CN110166155B - Emergency broadcast multi-channel streaming media broadcasting method and system - Google Patents
Emergency broadcast multi-channel streaming media broadcasting method and system Download PDFInfo
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- CN110166155B CN110166155B CN201910399513.7A CN201910399513A CN110166155B CN 110166155 B CN110166155 B CN 110166155B CN 201910399513 A CN201910399513 A CN 201910399513A CN 110166155 B CN110166155 B CN 110166155B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/10—Arrangements for replacing or switching information during the broadcast or the distribution
- H04H20/103—Transmitter-side switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
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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
Abstract
The multichannel streaming media broadcasting method and system provided by the invention comprise audio acquisition, audio file or audio live stream input acquisition, transcoding and packaging of input audio according to requirements, real-time streaming of audio data to distribution service, real-time distribution of audio streams to corresponding channels according to requirements, transmission through a transmission overlay network, and terminal playing response, wherein the transmission channels mainly comprise TS channels and IP channels. The multi-channel streaming media broadcasting system and the method provided by the invention enable the emergency broadcasting system to uniformly and systematically control and manage the audio stream distribution of multiple transmission coverage channels such as a DVB-C cable digital television network, a DTMB ground digital television network, an IP network, an FM-RDS broadcasting network and the like, so that the multi-channel streaming media transmission and distribution of the emergency broadcasting are more timely, accurate, efficient and controllable.
Description
Technical Field
The invention relates to the technical field of emergency broadcasting, in particular to an emergency broadcasting multichannel streaming media broadcasting technology.
Background
The emergency broadcast platform is used as a rapid and fast information providing platform and an information transmission channel, when sudden public events such as natural disasters, accident disasters, public health, social safety and the like occur, the emergency broadcast platform system can timely, accurately and objectively provide authoritative early warning information for the society, prevent and reduce the occurrence of the sudden events and the damage caused by the sudden events to the maximum extent, guarantee the life and property safety of people and maintain the social stability.
The emergency broadcasting system needs to cover multiple transmission covering channels such as a DVB-C cable digital television network, a DTMB ground digital television network, an IP network, an FM-RDS broadcast network and the like, and the construction of the emergency broadcasting system at the present stage only mechanically overlaps the channels, so that the unified control and management of the multi-channel emergency broadcasting audio stream and the system cannot be realized, and the requirements of timely, accurate, efficient and controllable transmission and distribution of the multi-channel streaming media cannot be met.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the multi-channel streaming media of an emergency broadcasting system cannot be uniformly controlled and managed, and cannot meet the requirements of timeliness, accuracy, high efficiency and controllability.
The technical scheme adopted by the invention is as follows:
the invention discloses an emergency broadcast multichannel streaming media broadcasting method, which comprises the following steps:
receiving original audio data (including audio streams and audio files) output by a collection end;
transcoding, converting and packaging the original audio data by streaming media transcoding service to form audio data in a specified format;
converting the audio data into streaming media data of a specified type through a streaming media plug-flow service; the specified type of the streaming media data comprises an IP audio stream and a TSOverIP audio stream;
when the audio data is converted to a TSOverIP audio stream: judging whether idle lines exist in a PORT-PID mapping table corresponding to a TS channel to be transmitted, distributing the TSOVIP audio stream to an IP multiplexing PORT corresponding to the idle lines in the IP multiplexer configured according to the PORT-PID mapping table through a streaming media distribution service when the idle lines exist, and outputting the multiplexed TSOVIP audio stream to a corresponding first terminal after multiplexing; the PORT-PID mapping table comprises an IP input PORT of the IP multiplexer and the corresponding relation among Audio PID, PCR PID and PMT PID of the Audio program output after multiplexing; the first terminal plays an Audio program according to a received playing instruction containing Audio PID information;
when the audio data is converted to an IP audio stream: acquiring IP transmission information which corresponds to the IP audio stream and contains an unique identifier OpenID and a related specified protocol, pushing the IP audio stream of a first specified protocol to a streaming media distribution service receiving address URL1 specified by OpenID through a streaming media stream pushing service, receiving the IP audio stream from the URL1 through the streaming media distribution service, regenerating the IP audio stream of a second specified protocol, and distributing the IP audio stream to an IP audio stream distribution address URL2 in an IP channel specified by OpenID in real time; the audio program is output to a corresponding second terminal after transmission, and the second terminal plays the audio program through the obtained playing instruction or switching instruction containing the URL 2; the OpenID is used to distinguish between different IP audio streams and to specify the URL1 and URL 2;
the appointed format, the appointed type, the PORT-PID mapping table and the IP transmission information are all obtained from the emergency broadcast management server through the streaming media control service.
As a preferred scheme, the TS channel includes at least one of a DVB-C cable digital television transmission system and a DTMB terrestrial digital television transmission system, and correspondingly, the first terminal includes a DVB-C terminal or a DTMB terminal; the IP channel comprises at least one of an IP transmission system and an FM-RDS broadcast transmission system; the second terminal comprises an IP terminal or an FM-RDS terminal.
As a preferred scheme, when the audio data is converted into a tsoverlap audio stream and it is determined that a TS channel to be distributed is a DVB-C cable digital television transmission system or a DTMB terrestrial digital television transmission system, the method specifically includes:
s11 judging corresponding DVB-C cable digital television transmission system or DTMB ground digital television transmission system
Whether the PORT-PID mapping table is successfully acquired or not and whether the IP multiplexer corresponding to the DVB-C cable digital television network or the DTMB terrestrial digital television network is correctly configured or not, if so, executing the step S13, otherwise, executing the step S12;
s12, acquiring the mapping table from the emergency broadcast management server, and configuring an IP multiplexer according to the mapping table;
s13, judging whether there is free circuit in the PORT-PID mapping table, if yes, executing step S14, otherwise, ending;
s14, acquiring an idle line in the PORT-PID mapping table;
s15, pushing the TSOVIP audio stream to an IP multiplexer port corresponding to any idle line;
and S16, outputting the TSOVIP audio stream to a corresponding DVB-C network adaptation system or DTMB network adaptation system by the IP multiplexer after multiplexing, and transmitting the TSOVIP audio stream to the DVB-C terminal or the DTMB terminal through the HFC or DTMB transmitting station.
As a preferred embodiment of the method, it is,
when the audio data is converted into an IP audio stream and the IP channel to be distributed is judged to be an IP transmission system: distributing the IP audio stream of the second specified protocol to an IP audio stream distribution address URL2 in an IP channel specified by OpenID in real time through a streaming media distribution service; the audio program is output to the IP terminal after transmission, and the IP terminal plays the audio program through the obtained playing instruction containing the URL 2;
when the audio data is converted into an IP audio stream and the IP channel to be distributed is judged to be an FM-RDS broadcast transmission system: distributing the IP audio stream of the second specified protocol to an IP audio stream distribution address URL2 in an IP channel specified by OpenID in real time through a streaming media distribution service; the audio broadcasting system is transmitted and then output to an FM-RDS network adaptation system, the FM-RDS network adaptation system obtains a switching instruction containing URL2 from an emergency broadcasting management server, corresponding IP audio streams are selected according to URL2 switching, the IP audio streams are converted into FM signals and then output to an FM-RDS terminal through a frequency modulation transmitting station, and the FM-RDS terminal plays audio programs through a playing instruction obtained from the emergency broadcasting management server.
Preferably, the first and second specified protocols do not require agreement; the first specified protocol includes, but is not limited to, RTSP, RTMP; the second designated protocol includes, but is not limited to, HTTP, RTSP, RTMP.
As a preferred scheme, the format of the URL1 is: a first specified protocol// [ IP: PORT ]/[ APP ]/[ OpenID ]; the format of the URL2 is: a second specified protocol// [ IP: PORT ]/[ APP ]/[ OpenID ]; the [ IP: PORT ] of the URL1 is an IP address and a PORT for receiving an IP audio stream by the streaming media distribution service, the [ IP: PORT ] of the URL2 is an IP address and a PORT for distributing the IP audio stream generated by the streaming media distribution service, the [ APP ] is an application name, and the [ OpenID ] is an audio stream ID; in the multi-path flow of the same IP channel, the IP address is consistent with the port and the application name, and in the multi-path flow of different IP channels, the IP address is not required to be consistent with the port and the application name.
The invention also discloses an emergency broadcast multi-channel streaming media broadcasting system, which comprises an acquisition terminal, an emergency broadcast management server, an emergency broadcast multi-channel streaming media server, a transmission overlay network and a terminal,
the collection end is configured to: collecting audio data and transmitting the collected original audio data to an emergency broadcast multichannel streaming media server;
the streaming media control service is configured to: the emergency broadcast management server is connected and communicated with the emergency broadcast management server, and manages and controls streaming media transcoding service, streaming media plug-flow service and streaming media distribution service;
the transport overlay network is configured to: transmitting emergency broadcast instructions and streaming media data, wherein the emergency broadcast instructions and the streaming media data comprise a TS channel and an IP channel;
the emergency broadcast multichannel streaming server is configured to: the method comprises the steps of streaming media control service, streaming media transcoding service, streaming media pushing service and streaming media distribution service; wherein the content of the first and second substances,
the streaming media transcoding service is used for transcoding, transcoding and packaging the original audio data to form audio data in a specified format;
the streaming media push streaming service is used for converting the audio data into streaming media data of a specified type, wherein the specified type of the streaming media data comprises an IP audio stream and a TSOverIP audio stream;
the streaming media distribution service is used for judging whether an idle line exists in a PORT-PID mapping table corresponding to a TS channel to be transmitted or not when the audio data is converted into TSOVIP audio streams, and distributing the TSOVIP audio streams to IP multiplexing PORTs corresponding to the idle lines in the IP multiplexer which are configured according to the PORT-PID mapping table through the streaming media distribution service when the idle lines exist; when the streaming media distribution service is used for converting the audio data into an IP audio stream, acquiring IP transmission information which corresponds to the IP audio stream and contains a unique identifier OpenID and a related specified protocol, pushing the IP audio stream of the first specified protocol to a streaming media distribution service receiving address URL1 specified by the OpenID through a streaming media streaming service, then receiving the IP audio stream from the URL1 through the streaming media distribution service, regenerating the IP audio stream of the second specified protocol, and distributing the IP audio stream to an IP audio stream distribution address URL2 in an IP channel specified by the OpenID in real time; the OpenID is used to distinguish between different IP audio streams and to specify the URL1 and URL 2;
the terminal is used for receiving and playing the streaming media data transmitted by the transmission overlay network.
As a preferred scheme, the TS channel includes at least one of a DVB-C cable digital television transmission system and a DTMB terrestrial digital television transmission system, and correspondingly, the terminal includes a DVB-C terminal or a DTMB terminal; the IP channel comprises at least one of an IP transmission system and an FM-RDS broadcast transmission system; the terminal comprises an IP terminal or an FM-RDS terminal.
As a preferred scheme, the streaming media distribution service is configured to, when the audio data is converted into a tsoverlap audio stream and it is determined that a TS channel to be distributed is a DVB-C cable digital television transmission system or a DTMB terrestrial digital television transmission system, specifically include:
s11, judging whether the PORT-PID mapping table corresponding to the DVB-C cable digital television transmission system or the DTMB terrestrial digital television transmission system is successfully acquired, whether the IP multiplexer corresponding to the DVB-C cable digital television network or the DTMB terrestrial digital television network is correctly configured, if so, executing the step S13, otherwise, executing the step S12;
s12, acquiring the mapping table from the emergency broadcast management server, and configuring an IP multiplexer according to the mapping table;
s13, judging whether there is free circuit in the PORT-PID mapping table, if yes, executing step S14, otherwise, ending;
s14, acquiring an idle line in the PORT-PID mapping table;
s15, pushing the TSOVIP audio stream to an IP multiplexer port corresponding to any idle line;
and S16, outputting the TSOVIP audio stream to a corresponding DVB-C network adaptation system or DTMB network adaptation system by the IP multiplexer after multiplexing, and transmitting the TSOVIP audio stream to the DVB-C terminal or the DTMB terminal through the HFC or DTMB transmitting station.
As a preferred scheme, the streaming media distribution service is configured to, when the audio data is converted into an IP audio stream and it is determined that an IP channel to be distributed is an IP transmission system: distributing the IP audio stream of the second specified protocol to an IP audio stream distribution address URL2 in an IP channel specified by OpenID in real time through a streaming media distribution service; the audio program is output to the IP terminal after transmission, and the IP terminal plays the audio program through the obtained playing instruction containing the URL 2;
when the audio data is converted into an IP audio stream and the IP channel to be distributed is judged to be an FM-RDS broadcast transmission system: distributing the IP audio stream of the second specified protocol to an IP audio stream distribution address URL2 in an IP channel specified by OpenID in real time through a streaming media distribution service; the audio broadcasting system is transmitted and then output to an FM-RDS network adaptation system, the FM-RDS network adaptation system obtains a switching instruction containing URL2 from an emergency broadcasting management server, corresponding IP audio streams are selected according to URL2 switching, the IP audio streams are converted into FM signals and then output to an FM-RDS terminal through a frequency modulation transmitting station, and the FM-RDS terminal plays audio programs through a playing instruction obtained from the emergency broadcasting management server.
Has the advantages that:
compared with the prior art, the multichannel streaming media broadcasting method and the multichannel streaming media broadcasting system provided by the invention comprise the steps of audio acquisition, audio file or audio live stream input acquisition, transcoding and packaging of input audio according to requirements, real-time streaming of audio data to distribution service, real-time distribution of the audio stream to a corresponding channel according to requirements, transmission through a transmission overlay network and terminal playing response. The emergency broadcast multichannel streaming media broadcast mainly comprises a TS channel and an IP channel, and the transmission overlay network mainly comprises a DVB-C cable digital television network transmission system, a DTMB ground digital television network transmission system, an IP network transmission system and an FM-RDS broadcast network transmission system. Wherein: for a DVB-C cable digital television network transmission system, an emergency broadcast management server only needs to manage a TSOVIP stream which is sent to a specific port of an IP multiplexer corresponding to a DVB-C cable digital television network by an emergency broadcast multichannel streaming media server, and then the unified management of the multichannel audio streams of the TS channel of the DVB-C cable digital television network can be realized; for the DTMB ground digital television network transmission system, the emergency broadcast management server only needs to manage the TSOVIP stream which is sent to a specific port of an IP multiplexer corresponding to the DTMB ground digital television network by the emergency broadcast multi-channel stream media server, and then the unified management of the multi-channel audio stream of the TS channel of the DTMB ground digital television network can be realized; for an IP network transmission system, the emergency broadcast management server only needs to manage OpenID corresponding to the IP network, and unified management of multiple audio streams of IP channels corresponding to the IP network can be realized; for an FM-RDS broadcast network transmission system, the emergency broadcast management server only needs to manage the OpenID corresponding to the FM-RDS broadcast network, and then the unified management of the multi-channel audio stream of the IP channel corresponding to the FM-RDS broadcast network can be realized.
The multi-channel streaming media broadcasting system and the method provided by the invention enable the emergency broadcasting system to uniformly and systematically control and manage the audio stream distribution of multiple transmission coverage channels such as a DVB-C cable digital television network, a DTMB ground digital television network, an IP network, an FM-RDS broadcasting network and the like, so that the multi-channel streaming media transmission and distribution of the emergency broadcasting are more timely, accurate, efficient and controllable.
Drawings
Fig. 1 is a block diagram of an emergency broadcast multi-channel streaming media broadcasting system;
FIG. 2 is a flow chart of an emergency broadcast multi-channel streaming media server operation;
FIG. 3 is a flow diagram of emergency broadcast multi-channel streaming media distribution;
FIG. 4 is a flow chart of a TS channel for distributing TSOVIP audio streams to a DVB-C cable digital television network;
FIG. 5 is a schematic diagram of a DVB-C cable digital television network for multiplexed data transmission;
FIG. 6 is a flow chart of a TS channel for distributing TSOVIP audio streams to a DTMB terrestrial digital television network;
FIG. 7 is a diagram of a DTMB terrestrial digital television network for multi-channel data transmission;
FIG. 8 is a flow chart of distributing IP audio streams to corresponding IP channels of an IP network;
FIG. 9 is a schematic diagram of IP network multiplexing data transmission;
FIG. 10 is a flow diagram of the distribution of an IP audio stream to a corresponding IP channel of an FM-RDS broadcast network;
FIG. 11 is a diagram of a multiplex data transmission of FM-RDS broadcasting network.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides an emergency broadcast multichannel streaming media broadcasting system, which mainly includes an acquisition end, an emergency broadcast multichannel streaming media server, an emergency broadcast management server, a transmission overlay network, and a terminal.
The acquisition end is mainly responsible for acquiring audio and transmitting acquired audio files or audio streams (such as live streams and shout streams) to the emergency broadcast multi-channel streaming media server. The acquisition end mainly comprises an emergency broadcast management server, an emergency broadcast control console, an emergency broadcast APP and the like, and corresponds to the release channels of an emergency broadcast management platform end, an emergency broadcast inter-cut platform end, an emergency broadcast mobile end and the like. Wherein: the emergency broadcast management server is mainly used for acquiring audio files by an emergency broadcast management platform end; the emergency broadcast control console is mainly used for acquiring audio streams at an emergency broadcast insertion platform end; the emergency broadcast APP is mainly used for acquiring audio files and audio streams at an emergency broadcast mobile terminal.
The emergency broadcast multi-channel streaming media server mainly realizes transcoding, streaming pushing, distributing and other services of an original audio file or an audio stream sent by a collection end. The emergency broadcast multichannel streaming media server mainly comprises streaming media control service, streaming media transcoding service, streaming media plug-flow service and streaming media distribution service, wherein: the stream media control service is connected and communicated with the emergency broadcast management server and realizes the management and control of stream media transcoding service, stream media pushing service and stream media distribution service; the streaming media transcoding service transcodes and encapsulates the original audio file or audio stream from the acquisition end into an audio file or audio stream with a specified format according to the requirement and then outputs the audio file or audio stream to the streaming media plug-flow service; the streaming media push streaming service converts the transcoded and encapsulated audio file or audio stream into specified streaming media (IP/TSOverIP) data and pushes the data to a streaming media distribution service; the streaming media distribution service distributes the streaming media data to the corresponding transport overlay network.
The emergency broadcast management server can interact with direct information of a user, is mainly used for generating corresponding instruction data, control signals and related streaming media distribution information, and sends the corresponding instruction data, control signals and related streaming media distribution information to the emergency broadcast multichannel streaming media server. The emergency broadcast management server can also be used as an audio data acquisition end to input the acquired audio data into the emergency broadcast multi-channel streaming media server.
The transmission overlay network is mainly used for transmitting emergency broadcast instructions and streaming media data and mainly comprises a DVB-C cable digital television network transmission system, a DTMB terrestrial digital television network transmission system, an IP network transmission system and an FM-RDS broadcast network transmission system. The DVB-C cable digital television network transmission system mainly comprises an IP multiplexer, a DVB-C network adaptation system and an HFC (hybrid fiber coaxial cable network) which are connected in sequence, wherein stream media data of an emergency broadcast multichannel stream media server received by the DVB-C cable digital television network transmission system are mainly TSOverIP audio streams (TSOverIP streams or TS streams for short); the DTMB ground digital television network transmission system mainly comprises an IP multiplexer, a DTMB network adaptation system and a DTMB transmitting station which are connected in sequence, and stream media data of a received emergency broadcast multi-channel stream media server is mainly TSOVERIP audio stream; the IP network transmission system includes but is not limited to ethernet, 2G, 3G, 4G, 5G, etc., and the streaming media data of the emergency broadcast multichannel streaming media server received by the IP network transmission system is mainly IP audio stream (IP stream for short); the FM-RDS broadcast network transmission system mainly comprises an FM-RDS network adaptation system and a frequency modulation transmitting station which are sequentially connected, and the streaming media data of the emergency broadcast multichannel streaming media server received by the FM-RDS broadcast network transmission system is mainly IP audio stream.
The terminal mainly comprises a DVB-C terminal, a DTMB terminal, an IP terminal and an FM-RDS terminal and is used for receiving and playing streaming media data transmitted by the multi-channel transmission overlay network. One or more of these terminals may be embodied at the same time in a user terminal, such as a multimode column, multimode receiver/expander, set-top box, outdoor large screen.
As shown in fig. 2, the emergency broadcast multichannel streaming media server workflow includes the following steps:
a1, the emergency broadcast multi-channel streaming media server obtains the audio file or audio stream input sent by the acquisition end. The original audio input of the acquisition end can be an audio file or an audio stream, and the audio format of the audio file or the audio stream can be any audio format, including but not limited to MP3, AAC, MPEG-2, WAV, DRA +, and the like.
A2, the emergency broadcast multi-channel streaming media server transcodes, transforms and encapsulates the original audio data output by the acquisition end to form the audio data with the specified format. Specifically, a format to be converted of original audio data to be transcoded is acquired from the emergency broadcast management server through the streaming media control service, and then the original audio data is transcoded, converted and packaged through the streaming media transcoding service to form an audio file or an audio stream in a specified format. The specified format may be obtained from the emergency broadcast management server by the streaming control service.
A3, the emergency broadcast multi-channel streaming media server converts the transcoded and encapsulated audio data into streaming media data (including IP stream or TSOVIP stream), and pushes the streaming media data to a streaming media distribution service in real time. Specifically, the type and the related information of the audio data after being converted and encapsulated are acquired from the emergency broadcast management server through the streaming media control service, and then the audio data is converted into an IP stream or a tsoverlap stream through the streaming media push streaming service.
A4, the emergency broadcast multi-channel streaming media server distributes the streaming media data to the corresponding transmission overlay network in real time. Specifically, a streaming media control service acquires a transmission channel and related information, to be distributed, of streaming media data from an emergency broadcast management server, and then distributes the streaming media data to the corresponding transmission channel through a streaming media distribution service. The transmission channels of the transmission overlay network related to the emergency broadcast streaming media are mainly divided into a TS channel and an IP channel, wherein the TS channel mainly comprises a DVB-C cable digital television network, a DTMB terrestrial digital television network and the like, and the IP channel mainly comprises an IP network, an FM-RDS broadcast network and the like.
As shown in fig. 3, in step a4, the process of the emergency broadcast multichannel streaming server distributing streaming media data to a corresponding transmission overlay network in real time through a streaming media distribution service specifically includes the following steps:
b1, acquiring a transmission overlay network and related information corresponding to the streaming media data to be distributed;
b2, judging whether the DVB-C cable digital television network needs to be distributed, if so, distributing TSOVIP stream to a TS channel corresponding to the DVB-C cable digital television network;
b3, judging whether the DTMB ground digital television network needs to be distributed, if so, distributing TSOVIP flow to a TS channel corresponding to the DTMB ground digital television network;
b4, judging whether the IP network needs to be distributed, if so, distributing the IP stream to the IP channel corresponding to the IP network;
b5, judging whether the FM-RDS broadcast network needs to be distributed, if so, distributing the IP stream to the IP channel corresponding to the FM-RDS broadcast network.
The transmission overlay network and related information (e.g., PORT-PID mapping table, IP transmission information, etc.) corresponding to the streaming media data to be distributed, which are acquired from the emergency broadcast management server, may be selected and set by the user through the emergency broadcast management server or automatically generated by the emergency broadcast management server according to an emergency plan.
It should be noted that, the steps B2 to B5 do not have a strict time sequence, and may be considered as a parallel relationship, and the streaming media control service may know which transmission overlay network will be subsequently transmitted through according to the audio data conversion type obtained from the emergency broadcast management server.
As shown in fig. 4, in step B2, the flow of distributing the tsoverlap audio stream to the TS channel corresponding to the DVB-C cable digital television network specifically includes the following steps:
c1, judging whether the DVB-C PORT-PID mapping table corresponding to the DVB-C cable digital television network is successfully acquired or not, whether the IP multiplexer corresponding to the DVB-C cable digital television network is correctly configured or not, if so, executing the step C3, otherwise, executing the step C2;
c2, obtaining DVB-C PORT-PID mapping table from the emergency broadcast management server, and configuring DVB-CIP multiplexer according to the mapping table;
c3, judging whether there is idle line in DVB-C PORT-PID mapping table (specifically, a column of ' state ' column can be added in the mapping table to mark whether each line is in idle or busy state), if yes, executing step C4, otherwise, ending, because there is no idle line, it can't distribute TSOVERIP audio stream;
c4, obtaining the first idle line of DVB-C PORT-PID mapping table;
c5, distributing the TSOVIP audio stream to the DVB-C IP multiplexer port corresponding to the first idle line;
and C6, the DVB-C IP multiplexer outputs the TS stream to the corresponding DVB-C front-end network adaptation system.
As shown in fig. 5, a DVB-C PORT-PID mapping table corresponding to the DVB-C cable digital television network is created in advance by a network manager at an emergency broadcast management platform, and is stored in an emergency broadcast management server. The table defines the corresponding relation between the IP input port of the IP multiplexer corresponding to the DVB-C cable digital television network and the Audio PID, PCRPID and PMT PID of the Audio program output after the program multiplexing, and is used for guiding the configuration of the IP multiplexer and managing the TSOVIP Audio stream of the DVB-C cable digital television network. The IP multiplexer configuration needs to configure the PORTs of the IP input of the multi-channel programs and the remapping of the Audio PID, the PCR PID and the PMT PID after the programs are multiplexed in batch according to the PORT-PID mapping table. It should be noted that, when the type of the audio data to be converted after being converted and encapsulated is known to be a tsoverlap audio stream through the streaming media control service, and the transmitted channel is a DVB-C cable digital television network, the corresponding DVB-C PORT-PID mapping table can be simultaneously acquired, and after the channel is acquired for the first time and is subsequently determined to be the type, the channel does not need to be acquired repeatedly unless the mapping table is updated. The same applies to the later DTMB terrestrial digital television network, and the description is omitted.
An IP multiplexer corresponding to a DVB-C cable digital television network receives a plurality of TSOVIP audio streams distributed by an emergency broadcast multichannel streaming media server, carries out PID remapping, then multiplexes and outputs one TS stream to enter a corresponding DVB-C front end network adaptation system, and finally transmits the TS stream to a DVB-C terminal through HFC (hybrid fiber coaxial cable). The DVB-C terminal can play the corresponding Audio program according to the specific information such as the Audio PID and the like in the playing instruction sent by the emergency broadcast management server.
The steps realize the correspondence of the input TSOVIP port of the IP multiplexer corresponding to the DVB-C cable digital television network and the output Audio PID, PCR PID and PMT PID in the multiplexed TS stream, so that the emergency broadcast management server only needs to manage the TSOVIP stream which is sent to the specific port of the IP multiplexer corresponding to the DVB-C cable digital television network by the emergency broadcast multi-channel streaming media server, and the unified management of the multi-channel Audio stream of the TS channel of the DVB-C cable digital television network can be realized.
As shown in fig. 6, in step B3, the flow of distributing the tsoverlap audio stream to the TS channel corresponding to the DTMB terrestrial digital television network specifically includes the following steps:
d1, judging whether the DTMB PORT-PID mapping table corresponding to the DTMB terrestrial digital television network is successfully created or not, whether the IP multiplexer corresponding to the DTMB terrestrial digital television network is correctly configured or not, if the configuration is correct, executing the step D3, and if the configuration is not correct, executing the step D2;
d2, creating a DTMB PORT-PID mapping table, and configuring a DTMB IP multiplexer;
d3, judging whether the DTMB PORT-PID mapping table has an idle line, if so, executing the step D4, otherwise, ending, namely, no idle line exists, and the TSOVIP audio stream distribution cannot be carried out;
d4, acquiring a first idle line of a DTMB PORT-PID mapping table;
d5, distributing the TSOverIP audio stream to the port of the DTMB IP multiplexer corresponding to the first idle line;
d6, the DTMB IP multiplexer outputs the TS stream to the corresponding DTMB network adaptation system.
As shown in fig. 7, the DTMB PORT-PID mapping table corresponding to the DTMB terrestrial digital television network is created by a network manager at the emergency broadcast management platform and stored in the emergency broadcast management server. The table defines the corresponding relation between the IP input port of the IP multiplexer corresponding to the DTMB terrestrial digital television network and the Audio PID, the PCR PID and the PMT PID of the Audio program output after the program multiplexing, and is used for guiding the configuration of the IP multiplexer and managing the TSOVERIP Audio stream of the DTMB terrestrial digital television network. The IP multiplexer configuration needs to configure the PORTs of the IP input of the multi-channel programs and the remapping of the Audio PID, the PCR PID and the PMT PID of the program multiplexing in batch according to the PORT-PID mapping table.
And an IP multiplexer corresponding to the DTMB terrestrial digital television network receives a plurality of TSOVIP audio streams distributed by an emergency broadcast multichannel stream media server, performs PID remapping, multiplexes and outputs a TS stream to enter a corresponding DTMB front-end network adaptation system, and finally transmits the TS stream to a DTMB terminal through a DTMB transmitting station. And the DTMB terminal plays the corresponding Audio program according to the information such as the specific Audio PID and the like in the playing instruction sent by the emergency broadcast management server.
The steps realize the correspondence of the TSOVIP port input by the IP multiplexer corresponding to the DTMB ground digital television network and the Audio PID, the PCR PID and the PMT PID in the TS stream after output multiplexing, so that the emergency broadcast management server only needs to manage the TSOVIP stream which is sent to the specific port of the IP multiplexer corresponding to the DTMB ground digital television network by the emergency broadcast multi-channel stream media server, and the unified management of the multi-channel Audio stream of the TS channel of the DTMB ground digital television network can be realized.
As shown in fig. 8, in step B4, the flow of distributing the IP audio stream to the IP channel corresponding to the IP network mainly includes the following steps:
e1, obtaining IP audio stream from the emergency broadcast management server through the streaming media control service, wherein the IP audio stream contains IP transmission information of parameters such as a unique identification OpenID, a streaming media push streaming service push specification protocol, a streaming media distribution service specification protocol and the like in the IP network.
E2, pushing the IP audio stream of the specified protocol to the streaming media distribution service receiving address URL1 specified by OpenID through the streaming media push streaming service.
E3, receiving the IP audio stream from the URL1 through the streaming media distribution service, regenerating a distribution IP audio stream of a specified protocol, distributing it to the IP audio stream distribution address URL2 in real time, and returning the address URL2 of the distribution IP audio stream to the emergency broadcast management server, although the address URL2 may not be returned because the address URL2 is specified by OpenID and corresponds to the URL1, and is unique in the IP channel.
The OpenID is a unique identifier of an IP audio stream of an IP channel corresponding to the IP network generated by the emergency broadcast management server and is stored in the emergency broadcast management server. OpenID is used to distinguish different IP audio streams, and is also used to specify a streaming media delivery service reception channel address and a delivery IP audio stream address generated by the streaming media delivery service. That is, in the IP channel, no matter how many network types are included, the address of the transmission route in each IP channel (including URL1 and URL2 corresponding thereto) is specified (corresponding) by the OpenID, that is, each OpenID in the IP channel is unique, and the address of each transmission route is also unique. As shown in FIG. 9, URL2 includes 5 URLs 21-25. similarly, URL1 includes 5 URLs 11-15 (not shown).
The streaming media distribution service receives the IP stream pushed by the streaming media push streaming service and generates a distribution IP audio stream output, wherein the IP stream pushed by the streaming media push streaming service supports protocols including but not limited to RTSP, RTMP and the like, the distribution IP audio stream generated by the streaming media distribution service supports protocols including but not limited to HTTP, RTSP, RTMP and the like, and the front protocol and the rear protocol may be consistent or inconsistent. Specifically, what protocol is used is configured by a network manager at the emergency broadcast management platform end, stored in the emergency broadcast management server, and controlled through the emergency broadcast management server and the streaming media control service.
For example, OpenID-specified streaming media distribution service reception channel address URL1 may be in the following format:
rtmp://[IP:PORT]/[APP]/[OpenID]
wherein: rtmp, a specified protocol is pushed for the streaming media push streaming service, [ IP: PORT ] is an IP address and a PORT of a receiving channel of the streaming media distribution service, [ APP ] is an application name, and [ OpenID ] is an audio stream ID. Here, the IP address and port of the IP channel and the application name are all fixed, i.e. the IP address and port and application name corresponding to different audio stream IDs are unique. And the communication protocol may be specified at the emergency broadcast management server.
Correspondingly, the IP audio stream distribution address URL2 generated by the OpenID-specified streaming media distribution service may be in the following format:
http://[IP:PORT]/[APP]/[OpenID]
wherein: http, appointing a protocol for the streaming media distribution service, [ IP: PORT ] is an IP address and a PORT for distributing IP audio streams generated by the streaming media distribution service, [ APP ] is an application name, and [ OpenID ] is an audio stream ID. It should be noted that the IP address, the port, and the application name in the same IP channel are all fixed, that is, the IP address, the port, and the application name corresponding to different audio stream IDs are all unique. The communication protocol can be specified in the emergency broadcast management server, and the IP addresses, ports and application names can be set to be the same or different according to the requirements among different IP channels, so that the distribution, transmission and playing of the streaming media are not influenced.
As shown in fig. 9, for an IP channel corresponding to an IP network, the emergency broadcast multi-channel streaming media server may support multiple inputs, distribute multiple IP audio streams for output, and finally transmit the streams to an IP terminal through an IP network transmission system. And the IP terminal plays the corresponding audio program according to the information such as the specific URL in the playing instruction sent by the emergency broadcast management server.
The corresponding of the OpenID corresponding to the IP network and the URL of the IP audio stream distribution address is realized through the steps, so that the emergency broadcast management server only needs to manage the OpenID corresponding to the IP network, and the unified management of the multiple audio streams of the IP channel corresponding to the IP network can be realized.
As shown in step B5 in fig. 10, the IP channel flow for distributing the IP audio stream to the FM-RDS broadcasting network includes the following steps:
f1, obtaining IP audio stream from the emergency broadcast management server through the streaming media control service, wherein the IP audio stream contains IP transmission information of parameters such as a unique identification OpenID, a streaming media push streaming service push specified protocol, a streaming media distribution service specified protocol and the like in the FM-RDS broadcast network.
F2, pushing the IP audio stream of the specified protocol to the streaming media distribution service receiving address URL1 specified by OpenID through the streaming media push streaming service.
F3, receiving the IP audio stream from the URL1 by the streaming media distribution service, generating a distribution IP audio stream of a specified protocol, and returning the address URL2 of the distribution IP audio stream to the emergency broadcast management server.
The features of OpenID, supported protocol, URL1 and URL2 are basically the same as those of the IP network transmission system, and are not described herein again.
As shown in FIG. 11, for the corresponding IP channel of the FM-RDS broadcast network, the emergency broadcast multi-channel streaming media server can support multiple inputs and distribute multiple IP audio streams to be output to the FM-RDS network adaptation system. The FM-RDS network adapter system receives a switching instruction of the emergency broadcast management server, switches and selects an IP audio stream according to the URL2, converts the IP audio stream into an FM signal and outputs the FM signal to the FM transmitting station, and finally transmits the FM signal to the FM-RDS terminal.
The corresponding of the OpenID corresponding to the FM-RDS broadcast network and the URL of the IP audio stream distribution address is realized through the steps, so that the emergency broadcast management server only needs to manage the OpenID corresponding to the FM-RDS broadcast network, and the unified management of the multi-channel audio stream of the IP channel corresponding to the FM-RDS broadcast network can be realized.
Correspondingly, the embodiment also discloses an emergency broadcast multichannel streaming media broadcasting method, which can carry out uniform and systematic control and management on the audio stream distribution of the multiple transmission coverage channels through an emergency multichannel streaming media broadcasting system, so that the emergency broadcast multichannel streaming media transmission distribution is more timely, accurate, efficient and controllable. The corresponding implementation methods are included in the above description of the emergency broadcast multi-channel streaming media broadcasting system, and are not described herein again.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. An emergency broadcast multi-channel streaming media broadcasting method is characterized by comprising the following steps:
acquiring original audio data;
transcoding, converting and packaging the original audio data by streaming media transcoding service to form audio data in a specified format;
converting the audio data in the specified format into the streaming media data in the specified type through the streaming media plug-flow service; the specified type of the streaming media data comprises an IP audio stream and a TSOverIP audio stream;
when audio data in the specified format is converted to a tsoverlap audio stream: judging whether idle lines exist in a PORT-PID mapping table corresponding to a TS channel to be transmitted, distributing the TSOVIP audio stream to an IP multiplexing PORT corresponding to the idle lines in the IP multiplexer configured according to the PORT-PID mapping table through a streaming media distribution service when the idle lines exist, and outputting the multiplexed TSOVIP audio stream to a corresponding first terminal after multiplexing; the PORT-PID mapping table comprises an IP input PORT of the IP multiplexer and the corresponding relation among Audio PID, PCR PID and PMT PID of the Audio program output after multiplexing; the first terminal plays an Audio program according to a received playing instruction containing Audio PID information;
when audio data in the specified format is converted into an IP audio stream: acquiring IP transmission information which corresponds to the IP audio stream and contains an unique identifier OpenID and a related specified protocol, pushing the IP audio stream of the first specified protocol to a streaming media distribution service receiving address URL1 specified by OpenID through a streaming media stream pushing service, then receiving the IP audio stream of the first specified protocol from the URL1 through the streaming media distribution service, regenerating the IP audio stream of the second specified protocol, and distributing the IP audio stream of the second specified protocol to an IP audio stream distribution address URL2 in an IP channel specified by OpenID in real time; the audio program is output to a corresponding second terminal after transmission, and the second terminal plays the audio program through the obtained playing instruction or switching instruction containing the URL 2; the OpenID is used to distinguish between different IP audio streams and to specify the URL1 and URL 2;
the appointed format, the appointed type, the PORT-PID mapping table and the IP transmission information are all obtained from the emergency broadcast management server through the streaming media control service.
2. The emergency broadcast multi-channel streaming media broadcasting method of claim 1, wherein the TS channel comprises a DVB-C cable digital television transmission system or a DTMB terrestrial digital television transmission system, and correspondingly, the first terminal comprises a DVB-C terminal or a DTMB terminal; the IP channel comprises an IP transmission system or an FM-RDS broadcast transmission system, and the second terminal comprises an IP terminal or an FM-RDS terminal.
3. The method of claim 2, wherein when the audio data in the specified format is converted into a tsoverlap audio stream and the TS channel to be distributed is determined to be a DVB-C cable digital television transmission system or a DTMB terrestrial digital television transmission system, the method specifically comprises:
s11, judging whether the PORT-PID mapping table corresponding to the DVB-C cable digital television transmission system or the DTMB terrestrial digital television transmission system is successfully acquired, whether the IP multiplexer corresponding to the DVB-C cable digital television network or the DTMB terrestrial digital television network is correctly configured, if so, executing the step S13, otherwise, executing the step S12;
s12, acquiring the mapping table from the emergency broadcast management server, and configuring an IP multiplexer according to the mapping table;
s13, judging whether there is free circuit in the PORT-PID mapping table, if yes, executing step S14, otherwise, ending;
s14, acquiring an idle line in the PORT-PID mapping table;
s15, pushing the TSOVIP audio stream to an IP multiplexer port corresponding to any idle line;
and S16, outputting the TSOVIP audio stream to a corresponding DVB-C network adaptation system or DTMB network adaptation system by the IP multiplexer after multiplexing, and transmitting the TSOVIP audio stream to the DVB-C terminal or the DTMB terminal through the HFC or DTMB transmitting station.
4. The emergency broadcast multi-channel streaming broadcasting method of claim 2,
when the audio data in the specified format is converted into an IP audio stream and the IP channel to be distributed is judged to be an IP transmission system: distributing the IP audio stream of the second specified protocol to an IP audio stream distribution address URL2 in an IP channel specified by OpenID in real time through a streaming media distribution service; the audio program is output to the IP terminal after transmission, and the IP terminal plays the audio program through the obtained playing instruction containing the URL 2;
when the audio data is converted into an IP audio stream and the IP channel to be distributed is judged to be an FM-RDS broadcast transmission system: distributing the IP audio stream of the second specified protocol to an IP audio stream distribution address URL2 in an IP channel specified by OpenID in real time through a streaming media distribution service; the audio broadcasting system is transmitted and then output to an FM-RDS network adaptation system, the FM-RDS network adaptation system obtains a switching instruction containing URL2 from an emergency broadcasting management server, corresponding IP audio streams are selected according to URL2 switching, the IP audio streams are converted into FM signals and then output to an FM-RDS terminal through a frequency modulation transmitting station, and the FM-RDS terminal plays audio programs through a playing instruction obtained from the emergency broadcasting management server.
5. The emergency broadcast multichannel streaming media broadcasting method according to claim 2, wherein the first specified protocol and the second specified protocol do not require agreement; the first specified protocol includes, but is not limited to, RTSP, RTMP; the second designated protocol includes, but is not limited to, HTTP, RTSP, RTMP.
6. The emergency broadcast multichannel streaming media broadcasting method according to claim 2, wherein the URL1 is in the format of: a first specified protocol// [ IP: PORT ]/[ APP ]/[ OpenID ]; the format of the URL2 is: a second specified protocol// [ IP: PORT ]/[ APP ]/[ OpenID ]; the [ IP: PORT ] of the URL1 is an IP address and a PORT for receiving an IP audio stream by the streaming media distribution service, the [ IP: PORT ] of the URL2 is an IP address and a PORT for distributing the IP audio stream generated by the streaming media distribution service, the [ APP ] is an application name, and the [ OpenID ] is an audio stream ID; in the multi-path flow of the same IP channel, the IP address is consistent with the port and the application name, and in the multi-path flow of different IP channels, the IP address is not required to be consistent with the port and the application name.
7. An emergency broadcast multi-channel streaming media broadcasting system is characterized by comprising an acquisition terminal, an emergency broadcast management server, an emergency broadcast multi-channel streaming media server, a transmission overlay network and a terminal,
the collection end is configured to: collecting audio data and transmitting the collected original audio data to an emergency broadcast multichannel streaming media server;
the transport overlay network is configured to: transmitting emergency broadcast instructions and streaming media data, wherein the emergency broadcast instructions and the streaming media data comprise a TS channel and an IP channel;
the emergency broadcast multichannel streaming server is configured to: the method comprises the steps of streaming media control service, streaming media transcoding service, streaming media pushing service and streaming media distribution service; wherein the content of the first and second substances,
the streaming media control service is configured to: the emergency broadcast management server is connected and communicated with the emergency broadcast management server, and manages and controls streaming media transcoding service, streaming media plug-flow service and streaming media distribution service;
the streaming media transcoding service is used for transcoding, transcoding and packaging the original audio data to form audio data in a specified format;
the streaming media push streaming service is used for converting audio data in a specified format into streaming media data of a specified type, wherein the specified type of the streaming media data comprises an IP audio stream and a TSOVIP audio stream;
the stream media distribution service is used for judging whether an idle line exists in a PORT-PID mapping table corresponding to a TS channel to be transmitted or not when audio data in a specified format is converted into a TSOVIP audio stream, and distributing the TSOVIP audio stream to an IP multiplexing PORT corresponding to the idle line in the IP multiplexer configured according to the PORT-PID mapping table through the stream media distribution service when the idle line exists; when the streaming media distribution service is used for converting audio data in a specified format into an IP audio stream, acquiring IP transmission information which corresponds to the IP audio stream and contains a unique identifier OpenID and a related specified protocol, pushing the IP audio stream of a first specified protocol to a streaming media distribution service receiving address URL1 specified by the OpenID through a streaming media stream pushing service, then receiving the IP audio stream of the first specified protocol from the URL1 through the streaming media distribution service, regenerating the IP audio stream of a second specified protocol, and distributing the IP audio stream of the second specified protocol to an IP audio stream distribution address URL2 in an IP channel specified by the OpenID in real time; the OpenID is used to distinguish between different IP audio streams and to specify the URL1 and URL 2; the terminal is used for receiving and playing the streaming media data transmitted by the transmission overlay network.
8. The emergency broadcast multi-channel streaming media broadcasting system of claim 7, wherein the TS channel comprises a DVB-C cable digital television transmission system or a DTMB terrestrial digital television transmission system, and correspondingly, the terminal comprises a DVB-C terminal or a DTMB terminal; the IP channel comprises an IP transmission system or an FM-RDS broadcast transmission system, and correspondingly, the terminal comprises an IP terminal or an FM-RDS terminal.
9. The emergency broadcast multi-channel streaming media broadcasting system of claim 8,
the streaming media distribution service is configured to, when audio data in a specified format is converted into a tsoverlap audio stream and it is determined that a TS channel to be distributed is a DVB-C cable digital television transmission system or a DTMB terrestrial digital television transmission system, specifically include:
s11, judging whether the PORT-PID mapping table corresponding to the DVB-C cable digital television transmission system or the DTMB terrestrial digital television transmission system is successfully acquired, whether the IP multiplexer corresponding to the DVB-C cable digital television network or the DTMB terrestrial digital television network is correctly configured, if so, executing the step S13, otherwise, executing the step S12;
s12, obtaining the PORT-PID mapping table from the emergency broadcast management server, and configuring an IP multiplexer according to the PORT-PID mapping table;
s13, judging whether there is free circuit in the PORT-PID mapping table, if yes, executing step S14, otherwise, ending;
s14, acquiring an idle line in the PORT-PID mapping table;
s15, pushing the TSOVIP audio stream to an IP multiplexer port corresponding to any idle line;
and S16, outputting the TSOVIP audio stream to a corresponding DVB-C network adaptation system or DTMB network adaptation system by the IP multiplexer after multiplexing, and transmitting the TSOVIP audio stream to the DVB-C terminal or the DTMB terminal through the HFC or DTMB transmitting station.
10. The emergency broadcast multi-channel streaming media broadcasting system of claim 8,
the streaming media distribution service is used for converting the audio data in the specified format into an IP audio stream and judging that an IP channel to be distributed is an IP transmission system: distributing the IP audio stream of the second specified protocol to an IP audio stream distribution address URL2 in an IP channel specified by OpenID in real time through a streaming media distribution service; the audio program is output to the IP terminal after transmission, and the IP terminal plays the audio program through the obtained playing instruction containing the URL 2;
when the audio data is converted into an IP audio stream and the IP channel to be distributed is judged to be an FM-RDS broadcast transmission system: distributing the IP audio stream of the second specified protocol to an IP audio stream distribution address URL2 in an IP channel specified by OpenID in real time through a streaming media distribution service; the audio broadcasting system is transmitted and then output to an FM-RDS network adaptation system, the FM-RDS network adaptation system obtains a switching instruction containing URL2 from an emergency broadcasting management server, corresponding IP audio streams are selected according to URL2 switching, the IP audio streams are converted into FM signals and then output to an FM-RDS terminal through a frequency modulation transmitting station, and the FM-RDS terminal plays audio programs through a playing instruction obtained from the emergency broadcasting management server.
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| CN111628839B (en) * | 2020-04-21 | 2021-03-19 | 伟乐视讯科技股份有限公司 | Control method of emergency broadcast audio broadcasting and forwarding platform system |
| CN111866524A (en) * | 2020-08-13 | 2020-10-30 | 珠海迈越信息技术有限公司 | Portable stream media acquisition system and method based on microcomputer |
| CN112584324A (en) * | 2020-11-19 | 2021-03-30 | 福建新大陆通信科技股份有限公司 | Emergency broadcast multi-path telephone short message access broadcasting method |
| CN113890659A (en) * | 2021-03-17 | 2022-01-04 | 广州市保伦电子有限公司 | Audio broadcasting method based on pipeline |
| CN115914659A (en) * | 2022-03-24 | 2023-04-04 | 北京有限元科技有限公司 | Plug flow method, device, equipment, system and computer readable storage medium |
| CN116094934B (en) * | 2023-02-08 | 2023-10-17 | 广东保伦电子股份有限公司 | Butt joint linkage method, device and system for broadcasting system |
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