CN104144359A - Method and system for fast channel change of IPTV multicast - Google Patents
Method and system for fast channel change of IPTV multicast Download PDFInfo
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- CN104144359A CN104144359A CN201310170184.1A CN201310170184A CN104144359A CN 104144359 A CN104144359 A CN 104144359A CN 201310170184 A CN201310170184 A CN 201310170184A CN 104144359 A CN104144359 A CN 104144359A
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Abstract
The invention relates to a method and system for fast channel change of IPTV multicast. The method comprises the steps that an access device forwards an internet group management protocol join message sent by a set top box to a fast channel change server; the fast channel change server provides a fast channel change service for the set top box according to the internet group management protocol join message; when the fast channel change server senses synchronization of a new channel program stream, the internet group management protocol join message is sent back to the access device; the access device transmits the internet group management protocol join message to an upper-layer device in an unvarnished mode so as to join a multicast group of a new channel; when the access device receives a multicast media stream from the upper-layer device, the fast channel change server is noticed stopping the fast channel change service, and the multicast media stream is sent to the set top box. According to the method and system for fast channel change of IPTV multicast, IPTV multicast channel change delay can be shortened, and the set top box does not need to be upgraded.
Description
Technical field
The present invention relates to Web TV (being called for short IPTV) field, relate in particular to the method and system that a kind of IPTV multicast channel switches fast.
Background technology
IPTV multicast channel handover delay is the IPTV service-user Quality of experience index important component part of (Quality of Experience is called for short QoE).Channel change delay refers to that from user, controlling remote controller initiates channel switch request, to the picture of requested channel, occurs institute's elapsed time on video screen.Generally speaking, the acceptable channel change delay of people should be within 1 second.As channel change delay surpasses 2 seconds, have obvious hysteresis, pause and feel, user is easily sick of.
The channel of IPTV switches different with traditional tv, and in traditional cable TV network, video terminal receives all channel signals simultaneously, time of switching channels is about 0.5 second, the time of switching channels of Digital Television is because there being decode procedure, slightly long compared with cable TV, but also in 1 second.IPTV is subject to the limit bandwidth of Access Network, and terminal can only receive a road channel simultaneously, and the channel handoff procedure of IPTV needs complicated network signal mutual, and therefore, IPTV multicast channel handover delay accumulative total can be longer.
In prior art, there is a kind of fast channel that is called to switch (Fast Channel Change, abbreviation FCC) technology, can be by when channel switches, by FCC server, to Set Top Box (Set Top Box, be called for short STB), send out soon to take I frame special and reduce switching time as initial clean culture program stream.Its principle is mainly because Media Stream is to arrange and form with the frame alternate intervals of I, B, P three types, shape is as IBBPBBPIBBPBBP, Set Top Box only receives that B, P frame cannot decode separately, must wait while receiving first I frame, could start decode and play out picture.Use after FCC technology, Set Top Box receives special unicast stream, and first frame is exactly I frame, can wait for, rapidly decoding.
When this technology increases FCC server in requiring network, also require Set Top Box all in network to do corresponding transformation.But the brand of Set Top Box is numerous in existing network, require the Set Top Box of all brands to transform, and one by one with FCC server integration test, workload is not little.
Summary of the invention
The object of the invention is to propose the method and system that a kind of IPTV multicast channel switches fast, can reduce IPTV multicast channel handover delay, and without upgrading set top box.
For achieving the above object, the invention provides a kind of method that IPTV multicast channel switches fast, comprising:
The IGMP that access device sends Set Top Box (Internet Group Management Protocol is called for short IGMP) adds message to be transmitted to fast channel switching server;
Described fast channel switching server adds message to provide fast channel handed over service to described Set Top Box according to described IGMP;
Described fast channel switching server perceives new channel program stream when synchronous, adds message to send back to described access device described IGMP;
Described access device adds message to pass through upper layer device described IGMP, to add the multicast group of new channel;
When described access device receives from the multicast Media Stream of upper layer device, notify described fast channel switching server to stop fast channel handed over service, and described multicast Media Stream is sent to described Set Top Box.
Further, IGMP Set Top Box being sent at described access device adds before message is transmitted to fast channel switching server, also comprises:
When described Set Top Box receives channel switch request, to described access device, send IGMP leave group message;
Described access device passes through upper layer device by described IGMP leave group message, to depart from the multicast group of original channel.
Further, described fast channel switching server adds message to provide the operation of fast channel handed over service to be specially to described Set Top Box according to described IGMP:
Described fast channel switching server adds message to select the video information of the new channel of buffer memory according to described IGMP;
Described fast channel switching server is that initial new channel program stream is pushed to described Set Top Box with mode of unicast speed by I frame in the video information of the new channel of buffer memory.
Further, described fast channel switching server is that the operation that initial new channel program stream is pushed to described Set Top Box with mode of unicast speed is specially by I frame in the video information of the new channel of buffer memory:
Described fast channel switching server is that initial new channel program stream is pushed to described Set Top Box with mode of unicast 1.N speed by up-to-date I frame in the video information of the new channel of buffer memory.
Further, described fast channel switching server perceives the synchronous operation of new channel program stream and is specially:
The inspection of described fast channel switching server from the RTP sequence number of the multicast Media Stream of the received new channel of multicast source whether with send to the RTP sequence number of new channel program stream of described Set Top Box identical, if identical, determine that to perceive new channel program stream synchronous.
Further, when described access device receives from the multicast Media Stream of upper layer device, the operation of notifying described fast channel switching server to stop fast channel handed over service is specially:
When described access device receives from the multicast Media Stream of upper layer device, to described fast channel switching server, send the notice that stops fast channel handed over service;
Described fast channel switching server stops sending new channel program stream to described Set Top Box according to described notice.
Further, the operation that described access device passes through upper layer device by described IGMP leave group message is specially:
Described access device passes through multicast router by described IGMP leave group message;
The operation that described access device adds message to pass through upper layer device described IGMP is specially:
Described access device adds message to pass through multicast router described IGMP;
The operation that described access device receives from the multicast Media Stream of upper layer device is specially:
Described access device receives the multicast Media Stream from multicast source.
For achieving the above object, the invention provides the quick system of switching of a kind of IPTV multicast channel comprises:
Access device, for the IGMP that Set Top Box is sent, add message to be transmitted to fast channel switching server, when receiving described IGMP that described fast channel switching server beams back and add message, add message to pass through upper layer device described IGMP, to add the multicast group of new channel, and when receive from upper layer device multicast Media Stream time, notify described fast channel switching server to stop fast channel handed over service, and described multicast Media Stream is sent to described Set Top Box;
Fast channel switching server, for the described IGMP forwarding according to described access device, add message to provide fast channel handed over service to described Set Top Box, when perceiving new channel program stream when synchronous, add message to send back to described access device described IGMP.
Further, described access device specifically comprises:
The first message transmitting module, adds message to be transmitted to described fast channel switching server for the IGMP that described Set Top Box is sent;
The first message transparent transmission module, for when receiving described IGMP that described fast channel switching server beams back and add message, adds message to pass through upper layer device described IGMP, to add the multicast group of new channel;
Stop Service Notification module, when receiving the multicast Media Stream from upper layer device, notify described fast channel switching server to stop fast channel handed over service;
Multicast data flow sending module, for sending to described Set Top Box by described multicast Media Stream.
Further, described access device also comprises:
The second message transparent transmission module, for when receiving the IGMP leave group message of described Set Top Box transmission, passes through upper layer device by described IGMP leave group message, to depart from the multicast group of original channel.
Further, described fast channel handed over service implement body comprises:
Service providing module, adds message to provide fast channel handed over service to described Set Top Box for the described IGMP forwarding according to described access device;
Synchronous sensing module, synchronous for perception new channel program stream;
Message is beamed back module, for perceiving new channel program stream when synchronous, adds message to send back to described access device described IGMP.
Further, described service providing module specifically comprises:
Channel buffer memory selected cell, for adding message to select the video information of the new channel of buffer memory according to described IGMP;
Clean culture push unit, for being that initial new channel program stream is pushed to described Set Top Box with mode of unicast speed by the video information I frame of the new channel of buffer memory.
Further, described clean culture push unit is specifically for being that initial new channel program stream is pushed to described Set Top Box with mode of unicast 1.N speed by up-to-date I frame in the video information of the new channel of buffer memory.
Further, described synchronous sensing module specifically comprises:
Sequence number inspection unit, for the RTP sequence number of the multicast Media Stream from the received new channel of multicast source whether with send to the RTP sequence number of new channel program stream of described Set Top Box identical;
Perception confirmation of synchronization unit, for when RTP sequence number is identical, determines that to perceive new channel program stream synchronous.
Based on technique scheme, access device of the present invention triggers FCC server fast channel handed over service is provided by IGMP being added to the interception of message and forwarding, and when the perception of FCC server is synchronous, receive the IGMP that FCC server returns and add message, and pass through upper layer device, to obtain the multicast Media Stream of new channel, in whole process, it is all transparent that access device and FCC server add the processing procedure of message to IGMP concerning Set Top Box, therefore without Set Top Box is upgraded, also can realize the object that reduces IPTV multicast channel handover delay simultaneously.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the IPTV multicast channel of the present invention schematic flow sheet of an embodiment of the method for switching fast.
Fig. 2 is the IPTV multicast channel of the present invention signaling process schematic diagram of another embodiment of the method for switching fast.
Fig. 3 is the IPTV multicast channel of the present invention structural representation of an embodiment of the system of switching fast.
Fig. 4 is the IPTV multicast channel of the present invention structural representation of another embodiment of the system of switching fast.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The schematic flow sheet of one embodiment of the method for switching fast for IPTV multicast channel of the present invention as shown in Figure 1.In the present embodiment, the quick switching flow of IPTV multicast channel comprises:
The IGMP that step 101, access device send Set Top Box adds message (IGMP Join) to be transmitted to FCC server;
Step 102, FCC server provide channel quick handed over service according to IGMP Join message to Set Top Box;
Step 103, FCC server perceive new channel program stream when synchronous, and IGMP Join message is sent back to access device;
Step 104, access device pass through upper layer device by IGMP Join message, to add the multicast group of new channel;
When step 105, access device receive from the multicast Media Stream of upper layer device, notice FCC server stops the quick handed over service of channel, and multicast Media Stream is sent to Set Top Box.
In existing channel switching flow, channel number keyboard in user's remote controller or the front and back switching key of channel, or during the channel switching push button in user's direct control Set Top Box, Set Top Box can convert this operation to IGMP Join message and send to access device, to pass to upper layer device by access device, obtain the multicast Media Stream of corresponding channel.But this mode can cause the problem of channel change delay alternately due to complicated network signal, existing settling mode is that requirement Set Top Box is when initiating channel switching, first whereabouts FCC server sends request, obtain the channel content of buffer memory on FCC server, then after joining the multicast group of new channel, stop the service of FCC server, but this mode just requires Set Top Box transformation, can first to FCC server, send request, and this means and all will make this upgrading to the Set Top Box of all kinds brand of One's name is legion, difficulty is very big.
The present embodiment initiates the service of FCC server to change by access device to realize, when access device receives IGMP Join message, no longer direct this message of transparent transmission, but this message is transmitted to FCC server, by FCC server, for Set Top Box provides the program stream of the new channel in channel handoff procedure, when user is watched, do not have and postpone sense.Because FCC server is the new channel program stream of buffer memory, the new channel program stream that therefore offers Set Top Box will, early than current new channel program stream, therefore just need to, after synchronously completing, reinform upper layer device and Set Top Box be added to the multicast group of new channel conventionally.This notification procedure also participates in without Set Top Box, only needs FCC server when perception is synchronous, IGMP Join message is sent back to access device, then pass through upper layer device by access device.Can see, the present embodiment not only can solve the problem of channel change delay, and only needs FCC server and access device to transform, and transformation amount is much smaller than upgrading set top box.
Set Top Box is when receiving channel switch request, conventionally to first depart from the multicast group of original channel, join again the multicast group of new channel, therefore before sending IGMP Join message, also can send IGMP Leave message to access device, and access device can directly pass through this IGMP Leave message upper layer device, depart from the multicast group of original channel.This process can be consistent with existing procedure.
FCC server is when receiving IGMP Join message, will provide fast channel handed over service to Set Top Box, in this process, FCC server can be selected according to IGMP Join message the video information of the new channel of buffer memory, and is that initial new channel program stream is pushed to Set Top Box with mode of unicast speed by I frame in the video information of the new channel of buffer memory.Because Set Top Box will could start decoding broadcasting pictures when receiving I frame, so the program stream of FCC server using the I frame in the video information of the new channel of buffer memory as start frame send to Set Top Box, can make Set Top Box decode at once and play.And due to RTP (the Real-time Transport Protocol of I frame, being called for short RTP) sequence number is conventionally early than the RTP sequence number of multicast source real time propelling movement, therefore can push with mode of unicast 1.N speed, the clean culture speed is here conventionally between 1 speed and 2 speeds, the degree shifting to an earlier date according to the RTP sequence number of I frame, can also select higher speed, such as being more than or equal to 2 speeds etc.Preferably the program stream using I frame up-to-date in the video information of the new channel in buffer memory as start frame is pushed to Set Top Box with mode of unicast 1.N speed, not only can realize as early as possible the synchronous of program stream, and not need to adopt too high speed and affect user and watch.
Broadcasting along with the program stream of FCC server push, FCC server need to be to new channel program stream synchronously carry out perception, this perception can by the inspection of FCC server from the RTP sequence number of the multicast Media Stream of the received new channel of multicast source whether with identical realization of RTP sequence number that sends to the new channel program stream of Set Top Box, if sequence number is identical, determine that to perceive new channel program stream synchronous.
FCC server is when perception new channel program stream is synchronous, IGMP Join message is sent back to access device, and access device passes through upper layer device by IGMP Join message, to add the multicast group of new channel, upper layer device can send to access device by the multicast Media Stream of corresponding channel according to IGMP Join message, when access device receives the multicast Media Stream from upper layer device, to FCC server, send the notice that stops fast channel handed over service, fast channel switching server stops sending new channel program stream to Set Top Box according to this notice.
The signaling process schematic diagram of another embodiment of the method for switching fast for IPTV multicast channel of the present invention as shown in Figure 2.In the present embodiment, access device is carrier side by the equipment of user access network as digital subscriber line access multiplex (Digital Subscriber Line Access Multiplexer is called for short DSLAM).Upper layer device can comprise multicast router and multicast source.IPTV multicast channel fast switch over method comprises:
The front and back switching key of step 201, the channel number keyboard in user's remote controller or channel, or during the channel switching push button in user's direct control Set Top Box, Set Top Box sends to access device by IGMP Leave message;
Step 202, access device pass through multicast router by IGMP Leave message;
Step 203, Set Top Box send to access device by IGMP Join message;
Step 204, access device are transmitted to FCC server by the IGMP Join message receiving;
Step 205, FCC server are selected the video information of the new channel of buffer memory according to IGMP Join message, and are that initial new channel program stream is pushed to Set Top Box with mode of unicast 1.N speed by up-to-date I frame in the video information of the new channel of buffer memory;
Step 206, the inspection of FCC server from the RTP sequence number of the multicast Media Stream of the received new channel of multicast source whether with send to the RTP sequence number of new channel program stream of Set Top Box identical, if identical, determine that to perceive new channel program stream synchronous, and IGMP Join message is sent back to access device;
Step 207, access device pass through multicast router by IGMP Join message, to add the multicast group of new channel;
Step 208, multicast source add at access device after the multicast group of new channel, and multicast Media Stream is sent to access device;
When step 209, access device receive from the multicast Media Stream of multicast source, notice FCC server stops fast channel handed over service;
Step 210, access device send to Set Top Box by multicast Media Stream.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
The structural representation of one embodiment of the system of switching fast for IPTV multicast channel of the present invention as shown in Figure 3.In the present embodiment, the system that IPTV multicast channel switches fast comprises: access device 1 and FCC server 2.
The IGMP Join message that access device 1 is responsible for Set Top Box to send is transmitted to FCC server 2, when receiving the IGMP Join message that FCC server 2 beams back, IGMP Join message is passed through to upper layer device, to add the multicast group of new channel.When access device 1 receives the multicast Media Stream from upper layer device, notice FCC server 2 stops fast channel handed over service, and multicast Media Stream is sent to Set Top Box.
The IGMP Join message that FCC server 2 is responsible for forwarding according to access device provides fast channel handed over service to Set Top Box, when perceiving new channel program stream when synchronous, IGMP Join message is sent back to access device 1.
In the present embodiment, access device can trigger FCC server fast channel handed over service is provided by IGMP being added to the interception of message and forwarding, and when the perception of FCC server is synchronous, receive the IGMP that FCC server returns and add message, and pass through upper layer device, to obtain the multicast Media Stream of new channel, in whole process, it is all transparent that access device and FCC server add the processing procedure of message to IGMP concerning Set Top Box, therefore without Set Top Box is upgraded, also can realize the object that reduces IPTV multicast channel handover delay simultaneously.
The structural representation of another embodiment of the system of switching fast for IPTV multicast channel of the present invention as shown in Figure 4.In the present embodiment, access device 1 specifically comprises: the first message transmitting module 11, the first message transparent transmission module 12, stop Service Notification module 13 and multicast data flow sending module 14.
The first message transmitting module 11 is transmitted to FCC server for the IGMP Join message that Set Top Box is sent.The first message transparent transmission module 12 is responsible for, when receiving the IGMP Join message that FCC server beams back, IGMP Join message being passed through to upper layer device, to add the multicast group of new channel.When stopping Service Notification module 13 and being responsible for receiving the multicast Media Stream from upper layer device, notice FCC server stops fast channel handed over service.Multicast data flow sending module 14 is responsible for multicast Media Stream to send to Set Top Box.
In another embodiment, access device can also comprise the second message transparent transmission module, for when receiving the IGMP Leave message of described Set Top Box transmission, IGMP Leave message is passed through to upper layer device, to depart from the multicast group of original channel.
In the present embodiment, FCC server 2 specifically comprises: service providing module 21, synchronous sensing module 22 and message are beamed back module 23.
The described IGMP Join message that service providing module 21 is responsible for forwarding according to described access device provides fast channel handed over service to described Set Top Box.It is synchronous that synchronous sensing module 22 is responsible for perception new channel program stream.Message is beamed back module 23 and is responsible for, perceiving new channel program stream when synchronous, described IGMP Join message being sent back to described access device.
For service providing module, it can specifically comprise channel buffer memory selected cell and clean culture push unit, its mid band buffer memory selected cell is for select the video information of the new channel of buffer memory according to IGMP Join message, and clean culture push unit is for being that initial new channel program stream is pushed to Set Top Box with mode of unicast speed by the video information I frame of the new channel of buffer memory.Clean culture push unit is preferably that initial new channel program stream is pushed to Set Top Box with mode of unicast 1.N speed by up-to-date I frame in the video information of the new channel of buffer memory.
Synchronous sensing module can specifically comprise sequence number inspection unit and perception confirmation of synchronization unit, wherein sequence number inspection unit for the RTP sequence number from the multicast Media Stream of the received new channel of multicast source whether with send to the RTP sequence number of new channel program stream of Set Top Box identical, perception confirmation of synchronization unit is for when RTP sequence number is identical, determines that to perceive new channel program stream synchronous.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement the specific embodiment of the present invention; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (14)
1. the method that IPTV multicast channel switches fast, comprising:
The IGMP that access device sends Set Top Box adds message to be transmitted to fast channel switching server;
Described fast channel switching server adds message to provide fast channel handed over service to described Set Top Box according to described IGMP;
Described fast channel switching server perceives new channel program stream when synchronous, adds message to send back to described access device described IGMP;
Described access device adds message to pass through upper layer device described IGMP, to add the multicast group of new channel;
When described access device receives from the multicast Media Stream of upper layer device, notify described fast channel switching server to stop fast channel handed over service, and described multicast Media Stream is sent to described Set Top Box.
2. the method that IPTV multicast channel according to claim 1 switches fast, wherein, IGMP Set Top Box being sent at described access device adds before message is transmitted to fast channel switching server, also comprises:
When described Set Top Box receives channel switch request, to described access device, send IGMP leave group message;
Described access device passes through upper layer device by described IGMP leave group message, to depart from the multicast group of original channel.
3. the method that IPTV multicast channel according to claim 2 switches fast, wherein, described fast channel switching server adds message to provide the operation of fast channel handed over service to be specially to described Set Top Box according to described IGMP:
Described fast channel switching server adds message to select the video information of the new channel of buffer memory according to described IGMP;
Described fast channel switching server is that initial new channel program stream is pushed to described Set Top Box with mode of unicast speed by I frame in the video information of the new channel of buffer memory.
4. the method that IPTV multicast channel according to claim 3 switches fast, wherein, described fast channel switching server is that the operation that initial new channel program stream is pushed to described Set Top Box with mode of unicast speed is specially by I frame in the video information of the new channel of buffer memory:
Described fast channel switching server is that initial new channel program stream is pushed to described Set Top Box with mode of unicast 1.N speed by up-to-date I frame in the video information of the new channel of buffer memory.
5. the method for switching fast according to the IPTV multicast channel described in claim 3 or 4, wherein, described fast channel switching server perceives the synchronous operation of new channel program stream and is specially:
The inspection of described fast channel switching server from the RTP sequence number of the multicast Media Stream of the received new channel of multicast source whether with send to the RTP sequence number of new channel program stream of described Set Top Box identical, if identical, determine that to perceive new channel program stream synchronous.
6. the method for switching fast according to the IPTV multicast channel described in claim 3 or 4, wherein, when described access device receives from the multicast Media Stream of upper layer device, the operation of notifying described fast channel switching server to stop fast channel handed over service is specially:
When described access device receives from the multicast Media Stream of upper layer device, to described fast channel switching server, send the notice that stops fast channel handed over service;
Described fast channel switching server stops sending new channel program stream to described Set Top Box according to described notice.
7. the method that IPTV multicast channel according to claim 2 switches fast, wherein, the operation that described access device passes through upper layer device by described IGMP leave group message is specially:
Described access device passes through multicast router by described IGMP leave group message;
The operation that described access device adds message to pass through upper layer device described IGMP is specially:
Described access device adds message to pass through multicast router described IGMP;
The operation that described access device receives from the multicast Media Stream of upper layer device is specially:
Described access device receives the multicast Media Stream from multicast source.
8. the system that IPTV multicast channel switches fast, comprising:
Access device, for the IGMP that Set Top Box is sent, add message to be transmitted to fast channel switching server, when receiving described IGMP that described fast channel switching server beams back and add message, add message to pass through upper layer device described IGMP, to add the multicast group of new channel, and when receive from upper layer device multicast Media Stream time, notify described fast channel switching server to stop fast channel handed over service, and described multicast Media Stream is sent to described Set Top Box;
Fast channel switching server, for the described IGMP forwarding according to described access device, add message to provide fast channel handed over service to described Set Top Box, when perceiving new channel program stream when synchronous, add message to send back to described access device described IGMP.
9. the system that IPTV multicast channel according to claim 8 switches fast, wherein, described access device specifically comprises:
The first message transmitting module, adds message to be transmitted to described fast channel switching server for the IGMP that described Set Top Box is sent;
The first message transparent transmission module, for when receiving described IGMP that described fast channel switching server beams back and add message, adds message to pass through upper layer device described IGMP, to add the multicast group of new channel;
Stop Service Notification module, when receiving the multicast Media Stream from upper layer device, notify described fast channel switching server to stop fast channel handed over service;
Multicast data flow sending module, for sending to described Set Top Box by described multicast Media Stream.
10. the system that IPTV multicast channel according to claim 9 switches fast, wherein, described access device also comprises:
The second message transparent transmission module, for when receiving the IGMP leave group message of described Set Top Box transmission, passes through upper layer device by described IGMP leave group message, to depart from the multicast group of original channel.
The system that 11. IPTV multicast channels according to claim 10 switch fast, wherein, described fast channel handed over service implement body comprises:
Service providing module, adds message to provide fast channel handed over service to described Set Top Box for the described IGMP forwarding according to described access device;
Synchronous sensing module, synchronous for perception new channel program stream;
Message is beamed back module, for perceiving new channel program stream when synchronous, adds message to send back to described access device described IGMP.
The system that 12. IPTV multicast channels according to claim 10 switch fast, wherein, described service providing module specifically comprises:
Channel buffer memory selected cell, for adding message to select the video information of the new channel of buffer memory according to described IGMP;
Clean culture push unit, for being that initial new channel program stream is pushed to described Set Top Box with mode of unicast speed by the video information I frame of the new channel of buffer memory.
The system that 13. IPTV multicast channels according to claim 12 switch fast, wherein, described clean culture push unit is specifically for being that initial new channel program stream is pushed to described Set Top Box with mode of unicast 1.N speed by up-to-date I frame in the video information of the new channel of buffer memory.
14. systems of switching fast according to the IPTV multicast channel described in claim 12 or 13, wherein, described synchronous sensing module specifically comprises:
Sequence number inspection unit, for the RTP sequence number of the multicast Media Stream from the received new channel of multicast source whether with send to the RTP sequence number of new channel program stream of described Set Top Box identical;
Perception confirmation of synchronization unit, for when RTP sequence number is identical, determines that to perceive new channel program stream synchronous.
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| CN103347207A (en) * | 2013-06-28 | 2013-10-09 | 江苏省邮电规划设计院有限责任公司 | Method for rapidly switching IPTV multi-cast channels |
| CN104811790A (en) * | 2015-05-14 | 2015-07-29 | 国网黑龙江省电力有限公司信息通信公司 | Method for quickening channel change speed of digital TV (television) set-top box by combining unicast with multicast |
| CN105376613A (en) * | 2015-12-10 | 2016-03-02 | 华为技术有限公司 | Fast channel switching method, server and IPTV system |
| CN106937155A (en) * | 2015-12-29 | 2017-07-07 | 北京华为数字技术有限公司 | Access device, internet protocol TV IPTV system and channel switching method |
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