CN1207922C - Method and system for measuring accuracy of video/audio output synchronization, and analysis means - Google Patents
Method and system for measuring accuracy of video/audio output synchronization, and analysis means Download PDFInfo
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Abstract
The present invention relates to technique of measuring the accuracy of video and audio signal output synchronization of a video and audio encoding system, namely that after reference video and audio data with special design is inputted into the video and audio encoding system, the video and audio output of the video and audio encoding system is decoded by a readable medium analyzing tool recorded on a data processing device so as to obtain measured video and audio data. Then, the nonsynchronous time points of the measured vide and audio data are detected by an analysis program in the analyzing tool according to the known reference video and audio data, and besides, the synchronization error value between the video and audio data is calculated.
Description
Invention field
The invention relates to a kind of vision signal output of audio-visual coded system and method and system of the synchronous accuracy between audio signal output measured, particularly be recorded in analysis tool in the medium of an embodied on computer readable, with the technology of synchronous error value and time point between the vision signal output of analyzing audio-visual coded system and audio signal output about utilization.
Background of invention
Until today, there has been the compress technique of various vision signals and audio signal to be developed gradually, and has been applied in many television broadcasting stations, make that in a special time audio-visual number of pictures is maximization.(Moving Picture Experts Group MPEG) has issued several standards about the numerical data transmission systems to motion picture expert group.First kind of known standard also is called 72, the second kinds of known standards of ISO/IEC standard 111 for for MPEG-2 for being MPEG-1, also is called ISO/IEC standard 13818.These known standards are to formulate the standard of compressed video signal and audio signal of being used for.
The function of mpeg encoded system promptly is the mpeg system stream (system stream) that dynamic video signal data and audio signal data is converted to standard.So-called mpeg system stream, promptly be with video signal data and audio signal data record audio-visual broadcast medium [as videocorder, digital video signal CD (digital video disk, DVD), cable or wireless transmission] on a succession of 0 and 1 signal.
When playing the audio-visual frequency signal of MPEG, if institute's mpeg system stream that produces has nonsynchronous phenomenon between vision signal and audio signal, for the beholder of an acumen, even only there is 0.1 second error amount also might to be discovered by quilt.So, concerning the mpeg encoded system, whether be a considerable job synchronously between checking vision signal and the audio signal.Yet observing the error amount between vision signal and the audio signal in artificial mode is not objective and inaccurate method, and is that part is the tediously long again operation of labor intensive.
Summary of the invention
Therefore, a purpose of the present invention is to provide a kind of method of measuring synchronous accuracy between audio-visual coded system vision signal output and audio signal output.
Another object of the present invention is to provide the measuring system of synchronous accuracy between a kind of audio-visual coded system vision signal output that realizes with software and audio signal output.
A further object of the present invention is to provide a kind of computer program, be recorded on the medium of an embodied on computer readable, it is in order to accepting the system flow that an audio-visual coded system is produced, with the vision signal output of analyzing audio-visual coded system and synchronous error time of origin point and the error amount between audio signal output.
Conception according to a first aspect of the present invention, the method of synchronous error value between a kind of vision signal output of measuring audio-visual coded system and audio signal output, be by reference video signal data that comprise a specific image model of one very first time of tool length and a reference audio signal data of tool one second time span are imported an audio-visual coded system, and produce the video signal data and an audio signal data of encoding of a coding.Behind the audio signal data of the video signal data of handling coding and coding, with producing test video signal data that comprises this specific image model that tool should very first time length and test audio signal data of this second time span of tool, should very first time length be a multiple of this second time span wherein.Next with an analysis tool detect with these reference video signal data in synchronous this reference audio signal data of this specific image model in the very first time point at an audio signal information place, and with these synchronous test audio signal data of this specific image model in this test video signal data in one second time point at an audio signal information place, and calculate a difference value between this very first time point and this second time point.
In preferred embodiment of the present invention, above-mentioned specific image model can be filled up the vision signal picture in these reference video signal data, also can only occupy the some of the vision signal picture in these reference video signal data.On the other hand, the present invention also can put the synchronous error value that detects between vision signal output and audio signal output by the detection time of fixing a particular audio signal model, and its method is to produce the reference video signal data of one very first time of tool length and a reference audio signal data that comprises a particular audio signal model of tool one second time span.Next these reference video signal data and this reference audio signal data are imported this audio-visual coded system, and produce the video signal data of a coding and the audio signal data of a coding.Audio signal data at the video signal data of handling this coding respectively and this coding, after test audio signal data that comprise this particular audio signal model that produce a test video signal data that tool should very first time length and this second time span of tool, very first time point with the video signal information place in these synchronous reference video signal data of this particular audio signal model in analysis tool detection and this reference audio signal data, and with this synchronous test video signal data of this particular audio signal model in these test audio signal data in one second time point at a video signal information place, and calculate a difference value between this very first time point and this second time point.
Conception according to a second aspect of the present invention, a kind of vision signal output of measurement one audio-visual coded system and the system of a synchronous error amount of an audio signal output, it comprises a video-audio data feeding mechanism, as a videodisc or a digital video signal CD, in order to reference video signal data that comprise a specific image model that one very first time of tool length is provided and a reference audio signal data of tool one second time span, one audio-visual coded system, audio-visual coded system as MPEG institute standard, in order to receive these reference video signal data that comprise this specific image model that tool should very first time length and this reference audio signal data of this second time span of tool, and the audio signal data that the video signal data and that produces a coding is encoded, an and data processing equipment, a personal computer for example, comprise a medium that can read, as a fixed storage device or a removable storage device, wherein write down a computer program, it is to receive the audio signal data of the video signal data of this coding and this coding and produce test video signal data that comprises this specific image model that tool should very first time length and test audio signal data of this second time span of tool, and detect and the very first time point at the audio signal information place that this reference audio signal data that this specific image model that these reference video signal data are comprised is synchronous is comprised, and one second time point at the audio signal information place that comprised of these synchronous test audio signal data of this specific image model that is comprised with this test video signal data, and calculate a difference value between this very first time point and this second time point.
The vision signal output of the above-mentioned audio-visual coded system of measurement more comprises a video-audio playing device with the system preferably of the synchronous error value of audio signal output, in order to via one vision signal/audio signal output interface these reference video signal data and this reference audio signal data are sent to this audio-visual coded system.Simultaneously, as mentioned above, the present invention also can put the synchronous error value that detects between vision signal output and audio signal output by the detection time of fixing a particular audio signal model.Therefore, another configuration of the vision signal output of the audio-visual coded system of measurement of the present invention and the system of the synchronous error value between audio signal output can comprise a video-audio data feeding mechanism, in order to the reference video signal data that one very first time of tool length is provided and a reference audio signal data that comprises a particular audio signal model of tool one second time span, one audio-visual coded system, in order to receive these reference video signal data that tool should very first time length and this reference audio signal data that comprises this particular audio signal model of this second time span of tool, and the audio signal data that the video signal data and that produces a coding is encoded, an and data processing equipment, comprise a medium that can read, wherein write down a computer program, it is to receive the audio signal data of the video signal data of this coding and this coding and produce the test video signal data that tool should very first time length and test audio signal data that comprise this particular audio signal model of this second time span of tool, and detect and the very first time point at the video signal information place that these reference video signal data that this particular audio signal model that this reference audio signal data is comprised is synchronous are comprised, and one second time point at the video signal information place that comprised of this synchronous test video signal data of this particular audio signal model that is comprised with these test audio signal data, and calculate a difference value between this very first time point and this second time point.
The conception of a third aspect of the present invention is to point to a kind of computer program, store an analysis tool, this analysis tool comprises an analytical equipment, receive the system flow that the reference audio signal data of the reference video signal data that comprise a specific image model of one very first time of tool length and tool one second time span is produced in order to receive via an audio-visual coded system, and produce a video signal flow and an audio signal stream, one audio signal code translator, export test audio signal data in order to receive this audio signal stream, one vision signal code translator, the test video signal data that comprises this specific image model that output device should very first time length in order to receive this video signal flow, an and routine analyzer, comprise a succession of calculation instruction, very first time point in order to the audio signal information place in this synchronous reference audio signal data of this specific image model in detection and these reference video signal data, and with these synchronous test audio signal data of this specific image model in this test video signal data in one second time point at an audio signal information place, and calculate a error amount between this very first time point and this second time point.
If put the synchronous error value that detects between vision signal output and audio signal output by the detection time of fixing a particular audio signal model, then the content of computer program of the present invention will comprise an analysis tool, this analysis tool further comprises an analytical equipment, receive the system flow that the reference audio signal data of the reference video signal data that comprise a specific image model of one very first time of tool length and tool one second time span is produced in order to receive via an audio-visual coded system, and produce a video signal flow and an audio signal stream, one audio signal code translator, export test audio signal data in order to receive this audio signal stream, one vision signal code translator, the test video signal data that comprises this specific image model that output device should very first time length in order to receive this video signal flow, an and routine analyzer, comprise a succession of calculation instruction, very first time point in order to the audio signal information place in this synchronous reference audio signal data of this specific image model in detection and these reference video signal data, and with these synchronous test audio signal data of this specific image model in this test video signal data in one second time point at an audio signal information place, and calculate a error amount between this very first time point and this second time point.
Description of drawings
Fig. 1 is shown in the system that is used for measuring synchronous accuracy between output of mpeg encoded video signal system and audio signal output in the preferred embodiment of the present invention;
Fig. 2 shows in the exemplary embodiments of the present invention, with the analysis tool in order to synchronous accuracy between video signal system output of measurement mpeg encoded and audio signal output of software realization; And
Fig. 3 is in order to explaining orally in the preferred embodiment of the present invention, and the routine analyzer bag is in order to measure a sequential chart of the algorithm of synchronous error value between output of mpeg encoded video signal system and audio signal output.
Embodiment
To illustrate by beneath preferred embodiment in order to the vision signal of the specific audio-visual coded system of measurement of the present invention and the method and system and the analysis tool thereof of audio signal synchronous accuracy.In preferred embodiment of the present invention, be to adopt that to develop the MPEG canonical system (MPEG compliant system) that forms based on the audio-visual compression standard of MPEG institute standard be a preferable audio-visual coded system, with the vision signal that illustrates the audio-visual coded system of measurement of the present invention and the technology of audio signal synchronous accuracy.Yet any employing can be after with the encoding video-audio data decoding the audio-visual coded system of the audio-visual compress technique of unlikely generation distortion, all can be embodied as audio-visual coded system of the present invention, and not break away from the scope of desire protection of the present invention.
See also Fig. 1, the technology of measurement vision signal of the present invention and audio signal synchronous accuracy, be to adopt the vision signal of particular design and audio signal model (pattern) to originate as the reference video-audio data of audio-visual coded system, then decipher the system flow that the mpeg encoded system is produced with the routine analyzer bag, and analyze video-audio data after the mpeg encoded system coding is deciphered again, can be automatically and the video-audio data after the decoding that forms a prompt judgement out produce nonsynchronous time point and its error amount in vision signal territory and audio signal territory.In Fig. 1, the system of synchronous accuracy comprises a video-audio playing device 10 between the vision signal output of the audio-visual coded system of measurement according to a preferred embodiment of the present invention and audio signal output, for example a video disk player (VCD player), CD-ROM drive (CD-ROM) or digital video signal CD player (DVD player).This video-audio playing device 10 is the audio-visual storage mediums that can be used to play record one a video-audio data source on it, as a CD (compactdisk, CD) or a Video CD (digital video disk, DVD).The video-audio data source that video-audio playing device 10 is write down, be to be an analog video signal/audio signal model (analog audio/video pattern) through particular design, be used as and be used for measuring the vision signal output of audio-visual coded system and the one reference video signal/audio signal data of audio signal output synchronous accuracy.These reference video signal/audio signal datas can see through one vision signal/audio signal output interface 101 mpeg encoded system 11 that is sent to and carry out vision signal/audio-frequency signal coding program.
According to a preferred embodiment of the present invention, the content of these reference video signal data can be designed to utilize in the time of suitable length Vt, for example in 30 seconds, put different image models (imagepattern) in each vision signal picture (video frame).For instance, in the image information system of NTSC, the picture cycle of vision signal (frame period) is 1/30 second, and meaning has 30 vision signal pictures in promptly one second.In 30 seconds, 30 * 30=900 vision signal picture promptly arranged, then need 900 different image models to be seated in respectively in each vision signal picture.On the other hand, in the image information system of PAL, the picture of vision signal and the cycle (frame period) is 1/25 second, meaning has 25 vision signal pictures (video frame) in promptly one second.If in 25 seconds, 25 * 25=625 vision signal picture promptly arranged, then need 625 different image models to be seated in respectively in each vision signal picture.These image models choose rule, then be must be through mpeg encoded system 11 codings again after the decoding, synchronous accuracy between vision signal output that enough information suitably differentiates mpeg encoded system 11 and audio signal output still can be provided.Simultaneously, the image model can take whole video signal picture, only need occupy enough zones and get final product, and general dynamic image can be put in other zone of vision signal picture as synchronous accuracy foundation between the vision signal output of judging mpeg encoded system 11 and audio signal output.In this preferred embodiment, the appropriate time length Vt of reference video signal data was made as 30 seconds.Yet, also can be with one section then one section use repeatedly of 30 seconds reference video signal data of this section, to produce long reference video signal data.
According to a preferred embodiment of the present invention, the content of this reference audio signal data can be designed to utilize that (wherein At is less than or equal to Vt at the time of suitable length At, and Vt is the multiple of At) in, in each adjacent unit length, put into different audio signal models.Therefore just need two kinds of different audio signal models.With At be 30 seconds be example, can put respectively 30 seconds quiet with 30 seconds single-tone or other recognizable audio signal data in L channel and R channel, other sound channel then can be put general audio signal data.These audio signal models choose rule, then be must be through mpeg encoded system 11 codings again after the decoding, synchronous accuracy between vision signal output that enough information suitably differentiates mpeg encoded system 11 and audio signal output still can be provided.In this preferred embodiment, the appropriate time length A t of reference audio signal data was made as 30 seconds or is the factor of Vt.Yet, also can be with one section then one section use repeatedly of audio signal data of this appropriate time length, to produce long reference audio signal data.
After mpeg encoded system 11 encodes to the reference audio signal data to the reference video signal data and in accordance with the mpeg audio signal standards in accordance with the MPEG video signal standard, just can export a mpeg system stream (MPEG system stream) to a data processing equipment 12, handle mpeg system stream and judge encoded video signal data and the coding audio signal data synchronization accuracy that mpeg encoded system 11 is exported by data processing equipment 12.This data processing equipment 12, the preferably can be a personal computer (PC) and forms, and it comprises a medium that can read (not demonstrating).Mpeg system stream will be by this medium that can read that is recorded on the data processing equipment 12, it can be the audio-visual code synchronism accuracy analysis software kit of the cover of one in a fixed storage device (as Winchester disk drive or CD-ROM drive) or the removable storage device (as a flash memory cards), carries out the MPEG vision signal output of mpeg encoded system 11 and the routine analyzer of audio signal output.
Fig. 2 show according to a preferred embodiment of the present invention the output of measurement mpeg encoded video signal system and audio signal output between synchronous accuracy realize the analysis tool of (software-implemented) with software.Such as before explanation, the system flow that mpeg encoded system 11 is exported in Fig. 1 will be transferred into data processing equipment 12.Record a routine analyzer bag in the medium that one of data processing equipment 12 can read, it is the analysis tool as synchronous accuracy between vision signal output of measuring mpeg encoded system 11 and audio signal output.As shown in Figure 2, the mpeg encoded video signal system of a preferred embodiment of the present invention and audio signal signal Synchronization accuracy analysis instrument are made up of a plurality of software program squares, and each software program square is to finish a special task (task) by configuration and setting.This analysis tool comprises a vision signal audio signal analysis device (AV parser), the mpeg system stream of being exported in order to the mpeg encoded system 11 that receives Fig. 1, and one separated the multiplexer (not shown) and mpeg system stream is separated multitask go out a MPEG video signal flow (MPEG video stream) via what wherein comprise, also be called MPEG vision signal bit stream (MPEG video bit stream), and a MEPG audio signal stream (MPEG audiostream), also be called mpeg audio signal bit stream (MPEG audio bit stream).MPEG video signal decoder 21 all is made up of a plurality of buffers, digit buffer (bit buffer), controller and core circuit (core circuit) with mpeg audio signal decoder 22.MPEG video signal decoder 21 decompresses with compressed video signal data package and compressing audio signal data packet that mpeg audio signal decoder 22 will be exported mpeg encoded system 11 respectively, and exports a test video signal data and test audio signal data.
For reaching the aforesaid purpose of the present invention, audio-visual coded system vision signal output language audio signal output synchronous accuracy analysis tool of the present invention more comprises the analytical equipment 23 that a routine analyzer is finished, comprise a succession of calculation instruction, with the test video signal data that detects this mpeg encoded system 11 and test audio signal data synchronization whether it can be performed, and calculate the error amount between video signal data and audio signal data.Analytical equipment 23 is based on utilizing the known reference video signal data and the content of reference audio signal data, itself and can put the audio and video information that provides known at any time.Analytical equipment 23 utilizes known reference video signal data and reference audio signal data to be as the criterion, and the content of contrast test video signal data and test audio signal data is promptly known the synchronous error value.
See also Fig. 3.If the reference video signal information at known time point T0 is F0, the reference audio signal message is A0.If analytical equipment finds that the test video signal message of known time point T0 is F0, and the test audio signal information of the test video signal message F0 of corresponding time point T0 is not to be A0, but is An.Yet it is just right that in fact audio signal information An should be the audio signal information of time point Tn.Therefore analytical equipment can find that the synchronous error value at time point T0 is Tn-T0 after analyzing with reference to video-audio data and test video-audio data.If this synchronous error value be on the occasion of, represent the leading test video signal data of test audio signal data; If this synchronous error value is a negative value, represent the leading test audio signal data of test video signal data.
Calculating the tolerance of audio-visual synchronous error value, suppose Vt=n * At about analysis tool of the present invention, then when n=1, tolerance is-Vt is between the Vt.When n＞1, tolerance is-(Vt * (n-1)/n) is to (between the Vt * (n-1)/n).And, it should be noted that the foregoing description is the time difference between the corresponding audio signal data of utilize observing with same time point of video signal data, judge that audio-visual coded system vision signal is exported and audio signal output between the synchronous error value.However, the technology of the audio-visual synchronous error value of measurement similarly of the present invention also can utilize observe and the audio signal data video signal corresponding data of same time point between time difference, judge the vision signal output of audio-visual coded system and the synchronous error value between audio signal output, and can obtain correct measurement result.
By the explanation of above preferred embodiment as can be known, the vision signal output of the audio-visual coded system of measurement of the present invention and the technology of the synchronous accuracy between audio signal output, be will be after the reference video-audio data of particular design is imported audio-visual coded system, utilize the analysis tool that is recorded in the medium that one of a data processing equipment can read that the test video-audio data is deciphered out in the audio-visual output of audio-visual coded system.Then utilize routine analyzer in the analysis tool to detect the test video-audio data nonsynchronous time point takes place, and calculate the synchronous error value between video-audio data according to known reference video-audio data content.Therefore the present invention provides a kind of automatic detection substantially and calculates synchronous error value between audio-visual coded system vision signal output and audio signal output, adopts artificial come the vision signal output of audio-visual coded system and the synchronous error value between audio signal output to replace prior art.No matter how small the synchronous error value between the vision signal of audio-visual coded system output and audio signal output has whereby, audio-visual synchronous error value measuring technique of the present invention can detect it rapidly and accurately, avoids the intervention of manpower.
Claims (15)
1. measure the method that video/audio is exported synchronous accuracy for one kind, be applied to an audio-visual coded system, and look the signal data of audio frequency to obtain a test by an audiovisual information analyzer, an audio-frequency information decoder and a video information decoder, it is characterized in that comprising the following steps:
One reference audio signal data of the reference video signal data that comprise a specific image model and tool one second time span of one very first time of tool length is provided;
These reference video signal data and this audio-visual coded system of this reference audio signal data input are encoded, and produce the video signal data of a coding separately and the audio signal data of a coding by this audiovisual information analyzer;
Handle the video signal data of this coding and the audio signal data of this coding respectively by this audio-frequency information decoder and this video information decoder, to produce test video signal data that comprises this specific image model that tool should very first time length and test audio signal data of this second time span of tool; And
Very first time point with the audio signal information place in this synchronous reference audio signal data of this specific image model in analysis tool detection and these reference video signal data, and with these synchronous test audio signal data of this specific image model in this test video signal data in one second time point at an audio signal information place, and calculate a difference value between this very first time point and this second time point.
2. the method for claim 1, the audio signal data that it is characterized in that handling respectively the video signal data of this coding and this coding more comprises the following steps: with the step of the test audio signal data that produce a test video signal data that comprises this specific image model that tool should very first time length and this second time span of tool
Respectively the video signal data of this coding and the audio signal data of this coding are carried out one fen multiplexing process and produce the video signal flow of a coding and the audio signal stream of a coding; And
Decipher the video signal flow of this coding and the audio signal stream of this coding respectively, to produce this test video signal data that comprises this specific image model that tool should very first time length and these test audio signal data of this second time span of tool.
3. the method for claim 1 is characterized in that this specific image model is the some that occupies the vision signal picture in these reference video signal data.
4. the method for claim 1 is characterized in that this very first time length is the multiple for this second time span.
5. measure the method that video/audio is exported synchronous accuracy for one kind, be applied to an audio-visual coded system, and look the signal data of audio frequency to obtain a test by an audiovisual information analyzer, an audio-frequency information decoder and a video information decoder, it is characterized in that comprising the following steps:
A reference audio signal data that comprises a particular audio signal model of the one reference video signal data and tool one second time span of one very first time of tool length is provided;
These reference video signal data and this audio-visual coded system of this reference audio signal data input are encoded, and produce the video signal data of a coding separately and the audio signal data of a coding by this audiovisual information analyzer;
Handle the video signal data of this coding and the audio signal data of this coding respectively by this audio-frequency information decoder and this video information decoder, to produce the test video signal data that tool should very first time length and test audio signal data that comprise this particular audio signal model of this second time span of tool; And
Very first time point with the video signal information place in these synchronous reference video signal data of this particular audio signal model in analysis tool detection and this reference audio signal data, and with this synchronous test video signal data of this particular audio signal model in these test audio signal data in one second time point at a video signal information place, and calculate a difference value between this very first time point and this second time point.
6. method as claimed in claim 5, it is characterized in that handling respectively the video signal data of this coding and the audio signal data of this coding, step with the test audio signal data that comprise this particular audio signal model that produce a test video signal data that tool should very first time length and this second time span of tool more comprises the following steps:
Respectively the video signal data of this coding and the audio signal data of this coding are carried out one fen multiplexing process and produce the video signal flow of a coding and the audio signal stream of a coding; And
Decipher the video signal flow of this coding and the audio signal stream of this coding respectively, to produce this test video signal data that tool should very first time length and these test audio signal data that comprise this particular audio signal model of this second time span of tool.
7. measure the system that video/audio is exported synchronous accuracy for one kind, be applied to an audio-visual coded system, look the signal data of audio frequency by an audiovisual information analyzer, an audio-frequency information decoder and a video information decoder to obtain a test, it is characterized in that comprising:
One video-audio data feeding mechanism is in order to reference video signal data that comprise a specific image model that one very first time of tool length is provided and a reference audio signal data of tool one second time span;
This audio-visual coded system is encoded in order to this reference audio signal data that receives these reference video signal data that comprise this specific image model that tool should very first time length and this second time span of tool and is produced a system flow; And
One data processing equipment, it is to receive test video signal data that comprises this specific image model that video signal data that this system flow produces a coding separately should very first time length by this audio-frequency information decoder and this video information decoder generation tool with the audio signal data of a coding and test audio signal data of this second time span of tool by this audiovisual information analyzer, and detect the very first time point of this synchronous reference audio signal of this specific image model of being comprised with these reference video signal data according to an audio signal information place that is comprised, and one second time point at the audio signal information place that comprised of these synchronous test audio signal data of this specific image model that is comprised with this test video signal data, and calculate a difference value between this very first time point and this second time point.
8. system as claimed in claim 7 is characterized in that this video-audio data feeding mechanism is a kind of for a VCD player and a digital video signal CD player.
9. system as claimed in claim 7 is characterized in that more comprising a video-audio playing device, in order to via one vision signal/audio signal output interface these reference video signal data and this reference audio signal data are sent to this audio-visual coded system.
10. system as claimed in claim 7 is characterized in that this audio-visual coded system is the coded system for motion picture expert group institute standard.
11. system as claimed in claim 7 is characterized in that this data processing equipment is to be a personal computer.
12. system as claimed in claim 7 is characterized in that this medium that can read is to be a fixed storage device or a removable storage device.
13. system as claimed in claim 7 is characterized in that this data processing equipment comprises an analysis tool, wherein:
This analysis tool comprises an analytical equipment, in order to the video signal data that receives this coding and the audio signal data of this coding, and produce a video signal flow and an audio signal stream, one audio signal code translator, these test audio signal data of this second time span of output device in order to receive this audio signal stream, one vision signal code translator, the test video signal data that comprises this specific image model that output device should very first time length in order to receive this video signal flow, this analytical equipment is finished an analyzing and processing, very first time point in order to the audio signal information place in this synchronous reference audio signal data of this specific image model in detection and these reference video signal data, and with these synchronous test audio signal data of this specific image model in this test video signal data in one second time point at an audio signal information place, and calculate a error amount between this very first time point and this second time point.
14. system of measuring video/audio output synchronous accuracy, be applied to an audio-visual coded system, look the signal data of audio frequency by an audiovisual information analyzer, an audio-frequency information decoder and a video information decoder to obtain a test, it is characterized in that comprising:
One video-audio data feeding mechanism is in order to the reference video signal data that one very first time of tool length is provided and a reference audio signal data that comprises a particular audio signal model of tool one second time span;
This audio-visual coded system is encoded in order to this reference audio signal data that comprises this particular audio signal model that receives these reference video signal data that tool should very first time length and this second time span of tool and is produced a system flow; And
One data processing equipment, it is to receive the test video signal data that video signal data that this system flow produces a coding separately should very first time length by this audio-frequency information decoder and this video information decoder generation tool with the audio signal data of a coding and test audio signal data that comprise this particular audio signal model of this second time span of tool by this audiovisual information analyzer, and detect and the very first time point at the video signal information place that these reference video signal data that this particular audio signal model that this reference audio signal data is comprised is synchronous are comprised, and one second time point at the video signal information place that comprised of this synchronous test video signal data of this particular audio signal model that is comprised with these test audio signal data, and calculate a difference value between this very first time point and this second time point.
15. system as claimed in claim 14 is characterized in that this data processing equipment comprises an analysis tool, wherein:
This analysis tool comprises an analytical equipment, in order to the video signal data that receives this coding and the audio signal data of this coding, and produce a video signal flow and an audio signal stream, one audio signal code translator, these test audio signal data that comprise this particular audio signal model of this second time span of output device in order to receive this audio signal stream, one vision signal code translator, this test video signal data that output device should very first time length in order to receive this video signal flow, this analytical equipment is finished an analyzing and processing, very first time point in order to the video signal information place in these synchronous reference video signal data of this particular audio signal model in detection and this reference audio signal data, and with this synchronous test video signal data of this particular audio signal model in these test audio signal data in one second time point at a video signal information place, and calculate a error amount between this very first time point and this second time point.
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| CN 02103110 Expired - Fee Related CN1207922C (en) | 2002-01-30 | 2002-01-30 | Method and system for measuring accuracy of video/audio output synchronization, and analysis means |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3856792B2 (en) * | 2004-01-16 | 2006-12-13 | 松下電器産業株式会社 | Signal processing device |
| CN101170704B (en) * | 2007-11-22 | 2011-06-22 | 中兴通讯股份有限公司 | Labial synchronization testing method and device |
| CN103796006A (en) * | 2012-10-30 | 2014-05-14 | 中兴通讯股份有限公司 | System and method for labial sound synchronization test |
| CN103051921B (en) * | 2013-01-05 | 2014-12-24 | 北京中科大洋科技发展股份有限公司 | Method for precisely detecting video and audio synchronous errors of video and audio processing system |
| TWI625059B (en) | 2015-08-17 | 2018-05-21 | 新加坡商雲網科技新加坡有限公司 | Terminal device and method for audio video synchronization |
| CN106470339B (en) * | 2015-08-17 | 2018-09-14 | 南宁富桂精密工业有限公司 | Terminal device and audio video synchronization detection method |
| CN109583670B (en) * | 2017-09-28 | 2020-12-04 | 北京嘀嘀无限科技发展有限公司 | Control experiment method, system and computer device based on time slice rotation |
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