CN102065269A - Method for carrying out video session, video session system and set top boxes (STBs) - Google Patents
Method for carrying out video session, video session system and set top boxes (STBs) Download PDFInfo
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Abstract
The invention provides a method for carrying out a video session, a video session system and set top boxes (STBs). The method comprises the following steps: a microprogrammed control unit (MCU) negotiates the capabilities of the STBs for the video session and keeps the IP address sets of the STBs for the video session and the correspondence between each IP address in the IP address sets and the video format of the corresponding STB; the STBs at the transmitting end acquire the video data from a camera and transmit the video data to the MCU; the MCU finds out the video format of the STB corresponding to the IP address of each STB at the transmitting end in the correspondence, converts the video data transmitted by the STBs at the transmitting end into the video coded formats corresponding to the found video formats of the STBs and then sends the video data to the corresponding STBs at the transmitting end; and the STBs at the transmitting end receive the video data and transmit the video data to a TV to be played after carrying out corresponding decoding on the video data. The cost of the video session can be lowered by adopting the scheme in the invention.
Description
Technical field
The present invention relates to the video media technology, relate in particular to method, video conferencing system and the set-top box of carrying out video conference.
Background technology
Referring to Fig. 1, system configuration schematic diagram for video conference in the prior art, this system comprises microprogram control unit (MCU, Microprogrammed Control Unit), and by Internet protocol (IP, Internet Protocol) network and MCU carry out signaling and the mutual terminal system of video data, and described terminal system comprises video camera, video conference terminal and display device.
The scheme of carrying out video conference comprises: at first, MCU holds consultation to each terminal system of video conference, obtains each the terminal system IP address that participates in video conference; Then, the video conference terminal of transmitting side terminal system obtains video data from video camera, sends MCU to; MCU sends to video data the video conference terminal of the other-end system that participates in video conference; Carry out decoding processing behind the video conference terminal receiving video data of each terminal system, send to display device and show.
Video conference inserts and to count numerously generally speaking, and each access point all needs to be provided with a locking terminal system, and this has increased the cost of video conference.
And for present hybrid fiber/ coax, HFC (HFC, Hybrid Fiber Coaxial) network, carried out the set-top box technique of duplex channel and half-duplex channel, and most of families all are provided with television set and set-top box, if can realize video conference based on television set and set-top box, then can reduce cost greatly.Yet, also do not have technology at present based on television set and set-top box realization video conference.
Summary of the invention
The invention provides a kind of method of carrying out video conference, this method can reduce the cost of video conference.
The invention provides a kind of video conferencing system, this system can reduce the cost of video conference.
The invention provides a kind of set-top box, this set-top box can reduce the cost of video conference.
A kind of method of carrying out video conference, this method comprises:
MCU carries out capability negotiation to each set-top box of video conference, preserves the IP address set of each set-top box of video conference, and preserves the corresponding relation between each IP address and respective set-top box video format in the IP address set;
The transmitting terminal set-top box is obtained video data from video camera, sends MCU to;
MCU finds out each receiving terminal set-top box IP address corresponding set-top box video format in described corresponding relation, after the video data that the transmitting terminal set-top box is transmitted is converted to the video code model corresponding with each set-top box video format that finds out, send video data to corresponding receiving terminal set-top box;
Receiving terminal set-top box receiving video data carries out sending television set to behind the corresponding decoding and plays.
A kind of video conferencing system, this system comprises set-top box, video camera, MCU and transcoder, described set-top box comprises transmitting terminal set-top box and receiving terminal set-top box;
Described transmitting terminal set-top box is used for obtaining video data from video camera, sends MCU to;
Described MCU is used for each set-top box of video conference is carried out capability negotiation, preserves the IP address set of each set-top box of video conference, and preserves the corresponding relation between each IP address and respective set-top box video format in the IP address set; Receive the video data that described transmitting terminal set-top box transmits, in described corresponding relation, find out each receiving terminal set-top box IP address corresponding set-top box video format, after video data is converted to the video code model corresponding with each set-top box video format that finds out, send video data to corresponding receiving terminal set-top box;
Described receiving terminal set-top box is used for receiving video data, carries out sending television set to behind the corresponding decoding and plays.
A kind of set-top box, this set-top box MC and MP;
Described MC is used for each set-top box of video conference is carried out capability negotiation, preserves the IP address set of each set-top box of video conference, and preserves the corresponding relation between each IP address and respective set-top box video format in the IP address set;
Described MP, be used for the video data that the receiving end/sending end set-top box transmits, in the described corresponding relation that described MC preserves, find out each receiving terminal set-top box IP address corresponding set-top box video format, after video data is converted to the video code model corresponding with each set-top box video format that finds out, send video data to corresponding receiving terminal set-top box.
From such scheme as can be seen, the present invention carries out capability negotiation by MCU to each set-top box of video conference, and by MCU the video data between each set-top box of video conference is transmitted, send the video data that receives to television set by each set-top box again and play; Thereby, realized carrying out video conference based on television set and set-top box, saved the cost of video conference.
Description of drawings
Fig. 1 is the structural representation of video conferencing system in the prior art;
Fig. 2 is the structural representation of video conferencing system of the present invention;
Fig. 3 carries out the method indicative flowchart of video conference for the present invention;
Fig. 4 carries out the method flow diagram example of video conference for the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
The present invention carries out capability negotiation by MCU to each set-top box of video conference, and assists to carry out transfer of data between each set-top box of video conference, behind each set-top box receiving video data of video conference, sends television set to and plays; Thereby, realized carrying out video conference based on television set and set-top box.
Referring to Fig. 2, be the system configuration schematic diagram of video conference of the present invention, this system comprises set-top box, video camera, MCU and transcoder, described set-top box comprises transmitting terminal set-top box and receiving terminal set-top box; Just carry out a certain set-top box of video conference, it is also receiving the video data that other set-top box send when other set-top box to video conference send video data; For other set-top box, local set-top box is a transmitting terminal, and for himself, local set-top box is a receiving terminal; Only show the transmitting-receiving situation of a set-top box among Fig. 2, the situation of two above set-top box is similar with it.
Described transmitting terminal set-top box is used for obtaining video data from video camera, sends MCU to;
Described MCU is used for each set-top box of video conference is carried out capability negotiation, preserves the IP address set of each set-top box of video conference, and preserves the corresponding relation between each IP address and respective set-top box video format in the IP address set; Receive the video data that described transmitting terminal set-top box transmits, in described corresponding relation, find out each receiving terminal set-top box IP address corresponding set-top box video format, after video data is converted to the video code model corresponding with each set-top box video format that finds out, send video data to corresponding receiving terminal set-top box;
Described receiving terminal set-top box is used for receiving video data, carries out sending television set to behind the corresponding decoding and plays.
The video data that the receiving terminal set-top box receives can be that MCU directly sends; Can also be to send transcoder to by MCU, again via IP quadrature amplitude modulation device (QAM, Quadrature Amplitude Modulation) sends the receiving terminal set-top box to, shown in dotted portion among Fig. 2, at this moment, described capability negotiation comprises transport stream (TS, Transport Stream) parameter negotiation, and described TS parameter comprises frequency; This system also comprises IPQAM and transcoder;
Described MCU also is used for sending each IP address of IP address set and the corresponding TS parameter that negotiates to IPQAM;
Described transcoder, be used to receive video data and corresponding receiving terminal set-top box IP address to the transmission of receiving terminal set-top box from MCU, video data is transcoded into IP-based TS, sends IP-based TS and corresponding receiving terminal set-top box IP address to described IPQAM;
Described IPQAM is used for forming TS according to the IP-based TS that receives, and TS is multiplexed on the frequency that negotiates, and the half-duplex channel by the receiving terminal set-top box sends corresponding receiving terminal set-top box to.
In existing set-top box technique, set-top box has the function that inserts IP network by the corresponding interface, and there are duplex channel and half-duplex channel in the set-top box, half-duplex channel is used for the video data of reception server side according to the traditional approach one-way transmission, and duplex channel can be used for carrying out two-way Signalling exchange and transfer of data with server side.When carrying out transfer of data, server side is given transcoder with the video Data Transmission that pushes, and carries out transcoding by transcoder and handles, and then send IPQAM to, after carrying out respective handling by IPQAM, on the frequency of appointment, the half-duplex channel of video data by set-top box is pushed to set-top box; If carry out video request program, not only need also to carry out Signalling exchange by set-top box duplex channel and server side by the moving video data of half-duplex channel reception server thruster.Based on existing set-top box technique, can pass through IP network, realize Signalling exchange and transfer of data between set-top box and the MCU; Can also realize Signalling exchange and transfer of data between MCU and the transcoder by IP network.
Transcoder is equivalent to the gateway between IP network and the hfc plant, by transcoder and IPQAM, just video data can be sent to the set-top box of hfc plant.
Described IPQAM and described transcoder place in the same equipment, perhaps, place independently in two equipment.
Alternatively, described MCU comprises multipoint controller (MC, Multi-point Controller) and multipoint processor (MP, Multi-point Processor);
Described MC is used for each set-top box of video conference is carried out capability negotiation, preserves the IP address set of each set-top box of video conference, and preserves the corresponding relation between each IP address and respective set-top box video format in the IP address set;
Described MP, be used to receive the video data that described transmitting terminal set-top box transmits, in the described corresponding relation that described MC preserves, find out each receiving terminal set-top box IP address corresponding set-top box video format, after video data is converted to the video code model corresponding with each set-top box video format that finds out, send video data to corresponding receiving terminal set-top box.
Alternatively, described capability negotiation comprises the TS parameter negotiation, and described TS parameter comprises frequency; Described MC also comprises TS parameter negotiation unit, is used for sending each IP address of IP address set and the corresponding TS parameter that negotiates to IPQAM.
MCU can be independent of the set-top box setting; MCU also can place in the set-top box, for example places in certain transmitting terminal set-top box.
The present invention also provides the method for carrying out video conference, and this method flow diagram may further comprise the steps as shown in Figure 3:
Carry out after the capability negotiation, each set-top box of video conference just can be carried out the reception and the transmission of video data.
In this step, MCU can directly send video data to corresponding receiving terminal set-top box, and particularly, MCU directly sends video data to the receiving terminal set-top box by the duplex channel of receiving terminal set-top box.
MCU can also send video data to corresponding receiving terminal set-top box by transcoder and IPQAM, and in this case, in the step 301, described capability negotiation comprises the TS parameter negotiation, and described TS parameter comprises frequency; And step 301 also comprises: MCU sends each IP address in the IP address set and the corresponding TS parameter that negotiates to IPQAM; Correspondingly, the described MCU of this step specifically comprises to corresponding receiving terminal set-top box transmission video data: MCU sends to transcoder with video data and corresponding receiving terminal set-top box IP address; Transcoder is transcoded into IP-based TS to the video data that receives, and IP-based TS and corresponding receiving terminal set-top box IP address are sent to IPQAM; IPQAM forms TS according to IP-based TS, and TS is multiplexed on the frequency that negotiates in the step 301, and the half-duplex channel by the receiving terminal set-top box sends the receiving terminal set-top box to.
The receiving terminal set-top box adopts local set-top box video format, and the video data that receives is decoded, and decoded video data is sent to television set play.
Below by Fig. 4 the method that the present invention carries out video conference is illustrated, in the present embodiment, MCU is independent of the set-top box setting, and MCU sends video data by transcoder and IPQAM to the receiving terminal set-top box, and this method may further comprise the steps:
Step 401, each set-top box of video conference is initiated conference call to MCU, sets up to call out to connect, and the capability set of self is provided.
Described capability set comprises video format that local set-top box is supported and TS parameter etc., the frequency when described TS parameter comprises local set-top box by the half-duplex channel receiving video data; Described video format comprises audio/video encoding standard (AVS, Audio and Video coding Standard) form, H.264 form, Motion Picture Experts Group (MPEG, Motion Picture Experts Group) 2 forms, MPEG4 form etc.Call out in the establishment of connection, MCU just can be known the IP address of each set-top box.
Step 402, MCU holds consultation to the ability of each set-top box of participation video conference, reaches the capability negotiation that the current video meeting can be used.
This step specifically comprises: video format and the TS parameter of MCU after each set-top box feedback is consulted; And MCU preserves the Internet protocol IP address set of each set-top box of video conference, and preserve each IP address in the IP address set and the respective set-top box video format that negotiates between corresponding relation.If the current video conference of carrying out has many groups, then MCU will preserve IP address set and the corresponding described corresponding relation of respectively organizing video conference respectively; Here for convenience of explanation, with current be that the situation of one group of video conference describes.
By step 401-402, can realize the capability negotiation of MCU to each set-top box of video conference.
Step 403, MCU sends each IP address in the IP address set and the corresponding TS parameter that negotiates to IPQAM.
Afterwards, just can carry out the transmission and the reception of video data between each set-top box of video conference.
Step 404, transmitting terminal set-top box start video camera records a video, and the video data in the local meeting-place that video camera will obtain is packaged into real time transport protocol (RTP, Real-time Transport Protocol) form, sends to the transmitting terminal set-top box.
In the present embodiment, the data of transmitting between postulated mechanism top box, MCU and the transcoder are the RTP form.
Step 405 is set up Media Stream between transmitting terminal set-top box and the MCU and is connected.
Step 406, the transmitting terminal set-top box sends video data to MCU via the duplex channel of local set-top box.
In the present embodiment, suppose to adopt H.323 agreement to carry out transfer of data, correspondingly, this step specifically comprises: the transmitting terminal set-top box is pressed H.323 consensus standard with video data, two-way Ethernet uplink port via local set-top box sends to MCU, sends to the IP address that comprises the transmitting terminal set-top box in the video data of MCU.
Step 407, MCU handles the video data that receives, and processed video data and corresponding receiving terminal set-top box IP address is sent to transcoder according to the ability of consulting before.
This step specifically comprises: address search goes out the corresponding IP address collection to MCU according to transmitting terminal IP, and the corresponding relation between each IP address and the respective set-top box video format in the IP address set; In this corresponding relation, find out each receiving terminal set-top box IP address corresponding set-top box video format, the video data that the transmitting terminal set-top box is transmitted is converted to and the corresponding video code model of each set-top box video format that finds out, and carry out processing such as protocol conversion, the mixing of many pictures, then, video data and corresponding receiving terminal set-top box IP address are sent to the transcoder of formulation.
Step 408, transcoder is transcoded into IP-based TS to the video data that receives, and IP-based TS and corresponding receiving terminal set-top box IP address are sent to IPQAM.
Step 409, IPQAM is according to the corresponding TS parameter that receives in the step 403, IP-based TS carried out processing such as multiplexing, modulation, forms TS, on the corresponding frequency that TS is negotiated before being multiplexed into, the half-duplex channel by the receiving terminal set-top box sends the receiving terminal set-top box to.
Step 410, the receiving terminal set-top box receives TS on the frequency that negotiates before, explain TS, and carry out video data decoding.
Step 411, set-top box output to decoded video data on the television set and play.
The present invention carries out the transmission of capability negotiation and video data by MCU to each set-top box of video conference, has realized carrying out video conference based on television set and set-top box, has saved the cost of video conference, and, video conference business is generalized among the domestic consumer.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. a method of carrying out video conference is characterized in that, this method comprises:
Microprogram control unit MCU carries out capability negotiation to each set-top box of video conference, preserves the Internet protocol IP address set of each set-top box of video conference, and preserves the corresponding relation between each IP address and respective set-top box video format in the IP address set;
The transmitting terminal set-top box is obtained video data from video camera, sends MCU to;
MCU finds out each receiving terminal set-top box IP address corresponding set-top box video format in described corresponding relation, after the video data that the transmitting terminal set-top box is transmitted is converted to the video code model corresponding with each set-top box video format that finds out, send video data to corresponding receiving terminal set-top box;
Receiving terminal set-top box receiving video data carries out sending television set to behind the corresponding decoding and plays.
2. the method for claim 1 is characterized in that, described capability negotiation comprises the transport stream TS parameter negotiation, and described TS parameter comprises frequency; This method also comprises: MCU sends each IP address in the IP address set and the corresponding TS parameter that negotiates to IP quadrature amplitude modulation device IPQAM;
Described MCU sends video data to corresponding receiving terminal set-top box and comprises:
MCU sends to transcoder with video data and corresponding receiving terminal set-top box IP address;
Transcoder is transcoded into IP-based TS to the video data that receives, and IP-based TS and corresponding receiving terminal set-top box IP address are sent to IPQAM;
IPQAM forms TS according to IP-based TS, and TS is multiplexed on the frequency that negotiates, and the half-duplex channel by the receiving terminal set-top box sends the receiving terminal set-top box to.
3. the method for claim 1 is characterized in that, described MCU sends video data to corresponding receiving terminal set-top box and comprises: MCU directly sends video data to the receiving terminal set-top box by the duplex channel of receiving terminal set-top box.
4. a video conferencing system is characterized in that, this system comprises set-top box, video camera, MCU and transcoder, and described set-top box comprises transmitting terminal set-top box and receiving terminal set-top box;
Described transmitting terminal set-top box is used for obtaining video data from video camera, sends MCU to;
Described MCU is used for each set-top box of video conference is carried out capability negotiation, preserves the IP address set of each set-top box of video conference, and preserves the corresponding relation between each IP address and respective set-top box video format in the IP address set; Receive the video data that described transmitting terminal set-top box transmits, in described corresponding relation, find out each receiving terminal set-top box IP address corresponding set-top box video format, after video data is converted to the video code model corresponding with each set-top box video format that finds out, send video data to corresponding receiving terminal set-top box;
Described receiving terminal set-top box is used for receiving video data, carries out sending television set to behind the corresponding decoding and plays.
5. system as claimed in claim 4 is characterized in that described capability negotiation comprises the TS parameter negotiation, and described TS parameter comprises frequency; This system also comprises IPQAM and transcoder;
Described MCU also is used for sending each IP address of IP address set and the corresponding TS parameter that negotiates to IPQAM;
Described transcoder, be used to receive video data and corresponding receiving terminal set-top box IP address to the transmission of receiving terminal set-top box from MCU, video data is transcoded into IP-based TS, sends IP-based TS and corresponding receiving terminal set-top box IP address to described IPQAM;
Described IPQAM is used for forming TS according to the IP-based TS that receives, and TS is multiplexed on the frequency that negotiates, and the half-duplex channel by the receiving terminal set-top box sends corresponding receiving terminal set-top box to.
6. system as claimed in claim 5 is characterized in that, described IPQAM and described transcoder place in the same equipment, perhaps, places independently in two equipment.
7. system as claimed in claim 4 is characterized in that, described MCU comprises multipoint controller MC and multipoint processor MP;
Described MC is used for each set-top box of video conference is carried out capability negotiation, preserves the IP address set of each set-top box of video conference, and preserves the corresponding relation between each IP address and respective set-top box video format in the IP address set;
Described MP, be used to receive the video data that described transmitting terminal set-top box transmits, in the described corresponding relation that described MC preserves, find out each receiving terminal set-top box IP address corresponding set-top box video format, after video data is converted to the video code model corresponding with each set-top box video format that finds out, send video data to corresponding receiving terminal set-top box.
8. system as claimed in claim 4 is characterized in that described MCU places in the set-top box; Perhaps, be independent of the set-top box setting.
9. a set-top box is characterized in that, this set-top box comprises MC and MP;
Described MC is used for each set-top box of video conference is carried out capability negotiation, preserves the IP address set of each set-top box of video conference, and preserves the corresponding relation between each IP address and respective set-top box video format in the IP address set;
Described MP, be used for the video data that the receiving end/sending end set-top box transmits, in the described corresponding relation that described MC preserves, find out each receiving terminal set-top box IP address corresponding set-top box video format, after video data is converted to the video code model corresponding with each set-top box video format that finds out, send video data to corresponding receiving terminal set-top box.
10. set-top box as claimed in claim 9 is characterized in that described capability negotiation comprises the TS parameter negotiation, and described TS parameter comprises frequency; Described MC also comprises TS parameter negotiation unit, is used for sending each IP address of IP address set and the corresponding TS parameter that negotiates to IPQAM.
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Application publication date: 20110518 |