CN101262291A - A method and device for realizing speed-varying playing media - Google Patents
A method and device for realizing speed-varying playing media Download PDFInfo
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- CN101262291A CN101262291A CNA2008100938435A CN200810093843A CN101262291A CN 101262291 A CN101262291 A CN 101262291A CN A2008100938435 A CNA2008100938435 A CN A2008100938435A CN 200810093843 A CN200810093843 A CN 200810093843A CN 101262291 A CN101262291 A CN 101262291A
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Abstract
The invention discloses a method which can realize medium playing at variable speed. When a program is played quickly with N being selected as the speed-changing multiple, the received relative playing time value of each sound and video unit of the multiplexing subframe corresponding to the program is modified by a terminal into 1/N of the original value; when a program is played slowly with N being selected as the speed-changing multiple, the received relative playing time value of each sound and video unit of the multiplexing subframe corresponding to the program is modified by the terminal into N times of the original value; the sound and video data in all sound and video units are decoded and played at a speed of N times or 1/N by the terminal according to the starting time of playing and the modified relative time of playing of the multiplexing subframe; N is equal to or more than 1. The method of the invention can realize medium playing at a high speed or a low speed, thus providing more and more abundant services for users and bringing better experience to the users.
Description
Technical field
The present invention relates to filed of mobile multimedia broadcasting, relate in particular to a kind of method and device of speed-varying playing media.
Background technology
In recent years, digital radio China mobile multi-media broadcasting technology and standard evolution are rapid, Ou Zhou DVB-H (Digital Video Broadcast Handheld for example, the reception of digital video broadcast-handheld formula), MediaFLO (the Media Forward Link Only of the U.S., the single forward link of medium) and the CMMB (China Mobile Multimedia Broadcast, China Mobile multimedia broadcasting) etc. of China.
Mobile multimedia broadcast system can provide video and audio service for mobile phone users, simultaneously also can provide the several data broadcasting service, as video segment file based on the file downloading mode, MP3 (MPEG Audio Layer 3, Motion Picture Experts Group's audio layer 3) song is based on the business of real time data stream, as transport information, and various business based on IP (Internet Protocol, Internet protocol).
CMMB has advantages such as availability of frequency spectrum height, capacity is big, construction cost is relatively low as a kind of mobile multi-media service based on radio network, is used widely gradually at home.
Along with popularizing of the multimedia terminal of supporting the CMMB standard, the user has had higher requirement for the result of broadcast and the playing function of terminal.But the function of speed-varying playing media still can not be supported in existing C MMB multimedia terminal.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method and device of realizing speed-varying playing media, satisfies the demand of user for speed-varying playing media, the playing function of rich-media.
For solving the problems of the technologies described above, a kind of method that realizes speed-varying playing media of the present invention, when selecting N is speed change multiple when program is play fast, and each sound of the corresponding multiplexed sub frame of this program that terminal will receive, the relative reproduction time value of video unit are revised as the 1/N of initial value size; When selecting N is speed change multiple when program is carried out slow play, and the N that each sound of the corresponding multiplexed sub frame of this program that terminal will receive, the relative reproduction time value of video unit are revised as the initial value size doubly;
Terminal is according to the initial reproduction time and described amended relative reproduction time of multiplexed sub frame, to the sound in each sound, the video unit, video data carry out N doubly or the decoding of 1/N speed play;
Wherein, N 〉=1.
Further, when first multiplexed sub frame behind the non-selection speed-varying playing media of multiplexed sub frame, sound, video data are being carried out N doubly or before the decoding of 1/N speed plays, if select to play N fast doubly, the initial reproduction time of this multiplexed sub frame is revised as the 1/N of initial reproduction time difference of the initial reproduction time of this multiplexed sub frame and a last multiplexed sub frame and the initial reproduction time sum of a last multiplexed sub frame.
Further, if select slow play N doubly, the initial reproduction time that the initial reproduction time of this multiplexed sub frame is revised as this multiplexed sub frame and the initial reproduction time difference of a last multiplexed sub frame the N times initial reproduction time sum with a last multiplexed sub frame.
Further, multiplexed sub frame parses its initial reproduction time, and preserves after being received from the subframe head.
Further, when sound, video data were decoded broadcast, if select slow play N doubly, the buffer memory that then will play the storehouse increased to N times of former buffer memory at least, with data cached.
Further, a kind of device of realizing speed-varying playing media comprises: receiving element, parameter set unit and decoding broadcast unit, wherein,
Receiving element is used for the multiplexed sub frame of program receiving, notice according to parameter set unit, each sound of program multiplexing subframe, the relative reproduction time of video unit are made amendment, when parameter set unit notice is play N times fast, each sound of the corresponding multiplexed sub frame of this program that receives, the relative reproduction time value of video unit are revised as the 1/N of initial value size; When parameter set unit notice was carried out slow play N times, the N that the relative reproduction time value of each sound of the corresponding multiplexed sub frame of this program that receives, video unit is revised as the initial value size doubly; And send to the decoding broadcast unit;
Parameter set unit is used to receive carrying out that the user selects and plays N fast doubly or slow play N instruction doubly, and the notice receiving element play fast N doubly or slow play N doubly;
The decoding broadcast unit is used for initial reproduction time and relative reproduction time according to multiplexed sub frame, each sound, the sound in the video unit, the video data of the multiplexed sub frame that receives is carried out the decoding broadcast of N times or 1/N speed.
Further, receiving element also is used for when first multiplexed sub frame that the multiplexed sub frame that receives is non-after receiving the instruction of parameter set unit, if parameter set unit notice is play N doubly fast, the initial reproduction time of this multiplexed sub frame is changed to the 1/N of initial reproduction time difference of the initial reproduction time of this multiplexed sub frame and a last multiplexed sub frame and the initial reproduction time sum of a last multiplexed sub frame.
Further, receiving element also is used for when first multiplexed sub frame that the multiplexed sub frame that receives is non-after receiving the instruction of parameter set unit, if parameter set unit notice is carried out slow play N doubly, the initial reproduction time that the initial reproduction time of this multiplexed sub frame is changed to this multiplexed sub frame and the initial reproduction time difference of a last multiplexed sub frame the N times initial reproduction time sum with a last multiplexed sub frame.
Further, after receiving element also is used to receive multiplexed sub frame, from the subframe head, parses its initial reproduction time, and preserve.
Further, the decoding broadcast unit is when decoding broadcast to sound, video data, if be slow play N times, the buffer memory that then will play the storehouse increases to N times of former buffer memory at least, with data cached.
In sum, the present invention is by the relative reproduction time in the data cell parameter in the initial reproduction time in the subframe head of revising multiplexed sub frame and sound, the video paragraph header, shorten or increase the broadcast interval between each picture, reach quick or playing medium with low speed, for the user provides more, abundanter service, give the user with better experience.
Description of drawings
Fig. 1 is the flow chart of the inventive method;
Fig. 2 is the structural representation of the subframe head of multiplexed sub frame;
Fig. 3 is the structural representation of the video-frequency band of multiplexed sub frame;
Fig. 4 is the structural representation of the audio section of multiplexed sub frame;
Fig. 5 is the structural representation of apparatus of the present invention.
Embodiment
When user's playing media is also selected to put soon or put slowly, method of the present invention is according to the multiple of putting or putting slowly soon, the relative reproduction time of the sound of the multiplexed sub frame that receives, video unit is dwindled or amplify corresponding multiple, reach the purpose that medium are put soon or put slowly at interval by the broadcast of shortening or increase adjacent tone, video unit.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described:
Figure 1 shows that the method for speed-varying playing media of the present invention, comprise the steps:
101: variable P is set, is used to deposit the initial reproduction time of the multiplexed sub frame that receives, the initial value of P can be set at zero;
102: terminal receives the multiplexed sub frame that comprises sound, video-frequency band from broadcast channel, the broadcast of decoding, when the user selects speed change to play, multiplexed sub frame is resolved, from the subframe head, parse initial reproduction time (as shown in Figure 2), adopt C for convenient statement and represent the initial reproduction time that parses;
103: P is changed to C, even P equals C;
104: terminal parses each sound of multiplexed sub frame, the relative reproduction time of video unit from the sound of the sound of multiplexed sub frame, video-frequency band, video paragraph header, as shown in Figure 3 and Figure 4;
105: when the user selects to play fast, terminal is carried out dwindling of corresponding multiple according to the quick broadcast multiple of user's selection and the relative reproduction time of each sound that parses, video unit with each sound of multiplexed sub frame, the relative reproduction time of video unit; When the user selects slow play, then relative reproduction time is carried out the amplification of corresponding multiple;
If the user selects to play fast N doubly, then the relative reproduction time in sound, the video paragraph header is revised as 1/N times of initial value; If the user selects to put slowly N doubly, then the relative reproduction time in sound, the video paragraph header is revised as N times of initial value.
106: play the storehouse according to the relative reproduction time in the initial reproduction time in the subframe head and sound, the video paragraph header, to sound, video data carry out N doubly or the decoding of 1/N speed play;
When sound, video data being decoded broadcast, the relative reproduction time of the actual play time of each sound, video unit (time point)=initial reproduction time+amended each sound, video unit; When playing fast, because relative reproduction time is set to 1/N times of initial value, so the broadcast of adjacent two sounds, video unit has just been shortened N doubly at interval, that is to say, the playing duration of sound, video unit has shortened N doubly, that is, this sound, video unit have been play N doubly fast; During slow play, corresponding therewith, repeat no more.
From playing the angle in storehouse, play the storehouse and comprise two parts, control module and decoder module; Control module is used to resolve the play parameter of multiplexed sub frame and sound, video data, and put into a formation, calculate the actual play time of each sound, video unit according to the initial reproduction time and the relative reproduction time of each sound, video unit, when system time arrives the actual play time of a certain sound, video unit, the data of corresponding sound, video unit are taken out from formation, send to decoder module; Decoder module is used for sound, video data are decoded, and outputs to screen display.So, after having changed relative reproduction time, doubly (put N slowly doubly) such as it having been increased N, the data that control module will be delayed time each sound, video unit send to decoder module, that is, increased the playing duration of each sound, video unit, the picture that the user sees is exactly to put slowly.
Because broadcast singal is to send in real time, can not delay time, therefore, when carrying out N times of slow play, the buffer memory of playing the storehouse must be increased at least original N doubly with data cached, could guarantee that picture is continuous, not frame losing.
107: after finishing the broadcast of a multiplexed sub frame, continue to receive next frame, receive next multiplexed sub frame after, from the subframe head, parse its initial reproduction time M;
108: variable V is set, V is changed to M, even V equals M;
109:, the initial reproduction time M in the subframe head of multiplexed sub frame is revised as P+ (M-P) * (1/N) if play N fast doubly; If slow play N doubly, then is revised as initial reproduction time M P+ (M-P) * N;
The initial reproduction time of revising each multiplexed sub frame be for the initial reproduction time that guarantees each multiplexed sub frame continuous, for example, two continuous multiplexed sub frames, A and B, under the normal condition, the relative reproduction time of the initial reproduction time of the initial reproduction time=A subframe of B subframe+its all sounds or video unit, if each sound to the A subframe, the relative reproduction time of video unit is revised, at this moment, if the initial reproduction time of B subframe is not made amendment, will cause the initial reproduction time of A subframe and B subframe discontinuous, promptly the relative reproduction time of the initial reproduction time of A subframe+its audio/video unit just can't equate with the initial reproduction time of B.
For example, the initial reproduction time of A subframe is 1000, it has 25 video units, interval 40 between the actual play time of each video unit, then under the normal condition, the initial reproduction time of B subframe is 1000+25*40=2000, that is to say that the initial reproduction time that carries in the subframe head of B subframe is 2000; Putting soon under 2 times the situation, the broadcast of each video unit of A subframe is made into 20 at interval, the playing duration sum that is the video unit of A subframe has reduced half, the initial reproduction time of B subframe should be: 1000+25*20=1500, for guaranteeing the continuous of A subframe and the initial reproduction time of B subframe, the initial reproduction time of B subframe also should reduce the reduction of the video unit playing duration of A subframe, so should change the initial reproduction time of B subframe into 1000+ (2000-1000) * (1/2)=1500.
110: P is changed to V,, jumps to step 104 even P equals V.
Figure 5 shows that the structural representation of apparatus of the present invention, comprising: comprising: receiving element, parameter set unit and decoding broadcast unit, wherein,
Receiving element is used for the multiplexed sub frame of program receiving, notice according to parameter set unit, each sound of program multiplexing subframe, the relative reproduction time of video unit are made amendment, when parameter set unit notice is carried out N when doubly playing fast, each sound of the corresponding multiplexed sub frame of this program that receives, the relative reproduction time value of video unit are revised as the 1/N of initial value size; When parameter set unit notice was carried out N times of slow play, the N that the relative reproduction time value of each sound of the corresponding multiplexed sub frame of this program that receives, video unit is revised as the initial value size doubly; Receiving element also is used for when first multiplexed sub frame that the multiplexed sub frame that receives is non-after receiving the instruction of parameter set unit, if parameter set unit notice is play N doubly fast, the initial reproduction time of this multiplexed sub frame is revised as the 1/N of initial reproduction time difference of the initial reproduction time of this multiplexed sub frame and a last multiplexed sub frame and the initial reproduction time sum of a last multiplexed sub frame; If parameter set unit notice is carried out slow play N doubly, the initial reproduction time that the initial reproduction time of this multiplexed sub frame is revised as this multiplexed sub frame and the initial reproduction time difference of a last multiplexed sub frame the N times initial reproduction time sum with a last multiplexed sub frame; And amended multiplexed sub frame sent to the decoding broadcast unit; After receiving element also is used to receive multiplexed sub frame, from the subframe head, parses its initial reproduction time, and preserve;
Parameter set unit is used to receive the instruction of carrying out N times of quick broadcast or N times of slow play that the user selects, and the notice receiving element carries out the doubly quick broadcast of N or N times of slow play;
The decoding broadcast unit is used for initial reproduction time and relative reproduction time according to multiplexed sub frame, each sound, the sound in the video unit, the video data of the multiplexed sub frame that receives is carried out the decoding broadcast of N times or 1/N speed.The decoding broadcast unit is when decoding broadcast to sound, video data, if be slow play N times, the buffer memory that then will play the storehouse increases to N times of former buffer memory at least, with data cached.
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; being familiar with those of ordinary skill in the art ought 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 method that realizes speed-varying playing media is characterized in that,
When selecting N is speed change multiple when program is play fast, and each sound of the corresponding multiplexed sub frame of this program that terminal will receive, the relative reproduction time value of video unit are revised as the 1/N of initial value size; When selecting N is speed change multiple when program is carried out slow play, and the N that each sound of the corresponding multiplexed sub frame of this program that terminal will receive, the relative reproduction time value of video unit are revised as the initial value size doubly;
Terminal is according to the initial reproduction time and described amended relative reproduction time of multiplexed sub frame, to the sound in each sound, the video unit, video data carry out N doubly or the decoding of 1/N speed play;
Wherein, N 〉=1.
2, the method for claim 1, it is characterized in that, when first multiplexed sub frame behind the non-selection speed-varying playing media of described multiplexed sub frame, sound, video data are being carried out N doubly or before the decoding of 1/N speed plays, if select to play N fast doubly, the initial reproduction time of this multiplexed sub frame is revised as the 1/N of initial reproduction time difference of the initial reproduction time of this multiplexed sub frame and a last multiplexed sub frame and the initial reproduction time sum of a last multiplexed sub frame.
3, method as claimed in claim 2, it is characterized in that, if select slow play N doubly, the initial reproduction time that the initial reproduction time of this multiplexed sub frame is revised as this multiplexed sub frame and the initial reproduction time difference of a last multiplexed sub frame the N times initial reproduction time sum with a last multiplexed sub frame.
4, method as claimed in claim 3 is characterized in that, described multiplexed sub frame parses its initial reproduction time, and preserves after being received from the subframe head.
5, the method for claim 1 is characterized in that, when sound, video data were decoded broadcast, if select slow play N doubly, the buffer memory that then will play the storehouse increased to N times of former buffer memory at least, with data cached.
6, a kind of device of realizing speed-varying playing media is characterized in that, comprising: receiving element, parameter set unit and decoding broadcast unit, wherein,
Receiving element is used for the multiplexed sub frame of program receiving, notice according to parameter set unit, each sound of program multiplexing subframe, the relative reproduction time of video unit are made amendment, when parameter set unit notice is play N times fast, each sound of the corresponding multiplexed sub frame of this program that receives, the relative reproduction time value of video unit are revised as the 1/N of initial value size; When parameter set unit notice was carried out slow play N times, the N that the relative reproduction time value of each sound of the corresponding multiplexed sub frame of this program that receives, video unit is revised as the initial value size doubly; And send to the decoding broadcast unit;
Parameter set unit is used to receive carrying out that the user selects and plays N fast doubly or slow play N instruction doubly, and the notice receiving element play fast N doubly or slow play N doubly;
The decoding broadcast unit is used for initial reproduction time and relative reproduction time according to multiplexed sub frame, each sound, the sound in the video unit, the video data of the multiplexed sub frame that receives is carried out the decoding broadcast of N times or 1/N speed.
7, device as claimed in claim 6, it is characterized in that, described receiving element also is used for when first multiplexed sub frame that the multiplexed sub frame that receives is non-after receiving the instruction of parameter set unit, if parameter set unit notice is play N doubly fast, the initial reproduction time of this multiplexed sub frame is changed to the 1/N of initial reproduction time difference of the initial reproduction time of this multiplexed sub frame and a last multiplexed sub frame and the initial reproduction time sum of a last multiplexed sub frame.
8, device as claimed in claim 6, it is characterized in that, described receiving element also is used for when first multiplexed sub frame that the multiplexed sub frame that receives is non-after receiving the instruction of parameter set unit, if parameter set unit notice is carried out slow play N doubly, the initial reproduction time that the initial reproduction time of this multiplexed sub frame is changed to this multiplexed sub frame and the initial reproduction time difference of a last multiplexed sub frame the N times initial reproduction time sum with a last multiplexed sub frame.
9, device as claimed in claim 8 is characterized in that, after described receiving element also is used to receive multiplexed sub frame, parses its initial reproduction time from the subframe head, and preserves.
10, device as claimed in claim 9 is characterized in that, described decoding broadcast unit is when decoding broadcast to sound, video data, if be slow play N times, the buffer memory that then will play the storehouse increases to N times of former buffer memory at least, with data cached.
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Cited By (7)
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| CN101635847B (en) * | 2009-09-02 | 2011-11-30 | 中兴通讯股份有限公司 | Transmission method, video display device and terminal of streaming media |
| CN102447868A (en) * | 2010-10-11 | 2012-05-09 | 扬智电子（上海）有限公司 | Video stream fast playing method |
| CN102541560A (en) * | 2011-12-29 | 2012-07-04 | 奇智软件（北京）有限公司 | Implementation method for speed change software and device |
| CN102547390A (en) * | 2011-12-26 | 2012-07-04 | 深圳创维数字技术股份有限公司 | Media stream playing method and media stream playing system |
| CN104410930A (en) * | 2014-11-07 | 2015-03-11 | 青岛海信宽带多媒体技术有限公司 | A method and device for controlling playing speed of transport stream TS media file |
| CN104636138A (en) * | 2011-12-29 | 2015-05-20 | 北京奇虎科技有限公司 | Speed change software implementation method and device |
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| CN1396742A (en) * | 2002-08-02 | 2003-02-12 | 清华大学 | Speed-variable playing method based on stream medium technique for player |
| CN100525447C (en) * | 2005-12-07 | 2009-08-05 | 联合信源数字音视频技术（北京）有限公司 | Audio-video frequency media data organization realizing method of supporting precision positioning |
| CN101025987A (en) * | 2006-02-21 | 2007-08-29 | 广州市纽帝亚资讯科技有限公司 | Video play fast forward/fast rewind method and device based on video content |
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| CN101635847B (en) * | 2009-09-02 | 2011-11-30 | 中兴通讯股份有限公司 | Transmission method, video display device and terminal of streaming media |
| CN102447868A (en) * | 2010-10-11 | 2012-05-09 | 扬智电子（上海）有限公司 | Video stream fast playing method |
| CN102447868B (en) * | 2010-10-11 | 2013-11-06 | 扬智电子科技(上海)有限公司 | Video stream fast playing method |
| CN102547390A (en) * | 2011-12-26 | 2012-07-04 | 深圳创维数字技术股份有限公司 | Media stream playing method and media stream playing system |
| CN102541560A (en) * | 2011-12-29 | 2012-07-04 | 奇智软件（北京）有限公司 | Implementation method for speed change software and device |
| CN102541560B (en) * | 2011-12-29 | 2015-02-11 | 奇智软件（北京）有限公司 | Implementation method for speed change software and device |
| CN104636138A (en) * | 2011-12-29 | 2015-05-20 | 北京奇虎科技有限公司 | Speed change software implementation method and device |
| CN104636138B (en) * | 2011-12-29 | 2018-05-04 | 北京奇虎科技有限公司 | Implementation method for speed change software and device |
| CN104410930A (en) * | 2014-11-07 | 2015-03-11 | 青岛海信宽带多媒体技术有限公司 | A method and device for controlling playing speed of transport stream TS media file |
| CN107731243A (en) * | 2016-08-12 | 2018-02-23 | 电信科学技术研究院 | A kind of real-time variable playback method and apparatus of voice |
| CN107731243B (en) * | 2016-08-12 | 2020-08-07 | 电信科学技术研究院 | Voice real-time variable-speed playing method and device |
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