CN101621573A - Method for playing video file in mobile phone - Google Patents
Method for playing video file in mobile phone Download PDFInfo
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- CN101621573A CN101621573A CN200910056199A CN200910056199A CN101621573A CN 101621573 A CN101621573 A CN 101621573A CN 200910056199 A CN200910056199 A CN 200910056199A CN 200910056199 A CN200910056199 A CN 200910056199A CN 101621573 A CN101621573 A CN 101621573A
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- video file
- decoding chip
- mobile phone
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Abstract
The invention discloses a method for playing a video file in a mobile phone, which comprises the following steps: setting a CCIR time sequence output by a digital signal processor (DSP) decoding chip; allotting a first buffer space in a storage card; reading a video file in the first buffer space of the storage card; analyzing the video file and dividing the video file into Audio and Video; respectively transmitting the Audio and the Video in an RAM in the DSP decoding chip; before Audio and Video data are transmitted to the DSP decoding chip, judging whether the buffer space in the DSP decoding chip is full or not; if the buffer space in the DSP decoding chip is full, not needing to transmit data to the DSP decoding chip and reading an extra video file in the buffer space of the storage card under such condition; and playing the video file. The invention can improve the quality of the video file played by a mobile phone and synchronize the played sound and a played image.
Description
Technical field
The present invention relates to a kind of method that is applied to the playing video file of mobile phone.
Background technology
Along with Development of Multimedia Technology, mobile phone terminal market has engendered the mobile phone that can play-over as video formats such as RMVB, AVI.The appearance of this type of mobile phone greatly facilitates the terminal use, can watch excellent film anywhere.
It is generally acknowledged that this type of mobile phone will satisfy following requirement: the hardwood rate of playing image to reach 25fps or more than, play sound shadow and picture smoothness, play sound and image synchronization.But seldom have mobile phone can really reach above-mentioned requirements on the existing market, most mobile phones can occur playing that the hardwood rate is low excessively, broadcast is not smooth, sound picture is asynchronous even some video file such as can not play at problem.These problems are to be subjected to scheme company hardware constraints a bit, some is to be subjected to DSP decoding chip capabilities limits, other is owing to the mobile phone respective elements inside is not carried out reasonable configuration, the function of having given play to the mobile phone respective elements inside that can not maximal efficiency.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method that is applied to the playing video file of mobile phone, in the time of can realizing playing on the video file mobile phone, the hardwood rate of playing image reach 25fps or more than, play sound shadow and picture smoothness, play sound and image synchronization.
For reaching above purpose, the invention provides a kind of method that is applied to the playing video file of mobile phone, may further comprise the steps:
The CCIR sequential of a, the output of setting DSP decoding chip, to adapt to the baseband chip platform, guarantee correct display image on display screen, wherein DSP decoding chip and baseband chip are realized basic communication function by SPI, realize image transmission function by the CCIR interface; Baseband chip and storage card are by the SPI communication;
B, in storage card, distribute a certain amount of space to read, analyze the video file use for the DSP decoding chip as first spatial cache;
C, read video file in first spatial cache of storage card;
D, analysis video file are divided into Audio and Video;
E, Audio and Video are sent into respectively in the DSP decoding chip internal RAM, before sending Audio and Video data toward the DSP decoding chip, whether the inner buffer space of judging the DSP decoding chip is full, if its inner buffer space is full, then do not need to send data to it again, in this case, can read extra video file in the spatial cache that stores card, for Study document use next time, operational efficiency can effectively be improved like this, the resource of avoiding waste;
F, playing video file, repeating step c, d, e before video playback finishes.
The present invention is applied to the method for the playing video file of mobile phone, it is by the reasonable disposition to the mobile phone respective elements inside, when having realized that video file is play, the hardwood rate of playing image reach 25fps or more than, play sound shadow and picture smoothness, play sound and image synchronization, the situation of having avoided influencing result of broadcast occurs.
Description of drawings
Fig. 1 is a flow chart of the present invention;
Fig. 2 is the CCIR sequential chart of MV6601G output.
Embodiment
The invention will be further elaborated below in conjunction with accompanying drawing.
As shown in Figure 1, the invention provides a kind of method that is applied to the playing video file of mobile phone, may further comprise the steps:
The CCIR sequential of a, the output of setting DSP decoding chip, to adapt to the baseband chip platform, guarantee correct display image on display screen, wherein DSP decoding chip and baseband chip are realized basic communication function by SPI, realize image transmission function by the CCIR interface; Baseband chip and storage card are by the SPI communication;
B, in storage card, distribute a certain amount of space to read, analyze the video file use for the DSP decoding chip as first spatial cache, wherein first spatial cache of storage card size is 256KB or 512KB, in order to make displaying video smooth more, 512KB is adopted in preferred embodiment of the present invention;
C, read video file in first spatial cache of storage card;
D, analysis video file are divided into Audio and Video;
E, Audio and Video are sent into respectively in the DSP decoding chip internal RAM, before sending Audio and Video data toward the DSP decoding chip, whether the inner buffer space of judging the DSP decoding chip is full, if its inner buffer space is full, just do not need to send data to it again, in this case, can read extra video file in the spatial cache that stores card, for Study document use next time, can effectively improve operational efficiency like this, the resource of avoiding waste, wherein there is the spatial cache of at least 2 32KB DSP decoding chip inside, be used for alternately receiving the Audio information that baseband chip sends, also have the spatial cache of at least 6 160KB, be used for repeating query to receive the Video information that baseband chip sends;
F, playing video file, repeating step c, d, e before video playback finishes.
Baseband chip links to each other with the DSP decoding chip by SPI_1, to baseband chip, the frequency of SPI_1 can be set at 13MHz, this frequency can normal play QVGA (240x320) resolution video file, if play the movie file that surpasses QVGA, the frequency of SPI_1 need be set at higher 24MHz.
Baseband chip links to each other with storage card by SPI_2.For baseband chip, SPI_2 and SPI_1 are ports independently, and both can concurrent working.The frequency of SPI_2 is the highest also can to reach 24MHz, can choose correspondent frequency according to the occasion that mobile phone is used.
The CCIR interface of DSP decoding chip: CCIR_CLK, CCIR_PCLK, CCIR_VS, CCIR_HS, CCIR_D00 ~ CCIR_D07 link to each other with the corresponding port of baseband chip respectively.
In mobile phone displaying video process, the DSP decoding chip is resolved the Audio and the Video of video file respectively, by relatively Audio and Video pointer position, finish both synchronously, thereby solve the stationary problem of sound and image in the video display process.If both are offset excessive, the mode that the DSP decoding chip can be taked to lose some hardwood is finished synchronously.
In storage card except read, first spatial cache of Study document, also need one second spatial cache to be used for storing Audio and Video information after the DSP decoding chip is resolved, wherein Audio needs 32KB, Video needs 160KB, second spatial cache is greater than 192KB, and preferred embodiment of the present invention is 200KBytes.But the first and second spatial cache samsaras are used, and after filling for the first time is full it are sent into the DSP decoding chip, just can be used for filling data message next time.
The preferred embodiment according to the present invention, the DSP decoding chip adopts the MV6601G of Mo Wei company; Baseband chip adopts the SC6600R of spreadtrum company.
Set the CCIR sequential that the DSP decoding chip is exported according to different platform configuration, it is effective to be set at rising edge such as CCIR_VS, and CCIR_HS is set at trailing edge to begin to fetch data.As shown in Figure 2, CCIR sequential chart with the MV6601G of Mo Wei company output is an example, Vsync represents the CCIR_VS signal, Polarity (d) expression rising edge is effective, the data area that Start lines (b) expression is invalid, Valid lines (c) expression active data zone, from this point, CCIR_HS begins action, One complete Frame (a) represents complete hardwood data, and for the output resolution ratio of 320x240, this value is 240, for the output resolution ratio of 640x480, this value is 480; Hsync represents the CCIR_HS signal, Polarity (h) expression trailing edge begins to grasp data, the data area that StartData (f) expression is invalid, real active data signal is grasped in Valid Data (g) expression from this point, One complete Line (e) represents complete line data, and for the output resolution ratio of 320x240, this value is 320, for the output resolution ratio of 640x480, this value is 640; Pixel clock represents CCIR_PCLK, and this value can be set at different frequencies such as 6MHz, 12MHz or 24MHz as required; Data[7:0] yuv data of expression output.
By the foregoing description, purpose of the present invention is by in full force and effect having reached.The personage who is familiar with this skill should be understood that the content that the present invention includes but be not limited to describe in the top embodiment.Any modification that does not depart from function of the present invention and structural principle all will be included in the scope of claims.
Claims (8)
1. method that is applied to the playing video file of mobile phone may further comprise the steps:
The CCIR sequential of a, the output of setting DSP decoding chip to adapt to the baseband chip platform, makes it correct display image on display screen, and wherein DSP decoding chip and baseband chip are realized communication function by SPI, realize image transmission function by the CCIR interface; Baseband chip and storage card are by the SPI communication;
B, in storage card, distribute a certain amount of space to read, analyze the video file use for the DSP decoding chip as first spatial cache;
C, read video file in first spatial cache of storage card;
D, analysis video file are divided into Audio and Video;
E, Audio and Video are sent into respectively in the DSP decoding chip internal RAM, wherein, before sending Audio and Video data toward the DSP decoding chip, whether the inner buffer space of judging the DSP decoding chip is full, if its inner buffer space is full, then do not need to send data to it again, in this case, can read extra video file in the spatial cache that stores card, for Study document use next time;
F, playing video file, repeating step c, d, e before video playback finishes.
2. the method that is applied to the playing video file of mobile phone as claimed in claim 1 is characterized in that, baseband chip links to each other with the DSP decoding chip by SPI_1, and baseband chip links to each other with storage card by SPI_2.
3. the method that is applied to the playing video file of mobile phone as claimed in claim 1 or 2, it is characterized in that the CCIR interface of DSP decoding chip: CCIR_CLK, CCIR_PCLK, CCIR_VS, CCIR_HS, CCIR_D00 ~ CCIR_D07 link to each other with the corresponding port of baseband chip respectively.
4. the method that is applied to the playing video file of mobile phone as claimed in claim 3 is characterized in that, the DSP decoding chip is resolved the Audio and the Video of video file respectively, by comparing Audio and Video pointer position, finishes both synchronous.
5. the method that is applied to the playing video file of mobile phone as claimed in claim 4 is characterized in that, first spatial cache of storage card is 512KB.
6. the method that is applied to the playing video file of mobile phone as claimed in claim 5, it is characterized in that, there is the spatial cache of 2 32KB DSP decoding chip inside, be used for alternately receiving the spatial cache of 6 160KB of Audio information that baseband chip sends, be used for repeating query to receive the Video information that baseband chip sends.
7. the method that is applied to the playing video file of mobile phone as claimed in claim 6, it is characterized in that, in storage card except reading, first spatial cache of Study document, also needing one second spatial cache to be used for storing Audio and Video information after the DSP decoding chip is resolved.
8. the method that is applied to the playing video file of mobile phone as claimed in claim 7 is characterized in that second spatial cache is at least 192KB.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910056199A CN101621573A (en) | 2009-08-10 | 2009-08-10 | Method for playing video file in mobile phone |
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| CN200910056199A CN101621573A (en) | 2009-08-10 | 2009-08-10 | Method for playing video file in mobile phone |
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| CN104486554A (en) * | 2015-01-09 | 2015-04-01 | 苏州科达科技股份有限公司 | Capturing control method, capturing control system and capturing device |
| CN105430478A (en) * | 2015-11-27 | 2016-03-23 | 青岛海信电器股份有限公司 | Network video buffer play method and device, and television |
| CN105868024A (en) * | 2016-03-29 | 2016-08-17 | 乐视控股（北京）有限公司 | Method and device for distributing space of externally-arranged card of mobile terminal for caching pictures |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104486554A (en) * | 2015-01-09 | 2015-04-01 | 苏州科达科技股份有限公司 | Capturing control method, capturing control system and capturing device |
| CN104486554B (en) * | 2015-01-09 | 2018-02-13 | 苏州科达科技股份有限公司 | Method for snap control, system and grasp shoot device |
| CN105430478A (en) * | 2015-11-27 | 2016-03-23 | 青岛海信电器股份有限公司 | Network video buffer play method and device, and television |
| CN105430478B (en) * | 2015-11-27 | 2019-05-07 | 青岛海信电器股份有限公司 | A kind of network video buffered play method, apparatus and television set |
| CN105868024A (en) * | 2016-03-29 | 2016-08-17 | 乐视控股（北京）有限公司 | Method and device for distributing space of externally-arranged card of mobile terminal for caching pictures |
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Application publication date: 20100106 |