CN101326826A - Method, system and apparatus for controlling service of network TV - Google Patents
Method, system and apparatus for controlling service of network TV Download PDFInfo
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Abstract
The IPTV, especially a method, system and apparatus of IPTV service controlling are provided, for resolving the problem that the user terminal cannot obtain the information of the designated channel in the prior art. In the method, system and apparatus, the terminal side transfers the channel identification information of user designated channel to the network side, designates the channel of request; the network side returns the channel information corresponding to the channel identification information of user designated channel. The terminal side may obtain the designated channel information by using the technical proposals above, and reduce the required storage space of the terminal side for storing the channel information.
Description
Service control method, system and the device of Web TV
Technical field
The present invention relates to IPTV technical fields, more particularly to a kind of service control method of Web TV, system and device.Background of invention
Internet protocol TV (IPTV, Internet Protocol Television), or also known as Web TV, the structural representation of its system can be as shown in Figure 1.The system includes user terminal and network side, and network side includes Dialog processing module and application processing module, wherein：
Dialog processing module is used to provide the functions such as Call- Control1, routing keeping for the user terminal of access network, and it can both route the call to called user terminal, can also route the call to application processing module；
Application processing module is used for the request for handling user.
E1 shown in Fig. 1 is user terminal and the interface of Dialog processing module, and E2 is the interface of Dialog processing module and application processing module.
At present, when realizing IPTV service, user is using needing to obtain the relevant information of channel, i.e. channel information before IPTV service.Channel information potentially includes the information such as channel multicast address, port, channel encryption key.User, which obtains, can just add corresponding multicast group after channel information, carry out the reception of different channel program.Certainly, actually then can be by user's self-defining, as long as user terminal can watch program according to channel information including which specific information as channel information.
In the prior art, when the IPTV softwares of user terminal start, user terminal can use HTTP automatically（HTTP, Hypertext Transfer Protocol) or FTP（FTP, File Transfer Protocol) from the text of specified address acquisition channel information.The corresponding channel information of whole channel ID informations specifically can be disposably obtained, or is divided many
It is secondary to obtain whole corresponding channel informations of channel ID information, asked channel is not explicitly pointed out in the request of terminal, but the script file name of the filename comprising description information or processing request is specified, such as：
http://iptv.example.com/ch/ch-des.txt
Represent that accessing specified channel list describes to provide channel information in file, this document.Or
http://epg.example.com/epg/jsp/getChannelList.jsp?lang=en
Represent to access and specify after script, its information returned is exactly channel information.
The channel information coding and form obtained using the above method is typically defined by the developer of development and application, belongs to privately owned definition；The channel information obtained in this way is parsed by terminal software in end side and relevant information is stored in into end side, user can carry out channel selection by terminal interface, and terminal then automatically initiates multicast according to the information obtained according to the selection situation of user and adds request.
4 is blunt obvious, during using the above method, if user only selects several channels to watch every time after starting up of terminal, then disposably issue the demand that all channel informations propose memory space for terminal, this for the memory spaces such as mobile phone compared with d, terminal for be a kind of obvious wasting of resources.Therefore, the channel that user terminal only obtains that user specifies is very significant.The content of the invention
The embodiment of the present invention provides a kind of service control method of Web TV, to solve the presence of the problem of user terminal can not obtain specified channel information in the prior art.
For above-mentioned purpose, the technical scheme that the embodiment of the present invention is proposed is：
A kind of service control method of Web TV, comprises the following steps：
The lateral network side of terminal sends the channel ID information of user's specified channel, and receives channel information corresponding to the network side return identification information.
The embodiment of the present invention also proposes a kind of method that television services are provided in SIP network, Ke Yi
Television channel is identified in SIP network, so as to provide television services.
For above-mentioned purpose, the technical scheme that the embodiment of the present invention is proposed is：
A kind of method that television services are provided in SIP network, this method includes：
Web TV application server receives the SIP session requests initiated by network television terminal function, and the SIP URI for indicating channel ID information are included in the SIP session requests;
Web TV application server parses the SIP URI to obtain the channel ID information, and the television channel for determining to play to network television terminal function according to the channel information.
The embodiment of the present invention also proposes the method that television services are provided in another SIP network, television channel can be identified in SIP network, so as to provide television services.
For above-mentioned purpose, the technical scheme that the embodiment of the present invention is proposed is：
A kind of method that television services are provided in SIP network, this method includes：
Television channel identification server receives the SIP URI inquiry requests for including TV URI from end side, television channel identification server is according to TV URI and SIP URI corresponding relation, SIP URI corresponding to TV URI are sent to end side, wherein including channel ID information in the SIP URI；
Web TV application server receives the SIP session requests initiated by end side, and the SIP URI are included in the SIP session requests;
Web TV application server parses the SIP URI to obtain the channel ID information, and determines channel information according to the channel ID information.
The embodiment of the present invention also proposes the method that television services are provided in another SIP network, television channel can be identified in SIP network, so as to provide television services.
For above-mentioned purpose, the technical scheme that the embodiment of the present invention is proposed is：
A kind of method that television services are provided in SIP network, this method includes：
Core IMS receive the SIP session requests sent by end side, and TV URI are included in the SIP session requests;Core IMS are identified to television channel according to the TV URI being resolved to and serviced
Device sends SIP URI inquiry requests；
SIP URI corresponding to TV URI are sent to Core IMS by television channel identification server according to TV URI and SIP URI corresponding relation, and channel ID information is included in the SIP URI；
The SIP session requests are routed to Web TV application server by Core IMS according to the SIP URI received, Web TV application server parses the SIP URI to obtain the channel ID information, and the channel information for determining to send to end side according to the channel ID information.
The embodiment of the present invention also provides a kind of network television system, to solve the presence of the problem of user terminal can not obtain specified channel information in the prior art.
For above-mentioned purpose, the technical scheme that the present embodiment is proposed is：
A kind of network television system, including end side and network side,
The end side includes sending the module of the channel ID information of user's specified channel to network side；
The network side includes returning to the module of channel information corresponding to the identification information to end side.
The embodiment of the present invention also proposes a kind of system that television services are provided in session initiation protocol SIP network, television channel can be identified in SIP network, so as to provide television services.
For above-mentioned purpose, the technical scheme of the embodiment of the present invention is：
A kind of system that television services are provided in session initiation protocol SIP network, including：Network television terminal function, for initiating SIP session requests to Web TV application server, includes the SIP universal resource indicators URI for indicating channel information in the SIP session requests;Web TV application server, for parsing the SIP URI to obtain the channel information, and the television channel for determining to play to network television terminal function according to the channel information.
The embodiment of the present invention also proposes a kind of network television terminal function, and television channel can be identified in SIP network, so as to realize the television services of offer.
For above-mentioned purpose, the scheme that the present embodiment is proposed is：
A kind of network television terminal function, including SIP session requests initiate unit and TV information shows unit, wherein：
SIP session requests initiate unit, and for initiating SIP session requests to Web TV application server, the SIP URI for indicating channel information are included in the SIP session requests;
TV information shows unit, for receiving the television channel information determined by Web TV application server according to the channel information, and shows the television channel information.
The embodiment of the present invention also proposes a kind of network television terminal function, and television channel can be identified in SIP network, so as to realize the television services of offer.
For above-mentioned purpose, the scheme that the present embodiment is proposed is：
A kind of network television terminal function, including SIP session requests initiate unit and TV information shows unit, wherein：
SIP session requests initiate unit, for sending the SIP URI inquiry requests for including TV URI to television channel identification server, receive the SIP URI corresponding to the TV URI returned by television channel identification server, and the SIP session requests for initiating to include SIP URI to Web TV application server, channel information is included in the SIP URI；
TV information shows unit, for receiving the television channel information determined by Web TV application server according to the channel information, and shows the television channel information.
The embodiment of the present invention also provides a kind of Web TV application server, channel ID information that can be in SIP network, so as to realize the television services of offer.
For above-mentioned purpose, the scheme that the present embodiment is proposed is：
A kind of Web TV application server, including channel information acquiring unit and TV information provide unit, wherein：
Channel information acquiring unit, for receiving SIP session requests, and parses the SIP URI to obtain the channel information, wherein including instruction channel information in SIP session requests described
SIP URI;
TV information provides unit, for the television channel for determining to play to network television terminal function according to the channel information, and sends the television channel information to the network television terminal function.
The embodiment of the present invention also proposes a kind of television channel identification server, and its technical scheme is：A kind of television channel identification server, including corresponding relation storage unit and SIP URI query units, wherein
Corresponding relation storage unit, preserves TV URI and SIP URI corresponding relation；SIP URI query units, for receiving network television terminal function or the SIP URI inquiry requests comprising TV URI transmitted by Core IMS, and according to TV URI and SIP URI corresponding relation, the SIP URI corresponding to the TV URI are sent to the network television terminal function or Core IMS.
The embodiment of the present invention also proposes a kind of Core IMS, including TV URI resolution units and routing unit, wherein
TV URI resolution units, TV URI SIP session requests are included for being received from network television terminal function, TV URI are parsed from the SIP session requests, and send SIP URI inquiry requests to television channel identification server；
Routing unit, for the SIP session requests to be routed into Web TV application server, wherein including the SIP URL returned by television channel identification server in response to the SIP URI inquiry requests in the SIP session requests
The embodiment of the present invention also proposes a kind of terminal, including for receiving the command reception module of user operation instruction, the terminal also includes the module for sending the channel ID information of the command reception module specified channel.
In embodiments of the present invention, the lateral network side of terminal sends the channel ID information of user's specified channel, specifies asked channel；The lateral end side of network returns to the corresponding channel information of channel ID information of user's specified channel.Using technical solution of the present invention, end side can obtain it and specify
Channel channel information, the channel for alloing user and being specified according to its needs its needs to obtain；And, need to obtain all channel informations of network side relative to end side in the prior art, it is apparent that using technical solution of the present invention saved end side storage channel information needed for memory space, this for the memory spaces such as mobile phone compared with ' ", terminal for be very significant.
In addition, comprising the SIP URI for indicating channel information in the SIP session requests that network television terminal function is sent to Core IMS;Core IMS send SIP URI inquiry requests according to the TV URI being resolved to television channel identification server, and television channel identification server can determine television channel according to channel information.It can be seen that, channel identication of the invention is based on SIP URI mechanism, channel information is carried in SIP URI, therefore, it is possible to uniquely identify television channel in SIP network, it is possible to achieve provide television services in SIP network.Brief Description Of Drawings
Fig. 1 is IPTV system block diagram of the prior art；
Fig. 2 is the flow chart for obtaining channel information from application processing module according to user terminal in present pre-ferred embodiments；
Fig. 3 is the method flow schematic diagram of offer television services in the SIP network according to the embodiment of the present invention；
Fig. 4 be according to request viewing in the SIP network of the embodiment of the present invention it is default live or when mobile television channel schematic flow sheet；
Fig. 5 is the schematic flow sheet of the specific channel of request viewing in the SIP network according to the embodiment of the present invention；
Fig. 6 is the schematic flow sheet of the specific channel group of request viewing in the SIP network according to the embodiment of the present invention；
Fig. 7 is the IPTV system block diagram in the embodiment of the present invention；
Fig. 8 is that the system architecture of offer television services in the SIP network according to the embodiment of the present invention is shown
It is intended to；
Fig. 9 is the system structure diagram of offer television services in the SIP network according to present pre-ferred embodiments；
Figure 10 is the network TV terminal structural representation according to the embodiment of the present invention；
Figure 11 is the Web TV application server structural representation according to the embodiment of the present invention；Figure 12 is the television channel identification server structural representation according to the embodiment of the present invention；Figure 13 is the Core IMS structural representations according to the embodiment of the present invention.Implement the mode of the present invention
The present invention core concept be：The lateral network side of terminal sends the channel ID information of user's specified channel；The lateral end side of network returns to the corresponding channel information of channel ID information of user's specified channel.
The present invention is further described with reference to the accompanying drawings and examples.
In the present embodiment, the interface E1 and Dialog processing module and application processing module of user terminal and Dialog processing module interface E2 can be Session initiation Protocols（SIP, Session Initial Protocol), HTTP transmits stream media protocol in real time（RTSP, Real-Time Streaming Protocol) interface.
In order to realize IPTV service, user terminal needs to obtain necessary channel information from application processing module.In one embodiment of the invention, user terminal obtains the flow of channel information as shown in Fig. 2 comprising the following steps from application processing module：
Step S101, user terminal sends the channel ID information of specified channel to Dialog processing module.
Here, the numbering or other information corresponding to channel identication or the channel identication of determination that channel ID information can be to determine.Such as：CCTV1 is a channel identication, and 111 be the corresponding numbering of this channel identication, then, the channel ID information in step S101 both may be used
Think CCTV1, can also be 111.
Step S102, Dialog processing module route or forwards the channel ID information to application processing module.
Step S103, application processing module is received after the channel ID information, obtains its corresponding channel information according to the channel ID information, and return to channel ID information and its corresponding channel information to Dialog processing module；
Step S104, Dialog processing module route or forwarded channel ID information and its corresponding channel information to user terminal.
In above-mentioned flow, user terminal can obtain the channel information of specified channel in initiating business request by above-mentioned flow.That is, it is possible to use business request information carries the channel ID information of specified channel, channel ID information and its corresponding channel information are carried using service request response message.
Business request information can carry one or more channel ID informations.In the case where business request information carries a channel ID information, the service request response message that application processing module is returned can not include the channel ID information, and only include the corresponding channel information of the channel ID information.So, user terminal can specify the channel information that the channel information is channel specified by user terminal after the channel information is received.And in the case of multiple channel ID informations are carried in business request information, one or more groups of channel ID informations and channel information can be carried in service request response message, and so as to support such as picture-in-picture, the realization that many pictures are played etc..
Channel information can be carried returns to user terminal in service request response message, such as carries in existing Session Description Protocol（SDP, Session Description Protocol) in.And channel information is returned during this in user terminal requests channel information, network；Or, further, if user needs to carry out channel switch, during user terminal requests channel switch, it may all need to carry channel ID information in business request information and service request response message.
Method one, extends SDP attribute, defines a new SDP property column, and carry channel ID information by the SDP property columns of the new definition.
When the interface E1 and Dialog processing module and application processing module of user terminal and Dialog processing module interface E2 use SIP, RTSP, when HTTP etc. can carry SDP agreement, channel ID information can be carried by the SDP property columns newly defined.
In an example of the present embodiment, a new SDP property column is defined using following language：
a=chid:Channel ID information
In a specific service request response message, carry channel ID information using the new SDP property columns and carry channel information and other information in other property columns simultaneously, describing mode A is as follows：
v=0
o=ue 2890844730 2890844732 IN IP4 client.example.com
c=IN IP4 client.example.com
m=audio 65421 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=chid:TVl
m=video 65113 RTP/AVP 31
a=rtpmap:31 MPV/90000
a=chid:TVl
The media audio that the above-mentioned row of language the 6th is described by specified channel attribute to the 4th, 5 rows is limited, the media video that 9th row is described by specified channel attribute to the 7th, 8 rows is limited, represent as the 4th row, the 5th row media audio it is related to TV1, the 7th row, eighth row media video it is also related to TV1 channels.4th row, the 5th row, the 7th row, eighth row described here etc. just may be considered the channel information of network side return.Certainly, channel information can also be carried using describing mode A in business request information, does not simply carry channel information.
Service request response message can also be specific as follows using describing mode B：
ν=0
o=ue 2890844730 2890844732 IN IP4 client.example.com
c=IN IP4 client.example.com
a=chid:TVl
m=audio 65421 RTP/AVP 0
a=rtpmap:0 PCMU/8000
m=video 65113 RTP/AVP 31
a=rtpmap:31 MPV/90000
The above-mentioned row of language the 4th represents that 5 rows ~ eighth row property column is related to TV1 channels by specifying session level channel attribute to be limited the Voice ＆ Video of media.Equally, 5 rows ~ eighth row described here etc. is it is also assumed that be the channel information that network side is returned.Certainly, channel information can also be carried using describing mode B in business request information, does not simply carry channel information.
Realizing IPTV class business, such as LiveTV, the business such as TsTV when, terminal is in SIP, RTSP, and SDP of the carrying package containing the attribute extension is identified to asked channel in the business request information of agreement such as HTTP；The application processing module channel that SDP of the same carrying package containing the attribute extension is asked terminal in service request response message is identified, simultaneously, also the corresponding channel information of channel ID information is been described by by SDP, so as to completely be described to a channel by the channel information of channel ID information combination SDP media descriptions.
Because SDP can be carried in SIP, RTSP, in the agreement such as HTTP, therefore method one is not limited to a certain specific protocol and used.
Due in a session, SDP property column can only increase or change, when therefore carrying out the carrying of channel ID information using method one, if user requires to carry out channel switch during a certain channel is watched, a business request information then can be sent to application processing module, and application processing module is notified by increasing or changing the SDP carried in the service request, channel switch is realized, two kinds of modes for realizing channel switch are described below：
Mode one, user terminal add the channel ID information property column of target channel to indicate target channel in the SDP that business request information is carried, and indicate that the channel being switched is closed in SDP, indicate that it is closed as set the corresponding SDP media receivers port of channel being switched for 0；
Application processing module increases the channel information that SDP property columns describe target channel newly in the SDP that the corresponding service request response message of the business request information is carried.
By taking above-mentioned describing mode A as an example, when channel is switched to TV2 by user from TV1, user terminal is sent to being described in detail below for the SDP of application processing module：
ν=0
o=ue 2890844730 2890844732 IN IP4 client.example.com
c=IN IP4 client.example.com
m=audio 0 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=chid:TVl
m=video 0 RTP/AVP 31
a=rtpmap:31 MPV/90000
a=chid:TVl
m=audio 40001 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=chid:TV2
m=video 40005 RTP/AVP 31
a=rtpmap:31 MPV/90000
a=chid:TV2
The SDP that application processing module returns to user terminal is as follows：
ν=0
o=ue 2890844730 2890844732 IN IP4 client.example.com
m=audio O RTP/AVP 0
c=IN IP4 TV 1.example.com
a=rtpmap:0 PCMU/8000
a=chid:TVl
m=video O RTP/AVP 31
c=IN IP4 TV 1.example.com
a=rtpmap:31 MPV/90000
a=chid:TVl
m=audio 65425 RTP/AVP 0
c=IN IP4 TV2.example.com
a=rtpmap:0 PCMU/8000
a=chid:TV2
m=video 65115 RTP/AVP 31
c=IN IP4 TV2.example.com
a=rtpmap:31 MPV/90000
a=chid:TV2
In the case where employing mode one realizes channel switch, it there may be the situation that user needs the target channel switched to be described in sdp, for example, after channel is switched into TV2 from TV1, channel is switched back into TV1 from TV2 again, then above-mentioned SDP directly can be revised as by user terminal：
v=0
o=ue 2890844730 2890844732 IN IP4 client.example.com
c=IN IP4 client.example.com
m=audio 65421 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=chid:TVl
m=video 65113 RTP/AVP 31
a=rtpmap:31 MPV/90000
a=chid:TVl
m=audio O RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=chid:TV2
m=video 0 RTP/AVP 31
a=rtpmap:31 MPV/90000
a=chid:TV2
And the SDP is sent to application processing module, then application processing module can send TV1 content to user terminal according to the description of the SDP and stop sending TV2 content, realize the switching of channel.
Mode two, user terminal indicate the modification of channel by changing existing channel ID information property column in the SDP that business request information is carried, such as can be in business request information by existing a=chid:TV 1 is revised as a=chid:TV 2 wishes to be switched to TV2 from TV1 to indicate, application processing module changes the corresponding channel information property column of channel ID information property column to indicate the channel information of target channel in the SDP that service request response message is carried, and TV 1 channel information is such as revised as to TV2 channel information.
Still by taking above-mentioned describing mode A as an example, when channel is switched to TV2 by user from TV1, it is described in detail below：
v=0
o=ue 2890844730 2890844732 IN IP4 client.example.com
c=IN IP4 client.example.com
m=audio 65421 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=chid:TV2
m=video 65113 RTP/AVP 31
a=rtpmap:31 MPV/90000
a=chid:TV2
In the case where employing mode two realizes channel switch, it also likely to be present the situation that user needs the target channel switched to be described in sdp, for example, user terminal is in first time request channel ID information, request TV1 and TV2 channel ID information, TV2 is closed afterwards, i.e., then only remaining TV1 carries out TV1 to TV2 switching again.Now, user terminal only needs to according to circumstances change SDP and is sent to application processing module, then application processing module can send TV2 content to user terminal according to the description of the SDP and stop sending TV1 content, realize the switching of channel.
When receiving the program of multiple channels at the same time, if the user desired that closing specified channel, then terminal can such as be set the corresponding SDP media receivers port of specified channel for 0 to indicate that it is closed by indicating that specified channel is closed in the SDP that business request information is carried.Application processing module stops sending the content of specified channel to user terminal, so as to realize the closing of specified channel after the business request information is received.
Method two, defines new SIP head domain, and carry channel ID information by the SIP head domain of the new definition；
When the interface E1 and Dialog processing module and application processing module of user terminal and Dialog processing module interface E2 are realized using Session Initiation Protocol, new SIP head domain can be defined, and channel ID information is carried by the SIP head domain of the new definition.
In an example of the present embodiment, SIP head domain is newly defined as follows using BNF grammers：
Channel = "Channel" HCOLON l*(chld) *(SEMI chid_parm)
chid = ["chid" EQUAL] ch-value
ch-value = token I quoted-string
chid_parm = generic-param
IPTV class business is being realized, during such as LiveTV, TsTV business, terminal is identified by carrying the header field in the business request information using Session Initiation Protocol to asked channel；Equally carry in the header field, and the service request response message and channel information is been described by while carrying SDP in SIP in the service request response message of application processing module also, both combine and a channel is completely described.
When specifically carrying channel ID information using the SIP header fields of the new definition in business request information and service request response message, following form can be used：
Channel: chld=cctvl
Or
Channel: cctvl
Or
Channel: "cctvl"
Above-mentioned various forms may be used to indicate that business request information or service request response message are related to channel cctvl.
In service request response message, the SDP that the SIP head domain newly defined in method two can be with attribute extension in method one is used cooperatively, SDP that can also be with non-expanding, i.e., before the SDP without extended attribute row use cooperatively, wherein：
When the SIP head domain newly defined in method two and the SDP of non-expanding are used cooperatively, user terminal all regard the total medium description content included by the SDP of the non-expanding as the related media description content of the channel indicated by the SIP head domain after the service request response message is received；
When the SDP of attribute extension in the SIP head domain and method one newly defined in method two is used cooperatively, user terminal is after the service request response message is received, by included by SIP head domain
Channel ID information and the media description content included by SDP are matched, the channel information corresponding to extended attribute row then matched in SDP with the channel ID information included by SIP header fields is the channel information specified, and other description informations can exist independently of channel information.In this case, when user terminal needs to carry out channel switch, it can not indicate that the channel being switched is closed in sdp, it is only necessary to which making does not include the identification information for the channel or pent channel being switched in SIP head domain.That is, if end side needs channel switch, business request information is sent to the channel ID information that the SIP head domain newly extended in network side, business request information does not include being switched channel by end side；Network side is matched the SDP property columns of the new definition in the message received with the parameter newly extended in the SIP head domain or SIP head domain of the new extension, the channel ID information for the switching target channel that the channel ID information matched is specified as user.
The channel ID information carried using in SIP head domain is TV2, and being described as follows in the SDP that SIP is carried illustrates：
v=0
o=ue 2890844730 2890844732 IN IP4 client.example.com
c=IN IP4 client.example.com
m=audio 65422 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=chid:TVl
m=video 65113 RTP/AVP 31
a=rtpmap:32 MPV/90000
a=chid:TVl
m=audio 65425 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=chid:TV2
m=video 65115 RTP/AVP 31
a=rtpmap:31 MPV/90000
a=chid:TV2
Now, the media description content according to included by the channel ID information TV2 and SDP that are carried in SIP head domain is matched, then understands that the description information that TV2 is specified is：
m=audio 65425 RTP/AVP 0
a=rtpmap:0 PCMU/8000
m=video 65115 RTP/AVP 31
a=rtpmap:31 MPV/90000
Method three, channel ID information is carried by extending the parameter in SIP head domain；When the interface E1 and Dialog processing module and application processing module of user terminal and Dialog processing module interface E2 are realized using Session Initiation Protocol, channel ID information can be carried by extending the parameter in SIP head domain.
In an example of the present embodiment, extend the general parameter generic-param in the Accept-Contact header fields of Session Initiation Protocol to carry out channel ID information.
To under the existing BNF syntactic definitions mouthful of generic-param parameters：
generic-param = token [ EQUAL gen-value ]
gen-value = token I host I quoted-string
In this example, according to generic-param parameter grammers, the definition of channel ID information is increased in generic-param parameters, channel ID information can be as follows using form：
chId=TV 1 , chId=TV2, ... , chId=TVn
Or
chld= "TV1", chld= "TV2", ... , chld= "TVn"
Or
TV1, TV2, ... , TVn
Or
"TV1", "TV2", ... , "TVn"
IPTV class business is being realized, during such as LiveTV, TsTV business, terminal is identified by carrying the general parameter generic- param in Accept-Contact header fields in the business request information using Session Initiation Protocol to asked channel；The general parameter generic-param in the Accept-Contact header fields is equally carried in the service request response message of application processing module, and also carry SDP in SIP simultaneously in the service request response message to be been described by channel information, both combine and completely describe a channel.
Accept-Contact is specifically being utilized in business request information and service request response message
When general parameter generic-param in header field carries channel ID information, following form can be used：
Accept-Contact: *; chld= "TV1"
Or
Accept-Contact: *; TV1;
Above-mentioned various forms may be used to indicate that business request information or service request response message are related to channel TV1.
In service request response message, the SDP that parameter in the SIP head domain extended in method three can be with attribute extension in method one is used cooperatively, and can also be used cooperatively with the SDP of non-expanding, wherein：
When the parameter and the SDP of non-expanding that are extended in SIP head domain in method three are used cooperatively, user terminal all regard the total medium description content included by the SDP of the non-expanding as the related media description content of the channel indicated by the parameter extended in the SIP head domain after the service request response message is received；
When the SDP of attribute extension in the parameter and method one extended in SIP head domain in method three is used cooperatively, user terminal is after the service request response message is received, the channel ID information included by parameter and the media description content included by SDP that will be extended in SIP head domain are matched, the channel information corresponding to extended attribute row then matched in SDP with the channel ID information included by the parameter that is extended in SIP head domain is the channel information specified, and other description informations can exist independently of channel information.It is similar with method two, in this case, when user terminal needs switching, it can not indicate that the channel being switched is closed in sdp, it is only necessary to which making does not include the identification information for the channel or pent channel being switched in the parameter extended in SIP head domain.That is, if end side needs channel switch, business request information is sent to the channel ID information that the parameter newly extended in network side, business request information SIP head domain does not include being switched channel by end side；Network side by the SDP property columns of the new definition in the message received with it is described
The parameter newly extended in SIP header fields is matched, the channel ID information for the switching target channel that the channel ID information matched is specified as user.
Method four, channel ID information is carried by message body；
When the interface E1 and Dialog processing module and application processing module of user terminal and Dialog processing module interface E2 use SIP, RTSP, during the agreements such as HTTP, in business request information and its service request response message, SIP, RTSP can be passed through, the message bodies such as HTTP carry channel ID information, message body can use text mode, XML (extensible Markup Language, eXtensible Markup Language）Coded system or other coded systems.
In an example of the present embodiment, in business request information and its service request response message, using XML Schema (patterns）Channel ID information is defined, the language that one of which is specifically defined channel ID information is given below, a variety of changes are there may be when being specifically defined：
<?xml version=" 1.0" encoding="UTF-8"?>
<xs: schema targetNamespace="urn:ietf:params:xml:ns:chid"
xmlns="urn:ietf:params:xml:ns:chid"
xmlns:xs="http://www. w3.org/2001/XMLSchema" elementFormDefault="qualified">
<xs: element name= ' ' chidli st " >
<xs:complexType>
<xs:sequence>
<xs: element name="chid"
minOccurs:" 1 " maxOccurs= ' ' unbounded " />
<xs: attribute name="id" type="xs:string" use="required'7〉
</xs:sequence>
</xs:complexType>
</xs:schema>
Realizing IPTV class business, during such as LiveTV, TsTV business, terminal is by using SIP, RTSP, by text mode in the message body of the business request information of the agreements such as HTTP, XML coded systems or other coded systems are identified to asked channel；Similarly, by text mode in the message body of the service request response message of application processing module, XML is compiled
Code mode or other coded systems are identified to ask channel, and also simultaneously in SIP in the service request response message, RTSP, and carry SDP in HTTP etc. is been described by channel information, and both are completely described to a channel in combination.
One given below uses the example that XML coded systems carry channel ID information in sip message body.The body of XML codings（Body) using above-mentioned definition rule, indicate that service request is related to TV1 channels.
<?xml version=" 1.0" encoding="UTF-8"?>
<chidlist xmlns= ' ' urn： ietf： params： xml： ns : chid ' '
xmlns:xsi="http：〃 www.w3.org/2001/XMLSchema-instance"〉
<chid id=TVl/〉
</chidlist>
In service request response message, the SDP that the message body that channel ID information is carried in method four can be with attribute extension in method one is used cooperatively, and can also be used cooperatively with the SDP of non-expanding, wherein：
When carrying the message body of channel ID information in method four and the SDP of non-expanding is used cooperatively, user terminal all regard the total medium description content included by the SDP of the non-expanding as the related media description content of the channel indicated by the message body after the service request response message is received；
When the SDP of attribute extension in the message body and method one that channel ID information is carried in method four is used cooperatively, user terminal is after the service request response message is received, media description content included by channel ID information and SDP included by message body is matched, the channel information corresponding to extended attribute row then matched in SDP with the channel ID information included by message body is the channel information specified, and other description informations can exist independently of channel information.It is similar with method two, in this case, when user terminal needs switching, it can not indicate that the channel being switched is closed in sdp, it is only necessary to which making does not include the identification information for the channel or pent channel being switched in message body.
Method five, channel ID information is carried by the event package of sip message.
When the interface E1 and Dialog processing module and application processing module of user terminal and Dialog processing module interface E2 are realized using Session Initiation Protocol, a channel description information event package defined in the event package of sip message, and channel ID information is carried by the event package.
In an example of the present embodiment, a channel description information event package defined in the event package of sip message, event Packet type is named as " channel information ", and channel ID information, and/or multicast address and port, and/or other channel parameters are carried by the parameter of event package.
IPTV class business is being realized, during such as LiveTV, TsTV business, terminal can be by subscribing to（Subscribe asked channel is identified in) asking, asks network side to notify (notify) mode to send the channel information of specified channel；In order to indicate that network side returns to specific channel information in the request, wherein need to carry the filter condition for carrying out event package information filtering by channel ID information chid, this can be indicated technology by existing filter condition or carry out enhancing to it and met.Application processing module is then with notice（Notify) mode responds user's request, and the channel that the event package asked user is carried wherein and is described, is indicated in corresponding event package comprising clear and definite channel.
When the transmission of channel ID information is realized using this method, when user terminal needs to close channel, by quitting the subscription of（Unsubscribe the channel for needing to close is identified to close corresponding channel in) asking；When user terminal needs switching channels, the channel being switched is closed by being identified in unsubscription request to the channel being switched, and switching target channel is identified to realize the switching of channel in request is subscribed to.
In summary, when using Session Initiation Protocol, using INVITE, relnvite, INFO, SUBSCRIBER, NOTIFY, MESSAGE, (Acknowledgement confirms response to ACK）Deng the change of progress business or the transmission of progress average information in business procedure, channel ID information can be carried out using the above method one to method four, to enter industry using INVITE
Exemplified by business request, channel ID information is carried in INVITE, and service request response message can be 183 intermediate responses or 200 Ok to INVITE, but wherein all carry channel ID information and its corresponding channel information.
And service request can also use RTSP or http protocol, when using RTSP or HTTP agreements, RTSP description can be used（DESCRIBE) message or HTTP acquisition (GET) message ask channel information to application processing module, and channel ID information can be carried out using the above method one or method four in RTSP DESCRIBE message or HTTP GET message.Application processing module then can return to channel information and channel ID information, wherein channel ID information equally can be carried out using the above method one or method four in such as 200 ok in RTSP or http response message to user.
Method six, passes through SIP universal resource indicators（URI) channel ID information is carried., can be by extending URI parameters or user types in SIP URI comprising instruction channel ID information in practical application.Indicate that channel ID information can include：The information such as the title and/or channel number of channel/channel group, channel type, member's channel information of channel group and service provider.
Such as, a URI parameter, such as " tv " can be increased newly, and the URI parametric forms newly increased are not limited, and are identified for identifying this SIP URI for television channel, parameter format（ 1 ):Form (1): sip: user@host:port;tv;
Or, a user type can also be increased newly, by user types, SIP entity can determine the broadcasting television channel that network television terminal function is just being asked, parameter format（2 ):
Form (2): sip: user@host:port;user=tv.
Based on form defined above, specific channel can be determined by network using default channel is represented without channel information.The Web TV application server 102 for providing TV business determines the channel of user's request according to local policy or user related data.
The determination method of default channel is including but not limited in the following manner：
A, default channel or main channel using Web TV application server 102（That is TV
The main channel of service provider）It is used as default channel；
B, using record the previous viewing of user channel or user set startup channel
(i.e. user's start viewing all since the channel every time）It is used as default channel.Based on above-mentioned form（And form 1)（2), the mark of default channel is exemplified below： sip:wqed.org;Tv or
sip:wqed.org;user=tv
Based on defined above（And form 1)（2), the identification method of specific channel or channel group can be with:Under mouthful：
Specific channel ID information included in SIP URI can include specific channel designation or specific channel number, specific channel group name or specific channel group #.May be including but not limited to following several situations：
(1), comprising specific channel ID information（Containing specific channel number and/or specific channel designation）；
(2), comprising specific channel ID information（Containing specific channel number and/or specific channel designation）, the channel group information that URI parameters belong to comprising the specific channel；
(3), comprising specific channel group identification information（Include specific channel group name and/or specific channel group #）.
Such as：Television channel or channel group of the channel number that Web TV application server 102 is provided for 1023, are exemplified below：：
sip： 1023 @ wqed.org；Tv or
sip: 1023 @ wqed.org ;user=tv
Although having been described in detail extending URI parameters and user types that by way of identifying television channel, channel other specification can also be carried by extending other URI parameters above.The channel other specification is including but not limited to service provider's information, channel type（Such as direct broadcast band or time shifting channel）With channel attribute（Such as whether supporting TrickMode attributes）Etc. other parameters.Use user
The method that part describes default channel, specific channel and channel group can have ^ blunt many, and the embodiment of the present invention does not do any limitation to specific implementation method.
Such as：Identify whether certain channel has " whether supporting TrickMode to operate " attribute, identification method citing:Under mouthful：
sip: 1023 @ wqed.org ;tv;trickMode ；Or
sip: 1023 @wqed.org;user=tv;trickMode
In the television system for being currently based on IP internets, frequently with the channel identication method of TV URI forms, in electronic program list（EPG the television channel) or in Web page identified comprising TV URI（Direct broadcast band or time shifting channel）.
In the TV URI mechanism defined based on RFC2838, the identifier of " broadcast " partly for DNS domain name type, without routing function.When tv URI are default channel descriptor format, the SIP URI of the mark TV channels after conversion do not include channel information.It is exemplified below：
Tv URI are：<tv:wqed.org>(description WQED television channels)
SIP URI are after conversion：
SIP URI: <sip: wqed.org @example.com;user=tv;>^
<sip: wqed.org @ example. com;tv; >
Or, directly using tv URI in SIP signalings.When ITF initiates SIP sessions, TV URI are directly included in Request-URI/To header fields.Core IMS are received after SIP session requests, and the SIP URI of the corresponding mark television channels of TV URI are inquired about to television channel identification server, and then IMS Core route SIP signalings to the IPTV AS for providing television services according to SIP URI.
Furthermore it is also possible to using the existing header field of Session Initiation Protocol or header field parameter（Or extension header field or header field parameter）Carry default（Or it is current）Channel ID information.Channel group and information about firms can be also carried by the way of XML message, a kind of content type is such as defined：
Content-Type: application/tv-package-list
XML message body is exemplified as：
<package package-id="sip:packagel @ tvserver.com";
<entry channel^" sip： channel 1 @ tvserver.com"/>
<entry channel="sip： channel2 @ tvserver.com"/>
</package>
The scheme of channel ID information is carried for method six, it is assumed that user terminal is network television terminal function（IPTV Terminal Function, ITF), the application processing module of network side is Web TV application server（IPTV AS ).In this case, further it is described in detail with several preferred embodiments below.
Fig. 3 is the method flow schematic diagram of offer television services in the SIP network according to the embodiment of the present invention.As shown in figure 3, this method includes：
Step 301:Network television terminal function initiates SIP session requests to Web TV application server, and the SIP URI for indicating channel ID information are included in the SIP session requests;
Step 302:Web TV application server parses the SIP URI to obtain the channel ID information, and the television channel for determining to play to network television terminal function according to the channel ID information.
The television channel of determination described here is exactly that channel information is determined in fact.Certainly, after Web TV application server determines channel information, channel information can also be returned to network television terminal function.
Based on above-mentioned flow, in a kind of specific implementation, network television terminal function sends SIP URI inquiry requests to television channel identification server, television channel identification server is according to TV URI and SIP URI corresponding relation, SIP URI corresponding to TV URI are sent to network television terminal function, wherein including channel ID information in the SIP URI；Then network television terminal function initiates SIP session requests to Web TV application server, and the SIP URI are included in the SIP session requests;Web TV application server parses the SIP
URI is to obtain the channel ID information, and the television channel for determining to play to network television terminal function according to the channel ID information.
In another specific implementation, network television terminal function sends SIP session requests to Core IMS, and TV URI are included in the SIP session requests;Core IMS send SIP URI inquiry requests according to the TV URI being resolved to television channel identification server；SIP URI corresponding to TV URI are sent to Core IMS by television channel identification server according to TV URI and SIP URI corresponding relation;The SIP session requests are routed to Web TV application server by Core IMS according to the SIP URI received, Web TV application server parses the SIP URI to obtain the channel ID information, and the television channel for determining to play to network television terminal function according to the channel ID information.
Fig. 4 be according to request viewing in the SIP network of the embodiment of the present invention it is default live or when mobile television channel schematic flow sheet.
As shown in figure 4, this method includes：
Step 401:Network TV terminal sends INVITE requests to Core IMS entities, and Request-URI is provides the SIP URI information of the IPTV application server entities of TV business, and parameter User is " tv " type or includes " tv " parameter.
Core IMS entities described here are exactly Dialog processing module.
Step 402:INVITE requests are routed to IPTV application servers by Core IMS entities according to the routing rule of existing Session Initiation Protocol.
Step 403:IPTV application servers parse Request-URI after receiving INVITE requests, are judged as the session request of default channel identication, service authorization passes through（200 OK message）, then IPTV application servers determine the currently viewing channel of user according to local policy and/or user data, and return to user the media description information of the current channel（SDP offer), default channel information, the relevant information of the corresponding channel group information of default channel and other member's channels.
Step 404:The response message of IPTV application servers is forwarded to Web TV by Core IMS
Terminal.
Step 405:Network TV terminal is received after response message, preserves the information that includes in response message, and the media description response of current channel is returned according to terminal capability to Core IMS（SDP Answer) message.
Step 406:The media description response message of Core IMS forwarding network TV terminals is to IPTV application servers.
Step 407:Network TV terminal sends to multicast control point according to media negotiation result and adds multicast group report.
Step 408:Multicast control point sends multicast media stream to network TV terminal.
Fig. 5 is the schematic flow sheet of the specific channel of request viewing in the SIP network according to the embodiment of the present invention.As shown in figure 5, this method includes：
Step 501：Network TV terminal entity sends INVITE requests and arrives Core IMS entities, Request-URI is the SIP URI information for the IPTV application server entities for providing TV business, parameter User is " tv " type or includes " tv " parameter, specific specific channel information, such as specific channel coding or channel designation are included in User parts.
Step 502:INVITE requests are routed to IPTV application servers by Core IMS entities according to the routing rule of existing Session Initiation Protocol.
Step 503:IPTV application servers are received after INVITE requests, are parsed Request-URI, are judged as the session request of specific channel identication, service authorization passes through, then IPTV application servers determine the currently viewing channel of user.IPTV application servers return to the media description information of current channel to user（SDP offer), specific channel ID information, the relevant information of the corresponding channel group identification information of specific channel and other member's channels.
Step 504:The response message of Core IMS forwarding IPTV application servers is to network TV terminal.
Step 505:Network TV terminal is received after response, preserves the information included in response, and root
The media description response to Core IMS current channels is returned according to terminal capability（SDP Answer) message.
Step 506:The media description response message of Core IMS forwarding network TV terminals is to IPTV application servers.
Fig. 6 is the schematic flow sheet of the specific channel group of request viewing in the SIP network according to the embodiment of the present invention.
As shown in fig. 6, this method flow includes：
Step 601:Network TV terminal entity sends INVITE requests and arrives Core IMS entities, Request-URI is the SIP URI information for the IPTV application server entities for providing TV business, parameter User is " tv " type or includes " tv " parameter, specific channel group identification information, such as specific channel group coding or channel group name are included in User parts；
Step 602:INVITE requests are routed to IPTV application servers by Core IMS entities according to the routing rule of existing Session Initiation Protocol.
Step 603:IPTV application servers are received after INVITE requests, parse Request-URI, are judged as the session request of specific channel group mark, and service authorization passes through, and then IPTV application servers determine the currently viewing channel group of user.IPTV application servers can determine current channel using any of following manner：Use Web TV application server set channel group in default channel for current channel；Or the channel in the channel group of the previous viewing of user is used for current channel；Or use user set channel group in default channel for current channel.IPTV application servers return to the media description information of current channel to user（SDP offer), the relevant information of specific channel group information and other member's channels.
Another optional mode is that IPTV application servers do not know the television channel that user initially watches, the television channel for selecting initially to watch according to member's channel information by user.
Step 604:The response message of Core IMS forwarding IPTV application servers is to network TV terminal.
Step 605:Network TV terminal is received after response, preserves the information included in response, and return to the media description response to Core IMS current channels according to terminal capability（SDP Answer) message.
Step 606:The media description response message of Core IMS forwarding network TV terminals is to IPTV application servers.
Fig. 2 ~ Fig. 6 is the embodiment of the method for IPTV service.For these embodiments of the method, the embodiment of the present invention also provides a kind of IPTV system.As shown in fig. 7, IPTV system can include end side and network side, wherein：
End side includes sending the module of the channel ID information of user's specified channel to network side；Network side includes returning to the module of the corresponding channel information of channel ID information of user's specified channel to end side.
Wherein, the command reception module for being used to receive user operation instruction, in addition to three below module are included as the user terminal of end side：
Send the module of the channel ID information of command reception module specified channel；
Send the module that command reception module specifies the corresponding channel ID information of channel closed；Send the module for the corresponding channel ID information of switching target channel that command reception module is specified.
The function of above three module can be realized by control module as shown in Figure 7.Certain above three module can also be three independent modules or other combining forms.
As shown in fig. 7, network side includes application processing module and Dialog processing module, wherein：Dialog processing module forwards channel ID information and channel information between end side and application processing module；
Application processing module, including the receiving module for receive information, in addition to following two modules：
The channel ID information received according to receiving module sends channel corresponding to the identification information
The module of information；
The corresponding channel ID information of switching target channel received according to receiving module, sends the module of the channel information of corresponding switching target channel.
The function of above-mentioned two module can be by processing modules implement as shown in Figure 7.Certain above-mentioned two module can also be two independent modules or other combining forms.
In practical application, the user terminal can be network television terminal function（IPTV Terminal Function, ITF), the application processing module of network side can be for Web TV application server (IPTVAS) in this case, and the system structure diagram can be represented with Fig. 8.
As shown in Fig. 8, the system includes network television terminal function（IPTV Terminal Function, ITF) 101 and Web TV application server（IPTV AS ) 102.
Network television terminal function 101, for initiating SIP session requests to Web TV application server 102, includes the SIP URI for indicating channel information in the SIP session requests;
Web TV application server 102, for parsing the SIP URI to obtain the channel information, and determines the television channel to the broadcasting of network television terminal function 101 according to the channel information.
Certainly, the entity equivalent to Dialog processing module should be also included in fig. 8, is not drawn here.If Dialog processing module is IMS core（Core IMS), and further increase a television channel identification server, the structural representation of the system can be represented with Fig. 9.
As shown in figure 9, the system includes IPTV terminal 201, IPTV application servers 202, IMS cores（Core IMS) 203 and television channel identification server 204.
IPTV terminal 201 is the IPTV terminal that user watches television services, and it supports Session Initiation Protocol, serves as sip user device role, and television services are asked to the IPTV application servers 202 for providing television services by the route of IMS core 203.
Under normal circumstances, user can be configured to IPTV terminal 201, every time after start, and the channel of default channel or last viewing is watched automatically.In this case, after user starts shooting, IPTV terminals 201 automatically initiate SIP sessions, the Request-URI header fields of the INVITE requests of transmission
In include the SIP URL for indicating the default channel formula of request
When user watches live television programming（When LTV), pass through electronic program list（EPG specific direct broadcast band or direct broadcast band group) are selected and is clicked on, IPTV terminal 201 is initiated to include the SIP URL for indicating specific channel identication or channel group mark in SIP sessions, the Request-URI header fields of the INVITE requests of transmission
IPTV terminal 201 is received after reliable Temporary Response or the success response of initial INVITE request, can add the corresponding ip multicast group of current channel.
In television channel identification server 204, TV URI and SIP URI corresponding relation are preserved.In conversation procedure, IPTV terminal 201 can directly inquire about the SIP URL of mark channel corresponding with TV URI by the Q1 interfaces with television channel identification server 204 to television channel identification server 204
The process that IPTV terminal 201 directly inquires about SIP URI by Q1 interfaces is specifically included：IPTV terminals 201 send SIP URI inquiry requests to television channel identification server 204, television channel identification server 204 is according to TV URI and SIP URI corresponding relation, SIP URI corresponding to TV URI are sent to IPTV terminal 201, then SIP session requests for the SIP URI that IPTV terminal 201 is returned by IMS core, IPTV application servers 202 parse the SIP URI to obtain the channel ID information, and the television channel for determining to play to IPTV terminal 201 according to the channel ID information.Hereafter, the channel information of determination can be returned to IPTV terminal 201 by IPTV application servers 202.
Television channel identification server 204 can also provide TV URI query interface by the Q2 interfaces between IMS core 203 to IMS core 203 or other entities.IMS core 203 provides the functions such as signalling route, session control and business triggering.If IMS core 203 receives the SIP session requests comprising TV URI from IPTV terminals 201, IMS core 203 is by the corresponding SIP URI of the Q2 interface polls TV URI, and the SIP URI then obtained according to inquiry will
The SIP session requests that IPTV terminal 201 is initiated are routed to IPTV application servers 202.
IPTV application servers 202 such as provide live television service to provide the application server of television services（LTV), content service on demand（Content On Demand) etc. business.IPTV application servers 202 are received after INVITE requests, the channel information carried in parsing Request-URI header fields.
In the SIP network of embodiment illustrated in fig. 9, SIP session requests are specifically route using IMS core 203 to IPTV application servers 202.In fact, the invention is not limited in this.Skilled person realizes that, as long as the entity with SIP session request routing functions is suitable for the present invention in SIP network, and IPTV terminal 201 directly can also perform interactive function by Session Initiation Protocol with IPTV application servers 202.
If Request-URI header fields do not include channel ID information, then it is assumed that IPTV terminal 201 asks default channel.IPTV application servers 202 determine the current channel played to user according to local service rule or strategy.IPTV application servers 202 are determined after default channel, and the corresponding media description information of channel is included in SIP response message SDP message bodies（SDP Offer), and the information of the corresponding channel group information of the default channel, channel group mark and other member's channels can be included in the reliable Temporary Responses of SIP or success response message.
If Request-URI header fields include specific channel ID information or channel group identification information, IPTV application servers 202 parse channel ID information according to local policy or service logic, determine the specific channel or channel group of the request of IPTV terminal 201.If channel group mark then determines that method determines current channel according to above-mentioned default channel.IPTV application servers 202 media description information comprising current channel, channel group can be identified and other member's channel informations in the reliable Temporary Responses of SIP or success response message.
After the embodiment of the present invention, channel ID information can identify default television channel, specific TV channel and television channel group in SIP network.The SIP networks include but is not limited to the networks such as NGN/IMS/IMS Based IPTV.
Based on above-mentioned analysis, the embodiment of the present invention also proposed a kind of network TV terminal and Web TV application server.
Figure 10 is the network TV terminal structural representation according to the embodiment of the present invention.
As shown in Figure 10, the network TV terminal includes SIP session requests initiation unit 701 and TV information shows unit 702.Wherein：
SIP session requests initiate unit 701, and for initiating SIP session requests to Web TV application server, the SIP URI for indicating channel ID information are included in the SIP session requests;TV information shows unit 701, for receiving the television channel information determined by Web TV application server according to the channel ID information, and shows the television channel information.
Alternatively, SIP session requests initiate unit 701, for sending the SIP URI inquiry requests for including TV URI to television channel identification server, receive the SIP URI corresponding to the TV URI returned by television channel identification server, and the SIP session requests for initiating to include SIP URI to Web TV application server, channel ID information is included in the SIP URI；Now TV information shows unit 701, for receiving the television channel information determined by Web TV application server according to the channel ID information, and shows the television channel information.
Figure 11 is the Web TV application server structural representation according to the embodiment of the present invention.As shown in Figure 11, the Web TV application server includes channel ID information acquiring unit 801 and TV information provides unit 802, wherein：
Channel ID information acquiring unit 801, the SIP session requests for the SIP URI for indicating channel ID information are included for receiving, and parse the SIP URI to obtain the channel ID information；TV information provides unit 802, for the television channel for determining to play to network television terminal function according to the channel ID information, and sends the television channel information to the network TV terminal.
The embodiment of the present invention also proposed a kind of television channel identification server.
Figure 12 is the television channel identification server structural representation according to the embodiment of the present invention.As schemed
Shown in 12, television channel identification server includes corresponding relation storage unit 901 and SIP URI query units 902, wherein
Corresponding relation storage unit 901, preserves TV URI and SIP URI corresponding relation；
SIP URI query units 902, for receiving network television terminal function or the SIP URI inquiry requests comprising TV URI transmitted by Core IMS, and according to TV URI and SIP URI corresponding relation, the SIP URI corresponding to the TV URI are sent to the network television terminal function or Core IMS.
The embodiment of the present invention also proposed a kind of Core IMS.Figure 10 is the Core IMS structural representations according to the embodiment of the present invention.
As shown in figure 13, the Core IMS include TV URI resolution units 1001 and routing unit 1002, wherein
TV URI resolution units 1001, TV URI SIP session requests are included for being received from network television terminal function, TV URI are parsed from the SIP session requests, and send SIP URI inquiry requests to television channel identification server；
Routing unit 1002, for the SIP session requests to be routed into Web TV application server, wherein including the SIP URI returned by television channel identification server in response to the SIP URI inquiry requests in the SIP session requests.
In summary, comprising the SIP URI for indicating channel ID information in the SIP session requests sent due to network television terminal function to application server, application server can determine channel ID information according to the SIP URI, therefore the channel identication of the embodiment of the present invention can identify default television channel, specific TV channel and television channel group in SIP network.And the channel identication of the embodiment of the present invention can uniquely identify a television channel or a television channel collection in extensive SIP network.And SIP entity can route SIP signalings to other specific SIP entities according to channel identication.
The present invention can also be in IMS Based IPTV systems in following live television service simultaneously
It is applied：
Mark to live broadcast service in the IMS based IPTV systems that current TISPAN is defined is described using the concept of business packet, i.e. user subscribes to or subscription/signing is a business packet during signing live broadcast service, it is also to initiate to ask to the business packet during request live broadcast service, because a business packet can include several channels, now being possible to IMS based IPTV network sides can not know that user is current or the initial channel for wanting viewing for sure, and network bandwidth resources can not be reserved, or the Internet resources required for being possible to the channel of reserved network bandwidth resources and user's viewing are mismatched, as a result cause or the bandwidth demand of user can not be met, influence customer experience, or reserved bandwidth is excessive, waste network bandwidth resources.
In view of the above-mentioned problems, can have following several solutions：
1) user is to IPTV system request viewing live telecast, while the business packet of request is indicated in request message, while carry specific television channel information, and the specific television channel information can be user from service selection functional（SSF it is being obtained on), can also be that user terminal is initially set or the channel information watched when exiting of last time or other manner of record are obtained, can also be when carrying specific television channel service identification information, and/or indicate channel group simultaneously（That is business packet）Mark, during business is set up, access of the IPTV networks according to the signing information of business packet to user is authorized, and resource reservation is carried out according to entrained specific channel service identification information, after business is successfully established, terminal adds the television channel that user specifies.Method described in Fig. 5 can provide this scene of live television service.
2) user watches live telecast to IPTV system request, if not denoting that specific television channel in request message but comprising channel group information, or do not denote that specific channel and television channel group, the television channel that user initially watches then is determined by IPTV system, determination mode can be the program preferences set according to user in subscription data, user's viewing custom etc. either according to derived from the program viewing of user's early stage statistics, determine that a suitable channel watches the initial channel of live broadcast service as user, then IPTV system carries initial television channel information in request response, with/
Or other member's channel informations in channel group information, and/or channel group, and resource reservation is carried out according to entrained initial channel information, after business is successfully established, terminal adds initial television channel.Method described in Fig. 4 can provide the live television service scene that specific channel and channel group information are not denoted that in request message.Method described in Fig. 6 can provide request message middle finger prescribed channel group but not denote that the live television service scene of specific channel information.
3) user watches live telecast to IPTV system request, if only carrying television channel group information in request message, specific television channel is not indicated, and IPTV system can not determine television channel in the channel group that user initially watches, then IPTV system notifies member's channel information in terminal channel group（Can be carried or by other message or mode in request response, such as issue the chained address of the channel group）, now, during business foundation, the reserved of Internet resources can not be also accurately completed, the mandate to service request is can be only done（Request is added as bearer network can receive the multicast from user, and obtains the net-work parameter information of each channel in the channel group, multicast address, bandwidth demand etc.）, the television channel that terminal is initially watched according to the selection addition of the channel group membership information of acquisition, now bearer network equipment ECF/EFF is after the Join message of user is received, triggering network（RACS) start reserved resource, complete the reserved of the initial channel resource.Method described in Fig. 6 can provide this scene of live television service.From the spirit and scope of the present invention.So, if these modifications and variations of the present invention belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to comprising including these changes and modification.
Claims (1)
- Claims1st, a kind of service control method of Web TV, it is characterised in that comprise the following steps：The lateral network side of terminal sends the channel ID information of user's specified channel, and receives channel information corresponding to the network side return identification information.2nd, the method as described in claim 1, it is characterised in thatThe method that the end side sends channel ID information is：Channel ID information is carried and is transmitted in business request information by the end side；The method that the end side receives channel information is：Channel information is received in the service request response message that the end side is returned from network side.3rd, method as claimed in claim 2, it is characterized in that, also include the channel ID information corresponding with the channel information in the service request response message that the network side is returned, the end side is when receiving the channel information returned, and this method is still further comprised：The end side receives the channel ID information from the service response message of return.4th, the method as described in claim 3, it is characterised in that the channel ID information and channel information that the service response message is carried be：A group or more of channel ID informations and channel information.5th, the method as described in any one of claim 2 to 4, it is characterised in that channel ID information is carried the method in business request information and is by the end side：The end side is carried the channel ID information in business request information by the Session Description Protocol SDP property columns newly defined.6th, the method as described in claim 3 or 4, it is characterised in that the method that the network side carries channel ID information is：The network side is carried the channel ID information in service request response message by the SDP property columns newly defined. 7th, the method as described in any one of claim 2 to 4, it is characterised in that received in the end side after channel information, if end side needs to close specified channel, this method further comprises：The end side notifies network side by indicating the specified channel closing in the SDP that business request information is carried.8th, the method as described in any one of claim 2 to 4, it is characterised in that received in the end side after channel information, if end side needs to carry out channel switch, this method further comprises：Switching target channel is indicated in the end side by adding the channel ID information property column of switching target channel in the SDP that business request information is carried, and indicates that the channel being switched is closed；The network side increases the channel information that SDP channel information property columns describe the switching target channel newly in the SDP that service request response message is carried.9th, the method as described in any one of claim 2 to 4, it is characterised in that received in the end side after channel information, if end side needs to carry out channel switch, this method further comprises：The switching of channel is indicated by changing existing channel ID information property column in the SDP that business request information is carried in the end side；The network side changes the corresponding channel information property column of the channel ID information property column to indicate the channel information of switching target channel in the SDP that service request response message is carried.Channel ID information is carried the method in business request information and is by the 10th, method as described in any one of claim 2 to 4, it is characterised in that the end side and network side are interacted using Session initiation Protocol SIP, the end side：The end side is carried the channel ID information in business request information by the parameter newly extended in the SIP head domain or SIP head domain that newly extend. 11st, the method as described in claim 3 or 4, it is characterised in that the method that the network side carries channel ID information is：The network side is carried the channel ID information in business request information by the parameter newly extended in the SIP head domain or SIP head domain that newly extend.12nd, the method as described in any one of claim 2 to 4, it is characterised in that the end side is received after channel information, if end side needs channel switch, this method further comprises：Business request information is sent to the channel ID information that the SIP head domain newly extended in network side, the business request information or the parameter newly extended in SIP head domain do not include being switched channel by the end side；The network side is matched the SDP property columns of the new definition in the message received with the parameter newly extended in the SIP head domain or SIP head domain of the new extension, the channel ID information for the switching target channel that the channel ID information matched is specified as user.13rd, the method as described in any one of claim 2 to 4, it is characterised in that channel ID information is carried the method in business request information and is by the end side：The end side is carried the channel ID information in business request information by message body.14th, the method as described in claim 3 or 4, it is characterised in that the method that the network side carries channel ID information is：The network side is carried the channel ID information in service request response message by message body.15th, the method as described in any one of claim 2 to 4, it is characterised in that the end side is received after channel information, if end side needs channel switch, this method further comprises：Business request information is sent to the channel ID information that message body in network side, the business request information does not include being switched channel by the end side；The network side is matched the SDP property columns newly defined in the message received with the message body, the frequency for the switching target channel that the channel ID information matched is specified as user Road identification information.16th, the method as described in any one of claim 2 to 4, it is characterised in that channel ID information is carried the method in business request information and is by the end side：The end side is carried the channel ID information in business request information by the event package of sip message.17th, the method as described in claim 3 or 4, it is characterised in that the method that the network side carries channel ID information is：The network side is carried the channel ID information in service request response message by the event package of sip message.18th, method as claimed in claim 16, it is characterised in that the end side is received after channel information, if end side needs to close specified channel, this method further comprises：The terminal notifies network side by indicating the specified channel closing in unsubscription request.19th, method as claimed in claim 16, it is characterised in that the end side is received after channel information, if end side needs to carry out channel switch, this method further comprises：The channel that the end side is switched by being indicated in unsubscription request is closed to notify network side, and indicates switching target channel to notify network side in request is subscribed to.20th, the method as described in claim 1, it is characterised in that the channel information at least includes：Channel multicast address and port.A kind of method that the 21st, television services are provided in SIP network, it is characterised in that this method includes：Web TV application server receives the SIP session requests initiated by network television terminal function, and the SIP URI for indicating channel ID information are included in the SIP session requests;Web TV application server parses the SIP URI to obtain the channel ID information, and the television channel for determining to play to network television terminal function according to the channel information.22nd, method as claimed in claim 21, it is characterised in that in the SIP session requests Include the SIP URI for indicating default channel;The Web TV application server determines the default channel according to local policy and/or user data.23rd, method as claimed in claim 22, it is characterised in that the determination mode of the default channel is included：The channel of the previous viewing of user is used for default channel；OrThe startup channel that user is set is used for default channel.24th, method as claimed in claim 23, it is characterised in that this method further comprises：The Web TV application server returns to the default channel information determined using sip response message to end side；OrThe Web TV application server returns to the default channel information determined to end side using sip response message and channel group is identified；OrThe Web TV application server returns to the default channel information determined, channel group mark and channel group membership's information using sip response message to end side.25th, method as claimed in claim 21, it is characterised in that the SIP URI for indicating specific channel or channel group are included in the SIP session requests;The Web TV application server parses channel information according to local policy and/or service logic, determines specific channel or the channel group asked end side.26th, method as claimed in claim 21, it is characterised in that the SIP URI for indicating specific channel group are included in the SIP session requests;The Web TV application server parses channel information according to local policy and/or service logic, determines the specific channel group that end side is asked, and determine initial channel using any of following manner：Use Web TV application server set channel group in default channel for initial channel；Or the channel in the channel group of the previous viewing of user is used for initial channel；Or Default channel is used in the channel group that user sets for initial channel.27th, method as claimed in claim 25, it is characterised in thatThe SIP URI include：Specific channel number and/or specific channel designation；OrSpecific channel number and/or specific channel designation, or and include the channel group information of specific channel ownership；Specific channel group name and/or specific channel group #.28th, method as claimed in claim 25, it is characterised in that this method further comprises：The Web TV application server returns to the specific channel information determined using sip response message to end side；OrThe Web TV application server returns to the specific channel information determined to end side using sip response message and channel group is identified；OrThe Web TV application server returns to the specific channel information determined, channel group mark and channel group membership's information using sip response message to end side；OrWeb TV application server returns to channel group mark and channel group membership's information using sip response message to network television terminal function.A kind of method that the 29th, television services are provided in SIP network, it is characterised in that this method includes：Television channel identification server receives the SIP URI inquiry requests for including TV URI from end side, television channel identification server is according to TV URI and SIP URI corresponding relation, SIP URI corresponding to TV URI are sent to end side, wherein including channel ID information in the SIP URI；Web TV application server receives the SIP session requests initiated by end side, and the SIP URI are included in the SIP session requests;Web TV application server parses the SIP URI to obtain the channel ID information, And channel information is determined according to the channel ID information.30th, method as claimed in claim 29, it is characterised in that the channel information is carried in SIP URI by spreading parameter or extending user user types.31st, the method as described in claim 29 or 30, it is characterised in that the channel information includes：Any combination of at least one in title, channel number, channel type, member's channel information of channel group or the service provider of channel and/or channel group.A kind of method that the 32nd, television services are provided in SIP network, it is characterised in that this method includes：Core IMS receive the SIP session requests sent by end side, and TV URI are included in the SIP session requests;Core IMS send SIP URI inquiry requests according to the TV URI being resolved to television channel identification server；SIP URI corresponding to TV URI are sent to Core IMS by television channel identification server according to TV URI and SIP URI corresponding relation, and channel ID information is included in the SIP URI；The SIP session requests are routed to Web TV application server by Core IMS according to the SIP URI received, Web TV application server parses the SIP URI to obtain the channel ID information, and the channel information for determining to send to end side according to the channel ID information.33rd, method as claimed in claim 32, it is characterised in that the SIP URI for indicating default channel are included in the SIP session requests;The Web TV application server determines the default channel according to local policy and/or user data.34th, method as claimed in claim 32, it is characterised in that the determination mode of the default channel is included：The channel of the previous viewing of user is used for default channel；Or The startup channel that user is set is used for default channel.35th, the method as described in claim 32,33 or 34, it is characterised in that the SIP URI for indicating specific channel are included in the SIP session requests;The SIP URI include：Specific channel number and/or specific channel designation；OrSpecific channel number and/or specific channel designation, and the channel group information belonged to comprising the specific channel；OrSpecific channel group name and/or specific channel group #.36th, a kind of network television system, including end side and network side, it is characterised in that the end side includes sending the module of the channel ID information of user's specified channel to network side；The network side includes returning to the module of channel information corresponding to the identification information to end side.37th, system as claimed in claim 36, it is characterised in that described to return to application processing module of the module of channel information corresponding to the identification information for network side to end side.38th, the system as described in claim 37, it is characterised in that the end side also includes the module for specifying the corresponding channel ID information of channel closed to notify the application processing module user.39th, the system as described in claim 37, it is characterised in that the end side also corresponding channel ID information of switching target channel including user is specified is sent to the module of the application processing module；The channel information of corresponding switching target channel is sent to end side by the application processing module according to the corresponding channel ID information of switching target channel.40th, the system as described in claim 37,38 or 39, it is characterised in that the network side also includes Dialog processing module, and the channel ID information and the channel information are forwarded between the end side and the application processing module. 41st, a kind of system that television services are provided in session initiation protocol SIP network, it is characterised in that including：Network television terminal function, for initiating SIP session requests to Web TV application server, includes the SIP universal resource indicators URI for indicating channel information in the SIP session requests;Web TV application server, for parsing the SIP URI to obtain the channel information, and the television channel for determining to play to network television terminal function according to the channel information.The system that the 42nd, television services are provided in SIP network as claimed in claim 41, it is characterised in that the system further comprises the television channel identification server for preserving TV Uniform Resource Identifier TV URI and SIP URI corresponding relations,Network television terminal function, for sending the SIP URI inquiry requests for including TV URI to television channel identification server, and sends the SIP session requests for including the SIP URI that television channel identification server is returned to Web TV application server；Television channel identification server, for the corresponding relation according to TV URI and SIP URI, network television terminal function is sent to by the SIP URI corresponding to the TV URI.The system that the 43rd, television services are provided in SIP network as claimed in claim 42, it is characterized in that, the system further comprises that IP multimedia subsystem core Core IMS, Core IMS are used to the SIP session requests being routed to Web TV application service from network television terminal function and cried mouth.The system that the 44th, television services are provided in SIP network as claimed in claim 41, it is characterized in that, the system further comprises Core IMS and television channel identification server, and wherein television channel identification server preserves TV URI and SIP URI corresponding relation；Network television terminal function, for sending SIP session requests to Core IMS, includes TV URI in the SIP session requests;The SIP session requests, for sending SIP URI inquiry requests to television channel identification server according to the TV URI being resolved to, and are routed to by Core IMS according to the SIP URI received Web TV application server；Television channel identification server, for the corresponding relation according to TV URI and SIP URI, Core IMS are sent to by the SIP URI corresponding to TV URI.The system that the 45th, television services are provided in the SIP network as any one of claim 41-44, it is characterised in that the SIP network includes one of following networks：Next generation network, IMS network or the IPTV networks based on IMS.46th, a kind of network television terminal function, it is characterised in that initiate unit including SIP session requests and TV information shows unit, wherein：SIP session requests initiate unit, and for initiating SIP session requests to Web TV application server, the SIP URI for indicating channel information are included in the SIP session requests;TV information shows unit, for receiving the television channel information determined by Web TV application server according to the channel information, and shows the television channel information.47th, a kind of network television terminal function, it is characterised in that initiate unit including SIP session requests and TV information shows unit, wherein：SIP session requests initiate unit, for sending the SIP URI inquiry requests for including TV URI to television channel identification server, receive the SIP URI corresponding to the TV URI returned by television channel identification server, and the SIP session requests for initiating to include SIP URI to Web TV application server, channel information is included in the SIP URI；TV information shows unit, for receiving the television channel information determined by Web TV application server according to the channel information, and shows the television channel information.48th, a kind of Web TV application server, it is characterised in that provide unit including channel information acquiring unit and TV information, wherein：Channel information acquiring unit, for receiving SIP session requests, and parses the SIP URI to obtain the channel information, wherein including the SIP URI for indicating channel information in SIP session requests described; TV information provides unit, for the television channel for determining to play to network television terminal function according to the channel information, and sends the television channel information to the network television terminal function.49th, a kind of television channel identification server, it is characterised in that including corresponding relation storage unit and SIP URI query units, whereinCorresponding relation storage unit, preserves TV URI and SIP URI corresponding relation；SIP URI query units, for receiving network television terminal function or the SIP URI inquiry requests comprising TV URI transmitted by Core IMS, and according to TV URI and SIP URI corresponding relation, the SIP URI corresponding to the TV URI are sent to the network television terminal function or Core IMS.50th, a kind of Core IMS, it is characterised in that including TV URI resolution units and routing unit, whereinTV URI resolution units, TV URI SIP session requests are included for being received from network television terminal function, TV URI are parsed from the SIP session requests, and send SIP URI inquiry requests to television channel identification server；Routing unit, for the SIP session requests to be routed into Web TV application server, wherein including the SIP URL returned by television channel identification server in response to the SIP URI inquiry requests in the SIP session requests51st, a kind of terminal, including for receiving the command reception module of user operation instruction, it is characterised in that the terminal also includes the module for sending the channel ID information of the command reception module specified channel.52nd, the terminal as described in claim 51, it is characterised in that the terminal also includes sending the module that the command reception module specifies the corresponding channel ID information of channel closed.53rd, the terminal as described in claim 51, it is characterised in that the terminal also includes the module for sending the corresponding channel ID information of switching target channel that the command reception module is specified.54th, a kind of application processing module, including the receiving module for receive information, its feature exist In the application processing module also channel ID information including being received according to the receiving module sends the module of channel information corresponding to the identification information.55th, application processing module as claimed in claim 54, it is characterized in that, the application processing module also includes the corresponding channel ID information of switching target channel received according to the receiving module, sends the module of the channel information of corresponding switching target channel.
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| CN2007800005677A CN101326826B (en) | 2006-11-02 | 2007-10-31 | Method, system and apparatus for controlling service of network TV |
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| CNA2006101504928A CN101175198A (en) | 2006-11-02 | 2006-11-02 | Network television service control method and system, terminal and application processing module |
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| CN2007800005677A CN101326826B (en) | 2006-11-02 | 2007-10-31 | Method, system and apparatus for controlling service of network TV |
| PCT/CN2007/070999 WO2008052484A1 (en) | 2006-11-02 | 2007-10-31 | Method, system and apparatus of iptv service controlling |
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| CN101326826A true CN101326826A (en) | 2008-12-17 |
| CN101326826B CN101326826B (en) | 2011-09-14 |
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| CN2007800005677A Expired - Fee Related CN101326826B (en) | 2006-11-02 | 2007-10-31 | Method, system and apparatus for controlling service of network TV |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611947A (en) * | 2011-11-24 | 2012-07-25 | 中兴通讯股份有限公司 | Method, system and media server for establishing multicast channel |
| CN102724209A (en) * | 2012-06-30 | 2012-10-10 | 深圳市华为技术软件有限公司 | Session initialization protocol (SIP)-based file transmission method, terminal and application server |
| CN104349187A (en) * | 2014-10-27 | 2015-02-11 | 乐视网信息技术（北京）股份有限公司 | Method, device and system for self-defining live television stations |
| CN104427296A (en) * | 2013-09-05 | 2015-03-18 | 华为终端有限公司 | Method and device for transmitting medium streams in video conference |
| CN109583453A (en) * | 2017-09-29 | 2019-04-05 | 阿里巴巴集团控股有限公司 | The recognition methods of image and device, the recognition methods of data, terminal |
| CN111225241A (en) * | 2019-12-30 | 2020-06-02 | 视联动力信息技术股份有限公司 | Communication method and device |
| CN116074469A (en) * | 2023-03-14 | 2023-05-05 | 浙江华创视讯科技有限公司 | Method and device for joining conference, storage medium and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8184002B2 (en) | 2008-07-28 | 2012-05-22 | Huawei Technologies Co., Ltd. | Method and device for receiving emergency event alert |
| CN101640573B (en) * | 2008-07-28 | 2011-09-14 | 华为技术有限公司 | Method, device and system for receiving emergency notification |
| CN101656868B (en) * | 2008-08-21 | 2011-05-18 | 华为技术有限公司 | Method and device for controlling IPTV live broadcast |
| CN102158502A (en) * | 2010-02-11 | 2011-08-17 | 上海博泰悦臻电子设备制造有限公司 | Methods and devices for providing and acquiring vehicle information and vehicle information transmission system |
| CN102158509A (en) * | 2010-02-11 | 2011-08-17 | 上海博泰悦臻电子设备制造有限公司 | Vehicle information providing and acquisition methods and devices, and vehicle information transmission system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100477667C (en) * | 2006-05-10 | 2009-04-08 | 中国电信股份有限公司 | Method and system for realizing message business for network television network |
-
2006
- 2006-11-02 CN CNA2006101504928A patent/CN101175198A/en active Pending
-
2007
- 2007-10-31 CN CN2007800005677A patent/CN101326826B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611947A (en) * | 2011-11-24 | 2012-07-25 | 中兴通讯股份有限公司 | Method, system and media server for establishing multicast channel |
| WO2013075471A1 (en) * | 2011-11-24 | 2013-05-30 | 中兴通讯股份有限公司 | Method, system and media server for creating multicast channel |
| CN102611947B (en) * | 2011-11-24 | 2017-11-17 | 中兴通讯股份有限公司 | Create method, system and the media server of multicast channel |
| CN102724209A (en) * | 2012-06-30 | 2012-10-10 | 深圳市华为技术软件有限公司 | Session initialization protocol (SIP)-based file transmission method, terminal and application server |
| CN104427296A (en) * | 2013-09-05 | 2015-03-18 | 华为终端有限公司 | Method and device for transmitting medium streams in video conference |
| CN104349187A (en) * | 2014-10-27 | 2015-02-11 | 乐视网信息技术（北京）股份有限公司 | Method, device and system for self-defining live television stations |
| CN109583453A (en) * | 2017-09-29 | 2019-04-05 | 阿里巴巴集团控股有限公司 | The recognition methods of image and device, the recognition methods of data, terminal |
| CN111225241A (en) * | 2019-12-30 | 2020-06-02 | 视联动力信息技术股份有限公司 | Communication method and device |
| CN116074469A (en) * | 2023-03-14 | 2023-05-05 | 浙江华创视讯科技有限公司 | Method and device for joining conference, storage medium and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101326826B (en) | 2011-09-14 |
| CN101175198A (en) | 2008-05-07 |
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