KR960040021A - Image Processing System for Ultra Low Speed Transmission - Google Patents

Image Processing System for Ultra Low Speed Transmission Download PDF

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KR960040021A
KR960040021A KR1019950010587A KR19950010587A KR960040021A KR 960040021 A KR960040021 A KR 960040021A KR 1019950010587 A KR1019950010587 A KR 1019950010587A KR 19950010587 A KR19950010587 A KR 19950010587A KR 960040021 A KR960040021 A KR 960040021A
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frame
motion
stage
feature point
predictor
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KR100200225B1 (en
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임종태
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배순훈
대우전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/90Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/91Entropy coding, e.g. variable length coding [VLC] or arithmetic coding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/124Quantisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/42Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • H04N19/423Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H04N19/51Motion estimation or motion compensation
    • H04N19/513Processing of motion vectors
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H04N19/51Motion estimation or motion compensation
    • H04N19/577Motion compensation with bidirectional frame interpolation, i.e. using B-pictures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/625Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using discrete cosine transform [DCT]

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  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

본 발명은 초저속 전송에 알맞도록 부화하고 복호화하는 영상처리 시스템에 관한 것으로, 특징점에 의한 프렝미간의 움직임을 예측하고, 이 예측된 무직임 변위를 블럭단위 부호화에 의해 발생된 데이타와 함께 복호기로 전송하고, 이 전송된 데이타를 근거로 복호화함으로써 초저속 전송에 알맞는 부호화 및 복호화가 가능하다.The present invention relates to an image processing system that hatches and decodes for ultra-low speed transmission. The present invention relates to predicting the motion between dominemies by a feature point, and converts the predicted non-displacement displacement into a decoder together with data generated by block-by-block coding. By transmitting and decoding on the basis of the transmitted data, encoding and decoding suitable for ultra low speed transmission are possible.

Description

초저속 전송을 위한 영상처리 시스템Image Processing System for Ultra Low Speed Transmission

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 본 발명에 대한 초저속 전송을 위한 영상 부호화장치도, 제4도는 제3도의 특징점 움직임 예측부를 상세히 설명하기 위한 블럭도, 제5도는 발명에 대한 초저속 전송을 위한 영상 복호화장치도.FIG. 3 is a video encoding apparatus for ultra low speed transmission according to the present invention, FIG. 4 is a block diagram for explaining the feature point motion predictor of FIG. 3 in detail, and FIG. 5 is a video decoding apparatus for ultra low speed transmission according to the present invention.

Claims (7)

현프레임과 움직임이 보상된 프레임간의 차분을 구하는 감산기, 이 감산기의 차분신호에 대한 변환계수를 구하는 DCT, 이 DCT 계수를 양자화하는 양자화기, 역양자화하는 역양자화기, 가산기, 움직임 예측부 및 엔트로티피 부호기를 구비됨과 더불렁 일련의 영상 프레임들을 부화화 장치에 있어서 : 입력되는 영상 프레임의 홀수번째 프레임 신호는 블럭단위 방법으로 부호화가 수행되도록 하고, 짝수번째로 프레임 신호는 화소 단위로 움직임 보상을 이용하여 부호화를 수행되도록 상기 연속적으로 입력되는 프레임을 적응적으로 선택하는 선택기(100)와 ; 상기 선택기(100)의 동작에 의해 블럭단위에 의한 부호화 선택시, 상기 부호화기에서 복원된 프레임을 저장하는 제1프레임 메모리(116)와 ; 상기 복원된 프레임이 상기 제1프레임 메모리(116)에 저장되기 전 상기 제1프레임 메모리(116)에 저장되어 있던 프레임을 저장하는 제2프레임 메모리(118)와 ; 상기 선택기(100)의 동작에 의해 인터폴레이션에 의한 부호화 선택시, 현재 입력되는 프레임 신호와 상기 제1프레임 메모리(116)의 이전 프레임 및 상기 제2프레임 메모리 (118)의 이전 프레임 전번째 프레임을 근거로 움직임을 예측하고, 이 예측된 프레임 정보를 제공하는 특징점 움직임 예측부를 포함함을 특징으로 하는 초저속 전송을 위한 영상 처리 시스템.A subtractor for calculating the difference between the current frame and the frame whose motion is compensated for; a DCT for obtaining a transform coefficient for the difference signal of the subtractor; a quantizer for quantizing the DCT coefficient; an inverse quantizer for inverse quantization; an adder, a motion predictor, and an ent In an incubating apparatus having a loti coder and a further series of image frames: The odd-numbered frame signal of an input video frame is encoded in a block unit method, and the even-numbered frame signal is motion compensated in pixel units. A selector (100) for adaptively selecting the continuously input frames such that encoding is performed by using a? A first frame memory 116 for storing a frame reconstructed by the encoder when encoding is selected on a block basis by an operation of the selector 100; A second frame memory (118) for storing a frame stored in the first frame memory (116) before the restored frame is stored in the first frame memory (116); When encoding is selected by interpolation by the operation of the selector 100, a frame signal currently input, based on a previous frame of the first frame memory 116 and a previous frame of the previous frame of the second frame memory 118 And a feature point motion predictor for predicting the motion and providing the predicted frame information. 수신되는 양자화스텝 사이즈, 움직임 벡터등들을 복호화하는 엔트로피 복호화기와, 이 엔트로피 복호화기에서 제공되는 정보를 역양자화하는 역양자화기, 이 역양자화기에서 역양자와된 변환 계수를 복원하는 역 DCT, 이전 프레임과 복원된 움직임 벡터들을 근거로 움직임을 보상하는 움직임 보상부, 상기 역 DCT에서 복원된 데이타와 상기 움직임 보상부에서 예측된 영상 프레임을 가산하는 가산기를 구비하고 일련의 영상 프레임들을 복호화하는 장치에 있어서 ; 상기 복호화기에서 복원된 프레임을 저장하는 제3프레임 메모리(210)와 ; 상기 복원된 프레임이 상기 제3프레임 메모리(210)에 저장되기 전 상기 제3프레임 메모리(210)에 저장되어 있던 프레임을 저장하는 제4프레임 메모리(212)와 ; 상기 제3프레임 메모리(210)에서 복원된 이전 프레임과 상기 제4프레임 메모리(212)에서 복원된 이전 프레임의 전번째 프레임을 근거로 특징점에 대한 움직임 변위를 예측하여 원래의 프레임으로 복원하는 특징점 움직임 예측부(214)와 ; 상기 특징점 움직임 예측부(214)에서 복원된 프레임 및 상기 가산기(208)로부터 제공되는 프레임을 원래의 영상 신호로 디스플레이 될 수 있도록 재배열하는 프레임 디코더(216)를 포함함을 특징으로 하는 초저속 전송을 위한 영상처리 시스템.An entropy decoder that decodes the received quantization step size, motion vectors, etc., an inverse quantizer that inversely quantizes the information provided by the entropy decoder, an inverse DCT that restores transform coefficients dequantized by the inverse quantizer, and And a motion compensator for compensating motion based on the frame and the reconstructed motion vectors, and an adder for adding data reconstructed in the inverse DCT and an image frame predicted by the motion compensator, and decoding a series of image frames. In; A third frame memory 210 for storing the frame reconstructed by the decoder; A fourth frame memory (212) for storing a frame stored in the third frame memory (210) before the restored frame is stored in the third frame memory (210); Feature point movement for predicting a motion displacement with respect to a feature point on the basis of a previous frame restored in the third frame memory 210 and a previous frame restored in the fourth frame memory 212. Prediction unit 214; And a frame decoder 216 for rearranging the frame reconstructed by the feature point motion predictor 214 and the frame provided by the adder 208 to be displayed as an original video signal. Image processing system for. 제1항에 있어서, 상기 특징점 움직임 예측부(120)는, 상기 포워드 인터폴레이션된 프레임 신호를 구하는 제1움직임 예측단(122)과, 백워드 인터폴레이션된 프레임을 구하는 제2움직임 예측단(124)과, 상기 제1움직임 예측단(122)과 상기 제2움직임 예측단(124)에서 구한 프레임간의 평균되는 프레임 신호를 구하는 제3움직임 예측단(126)과, 상기 제 1,2,3,예측단(122) (124) (126)에서 구한 프레임들 중 노이즈 성분이 최저인 프레임 신호를 비교하는 프레임 비교기(128)를 포함함을 특징으로 하는 초저속 전송을 위한 영상처리 시스템.The method of claim 1, wherein the feature point motion predictor 120 comprises: a first motion predictor 122 for obtaining the forward interpolated frame signal, and a second motion predictor 124 for obtaining a backward interpolated frame; A third motion predictor 126 for obtaining an averaged frame signal between the frames obtained by the first motion predictor 122 and the second motion predictor 124, and the first, second, third, and predictive ends. And a frame comparator (128) for comparing the frame signal having the lowest noise component among the frames obtained in (124) and (126). 제3항에 있어서, 상기 제1움직임 예측단(122)은, 상기 제2프레임 메모리(118)의 프레임에 포함된 복수개의 특징점들을 선택하는 제1특징점 선택단(1221)과, 상기 제1특징점 선택단(1221)에서 선택된 특징점들과 상기 제1프레임 메모리(116)의 이전 프레임에 포함된 특징점들에 대한 한 세트의 움직임 벡터들을 구하는 제1움직임 벡터 검출단(1222)과, 상기 제1움직임 벡터 검출단(1222)의 움직임 벡터들과 상기 제1특징점 선택단(1221)에서 제공되는 특징점들을 근거로 특징점외의 비특징점에 대한 움직임 벡터들을 검출하는 제1비특징점 검출단(1223)과, 제1비특징점 검출단(1223)에서 제공되는 움직임 벡터들을 상기 제2프레임 메모리(118)에서 복원된 이전프레임의 전프레임에 대응시켜 움직임이 보상된 벡터를 구하는 제1움직임 보상단(1224)과, 상기 제1움직임 보상단(1224)에서 보상된 움직임 벡터와 상기 선택기(100)로부터 제공되는 현재 프레임을 근거로 신호대 잡음비(PSNR)을 계산하는 제1계산처리단(1225)을 포함함을 특징으로 하는 초저속 전송을 위한 영상처리 시스템.The method of claim 3, wherein the first motion predictor 122 includes a first feature point selector 1221 for selecting a plurality of feature points included in a frame of the second frame memory 118, and the first feature point. A first motion vector detection stage 1222 for obtaining a set of motion vectors for the feature points selected by the selection stage 1221 and the feature points included in the previous frame of the first frame memory 116, and the first motion A first non-feature point detection stage 1223 that detects motion vectors for non-feature points other than the feature points based on the motion vectors of the vector detector 1222 and the feature points provided by the first feature point selection stage 1221, and A first motion compensation stage 1224 for obtaining a motion compensated vector by matching the motion vectors provided from the first non-feature point detection stage 1223 to all frames of the previous frame reconstructed in the second frame memory 118; The first motion compensation stage 1224 Image processing for ultra-low-speed transmission, characterized in that it comprises a first calculation stage 1225 for calculating a signal-to-noise ratio (PSNR) based on the motion vector compensated by the < RTI ID = 0.0 > and < / RTI > system. 제3항에 있어서, 상기 제2움직임 예측단(124)은, 상기 제1프레임 메모리(116)의 이전 프레임에 포함된 복수개의 특징점들을 선택하는 제2특징점 선택단(1241)과, 상기 제2특징점 선택단(1241)에서 선택된 특징점들과 제2프레임 메모리(118)의 이전프레임의 전프레임에 포함된 특징점들에 대한 움직임 벡터들을 구하는 제2움직임 벡터 검출단(1242)과, 상기 제2움직임 벡터 검출단(1242)의 움직임 벡터들과 상기 제2특징점 선택단(1241)에서 제공되는 특징점들을 근거로 특징점외의 비특징점에 대한 움직임 벡터를 검출하는 제2비특징점 검출단(1243)과, 상기 제2비특징점 검출단(1243)에서 제공되는 움직임 벡터를 상기 제1프레임 메모리(116)에서 복원된 이전프레임에 대응시켜 움직임이 보상된 움직임 벡터를 구하는 제2움직임 보상단(1244)과, 상기 제2움직임 보상단(1244)에서 보상된 움직임 벡터와 상기 선택기(100)로부터 제공되는 현프레임을 근거로 신호대 잡음비를 계산하는 제2계산처리단(1245)을 포함함을 특징으로 하는 초저속 전송을 위한 영상처리 시스템.4. The second feature predictor 124 includes: a second feature point selector 1241 for selecting a plurality of feature points included in a previous frame of the first frame memory 116, and the second feature predictor 124. A second motion vector detection stage 1242 for obtaining motion vectors for the feature points selected at the feature point selection stage 1241 and the feature points included in the previous frame of the previous frame of the second frame memory 118, and the second movement. A second non-feature point detection stage 1243 that detects a motion vector for non-feature points other than the feature points based on the motion vectors of the vector detector 1242 and the feature points provided by the second feature point selection stage 1241, and A second motion compensation stage 1244 that obtains a motion vector whose motion is compensated by matching the motion vector provided from the second non-feature point detection stage 1243 to the previous frame reconstructed in the first frame memory 116, and To the second motion compensation group 1244. And a second calculation stage (1245) for calculating a signal-to-noise ratio based on the compensated motion vector and the current frame provided from the selector (100). 제3항에 있어서, 상기 제3움직임 예측단(126)은, 상기 제1움직임 예측단(122)의 제1움직임 보상단(1224)에서 제공되는 보상된 한 셋트에 대응되는 벡터와 제2움직임 예측단(124)의 제2움직임 보상단(1244)에서 제공되는 보상된 프레임에 대응되는 벡터들을 평균하는 평균값 처리단(1261)과, 상기 평균값 처리단(1261)에 의한 움직임 벡터과 상기 선택기(100)로부터 제공되는 현프레임을 근거로 신호대 잡음비(PSNR)을 계산하는 제3계산처리단(1261)으로 포함함을 특징으로 하는 초저속 전송을 위한 영상처리 시스템.The method of claim 3, wherein the third motion predictor 126 comprises a vector and a second motion corresponding to the compensated set provided by the first motion compensator 1224 of the first motion predictor 122. An average value processing stage 1261 for averaging vectors corresponding to the compensated frame provided by the second motion compensation stage 1244 of the prediction stage 124, a motion vector and the selector 100 by the average value processing stage 1261. And a third calculation stage (1261) for calculating a signal-to-noise ratio (PSNR) based on the current frame provided by the C-type. 제3항에 있어서, 상기 프레임 비교기(128)은, 상기 제 1,2,3 예측단(122) (124) (126)에서 각각 제공되는 움직임 벡터에 대응되는 프레임들을 비교하여 최소의 잡음비를 갖는 프레임의 움직임 벡터를 선택함을 포함함을 특징으로 하는 초저속 전송을 위한 영상처리 시스템.The apparatus of claim 3, wherein the frame comparator 128 compares the frames corresponding to the motion vectors provided by the first, second, and third prediction stages 122, 124, and 126, respectively, and has a minimum noise ratio. And a motion vector of the frame. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
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