KR970073156A - A moving picture encoding / decoding method and a coding / decoding device capable of processing on an object-by-object basis - Google Patents

A moving picture encoding / decoding method and a coding / decoding device capable of processing on an object-by-object basis Download PDF

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KR970073156A
KR970073156A KR1019960013148A KR19960013148A KR970073156A KR 970073156 A KR970073156 A KR 970073156A KR 1019960013148 A KR1019960013148 A KR 1019960013148A KR 19960013148 A KR19960013148 A KR 19960013148A KR 970073156 A KR970073156 A KR 970073156A
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이시화
신재섭
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김광호
삼성전자 주식회사
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Abstract

본 발명은 객체단위의 처리가 가능한 동영상 부호화/복호화방법 및 부호화/복호화장치에 관한 것으로서, 본 발명에 의한 동영상 부호화방법은 부호화하고자 하는 1 프레임분의 소스영상을 객체를 나타내는 포그라운드 영역과 그외의 영역을 나타내는 백그라운드 영역으로 분할하고, 두 영역의 경계를 나타내는 마스크정보를 생성하는 마스크 생성과정; 분할된 두 영역에 대하여 별도로 움직임 평가를 수행하여 움직임벡터를 생성하고, 각 영역의 움직임벡터를 이용하며 백그라운드 영역의 움직임 여부에 따라서 이전 복원영상 혹은 현재 복원영상에 대하여 선택적으로 움직임 보상을 수행하여 움직임 보상영상을 생성하는 움직임 평가 및 보상과정; 1 프레임분의 소스영상으로부터 움직임 보상영상을 감산하여 레지듀신호를 구하는 레지듀신호 생성과정; 및 레지듀신호를 가변블럭을 단위로 하여 이산여현변환한 후 양자화 및 가변길이 부호화를 통해 부호화하고, 부호화된 신호, 마스크 정보와 두 영역에 대한 움직임벡터를 다중화하여 출력하는 레지듀신호 부호화과정을 구비한다. 따라서, 시감적으로 가장 민감한 부분인 포그라운드과 백그라운드의 경계를 쿼드트리를 이용한 가변블럭을 사용하여 부호화함으로써, 경계부분을 뚜렷하게 복원할 수 있을 뿐 아니라 이산여현변환이갖는 에러의 번짐 현상도 줄일 수 있으므로 복원영상의 화질을 향상시킬 수 있다.The present invention relates to a moving picture coding / decoding method and a coding / decoding device capable of processing on an object-by-object basis. In the moving picture coding method according to the present invention, a source image for one frame to be coded is divided into a foreground area A mask generation step of generating mask information indicating a boundary between the two areas; Motion estimation is performed separately for the two divided areas to generate a motion vector and a motion vector of each area is used to perform motion compensation selectively on the previous reconstructed image or the current reconstructed image according to whether the background area is moving or not A motion estimation and compensation process for generating a compensation image; A residue signal generation step of subtracting a motion compensation image from a source image of one frame to obtain a residue signal; And a residual signal coding process for coding the residual signal by quantization and variable length coding after the variable block is transformed into a variable block and multiplexing the encoded signal and mask information and the motion vectors for the two areas, Respectively. Therefore, by encoding the boundary of the foreground and the background, which are the most sensitive parts, by using a variable block using a quad tree, not only the boundary part can be clearly restored, but also the error blurring of the discrete cosine transform can be reduced The image quality of the restored image can be improved.

Description

객체단위의 처리가 가능한 동영상 부호화/복호화방법 및 부호화/복호화장치A moving picture encoding / decoding method and a coding / decoding device capable of processing on an object-by-object basis

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제 1도는 본 발명에 의한 객체단위의 처리가 가능한 동영상 부호화장치를 나타낸 블록도, 제2도는 본 발명에 의한 객체단위의 처리가 가능한 동영상 복호화장치를 나타낸 블록도, 제3도는 객체단위의 처리를 위한 마스크의 생성과 쿼드트리를 이용한 부호화방법의 예를 나타낸 도면.FIG. 1 is a block diagram showing a moving picture encoding apparatus capable of processing an object unit according to the present invention, FIG. 2 is a block diagram showing a moving picture decoding apparatus capable of processing an object unit according to the present invention, And a method of encoding using a quadtree.

Claims (8)

부호화하고자 하는 1 프레임분의 소스영상을 객체를 나타내는 포그라운드 영역과 그외의 영역을 나타내는 백그라운드 영역으로 분할하고, 상기 두 영역의 경계를 나타내는 마스크정보를 생성하는 마스크 생성과정; 상기 분할된 두 영역에 대하여 별도로 움직임 평가를 수행하여 움직임벡터를 생성하고 상기 각 영역의 움직임벡터를 이용하며 상기 백그라운드 영역의 움빅임 여부에 따라서 이전 복원영상 혹은 현재 복원영상에 대하여 선택적으로 움직임 보상을 수행하여 움직임 보상영상을 생성하는 움직임 평가 및 보상과정; 상기 1 프레임분의 소스영상으로부터 상기 움직임 보상영상을 감산하여 레지듀신호를 구하는 레지듀신호 생성과정; 및 상기 레지듀신호를 가변블럭을 단위로 하여 이산여현변환한 후 양자화 및 가변길이 부호화를 통해 부호화하고, 상기 부호화된 신호, 상기 마스크정보아 두 영역에 대한 움직임벡터를 다중화하여 출력하는 레지듀신호 부호화과정을 구비하는 것을 특징으로 하는객체단위의 처리가 가능한 동영상 부호화방법.A mask generation step of dividing a source image of one frame to be encoded into a foreground area representing an object and a background area representing another area and generating mask information indicating a boundary between the two areas; A motion vector is generated by separately performing motion estimation on the two divided areas, motion vectors of the respective areas are used, and motion compensation is selectively performed on the previous reconstructed image or the current reconstructed image according to whether the background area is distorted A motion estimation and compensation process for generating a motion compensation image by performing the motion estimation and compensation process; A residue signal generation step of subtracting the motion compensation image from the source image of one frame to obtain a residue signal; And a residual signal generating unit for generating a residual signal by multiplexing a motion vector for the coded signal, the mask information sub-region, and a residual signal, Wherein the encoding process is performed on an object-by-object basis. 제 1항에 있어서, 상기 움직임 평가 및 보상과정에서는 상기 포그라운드 영역에 대해서는 가변블럭 단위로 움직임 평가를 수행하고, 상기 백그라운드 영역에 대해서는 백그라운드 영역의 복잡도에 따라서 가변블럭 단위의 움직임 평가 혹은 어파인 움직임 평가를 수행하는 것을 특징으로 하는 객체단위의 처리가 가능한 동영상 부호화방법.The method of claim 1, wherein in the motion estimation and compensation process, motion estimation is performed on the foreground region on a variable block unit basis, motion estimation or affine motion on a variable block basis is performed on the background region according to the complexity of the background region, And evaluating the motion of the object. 제2항에 있어서, 상기 두 영역의 경계 부분은 쿼드 트리 방식에 의해 부호화되는 것을 특징으로 하는 개체단위의 처리가 가능한 동영상 부호화방법.3. The method of claim 2, wherein the boundary between the two regions is encoded by a quad tree method. 부호화하고자 하는 1 프레임분의 소스영상을 객체를 나타내는 포그라운드 영역과 그외의 영역을 나타내는 백그라운드 영역으로 분할하고, 상기 두 영역의 경계를 나타내는 마스크정보를 생성하는 포그라운드/백그라운드 추출기; 상기 분할된 두 영역에 대하여 별도로 움직임 평가를 수행하여 움직임벡터를 생성하는포그라운드/백그라운드 움직임 평가기; 상기 각 영역의 움직임벡터를 이용하며 상기 백그라운드 영역의 움직임 여부에 따라서 이전 복원영상 혹은 현재 복원영상에 대하여 선택적으로 움직임 보상을 수행하여 움직임 보상영상을 생성하는 움직임 보상기; 상기 1 프레임분의 소스영상으로 부터 상기 움직임 보상영상을 감산하여 레지듀신호를 구하는 감산기; 및 상기 레지듀신호를 가변블럭을 단위로 하여 이산여현변환한 후 양자화 및 가변길이 부호화를 통해 부호화하고, 상기 부호화된 신호, 상기 마스크정보와 두 영역에 대한 움직임벡터를 다중화하여 출력하는 레지듀신호 부호화수단을 구비하는 것을 특징으로 하는 객체단위의 처리가 가능한 동영상 부호화장치.A foreground / background extractor for dividing a source image of one frame to be encoded into a foreground region representing an object and a background region representing another region, and generating mask information indicating a boundary between the two regions; A foreground / background motion estimator for separately performing motion estimation on the two divided areas to generate a motion vector; A motion compensator for generating a motion compensation image by selectively performing motion compensation on a previous reconstructed image or a current reconstructed image according to motion of the background region using motion vectors of the respective regions; A subtracter for subtracting the motion compensated image from the source image of one frame to obtain a residue signal; And a residue signal generating unit for generating a residue signal by multiplexing the encoded signal, the mask information, and the motion vectors for the two regions, and outputting the resultant signal, Wherein the moving picture coding unit is capable of processing on an object-by-object basis. 제4항에 있어서, 상기 두영역의 경계 부분은 쿼드 트리 방식에 의해 부호화되는 것을 특징으로 하는 객체 단위의 처리가 가능한 동영상 부호화장치.The moving picture coding apparatus according to claim 4, wherein the boundary between the two areas is encoded by a quad tree method. 1 프레임분의 소스영상을 객체를 나타내는 포그라운드 영역과 그외의 영역을 나타내는 백그라운드 영역으로 분할하고, 레지듀신호를 부호화하여 생성된 비트스트림을 원래의 동영상으로 복원하기 위한 객체단위의 처리가 가능한 동영상 복호화방법에 있어서, 상기 비트스트림으로 부터 상기 부호화된 레지듀신호를 추출하여 가변길이복호화, 역양자화 및 역이산여현변환하고, 상기 두 영역에 대한 움직임벡터와 상기 두 영역을 구분하는 마스크 정보를 복원하는 복호화과정; 이전 복원영상을 참조하여 상기 마스크 정보에 의해 구분된 두 영역에 대하여 별도로 움직임 보상을 수행하여 움직임 보상영상을 생성하고, 상기 복호화된 레지듀신호와 상기 움직임 보상영상을 가산하여 현재 복원영상을 생성하는 움직임 보상과정; 및 복호화된 레지듀신호와 상기 움직임 보상영상을 가산하여 현재 복원영상을 생성하는 움직임 보상과정; 및 상기 움직임벡터에 따라서, 상기 이전 복원영상 혹은 현재 복원영상을 선택적으로 출력하는 선택출력과정을 구비하는 것을 특징으로 하는 객체단위의 처리가 가능한 동영상 복호화방법.A source image for one frame is divided into a foreground region representing an object and a background region representing another region, and a video capable of processing in units of objects for restoring a bitstream generated by encoding a residue signal to the original video The decoding method includes extracting the coded residual signal from the bitstream and subjecting the coded residual signal to variable length decoding, inverse quantization, and inverse discrete cosine transform, and restoring the motion vector for the two areas and the mask information for distinguishing the two areas Decryption process; A motion compensated image is generated by separately performing motion compensation on the two regions separated by the mask information by referring to the previous reconstructed image, and the current restored image is generated by adding the decoded residual signal and the motion compensated image Motion compensation process; And a motion compensation step of adding a decoded residual signal and the motion compensation image to generate a current reconstructed image. And a selection output process for selectively outputting the previous reconstructed image or the current reconstructed image according to the motion vector. 1 프레임분의 소스영상을 객체를 나타내는 포그라운드 영역과 그외의 영역을 나타내는 백그라운드 영역으로 분할하고, 레지듀신호를 부호화하여 생성된 비트스트림을 원래의 동영상으로 복원하기 위한 객체단위의 처리가 가능한 동영상 복호화장치에 있어서, 상기 비트스트림으로 부터 상기 부호화된 레지듀신호를 추출하여 가변길이복호화하는 가변길이 복호화기; 상기 가변길이 복호화된 레지듀신호를 역양자화 및 역이산여현변환하여 상기 레지듀신호를 복호화하는 역양자화기 및 역이상여현변화기; 상기 두 영역에 대한 움직임벡터와 상기 두 영역을 구분하는 마스크 정보를 복원하는 마스크 복원기; 이전 복원양상을 참조하여 상기 마스크 정보에 의해 구분된 두 영역에 대하여 별도로 움직임 보상을 수행하여 움직임 보상영상을 생성하는 움직임 보상기; 상기 복호화된 레지듀신호와 상기 움직임 보상영상을 가산하여 현재 복원영상을 생성하는 가산기; 이전 복원영상을 저장하는 복원프레임 저장기 ; 및 상기 움직임벡터에 따라서, 상기 이전 복원영상 혹은 현재 복원영상을 저장하는 복원프레임 저장기; 및 상기 움직임벡터에 따라서, 상기 이전 복원영상 혹은 현재 복원영상을 선택적으로 출력하는 선택출력기를 구비하는 것을 특징으로 하는 객체단위의 처리가 가능한 동영상 복호화장치.A source image for one frame is divided into a foreground region representing an object and a background region representing another region, and a video capable of processing in units of objects for restoring a bitstream generated by encoding a residue signal to the original video A decoding apparatus comprising: a variable length decoder for extracting the coded residual signal from the bit stream and performing variable length decoding; An inverse quantizer and an inverse quantizer for performing inverse quantization and inverse discrete cosine transform of the variable length decoded residual signal to decode the residual signal; A mask reconstructor for reconstructing a motion vector for the two areas and mask information for distinguishing the two areas; A motion compensator for generating a motion compensation image by separately performing motion compensation on two areas separated by the mask information with reference to a previous restoration pattern; An adder for adding the decoded residual signal and the motion compensated image to generate a current reconstructed image; A restoration frame storage for storing previous restored images; And a restored frame storage unit for storing the previous restored image or the current restored image according to the motion vector. And a selector for selectively outputting the previous restored image or the current restored image according to the motion vector. 제7항에 있어서, 상기 선택출력기에서는 상기 움직임벡터에 따라서 움직임이 없다고 판단되는 영역에 대해서는 상기 이전 복원영상을 출력하고, 움직임이 있다고 판단되는 영역에 대해서는 상기 현재 복원영상을 출력하는 것을 특징으로 하는 객체단위의 처리가 가능한 동영상 복호화장치.The apparatus of claim 7, wherein the selection output unit outputs the previous reconstructed image for an area determined to have no motion according to the motion vector, and outputs the currently reconstructed image for an area determined to have motion A video decoding apparatus capable of processing on an object-by-object basis. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960013148A 1996-04-26 1996-04-26 Method and apparatus for encoding and decoding moving pictures capable of being processed by object units KR100403800B1 (en)

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KR100371868B1 (en) * 2001-02-19 2003-02-12 학교법인 한국정보통신학원 Object mask tracking apparatus for object-based access in image encoding/decoding system
KR100493702B1 (en) * 2002-10-09 2005-06-02 엘지전자 주식회사 Image communication system and operating method thereof
KR100718121B1 (en) * 2003-05-16 2007-05-15 삼성전자주식회사 A image encoding/decoding methods and apparatus using residue prediction of image
KR100723408B1 (en) * 2004-07-22 2007-05-30 삼성전자주식회사 Method and apparatus to transform/inverse transform and quantize/dequantize color image, and method and apparatus to encode/decode color image using it
KR100813958B1 (en) * 2004-06-07 2008-03-14 세종대학교산학협력단 Method of lossless encoding and decoding, and apparatus thereof
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100371868B1 (en) * 2001-02-19 2003-02-12 학교법인 한국정보통신학원 Object mask tracking apparatus for object-based access in image encoding/decoding system
KR100493702B1 (en) * 2002-10-09 2005-06-02 엘지전자 주식회사 Image communication system and operating method thereof
KR100718121B1 (en) * 2003-05-16 2007-05-15 삼성전자주식회사 A image encoding/decoding methods and apparatus using residue prediction of image
KR100813958B1 (en) * 2004-06-07 2008-03-14 세종대학교산학협력단 Method of lossless encoding and decoding, and apparatus thereof
KR100723408B1 (en) * 2004-07-22 2007-05-30 삼성전자주식회사 Method and apparatus to transform/inverse transform and quantize/dequantize color image, and method and apparatus to encode/decode color image using it
KR102302041B1 (en) * 2020-08-21 2021-09-15 이제희 Cctv video management system for personal information protection

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