CN101945096A - Video live broadcast system facing to set-top box and PC of mobile phone and working method thereof - Google Patents

Video live broadcast system facing to set-top box and PC of mobile phone and working method thereof Download PDF

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Publication number
CN101945096A
CN101945096A CN2010102257055A CN201010225705A CN101945096A CN 101945096 A CN101945096 A CN 101945096A CN 2010102257055 A CN2010102257055 A CN 2010102257055A CN 201010225705 A CN201010225705 A CN 201010225705A CN 101945096 A CN101945096 A CN 101945096A
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video
unit
audio
mobile phone
server
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CN2010102257055A
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Chinese (zh)
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CN101945096B (en
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董道国
李青
罗璇滨
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上海未来宽带技术及应用工程研究中心有限公司
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Abstract

The invention discloses a video live broadcast system facing to a set-top box and a PC of a mobile phone and a working method thereof and relates to the technical field of network multimedia television, the field of video transmission and the field of mobile phone communication, the system comprises a mobile phone as a video source of the video live broadcast system and a video server which is connected with a mobile phone antenna, wherein the mobile phone comprises a video acquisition unit, a mobile phone video encoding unit, an audio acquisition unit, an audio encoding unit, a writing unit, a mobile phone storage unit, an antenna transceiving unit and a deleting unit; and the video server comprises a network communication unit, a video decoding unit, an audio decoding unit, a data buffer unit, a server storage unit, an audio and video synchronization unit, a live broadcast command processing unit, a server video encoding unit, a server audio encoding unit, a live broadcast data transmitting unit and the like. The system and the working method thereof can realize the function of acquiring a video by applying the mobile phone and carrying out live broadcast facing to a variety of types of terminals, in particular to the set-top boxes through 3G wireless network, WIFI or GPRS wireless communication network.

Description

Mobile phone carries out the system and the method for work thereof of net cast towards set-top box and PC

Technical field

The present invention relates to network multimedia TV technology, field of video transmission, mobile communication field, relate in particular to the architecture design scheme that is applied to mobile video collection and monitoring field.

Background technology

Mobile video is live to be to adopt the mobile phone capture video that has camera, and go out by the net cast that network will taken, the TV set-top box that other people can be by having the IP ability to communicate in live or the PC or the mobile phone of networking are watched video.

At present the technical difficulty that exists of mobile phone live video be mobile phone the calculation process ability a little less than, the network mode that mobile phone connects INTERNET has 3G, WIFI, GPRS, these modes are all more unreliable with respect to wired connection, and bandwidth is lower, GPRS network connecting mode especially, and it uploads bandwidth below per second tens KBYTE.Therefore, existing way is by the mobile phone photographic images, and then plays for user side after by computer etc. the image of its shooting being delivered to the program production platform editor of TV station or the like.

Yet, requirement to video coding during dissimilar user terminal watching video live broadcast is different, and interaction protocol is also different, what when watching live video as PC be that requirement obtains is the FLASH video, it is MPEG that set-top box is watched the type of coding that requires when live, 2, the type of coding that requires when mobile phone is watched live video is H263, and existing a kind of direct broadcast server sends all client can only be video flowing with a kind of type of coding, this just causes the service range of each live video server very limited, make video server supplier be difficult to obtain more profit, and, for client, the video flowing of different coding type that if it need, then need to connect different types of live video server, make that the use of client is very inconvenient.

Therefore, how with mobile phone as video source and the limitation that breaks through existing live video server, forms a kind of with mobile phone towards the system that set-top box and PC carry out net cast, reality has become the technical task that those skilled in the art need to be resolved hurrily.

Summary of the invention

The object of the present invention is to provide a kind of mobile phone to carry out the system and the method for work thereof of net cast towards set-top box and PC.

Reach other purposes in order to achieve the above object, mobile phone provided by the invention comprises towards the system that set-top box and PC carry out net cast: mobile phone and the video server that is connected with mobile phone wireless.

Wherein, described mobile phone comprises: the mobile phone memory cell that is used to store and cushion transmission information; Be used to absorb the mobile video collecting unit of vision signal; The handset audio collecting unit of the audio signal that is used to gather; Be used for mobile video coding unit that the vision signal that described mobile video collecting unit is absorbed is carried out real-time coding; Be used for handset audio coding unit that the audio signal that mobile phone audio collection unit is gathered is carried out real-time coding; The buffer area that is used for the data after described mobile video coding unit and each own coding of handset audio coding unit are write described mobile phone memory cell respectively with the writing unit treating to send respectively, be used for data wireless with described buffer area and be sent to wireless transmit/receive units on the described video server; And the delete cells that is used for the data deletion that the described wireless transmit/receive units with described buffer area sent.

Described video server comprises: the server storage unit that is used to store audio, video data; Be used to receive and dispatch network communication unit from the information of the wireless transmit/receive units of described mobile phone and live client; The video data decoding that is used for the described mobile phone that described network communication unit receives is uploaded is the video decoding unit of YUV video data; Be used for the voice data that the described mobile phone that described network communication unit receives is uploaded is decoded as the audio decoding unit of audio frequency PCM formatted data; Be used for the audio frequency PCM of gained after video decoding unit and the audio decoding unit decoding and the buffer area that YUV video data is put into described server storage unit are given buffer memory respectively in order to stand-by data buffer unit; Be used for the audio, video data of data buffer area is carried out synchronous audio-visual synchronization unit according to its timestamp; Be used to handle the live request of the live client that described network communication unit receives, to determine the live Signaling Processing Unit of the needed audio/video information of live client and its audio/video coding form that is adopted; Be used for the corresponding YUV video data of buffer memory being carried out the server video encoding unit of corresponding encoded according to described live Signaling Processing Unit needed audio/video information of determined live client and audio/video coding form; Be used for the corresponding audio frequency PCM data of buffer memory being carried out the server audio coding unit of corresponding encoded according to described live Signaling Processing Unit needed audio/video information of determined live client and audio/video coding form; Be used for the audio, video data behind server video encoding unit and the server audio coding unit coding is transferred to the live data transmitting element that the network communication unit sends to live client.

In addition, described video server can comprise that also one is used for the audio, video data behind server video encoding unit and the server audio coding unit coding is according to industrial standard generated the video file of standard, and deposits the merging stream unit that described server storage unit is used for the non-live program request of client in.

Mobile phone of the present invention carries out the method for work of the system of net cast towards set-top box and PC, comprise step: 1) handset audio collecting unit and mobile video collecting unit are gathered voice data and video data respectively, and the data of being gathered are separately carried out time mark with current acquisition time; 2) mobile video coding unit and handset audio coding unit are separately encoded video data and voice data separately; 3) data of the writing unit of mobile phone after with described mobile video coding unit and each own coding of the handset audio coding unit buffer area that writes described mobile phone memory cell respectively sends respectively treating; 4) data wireless in the described buffer area of the wireless transmit/receive units of mobile phone is sent on the video server, the data deletion that the delete cells of mobile phone has sent the described wireless transmit/receive units in the described buffer area; 5) the network communication unit of video server receives from the voice data of the wireless transmit/receive units of described mobile phone and video data and live client and sends live request; 6) video decoding unit of video server and audio decoding unit separately described network communication unit is received video data decoding be that YUV video data, voice data are decoded as audio frequency PCM formatted data; 7) data buffer unit of video server gives buffer memory respectively in order to stand-by with the audio frequency PCM of video decoding unit and the back gained of audio decoding unit decoding and the buffer area that YUV video data is put into described server storage unit; 8) the audio-visual synchronization unit of video server carries out the audio, video data in the buffer area synchronously according to its timestamp; 9) the live Signaling Processing Unit of video server is handled the live request of the live client of described network communication unit reception, to determine the needed audio/video information of live client and its audio/video coding form that is adopted; 10) the server video encoding unit of video server and server audio coding unit be separately according to described live Signaling Processing Unit needed audio/video information of determined live client and audio/video coding form, the corresponding YUV video data of buffer memory carried out corresponding encoded and corresponding audio frequency PCM data are carried out corresponding encoded; And 11) audio, video data of the live data transmitting element of video server after with server video encoding unit and server audio coding unit coding transferred to the network communication unit and sent to live client.

In addition, the audio, video data of the merging stream unit that also can comprise server after with video encoding unit and audio coding unit coding according to industrial standard generates the video file of standard, and deposits the step that described memory cell is used for the non-live program request of client in.

In sum, after mobile phone of the present invention carries out net cast towards set-top box and PC system sends to video server by the mobile phone as the video source of video living transmission system with audio, video data, video server should each live client request, video data and voice data are met the coding that each client requires separately, thus, can realize uploading one road real-time audio frequency and video input and the audio/video flow of output multichannel different-format by mobile phone.To satisfy the demand of different clients, can promote the attraction of mobile phone and video server greatly.

Description of drawings

Fig. 1 carries out net cast for mobile phone of the present invention towards set-top box and PC system architecture schematic diagram.

Fig. 2 carries out the mobile phone configuration diagram in the system of net cast towards set-top box and PC for mobile phone of the present invention.

Fig. 3 carries out the video server configuration diagram in the system of net cast towards set-top box and PC for mobile phone of the present invention.

Embodiment

See also Fig. 1, mobile phone of the present invention comprises with the system that PC carries out net cast at least towards set-top box: mobile phone and the video server that is connected with mobile phone wireless.

See also Fig. 2, described mobile phone comprises: be used for the mobile phone memory cell that stored information and buffering send; Be used to absorb the mobile video collecting unit of vision signal; The handset audio collecting unit of the audio signal that is used to gather; Be used for mobile video coding unit that the vision signal that described mobile video collecting unit is absorbed is carried out real-time coding; Be used for handset audio coding unit that the audio signal that mobile phone audio collection unit is gathered is carried out real-time coding; The buffer area that is used for the data after described mobile video coding unit and each own coding of handset audio coding unit are write described mobile phone memory cell respectively with the writing unit treating to send respectively, be used for data wireless with described buffer area and be sent to wireless transmit/receive units on the described video server; And the delete cells that is used for the data deletion that the described wireless transmit/receive units with described buffer area sent.

Wherein, described handset audio collecting unit can be gathered the audio signal of 20ms at every turn, and the audio signal that will at every turn gather is disconnected stamps current timestamp; Described handset audio coding unit adopts AMR or mp3 coded format to encode; The sample frequency of described mobile video collecting unit in can per second 12 to 30 width of cloth scopes gathered vision signal, and the vision signal that will at every turn gather is stamped current timestamp; Described mobile video coding unit adopts MPEG2, MPEG4 or H263 playwright, screenwriter form to encode.

See also Fig. 3, described video server comprises: the server storage unit that is used to store audio, video data; Be used to receive and dispatch network communication unit from the information of the wireless transmit/receive units of described mobile phone and live client; The video data decoding that is used for the described mobile phone that described network communication unit receives is uploaded is the video decoding unit of YUV video data; Be used for the voice data that the described mobile phone that described network communication unit receives is uploaded is decoded as the audio decoding unit of audio frequency PCM formatted data; Be used for the audio frequency PCM of gained after video decoding unit and the audio decoding unit decoding and the buffer area that YUV video data is put into described server storage unit are given buffer memory respectively in order to stand-by data buffer unit; Be used for the audio, video data of data buffer area is carried out synchronous audio-visual synchronization unit according to its timestamp; Be used to handle the live request of the live client that described network communication unit receives, to determine the live Signaling Processing Unit of the needed audio/video information of live client and its audio/video coding form that is adopted; Be used for the corresponding YUV video data of buffer memory being carried out the server video encoding unit of corresponding encoded according to described live Signaling Processing Unit needed audio/video information of determined live client and audio/video coding form; Be used for the corresponding audio frequency PCM data of buffer memory being carried out the server audio coding unit of corresponding encoded according to described live Signaling Processing Unit needed audio/video information of determined live client and audio/video coding form; Be used for the audio, video data behind server video encoding unit and the server audio coding unit coding is transferred to the live data transmitting element that the network communication unit sends to live client.

Wherein, the buffer area of described video server can comprise video cache subarea that is used for the buffer memory video data and the audio frequency buffer memory subarea that is used for buffered audio data; And described live client: adopt http protocol or RTSP agreement and network communication unit carry out the live play device of communication and network communication unit adopt http protocol carry out communication PC and and the network communication unit adopt RTSP agreement or http protocol to carry out the set-top box etc. of communication; And described network communication unit adopts Transmission Control Protocol and described wireless transmit/receive units to carry out communication.

In addition, described video server can comprise that also one is used for the audio, video data behind server video encoding unit and the server audio coding unit coding is according to industrial standard generated the video file of standard, and deposits the merging stream unit that described server storage unit is used for the non-live program request of client in.

Above-mentioned mobile phone carries out net cast towards set-top box and PC the method for work of system is as follows:

At first, handset audio collecting unit and mobile video collecting unit are gathered voice data and video data respectively, and the data of being gathered are separately carried out time mark with current acquisition time;

Then, mobile video coding unit and handset audio coding unit are separately encoded video data and voice data separately;

Then, the data of the writing unit of mobile phone after with described mobile video coding unit and each own coding of the handset audio coding unit buffer area that writes described mobile phone memory cell respectively sends respectively treating;

Then, the data wireless in the described buffer area of the wireless transmit/receive units of mobile phone is sent on the video server, the data deletion that the delete cells of mobile phone has sent the described wireless transmit/receive units in the described buffer area;

Then, the network communication unit of video server receives from the voice data of the wireless transmit/receive units of described mobile phone and video data and live client and sends live request;

Then, the video decoding unit of video server and audio decoding unit separately described network communication unit is received video data decoding be that YUV video data, voice data are decoded as audio frequency PCM formatted data;

Then, the data buffer unit of video server gives buffer memory respectively in order to stand-by with the audio frequency PCM of video decoding unit and the back gained of audio decoding unit decoding and the buffer area that YUV video data is put into described server storage unit;

Then, the audio-visual synchronization unit of video server carries out the audio, video data in the buffer area synchronously according to its timestamp;

Then, the live Signaling Processing Unit of video server is handled the live request of the live client of described network communication unit reception, to determine the needed audio/video information of live client and its audio/video coding form that is adopted;

Then, the server video encoding unit of video server and server audio coding unit are separately according to described live Signaling Processing Unit needed audio/video information of determined live client and audio/video coding form, the corresponding YUV video data of buffer memory is carried out corresponding encoded and corresponding audio frequency PCM data are carried out corresponding encoded, both each self energys are carried out multiplex coding simultaneously;

Then, the audio, video data of the live data transmitting element of video server after with server video encoding unit and server audio coding unit coding transferred to the network communication unit and sent to live client;

At last, the audio, video data of the merging of server stream unit after with video encoding unit and audio coding unit coding according to industrial standard generates the video file of standard, and deposits the step that described memory cell is used for the non-live program request of client in.

Therefore, 1, mobile phone is voice data and video requency frame data separately to be sent rather than transmit merge good video flowing; 2, there is a data buffering area in the mobile phone memory cell, promptly voice data behind the coding and video data directly do not send, but put into buffering area earlier, and then by the transmission of from buffering area, fetching data of the wireless transmit/receive units of mobile phone, the purpose of doing like this is because the communication network that mobile phone wireless adopted is also unreliable and bandwidth is lower, can be earlier when network condition is bad data buffering rather than abandon, it is complete can making the video file data of preserving on the video server like this; 3, have independent voice data buffer memory subarea and video data buffer memory subarea in video server, existing for what video server was finished audio frequency and video of these two buffer memory subareas provides condition synchronously; 4, server audio frequency buffer memory subarea and server video cache subarea are in audio decoder module and video decode module rear, what wherein deposit is decoded Voice ﹠ Video data, and this live TV stream of exporting multichannel different coding form simultaneously for video server provides condition; 5, in video server, immediate data transmitting element and stream merge cells are separated, when video server provides direct broadcast service, also preserved a video file like this for the usefulness of carrying out program request in the future; 6, finish in the audio-visual synchronization processing unit of the Synchronous Processing of audio frequency and video in video server, rather than finish in live client.

In sum, mobile phone of the present invention is by the video source of mobile phone as video living transmission system towards system and the method for work thereof that set-top box and PC carry out net cast, and after the data in video server receiver, video source, request that should each live client, video data and voice data are met the coding that each client requires separately, thus, can realize uploading one road real-time audio frequency and video input and the audio/video flow of output multichannel different-format by mobile phone.To satisfy the demand of different clients, can promote the attraction of mobile phone and video server greatly.

The foregoing description just lists expressivity principle of the present invention and effect is described, but not is used to limit the present invention.Any personnel that are familiar with this technology all can make amendment to the foregoing description under spirit of the present invention and scope.Therefore, the scope of the present invention should be listed as claims.

Claims (10)

1. a mobile phone is characterized in that comprising towards the system that set-top box and PC carry out net cast: mobile phone and the video server that is connected with mobile phone wireless, wherein,
Described mobile phone comprises: the mobile phone memory cell that is used to store and cushion transmission information; Be used to absorb the mobile video collecting unit of vision signal; Be used to gather the handset audio collecting unit of audio signal; Be used for mobile video coding unit that the vision signal that described mobile video collecting unit is absorbed is carried out real-time coding; Be used for handset audio coding unit that the audio signal that mobile phone audio collection unit is gathered is carried out real-time coding; The buffer area that is used for the data after described mobile video coding unit and each own coding of handset audio coding unit are write described mobile phone memory cell respectively with the writing unit treating to send respectively, be used for data wireless with described buffer area and be sent to wireless transmit/receive units on the described video server; And the delete cells that is used for the data deletion that the described wireless transmit/receive units with described buffer area sent;
Described video server comprises: the server storage unit that is used to store audio, video data; Be used to receive and dispatch network communication unit from the information of the wireless transmit/receive units of described mobile phone and live client; The video data decoding that is used for the described mobile phone that described network communication unit receives is uploaded is the video decoding unit of YUV video data; Be used for the voice data that the described mobile phone that described network communication unit receives is uploaded is decoded as the audio decoding unit of audio frequency PCM formatted data; Be used for the audio frequency PCM of gained after video decoding unit and the audio decoding unit decoding and the buffer area that YUV video data is put into described server storage unit are given buffer memory respectively in order to stand-by data buffer unit; Be used for the audio, video data of data buffer area is carried out synchronous audio-visual synchronization unit according to its timestamp; Be used to handle the live request of the live client that described network communication unit receives, to determine the live Signaling Processing Unit of the needed audio/video information of live client and its audio/video coding form that is adopted; Be used for the corresponding YUV video data of buffer memory being carried out the server video encoding unit of corresponding encoded according to described live Signaling Processing Unit needed audio/video information of determined live client and audio/video coding form; Be used for the corresponding audio frequency PCM data of buffer memory being carried out the server audio coding unit of corresponding encoded according to described live Signaling Processing Unit needed audio/video information of determined live client and audio/video coding form; Be used for the audio, video data behind server video encoding unit and the server audio coding unit coding is transferred to the live data transmitting element that the network communication unit sends to live client.
2. mobile phone according to claim 1 is characterized in that towards the system that set-top box and PC carry out net cast described handset audio collecting unit is gathered the audio signal of 20ms at every turn, and the audio signal that will at every turn gather is disconnected stamps current timestamp; Described handset audio coding unit adopts AMR or mp3 coded format to encode.
3. mobile phone according to claim 1 carries out the system of net cast towards set-top box and PC, it is characterized in that, described mobile video collecting unit is gathered vision signal with the sample frequency in per second 12 to 30 width of cloth scopes, and the vision signal that will at every turn gather is stamped current timestamp; Described mobile video coding unit adopts MPEG2, MPE64 or H263 coded format to encode.
4. mobile phone according to claim 1 carries out the system of net cast towards set-top box and PC, it is characterized in that, described video server comprises that also one merges the stream unit, be used for the audio, video data behind server video encoding unit and the server audio coding unit coding is according to industrial standard generated the video file of standard, and deposit described server storage unit in for the non-live program request use of client.
5. mobile phone according to claim 1 is characterized in that towards the system that set-top box and PC carry out net cast the buffer area of described video server comprises the video cache subarea that is used for the buffer memory video data and is used for the audio frequency buffer memory subarea of buffered audio data.
6. mobile phone according to claim 1 carries out the system of net cast towards set-top box and PC, it is characterized in that, described live client comprises: live play device, set-top box and PC, wherein, live play device and network communication unit adopt http protocol or RTSP agreement to carry out communication, PC and network communication unit adopt http protocol to carry out communication, and set-top box and network communication unit adopt RTSP agreement or http protocol to carry out communication.
7. mobile phone according to claim 1 is characterized in that towards the system that set-top box and PC carry out net cast described wireless transmit/receive units adopts Transmission Control Protocol and described network communication unit to carry out communication.
8. a mobile phone is characterized in that comprising step towards the method for work that set-top box and PC carry out the system of net cast:
1) handset audio collecting unit and mobile video collecting unit are gathered voice data and video data respectively, and the data of being gathered are separately carried out time mark with current acquisition time;
2) mobile video coding unit and handset audio coding unit are separately encoded video data and voice data separately;
3) data of the writing unit of mobile phone after with described mobile video coding unit and each own coding of the handset audio coding unit buffer area that writes described mobile phone memory cell respectively sends respectively treating;
4) data wireless in the described buffer area of the wireless transmit/receive units of mobile phone is sent on the video server, the data deletion that the delete cells of mobile phone has sent the described wireless transmit/receive units in the described buffer area;
5) the network communication unit of video server receives from the voice data of the wireless transmit/receive units of described mobile phone and video data and live client and sends live request;
6) video decoding unit of video server and audio decoding unit separately described network communication unit is received video data decoding be that YUV video data, voice data are decoded as audio frequency PCM formatted data;
7) data buffer unit of video server gives buffer memory respectively in order to stand-by with the audio frequency PCM of video decoding unit and the back gained of audio decoding unit decoding and the buffer area that YUV video data is put into described server storage unit;
8) the audio-visual synchronization unit of video server carries out the audio, video data in the buffer area synchronously according to its timestamp;
9) the live Signaling Processing Unit of video server is handled the live request of the live client of described network communication unit reception, to determine the needed audio/video information of live client and its audio/video coding form that is adopted;
10) the server video encoding unit of video server and server audio coding unit be separately according to described live Signaling Processing Unit needed audio/video information of determined live client and audio/video coding form, the corresponding YUV video data of buffer memory carried out corresponding encoded and corresponding audio frequency PCM data are carried out corresponding encoded;
11) audio, video data of the live data transmitting element of video server after with server video encoding unit and server audio coding unit coding transferred to the network communication unit and sent to live client.
9. mobile phone according to claim 8 carries out the method for work of the system of net cast towards set-top box and PC, the audio, video data of the merging stream unit that it is characterized in that also comprising server after with video encoding unit and audio coding unit coding according to industrial standard generates the video file of standard, and deposits the step that described memory cell is used for the non-live program request of client in.
10. mobile phone according to claim 8 is characterized in that towards the method for work that set-top box and PC carry out the system of net cast: the server video encoding unit in the step 10) and each self energy of server audio coding unit are carried out multiplex coding simultaneously.
CN 201010225705 2010-07-13 2010-07-13 Video live broadcast system facing to set-top box and PC of mobile phone and working method thereof CN101945096B (en)

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