CN111326181B - Method, apparatus, system and storage medium for controlling multimedia playback in vehicle - Google Patents
Method, apparatus, system and storage medium for controlling multimedia playback in vehicle Download PDFInfo
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- CN111326181B CN111326181B CN201811524547.6A CN201811524547A CN111326181B CN 111326181 B CN111326181 B CN 111326181B CN 201811524547 A CN201811524547 A CN 201811524547A CN 111326181 B CN111326181 B CN 111326181B
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B31/00—Arrangements for the associated working of recording or reproducing apparatus with related apparatus
Abstract
The invention relates to a method for controlling multimedia playback in a vehicle, the method comprising: receiving a signal for the played multimedia content from a signal source (S1); calling a navigation map; acquiring positioning information of a vehicle on a navigation map; determining whether the vehicle enters or exits the weak signal road section according to the positioning information; in the case where the vehicle enters or exits the weak signal section, the playing of the multimedia content is controlled accordingly. The invention further relates to a device for controlling multimedia playback in a vehicle, a multimedia system, a vehicle and a computer-readable storage medium.
Description
Technical Field
The invention belongs to the technical field of automobile electronic and vehicle unit (head unit) control technology. In particular, the present invention relates to a method, an apparatus, an in-vehicle multimedia system, a vehicle and a computer readable storage medium for controlling multimedia playback in a vehicle.
Background
Vehicle multimedia systems (infotainment systems) typically support a variety of audio signal source formats, typically audio for navigation systems, AM/FM radio, music (CD or MP3), telephones, and other information or entertainment devices. The car audio system is composed of an audio signal source, a main machine including an amplifier, and a speaker installed in a vehicle. The audio signal is processed by the vehicle-mounted host and then output to the loudspeaker. The radio (or multimedia content received through a mobile network) is a device frequently used in the existing automobile, and the radio is properly played during driving, so that the radio is not only beneficial to acquiring some real-time information during driving, but also can increase the entertainment experience during driving and reduce the possibility of fatigue driving.
However, when the current vehicle-mounted multimedia system encounters a situation that the vehicle enters some weak signal or no-signal area, such as a tunnel section, since the radio electromagnetic waves around the vehicle-mounted antenna are shielded and absorbed by the tunnel, noise and noise are generated due to the absence of the signal of the vehicle radio, and the driving experience of the vehicle is greatly influenced. In addition, noise and fault sound emitted by the vehicle-mounted system can attract the attention of a driver, and the driver even needs to manually operate the vehicle machine, so that potential safety hazards in driving are caused.
Patent document CN103345175A discloses a bidirectional auto-induction switching device for car radio, which includes a signal detector, a calculation processing unit connected with the signal detector, and a change-over switch controlled by the calculation processing unit; the signal detector is used for detecting the signal intensity value of the automobile radio antenna and sending the signal intensity value to the calculation processing unit; the change-over switch can realize the function switching between the vehicle-mounted CD and the radio; the calculation processing unit compares the signal intensity value detected by the signal detector with a preset threshold value, so that the functions of the vehicle-mounted CD and the radio are switched. However, this method requires the use of an accurate signal detector, and also requires different kinds of signal detectors and corresponding setting parameters for different wireless signals, thereby increasing the manufacturing cost of the device and the complexity of product development. In addition, this method cannot detect the presence of a weak signal area in advance, and therefore cannot deal with it in advance.
Disclosure of Invention
To solve the problems of the prior art, the present invention provides a method, an apparatus, an in-vehicle multimedia system, a vehicle and a computer-readable storage medium control for controlling multimedia playback in a vehicle. The technical scheme is as follows:
a first aspect of the present invention provides a method of controlling multimedia playback in a vehicle, the method comprising:
receiving a signal for playing multimedia content from a signal source;
calling a navigation map;
acquiring positioning information of a vehicle on a navigation map;
determining whether the vehicle enters or exits the weak signal road section according to the positioning information;
in the case where the vehicle enters or exits the weak signal section, the playing of the multimedia content is controlled accordingly.
According to the present invention, if a multimedia content signal for playback is currently being received in a vehicle, it is determined whether the vehicle is driving in or out of a road condition, i.e., a weak signal section, that would cause a decrease in the received signal, based on positioning information of the vehicle on a navigation map. If the vehicle is driving into or out of the weak signal road section, a corresponding control instruction is sent out, and the playing of the multimedia content is correspondingly controlled or adjusted.
According to the invention, the weak signal section may be a tunnel section, a bridge section, a valley section, etc., but may also be an underground facility section, etc. Here, the tunnel may be an underground tunnel, a mountain tunnel, a sea-crossing tunnel, a river-crossing tunnel, or the like. A bridge may involve a sea-crossing, river-crossing bridge or a section of road under a large bridge body that is remote from the signal emitting device. In addition, the valleys surrounded by the hills may also cause signal reception difficulties. In cities, it may also be difficult to receive signals after driving into underground facilities, such as underground garages and the like.
Furthermore, the method according to the invention can be implemented simply in an existing multimedia system in a vehicle, without the installation of additional loudspeakers or multimedia systems, but simply by upgrading the software in the vehicle. This saves considerable outlay on installation or retrofitting.
According to one embodiment of the invention, the content signal from the signal source is a radio broadcast signal or a wireless communication signal. It should be noted that the signal source may relate not only to pure broadcast systems such as frequency modulation broadcast (FM), amplitude modulation broadcast (AM), Digital Audio Broadcast (DAB), Digital Video Broadcast (DVB) and Digital Radio Broadcasting (DRM), but also to cellular network communication systems using typical unicast (one-to-one) transmission or broadcast (one-to-many) transmission with enhanced multimedia broadcast multicast service (eMBMS). The signal source may also relate to a database, server, etc. accessed based on a wireless communication technology, such as global system for mobile communications (GSM), Universal Mobile Telecommunications System (UMTS), or Long Term Evolution (LTE), a Wireless Local Area Network (WLAN) according to the IEEE 802.11x standard. Here, multimedia content may be buffered, downloaded, or played online from the database and/or server.
According to one embodiment of the present invention, controlling the playing of multimedia content comprises: pause playing, resume playing, increase volume, decrease volume, switch signal sources and send prompt messages.
In the case of a vehicle entering a weak signal section, the playing of the multimedia content can be suspended, the volume of the playing of the multimedia content can be reduced, in particular gradually reduced, switching to other signal sources and/or the emission of a prompt message can be carried out according to the invention. Here, the other signal source may be CD music, pre-stored contents in a vehicle, or the like, and may also be a data source connected through a short-range wireless communication method, such as bluetooth. The method can also give a prompt to the personnel in the vehicle to inform the personnel in the vehicle that the current vehicle enters a road section with poor signals and cannot continuously play multimedia contents, such as radio contents.
And under the condition that the vehicle drives out of the weak signal road section, according to the invention, the playing of the multimedia content can be recovered, the volume of the played multimedia content can be increased, the signal source can be switched back and/or prompt information can be sent out. In this case, the multimedia content can be played back continuously before the vehicle enters the weak signal section, the sound volume can be restored, in particular gradually, to the original level, and the other signal sources can be switched back to the originally played signal source. In addition, a prompt can also be issued to the vehicle occupants, which informs them of the end of the weak signal section and thus continues the previous playback.
Additionally, the control of the playing of the multimedia content can also take place with a time delay or a time advance or by conditional triggering. For example, the playing of the multimedia content may be controlled accordingly, starting 3 seconds after it is determined that the vehicle has driven into the weak signal section. In addition, it is also possible to combine the locating information, for example, to start the playing of the multimedia content only 30 meters after the vehicle is determined to be driven into the weak signal section. Therefore, on the premise of ensuring the playing quality, the playing time as long as possible is provided for the personnel in the vehicle.
According to one embodiment of the invention, the weak signal section is a tunnel section.
According to an embodiment of the invention, the method further comprises:
acquiring the length of a tunnel section from a navigation map; and is
And comparing the length of the tunnel road section with a tunnel length threshold value to judge whether the tunnel road section is a weak signal road section.
In driving, the most common weak signal section is a tunnel. And the length of the tunnel section can be easily known through the navigation map. It has been found that in some cases relatively short tunnel sections, for example tunnels or culverts of only 15 meters in length, do not affect the radio signal. The tunnel or culvert length is too short to affect the wireless signal reception strength. Particularly FM signals, are high in frequency and can travel a short distance through the tunnel. The received signal does not deteriorate so much that it cannot be played within this distance. In this case, although there is a tunnel or culvert section, it should not be determined or judged as the weak signal section. It has been found that for fm broadcasts, the strength of the radio signal is affected only when the length of the tunnel segment is greater than 50 meters (and in some cases greater than 300 meters).
According to the invention, the tunnel length threshold may be 40 meters, 50 meters, 60 meters, 70 meters, 80 meters, 100 meters, 200 meters or 300 meters. Preferably, whether the tunnel section is a weak signal section is determined by comparing the known length of the tunnel section with the tunnel length threshold. And the playing of the multimedia contents is controlled accordingly only when the tunnel section is determined to be a weak signal section. Therefore, the watching or listening of the multimedia content by the vehicle interior personnel is avoided from being interrupted unnecessarily, and the user experience is further improved.
According to one embodiment of the invention, the detection result of the sensing module in the vehicle is obtained, and the positioning information and the detection result are combined to determine whether the vehicle enters or exits the weak signal road section. According to this embodiment, weak signal sections which lead to a deterioration of the received signal can be determined particularly reliably. In the invention, the positioning information and the detection result of the sensing module are combined to judge the positioning information, so that the very accurate judgment of the weak signal road section is realized. Typically, the vehicle is positioned with some measurement bias and/or measurement delay. Especially in the case of high-speed and/or complex terrain, such as mountainous terrain, the positioning drift and/or delay is particularly significant. This results in an inability to accurately determine whether the vehicle is currently entering or exiting a weak signal road segment. However, the received signal of the multimedia content is always played instantaneously, and the vehicle interior person can sensitively perceive noise, noise and the like caused by signal deterioration at any time. Thus, early or late intervention to play the multimedia content is disruptive to the user. In addition, vehicle localization is also typically limited to a two-dimensional plane on a map, and it is also difficult to detect whether a vehicle has entered an underground facility, such as an underground garage, by localization.
By combining the positioning information and the detection result of the sensing module, the accurate judgment of the weak signal road section is realized, so that the playing of multimedia content can be intervened or controlled at a proper moment. Firstly, because the control is consistent with the vehicle environment change, the automatic control is carried out before the manual operation of personnel in the vehicle, particularly a driver, so that the driver is not distracted by operating a multimedia system, and the driving safety is improved. The invention eliminates the doubtful that the received multimedia content, especially the radio broadcast, can not be played normally by the personnel in the vehicle due to timely intervention or control, and also reduces the noise and the noise caused by weak signals in time. Therefore, potential safety hazards caused by noise and noise are avoided, intelligent automatic control according with road conditions and/or signal intensity conditions is achieved, and user experience of the vehicle-mounted multimedia system is improved.
According to one embodiment of the invention, the sensor module is a camera and/or a brightness sensor.
According to the invention, the positioning information can be combined with the detection result of the camera or the brightness sensor to accurately judge whether the vehicle enters or exits a weak signal area, particularly a tunnel or an underground garage. In this case, it is possible to capture an image of the surroundings of the vehicle, in particular the front of the vehicle, using a camera and to detect whether the vehicle is entering or is about to enter a weak signal section.
Furthermore, a cost-effective and simple embodiment can be achieved using the brightness sensor. On the one hand, existing vehicles are generally already equipped with sensors for detecting the brightness, whereby the existing components in the vehicle can be utilized. On the other hand, the detection of the luminance sensor signal is significantly simpler than image processing, reducing the complexity of implementation.
The use of only the camera or the luminance sensor is not limited, and both the camera and the luminance sensor may be used in combination.
According to one embodiment of the invention, the presence of weak signal sections and/or traffic signs associated with weak signal sections is detected in the image captured by the camera; and/or detecting a change in brightness by a brightness sensor. In the case that the sensing module is a camera, it can detect whether there is a weak signal section, for example, whether there is a tunnel, a valley, a bridge, an underground garage, etc. in front, which can be realized by detecting whether there are features of these scenes in the image through graphic processing; whether a traffic sign related to the weak signal road section exists or not can be detected, for example, whether a traffic sign indicating a tunnel, a valley, a bridge or an underground garage exists or not is detected in the shot image; or a combination of both. In the case where the sensing module is a brightness sensor, the change in brightness can be detected, which is practical especially in the case of daytime vehicles entering tunnels or underground garages. Since the brightness of the surroundings of the vehicle changes rapidly in the process, it is immediately known that the vehicle has moved into or out of the tunnel or underground garage.
According to a second aspect of the present invention, there is provided a control apparatus for controlling multimedia playback in a vehicle, characterized in that the apparatus comprises:
a receiving module for receiving a signal of multimedia content for playing from a signal source;
the map module is used for calling a navigation map;
the positioning module is used for acquiring positioning information of the vehicle on a navigation map;
the determining module is used for determining whether the vehicle enters or exits the weak signal road section according to the positioning information;
and the control module is used for correspondingly controlling the playing of the multimedia content under the condition of driving in or driving out the weak signal road section.
According to one embodiment of the invention, the control module can pause playing, resume playing, increase volume, decrease volume, switch signal sources and send out prompt messages.
According to an embodiment of the present invention, the determining module is further configured to:
acquiring the length of a tunnel section from a navigation map; and is
And comparing the length of the tunnel section with a tunnel length threshold value to judge whether the tunnel section is a weak signal section.
In a third aspect of the present invention, a vehicle multimedia system is provided, which includes:
-a device according to the invention for controlling multimedia playback in a vehicle, and
-at least one speaker and/or at least one display.
According to a preferred vehicle multimedia system, the system further comprises a sensing module.
In a fourth aspect of the invention, a vehicle is provided, said vehicle comprising an in-vehicle multimedia system according to the invention.
In a fifth aspect of the invention, there is provided a computer-readable storage medium having executable instructions that, when executed, cause a computer to perform a method according to the invention. By means of the computer-readable storage medium according to the invention, it is possible to retrofit vehicles in a simple manner in the case of connection of already existing loudspeakers and/or displays of the vehicle, in order to achieve the technical advantages of the invention.
As described above, according to the present invention, when the vehicle is about to enter the tunnel section or is already in the tunnel, the signal source played by the vehicle-mounted multimedia system can be adjusted accordingly, for example, the vehicle-mounted multimedia system is switched to other media signal sources such as CD music, vehicle-mounted pre-stored content, etc.; and a prompt can be sent to the personnel in the vehicle to inform the personnel in the vehicle that the content of the radio cannot be played continuously because the current vehicle enters a road section with a poor signal. Therefore, the doubtful that the contents of the radio cannot be played normally by people in the vehicle can be eliminated, and noise caused by signal reduction are avoided. On the one hand, the potential safety hazard caused by noise and noise is avoided, on the other hand, the vehicle-mounted multimedia system is realized, intelligent automatic switching is carried out between different signal sources according to different road conditions and signal intensity conditions, and the user experience of the vehicle-mounted multimedia system is improved. The whole process is automatically executed by the system, a user does not need to transfer attention to a control operation interface of the vehicle machine, and manual operation is not needed. Brings great convenience to users and does not influence the driving safety.
Drawings
FIG. 1 is a schematic view of a vehicle and tunnel section in an embodiment of the invention;
FIG. 2 is a flow chart of a method for controlling multimedia playback in a vehicle according to an embodiment of the present invention;
fig. 3 is a block diagram of an apparatus for controlling multimedia playback in a vehicle according to an embodiment of the present invention;
FIG. 4 is a block diagram of another apparatus for controlling multimedia playback in a vehicle according to an embodiment of the present invention;
fig. 5 shows a block diagram of a vehicle multimedia system of an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
The expression "and/or" is used herein in the sense of including at least one of the components listed before and after the expression. Also, the expression "connected" is used in a sense that it includes a direct connection with another component or an indirect connection through another component. The singular forms herein also include the plural unless specifically mentioned in the context of a phrase. Further, as used herein, reference to "comprising" or "including" components, steps, operations, and elements means that at least one other component, step, operation, and element is present or added.
It should be understood that the term "vehicle" or "vehicular" or other similar terms as used herein generally includes motor vehicles, such as including Sport Utility Vehicles (SUVs), buses, vans, commercial vehicles, passenger vehicles, including various boats, ships, boats, aircraft, and the like, and includes hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., fuel derived from sources other than petroleum). As referred to herein, a hybrid vehicle is a vehicle having two or more power sources, such as both gasoline-powered and electric-powered vehicles.
As used herein, the phrase "in-vehicle system" or "in-vehicle" means an integrated information system with wired/wireless data transmission capability. These systems are sometimes referred to as in-vehicle information systems and are typically integrated with telematics services, entertainment systems, and/or navigation systems. In recent years, short-range wireless communication connection, such as bluetooth technology, has been applied to in-vehicle devices, and therefore, even when a mobile phone is left in, for example, a bag or a pocket, a call can be made through an in-vehicle system, or audio and video contents stored in advance in a smart phone are played.
Further, it should be understood that the method of controlling described may be performed by at least one controller and a communication component. The term "controller" refers to a hardware device that includes a memory and a processor. The memory is configured to store program instructions, and the processor is configured to execute the program instructions to perform one or more processes described further below.
In the following description of the present invention, a tunnel section is taken as an example of a weak signal section to more visually introduce the present invention.
Fig. 1 is a schematic illustration of a vehicle 10 and a tunnel segment 20 in an embodiment of the invention. As shown, the vehicle 10 is traveling toward the tunnel 20 and is at a distance D1 from the entrance of the tunnel 20. The tunnel segment 20 is shown as having a length D2. Also shown is a tunnel-identifying traffic sign 30 at the tunnel portal. According to the present invention, a camera provided in the vehicle as a sensing module 400 (see fig. 5) may capture an image in front of the vehicle, and may recognize the traffic sign 30 and/or the tunnel entrance in front in the image. Likewise, when a tunnel is shown, a traffic sign of the end of the tunnel (e.g., a traffic sign of the removal of the speed limit) and/or a tunnel exit can also be correspondingly recognized.
Fig. 2 is a flow chart of a method for controlling multimedia playback in a vehicle according to the present invention. First, in step 101, a signal for played multimedia content is received from the signal source S1. For example, audio signals of an FM/AM radio, video signals of DVB or other signals of multimedia content propagated through a mobile communication network are received. The received content is typically audio and may also be video or other multimedia streams.
Then, in step 102, the navigation map is invoked. In an in-vehicle system, a navigation map is stored in advance, particularly in an in-vehicle system having a navigation function. Such navigation maps generally contain various information on road conditions, such as road shapes, road types (roads, tunnels, bridges), and length information of each road. The information in the navigation map required for the trip is accessible or readable.
Next, in step 103, the positioning information of the vehicle on the navigation map is acquired. The current location coordinates of the vehicle 10, environmental information of the current location of the vehicle, and the like can be acquired by an on-vehicle location module such as a GPS. For example, the positioning information may include the road type of the road segment to be traveled and the distance to the next road segment, thereby further determining whether the vehicle is located or driving to the road segment with weak signal. Specifically, since radio electromagnetic waves and other radio signals around the vehicle-mounted antenna in the tunnel section are shielded and absorbed by the tunnel, whether the tunnel section exists on the current route can be found according to the navigation map, and then the position relation between the current position of the vehicle and the tunnel section is determined according to the positioning information. For example, one can ascertain: the vehicle is currently already in the tunnel or there is a tunnel section located in the direction of travel of the vehicle and at a distance D1 from the vehicle.
It is then determined whether the vehicle is driving into or out of the weak signal road segment based on the location information, according to step 104. By the invention, the weak signal section can be accurately judged, so that the playing of the multimedia content can be intervened or controlled at a proper moment.
Then, according to step 105, if the vehicle is or is about to be driven into the weak signal section or the vehicle is or is about to be driven out of the weak signal section, a corresponding control of the playing of the multimedia content is issued. Here, the controlling of the playing of the multimedia content includes: pause playing, resume playing, increase volume, decrease volume, switch signal sources and send prompt messages. For example, the control instruction may be to stop playing the content signal received from the signal source S1, to send a prompt voice to an occupant through a speaker, or to display a screen prompt message through a display screen. Therefore, the doubtful that the contents of the radio cannot be played normally by people in the vehicle can be eliminated, and noise caused by signal deterioration are avoided. For example, when the vehicle is traveling out of the tunnel 20, the content of the signal source S1 may be resumed and played. Therefore, the influence of different audio signal sources on signal receiving according to different road conditions is intelligently and automatically switched, and the user experience of the vehicle-mounted multimedia system is greatly improved.
In addition, the playing content can also be switched to the content signal of the other signal source S2 (see fig. 3) of a preset standby playing. The other signal source S2 is connected to the vehicle-mounted system by wire or by short-distance wireless, does not depend on long-distance wireless signal propagation, is not affected by the tunnel segment, and can continue to play the media content.
According to an advantageous embodiment, in step 104, additionally: acquiring the length D2 of the tunnel section from the navigation map; and determines whether the tunnel segment is a weak signal segment by comparing the length D2 of the tunnel segment with a tunnel length threshold.
In some cases, relatively short tunnel segments do not affect the radio signal, for example tunnels or culverts of only 15 meters in length. The tunnel or culvert length is too short to affect the wireless signal reception strength. Particularly FM signals, are high in frequency and can travel a short distance through the tunnel. The received signal does not deteriorate so much that it cannot be played out within this distance. In this case, although there is a culvert or tunnel section, it should not be determined or judged as the weak signal section. It has been found that for fm broadcasts, the strength of the radio signal is affected only when the length of the tunnel segment is greater than 50 meters (and in some cases greater than 300 meters).
In view of the above situation, the vehicle-mounted system of the present invention is preset with a tunnel length threshold, which may range from 50 meters to 300 meters. Preferably, the tunnel length threshold may be 40 meters, 50 meters, 60 meters, 70 meters, 80 meters, 100 meters, 200 meters or 300 meters. The in-vehicle system may obtain the length D2 of the tunnel segment 20 from the electronic navigation map. Then, whether the tunnel belongs to the weak signal section is judged by comparing the tunnel section length D2 with a preset tunnel length threshold. If the length D2 of the tunnel segment 20 is longer than the tunnel length threshold, the tunnel segment is a weak signal segment.
In an advantageous embodiment, the detection result of the sensor module in the vehicle is detected, and the determination of whether the vehicle is moving into or out of the weak signal section is carried out using the positioning information in combination with the detection result. In particular, the sensor module is a camera and/or a brightness sensor. Particularly advantageously, the presence of weak signal sections and/or traffic signs associated with weak signal sections is detected in the image captured by the camera; and/or detecting a change in brightness by a brightness sensor.
Fig. 3 is a block diagram of an apparatus 200 for controlling multimedia playback in a vehicle according to an embodiment of the present invention.
The apparatus 200 for controlling multimedia playback in a vehicle includes a receiving module 201 for receiving a signal of multimedia content for playback from a signal source S1, the content signal being audio or video; a map module 202 for invoking a navigation map; the positioning module 203 is used for acquiring positioning information of the vehicle on a navigation map; a determining module 204, configured to determine whether the vehicle enters or exits the weak signal road segment according to the positioning information; and a control module 205 for controlling the playing of the multimedia content accordingly in case of entering or exiting the weak signal section.
As shown in fig. 3, the device 200 for controlling multimedia playback in a vehicle receives a signal source S1 via a radio signal transmission 30, which signal may typically be an FM/AM radio broadcast or a DVB video broadcast. In the embodiment shown in fig. 3, the apparatus 200 for controlling multimedia playing in a vehicle is further connected with another signal source S2 through a wired transmission mode (e.g. a car-mounted CD) or a short-range wireless communication mode (e.g. Bluetooth).
In recent years, short-range wireless communication connection, such as bluetooth technology, has been applied to in-vehicle devices, and therefore, even when the mobile phone is left in, for example, a bag or a pocket, audio and video contents stored in advance in the smartphone can be played back through the in-vehicle system. Playing these audio and video contents is also not affected by the weakening of the radio signal in the tunnel.
Preferably, the control module can pause playing, resume playing, increase volume, decrease volume, switch signal sources, and send prompt messages, and the control module 205 can pause playing, resume playing, increase volume, decrease volume, switch signal sources, and send prompt messages.
Particularly preferably, the determining module 204 is further configured to: acquiring the length D2 of the tunnel section from the navigation map; and determines whether the tunnel segment is a weak signal segment by comparing the length D2 of the tunnel segment with a tunnel length threshold.
Fig. 4 is a block diagram of another apparatus for controlling multimedia playback in a vehicle according to an embodiment of the present invention. There is shown an apparatus 200 according to the invention, for which reference is made to the description of fig. 3 for the receiving module 201, the mapping module 202, the positioning module 203, the determining module 204 and the control module 205.
The apparatus 200 additionally comprises a detection module 206, the detection module 206 is configured to obtain a detection result of a sensing module 400 (see fig. 5) in the vehicle, and the determination module 204 determines whether the vehicle enters or exits the weak signal section by combining the positioning information with the detection result.
Preferably, the sensing module 400 may be a camera and/or a brightness sensor. It is particularly preferred to detect the presence of weak signal sections and/or traffic signs 30 associated with weak signal sections in the image captured by the camera. In the case that the sensing module is a camera, it can detect whether there is a weak signal section, for example, whether there is a tunnel, a valley, a bridge, an underground garage, etc. in front, which can be realized by detecting whether there are features of these scenes in the image through graphic processing; it is also possible to detect whether there is a traffic sign 30 associated with a weak signal road segment, for example, whether there is a traffic sign indicating a tunnel, a valley, a bridge, an underground garage, etc. in the captured image; or a combination of both.
Preferably, the change in brightness is detected by a brightness sensor. A brightness sensor is used as the sensing module. The brightness sensor can detect a change in brightness, which is practical especially in the case of daytime vehicles entering a tunnel or underground garage. Since the brightness of the surroundings of the vehicle changes rapidly in the process, it is immediately known that the vehicle has moved into or out of the tunnel or underground garage.
Fig. 5 shows a block diagram of a vehicle multimedia system of an embodiment of the present invention. The in-vehicle multimedia system comprises at least a device 200 for controlling multimedia playback in a vehicle as described above and at least one speaker and/or at least one display 300. Furthermore, it is particularly advantageous that the device 200 for controlling multimedia playback in a vehicle is also connected to a sensor module 400 arranged in the vehicle, so that the detection module 206 in the device 200 acquires the detection result of the sensor module 400 in the vehicle, and the determination module 205 then determines whether the vehicle enters or exits the weak signal section in combination with the location information and the detection result.
The features disclosed in the present document can be essential for the implementation of the embodiments in terms of different embodiments and can be implemented both individually and in any combination. The invention is not limited to the embodiments shown but comprises or extends to all technical equivalents that may fall within the scope and spirit of the appended claims.
The present invention may also be a computer program product. The computer program product may include a computer-readable storage medium having computer-readable program instructions thereon for causing a processor to perform various aspects of the invention.
The computer readable storage medium may be a tangible device that can retain and store instructions for use by an instruction execution device. The computer readable storage medium may be, for example, but is not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing.
The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In some embodiments, electronic circuitry, including, for example, programmable logic circuitry, Field Programmable Gate Arrays (FPGAs), or Programmable Logic Arrays (PLAs), may execute computer-readable program instructions to perform aspects of the present invention by utilizing state information of the computer-readable program instructions to personalize the electronic circuitry.
The computer readable storage medium may be machine readable or computer readable. Thus, in some embodiments, a computer-readable storage medium comprises a data carrier having executable instructions that can cooperate with a programmable computer system or programmable hardware components such that one of the methods described herein is performed. An embodiment is thus a data carrier, a digital storage medium or a computer-readable storage medium, on which a program for implementing one of the methods described herein is recorded.
Claims (14)
1. A method for controlling multimedia playback in a vehicle, the method comprising:
receiving a signal for the played multimedia content from a signal source (S1);
calling a navigation map;
acquiring positioning information of a vehicle on a navigation map;
acquiring a detection result of a sensing module in a vehicle, wherein the sensing module is a camera and/or a brightness sensor, detecting whether a weak signal road section and/or a traffic sign related to the weak signal road section exist in an image shot by the camera, and/or detecting light and shade change through the brightness sensor;
determining whether the vehicle enters or exits the weak signal road section by combining the positioning information and the detection result;
in the case where the vehicle enters or exits the weak signal section, the playing of the multimedia content is controlled accordingly.
2. The method of claim 1, wherein the signal from the signal source (S1) is a radio broadcast signal or a wireless communication signal.
3. The method of claim 1 or 2, wherein the controlling of the playing of the multimedia content comprises: pause playing, resume playing, increase volume, decrease volume, switch signal sources and send prompt messages.
4. A method according to claim 1 or 2, wherein the weak signal section is a tunnel section.
5. The method of claim 4, wherein the method further comprises:
acquiring the length of the tunnel section from the navigation map (D2); and is
By comparing the length of the tunnel segment (D2) to a tunnel length threshold, it is determined whether the tunnel segment is a weak signal segment.
6. An apparatus for controlling multimedia playback in a vehicle, the apparatus comprising:
a receiving module (201) for receiving a signal for the played multimedia content from a signal source (S1);
a map module (202) for invoking a navigation map;
the positioning module (203) is used for acquiring positioning information of the vehicle on a navigation map;
the detection module is used for acquiring a detection result of a sensing module in the vehicle, wherein the sensing module is a camera and/or a brightness sensor, detects whether a weak signal road section and/or a traffic sign related to the weak signal road section exist in an image shot by the camera, and/or detects light and shade change through the brightness sensor;
a determining module (204) for determining whether the vehicle enters or exits the weak signal road section by combining the positioning information and the detection result;
and the control module (205) is used for controlling the playing of the multimedia content correspondingly under the condition of driving in or driving out the weak signal road section.
7. The apparatus of claim 6, wherein the content signal from the signal source (S1) is a radio broadcast signal or a wireless communication signal.
8. The apparatus of claim 6 or 7, wherein the control module is capable of pausing playback, resuming playback, increasing volume, decreasing volume, switching signal sources, and issuing a prompt message.
9. The apparatus of claim 6 or 7, wherein the weak signal section is a tunnel section.
10. The apparatus of claim 9, wherein the determination module is further to:
acquiring the length of the tunnel section from the navigation map (D2); and is
By comparing the length of the tunnel segment (D2) with a tunnel length threshold, it is determined whether the tunnel segment is a weak signal segment.
11. An in-vehicle multimedia system, the system comprising:
-a device for controlling multimedia playback in a vehicle according to claims 6 to 10, and
-at least one speaker and/or at least one display.
12. The in-vehicle multimedia system of claim 11, wherein the in-vehicle multimedia system comprises a sensing module disposed in a vehicle.
13. A vehicle comprising an in-vehicle multimedia system as claimed in claim 11 or 12.
14. A computer-readable storage medium having executable instructions that, when executed, cause a computer to perform the method of one of claims 1 to 5.
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