CN106341727A

CN106341727A - Channel switching method and apparatus, and video terminal

Info

Publication number: CN106341727A
Application number: CN201610878858.7A
Authority: CN
Inventors: 严国斌; 赵成; 艾本仁; 吴金辉; 鲍海兵
Original assignee: BEIJING BAUSTEM INFORMATION TECHNOLOGY Co Ltd
Current assignee: BEIJING BAUSTEM INFORMATION TECHNOLOGY Co Ltd
Priority date: 2016-10-08
Filing date: 2016-10-08
Publication date: 2017-01-18

Abstract

The invention discloses a channel switching method and apparatus, and a video terminal. The channel switching method comprises the following steps: obtaining program data corresponding to a current channel and a prediction channel; according to the program data corresponding to the current channel, performing playing, wherein the current channel is a program channel output to a display device; and when a channel switching request is received, according to the channel switching request, setting the corresponding prediction channel as the current channel, and playing program data corresponding to the switched current channel. According to the invention, through preparing the program data corresponding to the current channel and the prediction channel, the data corresponding to the prediction channel and the current channel is downloaded from a network side and cached locally, and when a channel which is requested by a user for switching is corresponding to a certain prediction channel, screen display can be switched to an image of the prediction channel according to already locally existing correlation data of the prediction channel. Therefore, the processing time during channel switching can be reduced, the switching speed is quite rapid, and application experience of the user is improved.

Description

A kind of channel switching method and device and video terminal

Technical field

The present invention relates to video display arts field, espespecially a kind of channel switching method and device and video terminal.

Background technology

User in the video terminal using intelligent digitalized television terminal etc it is often necessary to switching TV channel, During channel switch, need according to target channel number, to the corresponding video pictures of the corresponding network address request of network side, due to relating to And the interaction to network side, the acquisition of picture needs certain response time, and speed is slower, and user may see one on screen The blank screen of section time, Consumer's Experience is poor.

For the problems referred to above, generally adopt in prior art to improve Consumer's Experience with the following method: waiting new switching Channel picture out before, keep switching before channel last frame picture, during the method only avoid switching channels Blank screen problem, there is no any lifting to switching channels speed, Consumer's Experience is still poor.

Further, it is also possible to improve the speed of channel switch using other another way: the service of network front end program source When receiving terminal request program video, the video data being sent to user includes reference frame and coded frame, reference frame for device side For the image completing, the image of coded frame, based on reference frame, encodes to the part having differences, program source server A reference frame can be sent at set intervals, therefore, if terminal receives video data, receive for reference frame, So still can not broadcast video, terminal could start after only receiving first reference frame to show video pictures, in order to ensure Terminal one can arrange program source server so that program source server sends with frame out after receiving video data at once Started with reference frame to the video program content data of terminal, so, just can improve terminal and broadcast switching in channel switch The speed of the video content of channel guarantees that terminal one at once can be with frame out, because terminal only receives after receiving video data afterwards Could start after first reference frame to show video pictures.The problem of this method is to need front end and terminal cooperation, and server removes In addition it is also necessary to corresponding reference frame and coded frame be sent according to the video request of terminal, system is multiple beyond completing the work encoding Miscellaneous, and it is still desirable to the speed of the startup of the interaction of network side and player, therefore channel switch for terminal side Still not rapid, the experience of user can be affected.

Content of the invention

In order to solve the above problems, the present invention proposes a kind of channel switching method and device and video terminal, can Improve switch speed during channel switch.

In order to achieve the above object, the present invention proposes a kind of channel switching method, and methods described includes:

Obtain current channel and the corresponding program data of predictive channel；Broadcast according to the corresponding program data of current channel Put；

Described current channel is the program channel exporting to display device；The number of current channel is one, predictive channel Number be one or more；

After receiving channel switch request, according to channel switch request, corresponding predictive channel is set to current channel, And played out according to the corresponding program data of current channel after switching.

Preferably, described acquisition current channel and the corresponding program data of predictive channel before, described channel switching method Also include: the setting corresponding predictive channel of current channel；

Described setting the corresponding predictive channel of current channel as follows at least one be configured:

Mode 1-1: during the channel n that current channel is being watched for user, corresponding for current channel predictive channel is arranged Be including the first predictive channel and ,/or the second predictive channel；

Wherein, described first predictive channel is set to channel n+a1；Described second predictive channel is set to channel n-b1；Its In, a1 is the integer sequence that minimum of a value is that 1 maximum is a1, and b 1 for the integer sequence that minimum of a value is that 1 maximum is b1, a1 is Positive integer, b1 is positive integer；

Mode 1-2: during the channel n that current channel is being watched for user, corresponding for current channel predictive channel is arranged It is including the 4th predictive channel；

Wherein, described 4th predictive channel is set to the channel n0 of viewing before user；

Mode 1-3: during the channel n that current channel is being watched for user, the corresponding predictive channel of current channel is set to Including the 5th predictive channel；

Wherein, described 5th predictive channel is set to the user priority viewing channel drawing according to the statistical method of prediction； The statistical method of described prediction includes: by channel settings the longest for viewing time in predetermined timing statisticses or that viewing number of times is most User priority watches channel.

Preferably, before described acquisition current channel and the corresponding program data of predictive channel, described channel switch side Method also includes:

Receive plus-minus channel switch request, when receiving plus-minus channel switch request, according to described plus-minus channel switch Switching state is opened in request, and in switching state, execution is described to obtain current channel and the corresponding program data of predictive channel Step；

Before described acquisition current channel and the corresponding program data of predictive channel, described channel switching method also includes: The setting corresponding predictive channel of current channel；

The described setting corresponding predictive channel of current channel is configured as follows:

Mode 1-4: during the channel n that current channel is being watched for user, corresponding for current channel predictive channel is arranged It is including the 3rd predictive channel；

Wherein, described plus-minus channel switch request includes channel and adds a handover request and channel down a handover request；

When described plus-minus channel switch request adds a handover request for channel, described 3rd predictive channel is set to channel n+c1；C1 is positive integer for the integer sequence that minimum of a value is that 1 maximum is c1, c1；

When described first channel switch request is channel down a handover request, described 3rd predictive channel is set to channel n-d1；D1 is positive integer for the integer sequence that minimum of a value is that 1 maximum is d1, d1.

Preferably, described acquisition current channel and the corresponding program data of predictive channel include arbitrary in following manner Kind: program data includes at least one in frequency signal, demultiplexed signal and decoded signal；

Mode 2-1: obtain described current channel and predictive channel corresponding frequency signal respectively；

Signal according to the corresponding frequency of each frequency；Obtain the corresponding demultiplexed signal of each channel respectively；

According to the corresponding demultiplexed signal of each channel, obtain the corresponding decoded signal of each channel；Delayed by buffer area Deposit the described corresponding decoded signal of each channel；

Corresponding for current channel decoded signal is presented by display device；

Mode 2-2: obtain described current channel and predictive channel corresponding frequency signal respectively；

According to each frequency corresponding frequency signal；Obtain the corresponding demultiplexed signal of current channel respectively and correspond to The corresponding demultiplexed signal of each predictive channel, and it is corresponding to cache current channel by the buffer area of setting in home gateway Demultiplexed signal and the corresponding demultiplexed signal of each predictive channel；

According to the corresponding demultiplexed signal of current channel, obtain the corresponding decoded signal of current channel；

Mode 2-3: obtain described current channel and predictive channel corresponding frequency signal respectively；

The corresponding demultiplexed signal of current channel is cached by the buffer area of setting in home network terminal and each is pre- The corresponding demultiplexed signal of measured channel；

Mode 2-4: obtain described current channel and predictive channel corresponding frequency signal respectively；

According to the corresponding demultiplexed signal of each predictive channel, obtain that each predictive channel is corresponding to be exported to display device Decoded signal；

Corresponding for current channel decoded signal is presented by display device.

Preferably, in described buffer area, the demultiplexed signal of caching includes channel corresponding pat, pmt bag, predetermined frame The program stream data of number and the empty bag of padding；The program stream data of described predetermined frame number is to cache the program of up-to-date acquisition Flow data；

Wherein, the empty bag of described pat, pmt bag, the program stream data of predetermined frame number and padding is according to from top to bottom Be stored sequentially in storehouse.

Preferably, described predetermined frame number is set greater than or is equal to decoder starting the required minimum frame number of decoding.

In order to solve above-mentioned technical problem, the invention allows for a kind of channel switching mechanism, described device includes:

Data capture unit, for obtaining current channel and the corresponding program data of predictive channel；Described current channel is Export to the program channel of display device；The number of current channel is one, and the number of predictive channel is one or more；

Broadcast unit, for playing out according to the corresponding program data of current channel；And please receiving channel switch After asking, played out according to the corresponding program data of current channel after switching；

Switch unit, for when receiving channel switch request, according to channel switch request, corresponding predictive channel being set It is set to current channel.

Preferably, described channel switching mechanism also includes predicting unit, and described predicting unit is used for working as after setting switches The corresponding predictive channel of front channel.

Preferably, described predicting unit is additionally operable to arrange the corresponding predictive channel of current channel；

Described predicting unit includes at least one of following prediction module:

First prediction module, during the channel n watching for user for current channel, by corresponding for current channel prediction Channel be set to including the first predictive channel and ,/or the second predictive channel；

Second prediction module, during the channel n watching for user for current channel, by corresponding for current channel prediction Channel is set to including the 4th predictive channel；

3rd prediction module, during the channel n watching for user for current channel, the corresponding pre- frequency measurement of current channel Road is set to including the 5th predictive channel；

Preferably, described switch unit is additionally operable to:

Receive plus-minus channel switch request, when receiving plus-minus channel switch request, according to described plus-minus channel switch Switching state is opened in request, and in switching state, executes described at least two channels that obtain by data capture unit and correspond to Program data step；

Described predicting unit is additionally operable to: the setting corresponding predictive channel of current channel；

Described predicting unit also includes following prediction module:

5th prediction module, during the channel n watching for user for current channel, by corresponding for current channel prediction Channel is set to including the 3rd predictive channel；

Preferably, described data capture unit includes any one of following data acquisition module:

First data acquisition module, described first data acquisition module includes:

First frequency submodule, for obtaining the signal of the corresponding frequency of described at least two channels respectively；

First demultiplex module, for the signal according to the corresponding frequency of each frequency；Obtain each channel pair respectively The demultiplexed signal answered；

First decoding sub-module, for according to the corresponding demultiplexed signal of each channel, obtaining the corresponding solution of each channel Code signal,

First display sub-module, for being assumed corresponding for current channel decoded signal by display device；

Second data acquisition module, described second data acquisition module includes:

Second frequency submodule, for obtaining the signal of the corresponding frequency of described at least two channels respectively；

Second demultiplex module, for the signal according to the corresponding frequency of each frequency；Obtain current channel pair respectively The demultiplexed signal answered and the corresponding demultiplexed signal of each predictive channel corresponding, and current by home gateway caching The corresponding demultiplexed signal of channel and the corresponding demultiplexed signal of each predictive channel；

Second decoding sub-module, for according to the corresponding demultiplexed signal of current channel, obtaining the corresponding solution of current channel Code signal,

Second display sub-module, for being assumed corresponding for current channel decoded signal by display device；

3rd data acquisition module, described 3rd data acquisition module includes:

3rd frequency submodule, for obtaining the signal of the corresponding frequency of described at least two channels respectively；

3rd demultiplex module, for the signal according to the corresponding frequency of each frequency；Obtain current channel pair respectively The demultiplexed signal answered and the corresponding demultiplexed signal of each predictive channel corresponding, and current by home gateway caching The corresponding demultiplexed signal of channel and the corresponding demultiplexed signal of each predictive channel；

The corresponding demultiplexed signal of current channel and the corresponding solution of each predictive channel are cached by home network terminal Multiplexed signals；

3rd decoding sub-module, for according to the corresponding demultiplexed signal of current channel, obtaining current channel corresponding defeated Go out to the decoded signal of display device,

3rd display sub-module, for being assumed corresponding for current channel decoded signal by display device；

4th data acquisition module, described 4th data acquisition module includes:

4th frequency submodule, for obtaining the signal of the corresponding frequency of described at least two channels respectively；

4th demultiplex module, for the signal according to the corresponding frequency of each frequency；Obtain current channel pair respectively The demultiplexed signal answered and the corresponding demultiplexed signal of each predictive channel corresponding, and current by home gateway caching The corresponding demultiplexed signal of channel and the corresponding demultiplexed signal of each predictive channel；

4th decoding sub-module, for according to the corresponding demultiplexed signal of each predictive channel, obtaining each predictive channel Corresponding export to the decoded signal of display device；

According to the corresponding demultiplexed signal of current channel, obtain corresponding output of current channel and believe to the decoding of display device Number；

4th display sub-module, for being assumed corresponding for current channel decoded signal by display device.

Preferably, in described buffer area, the demultiplexed signal of caching includes channel corresponding pat, pmt bag, predetermined frame The program stream data of number and the empty bag of padding；The program stream data of described predetermined frame number is the up-to-date program that caching obtains Flow data；

In order to solve above-mentioned technical problem, the invention allows for a kind of video terminal, described video terminal includes above-mentioned Any one channel switching mechanism.

Compared with prior art, the technical scheme that the present invention provides includes: run two or more broadcasting examples, Described broadcasting example includes currently playing example and standby broadcasting example, and wherein, currently playing example is output to display device Broadcasting example, the number of currently playing example is one, and described currently playing example and standby broadcasting example correspond to difference Channel；When receiving channel switch request, according to channel switch request, standby broadcasting example accordingly is set to currently broadcast Put example.By the solution of the present invention, run two or more broadcasting examples, including currently playing example and standby simultaneously With playing example, currently playing example corresponds to the channel play, and standby broadcasting example is the same with currently playing example, Corresponding picture is all downloaded to locally from network side, does not simply export screen display, when the channel of user's request switching corresponds to It is not necessary to corresponding video data is asked to network side according to channel number when standby broadcasting example, save and network top-cross The mutual time is it is not required that closing current player and opening new player, but directly switches to locally screen display The existing standby picture playing example, therefore, switch speed is very fast, improves user experience.

Brief description

Below the accompanying drawing in the embodiment of the present invention is illustrated, the accompanying drawing in embodiment is for entering one to the present invention Step understands, is used for explaining the present invention, does not constitute limiting the scope of the invention together with specification.

The flow chart that Fig. 1 a and Fig. 1 b is respectively channel switching method provided in an embodiment of the present invention；

Fig. 2 a is the configuration diagram of home videos network system provided in an embodiment of the present invention；

The stream of Fig. 2 b, Fig. 2 c and Fig. 2 d channel switching method respectively based on the home videos network system shown in Fig. 2 a Journey schematic diagram；

Fig. 3 a, 3b, 3c, 3d are respectively the schematic diagram that multiple broadcasting example provided in an embodiment of the present invention runs simultaneously；

Fig. 4 is the structure composition schematic diagram of channel switching mechanism provided in an embodiment of the present invention.

Specific embodiment

For the ease of the understanding of those skilled in the art, the invention will be further described below in conjunction with the accompanying drawings, not Can be used for limiting the scope of the invention.It should be noted that in the case of not conflicting, the embodiment in the application and reality The various modes applied in example can be mutually combined.

Referring to Fig. 1 a, the present invention proposes a kind of channel switching method, and methods described includes:

Step 20, acquisition current channel and the corresponding program data of predictive channel；Described current channel is output to display The program channel of equipment；The number of current channel is one, and the number of predictive channel is one or more；

Step 25, played out according to the corresponding program data of current channel；

Step 30, when receiving channel switch request, according to channel switch request, corresponding predictive channel is set to work as Front channel, plays out according to the corresponding program data of current channel after switching.

In the embodiment of the present invention, after step 30, also include:

The corresponding predictive channel of current channel after step 40, setting switching.

In the embodiment of the present invention, by preparing current channel and the corresponding program data of predictive channel, by predictive channel and The corresponding data of current channel is all downloaded from network side and is buffered in local, when the channel of user's request switching is pre- corresponding to certain During measured channel, according to the related data of locally existing predictive channel, screen display can be switched to the picture of predictive channel, Therefore, it can reduce process time during channel switch, switch speed is very fast, improves user experience.

In the embodiment of the present invention, before described acquisition current channel and the corresponding program data of predictive channel, described channel Changing method also includes: step 10, the setting corresponding predictive channel of current channel；

Wherein, described setting the corresponding predictive channel of current channel as follows at least one be configured:

For example, when a1 is 1 for 1, b1, the first predictive channel is set to channel n+1, the second predictive channel is set to channel n- 1；When a1 is 2 for 2, b1, the first predictive channel is set to channel n+1 and n+2, the second predictive channel is set to channel n-1 and n- 2；

It is appreciated that the corresponding predictive channel of current channel after setting switching is carried out in the same manner.

In the embodiment of the present invention, before described acquisition current channel and the corresponding program data of predictive channel, described frequency Channel switching method also includes:

For example, when c1 is 1, the 3rd predictive channel is set to channel n+1；When c1 is 2, the 3rd predictive channel is set to channel N+1 and n+2；

For example, when d1 is 1, the 3rd predictive channel is set to channel n-1；When d1 is 2, the 3rd predictive channel is set to channel N-1 and n-2；

In the embodiment of the present invention, described acquisition current channel and the corresponding program data of predictive channel are included in following manner Any one: program data includes at least one in frequency signal, demultiplexed signal and decoded signal；

According to the corresponding demultiplexed signal of each channel, obtain the corresponding decoded signal of each channel,

According to each frequency corresponding frequency signal；Obtain the corresponding demultiplexed signal of current channel respectively and correspond to The corresponding demultiplexed signal of each predictive channel, and by home gateway cache the corresponding demultiplexed signal of current channel, with And the corresponding demultiplexed signal of each predictive channel；

In the embodiment of the present invention, in described buffer area, the demultiplexed signal of caching includes channel corresponding pat, pmt The empty bag of bag, the program stream data of predetermined frame number and padding；The program stream data of described predetermined frame number is that caching obtains Up-to-date program stream data；

Wherein, described predetermined frame number is set greater than or is equal to decoder starting the required minimum frame number of decoding.Namely Say, above-mentioned predetermined frame number is the minimum frame number starting decoding no less than decoder, for the program stream data of predetermined frame number, The quantity of corresponding gop can be configured, and the data of the empty bag of padding can also be configured；One or more gop sections Mesh stream is continually updated into up-to-date data during caching；When cutting platform, the data of buffer area can instantaneously be filled into be broadcast Put in the decoding buffer zone of device, player gets pat, meeting after pmt bag, the program stream of one or more gop in the very first time Get started decoding, thus reaching the purpose quickly cutting platform, due to caching is nearest gop, and player can reach almost The effect of zero-lag.

With reference to specific system architecture, aforesaid way 2-1, mode 2-2, mode 2-3 and mode 2-4 are carried out in detail Describe in detail bright.

Referring to Fig. 2 a, it is the configuration diagram of home videos network system provided in an embodiment of the present invention, as shown in Figure 2 a, Home videos network system includes home gateway 10 and home network terminal 20；Home gateway 10 includes tuner resource 11, demultiplexes With unit 12, content transmission subsystem 13, content transmission subsystem 13 includes buffering area 131 and transport module 132.Tuner provides Source 11 is used for receiving and demodulate the corresponding radiofrequency signal of frequency, comprises the program of multiple logical channel numbers in a frequency Stream, together, the demodulated signal that demultiplexing unit 12 exports to tuner resource 11 demultiplexes the data-reusing of multiple program streams With obtaining the program stream of single logical channel numbers, buffering area in content transmission subsystem 13 for the program stream after demultiplexing 131 enter row cache, and transport module 132 is transmitted to the data of buffering area 131.The data of transport module 132 output is network Media Stream, can be by home network transmission to each home network terminal 20.

The equipment locally referring to home gateway or home network terminal etc in the embodiment of the present invention, is used for being different from net Network side.

In the embodiment of the present invention, predictive channel can be obtained it is also possible to pass through according to default mode by home gateway Home network terminal obtains predictive channel according to default mode, wherein, default mode in the manner described above 1-1, mode 1-2, With described in mode 1-3.

If home network terminal obtains predictive channel, home network terminal can pass through avt's Setnexttransporturi notifies home gateway to carry out the caching of related data.

Wherein, multiple tuner111 can be included in tuner resource 11, multiple demultiplexing in demultiplexing unit 12, can be included With module 121, for demultiplexing to the signal of each tuner111 output respectively, content transmission subsystem 13 can include Multiple buffering area 13, for buffering the program stream of each demultiplexing module 121 output.

Wherein, the number of tuner111 preferably 2 or 3.

Home network terminal 20 includes content transmission subsystem 21 and player unit 22, wherein, content transmission subsystem 21 are used for receiving the program stream of logical channel numbers by home network, and player unit 22 is used for the program stream receiving is solved Code, and broadcasted.Wherein, multiple buffering area 211 can be included in content transmission subsystem 21, permissible in player unit 22 Including multiple players 221, for being decoded to the signal of each buffering area 211 output respectively.

Channel switching method provided in an embodiment of the present invention also supports dlna environment, the embodiment of the present invention under dlna environment The channel switching method providing can also run.

Referring to Fig. 2 b, it is that the flow process of the channel switching method being proposed based on the home videos network system shown in Fig. 2 a is illustrated Figure.As shown in Figure 2 b, the channel switching method that the embodiment of the present invention proposes includes:

Step 110, tuner resource 11 demodulate the signal of one or more frequencies.

Referring to Fig. 2 c, step 110 specifically includes:

Step 1101, according to predetermined prediction rule, and logical channel numbers n1 of current broadcast items, obtain corresponding Standby logical channel numbers ni (1 < i < s+1), wherein, the number of logical channel numbers n1 is one, standby logical channel numbers ni Number is s-1, and that is, the number of standby logical channel numbers ni can be one or more；S is the integer more than or equal to 2.

In the present embodiment, the total number of current logic channel and standby logical channel is s.

For example, s is 3, then standby logical channel numbers include standby logical channel numbers n2 and logical channel numbers n3；Wherein, n2 =n1-1；N3=n1+1；

Step 1102, according to standby logical channel numbers ni, obtains the corresponding standby frequency of each standby logical channel numbers ni；

Step 1103, according to standby frequency, home gateway 10 obtains the corresponding signal of each frequency from network side, and passes through Tuner resource 11 demodulates the corresponding signal of each frequency respectively.

For example, when the logical channel numbers of current broadcast items are n, the corresponding frequency of logical channel numbers n is f1, according to pre- Fixed prediction rule, the logical channel numbers needing the program caching in advance are n+1 and n-1；Obtain logical channel numbers n+1 corresponding Frequency is f2, and the corresponding frequency of logical channel numbers n-1 is f3, then, home gateway 10 obtains frequency f1, f2, f3 from network side Corresponding signal, and the corresponding signal of frequency f1, f2, f3 is demodulated respectively by tuner resource 11.

In this example, with logical channel numbers as n, n+1 and n-1 illustrate as a example corresponding respectively to different frequencies, this Outer logical channel numbers can correspond to identical frequency for n, n+1 and n-1, or two of which logical channel numbers are corresponding to identical Frequency.For example, in one example, the corresponding frequency of logical channel numbers n is f1, and the corresponding frequency of logical channel numbers n+1 is F1, the corresponding frequency of logical channel numbers n-1 is f2, then, home gateway 10 obtains the corresponding letter of frequency f1 and f2 from network side Number, from frequency f1, demultiplexing obtains logical channel numbers n and each self-corresponding program stream of logical channel numbers n+1, from frequency f2 Demultiplexing obtains the corresponding program stream of logical channel numbers n-1.

Step 120, demultiplexing unit 12 demultiplex to the demodulated signal of tuner resource 11 output respectively, obtain list The program stream of individual logical channel numbers；

Buffering area 131 in step 130, content transmission subsystem 13 each program to demultiplexing unit 12 output respectively Flow to row cache.

The number of buffering area 131 corresponds to the number sum of current logic channel and standby logical channel.For example, currently patrol Collecting channel number is 1, and standby logical channel number is 2, then the number of buffering area 131 is 3.

Wherein, the program stream of a length of 5s when each buffering area 131 stores.

Step 140, transport module 132 are used for the data is activation caching buffering area 131 to home network terminal 10.

In above-mentioned example, respectively the demodulated signal of tuner resource 11 output is demultiplexed with demultiplexing unit 12, obtain Illustrate to as a example the program stream of single logical channel numbers, in addition it is also possible to it is corresponding to be set to only current logic channel number Program stream is demultiplexed.

	tuner	Demultiplexing module	Buffering area	Transmission range
					Framework 1	1～s	s	s	s
Framework 2	1～s	s	s	1
					Framework 3	1～s	s	1	1
Framework 4	1～s	1	1	1

Multiple building forms of modules in table 1 home gateway

In conjunction with shown in table 1, the total number of current logic channel and standby logical channel is s, and each logical channel is permissible The identical or different frequency of correspondence, therefore, the number of frequency is 1～s, and wherein, the number of frequency corresponds to current logic frequency The frequency sum of road and standby logical channel.

According to predetermined set-up mode, in demultiplexing unit 12, the number of demultiplexing module 121 can be 1 or s, In the case that the number of demultiplexing module 121 is s, demultiplexing unit 12 demodulated signal to tuner resource 11 output respectively Demultiplexed, obtained current logic channel and the corresponding program stream of each standby logical channel numbers；In demultiplexing module 121 In the case that number is 1, demultiplexing unit 12 demodulated signal that tuner resource 11 corresponding to current logic channel exports respectively Demultiplexed, obtained the corresponding program stream of current logic channel.

Because the demultiplexing module 121 in demultiplexing unit 12 is generally realized in the way of hardware circuit, it is therefore preferable that Ground, the number of demultiplexing module 121 is set to multiple, can be by controlling so that one of, part, or all solutions Multiplexing module 121 is in running order.

According to predetermined set-up mode, in content transmission subsystem 13, the number of buffering area 131 can be 1 or s, In the case that the number of buffering area 131 is s, buffering area 131 demultiplexed data to the output of each demultiplexing module 121 respectively Flow to row cache, obtain current logic channel and the corresponding demultiplexed data stream of each standby logical channel numbers；In buffering area 131 Number be 1 in the case of, the corresponding demultiplexed data of current logic channel that buffering area 131 exports to demultiplexing module 121 Flow to row cache.That is, for standby logical channel corresponding demultiplexed data stream, buffering area does not enter row cache.

In the case that the number of demultiplexing module 121 is set to s and is completely in working condition, buffering area 131 Number could be arranged to 1 or s, in the case that the number of demultiplexing module 121 is set to 1, the number of buffering area 131 May be only configured to 1.

According to the transmission means of setting, in content transmission subsystem 13, the number of transport module 132 is 1 or s, In the case that the number of transport module 132 is s, the program stream that each buffering area 131 can be stored by content transmission subsystem 13 All it is sent to home network terminal 20, it is also possible to according to home network eventually in the case that the number of transport module 132 is 1 The request at end 20, corresponding for current logic channel number program stream is sent to home network terminal 20.

In the case that the number of buffering area 131 is set to s, the number of transport module 132 could be arranged to 1 or s Individual, in the case that the number of buffering area 131 is set to 1, the number of transport module 132 may be only configured to 1.

Fig. 2 a show the corresponding structure of framework 1 in table 1.

Referring to Fig. 2 d, it is that the flow process of the channel switching method being proposed based on the home videos network system shown in Fig. 2 a is illustrated Figure.As shown in Figure 2 d, the channel switching method that the embodiment of the present invention proposes includes:

Buffering area 211 in step 160, content transmission subsystem 20 receives each transmission range in home gateway 10 respectively 132 network media streams passing through network transmission；Wherein, the number of buffering area 211 is s, and s is current logic channel number and standby Logical channel numbers sum；

The program stream that step 170, player 22 cache to buffering area 211 is decoded, and obtains decoded view data.

Step 180, player 22 export decoded view data to display device.

Wherein, display device is shown without in figure.

In above-mentioned example, received respectively in content transmission subsystem 13 with the buffering area 211 in content transmission subsystem 20 Transmission range 132 illustrate by as a example the network media stream of network transmission, for example, as shown in Figure 2 a, content transmission subsystem It is corresponding that three buffering areas 211 in system 20 receive logical channel numbers n+1 corresponding network media stream, logical channel numbers n respectively Network media stream and logical channel numbers n-1 corresponding network media stream, additionally, the number of buffering area 211 it can also be provided that 1, buffering area 211 only receives the corresponding program stream of current logic channel.

In above-mentioned example, current logic channel is only received for 1 and player 22 with the number of player 22 corresponding slow Illustrate as a example the program stream rushing area 211 transmission, additionally, it is also possible to will broadcast in the case that buffering area 211 is set to s The number putting device 22 is set to s, and each player receives the program stream of each buffering area 211 transmission respectively, and respectively to section Mesh stream is decoded obtaining view data, wherein, has obtained decoded current logic channel and whole standby logical channel pair The view data answered, and corresponding for current logic channel view data is exported to display device.

Referring to Fig. 1 b, the present invention proposes a kind of channel switching method, and methods described includes:

Step 100, runs two or more broadcasting examples, and described broadcasting example includes currently playing example and standby With playing example, wherein, currently playing example is the broadcasting example exporting to display device, and the number of currently playing example is one Individual, described currently playing example and standby broadcasting example correspond to different channels；

In the embodiment of the present invention, play example and be divided into two kinds, one kind is currently playing example, one kind is standby broadcasting in fact Example, the number of currently playing example is one, and the standby number playing example is one or more.It is also assumed that it is current Playing example and standby broadcasting example is the different attribute playing example, and the difference of currently playing example and standby broadcasting example is only It is whether export display device, wherein, currently playing example is the broadcasting example exporting to display device, and standby broadcasting is real Example is not for exporting to the broadcasting example of display device.For one is play example, its attribute can be from standby broadcasting example It is set to currently playing example it is also possible to switch to standby broadcasting example from currently playing example.

Step 200, when receiving channel switch request, according to channel switch request, standby broadcasting example accordingly is set It is set to currently playing example.

In the embodiment of the present invention, after step 200, also include:

Step 300, the corresponding standby broadcasting example of currently playing example after setting switching.

In the embodiment of the present invention, multiple broadcasting examples can be run according to default many examples method of operation, thus Obtain during user's switching channels and preferably experience.In implementing, can be according to some default many examples method of operation To run multiple broadcasting examples it is also possible to be used in combination multiple many examples methods of operation, and according to default handover mechanism many Switch in the middle of individual many examples method of operation.

In user's frequent switching channel, the major way that generally adopts be by remote control<channel+>and<channel -> Two button request switchings, wherein,<channel+>button adds a handover request corresponding to channel, and<channel ->button corresponds to channel Subtract a handover request, that is, switched to the adjacent channel being currently actively watching channel by above-mentioned two button.Special for this Point, in the embodiment of the present invention, using current play channel adjacent channel as backup broadcasting example, thus user use <channel+>/<during the switching of channel ->two button, it is capable of fast channel switching, improves the experience of user.The present invention Embodiment exemplarily provides the example method of operation more than two kinds, is introduced separately below.

In step 100, described run two or more play examples as follows at least one enter OK:

Mode one: the channel n corresponding broadcasting example that the currently playing example of operation is being watched for user；That runs is standby With broadcasting example include first standby play example and ,/or the second standby broadcasting example；

Wherein, the described first standby example of playing is channel n+1 corresponding broadcasting example；Described second standby broadcasting example For channel n-1 corresponding broadcasting example；

Mode two: when receiving the first channel switch request, switching state is opened according to the first channel switch request, and In switching state, execution is described to run two or more steps playing example；

The channel n corresponding broadcasting example that the currently playing example running is being watched for user,

The standby broadcasting example running includes the 3rd standby broadcasting example；

Wherein,

When described first channel switch request adds a handover request for channel, the described 3rd standby example of playing is channel N+1 corresponding broadcasting example；

When described first channel switch request is channel down a handover request, the described 3rd standby example of playing is channel N-1 corresponding broadcasting example.

Wherein it is possible to setting time set, start time set when receiving the first channel switch request, and in timing dress Put timing in the interval of predetermined time, remain switching state, when receiving the first channel switch request every time, will reset Time set, when the time interval beyond time set, is transferred to normal playing status from switching state, in normal play shape In state, only run a broadcasting example.

Specifically, switching state includes " channel adds " state and " channel down " state.

In the embodiment of the present invention, when the method for operation be described mode for the moment, described according to channel switch request, will be corresponding Standby broadcasting example is set to currently playing example and includes:

When channel switch request adds a handover request for channel, a handover request is added according to described channel, standby by first It is set to currently playing example with broadcasting example；

When channel switch request is for channel down a handover request, according to described channel down a handover request, standby by second It is set to currently playing example with broadcasting example.

In the embodiment of the present invention, after the first standby broadcasting example is set to currently playing example, also include:

Corresponding for channel n1+1 broadcasting example is set to the first standby broadcasting example；Play corresponding for channel n1-1 in fact Example is set to the second standby broadcasting example；Wherein, n1 is the corresponding channel number of currently playing example after switching；

After the second standby broadcasting example is set to currently playing example, also include:

Corresponding for channel n2+1 broadcasting example is set to the first standby broadcasting example；Play corresponding for channel n2-1 in fact Example is set to the second standby broadcasting example；Wherein, n2 is the corresponding channel number of currently playing example after switching.

Wherein, n1=n+1, n2=n-1.

In the embodiment of the present invention, when n is for highest channel number, n+1 is minimum channel number, when n is minimum channel number, n- 1 is highest channel number that is to say, that channel number is set to circle queue.

With reference to a specific example, many examples method of operation that mode one is provided is introduced.

Refer to Fig. 3 a, be the schematic diagram of many examples method of operation, in television set, run 3 broadcasting examples, bag simultaneously Include currently playing example, the first standby broadcasting example and the second standby broadcasting example；Wherein currently playing example is that user is current The channel n being actively watching, the first standby broadcasting example and the second standby example of playing are respectively used to play the adjacent frequency of current channel Road n-1 and n+1, but this two standby pictures playing example do not export on display screen, the only picture of channel n output To on display screen.

Wherein, player 2 be used for playing currently playing example, player 1 and 3 be respectively used to play first standby play real Example and the second standby broadcasting example.

If receiving<channel+>corresponding channel to add a handover request, handoff procedure is as follows:

1-11, the picture of the player of channel n being currently played no longer export display screen, by the first standby broadcasting The picture of example (channel n+1 corresponding broadcasting example) exports display screen,.

1-12, by corresponding for channel n1+1 broadcasting example be set to the first standby broadcasting example；Will be corresponding for channel n1-1 Play example and be set to the second standby broadcasting example；Wherein, n1=n+1.

That is, corresponding for channel n+2 broadcasting example is set to the first standby broadcasting example, will be corresponding for channel n Play example and be set to the second standby broadcasting example.

In said process, player 1 and player 2 retain, simply player 1 be set to correspond to currently playing example, Player 2 and 3 is respectively set to corresponding to the first standby broadcasting example and the second standby broadcasting example.

If receive channel -> corresponding channel down a handover request, handoff procedure is as follows:

1-21, the picture of the player of channel n being currently played no longer export display screen, by the second standby broadcasting The picture of example (channel n-1 corresponding broadcasting example) exports display screen,.

1-22, by corresponding for channel n2+1 broadcasting example be set to the first standby broadcasting example；Will be corresponding for channel n1-1 Play example and be set to the second standby broadcasting example；Wherein, n2=n-1.

That is, corresponding for channel n broadcasting example is set to the first standby broadcasting example, will be corresponding for channel n-2 Play example and be set to the second standby broadcasting example.

In said process, player 2 and player 3 retain, simply player 3 be set to correspond to currently playing example, Player 1 and 2 is respectively set to corresponding to the first standby broadcasting example and the second standby broadcasting example.

In the embodiment of the present invention, channel switching method can be realized by channel switching mechanism, and channel switching mechanism can To be arranged in Intelligent television terminal, such as, in intelligent digitalized television terminal, channel switching mechanism can also be arranged on machine top In other video terminals of box etc.Set Top Box includes dvb Set Top Box, iptv Set Top Box, ott (over the top) machine top Box/television rod etc., video terminal can also be the intelligent terminal of mobile phone, panel computer etc.

In the embodiment of the present invention, when the method for operation is for described mode two,

Described according to channel switch request, standby broadcasting example accordingly is set to currently playing example and includes:

When receiving the second channel switch request in described switching state, according to the second channel switch request, will be corresponding Standby broadcasting example is set to currently playing example；Wherein,

When described second channel switch request for channel add a handover request and described 3rd standby play example be channel During n+1 corresponding broadcasting example, the described 3rd standby example of playing is set to currently playing example；

When described second channel switch request, for channel down a handover request and described 3rd standby example of playing is channel During n-1 corresponding broadcasting example, the described 3rd standby example of playing is set to currently playing example.

In the embodiment of the present invention, described by the described 3rd standby play after example is set to currently playing example, also Including:

When described second channel switch request adds a handover request for channel, corresponding for channel n3+1 broadcasting example is set It is set to the 3rd standby broadcasting example；Wherein, n3 is the corresponding channel number of currently playing example after switching；

When described second channel switch request is channel down a handover request, corresponding for channel n3-1 broadcasting example is set It is set to the 3rd standby broadcasting example；Wherein, n3 is the corresponding channel number of currently playing example after switching.

Refer to Fig. 3 b, for the schematic diagram of another kind of many examples method of operation.

In television set normal play situation, only run 1 broadcasting example in television set, be the channel that user is currently actively watching n5.

Wherein, player 1 is used for playing the channel n5 corresponding broadcasting example that user is currently actively watching.

When receiving channel and adding a handover request or channel down a handover request, two currently playing examples will be started, point Wei not currently playing example and the 3rd standby broadcasting example.

2-10, when receiving channel and adding a handover request, starts two currently playing examples, respectively currently playing reality Example and the 3rd standby broadcasting example, currently playing example is that (n5+1 currently just sees channel n5+1 corresponding broadcasting example for user The channel seen), the 3rd standby example of playing is channel n5+2 corresponding broadcasting example；

Wherein, player 1 is set to corresponding currently playing example, player 2 is set to corresponding 3rd standby broadcasting example.

" channel adds " state can be referred to as running two states running the example in above-mentioned 2-10, if had in timer In the effect time, receiving channel again and add a handover request, continuing to run under " channel adds " state, if had in timer In the effect time, the request receiving again is channel down a handover request, will switch to and run under " channel down " state.

2-20, when receiving channel down a handover request, starts two currently playing examples, respectively currently playing reality Example and the 3rd standby broadcasting example, currently playing example is that (n5-1 works as channel n5-1 corresponding broadcasting example for user after switching Before the channel that is actively watching), the 3rd standby example of playing is channel n5-2 corresponding broadcasting example；

" channel down " state can be referred to as running two states running the example in above-mentioned 2-20, if had in timer In the effect time, receiving channel down a handover request again, continuing to run under " channel down " state, if had in timer In the effect time, the request receiving again is that channel adds a handover request, will switch to and run under " channel adds " state.

Refer to Fig. 3 c and Fig. 3 d, be the schematic diagram of multiple running examples in many examples method of operation.

As shown in Figure 3 c, in the state of above-mentioned 2-10, if within timer effective time, receive channel again and add A handover request, will continue to run under " channel adds " state, and, customizer be reset, by the 3rd standby broadcasting before Example (channel n5+2 corresponding broadcasting example) is set to currently playing example, will the corresponding example of playing of channel n5+3 arrange For the 3rd standby broadcasting example；

If within timer effective time, the request receiving again is channel down a handover request, will switch to Run under " channel down " state, and, customizer is reset, corresponding for channel n5 broadcasting example is set to currently standby broadcasting Example, corresponding for channel n5-1 broadcasting example is set to the 3rd standby broadcasting example.In said process, due to the target of switching Channel not corresponding switching the front 3rd standby broadcasting example, therefore, does not exist and is set to work as by standby for the 3rd before broadcasting example The front process playing example, will not improve switch speed.

As shown in Figure 3 d, in the state of above-mentioned 2-20, if within timer effective time, receive channel down again A handover request, will continue to run under " channel down " state, and, customizer be reset, by the 3rd standby broadcasting before Example (channel n5-2 corresponding broadcasting example) is set to currently playing example, will the corresponding example of playing of channel n5-3 arrange For the 3rd standby broadcasting example；

If within timer effective time, the request receiving again is that channel adds a handover request, will switch to Run under " channel adds " state, and, customizer is reset, corresponding for channel n5 broadcasting example is set to currently standby broadcasting Example, corresponding for channel n5+1 broadcasting example is set to the 3rd standby broadcasting example.In said process, due to the target of switching Channel not corresponding switching the front 3rd standby broadcasting example, therefore, does not exist and is set to work as by standby for the 3rd before broadcasting example The front process playing example, will not improve switch speed.

In the embodiment of the present invention, when the described modes running two or more broadcasting examples include mode one and side During formula two；According to the abundant situation of resource situation, one kind of selection mode one or mode two runs two or more broadcasting Put example.The sufficient terminal applicable pattern one of resource, resource insufficient terminal applicable pattern two.For example, specifically, work as terminal When corresponding resource situation meets default resource requirement, employing mode one, otherwise, employing mode two.Wherein, resource requirement bag Include the internal memory of terminal, speed that network side is downloaded etc..

Channel switching method provided in an embodiment of the present invention, runs two or more broadcasting examples simultaneously, including Currently playing example and standby broadcasting example, currently playing example corresponds to the channel play, and standby broadcasting example and Currently playing example is the same, and corresponding picture is all downloaded to locally from network side, does not simply export screen display, when user please The channel asking switching corresponds to it is not necessary to ask corresponding video data according to channel number to network side during standby broadcasting example, Save the time interacting with network side it is not required that closing current player and opening new player, but directly will shield Curtain display switches to the locally existing standby picture playing example, and therefore, switch speed is very fast, improves user and uses body Test.In the embodiment of the present invention, network side refers to provide the CHINA RFTCOM Co Ltd of program data, locally refers to the local equipment of user, local Equipment includes home gateway and home network terminal, can be communicated by procotol between local multiple equipment, leads to Between often local multiple equipment, communication is to be carried out by the network of household internal.

And, because alternative example of playing is the same with currently playing example, it is similarly real-time and plays example, therefore, Screen is play after being switched to alternative broadcasting example, and the time point of the video that the video that screen is play is provided with network side is all the time Consistent, therefore picture can keep continuous, is not in jump.

Additionally, with respect in prior art, video source server first sends reference frame according to the video request of terminal and sends out For sending the mode of coded frame, in channel switching method provided in an embodiment of the present invention, alternative example of playing can directly switch To screen output, and keep getting final product it is not necessary to the server of network side works in normal encoding from network side reception video data Outside, corresponding reference frame and coded frame are sent according to the video request of terminal, therefore, there is no need to consider regarding of terminal and front end The matching problem of frequency source server, reduces the complexity of system, meanwhile, channel switching method provided in an embodiment of the present invention In, save the time interacting with network side during channel switch according to channel number it is not required that closing current player and opening New player, therefore improves the speed of channel switch, improves experience during user's switching channels.

In the embodiment of the present invention, prediction backup channel when, using n-1 and n+1 as backup channel as a example illustrate, this Outward, the backup channel of prediction can also include other channels, for example, when current channel is n, the backup channel number of prediction includes N-2, n-1 and n+1, n+2 are that is to say, that two can be adjusted to resource situation by the standby quantity playing example as needed Above it is therefore preferable to be more than two even number.

It is based on the same or analogous design with said method embodiment, the embodiment of the present invention also provides a kind of channel switch dress Put, referring to Fig. 4, described device includes:

Data capture unit 10, for obtaining current channel and the corresponding program data of predictive channel；Described current channel Program channel for output to display device；The number of current channel is one, and the number of predictive channel is one or more；

Switch unit 20, for when receiving channel switch request, according to channel switch request, by corresponding predictive channel It is set to current channel.

In the embodiment of the present invention, described channel switching mechanism also includes predicting unit 30, and described predicting unit is used for arranging The corresponding predictive channel of current channel after switching.

In the embodiment of the present invention, described predicting unit 30 is additionally operable to arrange the corresponding predictive channel of current channel；

Described predicting unit 30 includes at least one of following prediction module:

In the embodiment of the present invention, described switch unit is additionally operable to:

Described predicting unit 30 is additionally operable to: the setting corresponding predictive channel of current channel；

Described predicting unit also includes following prediction module:

In the embodiment of the present invention, described data capture unit 10 includes any one of following data acquisition module:

3rd data acquisition module, described 3rd data acquisition module includes:

4th data acquisition module, described 4th data acquisition module includes:

Based on same as the previously described embodiments or similar design, the embodiment of the present invention also provides a kind of video terminal, described Video terminal includes any one channel switching mechanism provided in an embodiment of the present invention.

It should be noted that embodiment described above is for only for ease of those skilled in the art understanding, and It is not used in and limit the scope of the invention, on the premise of the inventive concept without departing from the present invention, those skilled in the art couple The present invention made any obvious replacement and improve etc. all within protection scope of the present invention.

Claims

1. a kind of channel switching method is it is characterised in that methods described includes:

Obtain current channel and the corresponding program data of predictive channel；Played out according to the corresponding program data of current channel；

Described current channel is the program channel exporting to display device；The number of current channel is one, the number of predictive channel Mesh is one or more；

After receiving channel switch request, according to channel switch request, corresponding predictive channel is set to current channel, according to The corresponding program data of current channel after switching plays out.

2. channel switching method according to claim 1 is it is characterised in that described acquisition current channel and predictive channel pair Before the program data answered, described channel switching method also includes: the setting corresponding predictive channel of current channel；

Mode 1-1: during the channel n that current channel is being watched for user, corresponding for current channel predictive channel is set to wrap Include the first predictive channel and ,/or the second predictive channel；

Wherein, described first predictive channel is set to channel n+a1；Described second predictive channel is set to channel n-b1；Wherein, A1 is the integer sequence that minimum of a value is that 1 maximum is a1, and b1 is just whole for the integer sequence that minimum of a value is that 1 maximum is b1, a1 Number, b1 is positive integer；

Mode 1-2: during the channel n that current channel is being watched for user, corresponding for current channel predictive channel is set to wrap Include the 4th predictive channel；

Mode 1-3: during the channel n that current channel is being watched for user, the corresponding predictive channel of current channel be set to including 5th predictive channel；

Wherein, described 5th predictive channel is set to the user priority viewing channel drawing according to the statistical method of prediction；Described The statistical method of prediction includes: by channel setting users the longest for viewing time in predetermined timing statisticses or that viewing number of times is most Preferential viewing channel.

3. channel switching method according to claim 1 is it is characterised in that obtain current channel and predictive channel described Before corresponding program data, described channel switching method also includes:

Receive plus-minus channel switch request, when receiving plus-minus channel switch request, according to described plus-minus channel switch request Open switching state, and in switching state, the described step obtaining current channel and the corresponding program data of predictive channel of execution Suddenly；

Before described acquisition current channel and the corresponding program data of predictive channel, described channel switching method also includes: setting The corresponding predictive channel of current channel；

Mode 1-4: during the channel n that current channel is being watched for user, corresponding for current channel predictive channel is set to wrap Include the 3rd predictive channel；

When described plus-minus channel switch request adds a handover request for channel, described 3rd predictive channel is set to channel n+ c1；C1 is positive integer for the integer sequence that minimum of a value is that 1 maximum is c1, c1；

When described first channel switch request is channel down a handover request, described 3rd predictive channel is set to channel n- d1；D1 is positive integer for the integer sequence that minimum of a value is that 1 maximum is d1, d1.

4. channel switching method according to claim 1 it is characterised in that

Any one obtaining current channel and the corresponding program data of predictive channel and including in following manner described: program data packets Include at least one in frequency signal, demultiplexed signal and decoded signal；

According to the corresponding demultiplexed signal of each channel, obtain the corresponding decoded signal of each channel；Institute is cached by buffer area State the corresponding decoded signal of each channel；

According to each frequency corresponding frequency signal；Obtain the corresponding demultiplexed signal of current channel and corresponding each respectively The corresponding demultiplexed signal of individual predictive channel, and current channel is corresponding demultiplexes by the buffer area caching of setting in home gateway With signal and the corresponding demultiplexed signal of each predictive channel；

The corresponding demultiplexed signal of current channel and each pre- frequency measurement are cached by the buffer area of setting in home network terminal The corresponding demultiplexed signal in road；

According to the corresponding demultiplexed signal of each predictive channel, obtain that each predictive channel is corresponding to be exported to the solution of display device Code signal；

5. channel switching method according to claim 1 it is characterised in that

In described buffer area, the demultiplexed signal of caching includes channel corresponding pat, pmt bag, the program fluxion of predetermined frame number According to and padding empty bag；The program stream data of described predetermined frame number is the program stream data caching up-to-date acquisition；

Wherein, the empty bag of described pat, pmt bag, the program stream data of predetermined frame number and padding is suitable according to from top to bottom Sequence is stored in storehouse.

6. channel switching method according to claim 5 it is characterised in that

Described predetermined frame number is set greater than or is equal to decoder starting the required minimum frame number of decoding.

7. a kind of channel switching mechanism is it is characterised in that described device includes:

Data capture unit, for obtaining current channel and the corresponding program data of predictive channel；Described current channel is output Program channel to display device；The number of current channel is one, and the number of predictive channel is one or more；

Broadcast unit, for playing out according to the corresponding program data of current channel；And after receiving channel switch request, Played out according to the corresponding program data of current channel after switching；

Switch unit, for when receiving channel switch request, according to channel switch request, corresponding predictive channel being set to Current channel.

8. channel switching mechanism according to claim 7 is it is characterised in that described channel switching mechanism also includes prediction list Unit, described predicting unit is used for the corresponding predictive channel of current channel after setting switching.

9. channel switching mechanism according to claim 8 is it is characterised in that described predicting unit is additionally operable to arrange current frequency The corresponding predictive channel in road；

Described predicting unit includes at least one of following prediction module:

First prediction module, during the channel n watching for user for current channel, by corresponding for current channel predictive channel Be set to including the first predictive channel and ,/or the second predictive channel；

Wherein, described first predictive channel is set to channel n+a1；Described second predictive channel is set to channel n-b1；Wherein, A1 is the integer sequence that minimum of a value is that 1 maximum is a1, and b 1 is just whole for the integer sequence that minimum of a value is that 1 maximum is b1, a1 Number, b1 is positive integer；

Second prediction module, during the channel n watching for user for current channel, by corresponding for current channel predictive channel It is set to including the 4th predictive channel；

3rd prediction module, during the channel n watching for user for current channel, the corresponding predictive channel of current channel sets It is set to including the 5th predictive channel；

10. channel switching mechanism according to claim 7 is it is characterised in that described switch unit is additionally operable to:

Receive plus-minus channel switch request, when receiving plus-minus channel switch request, according to described plus-minus channel switch request Open switching state, and in switching state, the described acquisition corresponding section of at least two channels is executed by data capture unit The step of mesh number evidence；

Described predicting unit also includes following prediction module:

5th prediction module, during the channel n watching for user for current channel, by corresponding for current channel predictive channel It is set to including the 3rd predictive channel；

11. channel switching mechanisms according to claim 7 are it is characterised in that described data capture unit includes counting as follows According to any one of acquisition module:

First demultiplex module, for the signal according to the corresponding frequency of each frequency；Obtain each channel respectively corresponding Demultiplexed signal；

First decoding sub-module, for according to the corresponding demultiplexed signal of each channel, obtaining each channel corresponding decoding letter Number,

Second demultiplex module, for the signal according to the corresponding frequency of each frequency；Obtain current channel respectively corresponding Demultiplexed signal and the corresponding demultiplexed signal of each predictive channel corresponding, and current channel is cached by home gateway Corresponding demultiplexed signal and the corresponding demultiplexed signal of each predictive channel；

Second decoding sub-module, for according to the corresponding demultiplexed signal of current channel, obtaining current channel corresponding decoding letter Number,

3rd data acquisition module, described 3rd data acquisition module includes:

3rd demultiplex module, for the signal according to the corresponding frequency of each frequency；Obtain current channel respectively corresponding Demultiplexed signal and the corresponding demultiplexed signal of each predictive channel corresponding, and current channel is cached by home gateway Corresponding demultiplexed signal and the corresponding demultiplexed signal of each predictive channel；

The corresponding demultiplexed signal of current channel and the corresponding demultiplexing of each predictive channel are cached by home network terminal Signal；

3rd decoding sub-module, for according to the corresponding demultiplexed signal of current channel, obtain current channel corresponding export to The decoded signal of display device,

4th data acquisition module, described 4th data acquisition module includes:

4th demultiplex module, for the signal according to the corresponding frequency of each frequency；Obtain current channel respectively corresponding Demultiplexed signal and the corresponding demultiplexed signal of each predictive channel corresponding, and current channel is cached by home gateway Corresponding demultiplexed signal and the corresponding demultiplexed signal of each predictive channel；

4th decoding sub-module, corresponds to for according to the corresponding demultiplexed signal of each predictive channel, obtaining each predictive channel Output to display device decoded signal；

According to the corresponding demultiplexed signal of current channel, obtain that current channel is corresponding to be exported to the decoded signal of display device；

12. channel switching methods according to claim 11 it is characterised in that

In described buffer area, the demultiplexed signal of caching includes channel corresponding pat, pmt bag, the program fluxion of predetermined frame number According to and padding empty bag；The program stream data of described predetermined frame number is the up-to-date program stream data that caching obtains；

A kind of 13. video terminals are it is characterised in that described video terminal includes the frequency any one of claim 7～12 Road switching device.