CN102263959B - Direct broadcast transfer method and system - Google Patents

Direct broadcast transfer method and system Download PDF

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CN102263959B
CN102263959B CN201110224837.0A CN201110224837A CN102263959B CN 102263959 B CN102263959 B CN 102263959B CN 201110224837 A CN201110224837 A CN 201110224837A CN 102263959 B CN102263959 B CN 102263959B
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stream
stream data
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CN102263959A (en
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胡仲刚
袁海
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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Abstract

The invention provides a direct broadcast transfer method and a direct broadcast transfer system which are used for fusing screens of a television, a computer and a mobile phone and relates to a streaming media encoding and decoding technology. The direct broadcast transfer method for fusing the screens of the television, the computer and the mobile phone comprises the following steps of: receiving direct broadcast stream data transmitted from a direct broadcast source; detecting an encoding format of the direct broadcast stream data; transcoding the direct broadcast stream data which is inconsistent with a preset target protocol in real time according to a detection result; and transmitting the direct broadcast stream data which accords with the target protocol to a corresponding target streaming media server. According to one aspect of the invention, by the direct broadcast transfer method, different direct broadcast sources which are generated by encoding or exist on a network can be subjected to protocol and format conversion in real time; therefore, play requirements of computers, set top boxes, mobile phones and other various terminals are met, and fusion and interaction of the screens of the television, the computer and the mobile phone are effectively supported.

Description

Direct broadcast transfer method and system
Technical field
The present invention relates to Streaming Media encoding and decoding technique, particularly relate to a kind of direct broadcast transfer method and system.
Background technology
It is a committed step during the integration of three networks advances that three screens (TV, computer, mobile phone) merge, and along with the startup that three nets (television network, broadband networks, telecommunications network) merge, three screen unifications, three screen interactions become Stream Media Application development trend.Live is the important component part of streaming media service.Live source can be the live stream that camera is taken, and can be also the Media Stream of having encoded existing on network.The former can be AV signal, and needing, through coding, could provide service by streaming media server; The latter, as long as streaming media server is supported this form, gets final product transfer, and service is provided.
Host-host protocol, coded system and the encapsulation format of the support of various flows media server are distinguishing.As QuickTime (a kind of streaming media server that the exploitation of American apple company provides), Darwin (Darwin's streaming media server) etc. support real time streaming transport protocol (RTSP), support Mpeg-4 (a kind of audio/video encoding standard of being formulated by dynamic image expert group), H.264 (joint video team by Video coding expert group and Motion Picture Expert Group amalgamated consolidation proposes a kind of digital video coding standard), H.263 (a kind of digital video coding standard being proposed by International Telecommunications Union), Advanced Audio Coding (AAC), the coded systems such as adaptive multi-rate (AMR), support MP4 (a kind of video file format), 3GP (a kind of video code model of 3G Streaming Media, a kind of simple version of MP4 form), the encapsulation format such as MOV (a kind of video format of American apple company exploitation).RealServer (a kind of streaming server of U.S. Real Networks company exploitation) supports RTSP agreement, support RealVideo (a kind of video coding algorithm of U.S. Real Networks company exploitation), RealAudio (a kind of audio coding algorithm of U.S. Real Networks company exploitation), H.264, the coded system such as Mpeg-4, AAC, AMR, support the encapsulation format such as RM (a kind of streaming media video file format of U.S. Real Networks company exploitation), rmvb (the changeable video file format of bit rate), 3GP, MP4.FlashMediaServer (a kind of server software of U.S. Adobe Systems company exploitation) supports real-time messages transportation protocol (RTMP) agreement, support VP6 (being a kind of video encoding standard that U.S. ON2 company proposes), H.264, the coded system such as AAC, support the encapsulation format such as 3GP, F4V (U.S. Adobe company releases after FLV form in order to meet the high definition epoch, supports stream media format H.264), Flash video.WindowsMediaServer (a kind of server software of MS's exploitation) supports RTSP, Microsoft Media Server agreement (MMS) agreement, support WMV (being a kind of video format that Microsoft releases), WMA (a kind of audio format that Microsoft releases) coded system, support senior stream format (ASF) encapsulation format.Equally, agreement and form that different terminals and player are supported are also different.The upper most of player of PC generally can compatible all agreement and form, and Set Top Box and the mobile phone terminal main file of supporting RTSP agreement and 3GP, MP4 form at present.
Streaming media server and terminal player General Requirements are supported RTSP and http protocol, support H.264, the coded system such as MPEG-4, AAC, AMR, support 3GP, MP4 formatted file.But on network, still having the live source of a lot of other forms and agreement, how these live source incoming stream media systems and service is provided, support various terminal plays requirements simultaneously, is to realize that three screens merge and three screen interactions problem in the urgent need to address.
Summary of the invention
The object of the invention is to propose a kind of direct broadcast transfer method and system for comprising that three screens of TV, computer and mobile phone merge, to support various terminal plays requirements.
For achieving the above object, the invention provides a kind of direct broadcast transfer method for comprising that three screens of TV, computer and mobile phone merge, comprising: receive the live TV stream data that live source sends; Detect the coded format of live TV stream data; According to testing result, the inconsistent live TV stream data of the target protocol with default are carried out to real-time transcoding; The live TV stream data-pushing that meets target protocol is arrived to corresponding object flow media server.
In one embodiment, live TV stream data comprise live TV stream (P3G) flow data, real-time messages transportation protocol (RTMP) flow data, real time streaming transport protocol (RTSP) flow data and/or senior stream format (ASF) flow data that encoder is released.
In one embodiment, to carrying out real-time transcoding with the inconsistent live TV stream data of object format according to default target protocol, comprise: to video format be not digital video coding standard for H.264 and/or audio format be not that the P3G flow data of Advanced Audio Coding (AAC) carries out transcoding.
In one embodiment, the RTMP flow data that receives live source transmission comprises: according to RTMP agreement, adopt the mode of circular treatment to carry out segmentation reception to RTMP flow data; Each data segment is carried out to separation, with acquisition time stamp and each frame data.
In one embodiment, default target protocol is RTSP and/or HTML (Hypertext Markup Language) (HTTP).
In one embodiment, direct broadcast transfer method also comprises: by dividing direct broadcast band, live TV stream data are carried out to channel manage, comprise and adding or deletion direct broadcast band; Configuration target protocol; Configuration and live source, and IP address and the port numbers of communicating by letter with object flow media server.
For achieving the above object, the present invention also provides a kind of direct broadcast transfer system for comprising that three screens of TV, computer and mobile phone merge, comprise: live TV stream receiving system, for receiving the live TV stream data of live source transmission, and detects the coded format of live TV stream data; Live TV stream transcoding device, carries out real-time transcoding for the inconsistent live TV stream data of the target protocol to default; Live TV stream pusher, for being pushed to the live data streams that meets target protocol corresponding object flow media server.
In one embodiment, live TV stream data comprise P3G flow data, RTMP flow data, RTSP flow data and/or ASF flow data.
In one embodiment, default target protocol is RTSP and/or HTTP.
In one embodiment, direct broadcast transfer system also comprises direct broadcast transfer management devices, comprising: channel manage module, for live TV stream data being carried out to channel manage by dividing direct broadcast band, comprise adding or deleting direct broadcast band; Information collocation module, for configuring target protocol, and configuration and live source, and IP address and the port numbers of communicating by letter with object flow media server; Monitoring module, for the running of direct broadcast transfer system is monitored, and sends the alarm signal to the running of direct broadcast transfer system exception.
Based on technique scheme, according to an aspect of the present invention, the different live source that exist on that direct broadcast transfer method can generate coding or network are carried out agreement and format conversion in real time, thereby support the broadcast request of the various terminals such as computer, Set Top Box and mobile phone, effectively support to comprise that three screen fusions and three screens of TV, computer and mobile phone are interactive.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further explanation of the present invention, forms a part of the present invention.Schematic description and description of the present invention is only for explaining the present invention, but do not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the schematic diagram of the application scenarios of the embodiment of the present invention.
Fig. 2 is according to the flow chart of the direct broadcast transfer method of the embodiment of the present invention.
Fig. 3 is according to the flow chart of the P3G live TV stream data processing method of the embodiment of the present invention.
Fig. 4 is according to the flow chart of the RTSP of the embodiment of the present invention and RTMP live TV stream data processing method.
Fig. 5 is according to the flow chart of the ASF live TV stream data processing method of the embodiment of the present invention.
Fig. 6 is the flow chart to RTSP server by live TV stream data-pushing according to the embodiment of the present invention.
Fig. 7 is according to the flow chart of the channel management method of the embodiment of the present invention.
Fig. 8 is according to the structural representation of the direct broadcast transfer system of the embodiment of the present invention.
Fig. 9 is the structural representation of direct broadcast transfer system according to another embodiment of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described in more detail, exemplary embodiment of the present invention is wherein described.In the accompanying drawings, identical label represents identical or similar assembly or element.
Fig. 1 is according to the schematic diagram of the application scenarios 100 of the embodiment of the present invention.Application scenarios 100 comprises live source 102, direct broadcast transfer system 104 and object flow media server 106.
Live source 102 can be from the Internet, mobile phone terminal or TV network, and form can be P3G, RTSP, RTMP or ASF etc.
Direct broadcast transfer system 104 can be carried out agreement, format conversion to the different live source of input.Because each Terminal Type generally all requires to support RTSP agreement and http protocol, in one embodiment, object flow media server 106 can be RTSP server or http server.
Fig. 2 is according to the flow chart of the direct broadcast transfer method 200 of the embodiment of the present invention.
In step 202, receive the live TV stream data that live source sends.
In step 204, detect the coded format of live TV stream data.
In step 206, according to testing result, the inconsistent live TV stream data of the target protocol with default are carried out to real-time transcoding.
In step 208, the live TV stream data-pushing that meets target protocol is arrived to corresponding object flow media server.
According to an aspect of the present invention, the different live source that exist on that direct broadcast transfer method can generate coding or network are carried out agreement and format conversion in real time, thereby support the broadcast request of the various terminals such as computer, Set Top Box and mobile phone, effectively support to comprise that three screen fusions and three screens of TV, computer and mobile phone are interactive.
Fig. 3 is according to the flow chart of the P3G live TV stream data processing method 300 of the embodiment of the present invention.
In step 302, according to monitoring, accept connection request, and to data analysis.Monitor related port, when having the encoder of live source to carry out TCP connection, accept request, and whether analysis is legal P3G live source.In one embodiment, monitoring can adopt the mode of circular treatment.
In step 304, receive P3G live TV stream data (as carried out data receiver by Accept function), and with newly-built form, the data that receive are put into data queue.
In step 306, P3G live TV stream data are carried out to separation (as by Receive event, data carried out to separation), isolate channel data, and whether check meets the head of P3G.If meet, enter step 308, otherwise, disconnect.
In step 308, to needing the P3G live TV stream data of transcoding to carry out transcoding.According to current configuration information, whether determine to P3G live TV stream transcoded data.In one embodiment, if H.264+AAC the audio frequency and video form of live source is not, need to carry out transcoding.Such as, the video format of input, for H.264, when audio format is AMR, is AAC form by audio pack real-time transcoding.If the form of live source is identical with object format, directly resolves and forward.
In step 310, after the parsing of audio frequency and video bag or transcoding complete, the live TV stream data-pushing that meets target protocol is arrived to corresponding object flow media server.
Fig. 4 is according to the flow chart of the RTSP of the embodiment of the present invention and RTMP live TV stream data processing method 400.
In step 402, receive RTSP and RTMP live TV stream data.
By reception resolution data, can identify coding and the encapsulation format of live TV stream data.For RTSP live TV stream data, can obtain the session description information (SDP) of data, the function SETUP order of being responsible for connecting by RTSP agreement connects.Then, the function Receve AData order by RTSP agreement reception data starts to receive data.When receiving data, can detect the data that receive.Detect current timestamp and whether meet predetermined condition.If meet, sound, video carried out synchronously, and obtain lock in time; Otherwise, enter step 404.
For RTMP live TV stream data, in one embodiment, function RTMP Connect and the live source that can be responsible for connecting by RTMP agreement connect, unsuccessful if connection is set up, and quit a program.If connected, be successfully established, send the order of RTMP data receiver, if response is received in the order of sending, start RTMP data receiver, otherwise, quit a program.In one embodiment, data receiver can adopt the mode of circular treatment, according to RTMP protocol segmentation, receives data, and this data segment can be voice data, video data, frame data or multiframe data etc.The every segment data receiving is carried out to separation, and acquisition time stabs and isolates each frame data.
In step 404, check in configuration file whether have RTSP or RTMP live source.
In step 406, when finding RTSP or RTMP live source, according to corresponding protocol analysis audio frequency and video bag, according to the data format receiving and object format, judge whether to need real-time transcoding or directly forward.
In step 408, the live TV stream data-pushing that meets target protocol is arrived to corresponding object flow media server.
Fig. 5 is according to the flow chart of the ASF live TV stream data processing method 500 of the embodiment of the present invention.
In step 502, receive ASF live TV stream data.
The high level flow encapsulation format of ASFShi Microsoft definition, can be used RTSP, MMS or http protocol transmission.Coded system can be used WMV, WMA, need carry out transcoding.
Check configuration file or receive when relevant backstage direct broadcast band increases order, can Direct Recognition ASF live source by MMS (Microsoft Media Server) Protocol.When receiving ASF source information, can start WMReader (assembly of Windows Media, for reading live TV stream data) interface and open the URL that this ASF live TV stream packet contains.This URL can be the address of local file, HTTP web page address, or MMS address.Data type is set to the state (as PLAYBACK) that can play.Check whether can open this URL, if can open, and while having sound, video data, obtain the ID of sound, video data, start to receive data.
In step 504, respectively Voice & Video bag is carried out to transcoding.
In step 506, the live TV stream data-pushing that meets target protocol is arrived to corresponding object flow media server.
In method 300-500 as in Figure 3-5, the function CGraphManger class that transcoding process can be processed by audio, video data transcoding realizes.Such as, network data (no matter being voice data or video data) is all pushed away past for realizing the interface (as INetPushSource interface) of the plug-in unit (as NetPushSource Filter) of transcoded data, and selector Filter in the middle of network data being distributed to by INetPushSource interface, and then data are encoded.After end-of-encode, data can be returned to application program.
In one embodiment, target protocol can be RTSP or HTTP, and object flow media server can be RTSP server or http server.Fig. 6 is the flow chart to RTSP server by live TV stream data-pushing according to the embodiment of the present invention.
In one embodiment, all data that are sent to RTSP server can be passed through the authentication of RTSP agreement, if can not be by waiting for next state.Otherwise, enter in the circulation of being controlled by the function ByteStreamNetSource class of being responsible for audio, video data processing and timestamp comparison.
In step 602, can be according to the time conditions of appointment successively reading video data and voice data in buffered data table.
In step 604, if video data and voice data all exist, contrast video data and voice data.
In step 606, if voice data early than video data more than the scheduled time, such as 500 milliseconds, or video data more than 500 milliseconds, allows its application program that enters RTSP server play early than voice data.
Otherwise, entering step 608, video or voice data can be waited for circulation next time.If in circulation is read, as long as video data and voice data have one not exist, send the request of secondary reading out data.
In one embodiment, when live TV stream data-pushing is during to http server, trigger HTTP data-pushing event.Open CONNECT and connect, if be connected unsuccessfully with http server, according to the Determines in source, whether re-establish connection.If successful connection, creates and send FLV file header, then send live TV stream data to http server.
Fig. 7 is according to the flow chart of the channel management method 700 of the embodiment of the present invention.
Direct broadcast transfer method can be supported the transfer of a plurality of channels simultaneously, and channel can pre-define, also can dynamic appending or deletion.The agreement that each channel is used, coded format also can be different, and the mode of obtaining data also can be different.
In step 702, all channels in channel configuration information can leave among a storehouse, can by the entrance of appointment, detect and scan.
In step 704, every the scheduled time, such as 1 minute, can run-down storehouse in all channels.
In step 706, if just find to exist channel unread to start its startup.
In step 708, every the scheduled time, such as 3 seconds, can check current channel whether exist stop, overtime, there is no data and the state such as send unsuccessfully, if exist, enter step 710, stop this channel.
Fig. 8 is according to the structural representation of the direct broadcast transfer system 800 of the embodiment of the present invention.Direct broadcast transfer system 800 comprises: live TV stream receiving system 802, live TV stream transcoding device 804 and live TV stream pusher 806.
Live TV stream receiving system 802, for receiving the live TV stream data of live source transmission, and detects the coded format of live TV stream data.
Live TV stream transcoding device 804, carries out real-time transcoding for the inconsistent live TV stream data of the target protocol to default.
Live TV stream pusher 806, for being pushed to the live data streams that meets target protocol corresponding object flow media server.
Fig. 9 is the structural representation of direct broadcast transfer system 900 according to another embodiment of the present invention.Direct broadcast transfer system 900 comprises: live TV stream receiving system 902, live TV stream transcoding device 904, live TV stream pusher 906 and direct broadcast transfer management devices 908.
Live TV stream receiving system 902, for receiving the live TV stream data of live source transmission, and detects the coded format of live TV stream data.In one embodiment, live TV stream data can comprise P3G flow data, RTMP flow data, RTSP flow data and/or ASF flow data etc.
Live TV stream transcoding device 904, carries out real-time transcoding for the inconsistent live TV stream data of the target protocol to default.For the different-format of the live TV stream data that receive, live TV stream transcoding device 904 can comprise P3G live TV stream data processing module, RTMP/RTSP live TV stream data processing module and/or ASF live TV stream data processing module and real-time transcoding module.
Live TV stream pusher 906, for being pushed to the live data streams that meets target protocol corresponding object flow media server.In one embodiment, default target protocol can be RTSP and/or HTTP.Be that live TV stream pusher 906 can comprise RTSP data-pushing module and/or HTTP data-pushing module, respectively by data-pushing to RTSP server and/or http server.
Direct broadcast transfer management devices 908 can comprise channel manage module, information collocation module and monitoring module.
Channel manage module, for carrying out channel manage by dividing direct broadcast band to live TV stream data, comprise adding or deleting direct broadcast band.
Information collocation module, for configuring target protocol, and configuration and live source, and IP address and the port numbers of communicating by letter with object flow media server.
Monitoring module, for the running of direct broadcast transfer system 900 is monitored, and sends the alarm signal to the 900 abnormal runnings of direct broadcast transfer system.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment with various modifications that the present invention's design is suitable for special-purpose.

Claims (10)

1. the direct broadcast transfer method for comprising that three screens of TV, computer and mobile phone merge, is characterized in that, comprising:
According to the host-host protocol of live TV stream data, connect with live source;
By described host-host protocol, receive the live TV stream data that live source sends;
Detect the coded format of described live TV stream data;
According to testing result, described coded format and default inconsistent live TV stream data of object format are carried out to real-time transcoding;
According to the time conditions of appointment, in buffered data table, read successively video data and the voice data in the live TV stream data after transcoding;
If video data and voice data all exist, contrast the timestamp of video data and voice data; If voice data is early than video data more than the scheduled time, by the live TV stream data-pushing that meets target protocol, to corresponding object flow media server, this object flow media server is RTSP server; Otherwise video data or voice data are waited for circulation next time;
If video data and voice data have one not exist, send the request of secondary reading out data.
2. direct broadcast transfer method according to claim 1, it is characterized in that, described live TV stream data comprise live TV stream P3G flow data, real-time messages transportation protocol RTMP flow data, real time streaming transport protocol RTSP flow data and/or the senior stream format ASF flow data that encoder is released.
3. direct broadcast transfer method according to claim 2, is characterized in that, to carrying out real-time transcoding with the inconsistent live TV stream data of object format according to default object format, comprises:
To video format be not digital video coding standard for H.264 and/or audio format be not that the P3G flow data of Advanced Audio Coding (AAC) carries out transcoding.
4. direct broadcast transfer method according to claim 2, is characterized in that, the described RTMP flow data that receives live source transmission comprises:
According to RTMP agreement, adopt the mode of circular treatment to carry out segmentation reception to RTMP flow data;
Each data segment is carried out to separation, with acquisition time stamp and each frame data.
5. direct broadcast transfer method according to claim 1, is characterized in that, described target protocol is RTSP and/or HTTP(Hypertext Transport Protocol).
6. direct broadcast transfer method according to claim 1, is characterized in that, also comprises:
By dividing direct broadcast band, described live TV stream data are carried out to channel manage, comprise and adding or deletion direct broadcast band;
Configure described target protocol;
Configuration and live source, and IP address and the port numbers of communicating by letter with object flow media server.
7. the direct broadcast transfer system for comprising that three screens of TV, computer and mobile phone merge, is characterized in that, comprising:
Live TV stream receiving system, for according to the host-host protocol of live TV stream data, connects with live source; By described host-host protocol, receive the live TV stream data that live source sends, and detect the coded format of described live TV stream data;
Live TV stream transcoding device, for carrying out real-time transcoding to described coded format and default inconsistent live TV stream data of object format;
Live TV stream pusher for according to the time conditions of appointment, reads video data and the voice data in live TV stream data successively in buffered data table; If video data and voice data all exist, contrast the timestamp of video data and voice data; If voice data is early than video data more than the scheduled time, by the live TV stream data-pushing that meets target protocol, to corresponding object flow media server, this object flow media server is RTSP server; Otherwise video data or voice data are waited for circulation next time; If video data and voice data have one not exist, send the request of secondary reading out data.
8. direct broadcast transfer system according to claim 7, is characterized in that, described live TV stream data comprise P3G flow data, RTMP flow data, RTSP flow data and/or ASF flow data.
9. direct broadcast transfer system according to claim 7, is characterized in that, described target protocol is RTSP and/or HTTP.
10. direct broadcast transfer system according to claim 7, is characterized in that, also comprises direct broadcast transfer management devices, comprising:
Channel manage module, for carrying out channel manage by dividing direct broadcast band to described live TV stream data, comprise adding or deleting direct broadcast band;
Information collocation module, for configuring described target protocol, and configuration and live source, and IP address and the port numbers of communicating by letter with object flow media server;
Monitoring module, for the running of described direct broadcast transfer system is monitored, and sends the alarm signal to described direct broadcast transfer system exception running.
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