CN101800903A - Decoding and de-interlacing system and method of CVBS (Composite Video Broadcast Signal) - Google Patents
Decoding and de-interlacing system and method of CVBS (Composite Video Broadcast Signal) Download PDFInfo
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Abstract
The invention provides decoding and de-interlacing system and method of a CVBS. A two-dimensional luminance and chrominance separating device receives a sampled CVBS corresponding to a field image signal, and a two-dimensional luminance signal and a two-dimensional chrominance signal is separated and generated in the sampled CVBS. The two-dimensional chrominance signal is converted into a two-dimensional color difference signal by a chrominance-color difference converter. A zooming synchronizer is used for respectively carrying out synchronous operation on the sampled CVBS, the two-dimensional luminance signal and the two-dimensional color difference signal to respectively generate a synchronous CVBS, a synchronous two-dimensional luminance signal and a synchronous two-dimensional color difference signal. A temporary storage device is used for temporarily storing the synchronous CVBS, the synchronous two-dimensional luminance signal and the synchronous two-dimensional color difference signal. A three-dimensional luminance and color difference separating, noise-removing and de-interlacing device is used for executing three-dimensional luminance and color difference separation, noise removal and de-interlacing operation to generate a picture frame signal.
Description
Technical field
The present invention system relates to the image image processing field, refers to a kind of decoding and wrong system and method for reciprocal cross of CVBS signal especially.
Background technology
Because it is that signal with brightness and chroma coincides and transmitted on a carrier wave again that existing TV signal sends.The benefit of doing like this is that black and white television set and color television set can receive same signal, and therefore there is its necessity in the past really when the age that black and white television set is just converting color television set to.
As shown in Figure 1, video signal composite signal (composite signal) has comprised luminance signal (luminance) and chroma signals (chroma), wherein, at NTSC (National Television System Committee, NTSC) in the system, the centre frequency of chroma signals is 3.58MHz, at line-by-line inversion (PhaseAlternation Line, PAL) in the system, the centre frequency of chroma signals is 4.43MHz.When video decoder received video compositing signal, it was carried out Y/C earlier and separates (Y/C separation), so that wherein luminance signal and chroma signals are separated, used for subsequent treatment.
Fig. 2 is the schematic diagram of General Two-Dimensional brightness signal separation and chroma signals, it uses notch filter (notch filter), obtain luminance signal with the decay chroma signals, use a band pass filter (band pass filter) simultaneously to obtain chroma signals.Because chroma signals uses 3.58 (NTSC) or 4.43 (PAL) MHz carrier wave to transmit in conjunction with luminance signal, the radio-frequency component of luminance signal takies identical frequency spectrum with chroma signals, though adopt notch filter and band pass filter luminance signal and chroma signals can be separated, but be easy to think the part that belonged to luminance signal originally by mistake chroma signals, and produce serious colour contamination (cross-color) phenomenon, the part that also will belong to simultaneously chroma signals is easily originally thought luminance signal by mistake, and produces serious line (cross-luminance) phenomenon of trembling.
Because when the signal of brightness and chroma coincided together, the carrier wave of part can overlap and can't accurately separate, cause and to reduce brightness and chroma accurately, the flaw on the formation picture.Such as this phenomenon of color that can cause on the picture as the rainbow that so-called colour contamination (Cross-Color Artifact) occurs is handled in brightness as chroma, and chroma is handled as brightness what is called then can be occurred and tremble the level of line (Cross-Luminance) or vertical dotted line.At the problems referred to above, three-dimensional luminance is separated (3DY/C separation) with chroma be exactly a kind of brightness and good method of chroma that is used for separating video compositing signal (compositesignal).
The noise that TV signal is produced when transmission, can be by the so-called technology that suppresses noise (noise reduction), unnecessary or unsettled signal is filtered in advance, produce the degree of snowflake or the ghost phenomena that dynamic television image is easy to generate to reduce television image.
In order to reduce the bandwidth of film flicker and data transmission, the interleaved type scanning mode is used in the traditional tv system widely.Yet, because traditional interleaved type scanning defective in the sky earlier makes that some undesirable visual effects take place exquisite picture part easily in image, for example line ficker, lines shake.Because the progress of science and technology, recent years, LCD TV development apace, simultaneously in order to pursue more images with high image quality, the numeral Digital Television also begins to support that formula scanning picture is to increase the quality of picture in proper order, therefore in digital Digital Television, use de-interlace method for traditional interleaved type scanning format picture being converted to the technology of formula scanning picture in proper order.
Fig. 3 is the decoding and the wrong system of reciprocal cross of known CVBS signal, two dimension brightness and tone separation apparatus 310 and three-dimensional luminance and tone separation apparatus 320 receive respectively and blend together composite signal CVBS4, this blendes together composite signal CVBS4 system corresponding to figure a 4 (field, field 4), and carry out two-dimentional brightness and chrominance separation computing and three-dimensional luminance and chrominance separation computing respectively, and produce two-dimentional luminance signal (2D Y4) and two-dimensional chromaticity signal (2D C4), three-dimensional luminance signal (3D Y4) and three-dimensional carrier chrominance signal (3D C4).
When the three-dimensional luminance of this three-dimensional luminance and tone separation apparatus 320 execution composite signal CVBS4 and chrominance separation computing, by apparatus for temporary storage 330 will before store corresponding to figure 4 (field, field 4) composite signal CVBS0 read, to carry out brightness and chrominance separation, and calculate the moving ratio signal (motion ratio) of this composite signal CVBS4 (figure 4) and write in this apparatus for temporary storage 330, simultaneously this composite signal CVBS4 is write in this apparatus for temporary storage 330, to replace this composite signal CVBS0.
Mix and colourity to aberration conversion equipment 340 mixes two-dimentional luminance signal (2D Y4), two-dimensional chromaticity signal (2D C4), three-dimensional luminance signal (3D Y4) and three-dimensional carrier chrominance signal (3D C4) and by carrier chrominance signal convert to color difference signal (Y4, UV4).Color difference signal (Y4, there is a behaviour area (activeregion) corresponding diagram field 4 UV4), and (Y4 UV4) finds out the signal Y4UV 4 ' of corresponding behaviour area by color difference signal for 350 of convergent-divergent synchronizers.3D noise remove device 360 is with the noise remove among the signal Y4UV4 ' and produce de-noised signal Y4UV4 ".3D reciprocal cross misloading puts 370 by reading de-noised signal Y2UV2 in the apparatus for temporary storage 330 ", de-noised signal Y1UV1 ", and de-noised signal Y0UV0 " carrying out reciprocal cross fault reason, and to produce one be the picture frame at center scheme field 1.
Put 370 when 3D reciprocal cross misloading and read on the one hand de-noised signal Y0UV0 in by apparatus for temporary storage 330 " time, 3D noise remove device 360 is also simultaneously with de-noised signal Y4UV4 " write in the apparatus for temporary storage 330, and progressively lid falls de-noised signal Y0UV0 ".
In the decoding and the wrong system of reciprocal cross of known CVBS signal, when carrying out brightness and aberration separation, three-dimensional luminance and aberration separator 320 need use moving ratio signal (motion ratio), and 3D reciprocal cross misloading is put 370 and is carried out and also need use the moving ratio signal (motion ratio) of correlation diagram field when the reciprocal cross Wrong Shipments are calculated, therefore in apparatus for temporary storage 330, need store moving ratio signal (motion ratio) respectively to three-dimensional luminance and 320 uses of aberration separator, reach to 3D reciprocal cross misloading and put the 370 moving ratio signals (motion ratio) that use, this causes apparatus for temporary storage 330 that more storage area need be arranged.Simultaneously, need store a plurality of CVBS signals in the apparatus for temporary storage 330 respectively, reach a plurality of de-noised signal of putting 370 uses for 3D reciprocal cross misloadings to three-dimensional luminance and 320 uses of aberration separator, when figure field desorptiion degree increases, the storage area of apparatus for temporary storage 330 also strengthens thereupon, and increase many hardware costs, therefore, the wrong system and method for the decoding of known CVBS signal and reciprocal cross still has the space of improvement.
Summary of the invention
Purpose of the present invention is mainly decoding and the wrong system and method for reciprocal cross that the CVBS signal is provided, with minimizing memory use amount, and the data rate of minimizing storage access, and reduce memory access bandwidth, then reduce the time sequence frequency of total system, and reduce the energy consumption of total system.
According to characteristic of the present invention, the present invention proposes a kind of decoding of CVBS signal and the wrong system of reciprocal cross, its comprise two-dimentional brightness and tone separation apparatus, colourity to aberration conversion equipment, convergent-divergent synchronizer, apparatus for temporary storage, and three-dimensional luminance and aberration separation, noise remove and reciprocal cross misloading put.This two dimension brightness and tone separation apparatus receive sampling CVBS signal, and this sampling CVBS signal is corresponding to picture field picture signal (field), and by separation in this sampling CVBS signal and produce two-dimentional luminance signal and two-dimensional chromaticity signal.This colourity to aberration conversion equipment is connected to this two dimension brightness and tone separation apparatus, so that this two-dimensional chromaticity conversion of signals is become two-dimentional color difference signal.This convergent-divergent synchronizer is connected to this two dimension brightness and tone separation apparatus, receive the CVBS signal of this sampling, carry out synchronous computing with CVBS signal, this two dimension luminance signal and this two dimension color difference signal to this sampling respectively, and produce synchronous CVBS signal, synchronous two-dimentional luminance signal, and synchronous two-dimentional color difference signal respectively.This apparatus for temporary storage is connected to this convergent-divergent synchronizer, to keep in this synchronous CVBS signal, to reach this synchronous two-dimentional color difference signal.This three-dimensional luminance and aberration separation, noise remove and reciprocal cross misloading are put and are connected to this convergent-divergent synchronizer and this apparatus for temporary storage, with carry out three-dimensional luminance and chrominance separation, noise remove, and the reciprocal cross Wrong Shipment calculate, and produce the picture frame signal.
According to the present invention another characteristic, the present invention proposes a kind of decoding and deinterleaving method of CVBS signal, comprises the following step: (A) receive sampling CVBS signal, this sampling CVBS signal system is corresponding to the picture field picture signal; (B) use two-dimentional brightness and tone separation apparatus with by separation in this sampling CVBS signal and produce two-dimentional luminance signal and two-dimensional chromaticity signal; (C) use colourity to the aberration conversion equipment so that this two-dimensional chromaticity conversion of signals is become two-dimentional color difference signal; (D) use the convergent-divergent synchronizer respectively this sampling CVBS signal, this two dimension luminance signal and this two dimension color difference signal being carried out synchronous computing, and produce synchronous CVBS signal, synchronous two-dimentional luminance signal, synchronous two-dimentional color difference signal respectively; (E) use three-dimensional luminance and aberration separator with by this synchronous CVBS signal, this synchronous two-dimentional color difference signal, and first preamble CVBS signal, separate and produce three-dimensional luminance signal and three-dimensional color difference signal; (F) use mixing arrangement according to the moving ratio signal, so that this synchronous two-dimentional luminance signal, this synchronous two-dimentional color difference signal, this three-dimensional luminance signal and this three-dimensional color difference signal are mixed, to produce vision-mix field picture signal; (G) use the noise remove device according to this vision-mix field picture signal, and previous vision-mix field picture signal, carry out the noise remove computing, to produce denoising picture field picture signal; (H) use the reciprocal cross misloading to put,, carry out the reciprocal cross Wrong Shipment and calculate, to produce the wrong picture frame picture signal of reciprocal cross according to this denoising picture field picture signal, and previous denoising picture field picture signal.
Description of drawings
Fig. 1 is the schematic diagram of video compositing signal.
Fig. 2 is the known two dimensional separation luminance signal and the schematic diagram of chroma signals.
Fig. 3 is the decoding of known CVBS signal and the calcspar of the wrong system of reciprocal cross.
Fig. 4 is the decoding of a kind of CVBS signal of the present invention and the calcspar of the wrong system of reciprocal cross.
The schematic diagram that Fig. 5 carries out for convergent-divergent synchronizer of the present invention.
Fig. 6 is the schematic diagram of apparatus for temporary storage access of the present invention.
Fig. 7 is another schematic diagram of apparatus for temporary storage access of the present invention.
Fig. 8 is the calcspar of mixing arrangement of the present invention.
Fig. 9 is the decoding of a kind of CVBS signal of the present invention and the flow chart of deinterleaving method.
Figure 10 is the decoding of known CVBS signal and the sequential chart of the wrong system of reciprocal cross.
Figure 11 is the decoding of CVBS signal of the present invention and the sequential chart of the wrong system of reciprocal cross.
Figure 12 is the present invention and known technology memory use schematic diagram relatively.
[Reference numeral]
Two dimension brightness and tone separation apparatus 310
Three-dimensional luminance and tone separation apparatus 320
Apparatus for temporary storage 330 convergent-divergent synchronizers 350
Mixing and colourity are to aberration conversion equipment 340
3D noise remove device 360 3D reciprocal cross misloadings put 370
Analog-digital commutator 410 line buffers 420
Two dimension brightness and tone separation apparatus 430
Colourity is to aberration conversion equipment 440 convergent-divergent synchronizers 450
Three-dimensional luminance and aberration separation, noise remove and reciprocal cross misloading put 470
Three-dimensional luminance and aberration separator 471
Noise remove device 475 reciprocal cross misloadings put 477
Luminance weighted device 710 colourity weighting devices 720
Step (A)～step (H), step (A0), step (E1)
Embodiment
Fig. 4 is the calcspar of the decoding of a kind of CVBS signal of the present invention and the wrong system of reciprocal cross, and it comprises: analog-digital commutator 410, line buffer 420, two-dimentional brightness and tone separation apparatus 430, colourity to aberration conversion equipment 440, convergent-divergent synchronizer 450, and three-dimensional luminance and aberration separation, noise remove and reciprocal cross misloading put 470.
This analog-digital commutator 410 receives simulation CVBS signals, to this CVBS sample of signal and convert digital form to, and produces sampling CVBS signal (CVBS4), and this sampling CVBS signal (CVBS4) is corresponding to a figure field F 4.
This line buffer 420 is connected to this analog-digital commutator 410 and this two dimension brightness and tone separation apparatus 430, with temporary this sampling CVBS signal.
This two dimension brightness and tone separation apparatus 430 are connected to this line buffer 420, receiving this sampling CVBS signal (CVBS4), and by separating in this sampling CVBS signal (CVBS4) and producing two-dimentional luminance signal (2D Y4) and two-dimensional chromaticity signal (2D C4).
This colourity to aberration conversion equipment 440 is connected to this two dimension brightness and tone separation apparatus 430, to convert this two-dimensional chromaticity signal (2D C4) to two-dimentional color difference signal (2D UV4).
This convergent-divergent synchronizer 450 is connected to this line buffer 410, this two dimension brightness and tone separation apparatus 430, and this colourity is to aberration conversion equipment 440, receive the CVBS signal (CVBS4) of this sampling respectively, this two dimension luminance signal (2D Y4) and this two dimension color difference signal (2D UV4), and respectively to the CVBS signal (CVBS4) of this sampling, this two dimension luminance signal (2D Y4) and this two dimension color difference signal (2DUV4) carry out synchronous computing, and produce synchronous CVBS signal (CVBS4 ') respectively, synchronous two-dimentional luminance signal (2D Y4 '), and synchronous two-dimentional color difference signal (2D UV4 ').
Fig. 5 is the schematic diagram of convergent-divergent synchronizer 450 execution of the present invention.As shown in Figure 5, in NTSC or PAL standard, definition has behaviour area (active region), yet when NTSC or PAL signal encoding, NTSC that each manufacturer produced or PAL signal have a little error, or when transmission is because of the distortion that finite bandwidth produced of transmission medium, or when transmission The noise, can make NTSC or PAL activity district (active region) produce skew, this convergent-divergent synchronizer 450 is according to the CVBS signal (CVBS4) of this sampling, this two dimension luminance signal (2D Y4) and this two dimension color difference signal (2D UV4), to find out the behaviour area (active region) in the figure field 4, and the skew of corrigendum behaviour area (active region), and CVBS signal (CVBS4) and default display image resolution according to this sampling, carry out the convergent-divergent computing, and produce synchronous CVBS signal (CVBS4 ') respectively, synchronous two-dimentional luminance signal (2DY4 '), an and synchronous two-dimentional color difference signal (2D UV4 ').
Since the horizontal blanking (horizontal blanking) among figure the F 4 and the pixel of vertical blanking (vertical blanking) after computing in can't use, therefore this convergent-divergent synchronizer 450 also will scheme horizontal blanking among the F4 simultaneously and the pixel of vertical blanking removes, with the minimizing data quantity.As shown in Figure 5, its resolution that will scheme F4 becomes 720X288 removed the pixel of horizontal blanking and vertical blanking by 858X323 after, to reduce the data quantity that stores.
This apparatus for temporary storage 460 is connected to this convergent-divergent synchronizer 450, with temporary this synchronous CVBS signal (CVBS4 '), reach this synchronous two-dimentional color difference signal (2D UV4 ').This line buffer 420 and this apparatus for temporary storage 460 can be integrated in the single memory.
It is to be connected to this convergent-divergent synchronizer 450 and this apparatus for temporary storage 460 that this three-dimensional luminance and aberration separation, noise remove and reciprocal cross misloading put 470, to carry out three-dimensional luminance and chrominance separation, noise remove, to reach reciprocal cross Wrong Shipment calculation, and producing the picture frame signal, this picture frame signal system is the center to scheme a F3.
This three-dimensional luminance and chrominance separation, noise remove and reciprocal cross misloading put 470 comprise three-dimensional luminance and aberration separator 471, mixing arrangement 473, noise remove device 475, and the reciprocal cross misloading put 477.
This three-dimensional luminance and aberration separator 471 are connected to this convergent-divergent synchronizer 450 and this apparatus for temporary storage 460, receive this synchronous CVBS signal (CVBS4 ') of these convergent-divergent synchronizer 450 outputs, this synchronous two-dimentional color difference signal (2D UV4 '), and be stored in the first preamble CVBS signal (CVBS0 ') of this apparatus for temporary storage, and this synchronous CVBS signal (CVBS4 ') carried out three-dimensional luminance and aberration separation algorithm, producing three-dimensional luminance signal (3D Y4) and this synchronous two-dimentional color difference signal and the first preamble two dimension color difference signal that is stored in this apparatus for temporary storage averaged computing producing three-dimensional color difference signal (3D UV4), this convergent-divergent synchronizer 450 and simultaneously should synchronous CVBS signal (CVBS4 ') be stored in this apparatus for temporary storage.
This three-dimensional luminance and aberration separator 471 comprise motion detection device 479.This motion detection device 479 be connected to this convergent-divergent synchronizer 450, and this noise remove 475 put 477 with the reciprocal cross misloading, (3D UV4 is with generation moving ratio signal (motion ratio) according to this synchronous CVBS signal of this convergent-divergent synchronizer 450 outputs (CVBS4 '), this three-dimensional luminance signal (3D Y4) and this three-dimensional color difference signal.
Fig. 6 is the schematic diagram of apparatus for temporary storage 460 accesses of the present invention, as shown in Figure 6, this three-dimensional luminance and aberration separator 471 can be read pixel (0 in the CVBS0 ' signal when sequential ck0,0) data, this convergent-divergent synchronizer 450 then can write pixel (0 in the CVBS4 ' signal when sequential ck1,0) data, and be stored in the storage location of pixel in the CVBS0 ' signal (0,0).By this, 460 of this apparatus for temporary storage need to store 4 figure data quantity, and it is respectively CVBS0 ', CVBS1 ', CVBS2 ', reaches CVBS3 '.Fig. 7 is another schematic diagram of apparatus for temporary storage 460 accesses of the present invention, and it takes looser sequential.In like manner, also be so for the access of this synchronous two-dimentional color difference signal (2D UV4 '), repeat no more.
This mixing arrangement 473 is connected to this convergent-divergent synchronizer 450 and this three-dimensional luminance and aberration separator 471, according to this moving ratio signal, so that this synchronous two-dimentional luminance signal (2D Y4 '), this synchronous two-dimentional color difference signal (2D UV4 '), this three-dimensional luminance signal (3D Y4) and this three-dimensional color difference signal (3D UV4) are mixed, and generation vision-mix field picture signal (Y4, UV4).
Fig. 8 is the calcspar of this mixing arrangement 473 of the present invention.This mixing arrangement 473 comprises luminance weighted device 710 and colourity weighting device 720.
This luminance weighted device 710 is connected to this convergent-divergent synchronizer 450 and this three-dimensional luminance and aberration separator 471, pixel (i when this moving ratio signal indication correspondence, during j) for absolute rest point, with this three-dimensional luminance signal (3D Y4) is this vision-mix field picture signal (Y4), pixel (i when this moving ratio signal indication correspondence, j) between absolute rest point and be anything but in the middle of the rest point time to this synchronous two-dimentional luminance signal (2D Y4 ') and this three-dimensional luminance signal (3D Y4) execution ranking operation, to produce vision-mix field picture signal (Y4), pixel (i when this moving ratio signal indication correspondence, when j) being rest point anything but, be this vision-mix field picture signal (Y4) with this synchronous two-dimentional luminance signal (2D Y4 ').
This colourity weighting device 720 is connected to this convergent-divergent synchronizer 450 and this three-dimensional luminance and aberration separator 471, pixel (i when this moving ratio signal indication correspondence, when j) being rest point, this synchronous two-dimentional color difference signal (2D UV4 ') and this three-dimensional color difference signal (3D UV4) are carried out ranking operation, to produce vision-mix field picture signal (UV4), pixel (i when this moving ratio signal indication correspondence, when j) being rest point anything but, with this synchronous two-dimentional color difference signal (2D UV4 ') as this vision-mix field picture signal (UV4).
This noise remove device 475 is connected to this mixing arrangement 473 and this apparatus for temporary storage 460, according to this vision-mix field picture signal (Y4UV4) of this mixing arrangement output 473, and the previous vision-mix field picture signal that stores of this apparatus for temporary storage (Y2UV2 "); carry out the noise remove computing, to produce denoising picture field picture signal (Y4UV4 ").
This reciprocal cross misloading is put 477 and is connected to this three-dimensional luminance and aberration separator 471, this noise remove device 475 and this apparatus for temporary storage 460, according to this denoising picture field picture signal of this noise remove device 475 outputs (Y4UV4 "), and these apparatus for temporary storage storage 460 previous denoising picture field picture signals of depositing (Y3UV3 ", Y2UV2 "); carry out the reciprocal cross Wrong Shipment and calculate; to produce the wrong picture frame picture signal (Y3UV3) of reciprocal cross, the wrong picture frame picture signal of this reciprocal cross system is the picture frame at center to scheme a F3.
Fig. 9 is the decoding of a kind of CVBS signal of the present invention and the flow chart of deinterleaving method.At first, in step (A0), use analog-digital commutator, receiving simulation CVBS signal, and to this simulation CVBS sample of signal and convert digital form to, and produce the CVBS signal of taking a sample.In step (A), receive this sampling CVBS signal (CVBS4), this sampling CVBS signal (CVBS4) is corresponding to a figure F 4.
In step (B), use two-dimentional brightness and tone separation apparatus 430 with by separating in this sampling CVBS signal (CVBS4) and producing two-dimentional luminance signal (2D Y4) and two-dimensional chromaticity signal (2D C4).
In step (C), use colourity to aberration conversion equipment 440 to convert this two-dimensional chromaticity signal (2D C4) to two-dimentional color difference signal (2D UV4).
In step (D), use convergent-divergent synchronizer 450 respectively this sampling CVBS signal, this two dimension luminance signal (2D Y4) and this two dimension color difference signal (2dUV4) being carried out synchronous computing, and produce synchronous CVBS signal (CVB S4 '), synchronous two-dimentional luminance signal (2D Y4 '), synchronous two-dimentional color difference signal (2D UV4 ') respectively.
In step (E), use three-dimensional luminance and aberration separator 471 and according to this synchronous CVBS signal (CVBS4 '), this synchronous two-dimentional color difference signal (2D UV4 '), reach first preamble CVBS signal (CVBS0 '), this synchronous CVBS signal (CVBS4 ') is carried out three-dimensional luminance and aberration separation algorithm, separate and produce three-dimensional luminance signal (3D Y4) and three-dimensional color difference signal (3D UV4);
In step (E1), use motion detection device 479 according to this synchronous CVBS signal, this three-dimensional luminance signal and this three-dimensional color difference signal, to produce this moving ratio signal.
In step (F), use mixing arrangement 473 according to a moving ratio signal, so that this synchronous two-dimentional luminance signal (2D Y4 '), this synchronous two-dimentional color difference signal (2DUV4 '), this three-dimensional luminance signal and this three-dimensional color difference signal are mixed (3DY4UV4), to produce vision-mix field picture signal (Y4UV4).
In step (G), use noise remove device 475 according to this vision-mix field picture signal (Y4UV4), and previous vision-mix field picture signal (Y2UV2 "), carry out the noise remove computing, to produce denoising picture field picture signal (Y4UV4 ").
In step (H), use the reciprocal cross misloading put 477 according to this denoising picture field picture signal (Y4UV4 "), and previous denoising picture field picture signal (Y3UV3 ", Y2UV2 "), carry out the reciprocal cross Wrong Shipment and calculate, to produce the wrong picture frame picture signal (Framed Y3UV3) of reciprocal cross.
Illustrate to scheme F4 in the present embodiment, be more vague generalization, step (A) is to receive Fi+4 figure sampling CVBS signal, and wherein i is an integer, in other steps, can flow chart by Fig. 9 in corresponding figure field and knowing by inference, will not give unnecessary details.
Figure 10 is the decoding of known CVBS signal and the sequential chart of the wrong system of reciprocal cross, and wherein, YMR4 is the moving ratio signal of Y2 and Y4, is the function (the same YMR4 of the definition of YMR0, YMR1, YMR2 and YMR3) of difference between Y4 and Y2; Figure 11 is the decoding of CVBS signal of the present invention and the sequential chart (the same YMR4 of the definition of YMR5, YMR6 and YMR7) of the wrong system of reciprocal cross, and Figure 12 is the present invention and known technology memory use schematic diagram relatively.As shown in Figure 12, memory use amount of the present invention is 1.99Mbyte, and known technology memory use amount is 2.97Mbyte, and storage access data rate of the present invention is 116.25Mbyte/Sec, and the storage access data rate of known technology is 171Mbyte/Sec.In Figure 12, when calculating CVBS memory use amount, because the UV signal of will decoding, so need higher resolution, so use the resolution of 10-bit in the known technology, to store the CVBS signal.
With known art, framework of the present invention can make to carry out and reduce by a figure memory use amount when the reciprocal cross Wrong Shipment is calculated, and simultaneously, moving ratio signal (motionratio) only needs to store a.This apparatus for temporary storage 460 is that temporary this synchronous CVBS signal (CVBS4 ') after handling via this convergent-divergent synchronizer 450 reaches this synchronous two-dimentional color difference signal (2d UV4 '), its memory use amount is 1.19Mbytes (0.79+0.4), and known technology is because without Synchronous Processing, its memory use amount is 1.32Mbytes, is many than the present invention also.
In sum as can be known, compared to known technology, the present invention not only can reduce the memory use amount, also can reduce the data rate of storage access, and the reduction memory access bandwidth reduces the time sequence frequency of total system then, to reduce the energy consumption of total system.
From the above, no matter the present invention all shows it differ from the feature of known technology, have practical value with regard to purpose, means and effect.Only it should be noted that above-mentioned many embodiment only give an example for convenience of explanation, protection scope of the present invention should be as the criterion with the described protection range of claim, but not only limits to the foregoing description.
Claims (17)
1. the wrong system of the decoding of a CVBS signal and reciprocal cross comprises:
Two dimension brightness and tone separation apparatus are used for receiving sampling CVBS signal, and this sampling CVBS signal system is corresponding to the picture field picture signal, and by separation in this sampling CVBS signal and produce two-dimentional luminance signal and two-dimensional chromaticity signal;
Colourity is connected to this two dimension brightness and tone separation apparatus to the aberration conversion equipment, so that this two-dimensional chromaticity conversion of signals is become two-dimentional color difference signal;
The convergent-divergent synchronizer, be connected to this two dimension brightness and tone separation apparatus and this colourity to the aberration conversion equipment, receive the CVBS signal of this sampling, carry out synchronous computing with CVBS signal, this two dimension luminance signal and this two dimension color difference signal to this sampling respectively, and produce synchronous CVBS signal, synchronous two-dimentional luminance signal, and synchronous two-dimentional color difference signal respectively;
Apparatus for temporary storage is connected to this convergent-divergent synchronizer, to keep in this synchronous CVBS signal, to reach this synchronous two-dimentional color difference signal; And
Three-dimensional luminance and aberration separation, noise remove and reciprocal cross misloading are put, and are connected to this convergent-divergent synchronizer and this apparatus for temporary storage, with carry out three-dimensional luminance and chrominance separation, noise remove, and the reciprocal cross Wrong Shipment calculate, and produce the picture frame signal.
2. the wrong system of the decoding of CVBS signal according to claim 1 and reciprocal cross also comprises:
Analog-digital commutator, it receives simulation CVBS signal, to this CVBS sample of signal and convert digital form to, and produces this sampling CVBS signal.
3. the wrong system of the decoding of CVBS signal according to claim 1 and reciprocal cross, wherein the horizontal blanking in the CVBS signal that also will take a sample of this convergent-divergent synchronizer and the pixel of vertical blanking remove.
4. according to claim 2 or 3 described decodings and the wrong system of reciprocal cross, wherein, this three-dimensional luminance and chrominance separation, noise remove and reciprocal cross misloading are put and are comprised:
Three-dimensional luminance and aberration separator, be connected to this convergent-divergent synchronizer and this apparatus for temporary storage, receive this synchronous CVBS signal of this convergent-divergent synchronizer output, this synchronous two-dimentional color difference signal, and be stored in the first preamble CVBS signal of this apparatus for temporary storage, be stored in the first preamble two dimension color difference signal of this apparatus for temporary storage, and this synchronous CVBS signal carried out three-dimensional luminance and aberration separation algorithm, to produce the three-dimensional luminance signal, reach this synchronous two-dimentional color difference signal and the first preamble two dimension color difference signal that is stored in this apparatus for temporary storage are averaged computing to produce three-dimensional color difference signal, this convergent-divergent synchronizer also should be stored in this apparatus for temporary storage by synchronous CVBS signal simultaneously;
Mixing arrangement, be connected to this convergent-divergent synchronizer and this three-dimensional luminance and aberration separator, according to the moving ratio signal, so that this synchronous two-dimentional luminance signal, this synchronous two-dimentional color difference signal, this three-dimensional luminance signal and this three-dimensional color difference signal are mixed, to produce vision-mix field picture signal;
The noise remove device, be connected to this mixing arrangement and this apparatus for temporary storage, according to this vision-mix field picture signal of this mixing arrangement output, and the previous vision-mix field picture signal that stores of this apparatus for temporary storage, carry out the noise remove computing, to produce denoising picture field picture signal; And
The reciprocal cross misloading is put, be connected to this three-dimensional luminance and aberration separator, this noise remove device and this apparatus for temporary storage, according to this denoising picture field picture signal of this noise remove device output, and the previous denoising picture field picture signal that stores of this apparatus for temporary storage, carry out the reciprocal cross Wrong Shipment and calculate, to produce the wrong picture frame picture signal of reciprocal cross.
5. the wrong system of the decoding of CVBS signal according to claim 4 and reciprocal cross, wherein, this three-dimensional luminance and aberration separator comprise:
Motion detection device is connected to this convergent-divergent synchronizer and this noise remove and reciprocal cross misloading and puts, according to this synchronous CVBS signal, this three-dimensional luminance signal and this three-dimensional color difference signal of this convergent-divergent synchronizer output, to produce this moving ratio signal.
6. the wrong system of the decoding of CVBS signal according to claim 5 and reciprocal cross, wherein, this reciprocal cross misloading is put according to this moving ratio signal, this denoising picture field picture signal, is reached this previous denoising picture field picture signal, calculates to carry out the reciprocal cross Wrong Shipment.
7. the wrong system of the decoding of CVBS signal according to claim 6 and reciprocal cross, it also comprises:
Line buffer, it is connected to this analogsimulation digital switching device and this two dimension brightness and tone separation apparatus, with temporary this sampling CVBS signal.
8. the wrong system of the decoding of CVBS signal according to claim 7 and reciprocal cross, its this line buffer and this apparatus for temporary storage system are integrated in the single memory.
9. the decoding of a CVBS signal and deinterleaving method comprise the following step:
(A) receive sampling CVBS signal, this sampling CVBS signal system is corresponding to a figure picture field picture signal;
(B) use two-dimentional brightness and tone separation apparatus with by separation in this sampling CVBS signal and produce two-dimentional luminance signal and two-dimensional chromaticity signal;
(C) use colourity to the aberration conversion equipment to convert this two-dimensional chromaticity signal (2DC4) to two-dimentional color difference signal;
(D) use the convergent-divergent synchronizer respectively this sampling CVBS signal, this two dimension luminance signal and this two dimension color difference signal being carried out synchronous computing, and produce synchronous CVBS signal, synchronous two-dimentional luminance signal, synchronous two-dimentional color difference signal respectively;
(E) use three-dimensional luminance and aberration separator and according to this synchronous CVBS signal, this synchronous two-dimentional color difference signal, reach first preamble CVBS signal, this synchronous CVBS signal is carried out three-dimensional luminance and aberration separation algorithm, separate and generation three-dimensional luminance signal and three-dimensional color difference signal;
(F) use mixing arrangement according to the moving ratio signal, so that this synchronous two-dimentional luminance signal, this synchronous two-dimentional color difference signal, this three-dimensional luminance signal and this three-dimensional color difference signal are mixed, to produce vision-mix field picture signal;
(G) use the noise remove device according to this vision-mix field picture signal, and previous vision-mix field picture signal, carry out the noise remove computing, to produce denoising picture field picture signal; And
(H) use the reciprocal cross misloading to put,, carry out the reciprocal cross Wrong Shipment and calculate, to produce the wrong picture frame picture signal of reciprocal cross according to this denoising picture field picture signal, and previous denoising picture field picture signal.
10. the decoding of CVBS signal according to claim 9 and deinterleaving method, wherein step (A) comprising:
(A1) use the analogsimulation digital switching device, receiving simulation CVBS signal, and to this CVBS sample of signal and convert digital form to, and produce the CVBS signal of this sampling.
11. the decoding of CVBS signal according to claim 10 and deinterleaving method, wherein step (E) comprising:
(E1) use motion detection device, according to this synchronous CVBS signal, this three-dimensional luminance signal and this three-dimensional color difference signal, to produce this moving ratio signal.
12. the decoding of CVBS signal according to claim 11 and deinterleaving method, wherein, step (A) is to receive Fi+4 figure sampling CVBS signal, this two dimension brightness in the step (B) and tone separation apparatus are to separate in the sampling CVBS signal by this Fi+4 figure field and to produce this Fi+4 figure two-dimentional luminance signal and two-dimensional chromaticity signal, and wherein i is an integer.
13. the decoding of CVBS signal according to claim 11 and deinterleaving method, wherein, colourity in the step (C) becomes this Fi+4 figure two-dimentional color difference signal to this Fi+4 figure two-dimensional chromaticity conversion of signals to the aberration conversion equipment, this convergent-divergent synchronizer in the step (D) carries out synchronous computing to two-dimentional luminance signal and this two-dimensional chromaticity signal of this Fi+4 figure CVBS signal, this Fi+4 figure respectively, and produces the synchronous two-dimensional chromaticity signal of the synchronous two-dimentional luminance signal, this Fi+4 figure of this Fi+4 figure synchronous CVBS signal, this Fi+4 figure respectively.
14. the decoding of CVBS signal according to claim 13 and deinterleaving method, wherein, this three-dimensional luminance in the step (E) and aberration separator be by this Fi+4 figure synchronous CVBS signal, and previous Fi+0 figure synchronous CVBS signal, separates and produce this Fi+4 figure three-dimensional luminance signal and three-dimensional color difference signal.
15. the decoding of CVBS signal according to claim 14 and deinterleaving method, wherein, this mixing arrangement in the step (F) is according to this moving ratio signal, mix with this synchronous two-dimentional luminance signal and this synchronous two-dimensional chromaticity signal of this Fi+4 being schemed the field, this three-dimensional luminance signal and this three-dimensional color difference signal that reaches this Fi+4 figure field, to produce the vision-mix field picture signal that this Fi+4 schemes the field.
16. the decoding of CVBS signal according to claim 15 and deinterleaving method, wherein, this noise remove device in the step (G) is according to this vision-mix field picture signal of this Fi+4 figure, and previous Fi+2 figure denoising picture field picture signal, carry out the noise remove computing, to produce the denoising picture field picture signal of this Fi+4 figure field.
17. the decoding of CVBS signal according to claim 16 and deinterleaving method, wherein, in step (H), this reciprocal cross misloading is put the denoising picture field picture signal of this denoising picture field picture signal according to this Fi+4 figure, previous Fi+3 figure field and previous Fi+2 figure denoising picture field picture signal, carry out the reciprocal cross Wrong Shipment and calculate, to produce the wrong picture frame picture signal of reciprocal cross of this Fi+3 figure field.
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