CN107566855A - Method, server and the set top box that channel is switched fast - Google Patents
Method, server and the set top box that channel is switched fast Download PDFInfo
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- CN107566855A CN107566855A CN201610514886.0A CN201610514886A CN107566855A CN 107566855 A CN107566855 A CN 107566855A CN 201610514886 A CN201610514886 A CN 201610514886A CN 107566855 A CN107566855 A CN 107566855A
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- channel
- media stream
- code check
- multicast
- server
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Classifications
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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 MPEG packets from an IP network
-
- 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
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
Abstract
The invention relates to a kind of method that channel is switched fast, server and set top box, including：FCC requests are sent to FCC servers, the Media Stream of the first code check of target channel is received from the FCC servers, play the Media Stream of the first code check of target channel；Notice is added according to the multicast received from FCC servers, sending multicast to multicast server adds request；The Media Stream of the second code check of the target channel is received from FCC servers, the second code check is higher than the first code check；The Media Stream of the second code check of target channel is received from multicast server；Media Stream, which is sent, to FCC servers terminates request；The Media Stream of second code check of the target channel according to the Media Stream of the second code check of the target channel received from FCC servers and from multicast server reception, play the Media Stream of the second code check of target channel.Realize the set top box in shorter time and have received Media Stream, and commence play out, shorten the time of channel switch.
Description
Technical field
The application is related to video media technical field, more particularly to method, server and the set top box that channel is switched fast.
Background technology
Channel switch is that the elemental user of traditional tv is experienced, internet protocol TV (Internet Protocol
Television, IPTV) optimal Consumer's Experience to be provided, the level of channel switch speed must meet or exceed traditional electricity
Depending on, while to ensure the image quality played during channel switch.Therefore, channel switch delay is effectively reduced, when ensureing channel
The Consumer's Experience effect of broadcasting pictures, the success to IPTV are most important.
It is existing that (fast channel change, FCC) server can be switched fast by disposing channel, can be frequency
The delay of road switching was reduced to 1 second from 2.5 seconds, but the time delay of 1 second is still very long, and IPTV channel switch is than traditional tv also
It is slow, still can not meets the needs of Consumer's Experience.
The content of the invention
The embodiment of the present application provides the methods, devices and systems that a kind of channel is switched fast, and reduces the frequency in IPTV system
The time that road is consumed when switching, improve Consumer's Experience.
On the one hand, embodiments herein provides a kind of method that channel is switched fast.Method includes：Set top box is to frequently
Road is switched fast server transmission channel and is switched fast request, and the channel is switched fast the mark that request contains target channel,
This spline channel is switched fast mark of the server can according to the target channel, and the media of target channel are sent to set top box
Stream, set top box receive the Media Stream of the first code check, it is possible to play.The Media Stream now sent is low bit- rate, i.e.,
The Media Stream of one code check, it is low bit- rate because channel is switched fast the Media Stream that server starts to put, therefore channel is quickly cut
Set top box can be quickly sent to by the Media Stream of caching in a short time by changing server, and set top box in a short time can
Low bit- rate Media Stream is enough played, allows the very fast of Consumer's Experience channel switch.As a rule, channel is switched fast server settings
After the completion of the media stream of the first code check in time, multicast will be sent to set top box and add notice, and to set top box
Send the Media Stream of the Media Stream of high code check, i.e. the second code check.After set top box receives, knowing needs to add multicast server at present
Multicast, therefore to multicast server send multicast add request, then, set top box can from multicast server receive mesh
Mark the high code check Media Stream of channel, now need notification channel to be switched fast server and stop sending Media Stream, then it is fast to channel
Fast switching server sends Media Stream and terminates request, and channel is switched fast server and is receiving Media Stream termination request, by multicast
The high code check Media Stream that server does not issue set top box is reissued to set top box, after being sent completely, just stops sending out to set top box
Send Media Stream.High the code check Media Stream and channel that so set top box sends multicast server are switched fast server transmission
High code check Media Stream combines, and plays the Media Stream of high code check, and subsequently directly receives the high code that multicast server is sent
Rate Media Stream, just complete being switched fast for channel.This method due at the beginning from FCC servers receive be low bit- rate media
Stream, therefore the Media Stream of target channel rapidly will be sent on set top box, therefore the machine in shorter time can be realized
Top box have received Media Stream, and commence play out, and shorten the time of channel switch.And because Media Stream is low bit- rate, send matchmaker
Network bandwidth required for body stream also diminishes, therefore impact of the channel fast handover procedures to network bandwidth is smaller.
In a possible design, the either Media Stream of multicast server multicast mode transmission, or FCC servers
Mode of unicast send Media Stream in transmitting procedure, be all with packet (such as：RTP bags) form be transmitted.
That is：The Media Stream of first code check of target channel can be carried on unicast low bit- rate packet, quickly be cut from the channel
Unicast high code rate data bag can be carried on by changing the Media Stream for the second code check that server receives target channel, be taken from the multicast
The Media Stream of second code check of the target channel that business device receives can be carried on multicast high code rate data bag.
In another possible design, Media Stream can be specially burst one by one, such as：Dash bursts.Encoder
It is to carry out burst division to media content sequentially in time, such as：Every 2 seconds, a media content can be divided
For an independent burst.That is, the 0-2 seconds are burst 1, the 2-4 seconds are burst 2, and the 4-6 seconds are burst 3, the like.Due to
Each burst is independent file, and set top box (or set top box include player) can play the independent burst.Generally come
Say that the media stream for the first code check that channel was switched fast in the server settings time is completed, be specifically as follows channel and quickly cut
Change server and send the independent burst of 1 of the first code check of caching or more than 1 and terminate.High code check is sent to set top box
The Media Stream of Media Stream, i.e. the second code check, specifically, after the burst transmission of the first code check of caching terminates, to set top box
Send the burst of the second code check.
In another possible design, set top box can will be switched fast the unicast of server reception from the channel
High code rate data bag and the multicast high code rate data bag received from the multicast server are decoded into a burst, play described point
Piece.It may also be said that from the channel be switched fast server reception unicast high code rate data bag and the multicast server connect
The multicast high code rate data bag of receipts is two parts of an independent burst, as long as therefore the two decoded packet datas are only into one
Vertical burst, set top box (or set top box include player) can play.
In another possible design, Media Stream can be video flowing, audio stream either one kind of caption stream or it
Arbitrary mixed flow between three.
On the other hand, embodiments herein provides a kind of method that channel is switched fast.Method includes：FCC is serviced
The FCC requests that device receiving set up box is sent, the mark of the target channel contained according to the FCC request bags, to described in set top box transmission
The Media Stream of the low bit- rate of target channel；When the media stream of the low bit- rate of the target channel in setting time is completed
Afterwards, now stop sending the Media Stream of low bit- rate to set top box, sending multicast to the set top box adds notice, and to described
Set top box sends the Media Stream of the high code check of the target channel.When set top box receives the high code check of multicast server transmission
During Media Stream, the Media Stream that FCC servers send receiving set up box terminates request, now FCC servers can stop to
The set top box sends the Media Stream of the high code check of the target channel.
In a possible design, FCC servers receive each channel that multicast server is sent and (include target frequency
Road) Media Stream, because FCC servers are intended merely to realize that channel is switched fast, therefore FCC servers will not be permanently stored and connect
Media Stream is received, and simply caches the Media Stream of the low bit- rate of target channel and high code check in certain time.Due to FCC servers
It is to continue to receive the Media Stream that multicast server is sent, therefore caches the Media Stream in certain time equivalent to the window that caching slides
The Media Stream of mouth.Such as：All the time the Media Stream of 10 seconds is cached, when there is the new media stream receiver of 1 second, earliest 1 will be abandoned
The Media Stream of second.As described in the above method, Media Stream can be the form of burst, by taking 2 seconds bursts as an example, 10
The Media Stream of second may be exactly 5 bursts.Taken for the Media Stream of the low bit- rate of the target channel in setting time by FCC
Business device, which is sent completely, to be specifically as follows：The Media Stream (equivalent to 5 bursts) of 10 seconds low bit- rates of caching is sent to set top box
Terminate (mark of end is that a complete burst is sent completely).The Media Stream that this set-top box has just had 10 seconds can be broadcast
Put, in order to improve user's viewing experience, follow-up set top box can play the Media Stream of high code check, therefore FCC server cans
Stop sending low bit- rate Media Stream to set top box, send high code check Media Stream elsewhere, and notify set top box to add multicast.
In another possible design, because set top box also receives what target channel was sent from identical multicast server
Media Stream, that is to say, that the Media Stream that set top box receives from FCC servers and multicast server is all homologous Media Stream, they
Burst division be identical.Method introduction as described above, for same content, burst corresponding to them is
Identical, the packet for transmitting the content is identical, and sequence number corresponding to packet (sequence number is with time sequencing) is certainly
It is also so identical.The Media Stream received from set top box terminates request and contains the of the target channel received from multicast server
The sequence number of one multicast high code rate data bag, as long as FCC servers are by the packet of the high code check before the sequence number (and machine
First multicast high code rate data bag that top box receives belongs to same burst) it is sent to set top box, set top box can will be from
The high code check Media Stream that FCC servers and multicast server receive forms an independent burst and played out, and now FCC is serviced
Device is also required to stop sending to set top box the Media Stream of the second code check of target channel.
Another aspect, the embodiments of the invention provide a kind of set top box, the set top box, which has, to be realized in above method design
The function of set top box behavior.The function can be realized by hardware, and corresponding software can also be performed by hardware and is realized.Institute
Stating hardware or software includes one or more modules corresponding with above-mentioned function phase.The module can be software and/or hardware.
In a possible design, the structure of set top box includes transceiver and processor, and the receiver is configured
To support set top box to FCC servers transmission channel is switched fast request, Media Stream terminates request and is sent out to multicast server
Multicast is sent to add request, receiving the Media Stream of the first code check, the Media Stream of the second code check, multicast from FCC servers adds notice
And various instructions or the Media Streams such as the media of the second code check are received from multicast server.The processor control set top box is broadcast
Put the first code check Media Stream or the second code check Media Stream.
Another aspect, the embodiments of the invention provide a kind of FCC servers, the FCC servers, which have, realizes the above method
The function of FCC servers behavior in design.The function can be realized by hardware, can also be performed by hardware corresponding soft
Part is realized.The hardware or software include one or more modules corresponding with above-mentioned function phase.The module can be software
And/or hardware.
In a possible design, the structures of FCC servers includes transceiver and processor, the receiver by with
It is set to and supports FCC servers to receive FCC requests from set top box, Media Stream terminates request, and sends the first code check to set top box
Media Stream, the Media Stream and multicast of the second code check add notice.Processor control FCC servers start or stop to
Set top box sends the Media Stream of the first code check, the Media Stream of the second code check.
Another aspect, the embodiments of the invention provide a kind of communication system, the system includes the machine top described in above-mentioned aspect
Box and FCC servers.
Another further aspect, the embodiments of the invention provide a kind of computer-readable storage medium, for saving as above-mentioned set top box institute
Computer software instructions, it, which is included, is used to perform the program designed by above-mentioned aspect.
Another further aspect, the embodiments of the invention provide a kind of computer-readable storage medium, for saving as used in above-mentioned FCC
Computer software instructions, it, which is included, is used to perform the program designed by above-mentioned aspect.
Compared to prior art, in scheme provided by the invention, what is sent at the beginning due to FCC servers is low bit- rate
Media Stream, the time of the low bit- rate Media Stream of transmission will shorten, and the Media Stream that set top box receives low bit- rate also just shortens, therefore
Can that can be within a very short time plays the video of target channel, therefore shortens the set top box stand-by period and channel is cut
The time changed.Further, since the Media Stream of transmission is low bit- rate, the Media Stream transmitted between FCC servers and set top box
The bandwidth consumed will also decrease, and will not cause the situation of congestion, also improve FCC efficiency and performance.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 show the grid schematic diagram that a kind of channel of the embodiment of the present invention is switched fast；
Fig. 2 show computer equipment schematic diagram provided in an embodiment of the present invention；
Fig. 3 show the method flow schematic diagram that channel provided in an embodiment of the present invention is switched fast；
Fig. 4 show the structural representation of set top box provided in an embodiment of the present invention；
Fig. 5 show the structural representation that channel provided in an embodiment of the present invention is switched fast server.
Embodiment
In order that the purpose of the application, technical scheme and beneficial effect are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the application is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this Shen
Please, it is not used to limit the application.
The main thought that the channel of the embodiment of the present invention is switched fast is introduced first, including：Set top box services to FCC
Device sends FCC requests, and this spline channel is switched fast the mark of the target channel included during server can is asked according to FCC,
The Media Stream of target channel is sent to set top box, at the beginning, FCC servers send the Media Stream of low bit- rate to set top box, by
Low in the code check of Media Stream, the time for transmitting the Media Stream just shortens, and the time that set top box receives the Media Stream shortens,
The time for playing the Media Stream also shortens, and improves the experience of user channel switching.But transmission low bit- rate is also bad simply,
After the definition so played just reduces, and set top box adds multicast server, and the video flowing of the high code check received,
Therefore the switching to the high low bit- rate of set top box transmitting video-frequency flow progress is needed.That is first yard in setting time of FCC servers
After the completion of the media stream of rate, multicast will be sent to set top box and adds notice, and the matchmaker of high code check is sent to set top box
Body stream.After set top box receives, know needs the multicast for adding multicast server at present, therefore sends multicast to multicast server
Request is added, then, set top box can receives the high code check Media Stream of target channel from multicast server, now needs to notify
Channel, which is switched fast server, to be stopped sending Media Stream, then being switched fast server to channel sends Media Stream termination request, frequency
Road is switched fast server and is receiving Media Stream termination request, and multicast server is not issued to the high code check Media Stream of set top box
Reissue to set top box, after being sent completely, just stop sending Media Stream to set top box.So set top box sends out multicast server
The high code check Media Stream that high the code check Media Stream and channel sent is switched fast server transmission combines, and plays the matchmaker of high code check
Body stream, and the follow-up high code check Media Stream for directly receiving multicast server transmission, just complete being switched fast for channel.
As shown in figure 1, the system framework figure that the simple channel fast switch over method of the embodiment of the present invention is applied, including：
Live source 101, self-adaption code rate (adaptive bit rate, ABR) encoder 102, live transponder (media relay
Function, MRF) 103, multicast server 104, channel is switched fast (fast channel change, FCC) server 105
With set top box (set top box, STB) 106.Wherein, live source 101 is used to export live Media Stream, Media Stream here
The one or more of video flowing, audio stream and caption stream can be included.As a rule, Media Stream can be individually for video flowing, sound
Frequency stream or caption stream, in this case, video flowing that live source 101 can individually export to ABR encoders 102,
Audio stream or caption stream.Live source 101 can also to the outputting video streams of ABR encoders 102 and the mixed-media stream of audio stream,
Or the mixed-media stream of video flowing, audio stream and caption stream.But whether the output of live source 101 is single video flowing,
Audio stream or caption stream, or the mixed-media stream such as video flowing and audio stream, the technical scheme that the embodiment of the present invention is realized are
The same, solution details are similar, and for convenience, each embodiment of the invention is entered so that Media Stream is video flowing as an example
Row explanation, just it is not repeated to describe the technical scheme process that video flowing is audio stream, caption stream or mixed-media stream.
ABR encoders 102 receive the Media Stream pushed from live source 101, and according to different code checks, the Media Stream is distinguished
Encoded, form 2 or more than 2 Media Streams.As a rule, ABR encoders 102 at least may be used to same Media Stream
Encoded with carrying out two kinds of different code checks, such as：Low bit- rate and high code check, low bit- rate are the relatively low Media Streams of definition,
Such as：SD video, high code check are the higher Media Streams of definition, such as：HD video or ultra high-definition video.Generally come
Say, the Media Stream of low bit- rate is switched fast for channel, and high code check is mainly used in the broadcasting of multicast.What Media Stream here used
Coded system can have it is a variety of, such as：HTTP dynamic self-adaptings code stream (Dynamic Adaptive Streaming can be used
Over HTTP, dash) coding, HTTP live TV streams (HTTP Live Streaming, HLS) encode or the volume of other forms
Code.It should be noted that：No matter ABR encoders 102 are encoded or using what kind of lattice using which type of code check
Formula is encoded, as long as live source 101 transmit same Media Stream, to formed after the code media streams different Media Streams it
Between the division of burst be all identical, such as：All it is to be encoded since 0s, was a burst every 2 seconds.So different code checks
Media Stream between switching can realize and take over seamlessly, avoid and lose picture or the problem of picture repeats.ABR encoders
102 by the media stream encoded to MRF103.
MRF103 receives the Media Stream of the transmission of ABR encoders 102, and MRF103 is by the media stream of different code checks to group
Broadcast server 104.Certainly MRF103 may have multiple, not be limited here.
Multicast server 104 receives the Media Stream of the different code checks of MRF103 transmissions, and these Media Streams pass as multicast
Defeated content.
FCC servers 105 are connected with multicast server 104, and difference is obtained by multicast mode from multicast server 104
The Media Stream of code check.As long as FCC servers 105 just obtain different codes in the state of work is run from multicast server 104
The Media Stream of rate.For FCC servers 105 in order to realize that channel is switched fast, FCC servers 104 have cached each channel
The Media Stream of all code checks of (a number of burst) for a period of time.Such as：FCC servers 104 have cached each channel 30
The Media Stream of high code check and the Media Stream of 30 seconds (15 bursts) low bit- rates of second (15 bursts).When from multicast server 104
When can receive a new burst, an earliest burst for caching is abandoned.That is equivalent amount is remained
The Media Stream of burst.Media Stream is generally made up of burst one by one, and in transmitting procedure, burst is generally all compressed into real-time biography
Defeated agreement (Real-time Transport Protocol, RTP) message is transmitted, because a RTP message generally only has
The size of 1500 bytes or so, but a burst may have tens k bytes, hundreds of k bytes, or even a few M.So one point
Piece may be transmitted with many RTP messages, and sequentially in time, a sequence number be distributed to each RTP messages,
That is, it is possible to it is unique by sequence number on individual RTP messages.Multicast server 104 can also receive a new RTP
Bao Shi, an earliest RTP bag for caching is abandoned.In channel fast handover procedures are carried out, FCC servers 105 are first sent
The Media Stream of low bit- rate is to STB106, and after the burst of caching is sent completely, FCC servers 105 are just sent high with normal speed
The Media Stream of code check is to STB106.
STB106 is subscription client, and STB106 carries out communication link with multicast server 104 and FCC servers 105 respectively
Connect, ABR encoders 102 are communicatively coupled with live transponder 103, and live transponder 103 is realized logical with multicast server 104
Letter connection.Communication connection implementation has many kinds, such as：By internet, wireless network (3G/4G/5G) and directly logical
Letter etc..When progress channel is switched fast, STB106 first quickly receives the Media Stream of low bit- rate from FCC servers 105, then
The Media Stream of high code check is gradually received from FCC servers 105, the media of high code check are finally received from multicast server 104
Stream.STB106 can cache a period of time (a number of burst) Media Stream in itself.As a rule STB106, which further comprises, broadcasts
Device is put, when receiving Media Stream, STB106 player can, which is realized, to be played.
In this programme, FCC server buffers receive the burst of all code check Media Streams, and when channel is switched fast,
Quick push lowest bit rate code stream is played to client with quick startup.After client commences play out new channel program, FCC
The code stream of the higher code check of server push is to client so that in channel switch procedure, image quality that user sees present by
The effect smoothly lifted is walked, and realizes being switched fast for channel.
Fig. 2 show computer equipment schematic diagram provided in an embodiment of the present invention.Computer equipment 200 includes at least one
Processor 201, communication bus 202, memory 203 and at least one communication interface 204.
Processor 201 can be a general central processor (CPU), microprocessor, ASIC
(application-specific integrated circuit, ASIC), or it is one or more for controlling the present invention program
The integrated circuit that program performs.
Communication bus 202 may include a path, and information is transmitted between said modules.The communication interface 204, using appoint
A kind of equipment of what transceiver, for other equipment or communication, such as Ethernet, wireless access network (RAN), wirelessly
LAN (Wireless Local Area Networks, WLAN) etc..
Memory 203 can be read-only storage (read-only memory, ROM) or can store static information and instruction
Other kinds of static storage device, random access memory (random access memory, RAM) or letter can be stored
Breath and other kinds of dynamic memory or the EEPROM (Electrically of instruction
Erasable Programmable Read-Only Memory, EEPROM), read-only optical disc (Compact Disc Read-
Only Memory, CD-ROM) or other optical disc storages, laser disc storage (including compression laser disc, laser disc, laser disc, digital universal
Laser disc, Blu-ray Disc etc.), magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or store with referring to
The desired program code of order or data structure form simultaneously can be by any other medium of computer access, but not limited to this.
Memory can be individually present, and be connected by bus with processor.Memory can also integrate with processor.
Wherein, the memory 203 is used to store the application code for performing the present invention program, and by processor 201
Performed to control.The processor 201 is used to perform the application code stored in the memory 303.
In the specific implementation, as a kind of embodiment, processor 201 can include one or more CPU, such as in Fig. 2
CPU0 and CPU1.
In the specific implementation, as a kind of embodiment, computer equipment 200 can include multiple processors, such as in Fig. 2
Processor 201 and processor 208.Each in these processors can be monokaryon (single-CPU) processor,
It can also be multinuclear (multi-CPU) processor.Here processor can refer to one or more equipment, circuit, and/or
Process cores for processing data (such as computer program instructions).
In the specific implementation, as a kind of embodiment, computer equipment 200 can also include output equipment 205 and input
Equipment 206.Output equipment 205 and processor 201 communicate, and can carry out display information in many ways.For example, output equipment 205
Can be liquid crystal display (liquid crystal display, LCD), Light-Emitting Diode (light emitting diode,
LED) display device, cathode-ray tube (cathode ray tube, CRT) display device, or projecting apparatus (projector) etc..
Input equipment 206 and processor 201 communicate, and can receive the input of user in many ways.For example, input equipment 206 can be with
It is mouse, keyboard, touch panel device or sensing equipment etc..
Above-mentioned computer equipment 200 can be an a general purpose computing device either dedicated computing machine equipment.
In the specific implementation, computer equipment 200 can be desktop computer, portable computer, the webserver, palm PC
(Personal Digital Assistant, PDA), cell phone, tablet personal computer, wireless terminal device, communication equipment, insertion
Formula equipment or the equipment for having similar structures in Fig. 2.The unlimited type for determining computer equipment 200 of the embodiment of the present invention.
If the set top box in Fig. 1 can be the equipment shown in Fig. 2, one or more is stored in the memory of set top box 106
Individual software module.Set top box 106 can realize software module by the program code in processor and memory, realize frequency
Road is switched fast.
If the FCC servers in Fig. 1 can be the equipment shown in Fig. 2, store in the memory of set top box 105 one or
Multiple software modules.Set top box 106 can realize software module by the program code in processor and memory, realize
Channel is switched fast.
Below by terms of the general character being related to based on invention described above, to the embodiment of the present invention further specifically
It is bright.
As shown in figure 3, the method that a kind of channel provided by the invention is switched fast, the multicast server and FCC of the program
The Media Stream that server is sent to set top box is homologous, therefore ensure that the Media Stream that multicast server is sent services with FCC
The media slicing for the Media Stream that device is sent is alignment.Process includes：
S301：User is during TV programme are watched, it is necessary to which switching channels, switch to channel B from channel A, then use
Family sends channel change command by remote control to STB, and the channel change command contains the mark of switching target channel (channel B)
Know.
S302：STB have received the channel change command of remote control, disconnects and channel A multicast links, exit channel A's
Multicast group；And STB sends channel B FCC requests, FCC request bags B containing channel mark to FCC servers.
S303：FCC servers receive the FCC requests that STB is sent, and according to channel B mark, establish STB and FCC and service
The unicast connection of device.After unicast connection is established, in order to allow the quick broadcasting channel B of STB content, FCC servers one are opened
The low bit-rate video stream to begin by mode of unicast to STB push channels B.
Under normal operating conditions, FCC servers receive each channel (including target channel) that multicast server is sent
Media Stream, because FCC servers are intended merely to realize that channel is switched fast, therefore FCC servers will not permanently store reception
To Media Stream, and simply cache the Media Stream of the low bit- rate of target channel and high code check in certain time.Because FCC servers are
The Media Stream that multicast server is sent persistently is received, therefore the Media Stream in FCC server certain times slides equivalent to caching
Window Media Stream.Such as：FCC servers cache the Media Stream of 10 seconds all the time, when there is the new media stream receiver of 1 second,
The earliest Media Stream of 1 second will be abandoned.In order to realize that channel is switched fast, FCC servers in initial procedure, push
It is the burst of low bit- rate, the bandwidth of the content consumption of push is smaller, and push delay is accelerated and reduced to the speed of push, and set top box can
Played with quick startup.
FCC servers have cached the video flowing of each multicast channel of multicast server transmission, these video stream packets in advance
Include low bit- rate and high code check.When the demand of channel switch be present, FCC servers can be quickly by the low rate video stream of caching
STB quickly is sent to, realizes fast channel switching.And each burst of Media Stream is independent, independent of previous
Burst, thus FCC servers when sending the Media Stream of low bit- rate to STB, it is necessary to which the time in Media Stream from caching is earliest
A burst proceed by transmission, it is complete burst one by one that such STB, which receives low bit- rate Media Stream, directly can be with
For playing.
S304：STB receives the video flowing of FCC server push, and calls the embedded players of STB to start video playback.
S305：Due to FCC servers beginning to the STB video flowings sent be low bit- rate, therefore in shorter setting
When the video flowing of the low bit- rate of the target channel of caching has all been sent to STB by interior can, FCC servers are sent to STB
Multicast adds notice, and starts to send the video flowing of channel B high code check to STB.
Specifically, the Media Stream (equivalent to 5 bursts) of 10 seconds low bit- rates of caching is sent to set top box and terminates (knot
The mark of beam is that a complete burst is sent completely).The Media Stream that this set-top box has just had 10 seconds can play, in order to carry
High user's viewing experience, follow-up set top box can play the Media Stream of high code check, therefore FCC server cans stop to machine top
Box sends low bit- rate Media Stream, sends high code check Media Stream elsewhere.
S306：The multicast that STB have received the transmission of FCC servers adds notice, and sending multicast addition to multicast server please
Ask, the multicast adds request bag B containing channel mark.
S307：The multicast that FCC servers receive STB adds request, and according to channel B mark, STB is added into channel
In B multicast group.Now STB adds channel B multicast group, and multicast server starts to push the video flowing of high code check to STB.
S308：STB have received the video flowing of the high code check of multicast server push.As a rule, as technology above
As scheme description, it is transmitted by packet during video streaming, tables of data here is RTP bags.STB is from group
Broadcast server reception is RTP bags one by one, and STB determines to receive the multicast high code rate data of first from multicast server
The sequence number of bag, and send Media Stream to FCC servers and terminate request, the Media Stream terminates request and contains the group of first
Broadcast the sequence number of high code rate data bag.Because each RTP has wrapped sequence number, and the sequence number is with time sequencing
, therefore, as long as sequence number before the sequence number for receiving the multicast high code rate data bag of first from FCC servers
RTP bags, just can be all RTP bag polishings of burst where this RTP bag.Such as：Content corresponding to the big RTP bags of sequence number
Corresponding to the small RTP bags of sequence number behind content.STB will persistently receive the video flowing of high code check from multicast server.
S309：FCC servers receive the Media Stream and terminate request, according to the sequence number of the RTP bags of the first of carrying
Sequence number, determine the burst where the RTP bags, the burst before the sequence number for the RTP bags that above-mentioned first is sent to STB
All RTP bags, all RTP bags of the burst before the sequence number of the RTP bags of above-mentioned first are sent completely, stop to
Set top box sends the video flowing of the high code check of target channel.
Specifically, the Media Stream that set top box receives from FCC servers and multicast server is all homologous video flowing, they
Burst division be identical.Technical scheme introduction as described above, for same content, they corresponding point
Piece is identical, and the packet for transmitting the content is identical, and sequence number corresponding to packet is naturally also identical.Connect from set top box
The Media Stream termination request of receipts contains first multicast high code rate data bag of the target channel received from multicast server
Sequence number, as long as FCC servers are by the packet of the high code check before the sequence number (and first multicast height that set top box receives
Code rate data bag belongs to same burst) set top box is sent to, set top box can will connect from FCC servers and multicast server
The high code check Media Stream received forms an independent burst and played out, and now FCC servers are also required to stop sending out to set top box
Send the video flowing of the second code check of target channel.
S310：STB receives the RTP bags of FCC servers transmission, and the RTP bags received with multicast server carry out one
It is sent to a place under guard and is pressed into an independent high code check burst, realizes the video for playing high code check, while complete being switched fast for channel.
Due to FCC servers send at the beginning be low bit- rate Media Stream, time of the low bit- rate Media Stream of transmission will
Shorten, the Media Stream that set top box receives low bit- rate also just shortens, therefore can that can be within a very short time plays target
The video of channel, therefore shorten set top box stand-by period and the time of channel switch.Further, since the Media Stream of transmission is
Low bit- rate, the bandwidth that the Media Stream transmitted between FCC servers and set top box is consumed will also decrease, and will not cause congestion
Situation, also improve FCC efficiency and performance.
As shown in figure 4, the embodiment of the present invention additionally provides a kind of structural representation of set top box.Set top box 400 includes：The
One transmitting element 401, request is switched fast for being switched fast server transmission channel to channel, the channel is switched fast please
Seek the mark for containing target channel；First receiving unit 402, the mesh is received for being switched fast server from the channel
Mark the Media Stream of the first code check of channel, the first broadcast unit 403, the media of the first code check for playing the target channel
Stream；Second transmitting element 404, for adding notice according to the multicast that server reception is switched fast from the channel, to multicast
Server sends multicast and adds request；Second receiving unit 405, the mesh is received for being switched fast server from the channel
The Media Stream of the second code check of channel is marked, second code check is higher than first code check；3rd receiving unit 406, for from
The multicast server receives the Media Stream of the second code check of the target channel；3rd transmitting element 407, for the frequency
Road is switched fast server and sends Media Stream termination request；Second broadcast unit 408, for being switched fast according to from the channel
The Media Stream of second code check of the target channel that server receives and the target frequency received from the multicast server
The Media Stream of second code check in road, play the Media Stream of the second code check of the target channel.
In the present embodiment, set top box 400 is presented in the form of functional unit.Here " unit " can refer to specific
Application integrated circuit (application-specific integrated circuit, ASIC), circuit, perform one or more
The processor and memory of individual software or firmware program, integrated logic circuit, and/or other can provide the device of above-mentioned function
Part.In a simple embodiment, those skilled in the art is contemplated that the device for preventing internal storage data from losing can be adopted
With the form shown in Fig. 2.First transmitting element 401, the first receiving unit 402, the first broadcast unit 403, the second transmitting element
404, the second receiving unit 405, the 3rd receiving unit 406, the 3rd transmitting element 407 and the second broadcast unit 408 can pass through
Fig. 2 processor and memory is realized.
The embodiment of the present invention additionally provides a kind of computer-readable storage medium, for saving as the set top box shown in above-mentioned Fig. 4
Computer software instructions used, it, which is included, is used to perform the program designed by above method embodiment.By performing storage
Program, it is possible to achieve set top box realizes that channel is switched fast.
As shown in figure 5, the embodiment of the present invention additionally provides a kind of structural representation of FCC servers.FCC servers 500
Including：Handover request receiving unit 501, the channel sent for receiving set up box are switched fast request, and the channel is quickly cut
Change the mark that request contains target channel；Low bit- rate transmitting element 502, for the mark according to the target channel, to institute
State the Media Stream that set top box sends the first code check of the target channel；Transmitting element 503 is notified, for when in setting time
After the completion of the media stream of first code check of the target channel, send multicast to the set top box and add notice；High code check
Transmitting element 504, the Media Stream of the second code check for sending the target channel to the set top box, the second code check is higher than the
One code check；Request reception unit 505 is terminated, request is terminated for receiving the Media Stream that the set top box is sent；Stop element
506, the Media Stream of the second code check for stopping sending the target channel to the set top box.
In the present embodiment, FCC servers 500 are presented in the form of functional unit.Here " unit " can refer to
ASIC (application-specific integrated circuit, ASIC), circuit, perform one
Or the processor and memory of multiple softwares or firmware program, integrated logic circuit, and/or other can provide above-mentioned function
Device.In a simple embodiment, those skilled in the art is contemplated that the device for preventing internal storage data from losing can be with
Using the form shown in Fig. 2.Handover request receiving unit 501, low bit- rate transmitting element 502, notify transmitting element 503, high code
Rate transmitting element 504, terminates request reception unit 505 and stop element 506 can be by Fig. 2 processor and memory come real
It is existing.
The embodiment of the present invention additionally provides a kind of computer-readable storage medium, for saving as the FCC services shown in above-mentioned Fig. 5
Computer software instructions used in device, it, which is included, is used to perform the program designed by above method embodiment.By performing storage
Program, it is possible to achieve FCC servers realize that channel is switched fast.
It should be understood by those skilled in the art that, embodiments herein can be provided as method or computer program product.
Therefore, the application can be using the embodiment in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Form.Deposited moreover, the application can use to can use in one or more computers for wherein including computer usable program code
The shape for the computer program product that storage media is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The application is with reference to the flow according to the method for the embodiment of the present application, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The equipment for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of equipment, the commander equipment realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Although having been described for the preferred embodiment of the application, those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the application scope.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the application to the application
God and scope.So, if these modifications and variations of the application belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprising including these changes and modification.
Claims (10)
1. a kind of method that channel is switched fast, it is characterised in that including：
Server transmission channel is switched fast to channel and is switched fast request, and the channel is switched fast request and contains target frequency
The mark in road；
The Media Stream of the first code check of the server reception target channel is switched fast from the channel, plays the target frequency
The Media Stream of first code check in road；
Multicast according to server reception is switched fast from the channel adds notice, and sending multicast addition to multicast server please
Ask；
The Media Stream of the second code check of the server reception target channel is switched fast from the channel, second code check is high
In first code check；
The Media Stream of the second code check of the target channel is received from the multicast server；
Server, which is switched fast, to the channel sends Media Stream termination request；
According to the Media Stream of the second code check of the target channel that server reception is switched fast from the channel and from described
The Media Stream of second code check of the target channel that multicast server receives, the matchmaker for playing the second code check of the target channel
Body stream.
2. according to the method for claim 1, it is characterised in that including：It is described to be switched fast server from the channel and connect
The media stream bearing of the second code check of target channel is received in unicast high code rate data bag, it is described to be received from the multicast server
The media stream bearing of second code check of the target channel is in multicast high code rate data bag.
3. according to the method for claim 2, it is characterised in that the basis is switched fast server from the channel and received
The target channel the second code check Media Stream and from the multicast server receive the target channel second code
The Media Stream of rate, the Media Stream of the second code check of the target channel is played, is specifically included：
Received by the unicast high code rate data bag that server reception is switched fast from the channel and from the multicast server
Multicast high code rate data bag is decoded into a burst, plays the burst.
4. a kind of method that channel is switched fast, it is characterised in that including：
The channel that receiving set up box is sent is switched fast request, and the channel is switched fast the mark that request contains target channel
Know；
According to the mark of the target channel, to the Media Stream of the first code check of the set top box transmission target channel；
After the completion of the media stream of the first code check of the target channel in setting time, to the set top box transmission group
Addition notice is broadcast, and sends to the set top box Media Stream of the second code check of the target channel, the second code check is higher than the
One code check；
Receive the Media Stream that the set top box is sent and terminate request, stop sending the second of the target channel to the set top box
The Media Stream of code check.
5. method according to claim 4, it is characterised in that including：The media stream bearing of second code check of the target channel
In unicast high code rate data bag.
6. according to the method for claim 5, it is characterised in that described
The Media Stream termination request for receiving the set top box and sending, stops sending the target channel to the set top box
The Media Stream of second code check, is specifically included：
Receive the Media Stream that the set top box is sent and terminate request, the Media Stream terminates request and contains first multicast height code
The sequence number of rate packet, wherein, the multicast high code rate data bag carries the set top box and connect from the multicast server
The Media Stream of second code check of the target channel received；
The unicast high code rate data bag corresponding to sequence number before the sequence number of first multicast high code rate data bag
After being sent completely, stop sending the Media Stream of the second code check of the target channel to the set top box.
A kind of 7. set top box, it is characterised in that including：
First transmitting element, request is switched fast for being switched fast server transmission channel to channel, the channel is quickly cut
Change the mark that request contains target channel；
First receiving unit, the media of the first code check for being switched fast the server reception target channel from the channel
Stream,
First broadcast unit, the Media Stream of the first code check for playing the target channel；
Second transmitting element, for adding notice according to the multicast that server reception is switched fast from the channel, taken to multicast
Business device sends multicast and adds request；
Second receiving unit, the media of the second code check for being switched fast the server reception target channel from the channel
Stream, second code check are higher than first code check；
3rd receiving unit, the Media Stream of the second code check for receiving the target channel from the multicast server；
3rd transmitting element, Media Stream termination request is sent for being switched fast server to the channel；
Second broadcast unit, for the second code check according to the target channel that server reception is switched fast from the channel
Media Stream and the target channel received from the multicast server the second code check Media Stream, play target frequency
The Media Stream of second code check in road.
8. set top box according to claim 7, it is characterised in that including：Second broadcast unit, specifically for will be from
The multicast height code that the channel is switched fast the unicast high code rate data bag of server reception and received from the multicast server
Rate decoded packet data plays the burst into a burst, wherein, it is described to be switched fast server from the channel and receive target
The media stream bearing of second code check of channel is in unicast high code rate data bag, the mesh received from the multicast server
The media stream bearing of the second code check of channel is marked in multicast high code rate data bag.
9. a kind of channel is switched fast server, it is characterised in that including：
Handover request receiving unit, the channel sent for receiving set up box are switched fast request, and the channel is switched fast please
Seek the mark for containing target channel；
Low bit- rate transmitting element, for the mark according to the target channel, the target channel is sent to the set top box
The Media Stream of first code check；
Transmitting element is notified, for after the completion of the media stream of the first code check of the target channel in setting time,
Multicast, which is sent, to the set top box adds notice；
High code check transmitting element, the Media Stream of the second code check for sending the target channel to the set top box, second code
Rate is higher than the first code check；
Request reception unit is terminated, request is terminated for receiving the Media Stream that the set top box is sent；
Stop element, the Media Stream of the second code check for stopping sending the target channel to the set top box.
10. channel according to claim 9 is switched fast server, it is characterised in that the termination request reception unit, specifically
Request is terminated for receiving the Media Stream that the set top box is sent, the Media Stream terminates request and contains first multicast height code
The sequence number of rate packet, wherein, the multicast high code rate data bag carries the set top box and connect from the multicast server
The Media Stream of second code check of the target channel received；
The stop element, for described corresponding to the sequence number before the sequence number of first multicast high code rate data bag
After unicast high code rate data bag is sent completely, stop sending the media of the second code check of the target channel to the set top box
Stream, wherein, the media stream bearing of the second code check of the target channel sent to set top box is in unicast high code rate data bag.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610514886.0A CN107566855B (en) | 2016-06-30 | 2016-06-30 | Method for quickly switching channels, server and set top box |
| PCT/CN2017/089790 WO2018001184A1 (en) | 2016-06-30 | 2017-06-23 | Fast channel change method, server and set-top box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610514886.0A CN107566855B (en) | 2016-06-30 | 2016-06-30 | Method for quickly switching channels, server and set top box |
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| Publication Number | Publication Date |
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| CN107566855A true CN107566855A (en) | 2018-01-09 |
| CN107566855B CN107566855B (en) | 2020-11-10 |
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| CN201610514886.0A Active CN107566855B (en) | 2016-06-30 | 2016-06-30 | Method for quickly switching channels, server and set top box |
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| WO (1) | WO2018001184A1 (en) |
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| CN107566855B (en) | 2020-11-10 |
| WO2018001184A1 (en) | 2018-01-04 |
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