在所述第一定位位置接收的广播信号的强度。
一种可能的实现方式，一种可能的实现方式，处理器1201，还用于向服务器发送第一信息之前，通过将终端在所述第一定位位置接收的广播信号的强度与预设的所述强度范围的阈值的比较，确定所述第一定位位置位于所述覆盖区域范围的边界。
图13为本申请实施例提供的广播信号的播放装置1300的结构框图。示例性地，广播信号的播放装置1300例如为终端。广播信号的播放装置1300包括处理单元1301和播放单元1302，可选的，还可以包括接收单元1303。其中，接收单元1303可以是终端内的通信单元，处理单元1301可以是终端内的处理单元，播放单元1302和处理单元1031之间，或接收单元1303和处理单元1301之间可以通过有线方式或无线方式进行通信。示例性地，广播信号的播放装置1300可以是终端，示例性的，所述终端包括用户设备、终端设备、车或车内的车载装置。所述终端可以为终端设备，也可以是应用于终端设备中的芯片，也可以是终端设备内的广播信号的播放装置，或者，应用于终端设备内的广播信号的播放装置中的芯片，所述终端也可以为具有广播信号的播放功能的车辆，应用于具有广播信号的播放功能的车辆中的芯片，或者，所述终端也可以为具有广播信号的播放功能的车辆的车载装置，应用于具有广播信号的播放功能的车辆中的车载装置的芯片，或者是车载装置中具有广播信号的播放功能的组合器件、部件，或者其他具有广播信号的播放功能的组合器件、部件等。当广播信号的播放装置1300是终端时，接收单元1303可以是收发器，可以包括天线和射频电路等，也可以是与处理器耦合的接口电路，处理单元1301可以是处理器，例如基带处理器，基带处理器中可以包括一个或多个中央处理模块(central processing unit，CPU)。当广播信号的播放装置1300是具有终端功能的部件时，接收单元1303可以是射频单元，处理单元1301可以是处理器，例如基带处理器。当广播信号的播放装置1300是芯片系统时，接收单元1303可以是芯片系统(例如基带芯片)的输入输出接口、确定单元可以是芯片系统的处理器，可以包括一个或多个中央处理模块。
其中，处理单元1301可以用于执行图6、图7a或图8a所示的实施例中由终端所执行的除了收发操作之外的全部操作，和/或用于支持本文所描述的技术的其它过程。接收单元1303可以用于执行图6、图7a或图8a所示的实施例中由终端所执行的全部接收操作，和/或用于支持本文所描述的技术的其它过程。
另外，接收单元1303可以是一个功能模块，该功能模块既能完成发送操作也能完成接收操作，例如接收单元1303是广播信号的播放装置1300所包括的模块，则接收单元1303 可以用于执行图6、图7a或图8a所示的实施例中由终端所执行的全部发送操作和接收操作，例如，在执行发送操作时，可以认为接收单元1303是发送模块，而在执行接收操作时，可以认为接收单元1303是接收模块；或者，接收单元1303也可以是两个功能模块的统称，这两个功能模块分别为发送模块和接收模块，发送模块用于完成发送操作，例如接收单元1303是终端所包括的模块，则发送模块可以用于执行图6、图7a或图8a所示的实施例中由终端所执行的全部发送操作，接收模块用于完成接收操作，例如接收单元1303是终端所包括的模块，则接收模块可以用于执行图6、图7a或图8a所示的实施例中由终端所执行的全部接收操作。
其中，接收单元1303，用于接收来自地图服务器的广播信号强度图层，所述广播信号强度图层属于地图图层，所述广播信号强度图层用于表示广播信号的强度等级所对应广播信号的覆盖范围；处理单元1301，用于根据所述终端的当前定位位置、所述终端的当前运动状态、所述终端的未来行驶路径和所述广播信号强度图层，在第一时刻从仅接收第一广播信号的第一状态切换为同时接收第一广播信号和第二广播信号的第二状态，其中，所述第一广播信号和所述第二广播信号的类型不同；处于所述第一状态时，通过播放单元1302以单倍速率播放接收的所述第一广播信号；处于所述第二状态时，通过所述播放单元1302播放接收的所述第一广播信号。
一种可能的实现方式，所述第二广播信号相对于所述第一广播信号存在时延，所述处理单元1301，用于处于所述第二状态时，通过所述播放单元1302以慢于单倍速率播放所述第一广播信号，所述处理单元1301，还用于在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态，所述第二时刻为播放的所述第一广播信号与接收的第二广播信号第一同步的时刻；处于所述第三状态时，通过所述播放单元1302以单倍速率播放所述第二广播信号。
一种可能的实现方式，所述第一广播信号相对于所述第二广播信号存在时延，所述处理单元1301，用于处于所述第二状态时，通过所述播放单元1302以单倍速率播放所述第一广播信号并且缓存接收到的所述第二广播信号，所述处理单元1301，还用于：在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态，所述第二时刻为播放的所述第一广播信号与起始缓存的第二广播信号第二同步的时刻，处于所述第三状态时，通过所述播放单元1302以快于单倍速率播放缓存的所述第二广播信号，并且继续缓存接收到的所述第二广播信号；在第三时刻从所述第三状态切换为第四状态，所述第三时刻为缓存的所述第二广播信号与播放的所述第二广播信号第三同步的时刻，处于所述第四状态时，通过所述播放单元1302以单倍速率播放接收的所述第二广播信号。
图13中的各个单元的只一个或多个可以软件、硬件、固件或其结合实现。所述软件或固件包括但不限于计算机程序指令或代码，并可以被硬件处理器所执行。所述硬件包括但不限于各类集成电路，如中央处理单元(CPU)、数字信号处理器(DSP)、现场可编程门阵列(FPGA)或专用集成电路(ASIC)。
图14所示的广播信号的播放装置1400包括至少一个处理器1401。该广播信号的播放装置1400还包括至少一个存储器1402，用于存储程序指令和/或数据。存储器1402和处理器1401耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性、机械性或其它的形式，用于装置、单元或模块之间的信息交互。处理器1401可以和存储器1402协同操作，处理器1401可以执行存储器1402中存储的程序指令，所 述至少一个存储器1402中的至少一个可以包括于处理器1401中。
广播信号的播放装置1400还可包括通信接口1403，用于通过传输介质和其它设备进行通信，从而用于广播信号的播放装置1400可以和其它设备进行通信。在本申请实施例中，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口。在本申请实施例中，通信接口为收发器时，收发器可以包括独立的接收器、独立的发射器；也可以集成收发功能的收发器、或者接口电路等。
应理解，本申请实施例中不限定上述处理器1401、存储器1402以及通信接口1403之间的连接介质。本申请实施例在图13中以存储器1402、处理器1401以及通信接口1403之间通过通信总线1404连接，总线在图13中以粗线表示，其它部件之间的连接方式，仅是示意性说明，并不作为限定。所述总线可以包括地址总线、数据总线、控制总线等。为了便于表示，图13中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线等。
在一种示例中，广播信号的播放装置1400用于实现上述图6、图7a或图8a所示的终端执行的步骤，广播信号的播放装置1400可以是终端，或者终端内的芯片或电路。通信接口1403，用于执行上文实施例中终端侧收发的相关操作。处理器1401，用于执行上文方法实施例中终端侧的处理相关操作。
比如，处理器1401，用于根据所述终端的当前定位位置、所述终端的当前运动状态、所述终端的未来行驶路径和所述广播信号强度图层，在第一时刻从仅接收第一广播信号的第一状态切换为同时接收第一广播信号和第二广播信号的第二状态，其中，所述第一广播信号和所述第二广播信号的类型不同；处于所述第一状态时，以单倍速率播放接收的所述第一广播信号；处于所述第二状态时，播放接收的所述第一广播信号。
本申请实施例还提供一种通信系统，该通信系统包括地图生成装置900或地图生成装置1000、该通信系统包括地图生成装置1100或地图生成装置1200，还可以包括广播信号的播放装置1300或广播信号播放装置1400。
本申请实施例还提供一种计算机存储介质，所述计算机可读存储介质中存储有指令，当其在处理器上运行时，使得所述定位装置执行上述实施例任意一种可能的实施方式中所述的方法。
本申请实施例还提供一种包含指令的计算机程序产品，所述计算机程序产品中存储有指令，当其在处理器上运行时，使得所述定位装置执行上述实施例任意一种可能的实施方式中所述的方法。
在本申请实施例中，处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中，存储器可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置，用于存储程序指令和/或数据。
本申请实施例提供的方法中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，简称DSL)或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机可以存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，数字视频光盘(digital video disc，简称DVD)、或者半导体介质(例如，SSD)等。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。
本申请实施例中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，可以表示：a,b,c,a和b,a和c,b和c,或a和b和c，其中a,b,c可以是单个，也可以是多个。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，在没有超过本申请的范围内，可以通过其他的方式实现。例如，以上所描述的实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性劳动的情况下，即可以理解并实施。
另外，所描述装置和方法以及不同实施例的示意图，在不超出本申请的范围内，可以与其它系统，模块，技术或方法结合或集成。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电子、机械或其它的形式。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (27)

  1. 一种地图生成方法，其特征在于，包括：
    接收多个第一信息，每个所述第一信息包括终端的定位位置、所述终端在所述定位位置接收的以第一调制频率调制的广播信号的强度和所述第一调制频率；
    根据所述多个第一信息，生成广播信号强度图层，所述广播信号强度图层用于表示以所述第一调制频率调制的广播信号的第一强度范围所对应的第一覆盖区域范围。
  2. 如权利要求1所述的方法，其特征在于，所述根据所述多个第一信息，生成广播信号强度图层，包括：
    根据所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
  3. 如权利要求2所述的方法，其特征在于，所述根据所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界，包括：
    根据所述多个第一信息中所述终端在所述定位位置接收的广播信号的强度分别与预设的第一强度阈值进行比较得到的多个比较结果，以及所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
  4. 如权利要求1-3任一项所述的方法，其特征在于，所述广播信号强度图层还用于表示以所述第一调制频率调制的广播信号的第二强度范围所对应的第二覆盖区域范围。
  5. 如权利要求1-4任一项所述的方法，其特征在于，所述方法还包括：
    接收多个第二信息，每个所述第二信息包括终端的定位位置、所述终端在所述定位位置接收的以第二调制频率调制的广播信号的强度和所述第二调制频率；
    根据所述多个第二信息，生成所述广播信号强度图层，所述广播信号强度图层还用于表示以所述第二调制频率调制的广播信号的至少一个强度范围所对应的至少一个覆盖区域范围。
  6. 如权利要求1-5任一项所述的方法，其特征在于，所述方法还包括：
    根据广播信号的调制频率和地理信息预设所述至少一个强度范围所对应的至少一个覆盖区域范围；
    所述根据所述多个第一信息，生成广播信号强度图层，包括：
    在预设的所述至少一个强度范围所对应的至少一个覆盖区域范围的基础上，通过对所述多个第一信息中的数据进行训练生成广播信号强度图层，其中，多个第一信息来自于多个终端。
  7. 一种地图生成方法，其特征在于，包括：
    获取终端的第一定位位置；
    检测终端在所述第一定位位置接收的广播信号的强度；
    向服务器发送第一信息，所述第一信息包括所述第一定位位置、所述终端在所述第一定位位置接收的广播信号的强度和所述广播信号的调制频率，所述第一信息用于确定广播信号强度图层中广播信号的强度范围所对应的覆盖区域范围。
  8. 如权利要求7所述的方法，其特征在于，所述向服务器发送第一信息之前，所述方法还包括：
    通过将终端在所述第一定位位置接收的广播信号的强度与预设的所述强度范围的阈值的比较，确定所述第一定位位置位于所述覆盖区域范围的边界。
  9. 一种广播信号的播放方法，其特征在于，所述方法应用于终端，包括：
    所述终端接收来自地图服务器的广播信号强度图层，所述广播信号强度图层属于地图图层，所述广播信号强度图层用于表示广播信号的强度等级所对应广播信号的覆盖范围；
    根据所述终端的当前定位位置、所述终端的当前运动状态、所述终端的未来行驶路径和所述广播信号强度图层，在第一时刻从仅接收第一广播信号的第一状态切换为同时接收第一广播信号和第二广播信号的第二状态，其中，所述第一广播信号和所述第二广播信号的类型不同；
    所述终端处于所述第一状态时以单倍速率播放接收的所述第一广播信号；
    所述终端处于所述第二状态时播放接收的所述第一广播信号。
  10. 如权利要求9所述的方法，其特征在于，所述第二广播信号相对于所述第一广播信号存在时延，所述终端处于所述第二状态时以慢于单倍速率播放所述第一广播信号，所述方法还包括：
    所述终端在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态，所述第二时刻为播放的所述第一广播信号与接收的第二广播信号第一同步的时刻；
    所述终端处于所述第三状态时以单倍速率播放所述第二广播信号。
  11. 如权利要求9所述的方法，其特征在于，所述第一广播信号相对于所述第二广播信号存在时延，所述终端处于所述第二状态时以单倍速率播放所述第一广播信号并且缓存接收到的所述第二广播信号，所述方法还包括：
    所述终端在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态，所述第二时刻为播放的所述第一广播信号与起始缓存的第二广播信号第二同步的时刻，所述终端处于所述第三状态时以快于单倍速率播放缓存的所述第二广播信号，并且继续缓存接收到的所述第二广播信号；
    所述终端在第三时刻从所述第三状态切换为第四状态，所述第三时刻为缓存的所述第二广播信号与播放的所述第二广播信号第三同步的时刻，所述终端处于所述第四状态时以单倍速率播放接收的所述第二广播信号。
  12. 一种地图生成装置，其特征在于，包括：
    接收单元，用于接收多个第一信息，每个所述第一信息包括终端的定位位置、所述终端在所述定位位置接收的以第一调制频率调制的广播信号的强度和所述第一调制频率；
    处理单元，用于根据所述多个第一信息，生成广播信号强度图层，所述广播信号强度图层用于表示以所述第一调制频率调制的广播信号的第一强度范围所对应的第一覆盖区域范围。
  13. 如权利要求12所述的装置，其特征在于，所述处理单元，具体用于：
    根据所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
  14. 如权利要求13所述的装置，其特征在于，所述处理单元，具体用于：
    根据所述多个第一信息中所述终端在所述定位位置接收的广播信号的强度分别与预设的第一强度阈值进行比较得到的多个比较结果，以及所述多个第一信息中的多个所述定位位置，确定所述第一覆盖区域范围的边界。
  15. 如权利要求12-14任一项所述的装置，其特征在于，所述广播信号强度图层还用于表示以所述第一调制频率调制的广播信号的第二强度范围所对应的第二覆盖区域范围。
  16. 如权利要求12-15任一项所述的装置，其特征在于，所述接收单元，还用于接收多 个第二信息，每个所述第二信息包括终端的定位位置、所述终端在所述定位位置接收的以第二调制频率调制的广播信号的强度和所述第二调制频率；
    所述处理单元，还用于根据所述多个第二信息，生成所述广播信号强度图层，所述广播信号强度图层还用于表示以所述第二调制频率调制的广播信号的至少一个强度范围所对应的至少一个覆盖区域范围。
  17. 如权利要求12-16任一项所述的装置，其特征在于，所述处理单元，还用于根据广播信号的调制频率和地理信息预设所述至少一个强度范围所对应的至少一个覆盖区域范围；在预设的所述至少一个强度范围所对应的至少一个覆盖区域范围的基础上，通过对所述多个第一信息中的数据进行训练生成广播信号强度图层，其中，多个第一信息来自于多个终端。
  18. 一种地图生成装置，其特征在于，包括：
    获取单元，用于获取终端的第一定位位置；
    检测单元，用于检测终端在所述第一定位位置接收的广播信号的强度；
    发送单元，用于向服务器发送第一信息，所述第一信息包括所述第一定位位置、所述终端在所述第一定位位置接收的广播信号的强度和所述广播信号的调制频率，所述第一信息用于确定广播信号强度图层中广播信号的强度范围所对应的覆盖区域范围。
  19. 如权利要求18所述的装置，其特征在于，所述装置还包括处理单元，用于在所述发送单元向服务器发送第一信息之前，通过将终端在所述第一定位位置接收的广播信号的强度与预设的所述强度范围的阈值的比较，确定所述第一定位位置位于所述覆盖区域范围的边界。
  20. 一种广播信号的播放装置，其特征在于，包括：
    接收单元，用于接收来自地图服务器的广播信号强度图层，所述广播信号强度图层属于地图图层，所述广播信号强度图层用于表示广播信号的强度等级所对应广播信号的覆盖范围；
    处理单元，用于根据所述终端的当前定位位置、所述终端的当前运动状态、所述终端的未来行驶路径和所述广播信号强度图层，在第一时刻从仅接收第一广播信号的第一状态切换为同时接收第一广播信号和第二广播信号的第二状态，其中，所述第一广播信号和所述第二广播信号的类型不同；处于所述第一状态时，通过播放单元以单倍速率播放接收的所述第一广播信号；处于所述第二状态时，通过所述播放单元播放接收的所述第一广播信号。
  21. 如权利要求20所述的装置，其特征在于，所述第二广播信号相对于所述第一广播信号存在时延，所述处理单元，用于处于所述第二状态时，通过所述播放单元以慢于单倍速率播放所述第一广播信号，所述处理单元，还用于在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态，所述第二时刻为播放的所述第一广播信号与接收的第二广播信号第一同步的时刻；处于所述第三状态时，通过所述播放单元以单倍速率播放所述第二广播信号。
  22. 如权利要求20所述的装置，其特征在于，所述第一广播信号相对于所述第二广播信号存在时延，所述处理单元，用于处于所述第二状态时，通过所述播放单元以单倍速率播放所述第一广播信号并且缓存接收到的所述第二广播信号，所述处理单元，还用于：
    在第二时刻从所述第二状态切换为仅接收第二广播信号的第三状态，所述第二时刻为 播放的所述第一广播信号与起始缓存的第二广播信号第二同步的时刻，处于所述第三状态时，通过所述播放单元以快于单倍速率播放缓存的所述第二广播信号，并且继续缓存接收到的所述第二广播信号；
    在第三时刻从所述第三状态切换为第四状态，所述第三时刻为缓存的所述第二广播信号与播放的所述第二广播信号第三同步的时刻，处于所述第四状态时，通过所述播放单元以单倍速率播放接收的所述第二广播信号。
  23. 一种地图生成装置，其特征在于，包括：
    处理器和接口电路；
    其中，所述处理器通过所述接口电路与存储器耦合，所述处理器用于执行所述存储器中的程序代码，以实现如权利要求1-6中任一项所述的方法。
  24. 一种地图生成装置，其特征在于，包括：
    处理器和接口电路；
    其中，所述处理器通过所述接口电路与存储器耦合，所述处理器用于执行所述存储器中的程序代码，以实现如权利要求7-8中任一项所述的方法。
  25. 一种广播信号的播放装置，其特征在于，包括：
    处理器和接口电路；
    其中，所述处理器通过所述接口电路与存储器耦合，所述处理器用于执行所述存储器中的程序代码，以实现如权利要求9-11中任一项所述的方法。
  26. 一种计算机可读存储介质，其特征在于，包括计算机指令，当所述计算机指令在被处理器运行时，实现如权利要求1-11任一项所述的方法。
  27. 一种计算机程序产品，其特征在于，当所述计算机程序产品在处理器上运行时，实现如权利要求1-11任一项所述的方法。
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