CN101540849A - Device for decoding analog video and converting interlaced into non-interlaced for motion adaptive resource sharing - Google Patents

Abstract

The invention relates to a device for decoding an analog video and converting interlaced into non-interlaced for motion adaptive resource sharing, which comprises a video input preprocessing unit, a component video/composite video/S-video signal synchronization module, a component video/composite video/S-video signal line-field delay line set, a two-dimensional/three-dimensional dynamic noise reduction unit, a video content adaptive motion detector, a memory module and a corresponding read-write controller, a two-dimensional adaptive comb filter unit, a content/motion quantity adaptive three-dimensional comb filter and a chroma demodulation unit, a P1 field oblique angle interpolation module, and a motion adaptive interlaced to non-interlaced unit. The device not only can ensure the high-degree detail and the fidelity of motion images, but also can ensure the complete chroma separation of still images; besides, the device can perform convenient and independent configuration on each module.

Description

The analog video decoder and the converting interlaced into non-interlaced of Motion Adaptive resource-sharing are put

Technical field

The analog video decoder and the converting interlaced into non-interlaced that the present invention relates to a kind of Motion Adaptive resource-sharing are put, and especially a kind of being applicable in the equipment such as television receiver, video playback based on the analog video decoder and the converting interlaced into non-interlaced of the Motion Adaptive resource-sharing of the signature analysis of video time domain spatial domain put.

Background technology

Be superimposed upon on the luminance channel after traditional analog composite video signal is modulated chrominance information and propagate/broadcast, and because the TV tech early stage of development is to the assignment constraint of channel width, therefore vision signal is transmitted in the mode (60 or 50 hertz of field frequencies) of interlacing, receiving terminal carries out light tone by processing such as filtering to be separated, for example our present employed television receiver just is mainly used in the processing of carrying out this respect, and interlace signal need be converted to the progressive-scan format (being generally 60 hertz of frame frequencies) that the main flow display device can receive.In the current main-stream product, often utilize two dimension or three-dimensional filter that analog composite video signal is carried out light tone and separate, then decoded interlaced video signal is sent into special converting interlaced into non-interlaced and put and convert progressive format to.Like this concerning whole system, the composite video decoder is in order to realize better light tone separating effect, often to better decode by the redundant information of two dimension or three-dimensional, adopt row/field memory that composite video is stored with regard to needs like this, and as three-dimensional dressing filter, also to calculate time corresponding similarity (motion detection), whether can adopt the optimization light tone of three-dimensional to separate in order to judgement; And put for converting interlaced into non-interlaced, in order to obtain video more true to nature, avoid the sawtooth defective on image detail border, need utilize the redundant information on time and the space to carry out corresponding interpolation, therefore also need the delay of capable field of to data message, in this simultaneously, for the correct interpolation of carrying out, with the similar calculating time corresponding similarity (motion detection) that needs in the three-dimensional dressing filtering.And in the present main flow Video processing product, composite video decoding and interlacing change line by line generally all conducts independently module realize, therefore the row of data message postpones a amount of exercise that storage and composite video decoding and converting interlaced into non-interlaced put and detects and need employing two to overlap independently logical course to realize that its cost and complexity are all than higher.

The present invention introduces a kind of composite video decoding and interlacing commentaries on classics device line by line of Motion Adaptive resource-sharing of high-performance and low-cost.Make composite video decoder and converting interlaced into non-interlaced put and share row delay stored logic and motion detection logic, reduced the complexity that hardware is realized and used, also make signal the seamless of information in the entire process process share, reduce the noise scale-up problem that exists in the serial process.Meanwhile, this device can also be configured to the operational mode of traditional independent composite video decoder, and the light tone component after light tone is separated is exported with the interlacing form; Perhaps input signal is the component signal of interlacing, finishes the conversion that is interlaced to progressive through this device.

Summary of the invention

The objective of the invention is at existing analog composite video signal decoder and the video converting interlaced into non-interlaced system configuration complexity in the product of buying property, logic redundancy and the not enough problem of compact degree, a kind of composite video decoding and interlacing commentaries on classics device and processing method line by line of Motion Adaptive resource-sharing are proposed, can finish the decoding of composite video signal and the interlacing of video more in high quality changes function line by line, has more high reliability and lower complexity in the application.

For achieving the above object, the invention provides a kind of composite video decoding and interlacing commentaries on classics device line by line of Motion Adaptive resource-sharing, comprising:

Video input pretreatment unit, be used for the vision signal under the unlike signal form is incorporated into the data buffer zone of first-in first-out (FIFO) from each road analog-digital commutator, and guarantee under stable system clock, at the uniform velocity to adopt the integrality of signal, signal from the resample system works clock rate of standard of crystal oscillator clock, is handled for the subsequent treatment module;

Component vide/composite video/S-video signal Synchronization module, this module is handled video input pretreatment unit output signal, seek row, field sync signal and the composite video signal of vision signal and the color carrier synchronizing signal among the S-Video, determine a row form of input signal by the row field signal phase-locked loop circuit, and adopt the color carrier phase-locked loop that the color carrier component among composite video signal and the S-Video is carried out synchronously, corresponding demodulated reference signal is provided.A row format signal will help the arrangement of each signal in the subsequent rows field signal delay line group; The burst signal phase-locked loop also provides relative time clock more accurately for system.Certainly this synchronization module also is responsible for non-standard signal, and as signal, the strong noise broadcast singal of magnetic tape station, the signal under the situations such as no input signal is corrected, and anti-deadlock synchronizing signal is provided;

Component vide/composite video/S-video signal rows field delay line group, the outputting video signal that this module is imported video pretreatment unit according to the capable field synchronization information that provides in component vide/composite video/S-video signal Synchronization module takes out from FIFO and memory and is aligned in the row delay line group, a row delay line group is that a series of data storage cells are formed, and reads and writes according to the read-write operation of the memory cell of standard; In this simultaneously, this row field delay line group is also accepted the light tone separation signal finished from the composite video decoder decode;

Two-dimensional/three-dimensional DNR dynamic noise reduction unit, this module detects by the content to aligned signal in the delay line of vision signal row field, distinguishes spatial domain (two dimension) and the noise of time-domain (three-dimensional) and the details of video itself, carries out noise reduction; This module need be used the video content adaptive motion detector and obtain amount of exercise, prevents because three-dimensional noise reduction causes the conditions of streaking of sport video.Also to prevent simultaneously because the video loss in detail that two-dimentional noise reduction causes in this;

The video content adaptive motion detector, whether this module has motion to be used to judge the motion feature of video content on time-domain by calculating vision signal (component vide/composite video/S-video signal) in component vide/composite video/S-video signal rows field delay line group, judges that the amount of exercise that obtains offers Three-Dimensional Dynamic noise reduction unit, content/amount of exercise self-adaptation three-dimensional comb filtering and chrominance demodulation unit and Motion Adaptive interlacing respectively and changes line by line the unit as control signal;

Memory, be used for vision signal and detected amount of exercise signal that storage pad postpones, the field inhibit signal is used to offer component vide/composite video/S-video signal rows field delay line group, and the amount of exercise signal of depositing is used to remove the current detection error that causes because of rapid movement;

Two-dimensional adaptive dressing filter cell, by detecting the correlation on the video image space, seek optimum light tone separate object about current sampling point and in the sampling point of the left and right sides, its light tone that is mainly used in the video content of handling rapid movement is separated, and the similarity information that provides two-dimensional directional for three-dimensional adaptive dressing filtering as a reference.

Content/amount of exercise self-adaptation three-dimensional comb filtering and chrominance demodulation unit, the two-dimensional directional similarity information that amount of exercise information that this module provides according to the video content adaptive motion detector and two-dimensional adaptive Interleaver Unit provide, can judgement adopt the dressing filtering result of three-dimensional, and obtain final three-dimensional adaptive comb filtering light tone component by fuzzy judgment; By demodulation, obtain blue difference Cb and red poor Cr chromatic component, and give converting interlaced into non-interlaced and put chromatic component;

Two contents of going images obtained to prolong the interpolation result (reducing the sawtooth mistake) of image edge direction about oblique angle, P1 field interpolating module, this module needed interpolation point by the calculating interlaced video signal; The input signal of oblique angle interpolation can be the component signal from content/amount of exercise self-adaptation three-dimensional comb filtering and the acquisition of chrominance demodulation unit, also can be the component signal of directly sending into from the system outside.

Unit (De-interlacing) line by line changeed in the Motion Adaptive interlacing, the amount of exercise information decision that this module provides according to the video content adaptive motion detector slotting video sampling point adopt corresponding points in front/rear one to obtain or adopt the result of oblique angle, P1 field interpolating module two-dimensional interpolation to obtain; In general, if current point is positioned at the moving image zone, amount of exercise is bigger, then adopt the result of oblique angle, P1 field interpolating module two-dimensional interpolation, otherwise if amount of exercise is zero, a corresponding points is used as the value of current point before and after then adopting, if in the middle of being in, then adopt the fuzzy logic mode to adjudicate; Obtain component video signal line by line at last;

Described video input pretreatment unit also comprises the self adaptation adjustment to detection, routing and the range of signal of unlike signal input signal pattern, for example input signal when very little, need be zoomed into the data area that the back-end processing unit can be admitted at analog domain or numeric field with signal.Simultaneously described video input pretreatment unit is also adjusted the sample rate of data according to the component vide/composite video/error signal of the color carrier phase-locked loop that S-video signal Synchronization module provides and the feedback information of Clamping loop, thereby makes that the video data rate that obtains is a reference format.

Described component vide/composite video/S-video signal Synchronization module can adopt the partial logic of sharing under component vide and composite video situation, for example capable field synchronization logic.

Described two-dimensional/three-dimensional DNR dynamic noise reduction unit carries out noise reduction process respectively to each component when component signal is imported; Situation for the composite video signal input is then carried out noise reduction to composite video signal, and for S-Video, luminance component and modulation colouring component is carried out noise reduction respectively.

Motion detection in the described video content adaptive motion detector mainly based on signal be divided into two kinds of big types, first kind for composite video signal, amount of exercise detects and mainly carries out based on homophase cvbs signal, for example for the TSC-system formula, data point B_cvbs (n) and data point D_cvbs (n) same-phase, amount of exercise produce (certainly also will by the CVBS of B and C through the result of low-pass filtering as a reference) between these 2 signals; Second for component signal and S=Video, and momental detection is mainly carried out on luminance channel, and chrominance channel just as a reference.

Described two-dimensional adaptive dressing filter cell and described content/amount of exercise self-adaptation three-dimensional comb filtering and chrominance demodulation unit constitute the three-dimensional comb filter of a Motion Adaptive, from composite video signal, isolate light tone and chromatic component, its judging process gives also that fuzzy logic carries out, and therefore can overcome the switching noise influence.

Oblique angle, described P1 field interpolating module can adopt different interpolation angle numbers according to the requirement of system design in reality realizes, thereby at different application requirements.

Described Motion Adaptive interlacing is changeed the pulldown that also comprises in the unit line by line under the film mode and is handled, also promptly line by line moving-picture frame recover to handle.

Therefore, the analog video decoder and the converting interlaced into non-interlaced of Motion Adaptive resource-sharing that the present invention is based on the signature analysis of video time domain spatial domain put, according to different video signal pattern of the input, under same set of hardware signal checkout gear, finish detection to video motion amount and space similarity, finish three-dimensional motion auto-adaptive comb filter and the interlacing of three-dimensional motion amount self adaptation and change the function of handling line by line, and adopt based on fuzzy logic algorithm, the central all kinds such as static of practical application both can have been guaranteed, slow motion, the rapid movement image changes high degree of detail maintenance in the processing procedure line by line in decoding and interlacing, can guarantee that again the bright color crosstalk mistake of sawtooth and comb filtering does not appear in moving image.Crucial more is that this invention can be accomplished the resource-sharing on the same set of hardware logic basis, has reduced system cost; Simultaneously, three-dimensional motion self-adapting comb filtering and the interlacing of three-dimensional motion self adaptation are changeed the independent adjustment of handling every index line by line, 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 puts system block diagram for the analog video decoder and the converting interlaced into non-interlaced of Motion Adaptive resource-sharing of the present invention.

Fig. 2 is the sampling point distribution map behind descending delay line of the various signal formats of vision signal of the present invention.

Fig. 3 is memory external data read-write interface figure of the present invention.

Fig. 4 is sampling point distribution map on the space in oblique angle, the P1 of the present invention field interpolating module.

Embodiment

The present invention is according to different video signal pattern of the input, under same set of hardware signal checkout gear, finish detection to video motion amount and space similarity, finishing three-dimensional motion auto-adaptive comb filter and the interlacing of three-dimensional motion amount self adaptation changes the function of handling line by line, obtain that standard display device can discern line by line or interlacing high-quality component signal.The analog video decoder of Motion Adaptive resource-sharing of the present invention and converting interlaced into non-interlaced are put especially in the consumer electronics video of having relatively high expectations for picture quality interlaced video in the progressive conversion, both can guarantee that static, slow motion, rapid movement image changeed high degree of detail in the processing procedure line by line in decoding and interlacing, can guarantee that again the bright color crosstalk mistake of sawtooth and comb filtering does not appear in moving image, and can make things convenient for the high performance-price ratio motion adaptive video interlacing of configuration to change method line by line to the user.Be specially adapted to equipment such as television receiver, video playback.

As shown in Figure 1, the analog video decoder of Motion Adaptive resource-sharing of the present invention and converting interlaced into non-interlaced are put and are comprised: video input pretreatment unit 1; Component vide/composite video/S-video signal Synchronization module 2 carries out signal format detection according to the output signal of unit 1, and output detection information; Component vide/composite video/S-video signal rows field delay line group 3 receives the detection information that component vide/composite video/S-video signal Synchronization module 2 provides; Two-dimensional/three-dimensional DNR dynamic noise reduction unit 4 carries out basic vision signal noise reduction and preliminary treatment; Video content adaptive motion detector 5 provides amount of exercise information; Memory 6 is responsible for the access and the read-write of video data and amount of exercise signal; Two-dimensional adaptive dressing filter cell 7 obtains the optimization solution that the spatial domain light tone is separated by the spatial domain correlation detection; Content/amount of exercise self-adaptation three-dimensional comb filtering and chrominance demodulation unit 8, the amount of exercise information that provides according to video content adaptive motion detector 5, adopt the fuzzy judgment mode to determine the adaptive comb filtering result of three-dimensional motion amount, the demodulation of the circumstances in which people get things ready for a trip of going forward side by side degree component; Oblique angle, P1 field interpolating module 9 carries out interpolation according to the vision signal spatial coherence according to angle direction, to reduce the sawtooth of moving image; Unit (De-interlacing) 10 line by line changeed in the Motion Adaptive interlacing, according to the amount of exercise information that video content adaptive motion detector 5 provides, carries out Motion Adaptive interlacing commentaries on classics signal processing line by line, thereby obtains the progressive video signal output of standard.

Video input pretreatment unit 1 is used for the vision signal under the unlike signal form is incorporated into the data buffer zone of first-in first-out (FIFO) from each road analog-digital commutator, and guarantees at the uniform velocity to adopt under stable system clock the integrality of signal.Here the signal that can discern comprises composite video signal cvbs, S-video signal, and three road component signal YpbPr.Under the system clock that same clock generator provides, there is first-in first-out (FIFO) system in the digital signal that analog to digital converter obtains.Multipole filters is used for from the conversion of system's absolute clock to the standard phase-locked clock.For analog composite video signal and S-video signal, system often with the color carrier phase-locked loop as standard phase-locked clock generator, for component signal, often adopt the phase line lock ring as standard phase-locked clock generator, therefore, video input pretreatment unit 1 is formed the reponse system of a closed loop with component vide/composite video/S-video signal Synchronization module 2.

Component vide/composite video/S-video signal Synchronization module 2, handle according to video preprocessor processing unit 1 output signal, and therefrom seek row, field sync signal and the composite video signal of vision signal and the color carrier synchronizing signal among the S-Video, determine a row form of input signal by the row field signal phase-locked loop circuit, and adopt the color carrier phase-locked loop that the color carrier component among composite video signal and the S-Video is carried out synchronously, corresponding demodulated reference signal is provided.A row format signal will help the arrangement of each signal in the subsequent rows field signal delay line group; The burst signal phase-locked loop also provides relative time clock more accurately for system, therefore is called as standard phase-locked clock generator.For the extraction of line synchronizing signal and field sync signal, finish by the phase line lock ring and the field synchronization phase-locked loop of correspondence too, just export different excitations with positive at the varying input signal form according to different systems.The capable field synchronization of analog composite video signal and S-video clock is the most accurately provided by the burst signal phase-locked loop, system's accurate clock of component signal is then mainly provided by line synchronizing signal, different for the sync waveform of SD signal and high-definition signal, the coherent detection of Synchronous Processing is also different; For non-standard signal, as signal, strong noise broadcast singal that the magnetic tape station F.F. is put slowly and suspended, the signal under the situations such as no input signal is discerned and is corrected, and anti-deadlock synchronizing signal is provided.

Component vide/composite video/S-video signal rows field delay line group 3, the outputting video signal that pretreatment unit is provided video according to the capable field synchronization information that provides in component vide/composite video/S-video signal Synchronization module takes out from video input pretreatment unit 1FIFO and memory and is aligned in the row delay line group.A row delay line group is that a series of data storage cells are formed, reads and writes according to the read-write operation of the memory cell of standard, for example, the TSC-system formula.System adopts 2 times of (2X) sample rates, and every capable video has 1716 sampling points, and strange is 263 row, and there are 262 row the idol field, approximate 60 hertz of field frequency; And pal mode under 2 times of (2X) sample rates equally, every capable video has 1728 sampling points, and strange is 313 row, and there are 312 row the idol field, approximate 50 hertz of field frequency.For convenience of description, for the current some signal indication of composite video signal when the front court is B_cvbs (n), signal in the present frame in the adjacent row data buffering is expressed as B_top2_cvbs (n) respectively, B_top1_cvbs1 (n), B_bot1 (n), B_bot2 (n), the data in the corresponding current line buffering of several frames in front are expressed as C_cvbs (n), D_cvbs (n), E_cvbs (n) ... etc.; For component signal, need store respectively and read-write operation three road signals, be shown as B_Luma (n) for the bright signal decibel meter in the current line buffering, B_CbCr (n), when up-downgoing corresponding points in front court are expressed as X_top_Luma (n) respectively, X_top_CbCr (n), X_bot_Luma (n), X_bot_CbCr (n), the component of front one frame corresponding points is expressed as C_Luma (n), C_CbCr (n); Need to prove, read-write control for external memory storage, often to consider that other port is to the scheduling of the read write command of memory in the whole system, therefore often need a unified Memory Controller to realize, the analog video decoder of Motion Adaptive resource-sharing of the present invention and converting interlaced into non-interlaced are put by sharing hardware logic, therefore effectively reduce bandwidth requirement, make whole system be easy to design more the memory read/write demand.

Two-dimensional/three-dimensional DNR dynamic noise reduction unit 4, detect by the content of aligned signal in the delay line of vision signal row field being carried out spatial coherence, and video content adaptive motion detector 5 provides the component motion of time-domain, thereby distinguish spatial domain (two dimension) and the noise of time-domain (three-dimensional) and the details of video itself, carry out noise reduction.This module need be used video content adaptive motion detector 5 and obtain amount of exercise, can prevent because because three-dimensional noise reduction causes the conditions of streaking of sport video; Meanwhile, can prevent because the video loss in detail that two-dimentional noise reduction causes by the spatial coherence detection; The vision signal that obtains behind the noise reduction is carried out corresponding comb filtering (light tone of analog composite video signal is separated decoding) and interlacing commentaries on classics signal processing line by line.

Video content adaptive motion detector 5, on time-domain, whether there is motion to be used to judge the motion feature of video content by calculating vision signal (component vide/composite video/S-video signal) in component vide/composite video/S-video signal rows field delay line group, judges that the amount of exercise that obtains offers Three-Dimensional Dynamic noise reduction unit 4, content/amount of exercise self-adaptation three-dimensional comb filtering and chrominance demodulation unit 8 and Motion Adaptive interlacing respectively and changes line by line unit 10 as control signal.The basic ideas of motion detection based on signal be divided into two kinds of big types: first kind for analog composite video signal CVBS, and amount of exercise detects and mainly carries out based on homophase cvbs signal.For example for the TSC-system formula, data point B_cvbs (n) and data point D_cvbs (n) same-phase, amount of exercise produces (certainly also will by the CVBS of B and C through the result of low-pass filtering as a reference) between these 2 signals.Again for example, according to basic difference component of the time-domain of vision signal such as low pass part absolute difference $\left\{\begin{array}{cc}{D}_{\mathrm{LP}}\left(n\right)={|C\_{\mathrm{cvbs}}_{\mathrm{LP}}\left(n\right)-B\_{\mathrm{cvbs}}_{\mathrm{LP}}\left(n\right)|}_{\mathrm{LPF}}& \mathrm{NTSC}\\ D_{\mathrm{LP}}\left(n\right)={|D\_{\mathrm{cvbs}}_{\mathrm{LP}}\left(n\right)-B\_{\mathrm{cvbs}}_{\mathrm{LP}}\left(n\right)|}_{\mathrm{LPF}}& \mathrm{PAL}\end{array}\right.,$

Amount of exercise error for high fdrequency component is defined as:

$\left\{\begin{array}{cc}{D}_{\mathrm{HP}}\left(n\right)=\min ({|C\_{\mathrm{cvbs}}_{\mathrm{HP}}\left(n\right)-B\_\mathrm{cvb}{s}_{\mathrm{HP}}\left(n\right)|}_{\mathrm{LP}},{|C\_{\mathrm{cvbs}}_{\mathrm{HP}}\left(n\right)-B\_{\mathrm{cvbs}}_{\mathrm{HP}}\left(n\right)|}_{\mathrm{LP}})& \mathrm{NTSC}\\ D_{\mathrm{HP}}\left(n\right)=\min ({|D\_{\mathrm{cvbs}}_{\mathrm{HP}}\left(n\right)-B\_{\mathrm{cvbs}}_{\mathrm{HP}}\left(n\right)|}_{\mathrm{LP}},{|D\_{\mathrm{cvbs}}_{\mathrm{HP}}\left(n\right)-B\_{\mathrm{cvbs}}_{\mathrm{HP}}\left(n\right)|}_{\mathrm{LP}})& \mathrm{PAL}\end{array}\right.$

The in-phase signal difference component:

$\left\{\begin{array}{c}\begin{array}{cc}{D}_{\mathrm{IN}}\left(n\right)={|D\_\mathrm{cvbs}\left(n\right)-B\_\mathrm{cvbs}\left(n\right)|}_{\mathrm{LPF}}& \mathrm{NTSC}\end{array}\\ D_{\mathrm{IN}}\left(n\right)=\left\{\begin{array}{c}\begin{array}{cc}{|D\_\mathrm{cvbs}\left(n\right)+B\_\mathrm{cvbs}\left(n\right)-C\_\mathrm{cvbs}\left(n\right)-E\_\mathrm{cvbs}\left(n\right)|}_{\mathrm{LPF}}& \mathrm{PAL}/\mathrm{PALM}/\mathrm{PALNc}\end{array}\\ \begin{array}{ccc}\mathrm{OR}& {|F\_\mathrm{cvbs}\left(n\right)-B\_\mathrm{cvbs}\left(n\right)|}_{\mathrm{LPF}}& \mathrm{PAL}/\mathrm{PALM}/\mathrm{PALNc}\end{array}\end{array}\right.\end{array}\right.$

According to signature analysis, calculate the parameter setting of corresponding each component, simultaneously as D to vision signal _LP(n), D _HP(n), D _IN(n) therefore weight coefficient can be understood as the parameter to video features

In general, these features mainly show as the luminance detail degree in the image, chrominance bandwidth, and global motion feature or the like, thus determined the value of each component weight coefficient; Finally draw the controlled quentity controlled variable that is used to determine the time-domain similarity---amount of exercise M _k ^#(n), for example a kind of simple definition mode is;

$M_k^{\#}\left(n\right)=\mathrm{\α}1\·(D_{\mathrm{LP}}\left(n\right)-\mathrm{\ϵ}1)+\mathrm{\α}2\·(D_{\mathrm{HP}}\left(n\right)-\mathrm{\ϵ}2)+\mathrm{\α}3\·(D_{\mathrm{IN}}\left(n\right)-\mathrm{\ϵ}3)$

Second for component signal and S=Video, momental detection is mainly carried out on luminance channel, and chrominance channel is as a reference, but the same with momental detection under the Analog Composite Video situation, the feature of video content be need consider, thereby corresponding weight coefficient α and ε determined;

$M_k^{*}\left(n\right)=\mathrm{\α}\·({|B\_\mathrm{luma}\left(n\right)-C\_\mathrm{luma}\left(n\right)|}_{\mathrm{LPF}}-\mathrm{\ϵ})$

Final amount of exercise is decided by:

$M_k^{\mathrm{ns}}\left(n\right)=f_1(M_k^{\#}\left(n\right),M_k^{*}\left(n\right))$ noise reduction

$M_k^{3\mathrm{Dcomb}}\left(n\right)=f_2(M_k^{\#}\left(n\right),M_k^{*}\left(n\right))$ 3D?comb

$M_k^{\mathrm{DI}}\left(n\right)=f_1(M_k^{\#}\left(n\right),M_k^{*}\left(n\right))$ De-int?erlacing

…

Memory 6, be used for vision signal and detected amount of exercise signal that storage pad postpones, the field inhibit signal is used to offer component vide/composite video/S-video signal rows field delay line group, and the amount of exercise signal of depositing is used to remove the current detection error that causes because of rapid movement.Often adopt outside standard memory in these memory physics realizations, and come and the collaborative work of chip internal logic by the memory read writing controller; In the practical application, the signal that obtains in the row buffering is written in the external memory storage, and from memory, the data of front corresponding fields and frame is read and put into row buffering by the memory read writing controller.For momental storage and read-write, also adopt the mode of similar video data to carry out.Memory external data read-write interface figure as shown in Figure 3: the memory write end is written to memory after composite video signal is postponed by row, and with brightness, the chrominance information B_Luma (n) in the current line buffering, B_CbCr (n) and amount of exercise information are written in the memory, these write operations are by read-write controller and memory communication, to guarantee the integrality of data; The other end of memory then takes out memory through vision signal and amount of exercise information that interlude postpones, be aligned in the corresponding line buffer, for respective modules used.

Two-dimensional adaptive dressing filter cell 7, by detecting the correlation on the video image space, B_top2_cvbs (n) about current sampling point, B_top1_cvbs1 (n), B_bot1 (n), B_bot2 (n), with the light tone separate object of seeking optimum among the left and right sides sampling point B_cvbs (n+k), its light tone that is mainly used in the video content of handling rapid movement is separated, according to different signaling mode (NTSC, PAL etc.) the similarity S between the adjacent spots (n) calculates that separates dressing filtering with light tone different, and the light tone separating resulting that still all will obtain correspondence is expressed as:

[Y _2D(n)，C _2D(n)]＝f _comb(B_cvbs(n)，B_top2_cvbs(n)，C(n)，...B_bot2_cvbs(n)，S _k(n))

Wherein, S (n)=f _Sim(S _k(n), ρ _k) the representation space similarity, ρ _kBe the attenuation coefficient on this direction.Attenuation coefficient ρ _kThe zone of depending on current sampling point, for example, 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; The similarity information that space similarity information S (n) provides two-dimensional directional for three-dimensional adaptive dressing filtering simultaneously as a reference.

Content/amount of exercise self-adaptation three-dimensional comb filtering and chrominance demodulation unit 8, brightness that three-dimensional comb filtering draws and chromatic component are:

$Y_{3D}=\left\{\begin{array}{cc}B\_\mathrm{cvbs}\left(n\right)+C\_\mathrm{cvbs}\left(n\right)& \mathrm{NTSC}\\ B\_\mathrm{cvbs}\left(n\right)+D\_\mathrm{cvbs}\left(n\right)& \mathrm{PAL}/\mathrm{PALM}/\mathrm{PALNc}\end{array}\right.$

$C_{3D}=\left\{\begin{array}{cc}B\_\mathrm{cvb}{s}_{\mathrm{HP}}\left(n\right)-C\_\mathrm{cvb}{s}_{\mathrm{HP}}\left(n\right)& \mathrm{NTSC}\\ B\_{\mathrm{cvbs}}_{\mathrm{HP}}\left(n\right)-D\_\mathrm{cvb}{s}_{\mathrm{HP}}& \mathrm{PAL}/\mathrm{PALM}/\mathrm{PALNc}\end{array}\right.$

The amount of exercise information M that provides according to the video content adaptive motion detector _k ^3Dcomb(n) and the two-dimensional directional similarity information S (n) that provides of two-dimensional adaptive Interleaver Unit, can judgement adopt the dressing filtering result of three-dimensional, and obtain final three-dimensional adaptive comb filtering light tone component by fuzzy judgment; For example, carry out the weighting reliability that two-dimentional fuzzy control calculates three-dimensional comb filtering and space filtering ${\mathrm{\λ}}_{3D}\left(n\right)=f_{\mathrm{fuzzy}/\mathrm{LUT}}(S\left(n\right),M_k^{3\mathrm{Dcomb}}\left(n\right)),$ 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 _adot(n)＝λ _3D(n)·C _3D(n)+(1-λ _3D(n))·C _2D(n)；

By demodulation to chromatic component, obtain blue difference Cb and red poor Cr chromatic component, and give converting interlaced into non-interlaced and put, the citation form of demodulation is $\begin{array}{c}\mathrm{Cb}\left(n\right)=\mathrm{LPF}(C_{\mathrm{adpt}}\left(n\right)\·\sin \left(\mathrm{\ωn}\right));\\ \mathrm{Cr}\left(n\right)=\mathrm{LPF}(C_{\mathrm{adpt}}\left(n\right)\·\cos \left(\mathrm{\ωn}\right));;\end{array}$

Oblique angle, P1 field interpolating module 9, as shown in Figure 4, two contents of going images obtained to prolong the interpolation result of image edge direction about this module needed interpolation point by the calculating interlaced video signal, can reduce the sawtooth mistake; The input signal of oblique angle interpolation can be the component signal from content/amount of exercise self-adaptation three-dimensional comb filtering and the acquisition of chrominance demodulation unit, also can be the component signal of directly sending into from the system outside.The oblique angle interpolating module mainly is the photorealism that obtains to have under the sport video content situation smooth edge.The oblique angle here detects the similarity of often passing through to calculate the brightness of all angles direction, and the detection information of this similarity is carried out asking extreme value [Y behind the horizontal filtering _Int(n), CbCr _Int(n)]=f _AI(X_top (n), X_bot (n), S _AI(k)); K represents all directions.Oblique angle, P1 field interpolating module can adopt different interpolation angle numbers according to the requirement of system design in reality realizes, thereby at different application requirements; In general, the angle number of interpolation is many more, to the small-angle boundaries go sawtooth effect just strong more, but the stability requirement that angle is detected is also high more, so system complexity is also high more.

Unit (De-interlacing) 10 line by line changeed in the Motion Adaptive interlacing, the amount of exercise information decision that this module provides according to the video content adaptive motion detector slotting video sampling point adopt corresponding points in front/rear one to obtain or adopt the result [Y of oblique angle, P1 field interpolating module two-dimensional interpolation _Int(n), CbCr _Int(n)] obtain; In general, if current point is positioned at the moving image zone, amount of exercise is bigger, then adopt the result of oblique angle, P1 field interpolating module two-dimensional interpolation, otherwise if amount of exercise is zero, a corresponding points is used as the value of current point before and after then adopting, if in the middle of being in, then adopt the fuzzy logic mode to adjudicate; Obtain component video signal line by line at last; Here fuzzy control quantity is mainly by amount of exercise M _k ^DI(n) angle similarity S and in the oblique angle interpolation _AI(k) decide: ${\mathrm{\λ}}_{\mathrm{DI}}\left(n\right)=f_{\mathrm{fuzzy}/\mathrm{LUT}}(S_{\mathrm{AI}}\left(n\right),M_k^{\mathrm{DI}}\left(n\right));$ This ambiguity function and S _AI(n) approximately be weak proportional relation, with M _k ^DI(n) be strong inverse relation, the result that final X is ordered is:

YCbCr _DI，adpt(n)＝λ _DI(n)·C_YCbCr(n)+(1-λ _DI(n))·YCbCr _int(n)；

The Motion Adaptive interlacing is changeed the pulldown that also comprises in the unit line by line under the film mode and is handled, also promptly line by line moving-picture frame recover to handle; At different standards (NTSC, PAL etc.), the pulldown processing mode under the different frame per second is different.

Therefore, the analog video decoder of Motion Adaptive resource-sharing of the present invention and converting interlaced into non-interlaced are put and implementation method, by separation to video content, comprise noise reduction to signal, signature analysis etc., under same set of hardware structure, realize decoding simultaneously to analog composite video signal, the progressive signal processing is changeed in interlacing, obtains the color video frequency image of high-quality, and does not increase any additional overhead; 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 (17)

1. the analog video decoder of Motion Adaptive resource-sharing and converting interlaced into non-interlaced are put, comprising:

Video input pretreatment unit, be used for the vision signal under the unlike signal form is incorporated into the data buffer zone of first-in first-out (FIFO) from each road analog-digital commutator, and signal from the resample system works clock rate of standard of crystal oscillator clock, is handled for the subsequent treatment module;

Component vide/composite video/S-video signal Synchronization module, to handling according to video preprocessor processing unit output signal, seek row, field sync signal and the composite video signal of vision signal and the color carrier synchronizing signal among the S-Video, determine a row form of input signal by the row field signal phase-locked loop circuit, and adopt the color carrier phase-locked loop that the color carrier component among composite video signal and the S-Video is carried out synchronously, corresponding demodulated reference signal is provided;

Component vide/composite video/S-video signal rows field delay line group, the outputting video signal of video being imported pretreatment unit according to the capable field synchronization information that provides in component vide/composite video/S-video signal Synchronization module takes out from FIFO and memory and is aligned in the row delay line group;

Two-dimensional/three-dimensional DNR dynamic noise reduction unit detects by the content to aligned signal in the delay line of vision signal row field, distinguishes spatial domain (two dimension) and the noise of time-domain (three-dimensional) and the details of video itself, carries out noise reduction;

The video content adaptive motion detector, whether component vide/composite video/S-video signal has motion to judge the motion feature of video content on time-domain in component vide/composite video/S-video signal rows field delay line group by calculating, and obtains the amount of exercise signal;

Memory, be used for vision signal and detected amount of exercise signal that storage pad postpones, the field inhibit signal is used to offer component vide/composite video/S-video signal rows field delay line group, and the amount of exercise signal of depositing is used to remove the current detection error that causes because of rapid movement;

Two-dimensional adaptive dressing filter cell by detecting the correlation on the video image space, is sought optimum light tone separate object, and two-dimensional directional similarity information can be provided about current sampling point and in the sampling point of the left and right sides;

Content/amount of exercise self-adaptation three-dimensional comb filtering and chrominance demodulation unit, the two-dimensional directional similarity information that amount of exercise information that provides according to the video content adaptive motion detector and two-dimensional adaptive Interleaver Unit provide, can judgement adopt the dressing filtering result of three-dimensional, and by the final three-dimensional adaptive comb filtering light tone component of fuzzy judgment acquisition, by demodulation to chromatic component, obtain blue difference Cb and red poor Cr chromatic component, and give converting interlaced into non-interlaced and put;

Oblique angle, P1 field interpolating module, by calculate interlaced video signal need interpolation point up and down the contents of two row images obtain to prolong the interpolation result of image edge direction; And

Unit (De-interlacing) line by line changeed in the Motion Adaptive interlacing, the amount of exercise information decision that provides according to the video content adaptive motion detector slotting video sampling point adopt corresponding points in front/rear one to obtain or adopt the result of oblique angle, P1 field interpolating module two-dimensional interpolation to obtain; Obtain component video signal line by line at last.

2. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 are put, described video input pretreatment unit guarantees at the uniform velocity to adopt the integrality of signal under stable system clock, signal from the resample system works clock rate of standard of crystal oscillator clock, is handled for the subsequent treatment module.

3. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 or 2 are put, and described video input pretreatment unit also comprises the self adaptation adjustment to detection, routing and the range of signal of unlike signal input signal pattern.

4. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 or 2 are put, described video input pretreatment unit is also adjusted the sample rate of data according to the component vide/composite video/error signal of the color carrier phase-locked loop that S-video signal Synchronization module provides and the feedback information of Clamping loop, thereby makes that the video data rate that obtains is a reference format.

5. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 are put, the burst signal phase-locked loop of described component vide/composite video/S-video signal Synchronization module also provides relative time clock more accurately for system, also non-standard signal can be corrected, and anti-deadlock synchronizing signal is provided.

6. put as the analog video decoder and the converting interlaced into non-interlaced of claim 1 or 5 described a kind of Motion Adaptive resource-sharings, described component vide/composite video/S-video signal Synchronization module can adopt the partial logic of sharing under component vide and composite video situation.

7. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 6 are put, and described shared partial logic is row field synchronization logic.

8. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 are put, and a described row delay line group is made up of a series of data storage cells, read and write according to the read-write operation of the memory cell of standard.

9. put as the analog video decoder and the converting interlaced into non-interlaced of claim 1 or 8 described a kind of Motion Adaptive resource-sharings, a described row delay line group is also accepted the light tone separation signal finished from the composite video decoder decode simultaneously.

10. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 are put, and described two-dimensional/three-dimensional DNR dynamic noise reduction unit carries out noise reduction process respectively to each component when component signal is imported; When composite video signal is imported, composite video signal is carried out noise reduction; And in S-Video signal when input, carried out noise reduction respectively to luminance component and modulation colouring component.

11. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 are put, described two-dimensional/three-dimensional DNR dynamic noise reduction unit obtains amount of exercise from the video content adaptive motion detector.

12. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 are put, motion detection in the described video content adaptive motion detector mainly based on signal mainly be divided into two types, first kind for composite video signal, and amount of exercise detects and mainly carries out based on homophase cvbs signal; Second kind for component signal and S-Video signal, and momental detection is mainly carried out on luminance channel.

13. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 are put, described two-dimensional adaptive dressing filter cell and described content/amount of exercise self-adaptation three-dimensional comb filtering and chrominance demodulation unit constitute the three-dimensional comb filter of a Motion Adaptive, isolate light tone and chromatic component from composite video signal, its judging process also gives fuzzy logic to carry out.

14. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 are put, the oblique angle interpolation input signal of oblique angle, described P1 field interpolating module can be the component signal from content/amount of exercise self-adaptation three-dimensional comb filtering and the acquisition of chrominance demodulation unit, also can be the component signal of directly sending into from the system outside.

15. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 14 are put, oblique angle, described P1 field interpolating module can adopt different interpolation angle numbers.

16. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 1 are put, if current point is positioned at the moving image zone, amount of exercise is bigger, the result of unit employing oblique angle, P1 field interpolating module two-dimensional interpolation is line by line changeed in then described Motion Adaptive interlacing, otherwise, if amount of exercise is zero, then described Motion Adaptive interlacing is changeed line by line, and the unit adopts a front and back corresponding points to be used as the value of current point, if in the middle of being in, then adopt the fuzzy logic mode to adjudicate.

17. the analog video decoder and the converting interlaced into non-interlaced of a kind of Motion Adaptive resource-sharing as claimed in claim 16 are put, described Motion Adaptive interlacing is changeed the moving-picture frame line by line that also comprises in the unit line by line under the film mode and is recovered to handle.

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