CN108737832A - A kind of video artefacts detecting system and its method based on Video Decoder - Google Patents
A kind of video artefacts detecting system and its method based on Video Decoder Download PDFInfo
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- CN108737832A CN108737832A CN201810523056.3A CN201810523056A CN108737832A CN 108737832 A CN108737832 A CN 108737832A CN 201810523056 A CN201810523056 A CN 201810523056A CN 108737832 A CN108737832 A CN 108737832A
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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
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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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
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
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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
- H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
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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 present invention discloses a kind of video artefacts detecting system based on Video Decoder, including video reception module, Video decoding module, grammer detection module and defect analysis module, video reception module is connect with Video decoding module, and Video decoding module is connect by grammer detection module with defect analysis module；Grammer detection module carries out Semantic detection to decoded macro block video file；Defect analysis module carries out flower screen defect inspection to macro block video file in macro block video file set, and the flower screen defect inspection result of video is exported.Video artefacts detecting system and its method provided by the invention based on Video Decoder, by the way that decoded video file is detected and analyzed through grammer detection module and defect analysis module, to remove the video file of syntax error, and flower screen detection is carried out to the video file of no syntax error, it can be effectively improved the precision and detection efficiency of video flower screen detection, meet the requirement of the picture play quality of video.
Description
Technical field
The invention belongs to Video Decoder fields, are related to a kind of video artefacts detection system based on Video Decoder
System and its method.
Background technology
Video Decoder, which refers to one, can compress digital video the program or equipment either decompressed.Decoding
The presence of device is because audio-visual data storage will first pass through compression, and otherwise data volume is too huge, and compresses and need by one
Fixed coding could store the highest audio-visual data of quality with minimum capacity therefore need to broadcast data
To first pass through decoder when putting and be decoded can have AC-3, HDCD, DTS etc. with decoded digital encoding format.
Before video frequency program is reached the standard grade, it is an important link, video film source quality to be detected to video film source quality
Detection include to black field, the detection for the defects of frozen frame, image be fuzzy, Hua Ping, mute, slicing, VU exceeded, wherein to video text
The detection of part flower screen defect is the most difficult, and flower screen defect is also one of the defect of the deterioration video quality of most serious.
Video representation with flower screen defect is the continuous color lump for occurring in video file bulk.Cause video literary
Part occurs that the reason of shielding defect is spent usually to have both sides：On the one hand it is since data of the video file in transmission or storage are lost
Caused by mistake；On the other hand it is the code error or caused by excess compression in compression encoding process due to video.
Video Decoder can not carry out the video file after decompression flower screen detection at present, lead to decoded video file
In playing process, there are Huaping phenomenons, seriously affect the effect of video playing, in addition, existing spend screen defect to video file
Detection be all based on decoded image data Y, U, V (or R, G, B) and carry out analyzing processing, method mainly has：
(1) decoded front and back frame image data is compared, difference thinks there is flower screen when being more than a threshold value
Defect, when for there is scene changes or when continuous flower screen occurs, the accuracy of this method detection flower screen is with regard to poor.
(2) it is based on the detection method of pattern match and support vector machines (SVM) algorithm, although the essence of detection flower screen can be improved
Degree, but the method calculates complexity, is not suitable for being applied to actually detected scene.
(3) edge image first is detected to entire image application edge detection operator, then edge image is analyzed, examined
It surveys and whether there is rectangle frame, then think there is flower screen defect, this method there are operands larger, Hua Ping if there is rectangle frame
Accuracy of detection is low, problem that detection efficiency is low.
Invention content
The purpose of the present invention is to provide a kind of video artefacts detecting system and its method based on Video Decoder solve
Existing video flower screen detection process, has that complexity is big, accuracy of detection is low low with efficiency.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of video artefacts detecting system based on Video Decoder, including video reception module, Video decoding module, language
Method detection module and defect analysis module, video reception module are connect with Video decoding module, and Video decoding module passes through grammer
Detection module is connect with defect analysis module；
The video file of reception is sent to video by the video reception module for receiving the video file that need to be detected
Decoder module；
By the sequencing of the video file received, a frame frame decoding video file obtains several the Video decoding module
Frame video file, and frame video file is obtained into macro block video text according to the sequence decoding frame video file of one macro block of a macro block
Part, and decoded macro block video file is sent to grammer detection module；
The grammer detection module is used to receive the decoded macro block video file of Video decoding module transmission, to receiving
Macro block video file carry out Semantic detection take aik if syntax error occurs in k-th of macro block in i-th of frame video file
=0, if k-th of macro block in i-th of frame video file does not occur syntax error, aik=a ' ik are taken, new macro block is obtained and regards
Frequency file set a ' i (ai1, ai2 ..., aik ..., aim), and the macro block video in new macro block video file set is literary
Part is sent to defect analysis module, wherein a ' ik are expressed as k-th of macro block in new macro block video file set；
Macro block video text of the defect analysis module to aik in the new macro block video file set of reception not equal to 0
Part carries out flower screen defect inspection, and the flower screen defect inspection result of video is exported；
Wherein, the defect analysis module to aik in the new macro block video file set of reception not equal to 0 macro block into
Row block internal standard difference calculates, and obtains macro block standard difference set D (d1, d2 ..., dk ..., dm), and analyze and k-th of macro block phase
The boundary standard difference dw of adjacent macro block, standard deviation DD between the block of the macro block is calculated according to boundary standard difference,
Wherein, dw1 be expressed as k-th of macro block macro block adjacent with wherein one boundary standard it is poor, dw2 be expressed as k-th macro block with it is another
The boundary standard of one adjacent macro block is poor；
Between macro block standard deviation is less than block when standard deviation, indicate that the macro block does not occur flower screen defect, if the macro block standard deviation
Shield defect more than when standard deviation, showing that spending occurs in the macro block between block.
Further, after video file is decoded, decoded video file is divided as unit of frame, is divided
For several frame video files, configuration frame video file set A (a1, a2 ..., ai ..., an), wherein A is expressed as needing to solve
The video file of code, ai are expressed as i-th of frame video file；
The frame video file, decoded video are decoded by the sequence of one macro block of a macro block to ai in frame video file set
File constitutes macro block video file set ai (ai1, ai2 ..., aik ..., aim), wherein aik is expressed as i-th of frame and regards
K-th of macro block in frequency file.
Further, the grammer detection module according to macro block video file sequence, successively to macro block video clip
Macro block in conjunction carries out grammer detection, judges whether syntax error.
Further, the syntax error include in macro block video file set a macro block sweared with the presence or absence of invalid movement
In the long code value of quantitative change, macro block video file set a macro quantization parameter in the block whether cross the border or macro block video file set in one
Cross the border with the presence or absence of DCT coefficient in macro block, number not.
Further, described piece of internal standard difference calculation formula is dk=Mk*f(x,y)+Nk* f (x, y), dk are expressed as k-th
The corresponding standard deviation of macro block, f (x, y) are the luminance y value or coloration U, V value of pixel (x, y) point, and Mk is the width of k-th of macro block, Nk
For the height of k-th of macro block；
The boundary standard difference dw of the adjacent macro block of the macro block, using formula dw=H- (f (i)-fU (i)), wherein dw is indicated
Poor for the boundary standard adjacent with k-th of macro block, H is the boundary length of the macro block and the public boundary of adjacent macroblocks, i.e., public
Total pixel on boundary altogether, f (i) are the luminance y value or coloration U, V value of macroblock boundaries i points, and fU (i) is adjacent with the macro block
Macro block boundary i points luminance y value or coloration U, V value.
A kind of video artefacts detection method based on Video Decoder, includes the following steps：
The video file that S1, reception need to detect, is decoded the video file of reception, obtains frame video file；
S2, several macro block video files are divided into the decoding of frame video file successively；
S3, grammer detection module judge the semanteme of each macro block in macro block video file, if language occurs in k-th of macro block
Method mistake, then take aik=0, if k-th of macro block does not occur syntax error, takes aik=a ' ik, obtains new macro block video text
Part set；
S4, new macro block video file is sent to defect analysis module；
S5, defect analysis module carry out macro block standard deviation calculating to the macro block in new macro block video file, and count successively
The boundary standard for calculating the adjacent macro block of the macro block is poor, and standard deviation between the block of the macro block is calculated according to the boundary standard difference of macro block；
The size of S6, the standard deviation for judging the macro block and the boundary standard difference of the macro block, if the macro block standard deviation is less than block
Between standard deviation when, indicate the macro block do not occur flower screen defect, if the macro block standard deviation be more than block between standard deviation when, show the macro block
There is flower screen defect；
S7, judge whether the decoded macro block video file of a certain video file received detects completion；
If S8, detection are completed, the macro block for flower screen defect occur is exported, step S3 is otherwise carried out.
Beneficial effects of the present invention：
Video artefacts detecting system and its method provided by the invention based on Video Decoder, by being regarded decoded
Frequency file is detected and analyzed through grammer detection module and defect analysis module, to remove the video file of syntax error, and
Flower screen detection is carried out to the video file of no syntax error, the precision and detection that can be effectively improved video flower screen detection are imitated
Rate, at the same have the characteristics that it is easy to operate, have a wide range of application, meet the requirement of the picture play quality of video.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of schematic diagram of the video artefacts detecting system based on Video Decoder of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Refering to Figure 1, the present invention is a kind of video artefacts detecting system based on Video Decoder, including video connects
Module, Video decoding module, grammer detection module and defect analysis module are received, video reception module connects with Video decoding module
It connects, Video decoding module is connect by grammer detection module with defect analysis module；
Video reception module is sent to video decoding for receiving the video file that need to be detected, and by the video file of reception
Module；
Video decoding module is according to the sequencing of the video file of reception, several frames of frame frame decoding video file acquisition
Video file, and frame video file is obtained into macro block video file according to the sequence decoding frame video file of one macro block of a macro block,
And decoded macro block video file is sent to grammer detection module, after the completion of the decoding of a certain video file, then to next
Video file is decoded；
After one video file is decoded, decoded video file is divided as unit of frame, if being divided into
Dry frame video file, configuration frame video file set A (a1, a2 ..., ai ..., an), wherein A is expressed as needing decoded
Video file, ai are expressed as i-th of frame video file；
The frame video file, decoded video are decoded by the sequence of one macro block of a macro block to ai in frame video file set
File constitutes macro block video file set ai (ai1, ai2 ..., aik ..., aim), wherein aik is expressed as i-th of frame and regards
K-th of macro block in frequency file；
Grammer detection module is used to receive the decoded macro block video file of Video decoding module transmission, to the macro of reception
Block video file carries out Semantic detection, obtains new macro block video file set, and will be in new macro block video file set
Macro block video file is sent to defect analysis module；The grammer detection module according to macro block video file sequence, it is right successively
Macro block in macro block video file set carries out grammer detection, judges whether that syntax error, the syntax error include macro
A macro block is with the presence or absence of a macro block in the invalid elongated code value of motion vector, macro block video file set in block video file set
In quantization parameter whether cross the border or macro block video file set in cross the border with the presence or absence of DCT coefficient in a macro block, number not
Match；
If syntax error occurs in k-th of macro block in i-th of frame video file, aik=0 is taken, if i-th of frame video text
K-th of macro block in part does not occur syntax error, then takes aik=a ' ik, obtain new macro block video file set a ' i (ai1,
Ai2 ..., aik ..., aim), and the macro block video file in new macro block video file set is sent to defect analysis mould
Block, wherein a ' ik are expressed as k-th of macro block in new macro block video file set；
Defect analysis module to aik in the new macro block video file set of reception not equal to 0 macro block video file into
Row flower screen defect inspection, and the flower screen defect inspection result of video is exported.
Macro block of the defect analysis module to aik in the new macro block video file set of reception not equal to 0 is into row block
Internal standard difference calculates, and obtains macro block standard difference set D (d1, d2 ..., dk ..., dm), wherein dk=Mk*f(x,y)+Nk*f
(x, y), dk are expressed as the corresponding standard deviation of k-th of macro block, and f (x, y) is the luminance y value or coloration U, V value of pixel (x, y) point,
Mk is the width of k-th of macro block, and Nk is the height of k-th of macro block；
Analysis it is poor with the boundary standard of k-th of macro block adjacent macroblocks, the formula used for dw=H- (f (i)-fU (i)),
In, dw is expressed as that the boundary standard adjacent with k-th of macro block is poor, and H is the boundary of the macro block and the public boundary of adjacent macroblocks
Length, i.e. total pixel of public boundary, f (i) are the luminance y value or coloration U, V value of macroblock boundaries i points, and fU (i) is and this
The luminance y value or coloration U, V value of the boundary i points of the adjacent macro block of macro block.
Standard deviation DD between the block of the macro block is calculated according to boundary standard difference,Wherein, dw1 is indicated
Boundary standard for k-th of macro block macro block adjacent with wherein one is poor, and dw2 is expressed as k-th of macro block and another adjacent macro block
Boundary standard it is poor.
Between macro block standard deviation is less than block when standard deviation, indicate that the macro block does not occur flower screen defect, if the macro block standard deviation
Shield defect more than when standard deviation, showing that spending occurs in the macro block between block, it can not computing macro block mark for there is the macro block of syntax error
It is accurate poor.
A kind of video artefacts detection method based on Video Decoder, includes the following steps：
The video file that S1, reception need to detect, is decoded the video file of reception, obtains frame video file；
S2, several macro block video files are divided into the decoding of frame video file successively；
S3, grammer detection module judge the semanteme of each macro block in macro block video file, if language occurs in k-th of macro block
Method mistake, then take aik=0, if k-th of macro block does not occur syntax error, takes aik=a ' ik, obtains new macro block video text
Part set；
S4, new macro block video file is sent to defect analysis module；
S5, defect analysis module carry out macro block standard deviation calculating to the macro block in new macro block video file, and count successively
The boundary standard for calculating the adjacent macro block of the macro block is poor, and standard deviation between the block of the macro block is calculated according to the boundary standard difference of macro block；
The size of S6, the standard deviation for judging the macro block and the boundary standard difference of the macro block, if the macro block standard deviation is less than block
Between standard deviation when, indicate the macro block do not occur flower screen defect, if the macro block standard deviation be more than block between standard deviation when, show the macro block
There is flower screen defect；
S7, judge whether the decoded macro block video file of a certain video file received detects completion；
If S8, detection are completed, the macro block for flower screen defect occur is exported, step S3 is otherwise carried out.
Video artefacts detecting system and its method provided by the invention based on Video Decoder, by being regarded decoded
Frequency file is detected and analyzed through grammer detection module and defect analysis module, to remove the video file of syntax error, and
Flower screen detection is carried out to the video file of no syntax error, the precision and detection that can be effectively improved video flower screen detection are imitated
Rate, at the same have the characteristics that it is easy to operate, have a wide range of application, meet the requirement of the picture play quality of video.
The above content is just an example and description of the concept of the present invention, affiliated those skilled in the art
It makes various modifications or additions to the described embodiments or substitutes by a similar method, without departing from invention
Design or beyond the scope defined by this claim, be within the scope of protection of the invention.
Claims (6)
1. a kind of video artefacts detecting system based on Video Decoder, it is characterised in that：Including video reception module, video solution
Code module, grammer detection module and defect analysis module, video reception module are connect with Video decoding module, Video decoding module
It is connect with defect analysis module by grammer detection module；
The video reception module is sent to video decoding for receiving the video file that need to be detected, and by the video file of reception
Module；
The Video decoding module presses the sequencing of the video file received, and a frame frame decoding video file obtains several frames and regards
Frequency file, and frame video file is obtained into macro block video file according to the sequence decoding frame video file of one macro block of a macro block, and
Decoded macro block video file is sent to grammer detection module；
The grammer detection module is used to receive the decoded macro block video file of Video decoding module transmission, to the macro of reception
Block video file carries out Semantic detection and takes aik=0 if syntax error occurs in k-th of macro block in i-th of frame video file,
If k-th of macro block in i-th of frame video file does not occur syntax error, aik=a ' ik are taken, obtain new macro block video text
Part set a ' i (ai1, ai2 ..., aik ..., aim), and the macro block video file in new macro block video file set is sent out
It send to defect analysis module, wherein a ' ik are expressed as k-th of macro block in new macro block video file set；
The defect analysis module to aik in the new macro block video file set of reception not equal to 0 macro block video file into
Row flower screen defect inspection, and the flower screen defect inspection result of video is exported；
Wherein, macro block of the defect analysis module to aik in the new macro block video file set of reception not equal to 0 is into row block
Internal standard difference calculates, and obtains macro block standard difference set D (d1, d2 ..., dk ..., dm), and analyze adjacent with k-th of macro block macro
The boundary standard difference dw of block, standard deviation DD between the block of the macro block is calculated according to boundary standard difference,Its
In, the boundary standard that dw1 is expressed as k-th of macro block macro block adjacent with wherein one is poor, dw2 be expressed as k-th of macro block with it is another
The boundary standard of adjacent macro block is poor；
Between macro block standard deviation is less than block when standard deviation, indicate that the macro block does not occur flower screen defect, if the macro block standard deviation is more than
Between block when standard deviation, show that flower screen defect occurs in the macro block.
2. a kind of video artefacts detecting system based on Video Decoder according to claim 1, it is characterised in that：Video
After file is decoded, decoded video file is divided as unit of frame, is divided into several frame video files, structure
Framing video file set A (a1, a2 ..., ai ..., an), wherein A is expressed as that decoded video file, ai is needed to be expressed as
I-th of frame video file；
The frame video file, decoded video text are decoded by the sequence of one macro block of a macro block to ai in frame video file set
Part constitutes macro block video file set ai (ai1, ai2 ..., aik ..., aim), wherein aik is expressed as i-th of frame video
K-th of macro block in file.
3. a kind of video artefacts detecting system based on Video Decoder according to claim 1, it is characterised in that：It is described
Grammer detection module carries out grammer inspection to the macro block in macro block video file set successively according to the sequence of macro block video file
It surveys, judges whether syntax error.
4. a kind of video artefacts detecting system based on Video Decoder according to claim 3, it is characterised in that：It is described
Syntax error include in macro block video file set a macro block with the presence or absence of the invalid elongated code value of motion vector, macro block video text
In part set a macro quantization parameter in the block whether cross the border or macro block video file set in whether there is DCT coefficient in a macro block
Cross the border, number not.
5. a kind of video artefacts detecting system based on Video Decoder according to claim 1, it is characterised in that：It is described
Block internal standard difference calculation formula is dk=Mk*f(x,y)+Nk* f (x, y), dk are expressed as the corresponding standard deviation of k-th of macro block, f (x,
Y) it is the luminance y value or coloration U, V value of pixel (x, y) point, Mk is the width of k-th of macro block, and Nk is the height of k-th of macro block；
The boundary standard difference dw of the adjacent macro block of the macro block, using formula dw=H- (f (i)-fU (i)), wherein dw be expressed as with
The adjacent boundary standard of k-th of macro block is poor, and H is the boundary length of the macro block and the public boundary of adjacent macroblocks, i.e. common edge
Total pixel on boundary, f (i) are the luminance y value or coloration U, V value of macroblock boundaries i points, and fU (i) is adjacent with the macro block macro
The luminance y value or coloration U, V value of the boundary i points of block.
6. a kind of video artefacts detection method based on Video Decoder, which is characterized in that include the following steps：
The video file that S1, reception need to detect, is decoded the video file of reception, obtains frame video file；
S2, several macro block video files are divided into the decoding of frame video file successively；
S3, grammer detection module judge the semanteme of each macro block in macro block video file, if grammer mistake occurs in k-th of macro block
Accidentally, then aik=0 is taken, if k-th of macro block does not occur syntax error, takes aik=a ' ik, obtains new macro block video clip
It closes；
S4, new macro block video file is sent to defect analysis module；
S5, defect analysis module carry out macro block standard deviation calculating successively to the macro block in new macro block video file, and calculating should
The boundary standard of the adjacent macro block of macro block is poor, and standard deviation between the block of the macro block is calculated according to the boundary standard difference of macro block；
The size of S6, the standard deviation for judging the macro block and the boundary standard difference of the macro block, if the macro block standard deviation is marked between being less than block
It when quasi- difference, indicates that the macro block does not occur flower screen defect, if the macro block standard deviation is more than standard deviation between block, shows that the macro block occurs
Flower screen defect；
S7, judge whether the decoded macro block video file of a certain video file received detects completion；
If S8, detection are completed, the macro block for flower screen defect occur is exported, step S3 is otherwise carried out.
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| CN104202611A (en) * | 2014-09-01 | 2014-12-10 | 赛特斯信息科技股份有限公司 | Method of realizing detection on broken screen defect in video file based on video decoder |
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