CN108259103B - Emergency broadcasting method, system, terminal and computer readable medium - Google Patents
Emergency broadcasting method, system, terminal and computer readable medium Download PDFInfo
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- CN108259103B CN108259103B CN201810142774.6A CN201810142774A CN108259103B CN 108259103 B CN108259103 B CN 108259103B CN 201810142774 A CN201810142774 A CN 201810142774A CN 108259103 B CN108259103 B CN 108259103B
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- 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
- H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/69—Optical systems
Abstract
The embodiment of the invention discloses an emergency broadcasting method, a system, a terminal and a computer readable medium, wherein the method comprises the following steps: receiving an optical signal from a passive optical network and converting the optical signal into a digital signal; judging whether the digital signal is an emergency broadcast signal; if so, converting the digital signal into an audio signal and playing the audio signal. The emergency broadcasting method, the emergency broadcasting system, the emergency broadcasting terminal and the computer readable medium provided by the embodiment of the invention ensure the timeliness and the accuracy of the emergency broadcasting, have large transmission capacity and do not need the network reconstruction of the emergency broadcasting.
Description
Technical Field
The embodiment of the invention relates to an emergency broadcasting technology, in particular to an emergency broadcasting method, an emergency broadcasting system, a terminal and a computer readable medium.
Background
The emergency broadcast is a rapid and fast information transmission channel provided for the public when sudden public crisis such as serious natural disaster, sudden event, public health and social security occurs. The real-time accurate emergency broadcast can effectively guide people to evacuate and avoid risks, and the loss of lives and properties is reduced to the minimum.
Currently, the main emergency broadcast system forms are divided into the following three types: a ground coaxial line emergency broadcasting system based on Cable digital television broadcasting (DVB-C); a Digital Television Terrestrial broadcasting transmission system frame structure, channel coding and modulation (DTMB) based Terrestrial wireless emergency broadcasting system; radio frequency modulation emergency broadcasting system based on Radio Digital System (RDS).
The ground coaxial line emergency broadcasting system based on DVB-C has the following disadvantages: firstly, an emergency broadcast terminal is a terminal combined with a set top box service, wherein only part of emergency broadcast terminals are internally provided with horn circuits, so that the emergency broadcast service can be realized; secondly, due to the limitation of standby power consumption of the set top box, emergency broadcasting cannot be responded in time in a true standby mode, and important information cannot be broadcast in time easily; third, the coaxial transmission scheme employed has bandwidth limitations, resulting in lower transmission capacity.
The disadvantages of the terrestrial wireless emergency broadcasting system based on the DTMB are as follows: firstly, the emergency broadcast terminal is also a terminal combined with the set-top box service, so that only part of terminals with built-in horn circuits can realize the emergency broadcast service, and the emergency broadcast cannot be responded in time in a true standby mode; secondly, certain wireless signal interference problem exists in wireless transmission, so that emergency information cannot be accurately broadcast; third, wireless transmission has bandwidth limitations, resulting in a smaller transmission capacity.
The radio frequency modulation emergency broadcasting system based on the RDS has the following defects: firstly, an emergency broadcast terminal is an emergency broadcast terminal based on Frequency Modulation (FM), and the terminal is a sound device, is not a normal power supply device and is closed in idle time, so that emergency information cannot be broadcast in time; secondly, wireless frequency modulation signal transmission is adopted, so that the problems of signal coverage area and wireless signal interference exist, and the emergency information cannot be accurately broadcast; third, the wireless fm method has a bandwidth limitation, resulting in a smaller transmission capacity.
In summary, the emergency broadcast cannot be broadcast in time due to the fact that the terminal is powered off in standby power consumption or idle time; the ground wireless emergency broadcast system based on the DTMB and the wireless frequency modulation emergency broadcast system based on the RDS are both in wireless signal transmission, so that the problem of wireless signal interference exists, and the emergency broadcast cannot be accurately broadcast; and the above three transmission modes all have bandwidth limitation, resulting in smaller transmission capacity.
Disclosure of Invention
In view of this, embodiments of the present invention provide an emergency broadcast method, system, terminal, and computer readable medium based on a broadcast passive optical network, so that timeliness and accuracy of emergency broadcast are ensured, and transmission capacity is large without requiring network reconstruction of emergency broadcast.
In a first aspect, an embodiment of the present invention provides an emergency broadcast method, including:
receiving an optical signal from a passive optical network and converting the optical signal into a digital signal;
judging whether the digital signal is an emergency broadcast signal;
and if so, converting the digital signal into an audio signal and playing the audio signal.
In a second aspect, an embodiment of the present invention provides a system, including:
the system comprises an emergency front end, an optical distribution network and an emergency terminal;
the emergency front end is used for converting an emergency broadcast signal into an optical signal and accessing the optical signal to a passive optical network, wherein the emergency broadcast signal comprises a network protocol (IP) data packet and a code stream (TS) data packet;
the optical distribution network is used for distributing the optical signals to the emergency terminals, wherein the optical distribution network comprises an Ethernet optical distribution network and a gigabit optical distribution network, and the distribution mode comprises a single-fiber three-wave mode and a double-fiber three-wave mode;
the emergency terminal comprises:
the optical signal receiving module is used for receiving an optical signal from a passive optical network and converting the optical signal into a digital signal;
the signal judgment module is used for judging whether the digital signal is the emergency broadcast signal;
and the audio playing module is used for converting the digital signal into an audio signal and playing the audio signal through a loudspeaker when the digital signal is the emergency broadcast signal.
In a third aspect, an embodiment of the present invention provides a terminal, including:
one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement an emergency broadcast method as described in any embodiment of the invention.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements an emergency broadcast method according to any embodiment of the present invention.
According to the emergency broadcasting method, the terminal and the computer readable medium, the terminal is uninterrupted network equipment with a built-in loudspeaker, and timeliness of emergency broadcasting is guaranteed; the adoption of optical fiber transmission ensures large transmission capacity and strong anti-interference capability, and ensures the accuracy of emergency broadcasting; and the emergency broadcast is carried out based on the broadcasting passive optical network, the reconstruction of the emergency broadcast network is not needed, and the authentication, the partition and other management of the emergency broadcast can be realized by utilizing the existing network management system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of an emergency broadcast method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an emergency broadcasting system according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of an emergency terminal for receiving a dual-fiber three-wave optical signal in an emergency broadcasting system structure according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of an emergency terminal receiving a single-line three-wave optical signal in an emergency broadcasting system structure according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of a two-fiber three-wave system in an emergency broadcasting system structure according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of a three-fiber system in an emergency broadcasting system structure according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a terminal according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through embodiments with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 is a flowchart of an emergency broadcast method according to an embodiment of the present invention, where this embodiment is applicable to emergency broadcast, and the method may be implemented by a terminal, for example, an Optical Network Terminal (ONT), and may be implemented by software and/or hardware in the terminal. Referring to fig. 1, the emergency broadcasting method includes the steps of:
and S110, receiving the optical signal from the passive optical network, and converting the optical signal into a digital signal.
The Passive Optical Network (PON) is a point-To-multipoint Optical Fiber transmission and access technology, a broadcast mode is used in a downlink, a time division multiple access mode is used in an uplink, tree, star, bus and other topological structures can be flexibly formed, and only a simple Optical splitter needs To be installed at an Optical branch point.
The PON system structure includes an Optical Line Terminal (OLT), an Optical Network Unit (ONU), and an Optical Distribution Network (ODN), and the OLT and the ONU are connected by the ODN. Different data link layer technologies and physical layer PON technologies combine to form different PON technologies, such as: ethernet + PON forms EPON, and Asynchronous Transfer Mode (ATM)/gigabit network Encapsulation format (G-PON Encapsulation Mode, GEM) + PON forms GPON.
The broadcast and television FTTH technology bearing service can be divided into a broadcast and television service and a broadband access service. That is, the optical signals transmitted in the optical fiber of the PON include optical signals with three wavelengths, which are broadcast television optical signals, downlink broadband data optical signals, and uplink broadband data optical signals, respectively. The transmission modes of the three wavelength optical signals can be divided into a single-fiber three-wave mode and a double-fiber three-wave mode. The single-fiber three-wave optical combiner combines three optical signals with different wavelengths into one optical fiber signal by using an optical multiplexer, and the optical fiber signal reaches a user family through the same physical transmission channel; the dual-fiber three-wave is that the broadcast television optical signal and the broadband data optical signal are respectively transmitted in different fiber cores and respectively reach the user family through different physical transmission channels.
The optical signals received from the PON are broadcast television optical signals and downlink broadband data optical signals, and the broadcast television optical signals and the downlink broadband data optical signals can be converted into digital signals to determine whether the digital signals are emergency broadcast signals.
Optionally, the receiving an optical signal from a passive optical network includes:
receiving a first wavelength optical signal from a passive optical network through a cable television CATV interface;
receiving a second wavelength optical signal from the passive optical network through a Passive Optical Network (PON) interface;
or, receiving the composite wave optical signal from the passive optical network through the CATV interface;
and the optical branching device is used for branching the combined optical signal to obtain a first wavelength optical signal and a second wavelength optical signal.
When the transmission mode is a dual-fiber triple wave, the terminal receives optical signals from the two optical fibers through the two ports respectively. Specifically, the optical signal with the first wavelength, that is, the broadcast television optical signal, is received through the CATV interface; and receiving a second wavelength optical signal, namely a downlink broadband data optical signal, through the PON interface.
When the transmission mode is single-fiber triple-wave, the terminal can receive the combined-wave optical signal through a port at first, and then the combined-wave optical signal is subjected to wave splitting through the optical splitter. Specifically, the combined optical signal may be received through a CATV interface, and the combined optical signal is demultiplexed into a first wavelength optical signal and a second wavelength optical signal through an optical demultiplexer, that is, a broadcast television optical signal and a downlink broadband data optical signal may be obtained through demultiplexing.
Optionally, the converting the optical signal into a digital signal includes:
converting the optical signal with the first wavelength into a radio frequency signal through an optical-to-radio frequency circuit;
demodulating the radio frequency signal into an intermediate frequency signal through a tuner;
and converting the intermediate frequency signal into a code stream TS data packet through a set top box processor STB CPU.
The process of converting the optical signal with the first wavelength into the digital signal can be understood as a process of converting the optical signal with the broadcast television into the broadcast television data, that is, a process of converting the optical signal with the broadcast television into a Transport Stream (TS) packet. The optical signal can be converted into a radio frequency signal through an optical-to-radio frequency circuit, the radio frequency signal is demodulated into an intermediate frequency signal through a tuner, and the intermediate frequency signal is converted into a TS packet through a Set-Top-Box Central Processing Unit (STB CPU).
Optionally, the converting the optical signal into a digital signal further comprises:
and converting the optical signal with the second wavelength into a network protocol IP data packet through a passive optical network processor PON CPU.
The process of converting the optical signal with the second wavelength into the digital signal may be understood as a process of converting the optical signal with the downlink broadband data into broadband data, that is, a process of converting the optical signal with the downlink broadband data into an Internet Protocol (IP) data packet. The downstream broadband data Optical signal may be converted into an IP data packet by a Passive Optical Network Central Processing Unit (PON CPU). Wherein, the PON CPU can be processed by an RTL 9603 chip.
The terminal is through turning into digital signal with the received optical signal, can be used for further judging whether to include emergent broadcast signal in the digital signal, when including emergent broadcast signal, can broadcast emergent broadcast signal with the loudspeaker that the terminal was taken certainly, because of the terminal is uninterrupted power network equipment to the promptness of emergent broadcast has been guaranteed.
And S120, judging whether the digital signal is an emergency broadcast signal.
The determining whether the digital signal is an emergency broadcast signal may include determining whether a TS packet or an IP packet is an emergency broadcast signal.
Optionally, when the digital signal is a TS data packet, the STB CPU may determine whether a packet identifier of the TS data packet is a packet identifier of an emergency broadcast signal.
Optionally, when the digital signal is an IP data packet, the PON CPU may determine whether the identification information of the IP data packet is identification information of an emergency broadcast signal.
And S130, if so, converting the digital signal into an audio signal and playing the audio signal.
The converting of the digital signal into the audio signal may include converting TS packets or converting IP packets into the audio signal.
Optionally, when the digital signal is a TS packet, the TS packet may be decoded into an audio signal by the STB CPU.
Optionally, when the digital signal is an IP data packet, the IP data packet may be sent to the STB CPU; the IP packets are converted to audio signals by the STB CPU. The STB CPU can select HI3716 series chip for processing.
The digital signals corresponding to the emergency broadcast signals are converted into the audio signals, and the audio signals are played, so that a user can obtain the emergency broadcast information in time.
Optionally, when the digital signal is an IP data packet, after determining whether the digital signal is an emergency broadcast signal, the method may further include:
if so, the IP data packet is sent to the personal terminal through the PON CPU, so that the personal terminal converts the IP data packet into an audio signal and plays the audio signal.
The personal terminal device is a terminal device which can surf the internet through a network cable or WIFI, and can comprise a mobile phone, a personal computer, a tablet computer, an intelligent sound box and other terminal devices. The PON CPU can be connected with the personal terminal through a network port or a WIFI mode, and therefore the IP data packet is transmitted. The personal terminal can convert the IP data packet into an audio signal and play the audio signal, and can be informed of emergency broadcasting by a user using the personal terminal.
By pushing the IP data packet corresponding to the emergency broadcast signal to the personal terminal, the user can receive the emergency broadcast signal at a place slightly far away from the terminal through the personal terminal, so that the broadcast mode of the emergency broadcast signal is increased, and the probability of the emergency broadcast being known by the user is improved.
Optionally, after converting the digital signal into the audio signal, the method further includes:
judging whether the number of the audio signals waiting to be played is greater than 1;
if yes, judging the priority of the audio signals waiting to be played, and playing the audio signals according to the priority sequence.
When the terminal receives and converts the optical signals to obtain audio signals corresponding to a plurality of emergency broadcasts, the terminal can judge priority information carried in the audio signals waiting to be played in a queue, sort the audio signals according to the level of the priority information, and play the audio signals in sequence; when the levels of the priority information are the same, sequencing and playing can be carried out according to the sequence of the obtained audio signals; in addition, when the priority information is the same and the audio signals should be the same, only the audio signal obtained first may be played.
For example, when the audio data obtained from the TS packet conversion and the audio data obtained from the IP packet are the same audio data, the audio data obtained first may be determined as an audio signal with a higher priority, and optionally, the audio signal obtained after the audio data is not played.
By judging the priority of the audio signal waiting for playing, the user can preferentially obtain the emergency broadcast information with higher priority level, so that the user is guided to preferentially evacuate and avoid danger according to the emergency broadcast information with higher priority level, and the loss of lives and properties is reduced to the lowest.
Optionally, playing the audio signal includes: stopping playing the audio signal when the audio signal is played circularly for a preset time or a preset number of times; or stopping playing the audio signal when receiving the stop instruction.
The playing audio signal may be a signal played in real time, that is, the audio signal is played once while being received; the playing can also be a circular playing, wherein the playing can be stopped when the circular playing reaches a preset number of times or preset time, or the playing can be stopped when a stop instruction is received; the stop instruction can be sent to the terminal equipment by the user side, or can be sent to the terminal equipment by the emergency front end when the emergency dangerous case is confirmed to be eliminated.
The audio signal that emergency broadcast corresponds can broadcast in real time, also can circulate the broadcast, can stop when satisfying the circulation stop condition, also can stop according to the stop command to increased the audio signal broadcast mode, can optimize emergency broadcast system performance, also can satisfy the diversified demand of user simultaneously.
In the emergency broadcasting method provided by the embodiment, the terminal is a uninterruptible power network device with a built-in loudspeaker, so that the timeliness of emergency broadcasting is ensured; the adoption of optical fiber transmission ensures large transmission capacity and strong anti-interference capability, and ensures the accuracy of emergency broadcasting; and the emergency broadcast is carried out based on the broadcasting passive optical network, the reconstruction of the emergency broadcast network is not needed, and the authentication, the partition and other management of the emergency broadcast can be realized by utilizing the existing network management system.
Example two
Fig. 2 is a schematic structural diagram of an emergency broadcast system according to a second embodiment of the present invention, where the second embodiment is applicable to emergency broadcast. The system provided by the embodiment can execute the emergency broadcasting method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Referring to fig. 2, the emergency broadcasting system provided in the present embodiment includes: an emergency front end 210, an optical distribution network 220, and an emergency terminal 230;
the emergency front end 210 is configured to convert an emergency broadcast signal into an optical signal, and access the optical signal to a passive optical network, where the emergency broadcast signal includes a network protocol IP data packet and a code stream TS data packet;
an optical distribution network 220, configured to distribute an optical signal to an emergency terminal, where the optical distribution network includes an ethernet optical distribution network and a gigabit optical distribution network, and the distribution manner includes a single fiber three wave and a double fiber three wave;
an emergency terminal 230, comprising:
an optical signal receiving module 231, configured to receive an optical signal from the passive optical network and convert the optical signal into a digital signal;
a signal judgment module 232, configured to judge whether the digital signal is an emergency broadcast signal;
and an audio playing module 233, configured to convert the digital signal into an audio signal and play the audio signal when the digital signal is an emergency broadcast signal.
Preferably, fig. 3 is a schematic structural diagram of an emergency terminal in an emergency broadcasting system structure for receiving a dual-fiber three-wave optical signal according to a second embodiment of the present invention.
The Optical signal receiving module may correspond to a CATV interface, a PON interface, an Optical to radio frequency circuit, a Bi-directional Optical Sub-Assembly (BOSA), a STB CPU, and a PON CPU. Receiving a first wavelength optical signal, namely a broadcast television optical signal, through a CATV interface; and receiving a second wavelength optical signal, namely a downlink broadband data optical signal through the PON interface, and transmitting a light-emitting signal to the PON CPU through the BOSA. Converting the optical signal with the first wavelength into a radio frequency signal through an optical-to-radio frequency circuit; demodulating the radio frequency signal into an intermediate frequency signal through a tuner; and converting the intermediate frequency signal into a code stream TS data packet through the STB CPU. And converting the optical signal with the second wavelength into a network protocol IP data packet through the PON CPU.
The signal determination module may correspond to an STB CPU and a PON CPU. When the digital signal is a TS data packet, whether the packet identifier of the TS data packet is the packet identifier of the emergency broadcast signal can be judged through the STB CPU. When the digital signal is an IP data packet, whether the identification information of the IP data packet is the identification information of the emergency broadcast signal can be judged through the PON CPU.
The audio playing module may correspond to an STB CPU, a Power Amplifier (PA), and a speaker. When the digital signal is a TS packet, the TS packet may be decoded into an audio signal by the STB CPU. When the digital signal is an IP data packet, the IP data packet can be sent to the STB CPU; the IP packets are converted to audio signals by the STB CPU. The audio signal is amplified by the PA and broadcast by the speaker.
In addition, the emergency terminal may further include a Radio Frequency Out (RF Out) interface or a High Definition Multimedia Interface (HDMI), which is used for accessing a coaxial television signal or a High Definition television signal of a set-top box at the user side, and may be used by a set-top box module in a user family to play a television program; the system also comprises a wired network port and a WIFI module, which are used for transmitting the IP data packet for the personal terminal to perform broadband access related services; the system also can comprise DDR and FLASH memories which are used for storing running programs, running data or emergency broadcast audio data of the STB CPU and the PON CPU system.
Preferably, fig. 4 is a schematic structural diagram of an emergency terminal in an emergency broadcasting system structure for receiving a single-fiber three-wave optical signal according to a second embodiment of the present invention. The terminal is different from the emergency terminal shown in fig. 3 in that the emergency terminal firstly receives the combined optical signal through the CATV port, and then the combined optical signal is subjected to wave splitting through the optical splitter, so as to obtain the optical signal with the first wavelength and the optical signal with the second wavelength. The subsequent processing of the optical signals with the first wavelength and the optical signals with the second wavelength is the same as the processing of the optical signals with the first wavelength and the optical signals with the second wavelength by the emergency terminal shown in fig. 3.
Fig. 5 is a schematic diagram of a two-fiber three-wave system in an emergency broadcasting system structure according to a second embodiment of the present invention.
In the emergency front end, on one hand, the emergency broadcast information platform converts the emergency information into an IP data packet and transmits the IP data packet to an IP metropolitan area network. The OLT acquires an IP data packet corresponding to the emergency information and a broadband service IP data packet from an IP metropolitan area network, converts the IP data packet into an optical signal and accesses the optical signal to an optical distribution network, wherein a downlink IP data packet is converted into an optical signal with the wavelength of lambda 2, and an uplink IP data packet is converted into an optical signal with the wavelength of lambda 3. And on the other hand, the emergency broadcast information platform sends the emergency information to the broadcast television service platform, the broadcast television service platform converts the emergency information into a TS data packet, converts the TS data packet together with a normal broadcast television TS data packet into an optical signal with the wavelength of lambda 1, and the optical signal is accessed to an optical distribution network through an optical transmitter and optical fiber amplification. The management such as authentication and partition of emergency broadcast can be realized through a network management system. The IP metropolitan area network can be connected with the Internet to acquire data in the Internet.
In an optical distribution network, optical signals having a wavelength λ 1 and optical signals having a wavelength λ 2/λ 3 are transmitted through different optical fibers. On an optical fiber for transmitting an optical signal with a wavelength of λ 1, an optical splitter splits the optical signal with the wavelength of λ 1 and transmits the optical signal to a plurality of emergency terminals. On an optical fiber for transmitting optical signals with the wavelength of lambda 2/lambda 3, an optical splitter splits the optical signals with the wavelength of lambda 2 and transmits the optical signals to a plurality of emergency terminals; and receives the optical signal with the wavelength lambda 3 sent by the emergency terminal.
In the emergency terminal, the terminal receives an optical signal with the wavelength of lambda 1 and an optical signal with the wavelength of lambda 2 from two optical fibers through two ports respectively; converting the optical signal with the wavelength of lambda 1 into a TS data packet, and converting the optical signal with the wavelength of lambda 2 into an IP data packet; judging whether the TS data packet or the IP data packet is an emergency broadcast signal; and when the digital signal is an emergency broadcast signal, converting the digital signal into an audio signal and playing the audio signal.
Fig. 6 is a schematic diagram of a three-fiber system in an emergency broadcasting system structure according to a second embodiment of the present invention. The single-fiber three-wave and the double-fiber three-wave are different in that in an optical distribution network, optical signals with wavelengths of lambda 1, lambda 2 and lambda 3 are multiplexed to the same optical fiber signal through an optical multiplexer and reach an emergency terminal through the same physical transmission channel. Correspondingly, in the emergency terminal, the terminal may first receive the combined optical signal through one port, and then perform wavelength splitting on the combined optical signal through the optical splitter, so as to obtain an optical signal with a wavelength λ 1 and an optical signal with a wavelength λ 2.
The emergency broadcast system provided by the embodiment performs emergency broadcast based on the broadcast passive optical network, does not need to rebuild an emergency broadcast network, and can realize the management of authentication, partition and the like of the emergency broadcast by using the existing network management system; the adoption of optical fiber transmission ensures large transmission capacity and strong anti-interference capability, and ensures the accuracy of emergency broadcasting; and the terminal is uninterrupted network equipment with a built-in loudspeaker, so that the timeliness of emergency broadcasting is ensured.
EXAMPLE III
The embodiment provides a terminal which can be used for emergency broadcasting. Fig. 7 is a schematic structural diagram of a terminal according to a third embodiment of the present invention. Referring to fig. 7, the terminal includes:
one or more processors 710;
a memory 720 for storing one or more programs;
when executed by the one or more processors 710, the one or more programs cause the one or more processors 710 to implement the emergency broadcast method as set forth in one embodiment.
FIG. 7 illustrates an example of a processor 710; the processor 710 and the memory 720 may be connected by a bus or other means, such as by a bus in FIG. 7.
The memory 720, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the emergency broadcast method in the embodiment of the present invention. The processor 710 performs various functional applications of the terminal and data processing by executing software programs, instructions, and modules stored in the memory 720, i.e., implements the emergency broadcasting method described above.
The memory 720 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 720 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 720 may further include memory located remotely from the processor 710, which may be connected to the terminal over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
In addition, according to different forms of the terminal, in addition to the processor 710 and the memory 720, the terminal may further include other modules or structures, for example, the terminal has an RF OUT interface or an HDMI interface, which is used for accessing a coaxial television signal or a high definition television signal of a set-top box at a user side, and the set-top box module in a user's home may be used for playing a television program; the terminal has an emergency broadcast broadcasting function, and also comprises a loudspeaker, a power amplifier and other related devices; the terminal needs to receive optical signals and further comprises a BOSA component for receiving and transmitting the optical signals; the terminal is a network terminal device with broadband access, and also comprises a wired network port and a WIFI module, which are used for transmitting IP data packets for the personal terminal to perform broadband access related services.
The terminal and the emergency broadcasting method provided by the first embodiment belong to the same inventive concept, and technical details that are not described in detail in the first embodiment can be referred to in the first embodiment, and the first embodiment have the same beneficial effects.
Example four
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements an emergency broadcast method as set forth in one embodiment.
The computer-readable storage medium provided by the present embodiment is the same as the emergency broadcast method provided by the first embodiment, and the technical details that are not described in detail in the present embodiment can be referred to in the first embodiment.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (7)
1. An emergency broadcasting method is applied to a non-interrupted optical network terminal with a built-in loudspeaker, and comprises the following steps:
receiving an optical signal from a passive optical network and converting the optical signal into a digital signal;
judging whether the digital signal is an emergency broadcast signal;
if so, converting the digital signal into an audio signal, and playing the audio signal through a loudspeaker;
wherein the receiving of the optical signal from the passive optical network comprises:
receiving a first wavelength optical signal from a passive optical network through a cable television CATV interface; receiving a second wavelength optical signal from the passive optical network through a Passive Optical Network (PON) interface;
or, receiving the composite optical signal from the passive optical network through the CATV interface; splitting the combined optical signal through an optical splitter to obtain the first wavelength optical signal and the second wavelength optical signal;
wherein converting the optical signal to a digital signal comprises:
converting the optical signal with the first wavelength into a radio frequency signal through an optical-to-radio frequency circuit; demodulating the radio frequency signal into an intermediate frequency signal through a tuner; converting the intermediate frequency signal into a code stream TS data packet through a set top box processor STB CPU;
correspondingly, the determining whether the digital signal is an emergency broadcast signal includes:
judging whether the packet identifier of the TS data packet is the packet identifier of the emergency broadcast signal or not by the STB CPU;
correspondingly, the converting the digital signal into an audio signal includes: decoding the TS data packet into an audio signal through an STB CPU;
wherein converting the optical signal to a digital signal further comprises:
converting the second wavelength optical signal into a network protocol IP data packet through a passive optical network processor PON CPU;
correspondingly, the determining whether the digital signal is an emergency broadcast signal includes:
judging whether the identification information of the IP data packet is identification information of an emergency broadcast signal or not through the PON CPU;
correspondingly, the converting the digital signal into an audio signal includes: sending the IP data packet to the STBCPU; and converting the IP data packet into an audio signal through the STB CPU.
2. The method of claim 1, further comprising, after said determining whether the digital signal is an emergency broadcast signal:
and if so, sending the IP data packet to a personal terminal through the PON CPU so that the personal terminal converts the IP data packet into an audio signal and plays the audio signal.
3. The method according to any one of claims 1-2, further comprising, after said converting said digital signal into an audio signal:
judging whether the number of the audio signals waiting to be played is greater than 1;
if yes, judging the priority of the audio signal waiting to be played, and playing the audio signal according to the priority sequence.
4. The method of any of claims 1-2, wherein said playing said audio signal comprises:
stopping playing the audio signal when the cyclic playing reaches the preset time or the preset times;
or stopping playing the audio signal when receiving the stop instruction.
5. An emergency broadcast system, comprising: the system comprises an emergency front end, an optical distribution network and an emergency terminal;
the emergency front end is used for converting an emergency broadcast signal into an optical signal and accessing the optical signal to a passive optical network, wherein the emergency broadcast signal comprises a network protocol (IP) data packet and a code stream (TS) data packet;
the optical distribution network is used for distributing the optical signals to the emergency terminals, wherein the optical distribution network comprises an Ethernet optical distribution network and a gigabit optical distribution network, and the distribution mode comprises a single-fiber three-wave mode and a double-fiber three-wave mode;
the emergency terminal is a continuous electro-optical network terminal with a built-in loudspeaker, and comprises:
the optical signal receiving module is used for receiving an optical signal from a passive optical network and converting the optical signal into a digital signal;
the signal judgment module is used for judging whether the digital signal is the emergency broadcast signal;
the audio playing module is used for converting the digital signal into an audio signal and playing the audio signal through a loudspeaker when the digital signal is the emergency broadcast signal;
the optical signal receiving module is specifically configured to:
receiving a first wavelength optical signal from a passive optical network through a cable television CATV interface; receiving a second wavelength optical signal from the passive optical network through a Passive Optical Network (PON) interface;
or, receiving the composite optical signal from the passive optical network through the CATV interface; splitting the combined optical signal through an optical splitter to obtain the first wavelength optical signal and the second wavelength optical signal;
the optical signal receiving module is specifically configured to:
converting the optical signal with the first wavelength into a radio frequency signal through an optical-to-radio frequency circuit; demodulating the radio frequency signal into an intermediate frequency signal through a tuner; converting the intermediate frequency signal into a code stream TS data packet through a set top box processor STB CPU;
correspondingly, the signal judgment module is specifically configured to:
judging whether the packet identifier of the TS data packet is the packet identifier of the emergency broadcast signal or not by the STB CPU;
correspondingly, the audio playing module is specifically configured to:
decoding the TS data packet into an audio signal through an STB CPU;
wherein, the optical signal receiving module is further specifically configured to:
converting the second wavelength optical signal into a network protocol IP data packet through a passive optical network processor PON CPU;
correspondingly, the signal judgment module is further specifically configured to:
judging whether the identification information of the IP data packet is identification information of an emergency broadcast signal or not through the PON CPU;
correspondingly, the audio playing module is further specifically configured to:
sending the IP data packet to the STB CPU; and converting the IP data packet into an audio signal through the STB CPU.
6. A terminal, characterized in that the terminal comprises:
one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the emergency broadcast method of any of claims 1-4.
7. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the emergency broadcast method according to any one of claims 1 to 4.
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| CN201810142774.6A CN108259103B (en) | 2018-02-11 | 2018-02-11 | Emergency broadcasting method, system, terminal and computer readable medium |
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| CN201810142774.6A CN108259103B (en) | 2018-02-11 | 2018-02-11 | Emergency broadcasting method, system, terminal and computer readable medium |
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| KR101064890B1 (en) * | 2011-01-20 | 2011-09-16 | 폰 시스템주식회사 | Emergency public address and communication convergence system with unified optical system |
| CN103138861A (en) * | 2013-03-12 | 2013-06-05 | 苏州东奇信息科技有限公司 | Emergency broadcasting system based on digital broadcasting |
| CN104660357B (en) * | 2015-03-11 | 2018-05-04 | 四川九州电子科技股份有限公司 | Multichannel emergent broadcast intelligent terminal system and control method based on priority |
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