CN101184195B - Audio/video living broadcast system and method - Google Patents
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- CN101184195B CN101184195B CN2007103041446A CN200710304144A CN101184195B CN 101184195 B CN101184195 B CN 101184195B CN 2007103041446 A CN2007103041446 A CN 2007103041446A CN 200710304144 A CN200710304144 A CN 200710304144A CN 101184195 B CN101184195 B CN 101184195B
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Abstract
The invention discloses an audio/video live broadcasting system and method, which comprises a client side of data acquisition and a live-cast server; wherein, the client side of data acquisition is arranged on the mobile communication terminal to acquire the audio/video data stream recorded by the mobile communication terminal and send the acquired audio/video data stream to the live-cast server in real-time; the received audio/video data stream is made as live-cast resource by the livecast server and is broadcast in real-time. The invention has the advantages of making the audio/video recorded by the mobile communication terminal in real-time as the livecast resource of the internet live system, broadcasting the audio/video recorded by the mobile communication terminal in real-time on the internet, and utilizing the mobile phone and other mobile communication terminals to broadcast the recorded audio/video data conveniently.
Description
Technical field
The present invention relates to mobile communication and Internet communication technology, relate in particular to a kind of live live broadcast system of audio/video and live broadcasting method of carrying out on the internet.
Background technology
At present, mobile communication terminal (for example mobile phone, wireless Palm Pilots etc.) not only can be realized basic conversation, transmitting-receiving SMS, but also microphone and camera can be housed, to record audio/video (being audio frequency and/or video) data, for example recording audio fragment, capture video short-movie etc.
Also there is " mobile phone is live " application technology at present, this type of technical scheme is that the client software of live broadcast system is installed on mobile communication terminals such as mobile phone, on the direct broadcast server of the Internet, audio/video file or TV feed are exported as live source, by direct broadcast server the data flow of live source is sent to mobile communication terminal, thereby can on mobile communication terminal, watch live audio/video.
But above-mentioned prior art scheme just flows the audio/video data of the Internet side as live source.At present also not the technical scheme of the audio/video of real-time recording on the mobile communication terminal as live source, though many mobile communication terminals all have the function of real-time recording video recording, but can only realize the function of personal entertainment, the audio/video of mobile communication terminal real-time recording can not be shared to other people by the Internet is live.
Summary of the invention
In view of this, technical problem to be solved by this invention is to provide a kind of audio/video live broadcast system, can realize the live source of the audio/video of mobile communication terminal real-time recording, thereby go out the audio/video of mobile communication terminal real-time recording is live on the internet as the Internet live broadcast system.
Another technical problem to be solved by this invention is to provide a kind of audio/video live broadcasting method, can realize the live source of the audio/video of mobile communication terminal real-time recording, thereby go out the audio/video of mobile communication terminal real-time recording is live on the internet as the Internet live broadcast system.
In order to realize the foregoing invention purpose, main technical schemes of the present invention is:
A kind of audio/video live broadcast system comprises: direct broadcast server, be arranged at the data acquisition client of mobile communication terminal; Wherein:
Described data acquisition client is used to gather the audio/video data that mobile communication terminal self is recorded, and to audio/video data coding and the fragmented storage that collects, and the stream of the audio/video data after will encoding sends to described direct broadcast server in real time;
Described formats stored is: audio/video frame number N+ video code model+audio coding form+N frame of video and audio frame; Wherein, the form of frame of video and audio frame is: video requency frame data length+timestamp+video data+audio frame data length+timestamp+voice data; Described timestamp is used for the sequential of record tone/video data stream;
Described direct broadcast server is used for the audio/video data stream that receives is play in real time as live source.
Preferably, described data acquisition client specifically comprises:
Acquisition module is used for video record interface and the real-time image data of audio recording interface from mobile communication terminal; Coding module is used for the digital coding of acquisition module collection is become data flow; Last transmission module is used for the data flow after described direct broadcast server real-time segmentation sends coding.
Preferably, described data acquisition client comprises that further frequency acquisition is provided with module, is used to be provided with frequency acquisition, and described acquisition module further carries out data acquisition according to set frequency acquisition.
Preferably, described direct broadcast service implement body comprises form judge module, format converting module and live module, wherein:
The form judge module is used to judge whether the form of the audio/video data stream of reception is the form that direct broadcast server is supported, if then described audio/video data stream is sent to described live module; Otherwise described audio/video data stream is sent to described format converting module;
Format converting module is used for described audio/video data circulation is changed to the form that direct broadcast server is supported, and sends to live module;
Live module is used for described audio/video data stream is play in real time as live source.
Preferably, described data acquisition client sends audio/video data stream by mobile communications network to described direct broadcast server.
Preferably, described live broadcast system further comprises transfer server, and an end is by mobile communications network and described data acquisition client communication, and the other end is communicated by letter with described direct broadcast server by the Internet; Described data acquisition client sends to this transfer server with described audio/video data stream, by this transfer server described direct broadcast server is issued in described audio/video data circulation.
Preferably, comprise the transmission control protocol tcp module on the data acquisition client of described mobile communication terminal and the described transfer server, be used to set up TCP and connect, utilize the TCP that is set up to connect and communicate.
A kind of audio/video live broadcasting method comprises:
A, the data acquisition client that is arranged at mobile communication terminal are gathered the audio/video data that mobile communication terminal self is recorded in real time, to audio/video data coding and the fragmented storage that collects;
Described formats stored is: audio/video frame number N+ video code model+audio coding form+N frame of video and audio frame; Wherein, the form of frame of video and audio frame is: video requency frame data length+timestamp+video data+audio frame data length+timestamp+voice data; Described timestamp is used for the sequential of record tone/video data stream;
B, the stream of the audio/video data after will encoding send to direct broadcast server in real time;
C, direct broadcast server are play the audio/video data stream that receives in real time as live source.
Preferably, described steps A is specially: from the video record interface and the real-time image data of audio recording interface of mobile communication terminal; The digital coding of described real-time collection is become data flow.
Preferably, described method further sets in advance frequency acquisition, and in steps A, according to video record interface and the audio recording interface real-time image data of default frequency acquisition from described mobile communication terminal.
Preferably, described step B is specially: according to the audio/video data stream of predetermined unit interval behind the described coding of fragmented storage on the mobile communication terminal; Simultaneously successively every segment data stream of being stored is sent to direct broadcast server, every transmission success one piece of data stream is then deleted this segment data stream.
Preferably, among the described step C after direct broadcast server is received audio/video data stream, play before, further comprise: judge the form whether form of the audio/video data stream that is received is supported for this direct broadcast server; If the form that this direct broadcast server is supported is then play described audio/video data stream as live source in real time; Otherwise, the audio/video data circulation that is received is changed to the form that this direct broadcast server is supported, the audio/video data stream after will changing is again play in real time as live source.
Preferably, described step B is specially: B1, the audio/video data stream after will encoding by mobile communications network send to a transfer server; B2, described transfer server are issued described direct broadcast server by the Internet with described audio/video data circulation.
Preferably, before the steps A, further comprise: mobile communication terminal sends the direct broadcast band request of creating to direct broadcast server, and direct broadcast server is received request back establishment direct broadcast band, and the channel identication of correspondence is sent to mobile communication terminal; Among the step B, when sending audio/video data stream, send channel identication to direct broadcast server; Among the step C, direct broadcast server further is set to the audio/video data stream that receives on the corresponding direct broadcast band, plays described audio/video data stream on this direct broadcast band in real time.
Because the present invention gathers audio/video data stream in the process of mobile communication terminal real-time recording audio/video, and be real-time transmitted to the direct broadcast server of network side, by direct broadcast server described audio/video data stream is play in real time, therefore, the present invention can realize the live source of the audio/video of mobile communication terminal real-time recording as every networking live broadcast system, thereby go out the audio/video of mobile communication terminal real-time recording is live on the internet, can allow other people share the audio/video that mobile communication terminal is recorded, make things convenient for the user to utilize the live audio/video datas of recording of mobile communication terminal such as mobile phone whenever and wherever possible, even a mobile phone can be used as a Network TV Station.
The present invention is directed to the slow and unsettled present situation of mobile communications network of present mobile communication terminal processor speed, can further be optimized, for example frequency acquisition can be set, from the audio/video data that mobile communication terminal is recorded, gather discrete data point (inwhole image data) according to frequency acquisition, can also segmentation upload audio/video data stream to network side, therefore can reduce the transmission quantity of data, reduce taking to the network service bandwidth, improve live speed, guarantee the smoothness row of live picture and tonequality.
Originally return transfer server can be set, one end is by mobile communications network and mobile communication terminal address, the other end connects the Internet and communicates by letter with described direct broadcast server, mobile communication terminal sends to transfer server with audio/video data stream earlier, be transmitted to direct broadcast server by transfer server again, therefore can solve the problem of the communication quality difference of utilizing the direct access internet of the second generation (2G) mobile communications network at present.For the third generation (3G) mobile communications network, because the direct access internet of mobile communication terminal also can have communication quality preferably, therefore transfer server can be set, mobile communication terminal directly sends audio/video data and flows to direct broadcast server.
Description of drawings
Fig. 1 is the composition schematic diagram of audio/video live broadcast system of the present invention;
Fig. 2 is a kind of structural representation of data acquisition client of the present invention;
Fig. 3 is a kind of structural representation of audio/video direct broadcast server of the present invention;
Fig. 4 is a kind of implementing procedure figure of audio/video live broadcasting method of the present invention.
Embodiment
Below by specific embodiments and the drawings the present invention is described in further details.
Fig. 1 is the composition schematic diagram of audio/video live broadcast system of the present invention.Referring to Fig. 1, this system comprises: data acquisition client 101, transfer server 102 and direct broadcast server 103; Wherein:
Described data acquisition client 101 is arranged on the mobile communication terminal 100, is used to gather the audio/video data stream that mobile communication terminal 100 is recorded, and the audio/video data stream that collects is sent to described transfer server 102 in real time.
Described transfer server 102 1 ends are communicated by letter with described data acquisition client 101 by mobile communications network 11, and the other end is communicated by letter with described direct broadcast server 103 by the Internet 12; Described data acquisition client 101 sends to this transfer server 102 with described audio/video data, by this transfer server 102 described audio/video data is transmitted to described direct broadcast server 103.
Described direct broadcast server 103 is the server of the Internet live broadcast system, is provided with on the internet, is used for the audio/video data stream that receives is play on the internet in real time as live source.
Among the described embodiment of Fig. 1, transfer server 102 transfers are adopted in the communication between data acquisition client 101 and the direct broadcast server 103, and transfer server 102 adopts the two nets of mobile communications network and the Internet to insert.Because the speed of the direct-connected interconnected network mode of mobile communication terminal (for example CMNET mode) is very slow at present, and rate are more expensive, the user is less, and the user of the mode (for example CMWAP) by wireless application protocol (wap) proxy access the Internet is more, so use transfer server 102 to carry out interim data in the foregoing description, a kind of transfer server is for example arranged at present, the data forwarding that the data acquisition client can be sent is to the Internet, thereby make user velocity stable, communication quality is poor in the time of can solving the direct access internet of mobile communication terminal, the problem that rate are high.But, development optimization along with mobile communications network, for example after the opening of 3G network, because the direct access internet of mobile communication terminal also can have communication quality preferably, therefore also transfer server 102 can be set, mobile communication terminal directly sends audio/video data and flows to direct broadcast server 103.
Communication between described data acquisition client 101 and the described transfer server 102 can be based on the radio communication of mobile communications network, can adopt existing ripe mobile communication module to carry out transfer of data, wherein a kind of preferred mode is that transmission control protocol (TCP) module 104 is set on data acquisition client 101 and transfer server 102, being used to set up TCP connects, utilize the TCP that is set up to connect and communicate, transmit described multimedia messages.The advantage that described TCP connects is that transfer of data is stable, speed is fast.
Fig. 2 is a kind of structural representation of data acquisition client of the present invention.Referring to Fig. 2, described data acquisition client 101 specifically comprises:
Acquisition module 201 is used for gathering audio/video data in real time from the audio recording interface 22 and the video record interface 23 of mobile communication terminal 100.The interface that described audio recording interface 22 and video record interface 23 carry for the mobile communication terminal with video and audio recording function, be connected with camera 21 with microphone 20 respectively, voice data that microphone 20 and camera 21 are recorded and video data are by these two interface outputs.
In order to reduce the bandwidth that data flow takies, described data acquisition client 101 can comprise further that also frequency acquisition is provided with module 204, is used to be provided with frequency acquisition, and described acquisition module 201 further carries out data acquisition according to set frequency acquisition.For example the user can be provided with the data acquisition number of times in the per second, and default number of times is N.Data acquisition client like this 101 will be carried out data acquisition to mobile phone cam 21 and microphone 20 every the 1/N time of second, thereby gather the discrete point of audio/video data, but times of collection the continuity that need not influence tonequality and picture is set.
Fig. 3 is a kind of structural representation of direct broadcast server of the present invention.Referring to Fig. 3, described direct broadcast server 103 mainly comprises live module 303, the audio/video data stream that is used for receiving is arranged on corresponding channel as live source, and play in real time, when the corresponding channel of internet user access direct broadcast server 103, then can watch the audio/video program that broadcasts on this channel, go out thereby the audio/video that mobile communication terminal can be recorded is live on the internet.
Because the restriction of mobile communication terminal processor at present, the form of the audio/video of mobile communication terminal shooting, collecting is generally different with the form that direct broadcast server is supported, so referring to Fig. 3, the present invention can also comprise form judge module 301 and format converting module 302.Described form judge module 301 is used to judge whether the form of the audio/video data stream of reception is the form that this direct broadcast server 103 is supported, if then described audio/video data stream is sent to described live module 303; Otherwise described audio/video data stream is sent to described format converting module 302.Format converting module 302 is used for described audio/video data circulation is changed to the form that direct broadcast server 103 is supported, and sends to live module 303.Live module 303 is play the data flow of receiving as live source more in real time.
Fig. 4 is a kind of implementing procedure figure of audio/video live broadcasting method of the present invention.Described in the present embodiment mobile communication terminal is the mobile phone with recording camera function, and described data acquisition client is installed on the mobile phone, and referring to Fig. 4, this flow process comprises:
Step 411, user can select to be provided with channel functions at any time, input needs the channel designation of establishment in mobile phone, after being provided with successfully, the data acquisition client is set up TCP with the transfer server end and is connected, and organize one to create the channel data bag, send to transfer server, be used for request and create channel.The form of described establishment channel data bag such as following formula (1):
Begin sign+QQ number length+QQ number+channel designation length+channel designation (1)
Wherein said QQ number is a kind of identify label of user, and described transfer server and direct broadcast server can authenticate the user according to this QQ number, has only authentication by carrying out the live related procedure of audio/video of the present invention.
Step 412, transfer server are after receiving above-mentioned establishment channel data bag, this establishment channel data bag is transmitted to direct broadcast server, direct broadcast server is after receiving establishment channel data bag, for the user creates channel, and the channel identication of creating sent to transfer server, transfer server connects channel identication and sends to the data acquisition client by TCP.Its return data packet format is as shown in the formula (2):
Begin the success+error code (2) of sign+whether
After described data acquisition client is received the packet that returns,, then store the channel identication of being created, when the subsequent acquisition audio/video data, the channel identication of correspondence can be sent to direct broadcast server if create the channel success.In addition, step 401 is candidate's steps, and this step 401 is not to realize the steps necessary of the object of the invention.
In this step 402, the user can set in advance frequency acquisition, and the number of times of per second kind data acquisition for example is set, and default number of times is N.Data acquisition client like this can be installed default frequency acquisition and be carried out data acquisition, for example every the 1/N time of second, mobile phone cam and microphone is carried out data acquisition.To carry out specific coding to the audio/video data that collects then, the coded format of generally selecting user mobile phone to support, for example present embodiment adopts at present popular 3GP form coding.Be the unit fragmented storage with the audio/video data stream that is encoded to the special time at last, for example this sentences and for unit described audio/video data flow point section is stored in the mobile phone EMS memory second.Storage format is as with following formula (3):
Audio/video frame number N+ video code model+audio coding form+[N video and audio frame] (3)
Wherein, the form of frame of video and audio frame is:
Video requency frame data length+timestamp+video data+voice data length+timestamp+voice data
Described timestamp is used for the sequential of record tone/video data stream, when direct broadcast server can be play audio/video according to this timestamp.
Audio/video data stream after step 403, data acquisition client will be encoded uploads to the transfer server end, and transfer server sends to direct broadcast server to audio/video data stream again.Detailed process is:
After the data acquisition coding, the data acquisition client constantly with the data flow packing of each segmentation (for example per second), connects the described packet of transmission to the transfer server end by TCP.Described data packet format is as shown in the formula (4):
Begin sign+channel identication+video name+packet sequence number+data content (4)
Wherein, described data content is the concrete data format behind the capturing and coding, is specially the data format shown in the formula (3).
The data acquisition client is deleted this segment data stream, and is begun to send the data flow of next segmentation after sending every segment data stream from mobile phone EMS memory.The transfer server end is transmitted to direct broadcast server with it behind the packet that receives above-mentioned formula (4).
After step 404, direct broadcast server are received described audio/video data stream, this audio/video data stream is play in real time as live source.Specifically comprise:
After direct broadcast server receives the packet of described formula (4), can read the format information of audio/video data earlier, judge whether to carry out format conversion.If the form of the audio/video data that receives stream is not the form that this direct broadcast server is supported, then need format conversion, after each frame of video and audio frame read, the frame of video that reads and the format conversion of audio frame are become the form of supporting in the direct broadcast server, for example be generally the WMV form; Frame of video after the conversion and the synthetic WMV data flow of audio frame, this WMV data flow just can be used as the live source of direct broadcast server then; Read the channel identication in the formula (4) simultaneously, live source is arranged on the channel of the correspondence of being created and plays.If the form of the audio/video data that receives stream is the form that this direct broadcast server is supported, then do not need format conversion, directly the audio/video data that is received is flowed live source as direct broadcast server, read the channel identication in the formula (4) simultaneously, live source is arranged on the channel of the correspondence of being created and plays.
After this, if the described channel of the user of direct broadcast server this direct broadcast server of sign-on access from the Internet, then direct broadcast server just can be pushed the audio/video data stream of current broadcast to the user of described sign-on access, so this user just can watch the programme televised live of described channel on the internet.
In the such scheme, because the audio/video form that mobile phone is supported is limited, the form that each cell phone manufacturer supports also is not quite similar, so need be at the form of direct broadcast server with the support of audio/video format conversion cost direct broadcast server.Continuous development along with correlation techniques such as handset processes devices, after supporting the form (for example WMV form) of direct broadcast server on the mobile phone, then direct broadcast server will not need to change the audio/video that receives and just can play, and can significantly reduce live time-delay, improve server efficient.
Go up the communication between data acquisition client and direct broadcast server in the fast scheme, adopt the transfer server transfer.After 3G network was opened, along with the lifting of mobile network's bandwidth and speed, described method also can directly send audio/video data by 3G network by the data acquisition client and flow to direct broadcast server.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (14)
1. an audio/video live broadcast system is characterized in that, comprising: direct broadcast server, be arranged at the data acquisition client of mobile communication terminal; Wherein:
Described data acquisition client is used to gather the audio/video data that mobile communication terminal self is recorded, and to audio/video data coding and the fragmented storage that collects, and the stream of the audio/video data after will encoding sends to described direct broadcast server in real time;
Described formats stored is: audio/video frame number N+ video code model+audio coding form+N frame of video and audio frame; Wherein, the form of frame of video and audio frame is: video requency frame data length+timestamp+video data+audio frame data length+timestamp+voice data; Described timestamp is used for the sequential of record tone/video data stream;
Described direct broadcast server is used for the audio/video data stream that receives is play in real time as live source.
2. audio/video live broadcast system according to claim 1 is characterized in that, described data acquisition client specifically comprises:
Acquisition module is used for video record interface and the real-time image data of audio recording interface from mobile communication terminal;
Coding module is used for the digital coding of acquisition module collection is become data flow;
Last transmission module is used for the data flow after described direct broadcast server real-time segmentation sends coding.
3. audio/video live broadcast system according to claim 2, it is characterized in that, described data acquisition client comprises that further frequency acquisition is provided with module, is used to be provided with frequency acquisition, and described acquisition module further carries out data acquisition according to set frequency acquisition.
4. audio/video live broadcast system according to claim 1 is characterized in that, described direct broadcast service implement body comprises form judge module, format converting module and live module, wherein:
The form judge module is used to judge whether the form of the audio/video data stream of reception is the form that direct broadcast server is supported, if then described audio/video data stream is sent to described live module; Otherwise described audio/video data stream is sent to described format converting module;
Format converting module is used for described audio/video data circulation is changed to the form that direct broadcast server is supported, and sends to live module;
Live module is used for described audio/video data stream is play in real time as live source.
5. audio/video live broadcast system according to claim 1 is characterized in that, described data acquisition client sends audio/video data stream by mobile communications network to described direct broadcast server.
6. audio/video live broadcast system according to claim 1 is characterized in that this system further comprises transfer server, and an end is by mobile communications network and described data acquisition client communication, and the other end is communicated by letter with described direct broadcast server by the Internet; Described data acquisition client sends to this transfer server with described audio/video data stream, by this transfer server described direct broadcast server is issued in described audio/video data circulation.
7. audio/video live broadcast system according to claim 6, it is characterized in that, comprise the transmission control protocol tcp module on the data acquisition client of described mobile communication terminal and the described transfer server, be used to set up TCP and connect, utilize the TCP that is set up to connect and communicate.
8. an audio/video live broadcasting method is characterized in that, comprising:
A, the data client that is arranged at mobile communication terminal are gathered the audio/video data that mobile communication terminal self is recorded in real time, to audio/video data coding and the fragmented storage that collects;
Described formats stored is: audio/video frame number N+ video code model+audio coding form+N frame of video and audio frame; Wherein, the form of frame of video and audio frame is: video requency frame data length+timestamp+video data+audio frame data length+timestamp+voice data; Described timestamp is used for the sequential of record tone/video data stream;
B, the stream of the audio/video data after will encoding send to direct broadcast server in real time;
C, direct broadcast server are play the audio/video data stream that receives in real time as live source.
9. audio/video live broadcasting method according to claim 8 is characterized in that, described steps A is specially: from the video record interface and the real-time image data of audio recording interface of mobile communication terminal; The digital coding of described real-time collection is become data flow.
10. audio/video live broadcasting method according to claim 9, it is characterized in that, this method further sets in advance frequency acquisition, and in steps A, according to video record interface and the audio recording interface real-time image data of default frequency acquisition from described mobile communication terminal.
11. audio/video live broadcasting method according to claim 8 is characterized in that, described step B is specially: according to the audio/video data stream of predetermined unit interval behind the described coding of fragmented storage on the mobile communication terminal; Simultaneously successively every segment data stream of being stored is sent to direct broadcast server, every transmission success one piece of data stream is then deleted this segment data stream.
12. audio/video live broadcasting method according to claim 8, it is characterized in that, among the described step C after direct broadcast server is received audio/video data stream, play before, further comprise: judge the form whether form of the audio/video data stream that is received is supported for this direct broadcast server;
If the form that this direct broadcast server is supported is then play described audio/video data stream as live source in real time; Otherwise, the audio/video data circulation that is received is changed to the form that this direct broadcast server is supported, the audio/video data stream after will changing is again play in real time as live source.
13. audio/video live broadcasting method according to claim 8 is characterized in that, described step B is specially:
B1, the audio/video data stream after will encoding by mobile communications network send to a transfer server;
B2, described transfer server are issued described direct broadcast server by the Internet with described audio/video data circulation.
14. audio/video live broadcasting method according to claim 8, it is characterized in that, before the steps A, further comprise: mobile communication terminal sends the direct broadcast band request of creating to direct broadcast server, direct broadcast server is received request back establishment direct broadcast band, and the channel identication of correspondence is sent to mobile communication terminal;
Among the step B, when sending audio/video data stream, send channel identication to direct broadcast server;
Among the step C, direct broadcast server further is set to the audio/video data stream that receives on the corresponding direct broadcast band, plays described audio/video data stream on this direct broadcast band in real time.
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