CN107835423A - A kind of statistical-multiplexing encoding performance test and evaluation method - Google Patents
A kind of statistical-multiplexing encoding performance test and evaluation method Download PDFInfo
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- CN107835423A CN107835423A CN201710794082.5A CN201710794082A CN107835423A CN 107835423 A CN107835423 A CN 107835423A CN 201710794082 A CN201710794082 A CN 201710794082A CN 107835423 A CN107835423 A CN 107835423A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/154—Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
- H04N19/89—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder
Abstract
The invention discloses a kind of test and evaluation method for statistical-multiplexing encoding image averaging quality, wherein：Statistical-multiplexing encoding picture quality equilibrium degree, with cbr (constant bit rate) coding quality versus, can effectively measure statistical be multiplexed it is whether effective；Statistical-multiplexing encoding video code rate is fluctuated, and different measurement parameters is used according to different links, not only reliable but also practical；Each road coding and decoding video of statistical-multiplexing encoding is always delayed, and designs exclusive test source, can truly reflect the encoding and decoding delay of practical situations；Statistical-multiplexing encoding audio frequency and video relative time delay, designs exclusive test source, can truly reflect the audio frequency and video relative time delay of practical situations；Statistical-multiplexing encoding transmitting stream index, transmitting stream index that can comprehensively in measure statistical multiplexing and encoding code stream；Statistical-multiplexing encoding video-frequency basic flow standard compliance, video-frequency basic flow index that can comprehensively in measure statistical multiplexing and encoding code stream.
Description
Technical field
The present invention relates to technical field of data transmission, more particularly to a kind of statistical-multiplexing encoding performance test and evaluation side
Method.
Background technology
When radio and television transmission of video encodes, in order to make full use of transmission bandwidth resource, program video quality, warp are improved
Statistical-multiplexing encoding mode can often be used.When statistical-multiplexing encoding refers to multi-channel video while is compressed coding, Neng Goushi
The image severity of each road videos of Shi Tongji, it is dynamically every road video distribution coded-bit in the case where total bandwidth is constant
Rate (the more code check of the higher video distribution of severity, the less code check of the relatively low video distribution of severity) so that multichannel section
Purpose image oeverall quality gets a promotion.
In radio data system at home and abroad, statistical-multiplexing encoding has more universal application, however, to statistic multiplexing
The test and assessment of coded system or equipment performance, but there is no and disclose effective method.
The content of the invention
In view of the drawbacks described above of prior art, the technical problems to be solved by the invention are to provide a kind of statistic multiplexing and compiled
Code performance test and evaluation method, this method include the test and assessment of 7 indexs altogether.Index includes：Statistical-multiplexing encoding figure
As average quality, statistical-multiplexing encoding picture quality equilibrium degree, the fluctuation of statistical-multiplexing encoding video code rate, statistical-multiplexing encoding are each
Road coding and decoding video is always delayed, statistical-multiplexing encoding audio frequency and video relative time delay, statistical-multiplexing encoding transmitting stream index, statistic multiplexing
Encoded video Elementary Stream standard compliance.
To achieve the above object, the invention provides a kind of statistical-multiplexing encoding performance test and evaluation method, including bag
Test and assessment containing 7 indexs, respectively statistical-multiplexing encoding image averaging quality, statistical-multiplexing encoding picture quality are balanced
Degree, the fluctuation of statistical-multiplexing encoding video code rate, each road coding and decoding video of statistical-multiplexing encoding is always delayed, statistical-multiplexing encoding sound regards
Frequency relative time delay, statistical-multiplexing encoding transmitting stream index, statistical-multiplexing encoding video-frequency basic flow standard compliance.
Further, the method for testing of the statistical-multiplexing encoding image averaging quality is：
Step 11：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), Video Decoder and figure
As quality subjective evaluation system；
Step 12：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
Step 13：Video work station plays test source video signal, by the source of 4 different severities designed by step 12
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 14：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate is set according to practical application request；
Step 15：Make decoder normal work in decoded state；
Step 16：With picture quality subjective assessment system respectively to 1~source video signal of source video signal 4, decoding video 1
~decoding video 4 is acquired；
Step 17：Using GY/T 134《Digital TV image quality subjective evaluation method》In double stimulation continuous mass marks
The video that degree subjective evaluation method is gathered to step 16 carries out subjective assessment, evaluates the image of source video and decoding video respectively
Quality, and image quality decrease percentage of the decoding video relative to source video is calculated, obtain the image quality decrease of 4 sequences
Percentage, as final testing result；
The appraisal procedure of the statistical-multiplexing encoding image averaging quality is：In statistical-multiplexing encoding practical application code check
Under, for 4 image quality decrease percentages obtained by testing, if 3 numerical value (are assumed to be less than a certain threshold value
Threshold value 1), the 4th numerical value is less than another larger threshold value (being assumed to be threshold value 2), then it is believed that the statistical-multiplexing encoding system
The image averaging quality test results of (or equipment) meet application demand.
Further, the method for testing of the statistical-multiplexing encoding picture quality equilibrium degree is：
Step 21：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), Video Decoder and figure
As mass-synchrometer；
Step 22：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
Step 23：Video work station plays test source video signal, by the source of 4 different severities designed by step 22
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 24：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate is set according to practical application request；
Step 25：Make decoder normal work in decoded state；
Step 26：With image quality analysis instrument respectively to 1~source video signal of source video signal 4, decoding video 1~decoding
Video 4 is acquired；
Step 27：The video gathered using image quality analysis instrument to step 26 carries out image quality analysis, and analysis refers to
Mark can be PQR (or SSIM), obtain the PQR of 4 sequencesstat(or SSIMstat), and calculate this 4 PQRstat(or
SSIMstat) average value and mean square deviation；
Step 28：It is sequentially connected video work station, reference encoder device, Video Decoder and image quality analysis instrument；
Step 29：Video work station plays test source video signal, by the source of 4 different severities designed by step 22
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 210：Make reference encoder device normal work in cbr (constant bit rate) encoding state, single channel coding average bit rate and step
4 is identical；
Step 211：Make decoder normal work in decoded state；
Step 212：With image quality analysis instrument respectively to 1~source video signal of source video signal 4, decoding video 1~solution
Code video 4 is acquired；
Step 213：The video gathered using image quality analysis instrument to step 212 carries out image quality analysis, analysis
Index should (PQR or SSIM) identical with step 7, obtain the PQR of 4 sequencesCBR(or SSIMCBR), and calculate this 4 PQRCBR(or
SSIMCBR) average value and mean square deviation；
Step 214：Final testing result is used as using the average value obtained by step 27 and step 213 and mean square deviation；
The appraisal procedure of the statistical-multiplexing encoding picture quality equilibrium degree is：In statistical-multiplexing encoding practical application code
Under rate, the PQR obtained by method of testing step 27statMean square deviation (or SSIMstatMean square deviation) compared to method of testing step 213 institute
The PQR obtainedCBRMean square deviation (or SSIMCBRMean square deviation) reduce a certain ratio, then (or set it is believed that the statistical-multiplexing encoding system
It is standby) picture quality equilibrium degree test result meet practical application request.
Further, the method for testing of the statistical-multiplexing encoding video code rate fluctuation is：
Step 31：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), Transport Stream Analyzer and code
Rate analyzer；
Step 32：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
Step 33：Video work station plays test source video signal, by the source of 4 different severities designed by step 32
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 34：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate, maximal rate and minimum code rate are set according to practical application request；
Step 35：Code multiplexing stream is recorded using Transport Stream Analyzer, duration is recorded and is not less than source video duration；
Step 36：The code check statistical window for setting code check analyzer is 20ms, and window move mode slides for 20ms, to step
Rapid 35, which record transmission stream file, carries out code check analysis, obtains four road video total bitrates；
Step 37：The code check statistical window for setting code check analyzer is 1000ms, and window move mode is
20ms is slided, and each road video that transmission stream file is recorded to step 35 carries out single channel video code rate statistical one by one
Analysis, obtains 4 groups of single channel video code rate curves of cyclical fluctuations；
Step 38：With 4 groups of single channel video codes obtained by the four road video total bitrate values and step 37 obtained by step 36
The rate curve of cyclical fluctuations is as final testing result；
The appraisal procedure of statistical-multiplexing encoding video code rate fluctuation is：In statistical-multiplexing encoding practical application code check
Under, if four road video total bitrate values obtained by method of testing step 36 are not more than a certain threshold value (being assumed to be threshold value 1), and walk
Single channel video code rate fluctuation maximum obtained by rapid 37 is not more than a certain threshold value (being assumed to be threshold value 2), single channel video code rate ripple
Dynamic minimum value is not less than a certain threshold value (being assumed to be threshold value 3), then it is believed that the video of the statistical-multiplexing encoding system (or equipment)
Code check wave testing result meets practical application request.
Further, each total time-delay test method of road coding and decoding video of the statistical-multiplexing encoding is：
Step 41：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), Video Decoder sum
Character waveform oscillograph；
Step 42：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》The middle test image sequence for choosing 4 different severities, wherein 1 severity is higher, 1 severity is relatively low, in addition 2
Individual severity is medium, and time-code formation source video file frame by frame is superimposed to 4 image sequences of selection；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》The middle test image sequence for choosing 4 different severities, wherein 1 severity is higher, 1 severity is relatively low, in addition 2
Individual severity is medium, and time-code formation source video file frame by frame is superimposed to 4 image sequences of selection；
Step 43：Video work station plays test source video signal, by the source of 4 different severities designed by step 42
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 44：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate is set according to practical application request；
Step 45：Make decoder normal work in decoded state, and code multiplexing Liu Zhongge roads video is carried out successively
Real-time decoding；
Step 46：Decoding video and corresponding source video are supervised simultaneously with digital waveform oscillograph, by conversation structure
Time-code, the encoding and decoding for calculating each road video are always delayed, as final testing result；
Each road coding and decoding video of statistical-multiplexing encoding appraisal procedure that is always delayed is：If each road of statistical-multiplexing encoding regards
The maximum that the encoding and decoding of each road video obtained by the total time-delay test method of frequency encoding and decoding are always delayed is not more than a certain threshold value, then
Needed it is believed that the total delay test result of each road coding and decoding video of the statistical-multiplexing encoding system (or equipment) meets practical application
Ask.
Further, the method for testing of the statistical-multiplexing encoding audio frequency and video relative time delay is：
Step 51：Be sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), video-audio decoder and
Digital waveform oscillograph；
Step 52：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》The middle test image sequence for choosing 3 different severities, wherein 1 severity is higher, 2 severities are medium in addition, then
Design one meets GB/T 22150-2008《The relative timing of television broadcasting sound and image》The test signal of testing requirement,
Form 4 road source signals；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》The middle test image sequence for choosing 3 different severities, wherein 1 severity is higher, 2 severities are medium in addition, then
Design one meets GB/T 22150-2008《The relative timing of television broadcasting sound and image》The test signal of testing requirement,
Form 4 road source signals；
Step 53：Video work station plays test source video signal, by the source of 4 different severities designed by step 52
Signal progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 54：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate is set according to practical application request；
Step 55：Make video-audio decoder normal work in decoded state, and code multiplexing Liu Zhongge roads are regarded successively
Audio carries out real-time decoding；
Step 56：The audio frequency and video relative time delay of each road signal is measured simultaneously with digital waveform oscillograph, as final test
As a result；
The appraisal procedure of the statistical-multiplexing encoding audio frequency and video relative time delay is：If statistical-multiplexing encoding audio frequency and video are relative
Audio frequency and video relative time delay obtained by time-delay test method is in a certain threshold range, then it is believed that the statistical-multiplexing encoding system
The audio frequency and video relative time delay test result of (or equipment) meets practical application request.
Further, the method for testing of the statistical-multiplexing encoding transmitting stream index is：
Step 61：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment) and Transport Stream Analyzer；
Step 62：Design test source video signal；
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
Step 63：Video work station plays test source video signal, by the source of 4 different severities designed by step 62
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 64：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate is set according to practical application request；
Step 65：Code stream analysis is used with tested statistical-multiplexing encoding system (or equipment) exports coding multiplex stream
4 program streams are analyzed respectively, and analysis indexes include transmitting stream standard compliance, the PCR shakes of each program, PCR repetitions
Interval, pat table recurrence interval, pmt table recurrence interval and PTS recurrence intervals, and to the V1.2.1 standards of ETSI TR 101 290
Defined in the mistake relevant with encoder be monitored, the duration be 15 minutes；
The appraisal procedure of the statistical-multiplexing encoding transmitting stream index is：If statistical-multiplexing encoding transmitting stream index test
The PCR shakes of transmitting stream standard compliance, each program obtained by method, PCR recurrence intervals, pat table recurrence interval, PMT
Table recurrence interval and PTS recurrence intervals meet GB/T 17975.1-2010《Information technology moving image and its sound information it is logical
With coding part 1：System》Requirement, and the V1.2.1 monitoring results of ETSI TR 101 290 have no mistake, then it is believed that should
The transmitting stream index test result of statistical-multiplexing encoding system (or equipment) meets practical application request.
Further, the statistical-multiplexing encoding video-frequency basic flow standard compliance testing method is：
Step 71：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), Transport Stream Analyzer and base
This flow point analyzer；
Step 72：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
Step 73：Video work station plays test source video signal, by the source of 4 different severities designed by step 72
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 74：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate, maximal rate and minimum code rate are set according to practical application request；
Step 75：Code multiplexing stream is recorded using Transport Stream Analyzer, duration is recorded and is not less than source video duration；
Step 76：Transmission stream file Zhong Ge roads video-frequency basic flow is recorded to step 75 with basic flow analyzer and carries out standard
Accordance is analyzed；
The statistical-multiplexing encoding video-frequency basic flow standard compliance appraisal procedure is：If statistical-multiplexing encoding video base
Basic flow standard compliance result obtained by this flow standard compliance testing method meets the requirement of associated video coding standard,
Then it is believed that the basic flow Standard conformance test result of the statistical-multiplexing encoding system (or equipment) meets practical application request.
The beneficial effects of the invention are as follows：
A kind of test and evaluation method for statistical-multiplexing encoding image averaging quality of the present invention, designs exclusive survey
Examination source, it can effectively reflect statistical-multiplexing encoding performance.Wherein：The test and evaluation of statistical-multiplexing encoding picture quality equilibrium degree
Method, with cbr (constant bit rate) coding quality versus, can effectively measure statistical be multiplexed it is whether effective；Statistical-multiplexing encoding video codes
The test and evaluation method of rate fluctuation, different measurement parameters is used according to different links, not only reliable but also practical；Statistic multiplexing
The test and evaluation method that each road coding and decoding video is always delayed is encoded, exclusive test source is designed, can truly reflect practical application
The encoding and decoding delay of situation；The test and evaluation method of statistical-multiplexing encoding audio frequency and video relative time delay, designs exclusive test source,
The audio frequency and video relative time delay of practical situations can truly be reflected；The test and evaluation side of statistical-multiplexing encoding transmitting stream index
Method, transmitting stream index that can comprehensively in measure statistical multiplexing and encoding code stream；Statistical-multiplexing encoding video-frequency basic flow standard meets
The test and evaluation method of property, video-frequency basic flow index that can comprehensively in measure statistical multiplexing and encoding code stream.
Design, concrete structure and the caused technique effect of the present invention are described further below with reference to accompanying drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is the statistical-multiplexing encoding image averaging quality test connection figure of the present invention.
Fig. 2 is the statistical-multiplexing encoding picture quality equilibrium degree test connection figure 1 of the present invention.
Fig. 3 is the statistical-multiplexing encoding picture quality equilibrium degree test connection figure 2 of the present invention.
Fig. 4 is the statistical-multiplexing encoding video code rate wave testing connection figure of the present invention.
Fig. 5 is the total delay test connection figure of each road coding and decoding video of statistical-multiplexing encoding of the present invention.
Fig. 6 is the statistical-multiplexing encoding audio frequency and video relative time delay test connection figure of the present invention.
Fig. 7 is the statistical-multiplexing encoding transmitting stream index test connection figure of the present invention.
Fig. 8 is the statistical-multiplexing encoding video-frequency basic flow Standard conformance test connection figure of the present invention.
Embodiment
As shown in figures 1-8, a kind of statistical-multiplexing encoding performance test and evaluation method, including include the test of 7 indexs
And assessment, respectively statistical-multiplexing encoding image averaging quality, statistical-multiplexing encoding picture quality equilibrium degree, statistical-multiplexing encoding
Video code rate fluctuation, each road coding and decoding video of statistical-multiplexing encoding are always delayed, statistical-multiplexing encoding audio frequency and video relative time delay, statistics
Multiplexing and encoding transmitting stream index, statistical-multiplexing encoding video-frequency basic flow standard compliance.
Relational language of the present invention is explained as follows：
PQR(Picture Quality Ratio)：An index of picture quality is weighed, the index uses and is based on people
The mathematical modeling of eye subjective vision system performance, comparing calculation is carried out to source images and by altimetric image, assesses image lesion.
SSIM(Structural SIMilarity)：Weigh one by altimetric image and the structural similarity of source images
Index.
PCR(Program Clock Reference)：Indicate the time tag of the instantaneous value of system clock in itself.
PAT(Program Association Table)：Program Association Table, define all in current transmitting stream
Program.
PMT(Program Map Table)：Program Map Table, define program video in current transmitting stream, program
The PID (unique identifier) of the contents such as audio.
PTS(Presentation Time Stamp)：Presentation Time Stamp, indicate the display time of Voice ＆ Video.
In the present embodiment, the method for testing of the statistical-multiplexing encoding image averaging quality is：
Step 11：As shown in figure 1, it is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), video
Decoder and picture quality subjective assessment system；
Step 12：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
Step 13：Video work station plays test source video signal, by the source of 4 different severities designed by step 12
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 14：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate is set according to practical application request；
Step 15：Make decoder normal work in decoded state；
Step 16：With picture quality subjective assessment system respectively to 1~source video signal of source video signal 4, decoding video 1
~decoding video 4 is acquired；
Step 17：Using GY/T 134《Digital TV image quality subjective evaluation method》In double stimulation continuous mass marks
The video that degree subjective evaluation method is gathered to step 16 carries out subjective assessment, evaluates the image of source video and decoding video respectively
Quality, and image quality decrease percentage of the decoding video relative to source video is calculated, obtain the image quality decrease of 4 sequences
Percentage, as final testing result；
The appraisal procedure of the statistical-multiplexing encoding image averaging quality is：In statistical-multiplexing encoding practical application code check
Under, for 4 image quality decrease percentages obtained by testing, if 3 numerical value (are assumed to be less than a certain threshold value
Threshold value 1), the 4th numerical value is less than another larger threshold value (being assumed to be threshold value 2), then it is believed that the statistical-multiplexing encoding system
The image averaging quality test results of (or equipment) meet application demand.
In the present embodiment, the method for testing of the statistical-multiplexing encoding picture quality equilibrium degree is：
Step 21：As shown in Fig. 2 it is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), video
Decoder and image quality analysis instrument；
Step 22：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
Step 23：Video work station plays test source video signal, by the source of 4 different severities designed by step 22
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 24：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate is set according to practical application request；
Step 25：Make decoder normal work in decoded state；
Step 26：With image quality analysis instrument respectively to 1~source video signal of source video signal 4, decoding video 1~decoding
Video 4 is acquired；
Step 27：The video gathered using image quality analysis instrument to step 26 carries out image quality analysis, and analysis refers to
Mark can be PQR (or SSIM), obtain the PQR of 4 sequencesstat(or SSIMstat), and calculate this 4 PQRstat(or
SSIMstat) average value and mean square deviation；
Step 28：As shown in figure 3, it is sequentially connected video work station, reference encoder device, Video Decoder and picture quality point
Analyzer；
Step 29：Video work station plays test source video signal, by the source of 4 different severities designed by step 22
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 210：Make reference encoder device normal work in cbr (constant bit rate) encoding state, single channel coding average bit rate and step
4 is identical；
Step 211：Make decoder normal work in decoded state；
Step 212：With image quality analysis instrument respectively to 1~source video signal of source video signal 4, decoding video 1~solution
Code video 4 is acquired；
Step 213：The video gathered using image quality analysis instrument to step 212 carries out image quality analysis, analysis
Index should (PQR or SSIM) identical with step 7, obtain the PQR of 4 sequencesCBR(or SSIMCBR), and calculate this 4 PQRCBR(or
SSIMCBR) average value and mean square deviation；
Step 214：Final testing result is used as using the average value obtained by step 27 and step 213 and mean square deviation；
The appraisal procedure of the statistical-multiplexing encoding picture quality equilibrium degree is：In statistical-multiplexing encoding practical application code
Under rate, the PQR obtained by method of testing step 27statMean square deviation (or SSIMstatMean square deviation) compared to method of testing step 213 institute
The PQR obtainedCBRMean square deviation (or SSIMCBRMean square deviation) reduce a certain ratio, then (or set it is believed that the statistical-multiplexing encoding system
It is standby) picture quality equilibrium degree test result meet practical application request.
In the present embodiment, the method for testing of the statistical-multiplexing encoding video code rate fluctuation is：
Step 31：As shown in figure 4, it is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), code stream
Analyzer and code check analyzer；
Step 32：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
Step 33：Video work station plays test source video signal, by the source of 4 different severities designed by step 32
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 34：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate, maximal rate and minimum code rate are set according to practical application request；
Step 35：Code multiplexing stream is recorded using Transport Stream Analyzer, duration is recorded and is not less than source video duration；
Step 36：The code check statistical window for setting code check analyzer is 20ms, and window move mode slides for 20ms, to step
Rapid 35, which record transmission stream file, carries out code check analysis, obtains four road video total bitrates；
Step 37：The code check statistical window for setting code check analyzer is 1000ms, and window move mode slides for 20ms, right
Each road video that step 35 records transmission stream file carries out single channel video code rate statistical analysis one by one, obtains 4 groups of single channel video codes
The rate curve of cyclical fluctuations；
Step 38：With 4 groups of single channel video codes obtained by the four road video total bitrate values and step 37 obtained by step 36
The rate curve of cyclical fluctuations is as final testing result；
The appraisal procedure of statistical-multiplexing encoding video code rate fluctuation is：In statistical-multiplexing encoding practical application code check
Under, if four road video total bitrate values obtained by method of testing step 36 are not more than a certain threshold value (being assumed to be threshold value 1), and walk
Single channel video code rate fluctuation maximum obtained by rapid 37 is not more than a certain threshold value (being assumed to be threshold value 2), single channel video code rate ripple
Dynamic minimum value is not less than a certain threshold value (being assumed to be threshold value 3), then it is believed that the video of the statistical-multiplexing encoding system (or equipment)
Code check wave testing result meets practical application request.
In the present embodiment, each total time-delay test method of road coding and decoding video of statistical-multiplexing encoding is：
Step 41：As shown in figure 5, it is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), video
Decoder and digital waveform oscillograph；
Step 42：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》The middle test image sequence for choosing 4 different severities, wherein 1 severity is higher, 1 severity is relatively low, in addition 2
Individual severity is medium, and time-code formation source video file frame by frame is superimposed to 4 image sequences of selection；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》The middle test image sequence for choosing 4 different severities, wherein 1 severity is higher, 1 severity is relatively low, in addition 2
Individual severity is medium, and time-code formation source video file frame by frame is superimposed to 4 image sequences of selection；
Step 43：Video work station plays test source video signal, by the source of 4 different severities designed by step 42
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 44：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate is set according to practical application request；
Step 45：Make decoder normal work in decoded state, and code multiplexing Liu Zhongge roads video is carried out successively
Real-time decoding；
Step 46：Decoding video and corresponding source video are supervised simultaneously with digital waveform oscillograph, by conversation structure
Time-code, the encoding and decoding for calculating each road video are always delayed, as final testing result；
Each road coding and decoding video of statistical-multiplexing encoding appraisal procedure that is always delayed is：If each road of statistical-multiplexing encoding regards
The maximum that the encoding and decoding of each road video obtained by the total time-delay test method of frequency encoding and decoding are always delayed is not more than a certain threshold value, then
Needed it is believed that the total delay test result of each road coding and decoding video of the statistical-multiplexing encoding system (or equipment) meets practical application
Ask.
In the present embodiment, the method for testing of the statistical-multiplexing encoding audio frequency and video relative time delay is：
Step 51：As shown in fig. 6, it is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), regarding sound
Frequency decoder and digital waveform oscillograph；
Step 52：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》The middle test image sequence for choosing 3 different severities, wherein 1 severity is higher, 2 severities are medium in addition, then
Design one meets GB/T 22150-2008《The relative timing of television broadcasting sound and image》The test signal of testing requirement,
Form 4 road source signals；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》The middle test image sequence for choosing 3 different severities, wherein 1 severity is higher, 2 severities are medium in addition, then
Design one meets GB/T 22150-2008《The relative timing of television broadcasting sound and image》The test signal of testing requirement,
Form 4 road source signals；
Step 53：Video work station plays test source video signal, by the source of 4 different severities designed by step 52
Signal progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 54：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate is set according to practical application request；
Step 55：Make video-audio decoder normal work in decoded state, and code multiplexing Liu Zhongge roads are regarded successively
Audio carries out real-time decoding；
Step 56：The audio frequency and video relative time delay of each road signal is measured simultaneously with digital waveform oscillograph, as final test
As a result；
The appraisal procedure of the statistical-multiplexing encoding audio frequency and video relative time delay is：If statistical-multiplexing encoding audio frequency and video are relative
Audio frequency and video relative time delay obtained by time-delay test method is in a certain threshold range, then it is believed that the statistical-multiplexing encoding system
The audio frequency and video relative time delay test result of (or equipment) meets practical application request.
In the present embodiment, the method for testing of the statistical-multiplexing encoding transmitting stream index is：
Step 61：As shown in fig. 7, it is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment) and code
Flow point analyzer；
Step 62：Design test source video signal；
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
Step 63：Video work station plays test source video signal, by the source of 4 different severities designed by step 62
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 64：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate is set according to practical application request；
Step 65：Code stream analysis is used with tested statistical-multiplexing encoding system (or equipment) exports coding multiplex stream
4 program streams are analyzed respectively, and analysis indexes include transmitting stream standard compliance, the PCR shakes of each program, PCR repetitions
Interval, pat table recurrence interval, pmt table recurrence interval and PTS recurrence intervals, and to the V1.2.1 standards of ETSI TR 101 290
Defined in the mistake relevant with encoder be monitored, the duration be 15 minutes；
The appraisal procedure of the statistical-multiplexing encoding transmitting stream index is：If statistical-multiplexing encoding transmitting stream index test
The PCR shakes of transmitting stream standard compliance, each program obtained by method, PCR recurrence intervals, pat table recurrence interval, PMT
Table recurrence interval and PTS recurrence intervals meet GB/T 17975.1-2010《Information technology moving image and its sound information it is logical
With coding part 1：System》Requirement, and the V1.2.1 monitoring results of ETSI TR 101 290 have no mistake, then it is believed that should
The transmitting stream index test result of statistical-multiplexing encoding system (or equipment) meets practical application request.
In the present embodiment, the statistical-multiplexing encoding video-frequency basic flow standard compliance testing method is：
Step 71：As shown in figure 8, it is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), code stream
Analyzer and basic flow analyzer；
Step 72：Design test source video signal：
For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment is tested
Image》It is middle choose 4 different severities test image sequence as source video signal, wherein 1 severity is higher, 1 it is severe
Scale is relatively low, and 2 severities are medium in addition；
Step 73：Video work station plays test source video signal, by the source of 4 different severities designed by step 72
Video progress is randomly ordered, is played by video work station, is exported by 4 delivery outlets；
Step 74：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel
Coding average bit rate, maximal rate and minimum code rate are set according to practical application request；
Step 75：Code multiplexing stream is recorded using Transport Stream Analyzer, duration is recorded and is not less than source video duration；
Step 76：Transmission stream file Zhong Ge roads video-frequency basic flow is recorded to step 75 with basic flow analyzer and carries out standard
Accordance is analyzed；
The statistical-multiplexing encoding video-frequency basic flow standard compliance appraisal procedure is：If statistical-multiplexing encoding video base
Basic flow standard compliance result obtained by this flow standard compliance testing method meets the requirement of associated video coding standard,
Then it is believed that the basic flow Standard conformance test result of the statistical-multiplexing encoding system (or equipment) meets practical application request.
A kind of test and evaluation method for statistical-multiplexing encoding performance of the present invention, measure statistical multiplexing it can compile comprehensively
Code performance
A kind of test and evaluation method for statistical-multiplexing encoding image averaging quality of the present invention, designs exclusive survey
Examination source, it can effectively reflect statistical-multiplexing encoding performance.Wherein：The test and evaluation of statistical-multiplexing encoding picture quality equilibrium degree
Method, with cbr (constant bit rate) coding quality versus, can effectively measure statistical be multiplexed it is whether effective；Statistical-multiplexing encoding video codes
The test and evaluation method of rate fluctuation, different measurement parameters is used according to different links, not only reliable but also practical；Statistic multiplexing
The test and evaluation method that each road coding and decoding video is always delayed is encoded, exclusive test source is designed, can truly reflect practical application
The encoding and decoding delay of situation；The test and evaluation method of statistical-multiplexing encoding audio frequency and video relative time delay, designs exclusive test source,
The audio frequency and video relative time delay of practical situations can truly be reflected；The test and evaluation side of statistical-multiplexing encoding transmitting stream index
Method, transmitting stream index that can comprehensively in measure statistical multiplexing and encoding code stream；Statistical-multiplexing encoding video-frequency basic flow standard meets
The test and evaluation method of property, video-frequency basic flow index that can comprehensively in measure statistical multiplexing and encoding code stream.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (8)
- A kind of 1. statistical-multiplexing encoding performance test and evaluation method, it is characterised in that including the test comprising 7 indexs and comment Estimate, respectively statistical-multiplexing encoding image averaging quality, statistical-multiplexing encoding picture quality equilibrium degree, statistical-multiplexing encoding video Code check fluctuation, each road coding and decoding video of statistical-multiplexing encoding are always delayed, statistical-multiplexing encoding audio frequency and video relative time delay, statistic multiplexing Encode transmitting stream index, statistical-multiplexing encoding video-frequency basic flow standard compliance.
- A kind of 2. statistical-multiplexing encoding performance test and evaluation method as claimed in claim 1, it is characterised in that the statistics The method of testing of multiplexing and encoding image averaging quality is：Step 11：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), Video Decoder and image matter Measure subjective assessment system；Step 12：Design test source video signal：For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities is as source video signal, wherein 1 severity is higher, 1 harshness Spend relatively low, 2 severities are medium in addition；For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities is as source video signal, wherein 1 severity is higher, 1 harshness Spend relatively low, 2 severities are medium in addition；Step 13：Video work station plays test source video signal, by the source video of 4 different severities designed by step 12 Carry out randomly ordered, played by video work station, exported by 4 delivery outlets；Step 14：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel coding Average bit rate is set according to practical application request；Step 15：Make decoder normal work in decoded state；Step 16：With picture quality subjective assessment system respectively to 1~source video signal of source video signal 4, decoding video 1~solution Code video 4 is acquired；Step 17：Using GY/T 134《Digital TV image quality subjective evaluation method》In double stimulation continuous mass scale masters See the video that evaluation method is gathered to step 16 and carry out subjective assessment, evaluate the image matter of source video and decoding video respectively Amount, and image quality decrease percentage of the decoding video relative to source video is calculated, obtain the image quality decrease hundred of 4 sequences Divide ratio, as final testing result；The appraisal procedure of the statistical-multiplexing encoding image averaging quality is：It is right under statistical-multiplexing encoding practical application code check 4 image quality decrease percentages obtained by test, if 3 numerical value less than a certain threshold value (are assumed to be threshold value 1), the 4th numerical value is less than another larger threshold value (being assumed to be threshold value 2), then (or sets it is believed that the statistical-multiplexing encoding system It is standby) image averaging quality test results meet application demand.
- A kind of 3. statistical-multiplexing encoding performance test and evaluation method as claimed in claim 1, it is characterised in that the statistics The method of testing of multiplexing and encoding picture quality equilibrium degree is：Step 21：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), Video Decoder and image matter Measure analyzer；Step 22：Design test source video signal：For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities is as source video signal, wherein 1 severity is higher, 1 harshness Spend relatively low, 2 severities are medium in addition；For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities is as source video signal, wherein 1 severity is higher, 1 harshness Spend relatively low, 2 severities are medium in addition；Step 23：Video work station plays test source video signal, by the source video of 4 different severities designed by step 22 Carry out randomly ordered, played by video work station, exported by 4 delivery outlets；Step 24：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel coding Average bit rate is set according to practical application request；Step 25：Make decoder normal work in decoded state；Step 26：With image quality analysis instrument respectively to 1~source video signal of source video signal 4,1~decoding video of decoding video 4 are acquired；Step 27：The video gathered using image quality analysis instrument to step 26 carries out image quality analysis, and analysis indexes can To be PQR (or SSIM), the PQR of 4 sequences is obtainedstat(or SSIMstat), and calculate this 4 PQRstat(or SSIMstat) Average value and mean square deviation；Step 28：It is sequentially connected video work station, reference encoder device, Video Decoder and image quality analysis instrument；Step 29：Video work station plays test source video signal, by the source video of 4 different severities designed by step 22 Carry out randomly ordered, played by video work station, exported by 4 delivery outlets；Step 210：Make reference encoder device normal work in cbr (constant bit rate) encoding state, single channel coding average bit rate and step 4 phase Together；Step 211：Make decoder normal work in decoded state；Step 212：1~source video signal of source video signal 4, decoding video 1~decoding are regarded respectively with image quality analysis instrument Frequently 4 it is acquired；Step 213：The video gathered using image quality analysis instrument to step 212 carries out image quality analysis, analysis indexes Should (PQR or SSIM) identical with step 7, obtain the PQR of 4 sequencesCBR(or SSIMCBR), and calculate this 4 PQRCBR(or SSIMCBR) average value and mean square deviation；Step 214：Final testing result is used as using the average value obtained by step 27 and step 213 and mean square deviation；The appraisal procedure of the statistical-multiplexing encoding picture quality equilibrium degree is：In statistical-multiplexing encoding practical application code check Under, the PQR obtained by method of testing step 27statMean square deviation (or SSIMstatMean square deviation) compared to obtained by method of testing step 213 PQRCBRMean square deviation (or SSIMCBRMean square deviation) reduce a certain ratio, then (or set it is believed that the statistical-multiplexing encoding system It is standby) picture quality equilibrium degree test result meet practical application request.
- A kind of 4. statistical-multiplexing encoding performance test and evaluation method as claimed in claim 1, it is characterised in that the statistics Multiplexing and encoding video code rate fluctuation method of testing be：Step 31：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), Transport Stream Analyzer and code check point Analyzer；Step 32：Design test source video signal：For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities is as source video signal, wherein 1 severity is higher, 1 harshness Spend relatively low, 2 severities are medium in addition；For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities is as source video signal, wherein 1 severity is higher, 1 harshness Spend relatively low, 2 severities are medium in addition；Step 33：Video work station plays test source video signal, by the source video of 4 different severities designed by step 32 Carry out randomly ordered, played by video work station, exported by 4 delivery outlets；Step 34：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel coding Average bit rate, maximal rate and minimum code rate are set according to practical application request；Step 35：Code multiplexing stream is recorded using Transport Stream Analyzer, duration is recorded and is not less than source video duration；Step 36：The code check statistical window for setting code check analyzer is 20ms, and window move mode slides for 20ms, to step 35 Record transmission stream file and carry out code check analysis, obtain four road video total bitrates；Step 37：The code check statistical window for setting code check analyzer is 1000ms, and window move mode slides for 20ms, to step The 35 each road videos for recording transmission stream file carry out single channel video code rate statistical analysis one by one, obtain 4 groups of single channel video code rate ripples Moving curve；Step 38：With 4 groups of single channel video code rate ripples obtained by the four road video total bitrate values and step 37 obtained by step 36 Moving curve is as final testing result；The appraisal procedure of statistical-multiplexing encoding video code rate fluctuation is：Under statistical-multiplexing encoding practical application code check, such as Four road video total bitrate values obtained by fruit method of testing step 36 are not more than a certain threshold value (being assumed to be threshold value 1), and step 37 Resulting single channel video code rate fluctuation maximum is not more than a certain threshold value (being assumed to be threshold value 2), and single channel video code rate fluctuates most Small value is not less than a certain threshold value (being assumed to be threshold value 3), then it is believed that the video code rate of the statistical-multiplexing encoding system (or equipment) Wave testing result meets practical application request.
- A kind of 5. statistical-multiplexing encoding performance test and evaluation method as claimed in claim 1, it is characterised in that the statistics Each total time-delay test method of road coding and decoding video of multiplexing and encoding is：Step 41：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), Video Decoder and digital wave Kymographion；Step 42：Design test source video signal：For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities, wherein 1 severity is higher, 1 severity is relatively low, 2 in addition Severity is medium, and time-code formation source video file frame by frame is superimposed to 4 image sequences of selection；For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities, wherein 1 severity is higher, 1 severity is relatively low, 2 in addition Severity is medium, and time-code formation source video file frame by frame is superimposed to 4 image sequences of selection；Step 43：Video work station plays test source video signal, by the source video of 4 different severities designed by step 42 Carry out randomly ordered, played by video work station, exported by 4 delivery outlets；Step 44：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel coding Average bit rate is set according to practical application request；Step 45：Make decoder normal work in decoded state, and code multiplexing Liu Zhongge roads video is carried out successively real-time Decoding；Step 46：With digital waveform oscillograph simultaneously supervise decoding video and corresponding source video, by conversation structure when Code, the encoding and decoding for calculating each road video are always delayed, as final testing result；Each road coding and decoding video of statistical-multiplexing encoding appraisal procedure that is always delayed is：If each road video of statistical-multiplexing encoding is compiled Decode the maximum that the encoding and decoding of each road video obtained by total time-delay test method are always delayed and be not more than a certain threshold value, then can recognize Meet practical application request for the total delay test result of each road coding and decoding video of the statistical-multiplexing encoding system (or equipment).
- A kind of 6. statistical-multiplexing encoding performance test and evaluation method as claimed in claim 1, it is characterised in that the statistics The method of testing of multiplexing and encoding audio frequency and video relative time delay is：Step 51：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), video-audio decoder and numeral Kymographion；Step 52：Design test source video signal：For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 3 different severities, wherein 1 severity is higher, 2 severities are medium in addition, then set Meter one meets GB/T 22150-2008《The relative timing of television broadcasting sound and image》The test signal of testing requirement, group Into 4 road source signals；For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 3 different severities, wherein 1 severity is higher, 2 severities are medium in addition, then set Meter one meets GB/T 22150-2008《The relative timing of television broadcasting sound and image》The test signal of testing requirement, group Into 4 road source signals；Step 53：Video work station plays test source video signal, by the source signal of 4 different severities designed by step 52 Carry out randomly ordered, played by video work station, exported by 4 delivery outlets；Step 54：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel coding Average bit rate is set according to practical application request；Step 55：Make video-audio decoder normal work in decoded state, and successively to code multiplexing Liu Zhongge roads video and audio Carry out real-time decoding；Step 56：The audio frequency and video relative time delay of each road signal is measured simultaneously with digital waveform oscillograph, as final testing result；The appraisal procedure of the statistical-multiplexing encoding audio frequency and video relative time delay is：If statistical-multiplexing encoding audio frequency and video relative time delay Audio frequency and video relative time delay obtained by method of testing in a certain threshold range, then it is believed that the statistical-multiplexing encoding system (or Equipment) audio frequency and video relative time delay test result meet practical application request.
- A kind of 7. statistical-multiplexing encoding performance test and evaluation method as claimed in claim 1, it is characterised in that the statistics The method of testing of multiplexing and encoding transmitting stream index is：Step 61：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment) and Transport Stream Analyzer；Step 62：Design test source video signal；For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities is as source video signal, wherein 1 severity is higher, 1 harshness Spend relatively low, 2 severities are medium in addition；For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities is as source video signal, wherein 1 severity is higher, 1 harshness Spend relatively low, 2 severities are medium in addition；Step 63：Video work station plays test source video signal, by the source video of 4 different severities designed by step 62 Carry out randomly ordered, played by video work station, exported by 4 delivery outlets；Step 64：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel coding Average bit rate is set according to practical application request；Step 65：Code stream analysis is used with to 4 be tested in statistical-multiplexing encoding system (or equipment) exports coding multiplex stream Program stream is analyzed respectively, and analysis indexes are included between transmitting stream standard compliance, the PCR shakes of each program, PCR repetitions Every, pat table recurrence interval, pmt table recurrence interval and PTS recurrence intervals, and in the V1.2.1 standards of ETSI TR 101 290 The mistake relevant with encoder of definition is monitored, and the duration is 15 minutes；The appraisal procedure of the statistical-multiplexing encoding transmitting stream index is：If statistical-multiplexing encoding transmitting stream indication test method Resulting transmitting stream standard compliance, the PCR shakes of each program, PCR recurrence intervals, pat table recurrence interval, pmt table weight Multiple interval and PTS recurrence intervals meet GB/T 17975.1-2010《The general volume of information technology moving image and its sound information Code part 1：System》Requirement, and the V1.2.1 monitoring results of ETSI TR 101 290 have no mistake, then it is believed that the statistics The transmitting stream index test result of multiplexing and encoding system (or equipment) meets practical application request.
- A kind of 8. statistical-multiplexing encoding performance test and evaluation method as claimed in claim 1, it is characterised in that the statistics Multiplexing and encoding video-frequency basic flow standard compliance testing method is：Step 71：It is sequentially connected video work station, tested statistical-multiplexing encoding system (or equipment), Transport Stream Analyzer and basic flow Analyzer；Step 72：Design test source video signal：For high definition statistical-multiplexing encoding, from GB/T 31001-2014《High definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities is as source video signal, wherein 1 severity is higher, 1 harshness Spend relatively low, 2 severities are medium in addition；For SD statistical-multiplexing encoding, from GY/T 228-2007《Single-definition digital television subjective assessment test chart Picture》The middle test image sequence for choosing 4 different severities is as source video signal, wherein 1 severity is higher, 1 harshness Spend relatively low, 2 severities are medium in addition；Step 73：Video work station plays test source video signal, by the source video of 4 different severities designed by step 72 Carry out randomly ordered, played by video work station, exported by 4 delivery outlets；Step 74：Make tested statistical-multiplexing encoding system (or equipment) normal work in statistical-multiplexing encoding state, single channel coding Average bit rate, maximal rate and minimum code rate are set according to practical application request；Step 75：Code multiplexing stream is recorded using Transport Stream Analyzer, duration is recorded and is not less than source video duration；Step 76：Transmission stream file Zhong Ge roads video-frequency basic flow is recorded to step 75 with basic flow analyzer carry out standard and meet Property analysis；The statistical-multiplexing encoding video-frequency basic flow standard compliance appraisal procedure is：If statistical-multiplexing encoding video-frequency basic flow Basic flow standard compliance result obtained by standard compliance testing method meets the requirement of associated video coding standard, then may be used Think that the basic flow Standard conformance test result of the statistical-multiplexing encoding system (or equipment) meets practical application request.
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| CN110740313A (en) * | 2019-10-25 | 2020-01-31 | 腾讯科技（深圳）有限公司 | Hardware coding capability detection method and device |
| CN113784131A (en) * | 2021-08-20 | 2021-12-10 | 杭州当虹科技股份有限公司 | Video coding automation auxiliary system and method |
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