CN101267545A - A program switching method and device - Google Patents
A program switching method and device Download PDFInfo
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- CN101267545A CN101267545A CNA2008100938401A CN200810093840A CN101267545A CN 101267545 A CN101267545 A CN 101267545A CN A2008100938401 A CNA2008100938401 A CN A2008100938401A CN 200810093840 A CN200810093840 A CN 200810093840A CN 101267545 A CN101267545 A CN 101267545A
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Abstract
The invention discloses a method and a device for program switch, the switch method comprises the following steps: a user terminal buffers video key frames of one or more user preference program in a buffer zone previously; when the user switches to the previously buffered program, the user terminal obtains the video key frames of the program from the buffer zone at first, and then sends to decoder for fast reconstructing a picture, thereafter, continues to receive the multiplex frames of the program, resolves out video and audio data, and sends to the decoder for decoding and playing. According to the invention, a video I frame of a user preference program is previously buffered, such that the video I frame can be quickly found out when the user switches to the program, an image can be reconstructed, and the waiting time is reduced.
Description
Technical field
The present invention relates to field of mobile phone or other digital TV field, specifically, relate to a kind of changing method and device of program.
Background technology
Mobile Multimedia Broadcasting is a kind of multimedia broadcasting technology of promoting recently, handheld terminal can receive broadcast singal under mobile status, can watch TV programme through terminal processes, the program receiving TV Guide, can demonstrate the rendition list in terminal, allow the user can watch program selectively.In addition, this technology is also supported the broadcasting of other multi-medium datas, realizes watching real-time stock information and other information on portable terminal.
At Mobile Multimedia Broadcasting CMMB (China Mobile Multimedia Broadcasting, China Mobile multimedia broadcasting) in, every road TV programme all takies a broadcast channel, and on physical layer, the broadcast channel correspondence planning in advance good frequency and some time slots.Audio, video data is to be placed in the audio frequency and video unit of multiplexed sub frame to carry, and each video unit all has " picture frame type " field to indicate the type of this frame of video, comprising: I frame (key frame), P frame and B frame (reference frame).Each video flowing of multiplexed sub frame contains a plurality of picture frames.When playing, requiring first picture frame must be not rely on the frame that other frames just can independently be decoded and show, as video I frame.
When the user when a program switches to another program, the common treating method of portable terminal is: switch to the broadcast channel of new program, player must wait and receive a video I frame then, could make up the complete picture of a frame like this.Because the time interval of video I frame is longer, so the first frame picture that may cause making up new program need be waited for the long time.The user can feel that switch speed is very slow, and it is level and smooth inadequately to change platform.
Long wait when avoiding changing platform, allow the user that good use experience is arranged, common way is when the program picture does not also occur at present, on player interface, show a static images, perhaps play one section short and small local video file and occupy time of the blank content of this section, make the interface relatively more friendly.
But these above-mentioned solutions fundamentally do not reduce user's stand-by period.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of changing method and device of program, solves the problem of waiting for that when changing platform video I frame time is long.
In order to address the above problem, the invention provides a kind of changing method of program, comprise the steps:
User terminal cushions the key frame of video of one or more user preference programs in advance in buffering area;
When the user selects to switch to the program of described buffering in advance, described user terminal obtains earlier the key frame of video of this program from described buffering area, it is sent into decoder make up picture fast, continue to receive the multiplexed frame of this program then, parse audio, video data, be sent to the decoder broadcast of decoding.
Further, the user is provided with the preference grade for the program in the rendition list, and the service identification and the preference grade of user preference program be recorded in the chained list, when cushioning in advance, from described chained list, select the highest grade of preference one or more programs to cushion.
Further, after described user selected one to play from the program of described buffering in advance, the program that the highest grade of preference that described user terminal selecting cushions was buffered to its key frame of video in the described buffering area.
Further, described user terminal is when the key frame of video of the described program of buffering in advance of buffering, whether the value of " picture frame type " is 0 to judge whether to be key frame of video in the video unit according to Mobile Multimedia Broadcasting, if then it is buffered in the described buffering area.
Further, described user terminal is buffered to the described up-to-date key frame of video of the program of buffering in advance in the described buffering area when the key frame of video of the described program of buffering in advance of buffering, and the key frame of video that has cushioned before covering.
The present invention also provides a kind of switching device shifter of program, comprises the switch control unit that is arranged on the user terminal, pre-buffer cell and receiving element, wherein:
Described pre-buffer cell is used for cushioning in advance the key frame of video of one or more user preference programs;
Described switch control unit, be used to receive user's switching command, when the user selects to switch to the program of described buffering in advance, from described pre-buffer cell, obtain earlier the key frame of video of this program, it is sent into decoder make up picture fast, send again and receive indication to described receiving element; When the user switches to the program that does not cushion in advance, directly send and receive indication to described receiving element;
Described receiving element is used for receiving the multiplexed frame of this program according to described reception indication according to the mode of normal play, parses audio, video data, is sent to the decoder broadcast of decoding.
Further, described switching device shifter comprises that also the user preference program is provided with the unit, wherein:
Described user preference program is provided with the unit, is used to the program in the rendition list that corresponding preference grade is set, and the service identification and the preference grade of described program is kept in the preference program chained list;
Described switch control unit, being used to call described user preference program is provided with the unit and inquires about described preference program chained list, and send cushion key frame in advance indication to receiving element, comprise the service identification of the highest grade of preference one or more programs in the described indication that cushions key frame in advance;
Described receiving element is used for the indication that cushions key frame in advance according to described, receive described service identification correspondence program key frame of video and be buffered in the described pre-buffer cell.
Further, after described user selects one to play from the program of described buffering in advance, described switch control unit calls described user preference program and the unit is set inquires about described preference program chained list, send cushion key frame in advance indication to described receiving element, comprise the service identification of the highest grade of preference that cushions a program in the described indication that cushions key frame in advance.
Further, whether the value of " picture frame type " is 0 to judge whether to be key frame of video in the video unit of described receiving element according to Mobile Multimedia Broadcasting, if then it is buffered in the described pre-buffer cell.
Further, described pre-buffer cell is when the key frame of video of the described program of buffering in advance of buffering, if receive the up-to-date key frame of video of this program, then cushion the described up-to-date key frame of video of the program of buffering in advance, and the key frame of video of this program that has cushioned before covering.
The present invention passes through the video I frame of interruptible customer preference program in advance, makes and can find video I frame, reconstructed image rapidly when switching to this program.Because stored the up-to-date video I frame of preference program in advance, and do not needed to handle audio section and data segment in the multiplexed sub frame, so newly-increased processing expenditure is not very big, memory consumption neither be very big.
Description of drawings
Fig. 1 is the flow chart that the user is provided with certain program preferences grade;
Fig. 2 is the structured flowchart of the switching device shifter of the embodiment of the invention;
Fig. 3 does not have the program process chart of buffered video I frame in advance for user in the embodiment of the invention selects to play one;
Fig. 4 selects to play a program process chart that cushions video I frame in advance for user in the embodiment of the invention.
Embodiment
Core concept of the present invention is: because the user switches to the probability of program of user preference when changing platform very high, so take to cushion in advance the video I frame of one or more user preference programs, so that when switching to the user preference program, player can navigate to video I frame rapidly, construct a complete program picture, realized taking over seamlessly the function of platform.
Be that example is described technical scheme of the present invention below with CMMB, but changing method of the present invention and device are not limited to the Mobile Multimedia Broadcasting net.
The changing method that the embodiment of the invention is applied to the CMMB system adopts following technical scheme:
(1) for each program in the rendition list is provided with a preference grade, in order to indicate the preference degree of user to this program;
(2) when user's opening player selects certain program to play, receive the multiplexed frame of current playing program on the foreground, parse audio, video data, be sent to the broadcast of decoding of decoder in the player; Simultaneously, from the program of user preference, select the highest grade of preference two programs, open their broadcast channel respectively, receive multiplexed frame, cushioned video I frame in advance on the backstage;
In this step, according to " picture frame type " in the CMMB video-frequency band (video unit) indication, promptly whether the value of " picture frame type " is 0 to judge whether the frame into video I, if be 0, illustrates that then this frame is the I frame, is buffered to it in buffering area.
(3) when the user switches to one of this two-way preference program, just can use the good video I frame design of graphics picture of buffering in advance;
(4) when the user withdraws from player, close the broadcast channel of the program of current broadcast and the preference program that open on the backstage, and discharge corresponding buffer resource.
Wherein, in the step (1), the user can be by the preference grade of the rendition list layout setting program, and the preference grade of program for example can be divided into 0～5 grade, and the default level of each program is 0, represents no preference; In addition, can also on terminal, store a user preference program chained list, in order to the service identification of preservation program, and the preference grade, have only the preference grade just to join this chained list greater than 0 program, and can be according to the record in this chained list of preference grade descending.
As shown in Figure 1, the handling process that the program preferences grade is set in the embodiment of the invention comprises: provide an editing interface for user's inputting preferences grade in terminal, be recorded in then in the preference program chained list.Before adding record, whether judge the preference grade greater than 0 earlier, if greater than 0, then the service numbers of this program and preference level data are inserted into the relevant position of preference program chained list as a chained list node, and chained list can be according to the descending of preference grade; If the preference grade equals 0, then do not add this program to preference program chained list.
In step (2), if the time run into a new video I frame, then cover the video I frame of previous buffering in buffering, for every road program of buffered video I frame in advance, guaranteeing has and has only its up-to-date video I frame in the buffering area.
In addition, in other embodiment of the present invention, after being provided with of program preferences grade that step (2) also can be in finishing the rendition list, just cushion the video I frame of the highest grade of preference two-way program in advance, switch in order to the user, thereby the preference program that just can select to have cushioned video I frame when user's opening player is play, and need not to wait for.
As shown in Figure 2, the switching device shifter of the embodiment of the invention comprises that mainly the user preference program that is arranged on the user terminal is provided with unit, switch control unit, pre-buffer cell and receiving element, wherein:
Described user preference program is provided with the unit, is used to the program in the rendition list that corresponding preference grade is set, and the service identification and the preference grade thereof of described program is recorded in the preference program chained list, for the switch control unit inquiry.
Described receiving element, be used for after the reception indication that receives program from switch control unit, open the broadcast channel of this program, receive its multiplexed frame, and make two kinds of different disposal: (1) then according to the indication that cushions key frame in advance of switch control unit, parses video data if require to handle according to the mode that cushions the I frame in advance for this program from multiplexed frame, and select out the I frame, be sent to pre-buffer unit buffers again; (2) if requiring to put row into according to the mode of normal play for this program handles, then from multiplexed frame, parse after the video data, no longer select out the I frame, but continue to parse voice data, and audio, video data directly is sent to decoder decode plays.
Described pre-buffer cell is used to each road to require to cushion in advance the program of I frame, preserves the video I frame of sending here from receiving element, and if have new I frame to arrive, the I frame of preserving before then covering.
Described switch control unit is used to receive user's switching command, and when the user selected to switch to the program of described buffering in advance, whether the described pre-buffer cell of inquiry had cushioned the I frame of this program earlier.According to the I frame whether this program is arranged, carry out two kinds of different processing: (1) is if buffering has the I frame in advance, then from described pre-buffer cell, obtain earlier the video I frame of this program, it is sent into the decoder broadcast of decoding, and then send the reception comprise this program service identification and indicate to receiving element, the indication receiving element continues the multiplexed frame of program receiving according to the mode of normal play and handles.At this moment, because the I frame of this program in described pre-buffer cell has been sent to decoder, and this program has become current playing program, so can also cushion one road program more in advance in the pre-buffer cell, switch control unit is inquired about described user preference program once more the unit is set at this moment, obtain the high program of preference grade the 3rd, the indication that cushions key frame in advance that sends the service identification that comprises this program is to receiving element then, and receiving element is handled according to the mode that cushions the I frame in advance for this program according to the indication that this cushions key frame in advance; (2) if inquire the I frame that does not cushion program in the pre-buffer cell in advance, then directly send and receive indication to receiving element, the indication receiving element receives this program according to the mode of normal play, and is sent to decoder decode and plays.
Below in conjunction with accompanying drawing and some application examples the present invention is described in further detail.
Should be appreciated that above generality is described and the following detailed description is all enumerated and illustrative, purpose is for to the claimed further instruction that the invention provides.
Use example one
As shown in Figure 3, when the user selected to play a program that does not have a buffered video I frame in advance, its switch step was as follows:
In this case, the foreground owing to the video I frame that does not cushion in advance, so still need to receive first video I frame, could make up picture when handling.
Whether step 305 receives multiplexed frame, be 0 to judge whether frame, buffered video I frame in advance into video I according to the value of the picture frame type in the CMMB video-data fragment.
Processing section on the backstage, i.e. the video I frame of user's preference program has been realized having cushioned in advance in step 303～305, prepares for the user switches to these two preference programs.
This is used in the example, the backstage selects two the highest grade of preference programs to cushion from the program of user preference, yet, under other situations, also can only select one or two above the highest grade of preference programs to cushion, decide on the professional number that TV chip can receive simultaneously.
Use example two
As shown in Figure 4, when the user selects to play a program that cushions video I frame in advance, also be divided into the foreground and handle and background process, its switch step is as follows:
Step 401, the user selects to play a program that cushions the I frame in advance;
Step 402 in handle on the foreground, is obtained earlier the video I frame of this program from buffering area, be sent to decoder, makes up picture fast, carries out next step;
Step 403, continuation receives the multiplexed frame of current playing program, parses audio, video data, is sent to decoder and plays, unless the user switches to other programs, the foreground is handled and is continued to carry out in this manner.
Step 404 is carried out background process in step 402, obtain the service numbers of the 3rd preference program (the highest grade of preference the program that promptly cushions) from preference program chained list, carries out next step;
Step 405 is opened its broadcast channel, carries out next step;
Step 406 receives the multiplexed frame of this program, according to " picture frame type " indication buffered video I frame.
This is used in the example, the backstage can select two the highest grade of preference programs to cushion from the program of user preference, because the program that has two-way to cushion in advance originally on the backstage, wherein one the tunnel has cut to the foreground and plays, so the backstage need increase by one tunnel preference program, cushions in advance.
Certainly; the present invention also can have other embodiment; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1, a kind of changing method of program is characterized in that, comprises the steps:
User terminal cushions the key frame of video of one or more user preference programs in advance in buffering area;
When the user selects to switch to the program of described buffering in advance, described user terminal obtains earlier the key frame of video of this program from described buffering area, it is sent into decoder make up picture fast, continue to receive the multiplexed frame of this program then, parse audio, video data, be sent to the decoder broadcast of decoding.
2, changing method as claimed in claim 1 is characterized in that,
The user is provided with the preference grade for the program in the rendition list, and the service identification and the preference grade of user preference program is recorded in the chained list, selects the highest grade of preference one or more programs to cushion when cushioning in advance from described chained list.
3, changing method as claimed in claim 2 is characterized in that,
After described user selected one to play from the program of described buffering in advance, the program that the highest grade of preference that described user terminal selecting cushions was buffered to its key frame of video in the described buffering area.
4, as claim 1, each described changing method of 2 or 3, it is characterized in that,
Described user terminal is when the key frame of video of the described program of buffering in advance of buffering, whether the value of " picture frame type " is 0 to judge whether to be key frame of video in the video unit according to Mobile Multimedia Broadcasting, if then it is buffered in the described buffering area.
5, changing method as claimed in claim 4 is characterized in that,
Described user terminal is buffered to the described up-to-date key frame of video of the program of buffering in advance in the described buffering area when the key frame of video of the described program of buffering in advance of buffering, and the key frame of video that has cushioned before covering.
6, a kind of switching device shifter of program is characterized in that, comprises the switch control unit that is arranged on the user terminal, pre-buffer cell and receiving element, wherein:
Described pre-buffer cell is used for cushioning in advance the key frame of video of one or more user preference programs;
Described switch control unit, be used to receive user's switching command, when the user selects to switch to the program of described buffering in advance, from described pre-buffer cell, obtain earlier the key frame of video of this program, it is sent into decoder make up picture fast, send again and receive indication to described receiving element; When the user switches to the program that does not cushion in advance, directly send and receive indication to described receiving element;
Described receiving element is used for receiving the multiplexed frame of this program according to described reception indication according to the mode of normal play, parses audio, video data, is sent to the decoder broadcast of decoding.
7, switching device shifter as claimed in claim 6 is characterized in that, described switching device shifter comprises that also the user preference program is provided with the unit, wherein:
Described user preference program is provided with the unit, is used to the program in the rendition list that corresponding preference grade is set, and the service identification and the preference grade of described program is kept in the preference program chained list;
Described switch control unit, being used to call described user preference program is provided with the unit and inquires about described preference program chained list, and send cushion key frame in advance indication to receiving element, comprise the service identification of the highest grade of preference one or more programs in the described indication that cushions key frame in advance;
Described receiving element is used for the indication that cushions key frame in advance according to described, receive described service identification correspondence program key frame of video and be buffered in the described pre-buffer cell.
8, switching device shifter as claimed in claim 7 is characterized in that,
After described user selects one to play from the program of described buffering in advance, described switch control unit calls described user preference program and the unit is set inquires about described preference program chained list, send cushion key frame in advance indication to described receiving element, comprise the service identification of the highest grade of preference that cushions a program in the described indication that cushions key frame in advance.
9, as claim 6, each described switching device shifter of 7 or 8, it is characterized in that,
Whether the value of " picture frame type " is 0 to judge whether to be key frame of video in the video unit of described receiving element according to Mobile Multimedia Broadcasting, if then it is buffered in the described pre-buffer cell.
10, switching device shifter as claimed in claim 9 is characterized in that,
Described pre-buffer cell is when the key frame of video of the described program of buffering in advance of buffering, if receive the up-to-date key frame of video of this program, then cushion the described up-to-date key frame of video of the program of buffering in advance, and the key frame of video of this program that has cushioned before covering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100938401A CN101267545A (en) | 2008-04-30 | 2008-04-30 | A program switching method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100938401A CN101267545A (en) | 2008-04-30 | 2008-04-30 | A program switching method and device |
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| CN101267545A true CN101267545A (en) | 2008-09-17 |
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| CNA2008100938401A Pending CN101267545A (en) | 2008-04-30 | 2008-04-30 | A program switching method and device |
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| CN101695119A (en) * | 2009-10-17 | 2010-04-14 | 中兴通讯股份有限公司 | Network side and player of mobile multimedia broadcasting as well as skin updating method of player |
| CN101533655B (en) * | 2008-12-19 | 2011-06-15 | 徐清华 | Playing method for a plurality of TS video files based on high definition media player |
| CN102231848A (en) * | 2011-06-22 | 2011-11-02 | 中兴通讯股份有限公司 | IPTV channel switching method and apparatus thereof |
| CN102843580A (en) * | 2012-09-03 | 2012-12-26 | 国网电力科学研究院 | Method for displaying image of video monitoring system by inserting I frame forcibly |
| CN102938849A (en) * | 2011-08-15 | 2013-02-20 | 上海帕科软件科技有限公司 | Method for fast switching internet protocol television (IPTV) channels |
| CN103200445A (en) * | 2012-01-06 | 2013-07-10 | 先科研有限公司 | Network television program playing and intelligent buffer management method and system and network television |
| CN103686414A (en) * | 2013-12-19 | 2014-03-26 | 北京奇艺世纪科技有限公司 | Network video playing method and device |
| WO2014183674A1 (en) * | 2013-12-06 | 2014-11-20 | 中兴通讯股份有限公司 | Media play method and device, and set top box |
| CN104347098A (en) * | 2013-08-08 | 2015-02-11 | 腾讯科技（深圳）有限公司 | Method and device for carrying out data processing |
| CN106254929A (en) * | 2016-09-12 | 2016-12-21 | 天脉聚源(北京)传媒科技有限公司 | A kind of processing method and processing device of video data |
| CN106412505A (en) * | 2016-09-29 | 2017-02-15 | 浙江大华技术股份有限公司 | Video display method and apparatus in P2P mode |
| WO2017077377A3 (en) * | 2015-11-03 | 2017-07-13 | 中兴通讯股份有限公司 | Station switching method and device, set-top box, and storage medium |
| CN113542657A (en) * | 2020-04-15 | 2021-10-22 | 成都鼎桥通信技术有限公司 | Method and device for recovering image after screen blacking |
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| CN101533655B (en) * | 2008-12-19 | 2011-06-15 | 徐清华 | Playing method for a plurality of TS video files based on high definition media player |
| CN101695119A (en) * | 2009-10-17 | 2010-04-14 | 中兴通讯股份有限公司 | Network side and player of mobile multimedia broadcasting as well as skin updating method of player |
| CN102231848A (en) * | 2011-06-22 | 2011-11-02 | 中兴通讯股份有限公司 | IPTV channel switching method and apparatus thereof |
| CN102938849A (en) * | 2011-08-15 | 2013-02-20 | 上海帕科软件科技有限公司 | Method for fast switching internet protocol television (IPTV) channels |
| CN103200445B (en) * | 2012-01-06 | 2017-05-24 | 先科研有限公司 | Network television program playing and intelligent buffer management method and system and network television |
| CN103200445A (en) * | 2012-01-06 | 2013-07-10 | 先科研有限公司 | Network television program playing and intelligent buffer management method and system and network television |
| CN102843580A (en) * | 2012-09-03 | 2012-12-26 | 国网电力科学研究院 | Method for displaying image of video monitoring system by inserting I frame forcibly |
| CN104347098B (en) * | 2013-08-08 | 2018-09-07 | 腾讯科技（深圳）有限公司 | A kind of method and device of data processing |
| CN104347098A (en) * | 2013-08-08 | 2015-02-11 | 腾讯科技（深圳）有限公司 | Method and device for carrying out data processing |
| WO2014183674A1 (en) * | 2013-12-06 | 2014-11-20 | 中兴通讯股份有限公司 | Media play method and device, and set top box |
| CN104702994A (en) * | 2013-12-06 | 2015-06-10 | 中兴通讯股份有限公司 | Media play method, media play device and set top box |
| CN103686414B (en) * | 2013-12-19 | 2018-08-07 | 北京奇艺世纪科技有限公司 | Internet video playback method and device |
| CN103686414A (en) * | 2013-12-19 | 2014-03-26 | 北京奇艺世纪科技有限公司 | Network video playing method and device |
| WO2017077377A3 (en) * | 2015-11-03 | 2017-07-13 | 中兴通讯股份有限公司 | Station switching method and device, set-top box, and storage medium |
| CN106254929A (en) * | 2016-09-12 | 2016-12-21 | 天脉聚源(北京)传媒科技有限公司 | A kind of processing method and processing device of video data |
| CN106412505A (en) * | 2016-09-29 | 2017-02-15 | 浙江大华技术股份有限公司 | Video display method and apparatus in P2P mode |
| CN113542657A (en) * | 2020-04-15 | 2021-10-22 | 成都鼎桥通信技术有限公司 | Method and device for recovering image after screen blacking |
| CN113542657B (en) * | 2020-04-15 | 2023-07-28 | 成都鼎桥通信技术有限公司 | Method and device for recovering black screen |
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