CN100452859C - Method for quick image and sound synchronous adjustment - Google Patents
Method for quick image and sound synchronous adjustment Download PDFInfo
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- CN100452859C CN100452859C CNB2004100465414A CN200410046541A CN100452859C CN 100452859 C CN100452859 C CN 100452859C CN B2004100465414 A CNB2004100465414 A CN B2004100465414A CN 200410046541 A CN200410046541 A CN 200410046541A CN 100452859 C CN100452859 C CN 100452859C
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Abstract
The present invention relates to a method for quick image and sound synchronous adjustment. The method for quick image and sound synchronous adjustment comprises the following steps that whether an image and sound signal is synchronous or not is judged, whether a previous image and sound adjustment value of the image and sound signal has adjustment or not is detected, whether the previous image and sound adjustment value is greater than a first judgment value or not is compared, whether the previous image and sound adjustment value is greater than a second judgment value or not is compared, a first image and sound adjustment count value and a first image and sound adjustment value are increased, and the first image and sound adjustment value after adjustment is stored so as to serve as an image and sound adjustment value of the next time. Using the method for quick image and sound synchronous adjustment of the present invention can cause a digital laser video disk device to make played image and sound be synchronous when the digital video disk device reads a digital laser video disk under any circumstances.
Description
Technical field
The present invention relates to a kind of method of audio-visual synchronous adjustment fast, be meant a kind of digital laser video disk machine especially when reading Video CD, soon the method for the audio-visual synchronous adjustment of quick-recovery.
Background technology
Answer the epoch of following family digital to arrive, many big factories of domestic and international manufacturing are the many development costs of numerous and confused input on household appliances, in order that will can occupy a tiny space in the epoch of following family digital.In this so-called family digitalization, mostly be based on household appliances.With regard to audio-visual household appliances development, many research and development manufacturers research and develop VCD player (VCD Player) and present hot digital laser video disk machine (DVD Player) along with the raising of technology from traditional videocorder.
Present digital laser video disk machine, its function comprises the function of traditional videocorder and the function of VCD player, and added many new functions, such as interiorly have the Doby audio, can play multiple CD (as: DVD, VCD, CD, CD-R, SVCD and MP3), support multilingual (Multi-Language), CD picture browsing (as JPEG) and the audio-visual synchronous function of built-in adjusting.
When we use digital laser video disk machine to watch the videodisc sheet in the time of many, the situation that image and sound can't be synchronous takes place sometimes, when this situation produced, digital laser video disk machine promptly can activate the audio-visual synchronizing function of built-in adjusting, attempts image and sound are reached synchronous stage.
One system-computed device (SCR Counter) is arranged in digital laser video disk machine, the value that this system counter produced is up to add always, and should add up the normative reference of the value of generation as image and the common comparison of sound, in the videodisc pressing process, can contain a sound playing time value (APTS) in addition in the sound part, this value is in order to fixing time of sound playing, so audio-visually make comparisons synchronously for the value of this system counter and sound playing time value, be that image and sound are made comparisons, and make its audio-visual can be synchronous.
Whether synchronously please refer to Fig. 1 and be the audio-visual synchronous method flow diagram of tradition commonly used, at first judge audio-visual (S100), this audio-video system can enter with certain frequency this synchronous check process; System will judge the signal that receives and this signal is divided into two big classes substantially, be image greater than sound and sound greater than image, if when being judged as image greater than sound, namely enter and whether judge audio-visual adjusted value greater than judgment value (S102), wherein each manufacturer of this judgment value is different on software definition; If judged result for this audio-visual adjusted value less than judgment value, then finish check process (S110).
If judged result for this audio-visual adjusted value greater than judgment value, then system will enter and transfer slow image broadcasting speed (S104), make the broadcast of the broadcast cooperation sound of image, the method for its adjustment is the counting rate that advances of image for a change; Judge that then whether this audio-visual adjusted value is less than feasible value (S106), if the result who judges is no, then finish check process (S110), if the result who judges is yes, then will enter and establish back the normal broadcasting speed of image (S108), finish then check process (S110).
This is judged in this audio-visual whether synchronous step, if the result who judges is that sound is during greater than image, whether system will enter this audio-visual adjusted value of judgement greater than judgment value (S112), if the result who judges then finishes check process (S110) for this audio-visual adjusted value is less than judgment value; If the result who judges is during greater than judgment value for this audio-visual adjusted value, system will transfer the speed (S114) of fast image broadcast; And judging that whether this audio-visual adjusted value is less than feasible value (S116), if judge that this audio-visual adjusted value is greater than feasible value, then finish check process (S110), if judge that this audio-visual adjusted value is less than feasible value, then will enter and establish back the normal broadcasting speed of image (S108), finish then check process (S110).
Though and above-mentioned technology commonly used has the audio-visual synchronous function of adjustment, but this mechanism is to be purpose to finely tune audio-visual trickle gap, so judgment value that sets and eiconometer numerical value are all very little difference, when in case the CD-ROM drive servo system can't read the disc data smoothly (when forcing CD to shut down) as the excessive concussion of CD or external force, the sound count value that is documented on the discs can't be read into, but in this process, in the middle of the eiconometer numerical value of system still continues up to add up.So, namely can cause the count value of image in a flash much larger than the count value of sound.The synchronization mechanism of former common technology still can namely can be transferred slow image except count value with very little image as being general fine setting state under this state, so will cause a very long time audio-visual seriously asynchronous.Being reflected in the actual state, namely is that picture can be still in same figure, but still constantly broadcast of sound, until audio-visual finally synchronous.
Summary of the invention
Can't the audio-visual synchronous shortcoming of Quick-return for solving above-mentioned common technology, the present invention proposes a kind of fast method of audio-visual synchronous adjustment.
The present invention is a kind of fast method of audio-visual synchronous adjustment, judges whether a video-audio signal is synchronous; Whether a previous audio-visual adjusted value that detects this video-audio signal has adjustment; Relatively whether this previous audio-visual adjusted value is greater than one first judgment value; Relatively whether this previous audio-visual adjusted value is greater than one second judgment value; Increase by one first audio-visual adjustment count value and one first audio-visual adjusted value; This first audio-visual adjusted value after storage is adjusted is used as audio-visual adjusted value next time; And when this signal of video signal during less than this voice signal, then carry out an image and transfer fast machine-processed.
According to above-mentioned conception, wherein this video-audio signal comprises a signal of video signal and a voice signal.
According to above-mentioned conception, wherein should judge a video-audio signal whether in the synchronous step, if the result who judges is that the reproduction time value of this signal of video signal is during greater than the reproduction time value of voice signal, then carry out next step, if the result who judges be the reproduction time value of this signal of video signal during less than the reproduction time value of voice signal, also comprise and carry out an image and transfer fast machine-processed step.
According to above-mentioned conception, wherein should detect in the step of a previous audio-visual adjusted value of this video-audio signal, if the result who detects then carries out next procedure for not, otherwise, if the result who detects is for being then further to comprise:
According to this previous audio-visual adjusted value judge this audio-visual be fast the accent or accent slowly;
When judge this audio-visual be fast timing, then comprise the following steps:
Make comparisons with the very large audio-visual adjusted value that produces because of external force by first judgment value and to obtain one the 3rd judgment value;
Judge the fast amplitude of transferring of previous audio-visual adjusted value according to the 3rd judgment value;
The amplitude of transferring when previous audio-visual adjusted value is fast is hour then to comprise the following steps:
Increase by one first audio-visual adjustment count value and one first audio-visual adjusted value; And
Store adjusted this first audio-visual adjusted value and be used as next time audio-visual adjusted value;
When the amplitude of transferring when previous audio-visual adjusted value is fast is big, then comprise the following steps:
Increase by one second audio-visual adjustment count value and one second audio-visual adjusted value; And
Store adjusted this second audio-visual adjusted value and be used as next time audio-visual adjustment mark value.
According to above-mentioned conception, wherein in this previous audio-visual adjusted value step of this foundation, when the result who judges is slow timing, further comprise:
Relatively whether this first judgment value is greater than the 3rd judgment value;
When this first judgment value during less than the 3rd judgment value, relatively whether this second judgment value is greater than the 3rd judgment value;
When this first judgment value during less than the 3rd judgment value, setting one the 3rd audio-visual adjustment count value and setting audio-visual adjusted value is zero; And
When this first judgment value during, further comprise greater than the 3rd judgment value:
Increase by one second audio-visual adjustment count value and one second audio-visual adjusted value;
Store adjusted this second audio-visual adjusted value and be used as next time audio-visual adjustment mark value; And
Store the adjusted the 3rd audio-visual adjusted value conduct audio-visual adjusted value next time.
According to above-mentioned conception, wherein this first judgment value is a higher limit of this audio-visual adjusted value.
According to above-mentioned conception, wherein this second judgment value is a higher limit of this audio-visual adjusted value.
According to above-mentioned conception, wherein the 3rd judgment value is a lower limit of this audio-visual adjusted value.
According to above-mentioned conception, when the amplitude of wherein transferring when previous audio-visual adjusted value is fast is big, perhaps this relatively this first judgment value whether greater than the step of the 3rd judgment value in when comparative result when being, then comprise the following steps:
Increase by one second audio-visual adjustment count value and one second audio-visual adjusted value; And
Store adjusted this second audio-visual adjusted value and be used as next time audio-visual adjustment mark value.
When the method for the quick audio-visual synchronous adjustment of utilization the present invention can make digital laser video disk machine under any circumstance read the Video CD sheet, can both make played back audio-visual synchronous.
Description of drawings
Fig. 1 is the audio-visual synchronous method flow diagram of tradition commonly used;
Fig. 2 is the method flow diagram of the quick audio-visual synchronous adjustment of the present invention;
Fig. 3 is the method flow diagram of the previous audio-visual adjusted value of detection of the quick audio-visual synchronous adjustment of the present invention; And
Fig. 4 A and Fig. 4 B are the method flow diagram of the quick audio-visual synchronous adjustment of most preferred embodiment of the present invention.
Embodiment
In the general laser video disc pressing process, its image is to suppress with different tracks to form from sound, and when this laser video disc of digital laser video disk machine broadcast, makes it synchronous audio-visual in this laser video disc with this audio-visual synchronization mechanism.The embodiment of the following stated is mainly with when signal of video signal during greater than voice signal, the method of the audio-visual synchronous adjustment of being done, yet when voice signal took place greater than the signal of video signal situation, the method for its audio-visual synchronous adjustment was identical with method of the present invention, so do not repeat them here.
Please refer to Fig. 2 and be the method flow diagram of the quick audio-visual synchronous adjustment of the present invention, this audio-video system can use certain frequency to enter this sync check flow process, whether synchronously the method for this sync check at first judges a video-audio signal (S200), and this video-audio signal comprises a signal of video signal and a voice signal, wherein should judge a video-audio signal whether in the synchronous step, if the result who judges be this signal of video signal during less than voice signal, audio-video system carries out an image and transfers soon machine-processed step (S218); If the result who judges is that this signal of video signal is during greater than voice signal, detect a previous audio-visual adjusted value (S202) of this video-audio signal, wherein should detect in the previous audio-visual adjusted value step of this video-audio signal, if the numerical value of gained is that 1 this previous audio-visual adjusted value of representative is adjusted, if the numerical value of gained be zero this previous audio-visual adjusted value of representative be do not have adjusted, this previous audio-visual adjusted value has three kinds of different aspects, whether last position is to represent to transfer, second be before the representative be transfer fast or transfer slow, the 3rd representative be slowly accent or accent quickly.
When this previous audio-visual tone pitch of gained is zero or need not adjust the time, then relatively this previous audio-visual adjusted value whether greater than one first judgment value (S204), wherein this first judgment value is a higher limit of this audio-visual adjusted value, this first judgment value is 11, if comparative result is this previous audio-visual adjustment mark value during greater than this first judgment value, then further increase by one second audio-visual adjustment count value and one second audio-visual adjusted value (S214), and adjusted this second audio-visual adjusted value of storage is used as audio-visual adjustment mark value (S216) next time; This second audio-visual adjustment count value value that is hexadecimal 0x232 wherein, this second audio-visual adjusted value is the value of hexadecimal 0x0007, otherwise, if comparative result is this previous audio-visual adjustment mark value during less than this first judgment value, then compare this previous audio-visual adjusted value whether greater than the step of one second judgment value (S206), this second judgment value is a higher limit of this audio-visual adjusted value, and this second judgment value is 7.
Wherein at this previous audio-visual adjusted value whether in the step greater than one second judgment value, if the result who judges be less than the time, represent that this previous audio-visual adjusted value is the receptible feasible value of system, directly finish this and check flow process (S212), otherwise, if the result who judges be greater than the time, increase by one first audio-visual adjustment count value and one first audio-visual adjusted value (S208), this first audio-visual adjustment count value value that is hexadecimal 0x14a wherein, this first audio-visual adjusted value is the value of hexadecimal 0x0003; And adjusted this first audio-visual adjusted value of storage is used as audio-visual adjusted value (S210) next time, finish this then and check flow process (S212), wherein this first audio-visual adjusted value or this first audio-visual adjustment count value are by the value of system counter divided by a value gained, the speed that this action is advanced in order to the control picture, when the value of dividend is big, it is slow that its picture will be walked, and when the value of dividend hour, it is fast that its picture will be walked.
Please be with reference to figure 3, be the quick method flow diagram of the previous audio-visual adjusted value of detection of audio-visual synchronous adjustment of the present invention, this method comprise according to this previous audio-visual adjusted value judge this audio-visual be fast the accent or slow accent (S300), in this step, judge this previous audio-visual adjusted value by last the position forward several the 3rd whether be 1, if the result who judges is 0 representative accent slowly, comprise that further whether comparison one first judgment value is greater than the 3rd judgment value (S316), wherein this first judgment value is a higher limit of this audio-visual adjusted value, this first judgment value is that 11, the three judgment value are a lower limit of this audio-visual adjusted value; This relatively this first judgment value whether greater than the 3rd judgment value step in, when if result relatively is no, then compare one second judgment value whether greater than the step of the 3rd judgment value (S318), wherein this second judgment value is 7, this second judgment value is a higher limit of this audio-visual adjusted value, and in this this second judgment value whether in the step greater than the 3rd judgment value relatively, when if result relatively is no, then setting one the 3rd audio-visual adjustment count value and setting audio-visual adjusted value is zero (S320), and the 3rd audio-visual adjusted value conduct audio-visual adjusted value (S322) next time after the storage adjustment, the 3rd audio-visual adjustment count value value that is hexadecimal 0x12a wherein, the 3rd audio-visual adjustment count value is original audio-visual synchronous speed.
In this this second judgment value whether in the step greater than the 3rd judgment value relatively, if result relatively is when being, then further comprise increasing by one second audio-visual adjustment count value and one second audio-visual adjusted value (S312), and this second audio-visual adjusted value after the storage adjustment is used as audio-visual adjustment mark value (S314) next time; This second audio-visual adjustment count value value that is hexadecimal 0x232 wherein, this second audio-visual adjusted value is the value of hexadecimal 0x0007.
And in this first judgment value relatively whether in the step greater than the 3rd judgment value, if result relatively is when being, then further comprise and increase by one second audio-visual adjustment count value and one second audio-visual adjusted value (S312), and this second audio-visual adjusted value after the storage adjustment is used as audio-visual adjustment mark value (S314) next time, this second audio-visual adjustment count value value that is hexadecimal 0x232 wherein, this second audio-visual adjusted value is the value of hexadecimal 0x0007.
Wherein judge according to this previous audio-visual adjusted value this audio-visual be fast transfer or slowly in the step of accent, if the result who judges is fast timing, situation when this forces discs to shut down for the excessive concussion of discs or external force, then we can obtain a very large audio-visual adjusted value, and system will further make comparisons with the very large audio-visual adjusted value that produces because of external force by first judgment value and obtain one the 3rd judgment value (S302); Judge the fast amplitude (S304) of transferring of previous audio-visual adjusted value according to the 3rd judgment value, judge according to the 3rd judgment value in the step of the fast amplitude of transferring of previous audio-visual adjusted value at this, if judged result is hour, increase by one first audio-visual adjustment count value and one first audio-visual adjusted value (S306), and store adjusted this first audio-visual adjusted value and be used as next time audio-visual adjusted value (S308), finish to check flow process (S310) then; This first audio-visual adjustment count value value that is hexadecimal 0x14a wherein, this first audio-visual adjusted value is the value of hexadecimal 0x0003, otherwise, when if judged result is big, further comprise and increase by one second audio-visual adjustment count value and one second audio-visual adjusted value (S312), and adjusted this second audio-visual adjusted value of storage is used as audio-visual adjustment mark value (S314) next time, this second audio-visual adjustment count value value that is hexadecimal 0x232 wherein, this second audio-visual adjusted value is the value of hexadecimal 0x0007.
Please be the method flow diagram of the quick audio-visual synchronous adjustment of most preferred embodiment of the present invention with reference to figure 4A and Fig. 4 B, this audio-video system can use certain frequency to enter this sync check flow process, whether synchronously the method for this sync check at first judges a video-audio signal (S400), wherein this video-audio signal comprises a signal of video signal and a voice signal, judge that at this video-audio signal is whether in the synchronous step, if the result who judges is that this signal of video signal is during less than voice signal, carry out an image and transfer soon the step of mechanism (S440): if the result who judges is for this signal of video signal during greater than voice signal, whether a previous audio-visual adjusted value that detects this video-audio signal has adjustment (S402), if the numerical value of gained be 1 the representative this previous audio-visual adjusted value be have adjusted, if the numerical value of gained be 0 the representative this previous audio-visual adjusted value be do not have adjusted, this previous audio-visual adjusted value has three kinds of different aspects, whether last position is to represent to transfer, second is that representative is before that accent is fast or accent is slow, the representative of the 3rd position be slowly accent or accent quickly, detect in the step of a previous audio-visual adjusted value of this video-audio signal at this, if the result who detects is no, relatively whether this previous audio-visual adjusted value is greater than one first judgment value (S404).
If this relatively this previous audio-visual adjusted value whether greater than one first judgment value step in, when its result relatively is no, whether compare this previous audio-visual adjusted value greater than one second judgment value (S406); If this relatively this previous audio-visual adjusted value whether greater than one second judgment value step in, when its result relatively is no, then finish check process (S412), otherwise, if result relatively is when being, then further increase by one first audio-visual adjustment count value and one first audio-visual adjusted value (S408), and this first audio-visual adjusted value after the storage adjustment is used as audio-visual adjusted value (S410) next time; This first audio-visual adjustment count value value that is hexadecimal 0x14a wherein, this first audio-visual adjusted value is the value of hexadecimal 0x0003, wherein this first audio-visual adjusted value or this first audio-visual adjustment count value are by the value of system counter divided by a value gained, the speed that this action is advanced in order to control interface, when the value of dividend is big, it is slow that its picture will be walked, and when the value of dividend hour, it is fast that its picture will be walked.
This relatively this previous audio-visual adjusted value whether greater than one first judgment value step in, if result relatively is yes, then increase by one second audio-visual adjustment count value and the second audio-visual adjusted value (S414), and the second audio-visual adjusted value after store adjusting is as audio-visual adjusted value (S416) next time, this second audio-visual adjustment count value value that is hexadecimal 0x232 wherein, this second audio-visual adjusted value is the value of hexadecimal 0x0007.
Detect in the step of a previous audio-visual adjusted value of this video-audio signal at this, if the result who detects is yes, judge that previous audio-visual adjusted value is fast transfer or transfer slowly (S418), judge this previous audio-visual adjusted value by last the position forward several the 3rd whether be 1, if the result who judges is 0 representative accent slowly, comprise that further relatively whether this first judgment value is greater than the 3rd judgment value (S420), wherein this first judgment value is a higher limit of this audio-visual adjusted value, this first judgment value is 11, the 3rd judgment value is a lower limit of this audio-visual adjusted value, this is this first judgment value whether in the step greater than the 3rd judgment value relatively, when if comparative result is no, then relatively this second judgment value whether greater than the 3rd judgment value (S422), wherein this second judgment value is a higher limit of this audio-visual adjusted value, this second judgment value is 7, the 3rd judgment value is a lower limit of this audio-visual adjusted value, this this second judgment value whether in the step greater than the 3rd judgment value relatively wherein, when if comparative result is no, setting one the 3rd audio-visual adjustment count value and setting audio-visual adjusted value is zero (S424), and the 3rd audio-visual adjusted value conduct audio-visual adjusted value (S426) next time after the storage adjustment, the 3rd audio-visual adjustment count value value that is hexadecimal 0x12a wherein, the 3rd audio-visual adjustment count value is original audio-visual synchronous speed.
In this this second judgment value whether in the step greater than the 3rd judgment value relatively, if comparative result is when being, increase by one second audio-visual adjustment count value and one second audio-visual adjusted value (S428), and adjusted this second audio-visual adjusted value of storage is used as audio-visual adjustment mark value (S430) next time, this second audio-visual adjustment count value value that is hexadecimal 0x232 wherein, this second audio-visual adjusted value is the value of hexadecimal 0x0007.
In this this first judgment value whether in the step greater than the 3rd judgment value relatively, if comparative result is when being, increase by one second audio-visual adjustment count value and one second audio-visual adjusted value (S428), and adjusted this second audio-visual adjusted value of storage is used as audio-visual adjustment mark value (S430) next time, this second audio-visual adjustment count value value that is hexadecimal 0x232 wherein, this second audio-visual adjusted value is the value of hexadecimal 0x0007.
Wherein this previous audio-visual adjusted value of this foundation judge this audio-visual be in the fast step of transferring or transferring slowly, if the result who judges is fast timing, situation when this forces discs to shut down for the excessive concussion of discs or external force, then we can obtain a very large audio-visual adjusted value, system will make comparisons with the very large audio-visual adjusted value that produces because of external force by first judgment value and obtain one the 3rd judgment value (S432), wherein this first judgment value is a higher limit of this audio-visual adjusted value, this first judgment value is that 11, the three judgment value are a lower limit of this audio-visual adjusted value; Judge the fast amplitude (S434) of transferring of previous audio-visual adjusted value according to the 3rd judgment value, wherein should judge in the fast amplitude step of transferring of previous audio-visual adjusted value according to the 3rd judgment value, if judged result is hour to increase by one first audio-visual adjustment count value and one first audio-visual adjusted value (S436); And adjusted this first audio-visual adjusted value of storage is used as audio-visual adjusted value (S438) next time; This first audio-visual adjustment count value value that is hexadecimal 0x14a wherein, this first audio-visual adjusted value is the value of hexadecimal 0x0003.
Judge according to the 3rd judgment value in the fast amplitude step of transferring of previous audio-visual adjusted value at this, when if judged result is big, increase by one second audio-visual adjustment count value and one second audio-visual adjusted value (S428), and this second audio-visual adjusted value after the storage adjustment is used as audio-visual adjustment mark value (S430) next time; This second audio-visual adjustment count value value that is hexadecimal 0x232 wherein, this second audio-visual adjusted value is the value of hexadecimal 0x0007.
When the method for the quick audio-visual synchronous adjustment of utilization the present invention can make digital laser video disk machine under any circumstance read the Video CD sheet, can both make that played back audio-visual can be synchronous, the present invention not only has the function of common technology fine setting, still has the effect of avoiding in need excessive concussion that coarse adjustment causes, and can transfer nearly system counter value and sound counter value with very fast speed, can successfully solve above-mentioned audio-visual unusual nonsynchronous problem.
The above-mentioned accompanying drawing that discloses, explanation are only for embodiments of the invention, and those skilled in the art can do other all improvement according to above-mentioned explanation, and these change and still belong in the claim that invention spirit of the present invention and claim limit.
Claims (7)
1. the method for a quick audio-visual synchronous adjustment, this method comprises:
Judge whether a video-audio signal is synchronous, and wherein this video-audio signal comprises signal of video signal and voice signal;
When the reproduction time value of this signal of video signal during greater than the reproduction time value of this voice signal, then comprise the following steps:
Whether a previous audio-visual adjusted value that detects this video-audio signal has adjustment;
Relatively whether this previous audio-visual adjusted value is greater than one first judgment value;
When this previous audio-visual adjusted value during less than this first judgment value, then relatively this previous audio-visual adjusted value whether greater than one second judgment value;
When this previous audio-visual adjusted value during greater than this second judgment value, then increase by one first audio-visual adjustment count value and one first audio-visual adjusted value;
Store adjusted this first audio-visual adjusted value and be used as next time audio-visual adjusted value; And
When the reproduction time value of this signal of video signal, is then carried out an image and transferred fast mechanism during less than this second judgment value less than the reproduction time value of this voice signal or this previous audio-visual adjusted value.
2. the fast method of audio-visual synchronous adjustment as claimed in claim 1 is characterized in that in the step of the previous audio-visual adjusted value that this detects this video-audio signal, if the result who detects is no, then carry out next step, otherwise, if the result who detects is yes, then further comprise:
According to this previous audio-visual adjusted value judge this audio-visual be fast the accent or accent slowly;
When judge this audio-visual be fast timing, then comprise the following steps:
Make comparisons with the very large audio-visual adjusted value that produces because of external force by this first judgment value and to obtain one the 3rd judgment value;
Judge the fast amplitude of transferring of previous audio-visual adjusted value according to the 3rd judgment value;
The amplitude of transferring when previous audio-visual adjusted value is fast is hour then to comprise the following steps:
Increase by one first audio-visual adjustment count value and one first audio-visual adjusted value;
Store adjusted this first audio-visual adjusted value and be used as next time audio-visual adjusted value; And
When the amplitude of transferring when previous audio-visual adjusted value is fast is big, then comprise the following steps:
Increase by one second audio-visual adjustment count value and one second audio-visual adjusted value; And
Store adjusted this second audio-visual adjusted value and be used as next time audio-visual adjustment mark value.
3. the method for fast audio-visual synchronous adjustment as claimed in claim 2 is characterized in that in this previous audio-visual adjusted value step of this foundation, when judgement this audio-visual be slow timing, further comprise:
Relatively whether this first judgment value is greater than the 3rd judgment value;
When this first judgment value during less than the 3rd judgment value, relatively whether this second judgment value is greater than the 3rd judgment value;
When this second judgment value during less than the 3rd judgment value, setting one the 3rd audio-visual adjustment count value and setting audio-visual adjusted value is zero;
When this second judgment value during, further comprise greater than the 3rd judgment value:
Increase by one second audio-visual adjustment count value and one second audio-visual adjusted value;
Store adjusted this second audio-visual adjusted value and be used as next time audio-visual adjustment mark value; And
Store the adjusted the 3rd audio-visual adjusted value conduct audio-visual adjusted value next time.
4. the fast method of audio-visual synchronous adjustment as claimed in claim 3 is characterized in that this first judgment value is a higher limit of this audio-visual adjusted value.
5. the fast method of audio-visual synchronous adjustment as claimed in claim 3 is characterized in that this second judgment value is a higher limit of this audio-visual adjusted value.
6. the method for audio-visual synchronous adjustment fast as claimed in claim 5 is characterized in that the lower limit of the 3rd judgment value for this audio-visual adjusted value.
7. the method for fast audio-visual synchronous adjustment as claimed in claim 3, when it is characterized in that the amplitude of transferring soon when previous audio-visual adjusted value is big, perhaps this relatively this first judgment value whether greater than the step of the 3rd judgment value in when comparative result when being, then comprise the following steps:
Increase by one second audio-visual adjustment count value and one second audio-visual adjusted value; And
Store adjusted this second audio-visual adjusted value and be used as next time audio-visual adjustment mark value.
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| JP2003032638A (en) * | 2001-07-11 | 2003-01-31 | Matsushita Electric Ind Co Ltd | Synchronous reproduction method |
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| CN1705028A (en) | 2005-12-07 |
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