KR940013201A - Image compression coding apparatus and method - Google Patents

Image compression coding apparatus and method Download PDF

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Publication number
KR940013201A
KR940013201A KR1019920021135A KR920021135A KR940013201A KR 940013201 A KR940013201 A KR 940013201A KR 1019920021135 A KR1019920021135 A KR 1019920021135A KR 920021135 A KR920021135 A KR 920021135A KR 940013201 A KR940013201 A KR 940013201A
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South Korea
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prediction error
output
data
block
video
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KR1019920021135A
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Korean (ko)
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KR950005624B1 (en
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최건영
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정용문
삼성전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/14Systems for two-way working
    • 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
    • H04N19/169Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/176Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/14Systems for two-way working
    • H04N7/15Conference systems

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

영상 전화기나 화상회의 시스템과 같은 영상처리 시스템의 영상 압축 부호화 장치 및 방법에 관한 것으로, 특히 임계조건 비교기를 이용하여 영상신호를 압축하여 전송하는 영상부호화 장치 및 방법에 관한 것이다.The present invention relates to a video compression encoding apparatus and method of an image processing system such as a video telephone or a videoconferencing system, and more particularly, to a video encoding apparatus and method for compressing and transmitting a video signal using a threshold condition comparator.

영상전화기나 화상회의 시스템과 같은 영상처리 시스템에서 영상신호를 압축하여 전송할시 현재 프레임과 이전 프레임의 예측 오차치를 검출하여 배경이나 움직임이 없을 경우에 예측 오차치를 제로 값으로 하고 배경이 다르고 움직임이 있을 경우에 현재 프레임과 이전 프레임의 예측 오차치를 그대로 사용하여 변환 부호화 함으로서, 전송하는 전체 데이타 량을 감소시켜 압축 효율을 증대할 뿐만 아니라 블럭단위로 노이즈를 제거한다.When the video signal is compressed and transmitted in a video processing system such as a video telephone or a video conferencing system, the prediction error value of the current frame and the previous frame is detected. In this case, by transcoding using the prediction error values of the current frame and the previous frame as it is, the amount of data to be transmitted is reduced as well as the compression efficiency is increased and the noise is removed in units of blocks.

Description

영상 압축 부호화 장치 및 방법Image compression coding apparatus and method

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

제2도는 본 발명에 따른 영상 압축부호화 장치의 구성도,2 is a configuration diagram of an image compression encoding apparatus according to the present invention;

제3도는 제2도중 임계조건 비교기(44)의 구체블럭도,3 is a concrete block diagram of the threshold condition comparator 44 during the second diagram,

제4도는 본 발명에 따른 감산 및 임계조건 기능을 수행하기 위한 흐름도.4 is a flowchart for performing a subtraction and critical condition function in accordance with the present invention.

Claims (3)

영상처리 시스템의 영상 압축 부호화 장치에 있어서, 아나로그 영상신호를 디지탈 변환하여 출력하는 입력처리기(22)와, 상기입력처리기(22)의 출력 데이터를 주사순서에 따라 블럭단위의 데이터로 구성하여 출력하는 블럭구성기(24)와, 전 프레임에서 공간적으로 동일한 위치의 동일크기의 블럭 데이터를 출력하는 프레임 메모리(42)와, 상기 블럭구성기(28)의 데이타부터 상기 프레임 메모리(42)에서 출력되는 이전 프레임 블럭 데이타를 감산하여 출력된 예측 오차의 데이타 량을 감소시키고 노이즈를 제거하여 출력하는 임계조건 비교기(44)와, 상기 임계조건 비교기(44)의 출력을 변환 부호화하고 양자화 출력하는 변환 부호화기(30) 및 양자화기(32)와, 상기 양자화기(32)의 출력을 역양자화 및 역변환 부호화하는 역양자화기(36) 및 역변환 부호화기(38)와, 상기 역변환 부호화기(38)의 출력과 상기 프레임 메모리(42)의 데이타를 가산하여 재생 데이타(RD)를 출력하는 가산기(40)와, 상기 감산기(28)에서 블럭단위로 감산 출력된 신호를 일시적으로 저장하는 입력버퍼(50)와, 상기 입력버퍼(50)에 저장된 신호를 읽어들여 감산 및 임계조건 기능을 수행하여 예측 오차치를 출력하는 제어부(52)와, 상기 제어부(52)에서 출력된 예측 오차치를 일시적으로 저장하는 출력 버퍼(54)와, 상기 제어부(52)에 연결되어 현재 프레임과 이전 프레임의 두 프레임의 데이타를 저장하는 프레임 메모리(56)로 구성함을 특징으로 하는 장치.A video compression encoding apparatus of an image processing system, comprising: an input processor (22) for digitally converting an analog image signal and outputting the same; and output data of the input processor (22) in block unit data according to a scanning order A block configurator 24, a frame memory 42 for outputting block data of the same size at a spatially identical position in all frames, and data from the block configurator 28 to the frame memory 42. A threshold condition comparator 44 which reduces the data amount of the prediction error output by subtracting the previous frame block data, and removes and outputs the noise; and a transform encoder that transform-codes and quantizes the output of the threshold condition comparator 44. 30 and the quantizer 32, an inverse quantizer 36 and an inverse transform encoder 38 for inverse quantization and inverse transform encoding of the output of the quantizer 32, An adder 40 which adds the output of the inverse transform encoder 38 and the data of the frame memory 42 to output reproduction data RD, and temporarily subtracts the signal subtracted and output by the subtractor 28 in units of blocks. A control unit 52 for storing an input buffer 50, a signal stored in the input buffer 50 and performing a subtraction and threshold condition function to output a prediction error value, and a prediction error output from the control unit 52 And an output buffer (54) for temporarily storing the value, and a frame memory (56) connected to the controller (52) for storing data of two frames of the current frame and the previous frame. 제1항에 있어서, 상기 블럭구성기(24)에서 블럭단위로 출력된 영상신호를 일시적으로 저장하는 입력버퍼(50)와, 상기 입력버퍼(50)에 저장된 신호를 읽어들여 감산 및 임계조건 기능을 수행하여 예측 오차치를 출력하는 제어부(52)와, 상기 제어부(52)에서 출력된 예측 오차치를 일시적으로 저장하는 출력버퍼(54)로 구성함을 특징으로 하는 장치.The method of claim 1, further comprising: an input buffer 50 for temporarily storing image signals output in block units from the block configurator 24, and a subtraction and threshold condition function by reading a signal stored in the input buffer 50; And an output buffer (54) for temporarily storing the prediction error value outputted from the controller (52). 영상처리 시스템의 영상 압축 부호화 방법에 있어서, 블럭단위로 배열된 현재 프레임의 영상신호와 이전 프레임의 영상신호를 감산하여 예측 오차치를 검출하는 예측오차지 검출과정과, 상기 예측오차치 검출과정에서 검출한 예측오차치를 받아 배경이나 움직임이 없을시 예측 오차치를 제로값으로 출력하고, 배경이 다르고 움직임이 있을시에 상기 검출한 예측 오차치를 그대로 출력하는 예측오차치 결정과정으로 이루어짐을 특징으로 하는 예측오차치 검출방법.A video compression encoding method of an image processing system, comprising: a prediction error detection step of detecting a prediction error value by subtracting a video signal of a current frame arranged in a block unit and a video signal of a previous frame; and detecting in the prediction error detection step Prediction error characterized in that it consists of a prediction error value determination process that receives a prediction error value and outputs a prediction error value as a zero value when there is no background or motion, and outputs the detected prediction error value as it is when the background is different and there is motion. Value detection method. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920021135A 1992-11-11 1992-11-11 Image compressing & encoding apparatus and method KR950005624B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100463004B1 (en) * 1997-03-20 2005-06-02 주식회사 팬택앤큐리텔 Method for encoding mpeg-4 vop
KR100525678B1 (en) * 2000-06-06 2005-11-03 Method and system for compressing motion image information
KR100754155B1 (en) * 2000-08-14 2007-09-03 삼성전자주식회사 A apparatus and method for transmitting optical signal of graphic signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100463004B1 (en) * 1997-03-20 2005-06-02 주식회사 팬택앤큐리텔 Method for encoding mpeg-4 vop
KR100525678B1 (en) * 2000-06-06 2005-11-03 Method and system for compressing motion image information
KR100754155B1 (en) * 2000-08-14 2007-09-03 삼성전자주식회사 A apparatus and method for transmitting optical signal of graphic signal

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