CN101540921A - Three-dimensional adaptive combined comb filtering system based on characteristic analysis - Google Patents
Three-dimensional adaptive combined comb filtering system based on characteristic analysis Download PDFInfo
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Abstract
The invention relates to a three-dimensional adaptive combined comb filtering system, which comprises an analog composite video signal line and field data delay module for the convenience of comb filtering processing, an analog composite video signal comb filtering and detection module of a spatial domain for providing reference signals for a three-dimensional comb filtering module, a video characteristic analysis module for providing three-dimensional chroma separation reference signals for three-dimensional comb filtering, a motion detection module on the basis of video characteristics for mapping the three-dimensional chroma separation measurement to the motion detection of the module, a video characteristic/motion quantity adaptive three-dimensional comb filtering module for filtering the brightness and the chroma to obtain a final bright color value, and a bright color degree component post-processing module for performing post processing on an obtained brightness component and performing demodulation and filtration on the chroma so as to finish the brightness and the chroma post processing based on the motion quantity. The three-dimensional adaptive combined comb filtering system not only can ensure the high-degree detail of motion images, but also can ensure the complete chroma separation of still images; besides, the system can perform convenient configuration.
Description
Technical field
The present invention relates to a kind of three-dimensional comb filtering system, especially the light tone string that runs in analog composite video signal (NTSC/PAL/PALM/PALNc) decode procedure in the consumer electronics video of having relatively high expectations for picture quality moves into the three-dimensional adaptive combined comb filtering system that row separates.
Background technology
Be superimposed upon on the luminance channel after traditional analog composite video signal is modulated chrominance information and propagate/broadcast, receiving terminal carries out light tone by processing such as filtering to be separated, and for example our present employed television receiver just is mainly used in the processing of carrying out this respect.In the past, the engineer utilizes analog signal processing method such as ceramic filter to carry out light tone to separate; In today of electronics and signal processing technology development, the digitized processing of image and video reaches its maturity, can adopt digitizing solution more effectively to realize for the design of analog composite video signal decoder, therefore the chip design based on the Analog Composite Video decoder of digital processing occurred, the core component in this composite video decoder is exactly to be used for the comb filter that light tone is separated.In general, the early stage of development is adopted the comb filter of one dimension or two dimension, for the coloured image of high details, even static situation is difficult to also accomplish that good light tone separates, light tone often occurs and goes here and there situation mutually.In recent years, three-dimensional comb filter occurs, and for the light tone of static vision signal is separated, thereby obtains the better pictures quality.But therefore also occur because the processing erroneous effects that three-dimensional comb filtering brings picture quality, for example, the grid noise that occurs in the sport video etc.In general, static video content can obtain the recovery of video true content better with the method for three-dimensional comb filtering; The result of two-dimensional comb filtering often can avoid mistakes such as grid noise when rapid movement/scene was switched; For the video scene that the high brightness details is moved slowly, adopt three-dimensional still two-dimensional comb filtering to be decided by which kind of filtering result is more stably near original video content.Therefore, the core of analog composite video signal three-dimensional decoder design becomes whether or how much using three-dimensional pectination or two-dimensional comb filtering result's judgement.
Whether existing composite analog video signal decoder mostly adopts according to video and move as the foundation that whether adopts three-dimensional comb filtering result: the vision signal of moving slowly for high details often causes losing of details and increases flicker noise like this; For the high color signal of rapid movement, be easy to generate irritating netted noise.Therefore had a strong impact on the picture quality effect of the decoded video of Analog Composite Video decoder.
And, current increasing processing system for video comprise the Digital Television receiving chip all integrated the Analog Composite Video decoder, the performance of its three-dimensional comb filter often determines the class and the market segmentation of entire product, and by television manufacturer as weighing chip quality and product price bargain chip.Therefore, the three-dimensional comb filter of designing high-performance and low-cost becomes the core of Analog Composite Video decoder and whole video decoding chip system.It's a pity that often all there is the problem of above-mentioned netted noise and sport video high frequency loss in detail in the Analog Composite Video decoder that is had in current market.
Summary of the invention
The objective of the invention is defective at three-dimensional comb filter in the existing analog composite video signal decoder, a kind of three-dimensional adaptive combined comb filtering system based on video time territory and space domain characteristic is provided, can recovers the original contents of analog composite video signal better and do not bring mistake.
A kind of three-dimensional adaptive combined comb filtering system of analog composite video signal feature comprises:
Capable and the field data Postponement module of analog composite video signal, postpone with the row/field/frame format of memory according to composite video signal, make the contiguous sampling point and the current sampling point of current sampling point have strict phase relation, for three-dimensional comb filtering provides the colourity phase modulation relation of analog composite video signal under different systems;
The analog composite video signal comb filtering and the detection module of spatial domain, the composite video signal that this module is capable to analog composite video signal and the field data Postponement module postponed is carried out the comb filtering on the space, obtain the degree of correlation correlation on the space, for three-dimensional comb filtering module provides effective reference signal;
The video features analysis module, provide spatially and the feature on the time-domain the video sampling point, whether carry out the reference signal that three-dimensional light tone is separated for three-dimensional comb filtering provides, the core feature of video features analysis module module is to give the motion monitoring module with the room and time Feature Mapping of video sampling point on the quantized components that can be used to calculate;
Based on video features self-adaptive motion amount detection module, can the tolerance that carry out three-dimensional light tone separation be mapped in the amount of exercise detection of this module, quantize more easily to calculate and handle, be that based on the characteristics of the motion detection block of video features image space and temporal quantization characteristic are reflected to amount of exercise as parameter to be calculated on the decay characteristics;
Video features/amount of exercise self-adaptation three-dimensional comb filtering module, when described video features analysis module is sent the reference signal of carrying out three-dimensional light tone separation, the colourity phase modulation relation of analog composite video signal under different systems capable according to described analog composite video signal and the field data Postponement module provides, carry out the filtering of brightness and colourity, and the degree of correlation correlation on the space that provides according to the analog composite video signal comb filtering module of described motion detection amount that obtains based on the motion detection block of video features and described spatial domain, carry out the judgement that various light tones are separated, obtain luminance component;
Based on the light tone degree component post-processing module of component motion, the luminance component that obtains is carried out reprocessing, can also separate mediation filtering to colourity, to finish based on momental brightness and colourity reprocessing.
Therefore, the present invention is based on the three-dimensional adaptive combined comb filtering system of signature analysis, feature according to the different video signal, definition is applicable to the quantization characteristic parameter that amount of exercise detects, employing is estimated and three-dimensional adaptive light tone separator based on the amount of exercise of fuzzy logic algorithm, the high-quality light tone that makes three-dimensional comb filtering can deal with the slow motion complex scene of high-bandwidth signals, rapid movement high color saturation signal and high degree of detail is separated, and the image stabilization of separation and ratio of defects are lower than existing traditional composite video decoder capabilities.Crucial more is that this invention can be accomplished the independent of the every index of three-dimensional adaptive comb filtering adjusted, and needn't do splitting the difference between some index.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the three-dimensional adaptive combined comb filtering system block diagram that the present invention is based on signature analysis.
Fig. 2 is the sampling point distribution map behind the delay line of vision signal row of the present invention field.
Fig. 3 is the internal structure block diagram that the present invention is based on the amount of exercise detection module of signature analysis.
Embodiment
Utilization of the present invention is adopted based on the amount of exercise of fuzzy logic and is judged that realization separates the optimization light tone of composite video with the three-dimensional adaptive comb filtering by the analysis to the analog composite video signal feature.The light tone string that runs in analog composite video signal (NTSC/PAL/PALM/PALNc) decode procedure in the consumer electronics video that the present invention has relatively high expectations for picture quality moves into row effectively to be separated, both can guarantee the high degree of detail of moving image, the complete light tone that can guarantee rest image is again separated, and can make things convenient for the three-dimensional comb filter method of configuration, be specially adapted to the high-quality colour decoder in the equipment such as television receiver, surveillance equipment.
As shown in Figure 1, three-dimensional adaptive combined comb filtering system comprises the capable and field data deferred mount 1 of analog composite video signal according to an embodiment of the invention; The analog composite video signal comb filtering of spatial domain and checkout gear 2 are connected with data delay device 1; Video features analysis module 3; Based on the motion detection block 4 of video features, be connected with described video features analysis module 3; Adaptive video feature/amount of exercise self-adaptation three-dimensional comb filtering module 5 is connected with the analog composite video signal comb filtering of described spatial domain and checkout gear 2 and based on the motion detection block 4 of video features; Based on the light tone degree component post-processing module 6 of component motion, determine the self adaptation component of reprocessing according to the information that motion detection block 4 and video features analysis module 3 based on video features provide, thereby isolate clean stable brightness and chromatic component.
Capable and the field data Postponement module 1 of analog composite video signal, postpone with the field frame format of memory according to composite video signal, make the contiguous sampling point and the current sampling point of current sampling point have strict phase relation, for three-dimensional comb filtering provides the colourity phase modulation relation of analog composite video signal under different systems.The analog composite video signal comb filtering of spatial domain and detection module 2, the composite video signal that this module is capable to analog composite video signal and the field data Postponement module postponed is carried out the comb filtering on the space, obtain the degree of correlation correlation on the space, for three-dimensional comb filtering module provides effective reference signal.The analog composite video signal comb filtering module 2 of this spatial domain can be regarded a general functional module as, does not have the frame stored video data to participate in.Video features analysis module 3, provide spatially and the feature on the time-domain the video sampling point, whether carry out the reference signal that three-dimensional light tone is separated for three-dimensional comb filtering provides, the core feature of this module is to give the motion monitoring module with the room and time Feature Mapping of video sampling point on the quantized components that can be used to calculate.Based on the motion detection block 4 of video features, can the tolerance that carry out three-dimensional light tone separation be mapped in the amount of exercise detection of this module, quantizes more easily to calculate and handle, and obtains the motion detection amount.The characteristics of this module are image space and temporal quantization characteristic are reflected on the amount of exercise calculating decay characteristics as parameter.Video features/amount of exercise self-adaptation three-dimensional comb filtering module 5, when described video features analysis module is sent the reference signal of carrying out three-dimensional light tone separation, the colourity phase modulation relation of analog composite video signal under different systems capable according to described analog composite video signal and the field data Postponement module provides, carry out the filtering of brightness and colourity, and the degree of correlation correlation on the space that provides according to the analog composite video signal comb filtering module of described motion detection amount that obtains based on the motion detection block of video features and described spatial domain, carry out the judgement that various light tones are separated, obtain luminance component.Based on the light tone degree component post-processing module 6 of component motion, the luminance component that obtains is carried out reprocessing, can also separate mediation filtering to colourity, finish based on momental brightness and colourity reprocessing.
Capable and the field data Postponement module 1 of analog composite video signal comprises the basic handling submodule, and the basic handling (preliminary filtering) to the Analog Composite Video sampled signal as shown in Figure 2, for example is divided into composite video high and low frequency two parts.Capable and the field data Postponement module of analog composite video signal can also comprise that synchronizing signal arranges submodule, the synchronizing signal that provides according to the synchronizer of outside is arranged in the alignment thereof that subsequent module is wished with sampled point: current some signal indication when the front court is C (n), the adjacent row signal is expressed as C_u2 (n) respectively in the present frame, C_u1 (n), C_d1 (n), C_d2 (n), the data of the corresponding current line of several frames in front are expressed as P1 (n), P2 (n), P3 (n) ... etc.P1 (n), P2 (n), P3 (n) ... there are the corresponding relation of strict time-domain (three-dimensional) in delay line data and current sampling point C (n); And C_u2 (n), there are the corresponding relation up and down of strict spatial domain (two-dimensional directional) in C_u1 (n), C_d1 (n), C_d2 (n) delay line data and current sampling point C (n), and the coordinate n with sampling point represents for the corresponding relation about spatial domain.Data delay line in the capable and field data Postponement module 1 of analog composite video signal passes to composite video signal the calculating that is used for the basic exercise amount in the motion detection block 4 based on video features.
Analog composite video signal realization capable and field data Postponement module 1 can be divided into two parts: (1) is for the frame delay data access, adopt plug-in static memory, rely on special-purpose storage control module to carry out data write, the data that write are the signal component after current time resamples from digital to analog converter, the requirement of the data based standard of reading is the corresponding data after the time-delay of 2 ~ 4 frames, and guarantee that reading of data and current data can obtain in certain window, expression for convenience, will be according to being expressed as P1 (n) shown in Fig. 2, P2 (n), P3 (n) ...; (2) part is the interior up-downgoing delay line of present frame in addition, the memory module that this part generally adopts chip internal, and it is comparatively convenient to read, and the phase alignment between guaranteeing up and down, generally speaking, these points adopt the sampling of 2 multiplying powers, therefore whenever walk to few 1716 storage cells for NTSC/PALM, whenever walk to few 1728 memory cell (sampling point) for PAL/PALNC, be expressed as C_u2 (n) respectively, C_u1 (n), C (n), C_d1 (n), C_d2 (n); Wherein C (n) is the current point of current line.For NTSC, C (n) sampling point and C_u1 (n), C_d1 (n) and P1 (n) will have the relatively strict anti-phase relation of colourity if belong to same color content, and with C_u2 (n), C_d2 (n) and P2 (n) have the same phase relation in form and aspect position; In PAL/PALM/PALNc, C (n) sampling point and C_u2 (n), C_d2 (n) and P2 (n) have the reverse relation of the colourity of being similar to if belong to same color property zone.These features will be as the precondition of comb filtering.
The analog composite video signal comb filtering of spatial domain and detection module 2 provide the quantitative information S (n) of the similarity (can carry out space filtering degree) of composite video sampling point on spatial domain, and corresponding light tone separation component Y
2D(n), C
2D(n); Comprise the light tone component data that current sampling point horizontal direction, vertical direction and oblique similarity information and corresponding comb filtering in present frame separate on the spatial domain direction.
The analog composite video signal comb filtering of spatial domain and detection module 2, main passing through to C_u2 (n), C_u1 (n), C (n), C_d1 (n), the most similar sampling point was gathered around the relationship analysis of C_d2 (n) in current sampling point window went out it, and carried out the light tone component Y that comb filtering obtains correspondence with it
2D(n), C
2D(n) and simultaneously obtain corresponding similarity and quantize information S (n);
[Y
2D(n), C
2D(n)]=f
Comb(C_u2 (n), C_u1 (n), C (n), C_d1 (n), C_d2 (n), S
k(n)), k represents all directions
S (n)=f
Sim(S
k(n), ρ
k) wherein, ρ
kBe the attenuation coefficient on this direction.
These attenuation coefficients depend on the zone of current sampling point, for example, and for the more texture region of details, ρ
kCan be so that S
k(n) more stable to noise; Certainly, for different standards, similarity S
k(n) calculating is also inequality, for example the most simply is defined as S among the NTSC
k(n)=LPF|C (n)-C
k(n) |, k=u2/d2/.... wherein.
Video features analysis module 3 is classified the space time feature of vision signal and is made corresponding quantization according to the requirement of motion detection block, as minutia κ (n), self-consistentency feature α (n), form and aspect bit integrity feature θ (n), light tone string winding degree feature
Space multidimensional spectrum signature ξ (n) or the like.Information after these quantize sends to move based on the motion detection block of video features by dedicated bus and quantizes to detect.
Video features analysis module 3 provides to the video sampling point spatially and the feature on the time-domain, and the definition of these features can adopt linear function to realize also can using nonlinear judgement, as minutia κ (n)=f
l(grad (C
K, LPF(n)), g
Fuzzy(C
K, HP(n), P
M, HP(n))) k=u2, u1 ..., d2; M=1 ..., be the gradient information of multidimensional, g
FuzzyFor go up the fuzzy extraction equation of high frequency luminance details according to light tone hybrid band (HP), a realization example the simplest is (a TSC-system formula);
And in the practical application, the parameter of video features analysis module 3 can also comprise the weighting control parameter of each component, to guarantee better controllability.Video features parameter after video features analysis module 3 will quantize passes to based on the basic exercise amount calculating sub module 401 in the motion detection block 4 of video features, submodule 402 is set and amount of exercise field/frame delay calculates 404 submodules based on the programmable movements amount calculating parameter of video features, is used for video features and calculates for the amount of exercise on basis.
For self-consistentency feature α (n), whether frame conversion light tone hypothesis separated consistent before and after it was used for expression, if unanimity then represent that current frame data relatively tends to do three-dimensional comb filtering need reduce the weight of calculating based on amount of exercise in the motion detection block 4 of video features; Otherwise expression is not suitable for, and needs to increase the weight that amount of exercise calculates in the step 4;
The form and aspect bit integrity information that the frame hypothesis decoding obtained before and after form and aspect bit integrity feature θ (n) was defined as is also represented with quantification manner in the practical application; Light tone string winding degree feature
Space multidimensional spectrum signature ξ (n) etc. has the corresponding quantitative definition mode.Information after these quantize sends to move based on the motion detection block 4 of video features by dedicated bus and quantizes to detect.
Motion detection block 4 based on video features comprises: basic exercise amount calculating sub module 401, and according to the time-domain basis difference component such as the low pass part absolute difference D of vision signal
LP(n), high frequency error D
HP(n), in-phase signal difference D
IN(n) etc., and utilize the energized condition that provides based on video features analysis module 3 to use adaptive point-to-point FUZZY ALGORITHMS FOR CONTROL to calculate, wherein point-to-point composite video data are that the data delay line after synchronously provides in the module 1; Programmable movements amount calculating parameter based on video features is provided with submodule 402, calculates the parameter setting of corresponding each component, has wherein also utilized the characteristics of image parameter after the quantification that module 3 provides; Chaos compound motion amount calculating sub module 403 calculates the controlled quentity controlled variable that is used to determine three-dimensional comb filtering degree---amount of exercise M
k(n); Amount of exercise forces to handle matched sub-block 407, nonlinear motion/static the imperative operation that in memory cell submodule 405, carries out storage of video fields/frames form and the high reliability that retaking of a year or grade is judged in many high reliability motion static detection submodules 406 according to amount of exercise field/frame delay calculating sub module 404, the optimization light tone of vision signals such as cartoon that this part logic is set to the colourity complex distribution of static superelevation bandwidth signal and rapid movement is separated provides effective guarantee: therefore, can reduce based on the motion detection block 4 momental calculating of video features:
Can also comprise the light tone separation component result's of three-dimensional calculating sub module based on the motion detection block 4 of video features, computing formula is as follows:
Y
3D(n)，C
3D(n)。
According to one embodiment of present invention, based on the motion detection block 4 of video features, can the tolerance that carry out three-dimensional light tone separation be mapped in the amount of exercise detection of this module, quantize more easily to calculate and handle, and below be the definition among this embodiment; Time-domain basis difference component such as low pass part absolute difference D according to vision signal
LP(n)=| C
LP(n)-P
1, LP(N) |
LPF, be defined as D for the amount of exercise error of high fdrequency component
HP(n)=min (| C
HP(n)-P
1, HP(n) |
LP, | C
HP(n)+P
1, HP(n) |
LP), NTSC in-phase signal difference component D
IN(n)=| C (n)-P
2(n) |
LPF, the in-phase component of PAL/PALM/PALNc is D
IN(n)=| C (n)-P
4(n) |
LPFPerhaps D
IN(n)=| C (n)+P
2(n)-P
3(n)-P
1(n) |
LPFDeng, the energized condition that provides in the video features analysis module 3 uses adaptive point-to-point FUZZY ALGORITHMS FOR CONTROL to calculate; Programmable movements amount calculating parameter based on video features is provided with the parameter setting that submodule 402 calculates corresponding each component, as D
LP(n), D
HP(n), D
IN(n) therefore weight coefficient can be understood as the characteristic parameter in the video features analysis module 3
Determined the value of these weight coefficients; Chaos compound motion amount calculating sub module 403 calculates the controlled quentity controlled variable that is used to determine three-dimensional comb filtering degree---amount of exercise M
k(n), for example a kind of simple definition mode is;
M
k(n)＝α1·(D
LP(n)-ε1)+α2·(D
HP(n)-ε2)+α3·(D
IN(n)-ε3)
Certainly, comprised simultaneously in the amount of exercise algorithm based on the motion detection block 4 of video features that amount of exercise forces to handle matched sub-block 407 nonlinear operations, in memory cell submodule 405, carry out the storage of video fields/frames form according to amount of exercise field/frame delay calculating sub module 404, in order to save memory space, this amount of exercise information is 1 to 3 bit width, and the motion/static imperative operation of the high reliability that retaking of a year or grade is judged in many high reliability motion static detection submodules 406, the number of fields of the field lag motion amount that reads is 2 ~ 6 field programmables, and the optimization light tone of vision signals such as cartoon that this part logic is set to the colourity complex distribution of static superelevation bandwidth signal and rapid movement is separated provides effective guarantee.
Brightness and chromatic component that three-dimensional comb filtering draws are:
Video features/amount of exercise self-adaptation three-dimensional comb filtering module 5 is according to the analog composite video signal comb filtering module 3 of spatial domain with based on the result of calculation of the motion detection block 4 of video features, and space similarity and amount of exercise carry out judgement and the mixing based on the self-adaptation three-dimensional comb filtering result of fuzzy logic.Comprise in this part specific implementation space similarity and momental preliminary treatment (filtering) and coupling normalizing, make it to meet the input range of fuzzy control; Certainly, the part of corresponding fuzzy control also can adopt the mode of look-up table; For example, a kind of implementation commonly used calculates the reliability λ of three-dimensional comb filtering
3D(n)=f
Fuzzy/LUT(S (n), M
k(n)), final YC component is:
Y
adpt(n)＝f
1(λ
3D(n)，Y
3D(n)，Y
2D(n))；
C
adpt(n)＝f
2(λ
3D(n)，C
3D(n)，C
2D(n))；
Video features/amount of exercise self-adaptation three-dimensional comb filtering module 5 is gone up amount of exercise M according to spatial correlation S (n) and time
k(n) filtered result carries out the weighting reliability λ that two-dimentional fuzzy control calculates three-dimensional comb filtering and space filtering
3D(n)=f
Fuzzy/LUT(S (n), M
k(n)), this ambiguity function and S (n) are approximate to be weak proportional relation, with M
k(n) be strong inverse relation, final YC component is:
Y
adpt(n)＝λ
3D(n)·Y
3D(n)+(1-λ
3D(n))·Y
2D(n)；
C
adpt(n)＝λ
3D(n)·C
3D(n)+(1-λ
3D(n))·C
2D(n)；；
Carry out reprocessing based on the light tone degree component post-processing module 6 of component motion according to the analog composite video signal comb filtering of spatial domain and detection module 2, video features analysis module 3 with based on the information that the motion detection block 4 of video features provides, make the picture content that finally obtains stablizing high-quality.
Light tone degree component post-processing module 6 based on component motion can be carried out reprocessing to the YC component that obtains, and can also utilize following formula that colourity is carried out quadrature demodulation and filtering and obtains color difference components.
Cb(n)＝LPF(C
adpt(n)·sin(ωn))；
Cr(n)＝LPF(C
adpt(n)·cos(ωn))；；
Based on the controlled amount of exercise information and the characteristics of image of being formed on of bandwidth of the low pass filter in the light tone degree component post-processing module 6 of component motion, in general, amount of exercise is big more, and the chrominance demodulation bandwidth can be narrow more, thereby effectively limit the iris noise jamming.。
Therefore, the present invention is based on the self-adaptation three-dimensional comb filter system of Analog Composite Video feature signature analysis, by the analytical calculation of data characteristics in the data deferred mount being stablized the component motion of anti-noise, constitute the judgement of the light tone component of three-dimensional adaptive comb filtering with the spatial coherence component, and, obtain the color video frequency image of high-quality through chrominance demodulation with based on the adaptive filtering reprocessing of amount of exercise; The device of this invention is specially adapted to decoding and the processing at analog composite video signal in the television receiver.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (14)
1. three-dimensional adaptive combined comb filtering system, comprising:
Capable and the field data Postponement module of analog composite video signal, postpone with the field frame format of memory according to composite video signal, make the contiguous sampling point and the current sampling point of current sampling point have strict phase relation, for three-dimensional comb filtering provides the colourity phase modulation relation of analog composite video signal under different systems;
The analog composite video signal comb filtering and the detection module of spatial domain, composite video signal capable to analog composite video signal and that the field data Postponement module postponed is carried out the comb filtering on the space, obtain the degree of correlation correlation on the space, and provide effective reference signal for three-dimensional comb filtering;
The video features analysis module provides to the video sampling point spatially and the feature on the time-domain, whether carries out the reference signal that three-dimensional light tone is separated for three-dimensional comb filtering provides;
Based on the motion detection block of video features, can the tolerance that carry out three-dimensional light tone separation be mapped in the amount of exercise detection of this module, quantizes to calculate and handle, and obtains the motion detection amount;
Video features/amount of exercise self-adaptation three-dimensional comb filtering module, when described video features analysis module is sent the reference signal of carrying out three-dimensional light tone separation, the colourity phase modulation relation of analog composite video signal under different systems capable according to described analog composite video signal and the field data Postponement module provides, carry out the filtering of brightness and colourity, and the degree of correlation correlation on the space that provides according to the analog composite video signal comb filtering module of described motion detection amount that obtains based on the motion detection block of video features and described spatial domain, carry out the judgement that various light tones are separated, obtain luminance component; Reach light tone degree component post-processing module, the luminance component that obtains is carried out reprocessing, and colourity is separated mediation filtering, finish based on momental brightness and colourity reprocessing based on component motion.
2. three-dimensional adaptive combined comb filtering system as claimed in claim 1 is characterized in that, the capable and field data Postponement module of described analog composite video signal comprises the basic handling submodule, to the basic handling of Analog Composite Video sampled signal.
3. three-dimensional adaptive combined comb filtering system as claimed in claim 1 or 2, it is characterized in that, capable and the field data Postponement module of described analog composite video signal comprises that also synchronizing signal arranges submodule, the synchronizing signal that provides according to the synchronizer of outside is arranged in the alignment thereof that subsequent module is wished with sampled point: current some signal indication when the front court is C (n), the adjacent row signal is expressed as C_u2 (n) respectively in the present frame, C_u1 (n), C_d1 (n), C_d2 (n), the data of the corresponding current line of several frames in front are expressed as P1 (n), P2 (n), P3 (n) ... Deng.
4. three-dimensional adaptive combined comb filtering system as claimed in claim 1, it is characterized in that, the analog composite video signal comb filtering module of described spatial domain provides the quantitative information S (n) of the similarity of composite video sampling point on spatial domain, and corresponding light tone separation component Y
2D(n), C
2D(n); Comprise the light tone component data that current sampling point horizontal direction, vertical direction and oblique similarity information and corresponding comb filtering in present frame separate on the spatial domain direction.
5. three-dimensional adaptive combined comb filtering system as claimed in claim 1, it is characterized in that, described video features analysis module is classified the space time feature of vision signal and is made corresponding quantization according to the requirement of described motion detection block, and the information after quantizing is sent to described motion detection block based on video features by dedicated bus moves and quantize to detect.
6. three-dimensional adaptive combined comb filtering system as claimed in claim 1 is characterized in that, the parameter of described video features analysis module can also comprise the weighting control parameter of each component.
7. three-dimensional adaptive combined comb filtering system as claimed in claim 1, it is characterized in that, motion detection block based on video features comprises: basic exercise amount calculating sub module, according to the time-domain basis difference component of vision signal, and utilize the energized condition that provides based on the video features analysis module to use adaptive point-to-point FUZZY ALGORITHMS FOR CONTROL to calculate; Programmable movements amount calculating parameter based on video features is provided with submodule, calculates the parameter setting of corresponding each component; Chaos compound motion amount calculating sub module calculates the controlled quentity controlled variable that is used to determine three-dimensional comb filtering degree---amount of exercise M
k(n).
8. three-dimensional adaptive combined comb filtering system as claimed in claim 7, it is characterized in that, described motion detection block based on video features also further comprises amount of exercise pressure processing matched sub-block, amount of exercise field/frame delay calculating sub module, sub module stored and many high reliability motion static detection submodules, described amount of exercise pressure processing matched sub-block is nonlinear carries out the storage of video fields/frames form according to described amount of exercise field/frame delay calculating sub module in described sub module stored, and the motion/static imperative operation of the high reliability that retaking of a year or grade is judged in described many high reliability motion static detection submodules.
9. as claim 1 or 8 described three-dimensional adaptive combined comb filtering systems, it is characterized in that described motion detection block based on video features also comprises the light tone separation component result's of three-dimensional calculating sub module.
10. three-dimensional adaptive combined comb filtering system as claimed in claim 1, it is characterized in that the degree of correlation correlation on the space that described video features/amount of exercise self-adaptation three-dimensional comb filtering module provides according to the analog composite video signal comb filtering module of described motion detection amount that obtains based on the motion detection block of video features and described spatial domain is carried out judgement and the mixing based on the self-adaptation three-dimensional comb filtering result of fuzzy logic.
11. three-dimensional adaptive combined comb filtering system as claimed in claim 10, it is characterized in that, described video features/amount of exercise self-adaptation three-dimensional comb filtering module is carried out preliminary treatment (filtering) and coupling normalizing to space similarity and amount of exercise, makes it to meet the input range of fuzzy control.
12. three-dimensional adaptive combined comb filtering system as claimed in claim 10 is characterized in that, described fuzzy logic can adopt the mode of look-up table, according to following formula λ
3D(n)=f
Fuzzy/LUT(S (n), M
k(n)) reliability of the three-dimensional comb filtering of calculating, final YC component is:
Y
adpt(n)＝f
1(λ
3D(n)，Y
3D(n)，Y
2D(n))；
C
adpt(n)＝f
2(λ
3D(n)，C
3D(n)，C
2D(n))；
13. three-dimensional adaptive combined comb filtering system as claimed in claim 1, it is characterized in that, described light tone degree component post-processing module based on component motion is carried out reprocessing according to the analog composite video signal comb filtering module of described spatial domain, described video features analysis module and the described information that provides based on the motion detection block of video features, obtains stablizing the picture content of high-quality.
14. three-dimensional adaptive combined comb filtering system as claimed in claim 1, it is characterized in that, described light tone degree component post-processing module based on component motion can be carried out reprocessing to the YC component that obtains, and can also utilize following formula that colourity is carried out quadrature demodulation and filtering and obtains color difference components.
Cb(n)＝LPF(C
adpt(n)·sin(ωn))；
Cr(n)＝LPF(C
adpt(n)·cos(ωn))；；
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800903A (en) * | 2010-03-04 | 2010-08-11 | 凌阳科技股份有限公司 | Decoding and de-interlacing system and method of CVBS (Composite Video Broadcast Signal) |
| CN102123289A (en) * | 2010-12-28 | 2011-07-13 | 华亚微电子（上海）有限公司 | Image motion estimation method and device in three-dimensional comb filtering |
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2008
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800903A (en) * | 2010-03-04 | 2010-08-11 | 凌阳科技股份有限公司 | Decoding and de-interlacing system and method of CVBS (Composite Video Broadcast Signal) |
| CN102123289A (en) * | 2010-12-28 | 2011-07-13 | 华亚微电子（上海）有限公司 | Image motion estimation method and device in three-dimensional comb filtering |
| CN102123289B (en) * | 2010-12-28 | 2013-12-25 | 华亚微电子（上海）有限公司 | Image motion estimation method and device in three-dimensional comb filtering |
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