KR960039999A - Image Processing System for Ultra Low Speed Transmission - Google Patents

Image Processing System for Ultra Low Speed Transmission Download PDF

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Publication number
KR960039999A
KR960039999A KR1019950010589A KR19950010589A KR960039999A KR 960039999 A KR960039999 A KR 960039999A KR 1019950010589 A KR1019950010589 A KR 1019950010589A KR 19950010589 A KR19950010589 A KR 19950010589A KR 960039999 A KR960039999 A KR 960039999A
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South Korea
Prior art keywords
frame
motion
feature point
feature
frames
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KR1019950010589A
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Korean (ko)
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KR0171152B1 (en
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임종태
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배순훈
대우전자 주식회사
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Publication of KR960039999A publication Critical patent/KR960039999A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/136—Incoming video signal characteristics or properties
    • H04N19/137—Motion inside a coding unit, e.g. average field, frame or block difference
    • H04N19/139—Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods 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
    • H04N19/124—Quantisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • H04N19/423—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H04N19/51—Motion estimation or motion compensation
    • H04N19/55—Motion estimation with spatial constraints, e.g. at image or region borders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/625—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using discrete cosine transform [DCT]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/90—Methods 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
    • H04N19/91—Entropy coding, e.g. variable length coding [VLC] or arithmetic coding

Abstract

본 발명은 복호화된 프레임 신호 사이에 내삽되는 프레임 신호를 구현하여 초저속 전송에 알맞도록 부호화 및 복호화하는 영상처리 시스템에 관한 것으로, 이를 해결하기 위해 부호화장치에는 프레임 선택기를 통해 블럭단위로 부호화된 프레임만을 전송하면, 이를 수신한 복호기에서는 특징점 움직임 예측부를 근거로 프레임간에 내삽되는 프레임 신호를 복원함으로써 보다 효율적인 부호화 및 복호화를 수행할 수 있는 장점이 있다.The present invention relates to an image processing system which encodes and decodes a frame signal interpolated between decoded frame signals so as to be suitable for ultra low speed transmission. To solve this problem, an encoding apparatus includes a frame coded in units of blocks through a frame selector. If only the transmission is performed, the decoder having the advantage of this function can perform more efficient encoding and decoding by reconstructing a frame signal interpolated between frames based on the feature point motion predictor.

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.

제 3도는 본 발명에 대한 초저속 전송을 위한 영상 부호화 장치도, 제 4도는 본 발명에 대한 초저속 전송을 위한 영상 복호화 장치도, 제 5도는 제 4도의 특징점 움직임 예측부를 상세히 설명하기 위한 블럭도.FIG. 3 is a video encoding apparatus for ultra low speed transmission according to the present invention, FIG. 4 is a video decoding apparatus for ultra low speed transmission according to the present invention, and FIG. 5 is a block diagram for explaining the feature point motion predictor of FIG. 4 in detail. .

Claims (3)

프레임간의 차분신호를 구하는 감산기 (302), 이 차분신호를 DCT 계수로 변환하는 DCT (304), 이 DCT 계수를 양자화하는 양자화기 (306), 역양자화하는 역양자화기 (310), 역 DCT 하는 역 DCT(312), 움직임 예측부 (314), 프레임 메모리 (316), 엔트로티피 부호기 (316)를 구비됨과 더불어 일련의 영상 프레임들을 부호화 장치에 있어서 : 상기 입력되는 영상 프레임 신호중 블럭단위 움직임 보상에 따른 홀수번째 프레임만을 부호화가 수행되도록 상기 입력되는 프레임 신호를 단속하는 프레임 선택기 (300)로 구성됨을 특징으로 하는 초저속 전송을 위한 영상처리 시스템.A subtractor 302 for obtaining the difference signal between frames, a DCT 304 for converting the difference signal into DCT coefficients, a quantizer 306 for quantizing the DCT coefficients, an inverse quantizer 310 for inverse quantization, and an inverse DCT An inverse DCT 312, a motion predictor 314, a frame memory 316, and an entropy encoder 316, and a series of image frames in the encoding apparatus: block compensation of the input image frame signal And a frame selector (300) for intermitting the input frame signal so that only odd-numbered frames are encoded. 수신되는 신호를 복호하하는 엔트로피 복호화기 (410), 이 엔트로피복호화기 (410)의 출력 정보를 역양자화하는 역양자화기 (420), 역양자화된 변환 계수를 원래 신호로 복원하는 역 DCT (430), 이전 프레임을 저장하는 프레임 메모리 (450), 이전 프레임과 복원된 움직임 벡터들을 근거로 움직임을 보상하는 움직임 보상부 (460), 역 DCT된 데이타와 예측된 영상 프레임을 합치는 가산기를 구비하고 일련의 영상 프레임들을 복호화하는 장치에 있어서 ; 상기 프레임 메모리 (450)에서 복원된 이전 프레임과 상기 복호화기에 의해 복원되어 현재 입력되는 프레임을 근거로 상기 두 프레임 사이에 내삽되는 프레임을 예측하여 복원하는 특징점 움직임 예측부 (470) 와 ; 상기 특징점 움직임 예측부 (470)에서 제공되는 내삽 프레임과 상기 블럭 단위로 움직임이 보상된 프레임간의 디스플레이 순서를 재배열하는 프레임 레코더 (480)로 구성됨을 특징으로 하는 초저속 전송을 위한 영상처리 시스템.An entropy decoder 410 for decoding the received signal, an inverse quantizer 420 for dequantizing the output information of the entropy decoder 410, and an inverse DCT 430 for restoring the dequantized transform coefficients to the original signal ), A frame memory 450 for storing the previous frame, a motion compensator 460 for compensating for the motion based on the previous frame and the reconstructed motion vectors, and an adder for combining the inverse DCT data with the predicted image frame. An apparatus for decoding a series of image frames; A feature point motion predictor (470) for predicting and reconstructing a frame interpolated between the two frames based on a previous frame reconstructed in the frame memory (450) and a frame reconstructed by the decoder and currently input; And a frame recorder (480) for rearranging the display order between the interpolated frame provided by the feature point motion predictor (470) and the frame whose motion is compensated in units of blocks. 제 2항에 있어서, 상기 특징점 움직임 예측부 (470)는, 상기 프레임 메모리 (450)의 이전 프레임에 포함된 화소중 움직임을 나타낼 수 있는 복수개의 특징점들을 선택하는 특징점 선택단 (510)과, 상기 특징점 선택단 (510)에서 선택된 특징점들과 상기 프레임 메모리(450)의 이전 프레임 및 현재 복호화되어 입력되는 프레임을 근거로 내삽되는 프레임의 특징점에 대한 움직임 변위를 구하는 특징점 움직임 벡터 검출단 (520)과, 상기 특징점 움직임 벡터 검출단 (520)의 움직임 벡터들과 특징점 선택단 (510)에서 제공되는 특징점들을 근거로 특징점외의 비특징점에 대한 움직임 벡트들을 검출하는 비특징점 움직임 벡터 검출단 (530)과, 상기 비특징점 움직임 벡터 검출단 (530)에서 제공되는 움직임 벡터들을 프레임 메모리(450)에서 복원된 이전 프레임에 대응시켜 움직임이 보상된 내삽 프레임의 움직임 벡터를 구하고, 이 데이타를 프레임 레코더 (480)로 제공하는 움직임 보상단 (540)으로 구성됨을 특징으로 하는 초저속 전송을 위한 영상처리 시스템.3. The feature point selection stage 510 of claim 2, wherein the feature point motion predictor 470 selects a plurality of feature points that represent motion among pixels included in a previous frame of the frame memory 450; A feature point motion vector detector 520 for obtaining a motion displacement with respect to feature points of an interpolated frame based on the feature points selected by the feature point selector 510, the previous frame of the frame memory 450, and a frame currently decoded and inputted; A non-feature motion vector detector 530 which detects motion vectors for non-feature points other than the feature points based on the motion vectors of the feature point motion vector detector 520 and the feature points provided by the feature point selector 510; The motion vectors provided from the non-feature motion vector detection stage 530 correspond to previous frames reconstructed in the frame memory 450 Obtaining a motion vector of a current to be a compensated interpolated frame, the data, the image processing system of the second low-speed transmission as claimed consists of a motion compensation stage 540 that provides a frame recorder 480. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950010589A 1995-04-29 1995-04-29 Image processing system for very low-speed transmission KR0171152B1 (en)

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