CN101677396A - Method, system and device for negotiation of media streams of preview channel - Google Patents
Method, system and device for negotiation of media streams of preview channel Download PDFInfo
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- CN101677396A CN101677396A CN200810212064A CN200810212064A CN101677396A CN 101677396 A CN101677396 A CN 101677396A CN 200810212064 A CN200810212064 A CN 200810212064A CN 200810212064 A CN200810212064 A CN 200810212064A CN 101677396 A CN101677396 A CN 101677396A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/24—Systems for the transmission of television signals using pulse code modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4383—Accessing a communication channel
- H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
- H04N21/6125—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via Internet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8549—Creating video summaries, e.g. movie trailer
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Abstract
The embodiment of the invention discloses a method, a system and a device for the negotiation of media streams of a preview channel. The method comprises the following steps: receiving a negotiation request of media streams of a preview channel from a device of a user; generating a negotiation response to the media streams of the preview channel based on the negotiation request of the media streams of the preview channel; and sending the negotiation response to the media streams of the preview channel to the user device to ensure that the user device obtains the media streams of the preview channel based on the negotiation response to the media streams of the preview channel. In the embodiment of the invention, by the negotiation of media streams of a preview channel with a user device, the media streams of the preview channel are established to realize that IPTV users can preview the content of channel media streams.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of mthods, systems and devices of negotiation of media streams of preview channel.
Background technology
IPTV (Internet Protocol Television, internet protocol TV) business is a kind of broadband IP (Internet Protocol that utilizes, Internet Protocol) network, integrate multiple technologies such as the Internet, multimedia, communication, the brand-new technology of the multiple interactive services that comprises Digital Television is provided to the domestic consumer.The user can use PC or network machine top box to enjoy the IPTV business at home, also can enjoy the IPTV business by portable terminal.IPTV combines television network, three fields of telephone network and the Internet effectively, is the most representative business of the integration of three networks, just is being subjected to industry and is more and more paying close attention to.
In the live television service of IPTV, the demand of preview is carried out in existence to direct broadcast band, it is the content of user's this channel of preview before certain channel is formally watched in decision, this can be when normally watching a channel content, content with another channel of mode preview of the little picture of picture-in-picture, or on screen, play the content of a plurality of channels simultaneously in the mode of little picture of tiling, so that the user selects a channel to watch.
In the IPTV system, because the channel of supporting is numerous, the access bandwidth resource-constrained of user terminal, not to adopt the mode that the media content of all channels all is sent to simultaneously user terminal, but only transmit the media content of the channel that the user watches to user terminal, and, for saving bandwidth, media streams of preview channel may need the independently Media Stream that adopts occupied bandwidth few, be same channel,, provide multiple Media Stream though channel content is identical, the Media Stream of normally watching and the Media Stream of preview, for example the Media Stream of preview channel adopts little picture, the bandwidth that takies is few.
In realizing process of the present invention, the inventor finds to exist in the prior art following shortcoming:
In the prior art, still do not support the scheme of IPTV band prebrowsing, IPTV user can't realize the preview to the channel media stream content.
Summary of the invention
The embodiment of the invention provides a kind of mthods, systems and devices of negotiation of media streams of preview channel, makes IPTV user realize the channel media stream content is carried out preview.
The embodiment of the invention provides a kind of method of negotiation of media streams of preview channel, may further comprise the steps:
Reception is from the negotiation of media streams of preview channel request of subscriber equipment;
Generate the negotiation of media streams of preview channel response according to described negotiation of media streams of preview channel request;
Described negotiation of media streams of preview channel response is sent to described subscriber equipment, make described subscriber equipment obtain media streams of preview channel according to described negotiation of media streams of preview channel response.
The embodiment of the invention provides a kind of system of negotiation of media streams of preview channel, comprises business control function body and subscriber equipment, wherein:
Described business control function body is used to receive the negotiation of media streams of preview channel request from described subscriber equipment; Generate the negotiation of media streams of preview channel response according to described negotiation of media streams of preview channel request; Described negotiation of media streams of preview channel response is sent to described subscriber equipment, make described subscriber equipment obtain media streams of preview channel according to described negotiation of media streams of preview channel response;
Described subscriber equipment is used for sending the negotiation of media streams of preview channel request to described business control function body; Reception is from the negotiation of media streams of preview channel response of described business control function body; Obtain media streams of preview channel according to described negotiation of media streams of preview channel response.
The embodiment of the invention provides a kind of business control function body, comprising:
Receiver module is used to receive the negotiation of media streams of preview channel request from subscriber equipment;
Generation module, the negotiation of media streams of preview channel request that is used for receiving according to described receiver module generates the negotiation of media streams of preview channel response;
Sending module, the negotiation of media streams of preview channel response that is used for described generation module is generated sends to described subscriber equipment.
The embodiment of the invention provides a kind of subscriber equipment, comprising:
Sending module is used for the negotiation of media streams of preview channel request that described generation module generates is sent to business control function body, comprises at least a band prebrowsing indication in the described negotiation of media streams of preview channel request;
Receiver module is used to receive the negotiation of media streams of preview channel response from described business control function body;
Acquisition module, media streams of preview channel is obtained in the negotiation of media streams of preview channel response that is used for receiving according to described receiver module.
In the embodiments of the invention,,, make IPTV user realize the channel media stream content is carried out preview to set up media streams of preview channel by carrying out negotiation of media streams of preview channel with subscriber equipment.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method flow diagram of a kind of negotiation of media streams of preview channel in the embodiment of the invention;
Fig. 2 is the method flow diagram of a kind of negotiation of media streams of preview channel in the embodiment of the invention;
Fig. 3 is the method flow diagram of a kind of negotiation of media streams of preview channel in the embodiment of the invention;
Fig. 4 is the method flow diagram of a kind of negotiation of media streams of preview channel in the embodiment of the invention;
Fig. 5 is the method flow diagram of a kind of negotiation of media streams of preview channel in the embodiment of the invention;
Fig. 6 is the system construction drawing of a kind of negotiation of media streams of preview channel in the embodiment of the invention;
Fig. 7 is a kind of business control function body structure chart in the embodiment of the invention;
Fig. 8 is a kind of user device architecture figure in the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention provides a kind of method of negotiation of media streams of preview channel, as shown in Figure 1, may further comprise the steps:
In the embodiments of the invention,,, make IPTV user realize the channel media stream content is carried out preview to set up media streams of preview channel by carrying out negotiation of media streams of preview channel with subscriber equipment.
The embodiment of the invention provides a kind of method of negotiation of media streams of preview channel, as shown in Figure 2, may further comprise the steps:
In this step, UE sends the negotiation of media streams of preview channel request to SCF, carries the band prebrowsing indication in the request message.
UE sends the negotiation of media streams of preview channel request two kinds of situations, a kind of situation is at LTV (LiveTelevision, send when live telecast) business initial is set up, in this case, the negotiation of media streams of preview channel request can be located in UE and set up in the request message to the LTV session that SCF sends, for example in the SIPInvite message; Another kind of situation is to send after the professional foundation of LTV is finished, and in this case, the negotiation of media streams of preview channel request is located in UE in the modification conversation request message that SCF sends, for example in the SIP Reinvite message.The previous case, set up in the process in the LTV business often, carry out negotiation of media streams of preview channel in advance, after LTV session foundation is finished, do not carry out band prebrowsing immediately, but after the request that receives the user, carry out band prebrowsing again, or set up in the LTV session and to finish, after negotiation of media streams of preview channel is finished simultaneously, carry out band prebrowsing immediately, be that the content of initially watching comprised band prebrowsing after LTV session foundation was finished; Latter event is watched the user often and is asked in the LTV business procedure to carry out band prebrowsing, after UE receives user's band prebrowsing request, sends the modification conversation message to SCF, carries the negotiation of media streams of preview channel request.
Among the present invention, the negotiation of media streams of preview channel request can be to carry in the SDP of sip message message body, specifically can carry in the SDP message body of SIP Invite message or SIP Reinvite message.
Band prebrowsing indication in the negotiation of media streams of preview channel request can be the indication of support channel preview, and for example, terminal can be indicated and be supported picture-in-picture band prebrowsing and mosaic channel preview.This can be to increase a kind of a property column to indicate in SDP.Example is as follows,
a＝iptv-bc-support:pip?mosaic
This shows that by this a property column, indication can be supported picture-in-picture (pip) and mosaic (mosaic) band prebrowsing.If picture-in-picture or mosaic channel preview are only supported in expression, example is as follows
a＝iptv-bc-support:pip
Or
a＝iptv-bc-support:mosaic
Band prebrowsing indication in the negotiation of media streams of preview channel request can be the preview channel indication of initially watching in the channel information.Initially watching channel is after negotiation of media streams is finished, UE at first enters the channel of watching, and after promptly UE receives the negotiation of media streams response message, just begins to receive and play corresponding Media Stream, do not need to wait for again that the user manually sends request, for example change platform request or preview request.Initially watch the information of channel can be capable by the m of SDP, c is capable, a=bc_service:BCServiceId is capable represents, carries the attribute (for example Media Stream type, encoding and decoding attribute) of Media Stream, the receiver address of Media Stream (for example multicast address of receiving media stream), channel identication respectively.
Initially watching the preview channel indication in the channel information can be to carry the preview channel sign in a=bc_service:BCServiceId is capable, preview channel sign wherein can be the preview versions that increases this channel of parametric representation on existing channel identication basis, corresponding, what also can increase this channel of parametric representation normally watches version, if not with such parameter, can be defaulted as is normally to watch version.For example, behind original channel identication, increase the media=xxx parameter, distinguish a plurality of versions of same channel by this parameter, promptly by behind same channel identication with different parameters, the content of representing these channels is identical, but belong to different versions, for example one be big picture normally watch version, another is the preview versions of little picture.
Below example be that a=bc_service:BCServiceId at SDP carries the channel identication of normally watching version and the channel identication of preview versions in capable, the channel that indication is initially watched is normally to watch channel or preview channel.
A=bc_service:＜tv:sztv1.sztv.com; Media=normal〉or
a＝bc_service:tv:sztv1.sztv.com
Normally watch version by what carry media=normal parametric representation channel, the default value of this parameter can be normally to watch version, if promptly do not carry this parameter just expression normally watch version (normally watching channel).
a＝bc_service:<tv:sztv?1.sztv.com；media＝preview>
By the preview versions (preview channel) that carries media=preview parametric representation channel.
Initially watching the preview channel indication in the channel information can also be initially to watch the attribute that increases the expression preview in the SDP of the channel description, and promptly channel identication is constant, and increasing the attribute representation is the preview versions of channel.
Following example is the attribute that increases the expression preview, the preview versions of expression channel.Be that a=bc_service:BCServiceId initially watches channel identication constant in capable, increase the preview versions of attribute representation's channel in addition.Consider that channel may corresponding a plurality of m capable (for example the m of video m capable and audio frequency is capable), introduce the group semanteme of a kind of new SDP here, indicate which m is capable to belong to a channel, and increase the property parameters of group, expression is a preview versions.
a＝bc_service:tv:sztv1.sztv.com
a＝bc_service:tv:cctv1.cctv.com
a＝group?Channel?12
a＝group?Channel?34media＝preview
m＝video?3400RTP/AVP?98
mid:1
m＝audio?3456RTP/AVP?97
mid:2
m＝video?3402RTP/AVP?98
mid:3
m＝audio?3458RTP/AVP?9796
mid:4
In this example, initially watch channel that two channels are arranged, channel identication is respectively tv:sztv1.sztv.com and tv:cctv1.cctv.com, and wherein mid is capable corresponding channel of m of 1 and 2, mid is capable corresponding another channel of m of 3 and 4, and correspondence is the preview versions of this channel.
Band prebrowsing indication in the negotiation of media streams of preview channel request can be the indication of preview channel business packet, be that preview channel is formed an independent business packet, independent preview channel business packet sign is arranged, and some normally watch channel to form other business packet, and other business packet sign is arranged.By the capable preview channel business packet sign of carrying of the a=bc_service_package in the SDP description, indication needs the support channel preview.Example is as follows, normally watches channel service bag sign normal-package and preview channel business packet sign preview-package to represent that this session needs the support channel preview by capable the carrying of a=bc_service_package of SDP.
a＝bc_service_package:normal-package
a＝bc_service_package:preview-package
Further, the a=bc_service_package of SDP is capable except that carrying preview channel business packet sign, can also carry the tabulation of preview channel sign.The preview channel sign here can adopt the above-mentioned mode that channel identication increases parameter of passing through.Example is as follows,
a＝bc_service_package:normal-package<tv:cctv1.cctv.com>，<tv:cctv2.cctv.com>，<tv:sztv1.sztv.com>，<tv:sztv2.sztv.com>
a＝bc_service_package:preview-package<tv:cctv1.cctv.com；media＝preview>，<tv:cctv2.cctv.com；media＝preview>，<tv:sztv1.sztv.com；media＝preview>，<tv:sztv2.sztv.com；media＝preview>
Here carry two business packet information rows respectively by two a=bc_service_package are capable, previous business packet is for normally watching the channel service bag, the business packet in back is the preview channel business packet, has carried the business packet sign in each business packet information row, and the channel identication tabulation.
Band prebrowsing indication in the negotiation of media streams of preview channel request can be to carry the preview channel identification list in existing business packet information row, be that preview channel is not formed independent business packet, preview channel with normally watch channel in a business packet, by carrying the preview channel identification list in the capable business packet information of the a=bc_service_package of SDP, indicate the follow-up channel that may need preview in this session.
Following example is to carry in the capable business packet information row of the a=bc_service_package of SDP normally to watch channel identication tabulation and preview channel identification list, and the preview channel sign here still adopts the mode of increase parameter behind the channel identication.
a＝bc_service_package:bc-package<tv:cctv1.cctv.com>，<tv:cctv2.cctv.com>，<tv:sztv1.sztv.com>，<tv:sztv2.sztv.com>，<tv:cctv1.cctv.com；media＝preview>，<tv:cctv2.cctv.com；media＝preview>，<tv:sztv1.sztv.com；media＝preview>，<tv:sztv2.sztv.com；media＝preview>
Band prebrowsing indication in the negotiation of media streams of preview channel request can also be the combination in any of above-mentioned indication, for example, initially watch in the channel information with in the business packet information and all carry the preview channel sign, or carry the indication of support channel preview and carry the preview channel identification list by business packet, or the like.
This combination examples is as follows, by a=iptv-bc-support line display support channel preview among the SDP, and by the capable preview channel identification list that carries of a=bc_service_package, represents the follow-up channel that may need to carry out preview of this session.
a＝iptv-bc-support:pip?mosaic
a＝bc_service_package:bc-package<tv:cctv1.cctv.com>，<tv:cctv2.cctv.com>，<tv:sztv1.sztv.com>，<tv:sztv2.sztv.com>，<tv:cctv1.cctv.com；media＝preview>，<tv:cctv2.cctv.com；media＝preview>，<tv:sztv1.sztv.com；media＝preview>，<tv:sztv2.sztv.com；media＝preview>
Following example is initially watched channel by capable the carrying of two a=bc_service of SDP, and the channel of initially watching has two channels, and one is normally to watch channel, and another is a preview channel, indicates regular channel and the preview channel of initially watching respectively.And by two capable business packet sign and channel identication tabulation and preview channel business packet sign and the preview channel identification list of normally watching, the regular channel and preview channels of indicating follow-up needs to watch respectively of carrying respectively of a=bc_service_package.
a＝bc_service:<tv:sztv1.sztv.com>
a＝bc_service:<tv:cctv1.cctv.com；media＝preview>
a＝bc_service_package:normal-package<tv:cctv1.cctv.com>，<tv:cctv2.cctv.com>，<tv:sztv1.sztv.com>，<tv:sztv2.sztv.com>
a＝bc_service_package:preview-package<tv:cctv1.cctv.com；media＝preview>，<tv:cctv2.cctv.com；media＝preview>，<tv:sztv1.sztv.com；media＝preview>，<tv:sztv2.sztv.com；media＝preview>
Band prebrowsing indication in the negotiation of media streams of preview channel request can also be the indication of implicit expression, does not promptly carry explicit indication, determines whether the support channel preview by SCF according to local policy.This can be all user's support channel preview of acquiescence, or determines whether support channel preview of user according to user's subscription data.For example, handle the LTV session of UE at SCF and set up in the process, SCF determines the support channel preview according to local policy, carries out the relevant treatment of band prebrowsing.
In the negotiation of media streams of preview channel request, further can carry the information of bandwidth demand, comprised support channel preview business in the bandwidth demand in interior maximum bandwidth, it is the demand that has comprised the band prebrowsing business during the maximum bandwidth of LTV business is calculated, for example, maximum bandwidth may be that the bandwidth that a big picture of normally watching needs adds the bandwidth (corresponding picture-in-picture band prebrowsing) that the little picture of a preview needs, or the maximum bandwidth demand is the bandwidth demand (corresponding mosaic channel preview) of several (for example 8) little pictures of preview.Especially, under the situation that the preview Media Stream is consulted in advance, initially watch the information that does not comprise preview channel in the channel information in the request message, but need the support channel preview, at this moment, the bandwidth demand of request is not only a bandwidth demand of initially watching channel, also need the bandwidth demand of preview channel is counted, for example bandwidth demand will satisfy the bandwidth demand of normally watching the channel Media Stream to add media streams of preview channel, and promptly the bandwidth demand of a big picture adds the bandwidth demand of a little picture.
The bandwidth demand of supposing big picture is 2048kbps, and the bandwidth demand of little picture is 500kbps.Can use the bandwidth demand of this session of b line display of SDP.Example is as follows.
b＝AS:2548
In the negotiation of media streams of preview channel request message, further can carry the network parameter of preview channel, for example the multicast address information of preview channel.Can take the network parameter of two kinds of preview channels, a kind of is at the network parameter of initially watching the preview channel in the channel information, and another kind is the preview channel network parameter in the business packet.Initially watching the preview channel network parameter in the channel information is after the preview negotiation of media streams is finished, UE at first needs the network parameter of the media streams of preview channel that receives, preview channel network parameter in the business packet is the follow-up network parameter that needs the channel of preview, the network parameter of the Media Stream that need obtain when for example the little picture of preview channel changes platform.Initially watch preview channel network parameter in the channel information can use the m of SDP capable, c is capable carries, preview channel network parameter in the business packet can use the business packet property column a=bc_service_package of SDP to carry, and for example carries the multicast address tabulation of each preview channel correspondence in the a=bc_service_package property column.
Following example is to use that the m of SDP is capable, the capable network parameter that carries the preview channel of initially watching of c, initially watch channel normally to watch the channel except that one, also comprise a preview channel, m capable (m capable have the m of video and audio frequency capable) carries the attribute of corresponding Media Stream, the capable address of carrying corresponding Media Stream of c.
a＝bc_service:<tv:sztv1.sztv.com>
a＝bc_service:<tv:cctv1.cctv.com；media＝preview>
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.1
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?225.1.1.2
a＝rtpmap:97AMR
a＝maxptime:20
m＝video?3402RTP/AVP?98
c＝IN?IP4225.1.1.3
a＝rtpmap:98H263
m＝audio?3458RTP/AVP?97?96
c＝IN?IP4?225.1.1.4
Following example is that preview channel is formed independently business packet, use capable the carrying respectively of a=bc_service_package of SDP normally to watch channel service package informatin and preview channel business packet information, except that carrying regular channel business packet sign and preview channel business packet sign, also carry and normally watch channel identication tabulation and preview channel identification list, and normally watch tabulation of channel network parameter and the tabulation of preview channel network parameter, be the multicast address tabulation here.
a＝bc_service_package:normal-package?multi-list:224.1.1.1-224.1.1.2，224.1.1.3-224.1.1.4，224.1.1.5-224.1.1.6，224.1.1.7-224.1.1.8<tv:cctv1.cctv.com>，<tv:cctv2.cctv.com>，<tv:sztv1.sztv.com>，<tv:sztv2.sztv.com>
a＝bc_service_pckage:preview-package?multi-list:225.1.1.1-225.1.1.2，225.1.1.3-225.1.1.4，225.1.1.5-225.1.1.6，225.1.1.7-225.1.1.8<tv:cctv1.cctv.com；media＝preview>，<tv:cctv2.cctv.com；media＝preview>，<tv:sztv1.sztv.com；media＝preview>，<tv:sztv2.sztv.com；media＝preview>
Following example is that preview channel is not formed independently business packet, normally watch channel and preview channel a business packet, the capable business packet information of carrying of a=bc_service_package by SDP, comprise the business packet sign, normally watch the network parameter tabulation of channel and preview channel, here be the multicast address tabulation, normally watch the channel identication tabulation of channel and preview channel.
a＝bc_service_package:bc-package?multi-list:224.1.1.1-224.1.1.2，224.1.1.3-224.1.1.4，224.1.1.5-224.1.1.6，224.1.1.7-224.1.1.8，225.1.1.1-225.1.1.2，225.1.1.3-225.1.1.4，225.1.1.5-225.1.1.6，225.1.1.7-225.1.1.8<tv:cctv1.cctv.com>，<tv:cctv2.cctv.com>，<tv:sztv1.sztv.com>，<tv:sztv2.sztv.com>，<tv:cctv1.cctv.com；media＝preview>，<tv:cctv2.cctv.com；media＝preview>，<tv:sztv1.sztv.com；media＝preview>，<tv:sztv2.sztv.com；media＝preview>
Some information of in the negotiation of media streams of preview channel request message, carrying, the information such as network parameter of business packet sign, channel identication, channel correspondence for example, can be that UE obtains from the EPG data that get access in advance, or obtain to SCF by sending query messages, for example send SIP Options message and obtain.
In this step, SCF receives the negotiation of media streams of preview channel request that UE sends, and after handling, sends the negotiation of media streams of preview channel response.
SCF can be after request message SIP Invite message or LTV session modification request message SIP Reinvite message are set up in the LTV session that receives UE, identifies to have comprised the negotiation of media streams of preview channel request.As previously mentioned, this also can be the band prebrowsing indication of implicit expression, be that SIP Invite message or the SIP Reinvite message that UE sends is not carried clear and definite band prebrowsing indication, SCF determines the preview of needs support channel according to local policy, for example, according to carrier policy, all support channel previews of LTV business of all users, or determine this user's support channel preview according to user's subscription data, thereby determining that the LTV session that receives is set up in request message or the LTV session modification request message has comprised the negotiation of media streams of preview channel request.SCF also can be that identification has comprised the negotiation of media streams of preview channel request according to the band prebrowsing indication of carrying in the request message.
After SCF identifies the negotiation of media streams of preview channel request, can carry out authentication to the user, judge whether the user has the authority of using the corresponding preview business of described negotiation of media streams of preview channel request mid band preview indication, return failure or successful negotiation of media streams of preview channel response.
Concrete authentication and information check are as follows.
If carried the indication of support channel preview in the request message, a=iptv-bc-support:pipmosaic for example, can determine whether the band prebrowsing business is carried out authentication according to carrier policy, authentication be inquired about this user data if desired, judge user's band prebrowsing business of whether having contracted, if, return failure response, can be the SIP conditional code message that 403 expressions are forbidden for not, and the description of the reason of portability text mode, user not signing band prebrowsing business is described.Further, can judge whether network side can provide the band prebrowsing business, if can not provide, this locates unacceptable failure response can to return 488 expressions, and the description of the reason of portability text mode, and not support channel preview business of network side is described.
Following mask body describes respectively at different preview channel indications.
If band prebrowsing is designated as the indication of support channel preview, a=iptv-bc-support:pipmosaic for example, business control function body judges according to carrier policy whether the user has the authority of using the band prebrowsing business, if judged result is for being, then in responding, carries described negotiation of media streams of preview channel the indication of identical support channel preview
If band prebrowsing is designated as preview channel sign, for example a=bc_service:＜tv:cctv1.cctv.com; Media=preview 〉, business control function body judges whether the user has the authority of the corresponding channel of the described preview channel of preview sign, if judged result is for being then to carry identical preview channel in described negotiation of media streams of preview channel response and identify.According to carrier policy, the different editions that can be channel is signatory separately, promptly normally watch version and preview versions signatory separately, carry out independent authentication, or do not distinguish the various version of channel, it is signatory to press channel, certain channel of promptly having contracted, then the user has the right to watch each version of this channel, for example normally watches version and preview versions.If this channel of user not signing returns failure response, can be the SIP conditional code response that 403 expressions are forbidden, and the description of the reason of portability text mode, this channel of user not signing is described.
If band prebrowsing is designated as the attribute of expression preview.A=group Channel 3 4media=preview for example, business control function body obtains corresponding channel identication according to mid, carry out authentication, business control function body judges according to carrier policy whether the user has the authority of the channel of the attribute correspondence that preview represents preview, if judged result is for being, then in responding, carries negotiation of media streams of preview channel the attribute of identical expression preview.If failed authentication returns the response of failure, for example 403 conditional codes response.
If band prebrowsing is designated as preview channel business packet sign, a=bc_service_package:preview-package for example, business control function body judges according to carrier policy whether the user has the authority of using described preview channel business packet sign corresponding service bag, if judged result is for being, then in described negotiation of media streams of preview channel response, carries identical preview channel business packet and identify.The strategy of operator is depended in the processing of concrete authentication, and for example, the preview channel business packet does not need signatory separately, only needs the signatory corresponding channel service bag of normally watching.If in the request message except preview channel business packet sign, also carried the preview channel identification list, SCF need check user contracting data, if there is the preview channel sign of user not signing in this tabulation, to from this tabulation, delete this preview channel sign in the message of returning, if preview channels all in should tabulating is all signatory, return failure response, for example 403 responses.If only carried preview channel business packet sign in the request message, do not carry the preview channel identification list, show that this session may need to use all preview channels in this business packet, be equivalent to carry in the request message tabulation of all preview channel signs in this business packet, carried out above-mentioned same processing.
If band prebrowsing is designated as the preview channel identification list, comprise in the channel identication tabulation of for example carrying in the a=bc_service_package property column of SDP and normally watch channel identication tabulation and preview channel identification list, judge according to carrier policy whether the user has the authority of any one channel in the described preview channel identification list of preview, if judged result is for being, in described negotiation of media streams of preview channel response, carry the preview channel identification list that the preview channel of having deleted user not signing identifies.If all channels in the tabulation are all not signatory, return failure response, for example 403 responses.
If described band prebrowsing is designated as the band prebrowsing indication of implicit expression, described business control function body judges according to carrier policy whether described user has the authority of using the band prebrowsing business, if judged result is for being, then in described negotiation of media streams of preview channel response, carries at least a band prebrowsing and indicate.
If carry bandwidth information in the negotiation of media streams of preview channel request, for example use among the SDP b property column b=AS:xxx of expression bandwidth demand, SCF need check this bandwidth demand maximum bandwidth whether UE need use in this session.SCF is according to whether having comprised the negotiation of media streams of preview channel request in the request message that identifies previously, the bandwidth demand that whether comprises media streams of preview channel when determining the computation bandwidth demand, if judged result is for being, then in responding, described negotiation of media streams of preview channel carries identical bandwidth information.For example the maximum bandwidth demand is that the channel Media Stream of normally watching of a big picture adds the bandwidth demand (corresponding picture-in-picture band prebrowsing) of the media streams of preview channel of a little picture, or the maximum bandwidth demand is the bandwidth demand (corresponding mosaic channel preview) of the media streams of preview channel of several little pictures.If the bandwidth demand of request is unreasonable, return 403 responses, carry the reason of text mode and describe, the bandwidth demand deficiency is described, or bandwidth demand exceeds the scope of permission too greatly.Therefore, during SCF computation bandwidth demand, be not only according to the information of initially watching channel, bandwidth demand is not only to satisfy the bandwidth demand of initially watching channel, also consider the bandwidth demand of other channels in the business packet and the bandwidth demand that media streams of preview channel needs, i.e. the maximum bandwidth demand that may need in this session.
If carry the network parameter of preview channel in the negotiation of media streams of preview channel request, for example use the m of SDP capable, the network parameter of the capable preview channel of initially watching that carries of c, and/or the preview channel network parameter in the business packet of carrying by multicast address tabulation in the capable business packet information of carrying of a=bc_service_package of SDP, check the correctness of network parameter, it is the whether network parameter of corresponding preview channel of network parameter, if judged result is for being, then in responding, described negotiation of media streams of preview channel carries identical parameter information.If the network parameter of the preview channel of initially watching is incorrect, return 403 responses, and the description of the reason of portability text mode, illustrate that network parameter is incorrect; If the network parameter in the business packet is incorrect, can in the message of returning, provide correct parameter.
After all inspections are passed through, SCF will return the negotiation of media streams of preview channel response message, carry corresponding information such as band prebrowsing indication in the message, and will be specific as follows.
If request message carries preview channel indication initially watching in the channel information, carry same preview channel indication in the response message.Particularly, if request message initially watches the a=bc_service of SDP of channel identication to carry the preview channel sign of initially watching in capable in expression, for example, a=bc_service:＜tv:cctv1.cctv.com; Media=preview 〉, comprise the capable preview channel sign of initially watching of carrying of same a=bc_service in the response message.If carry the attribute of expression preview in the request message, for example a=group carries the attribute of expression preview in capable, and it is capable to return same a=group in the response message, carries the preview attribute of initially watching channel.In addition, return in the response message with request message in the SDP m of network parameter of the consistent preview channel of initially watching capable, c is capable.
If carried preview channel business packet sign in the request message, for example the a=bc_service_package business packet property column of SDP carries preview channel business packet sign, also needs to carry same preview channel business packet sign in the response message.If except preview channel business packet sign, also carried the preview channel identification list in the request message, also carry the preview channel identification list in the response message, but the preview channel sign of deletion user not signing in the tabulation.If do not carry the preview channel identification list, can determine whether to carry the preview channel identification list according to carrier policy in the response message, comprise the preview channel sign that the user contracts in the tabulation.
If comprise the preview channel identification list in the business packet information that request message carries, for example the a=bc_service_package:bc-package of SDP carries the preview channel identification list in capable, also carry the preview channel identification list in the response message, the preview channel sign of deletion user not signing in the tabulation.Whether if do not comprise the preview channel identification list in the business packet information of request message, SCF also can carry the preview channel identification list in response message, carry and depend on carrier policy.If do not carry business packet information in the request message, can carry business packet information in the response message, comprise business packet sign and channel identication tabulation, wherein comprise the tabulation of preview channel sign in the channel identication tabulation.
If do not carry any business packet information in the request message, do not carry preview channel business packet information yet, if SCF judges the preview of user's support channel, then can carry business packet information in the response message, comprise preview channel business packet information.For example, if carried the indication (for example a=iptv-bc-support:pip mosaic) of support channel preview in the request message, but do not carry business packet information, SCF carries the indication of support channel preview in response message, and can carry preview channel business packet information simultaneously, comprise preview channel business packet sign, further can comprise the preview channel identification list.
If carried bandwidth demand in the request message, return same bandwidth demand in the response message.If do not carry bandwidth demand in the request message, can carry the maximum bandwidth demand that SCF calculates in the response message, comprised the bandwidth demand of media streams of preview channel.For example, that carries in the request message initially watches channel for normally watching channel, do not comprise the preview channel sign of initially watching, but carried the indication of support channel preview, for example support the picture-in-picture band prebrowsing, then SCF is when computation bandwidth, satisfy one and normally watch channel to add that a preview watches the bandwidth demand of the Media Stream of channel.
If carried the network parameter of preview channel in the request message, carry corresponding network parameter in the response message.Particularly, if the c by SDP is capable in the request message, the capable network parameter that carries the preview channel of initially watching of m, carry in the response message that same c is capable, m is capable, to carry the network parameter of the preview channel of initially watching.If carried the network parameter tabulation of preview channel in the a=bc_service_package business packet property column of the SDP of request message, specifically be the multicast address tabulation, carry same multicast address tabulation in the response message.
In this step, after UE receives the negotiation of media streams of preview channel response of success, send the request of obtaining media streams of preview channel to ECF/EFF, for example IGMP Join request, and receive the media streams of preview channel that ECF/EFF sends, play output.
UE sends the request of obtaining media streams of preview channel to ECF/EFF two kinds of situations, and a kind of situation is promptly to initiate after negotiation of media streams of preview channel is finished, and promptly initiates after receiving the negotiation of media streams of preview channel response message.Another kind of situation, after negotiation of media streams of preview channel was finished, UE did not send the request of obtaining media streams of preview channel, but sent when band prebrowsing is carried out in user's request again.This situation is exactly to finish negotiation of media streams of preview channel in advance, normally watch in the TV programme process the user, UE receives user's band prebrowsing request, because finished the negotiation of media streams of preview channel in advance, do not need to carry out the negotiation of media streams of preview channel, UE directly sends the request of obtaining media streams of preview channel to ECF/EFF again.
As previously mentioned, UE initiates negotiation of media streams of preview channel two kinds of situations, a kind of situation is that the IPTV live broadcast service is initiated when setting up, when setting up, the IPTV live broadcast service may need to set up simultaneously band prebrowsing, or carry out the negotiation of media streams of preview channel in advance, wait for that follow-up user asks to carry out band prebrowsing; Another kind of situation is that the IPTV live broadcast service does not carry out the negotiation of media streams of preview channel when setting up, but initiates after the user sets up the request of band prebrowsing receiving, and promptly watches in the live television programming process the user, and band prebrowsing is carried out in request.
Like this, the foundation of concrete media streams of preview channel has 3 kinds of modes.
Mode 1, when setting up, the LTV business sets up band prebrowsing, be that the LTV business initial (is for example set up in the process, send the LTV session and set up request), carry out the negotiation of media streams of preview channel, after finishing, (finishes simultaneously) negotiation of media streams of preview channel with professional foundation of LTV, UE sends the request of obtaining Media Stream to ECF/EFF, for example comprise media streams of preview channel and normally watch channel Media Stream (corresponding picture-in-picture band prebrowsing), or including only media streams of preview channel (corresponding mosaic channel preview), UE plays output after receiving Media Stream.
Mode 2, when setting up, the LTV business carries out the negotiation of media streams of preview channel in advance, be that the LTV business initial is set up in the process, carry out the negotiation of media streams of preview channel, but after finishing, (finishes simultaneously) negotiation of media streams of preview channel with professional foundation of LTV, UE does not send the request of obtaining media streams of preview channel to ECF/EFF immediately, but watch in the process in the LTV business, UE (for example receives after user's the request of setting up band prebrowsing, picture-in-picture band prebrowsing or mosaic channel preview are set up in user's request), the request of media streams of preview channel is obtained in transmission, and UE plays output after receiving Media Stream.
Mode 3, the LTV business is watched and is set up band prebrowsing in the process, be that the LTV business initial is set up in the process, do not carry out the negotiation of media streams of preview channel, but watch in the process in the LTV business, UE (for example receives after user's the request of setting up band prebrowsing, picture-in-picture preview or mosaic preview are set up in user's request), UE (for example sends the negotiation of media streams of preview channel request to SCF, in the request of revising session, carry), after negotiation of media streams of preview channel was finished, UE sent the request of obtaining media streams of preview channel to ECF/EFF again, and UE plays output after receiving media streams of preview channel.
Mode 1 and mode 3, in the negotiation of media streams of preview channel request, the preview channel information of initially watching by initially watching channel information to carry, after UE receives the negotiation of media streams of preview channel response, send the request of obtaining corresponding media streams of preview channel to ECF/EFF, receive the Media Stream of preview channel and play output.
Mode 2, do not carry the preview channel information of initially watching in the negotiation of media streams of preview channel request, after UE receives the negotiation of media streams of preview channel response, do not send the request of obtaining media streams of preview channel, after band prebrowsing is set up in user's request, UE sends the request of obtaining media streams of preview channel to ECF/EFF again, receives media streams of preview channel and plays output.
In addition, the user can ask preview channel to change platform in the band prebrowsing process, UE receives and sends the request of changing media streams of preview channel to ECF/EFF after preview channel changes the platform request, for example IGMPLeave/Join message receives new media streams of preview channel, and plays output.
ECF/EFF can carry out authentication to the user after receiving the request of obtaining media streams of preview channel of UE transmission, judges whether the user has the right to receive this media streams of preview channel.ECF/EFF obtains such user right information dual mode, and a kind of setting in advance among the ECF/EFF for example is provided with in user's signing service process; Another kind of mode is in the negotiation of media streams of preview channel process, ECF/EFF dynamically obtains the media streams of preview channel information of this session, in the time of specifically can being negotiation of media streams of preview channel request message and response message through Core IMS, Core IMS be issued to ECF/EFF by RACS with user's authority information.
In the embodiments of the invention,,, make IPTV user realize the channel media stream content is carried out preview to set up media streams of preview channel by between business control function body and subscriber equipment, carrying out negotiation of media streams of preview channel.
The embodiment of the invention provides a kind of method of negotiation of media streams of preview channel, as shown in Figure 3, may further comprise the steps:
Step 301, UE sends the LTV session and sets up request message SIP Invite message, carrying the indication of support channel preview in the message, specifically is a property column a=iptv-bc-support:pip mosaic in the SDP message body here, and picture-in-picture band prebrowsing and mosaic channel preview are supported in indication.And carry the maximum bandwidth demand that this IPTV session need be used, here be b=AS:2548, expression maximum bandwidth demand is 2548kbps, is the bandwidth demand (for 500kbps) that a bandwidth demand (2048kbps) of normally watching channel adds a preview channel.Also carry in the message set up the LTV business initially watch information such as channel and LTV business packet, here the channel identication of initially watching is tv:cctv1.cctv.com, and, c capable the carry network parameter of initially watching channel capable by m, the business packet sign of carrying is bc-pacakge, does not carry the channel identication tabulation and the multicast address tabulation of business packet.Note initially watching channel to have only one normally to watch channel here, only need 2048kbps, the bandwidth that request is reserved is 2548kbps, has reserved the bandwidth of band prebrowsing.The SIP Invite message that sends is roughly as follows.
INVITE?sip:IPTV.ctc.com?SIP/2.0
Max-Forwards:70
P-Preferred-Identity:<sip:user1_public1@ctc.com>
From:<sip:user1_public1@ctc.com>；tag＝171828
To:<sip:IPTV.ctc.com>
Call-ID:cb03a0s09a2sdfglkj490333
Cseq:127INVITE
Supported:100rel
Contact:<sip:[129.1.1.1]:1357>
Allow:INVITE，ACK，CANCEL，BYE，PRACK，UPDATE，REFER，MESSAGE
Content-Type:application/sdp
Content-Length:(...)
v＝0
o＝-2987933615?2987933615
s＝-
t＝0?0
a＝iptv-bc-support:pip?mosaic
a＝bc_service:<tv:cctv1.cctv.com>
a＝bc_service_package:bc-pacakge
b＝AS:2548
m＝video?3400RTP/AVP?98
c＝IN?IP4?224.1.1.1
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?224.1.1.2
a＝rtpmap:97AMR
a＝maxptime:20
Step 302, after SCF receives this SIP Invite message, indication a=iptv-bc-support:pip mosaic according to support channel preview in the SDP message body, identification needs the support channel preview, judge that network side can provide the band prebrowsing business, and providing to all users does not need signatory in addition business, so the indication of this support channel preview in the request message is rational.SCF comprises the bandwidth of band prebrowsing when calculating the maximum bandwidth demand of this session, here be the bandwidth (specifically being 500kbps here) that a bandwidth (specifically being 2048kbps here) of normally watching channel adds a preview channel, be total to 2548kbps, SCF checks the bandwidth demand b=AS:2548 that carries in the request message, is rational bandwidth demand.SCF checks the business packet sign bc-pacakge that carries in the request message, and the inquiring user subscription data be the business packet that the active user has contracted, and comprises in the business packet and normally watch channel and preview channel.Here, according to service deployment, user right dynamically obtains among the ECF/EFF, therefore SCF will carry channel identication tabulation and the multicast address tabulation in this business packet in response message, comprising the tabulation of preview channel sign and the multicast address tabulation of preview channel, this is to increase media=preview parametric representation preview channel sign behind channel identication.After SCF passes through request message SIP Invite message inspection, response message SIP 200 message that return success, wherein carry the interior channel identication tabulation and the multicast address tabulation of indication, bandwidth demand, business packet sign and business packet of support channel preview and (suppose that here this business is surrounded by 4 channels, each channel has one normally to watch version and a preview versions, therefore, 8 channel identications are specifically arranged), the channel identication tabulation here is exactly the channel that the user can watch in this session, specifically comprises channel and the preview channel that can normally watch.SIP 200 response messages are roughly as follows.
SIP/2.0200OK
Max-Forwards:70
P-Preferred-Identity:<sip:user1_public1@ctc.com>
From:<sip:user1_public1@ctc.com>；tag＝171828
To:<SIP:IPTV.ctc.com.cn>；tag＝666666
Call-ID:cb03a0s09a2sdfglkj490333
Cseq:127INVITE
Supported:100rel
Contact:<sip:IPTV.ctc.com>
Allow：INVITE，ACK，CANCEL，BYE，PRACK，UPDATE，REFER，MESSAGE
Content-Type:application/sdp
Content-Length:(...)
v＝0
o＝-2987933615?2987933615
s＝-
t＝0?0
a＝iptv-bc-support:pip?mosaic
a＝bc_service:<tv:cctv1.cctv.com>
b＝AS:2548
a＝bc_service_package:bc-pacakge?multi-list:224.1.1.1-224.1.1.2，224.1.1.3-224.1.1.4，224.1.1.5-224.1.1.6，224.1.1.7-224.1.1.8，225.1.1.1-225.1.1.2，225.1.1.3-225.1.1.4，225.1.1.5-225.1.1.6，225.1.1.7-225.1.1.8<tv:cctv1.cctv.com>，<tv:cctv2.cctv.com>，<tv:sztv1.sztv.com>，<tv:sztv2.sztv.com>，<tv:cctv1.cctv.com；media＝preview>，<tv:cctv2.cctv.com；media＝preview>，<tv:sztv1.sztv.com；media＝preview>，<tv:sztv2.sztv.com；media＝preview>
m＝video?3400RTP/AVP?98
c＝IN?IP4?224.1.1.1
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?224.1.1.2
a＝rtpmap:97AMR
a＝maxptime:20
Step 303 after UE receives SIP 200 response messages, sends IGMP Join message to ECF/EFF, to obtain the Media Stream of the channel of initially watching, is the Media Stream of tv:cctv1.cctv.com correspondence here, is the Media Stream of the channel normally watched.
Step 304, ECF/EFF checks that this user has the authority of obtaining this Media Stream, sends corresponding Media Stream to this UE, is the Media Stream of the channel normally watched.The user enters normal LTV program viewing.
Step 305, in LTV program viewing process, band prebrowsing is carried out in user's request, and for example the picture-in-picture band prebrowsing after UE receives user's band prebrowsing request, sends IGMP Join message to ECF/EFF, to obtain the Media Stream of preview channel.
Step 306, ECF/EFF checks that this user has the authority of obtaining this Media Stream, sends corresponding Media Stream to this UE, is the Media Stream of preview channel.
In the embodiments of the invention,,, make IPTV user realize the channel media stream content is carried out preview to set up media streams of preview channel by between controlled function entity and subscriber equipment, carrying out negotiation of media streams of preview channel.Specifically be that the LTV business is carried out the negotiation of media streams of preview channel when setting up in advance, watch in the process, when band prebrowsing is carried out in user's request, obtain media streams of preview channel again and play output in the LTV business.
The embodiment of the invention provides a kind of method of negotiation of media streams of preview channel, as shown in Figure 4, may further comprise the steps:
Step 401, UE sends SIP Invite request message, and the LTV session is set up in request.Carry the information of the preview channel of initially watching in the message, comprise by 4 capable 4 preview channel signs and corresponding capable, capable network parameters that carry of m of c that carry of a=bc_service.And carry the maximum bandwidth demand that this LTV session need be used, here be b=AS:2548, expression maximum bandwidth demand is 2548kbps, is the bandwidth demand (for 500kbps) that a bandwidth demand (2048kbps) of normally watching channel adds a preview channel.What attention was initially watched here is 4 preview channels, only needs 500*4=2000kbps, and the bandwidth of reservation is the maximum bandwidth of band prebrowsing.Also carry the business packet sign bc-preview-pacakge that the business packet of normally watching channel identifies bc-normal-pacakge and preview channel in the message, do not carried the channel identication tabulation and the multicast address tabulation of business packet.The SIP Invite message that sends is roughly as follows.
INVITE?sip:IPTV.ctc.com?SIP/2.0
...
Content-Type:application/sdp
...
a＝bc_service:<tv:cctv1.cctv.com；media＝preview>
a＝bc_service:<tv:cctv2.cctv.com；media＝preview>
a＝bc_service:<tv:cctv3.cctv.com；media＝preview>
a＝bc_service:<tv:cctv4.cctv.com；media＝preview>
a＝bc_service_package:bc-normal-pacakge
a＝bc_service_package:bc-preview-pacakge
b＝AS:2548
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.1
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4225.1.1.2
a＝rtpmap:97AMR
a＝maxptime:20
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.3
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?225.1.1.4
a＝rtpmap:97AMR
a＝maxptime:20
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.5
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?225.1.1.6
a＝rtpmap:97AMR
a＝maxptime:20
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.7
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?225.1.1.8
a＝rtpmap:97AMR
a＝maxptime:20
Step 402 is after IPTV SCF receives this SIP Invite message, according to a=bc_service:＜tv:cctv1.cctv.com; Media=preview〉etc. the preview channel of initially the watching sign of carrying, identification needs the support channel preview, judge that network side can provide the band prebrowsing business, and judge user's these channels of having contracted, so the indication of the preview channel that these 4 are initially watched in request message sign is rational.SCF comprises the bandwidth of band prebrowsing when calculating the maximum bandwidth demand of this session, here be the bandwidth (specifically being 500kbps here) that a bandwidth (specifically being 2048kbps here) of normally watching channel adds a preview channel, be total to 2548kbps, SCF checks the bandwidth demand b=AS:2548 that carries in the request message, is rational bandwidth demand.SCF checks business packet sign bc-normal-pacakge and the bc-preview-pacakge that carries in the request message, and the inquiring user subscription data is the signatory business packet of this user.Here, according to service deployment, user right is pre-configured among the ECF/EFF, so SCF does not carry channel identication tabulation and multicast address tabulation in this business packet in response message.After SCF passed through request message SIP Invite message inspection, response message SIP 200 message that return success were wherein carried the same preview channel information of initially watching, and comprised preview channel sign and network parameter, bandwidth demand, business packet sign.SIP 200 response messages are roughly as follows.
SIP/2.0200OK
...
Content-Type:application/sdp
...
a＝bc_service:<tv:cctv1.cctv.com；media＝preview>
a＝bc_service:<tv:cctv2.cctv.com；media＝preview>
a＝bc_service:<tv:cctv3.cctv.com；media＝preview>
a＝bc_service:<tv:cctv4.cctv.com；media＝preview>
a＝bc_service_package:bc-normal-pacakge
a＝bc_service_package:bc-preview-pacakge
b＝AS:2548
m＝video?3400RTP/AVP?98
c＝IN?IP4225.1.1.1
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?225.1.1.2
a＝rtpmap:97AMR
a＝maxptime:20
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.3
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?225.1.1.4
a＝rtpmap:97AMR
a＝maxptime:20
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.5
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?225.1.1.6
a＝rtpmap:97AMR
a＝maxptime:20
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.7
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?225.1.1.8
a＝rtpmap:97AMR
a＝maxptime:20
Step 403 after UE receives SIP 200 response messages, sends IGMP Join message, to obtain the Media Stream of the preview channel of initially watching, is tv:cctv1.cctv.com here; The Media Stream of 4 preview channel correspondences such as media=preview.
Step 404, ECF/EFF checks that this user has the authority of obtaining these Media Streams, sends corresponding Media Stream to this UE, is the Media Stream of 4 preview channel correspondences here, enters the mosaic band prebrowsing of 4 pictures.
In the embodiments of the invention,, set up media streams of preview channel, make IPTV user realize the channel media stream content is carried out preview by between business control function body and subscriber equipment, carrying out negotiation of media streams of preview channel.Here specifically be to set up in the LTV business to carry out negotiation of media streams of preview channel in the process, directly enter band prebrowsing after the professional foundation of LTV is finished.
The embodiment of the invention provides a kind of method of negotiation of media streams of preview channel, as shown in Figure 5, may further comprise the steps:
Step 501, UE sends SIP Invite request message, and the LTV session is set up in request.This is that request is set up in a common LTV session, does not consult media streams of preview channel.The information of initially watching channel of carrying in the message is for normally watching the information of channel.The bandwidth demand that carries for the maximum bandwidth demand of normally watching channel to need, is b=AS:2048 here, and expression maximum bandwidth demand is 2048kbps.Also carry the business packet sign bc-normal-package that normally watches channel in the message, do not carried the channel identication tabulation and the multicast address tabulation of business packet.The SIP Invite message that sends is roughly as follows.
INVITE?sip:IPTV.ctc.com?SIP/2.0
...
Content-Type:application/sdp
...
a＝bc_service:<tv:cctv1.cctv.com>
a＝bc_service_package:bc-normal-pacakge
b＝AS:2048
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.1
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4225.1.1.2
a＝rtpmap:97AMR
a＝maxptime:20
Step 502, after the SCF treatment S IP Invite message, the response that returns success,
Step 503 after UE receives response, is obtained to ECF/EFF and normally to be watched the channel Media Stream and to play output.
Step 504, UE receives after user request sets up the request of picture-in-picture band prebrowsing, sends the SIP reinvite request message of revising session.Carry the channel information of initially watching in the message, comprise the information of information of normally watching channel of initially watching and the preview channel of initially watching here, comprise that the preview channel sign (specifically is tv:sztv1.sztv.com here; Media=preview) and corresponding c is capable, the network parameter of the capable preview channel that carries of m.Carrying new bandwidth demand in the message, is b=AS:2548 here, is the bandwidth demand that comprises preview channel, specifically is the bandwidth demand (being assumed to 500kbps) that a bandwidth demand (being assumed to 2048kbps) of normally watching channel adds a preview channel.Except that the business packet sign of normally watching channel, also carry the business packet sign bc-preview-pacakge of preview channel in the message.
REINVITE?sip:IPTV.ctc.com?SIP/2.0
...
Content-Type:application/sdp
Content-Length:(...)
v＝0
o＝-29879336152987933615
s＝-
t＝0?0
a＝bc_service:<tv:cctv1.cctv.com>
a＝bc_service:<tv:sztv1.sztv.com；media＝preview>
a＝bc_service_package:bc-normal-pacakge
a＝bc_service_package:bc-preview-pacakge
b＝AS:2548
m＝video?3400RTP/AVP?98
c＝IN?IP4?224.1.1.1
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?224.1.1.2
a＝rtpmap:97AMR
a＝maxptime:20
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.1
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?225.1.1.2
a＝rtpmap:97AMR
a＝maxptime:20
Step 505, SCF passes through a=bc_service:＜tv:sztv1.sztv.com after receiving this SIP reinvite request message; Media=preview〉preview channel of initially the watching sign of carrying, being identified as needs the support channel preview.Check whether this user has the authority of band prebrowsing, and judge whether the authority of the preview channel that this is initially watched.And check whether the preview channel in the preview channel business packet of carrying all is the channel that the user has the right to watch.Check whether the bandwidth demand in the request message is reasonably maximum bandwidth demand, here SCF identifies needs the support channel preview, when calculating the maximum bandwidth demand, the bandwidth demand that comprises media streams of preview channel, be one and normally watch the bandwidth demand (supposition 2048kbps) of channel to add the bandwidth demand (supposition 500kbps) of a preview channel, so judge that the bandwidth demand of request is reasonable.After all inspections are passed through, the response message that SCF returns success, SIP 200 response messages.Carry the same channel information of initially watching (comprising preview channel information) in the message, business packet information comprises preview channel business packet sign, and bandwidth demand.Response message is roughly as follows.
SIP/2.0200OK
...
Content-Type:application/sdp
Content-Length:(...)
v＝0
o＝-29879336152987933615
s＝-
t＝0?0
a＝bc_service:<tv:cctv1.cctv.com>
a＝bc_service:<tv:sztv1.sztv.com；media＝preview>
a＝bc_service_package:bc-normal-pacakge
a＝bc_service_package:bc-preview-pacakge
b＝AS:2548
m＝video?3400RTP/AVP?98
c＝IN?IP4?224.1.1.1
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?224.1.1.2
a＝rtpmap:97AMR
a＝maxptime:20
m＝video?3400RTP/AVP?98
c＝IN?IP4?225.1.1.1
a＝rtpmap:98H263
m＝audio?3456RTP/AVP?97
c＝IN?IP4?225.1.1.2
a＝rtpmap:97AMR
a＝maxptime:20
Step 506 after UE receives SIP 200 response messages, sends IGMP Join message to ECF/EFF, to obtain the Media Stream of the preview channel of initially watching, is tv:sztv1.sztv.com here; The Media Stream of media=preview correspondence.
Step 507, ECF/EFF checks that this user has the authority of obtaining this Media Stream, sends corresponding Media Stream to this UE, is media streams of preview channel here, enters the picture-in-picture band prebrowsing.
In the embodiments of the invention,, set up media streams of preview channel, make IPTV user realize the channel media stream content is carried out preview by between business control function body and subscriber equipment, carrying out negotiation of media streams of preview channel.Specifically be the LTV session set up finish after, in watching the LTV business procedure, receive user's the request of band prebrowsing after, initiate the negotiation of media streams of preview channel request, to enter band prebrowsing.
The embodiment of the invention provides a kind of system of negotiation of media streams of preview channel, as shown in Figure 6, comprises business control function body 601 and subscriber equipment 602, wherein:
Described business control function body 601 is used to receive the negotiation of media streams of preview channel request from described subscriber equipment 602; Generate the negotiation of media streams of preview channel response according to described negotiation of media streams of preview channel request; Described negotiation of media streams of preview channel response is sent to described subscriber equipment 602, make described subscriber equipment 602 obtain media streams of preview channel according to described negotiation of media streams of preview channel response;
Described subscriber equipment 602 is used for sending the negotiation of media streams of preview channel request to described business control function body 601; Reception is from the negotiation of media streams of preview channel response of described business control function body 601; Obtain media streams of preview channel according to described negotiation of media streams of preview channel response.
In the embodiments of the invention, by a kind of system of negotiation of media streams of preview channel is provided, between business control function body and subscriber equipment, carry out negotiation of media streams of preview channel,, make IPTV user realize the channel media stream content is carried out preview to set up media streams of preview channel.
The embodiment of the invention provides a kind of business control function body, as shown in Figure 7, comprising:
Sending module 703 is used for the negotiation of media streams of preview channel response that described generation module 702 generates is sent to described UE.
Wherein, described user has the authority of using the corresponding preview business of described negotiation of media streams of preview channel request mid band preview indication, and described generation module 702 comprises:
Band prebrowsing indication processing sub 704 is used for carrying corresponding band prebrowsing indication in described negotiation of media streams of preview channel response.
Wherein, carry bandwidth information in the described negotiation of media streams of preview channel request, described bandwidth is the maximum bandwidth that described subscriber equipment need use under the prerequisite of support channel preview, and described generation module 702 comprises:
Bandwidth information processing sub 705 is used for carrying identical bandwidth information at described negotiation of media streams of preview channel;
Wherein, carry the network parameter of preview channel in the described negotiation of media streams of preview channel request, the network parameter of described preview channel is correct, and described generation module 702 comprises:
Network parameter processing sub 706 is used for carrying identical network parameter information at described negotiation of media streams of preview channel.
In the embodiments of the invention, by a kind of business control function body is provided, between controlled function entity and subscriber equipment, carry out negotiation of media streams of preview channel,, make IPTV user realize the channel media stream content is carried out preview to set up media streams of preview channel.
The embodiment of the invention provides a kind of subscriber equipment, as shown in Figure 8, comprising:
Sending module 801 is used for sending the negotiation of media streams of preview channel request to business control function body, comprises at least a band prebrowsing indication in the described negotiation of media streams of preview channel request;
In the embodiments of the invention,, between business control function body and subscriber equipment, carry out negotiation of media streams of preview channel,, make IPTV user realize the channel media stream content is carried out preview to set up media streams of preview channel by a kind of subscriber equipment is provided.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform, based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1, a kind of method of negotiation of media streams of preview channel is characterized in that, comprising:
Reception is from the negotiation of media streams of preview channel request of subscriber equipment;
Generate the negotiation of media streams of preview channel response according to described negotiation of media streams of preview channel request;
Described negotiation of media streams of preview channel response is sent to described subscriber equipment, make described subscriber equipment obtain media streams of preview channel according to described negotiation of media streams of preview channel response.
2, the method for claim 1 is characterized in that, described response comprises according to described negotiation of media streams of preview channel request generation negotiation of media streams of preview channel:
Described user has the authority of using the corresponding preview business of described negotiation of media streams of preview channel request mid band preview indication, carries corresponding band prebrowsing indication in described negotiation of media streams of preview channel response.
3, method as claimed in claim 2 is characterized in that, described band prebrowsing indication of carrying correspondence in described negotiation of media streams of preview channel response comprises:
Described band prebrowsing is designated as the indication of support channel preview, carries the indication of identical support channel preview in described negotiation of media streams of preview channel response; Perhaps
Described band prebrowsing is designated as the preview channel sign, carries identical preview channel sign in described negotiation of media streams of preview channel response; Perhaps
Described band prebrowsing is designated as the attribute of expression preview, carries the attribute of identical expression preview in described negotiation of media streams of preview channel response; Perhaps
Described band prebrowsing is designated as preview channel business packet sign, carries identical preview channel business packet sign in described negotiation of media streams of preview channel response; Perhaps
Described band prebrowsing is designated as the preview channel identification list, carries the preview channel identification list of the preview channel sign of having deleted user not signing in described negotiation of media streams of preview channel response; Perhaps
Described band prebrowsing is designated as the band prebrowsing indication of implicit expression, carries at least a band prebrowsing indication in described negotiation of media streams of preview channel response.
4, the method for claim 1 is characterized in that, described response comprises according to described negotiation of media streams of preview channel request generation negotiation of media streams of preview channel:
Carry bandwidth information in the described negotiation of media streams of preview channel request, described bandwidth is the maximum bandwidth that described subscriber equipment need use under the prerequisite of support channel preview, carries identical bandwidth information in described negotiation of media streams of preview channel response; Perhaps
Carry the network parameter of preview channel in the described negotiation of media streams of preview channel request, the network parameter of described preview channel is correct, carries identical parameter information in described negotiation of media streams of preview channel response.
5, the method for claim 1 is characterized in that, described reception comprises from the negotiation of media streams of preview channel request of subscriber equipment:
Receive the negotiation of media streams of preview channel request from described subscriber equipment when the LTV business initial is set up, described negotiation of media streams of preview channel request is arranged in the request message that LTV sets up session; Perhaps
Receive the negotiation of media streams of preview channel request from described subscriber equipment after the professional foundation of LTV is finished, described negotiation of media streams of preview channel request is arranged in the request message of revising session.
6, a kind of system of negotiation of media streams of preview channel is characterized in that, comprises business control function body and subscriber equipment, wherein:
Described business control function body is used to receive the negotiation of media streams of preview channel request from described subscriber equipment; Generate the negotiation of media streams of preview channel response according to described negotiation of media streams of preview channel request; Described negotiation of media streams of preview channel response is sent to described subscriber equipment, make described subscriber equipment obtain media streams of preview channel according to described negotiation of media streams of preview channel response;
Described subscriber equipment is used for sending the negotiation of media streams of preview channel request to described business control function body; Reception is from the negotiation of media streams of preview channel response of described business control function body; Obtain media streams of preview channel according to described negotiation of media streams of preview channel response.
7, a kind of business control function body is characterized in that, comprising:
Receiver module is used to receive the negotiation of media streams of preview channel request from subscriber equipment;
Generation module, the negotiation of media streams of preview channel request that is used for receiving according to described receiver module generates the negotiation of media streams of preview channel response;
Sending module, the negotiation of media streams of preview channel response that is used for described generation module is generated sends to described subscriber equipment.
8, business control function body as claimed in claim 7 is characterized in that, described user has the authority of using the corresponding preview business of described negotiation of media streams of preview channel request mid band preview indication, and described generation module comprises:
Band prebrowsing indication processing sub is used for carrying corresponding band prebrowsing indication in described negotiation of media streams of preview channel response.
9, business control function body as claimed in claim 7, it is characterized in that, carry bandwidth information in the described negotiation of media streams of preview channel request, described bandwidth is the maximum bandwidth that described subscriber equipment need use under the prerequisite of support channel preview, and described generation module comprises:
The bandwidth information processing sub is used for carrying identical bandwidth information in described negotiation of media streams of preview channel response.
10, business control function body as claimed in claim 7 is characterized in that, carries the network parameter of preview channel in the described negotiation of media streams of preview channel request, and the network parameter of described preview channel is correct, and described generation module comprises:
The network parameter processing sub is used for carrying identical network parameter information in described negotiation of media streams of preview channel response.
11, a kind of subscriber equipment is characterized in that, comprising:
Sending module is used for sending the negotiation of media streams of preview channel request to business control function body, comprises at least a band prebrowsing indication in the described negotiation of media streams of preview channel request;
Receiver module is used to receive the negotiation of media streams of preview channel response from described business control function body;
Acquisition module, media streams of preview channel is obtained in the negotiation of media streams of preview channel response that is used for receiving according to described receiver module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102120642A CN101677396B (en) | 2008-09-16 | 2008-09-16 | Method, system and device for negotiation of media streams of preview channel |
| PCT/CN2009/073749 WO2010031309A1 (en) | 2008-09-16 | 2009-09-04 | Method, system and device of negotiation of a previewing channel media stream |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102120642A CN101677396B (en) | 2008-09-16 | 2008-09-16 | Method, system and device for negotiation of media streams of preview channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101677396A true CN101677396A (en) | 2010-03-24 |
| CN101677396B CN101677396B (en) | 2011-07-20 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102120642A Expired - Fee Related CN101677396B (en) | 2008-09-16 | 2008-09-16 | Method, system and device for negotiation of media streams of preview channel |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101677396B (en) |
| WO (1) | WO2010031309A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012079495A1 (en) * | 2010-12-14 | 2012-06-21 | 中兴通讯股份有限公司 | Method and system for realizing mosaic television services |
| CN112087665A (en) * | 2020-09-17 | 2020-12-15 | 掌阅科技股份有限公司 | Previewing method of live video, computing equipment and computer storage medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI574558B (en) * | 2011-12-28 | 2017-03-11 | 財團法人工業技術研究院 | Method and player for rendering condensed streaming content |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100551037C (en) * | 2005-12-29 | 2009-10-14 | 腾讯科技（深圳）有限公司 | A kind of method and system of content preview of streaming media |
| CN100551045C (en) * | 2007-08-20 | 2009-10-14 | 中兴通讯股份有限公司 | In Web TV, direct broadcast band is carried out the method and system of preview |
-
2008
- 2008-09-16 CN CN2008102120642A patent/CN101677396B/en not_active Expired - Fee Related
-
2009
- 2009-09-04 WO PCT/CN2009/073749 patent/WO2010031309A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012079495A1 (en) * | 2010-12-14 | 2012-06-21 | 中兴通讯股份有限公司 | Method and system for realizing mosaic television services |
| CN102572522A (en) * | 2010-12-14 | 2012-07-11 | 中兴通讯股份有限公司 | Method and system for realizing mosaic television services |
| CN102572522B (en) * | 2010-12-14 | 2015-04-01 | 中兴通讯股份有限公司 | Method and system for realizing mosaic television services |
| CN112087665A (en) * | 2020-09-17 | 2020-12-15 | 掌阅科技股份有限公司 | Previewing method of live video, computing equipment and computer storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010031309A1 (en) | 2010-03-25 |
| CN101677396B (en) | 2011-07-20 |
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