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KR930011724A - 활동 비데오 압축 시스템 - Google Patents

활동 비데오 압축 시스템 Download PDF

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KR930011724A
KR930011724A KR1019920020744A KR920020744A KR930011724A KR 930011724 A KR930011724 A KR 930011724A KR 1019920020744 A KR1019920020744 A KR 1019920020744A KR 920020744 A KR920020744 A KR 920020744A KR 930011724 A KR930011724 A KR 930011724A
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아우구스토 곤잘레스 세자르
비스키토 에릭
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죤 디. 크래인
인터내셔널 비니네스 머신즈 코포레이션
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Abstract

3개의 합동 성분 또는 서브 시스템을 포함하는 제안된 ISO/IEC MPEG 표준으로 이용이 적합한 엔코더를 채용하여, 시켄스로 화상에 비트를 할당하고, 상기 화상에 할당된 비트수에 부여된 최적의 가상 품질이 제공되도록 비데오 시켄스로 화상의 서로 다른 영역에 있는 계수들을 적절히 양자화 변행하는 동작을 하는 시스템 및 그 방법에 관한 것이다.

Description

활동 비데오 압축 시스템
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 화상그룹들(GOPs)의 예를 보인 도면.
제2도는 화상의 매크로블록(MB) 분할을 보인도.
제3도는 프임이 또는 화상의 슬라이스 분할을 보인 도면.
제4도는 매크로블록의 블록 분할을 보인 도면.
제5도는 MPEG에 사용된 GOP내의 화상중에서 2-레벨 활동 보상을 설명하는 보인 도면.
제6도는 본 발명에 따른 기술을 실시하기 위한 3개의 성분 서브시스템을 포함하는 MPEG 엔코더의 블럭선도.
제7도는 MPEG 표준에 사용되는 2개의 테스트 시켄스로 이루어지는 비디오 시켄스에 있는 모든 화상 시켄스들에 대한 코딩 난해인자(coding difficulty facgors)를 보인 도면으로서, 플라우워 가든 시켄스의 첫 60 프레임, 테이블테니스 시퀀스의 첫 60프레임, (정지장면을 시뮬레이션 하기 위한) 테니스 테이블의 61번째 프레임의 30번의 반복을 차례로 포함한다.
제8도는 제7도의 시켄스의 각 화상에 대한 비트 할당을 보인 도면.
제9a도 및 9b도는 제7도의 시켄스의 각 화상에 대한 타켓 및 실질적인 비트율을 보인 도면.
제10도는 제7도의 시켄스를 코딩하는데 이용되는 양자화(QP) 인자의 플롯을
보인 도면.
제11도는 제6도의 AQ/RC 화상 코더 서브시스템을 보다 상세히 보인 블록선도.
제12a도 대지 12d도는 MPEG 테스트 시켄스의 플라우워 가든과 테이블 테니스 셰그먼트로부터 취해지는 1화상과 P화상의 전형적인 클래스 분포를 보인 도면.
제13a 내지 13d도는 테스트 시켄스의 프레임 16,22,61,67의 각항에 있는 평균 QP의 QPlow을 보인 도면.
제14a 내지 14d도는 행-행 방식으로 생성된 비트대 타켓과의 관계를 보인 도면.
제15도는 제6도에 보인 QP적응성 프로세서를 세부적으로 보인 도면.
제16도는 제15도에 보인 QP적응성 프리-프로세서의 3개의 필터 상태(FS)를 보인 도면.

Claims (6)

  1. 시켄스에 있는 화상들을 표시하는 디지탈 데이타 신호가 변형 및 양자화에 의해 처리되는 활동 비데오 압축시스템에서, 사전 처리된 화상 디지탈데이타 신호의 시켄스를 제공하기 위해 다수의 사전 처리 방법중 한 방법에 따라 상기 시켄스에 있는 적어도 하나의 화상의 디지탈 데이타 신호를 사전 처리하는 단계와, 변형 및 양자화기술을 이용하여, 사전 처리된 화상 디지탈데이타 신호를 압축 코딩하는 단계와, 상기 시켄스에서 이전에 코딩된 화상의 압축 코딩에서 이용된 양자화 정보를 표시하는 신호에 응답하여, 상기 화상을 압축 코딩하기에 앞서 상기화상에 대한 디지탈 데이타 신호들에 대해 활용되는 사전 처리 방법을 선택하는 단계를 포함하는 것을 특징으로 하는 활동 비데오 압축 시스템.
  2. 제1항에 있어서, 상기 다수의 사진 처리 방법은 양자화 정도와 관계하는 사전 처리의 정도에 따라 순서가 정해지고, 적어도 하나의 높은 드레시홀드가 상기 정도와 관계하여 선택되며, 선행 화상을 사진 처리하는데 이용되는 방법의 정도가 높은 드레시홀드를 초과하지 않는 한 상기 시켄스에서 상기 선행화상을 사전 처리하는데 이용되는 것과 같게 되도록 선택하고, 여기서 보다 높은 정도의 사진 처리 방법이 상기 화상을 사진 처리하도톡 선택되는 활동 비데오 압축 시스템.
  3. 제1항에 있어서, 다수의 사진처리 방법은 양자화정도와 관계하여 그들의 사진처리 정도에 따라 순위가 정해지고 그리고 적어도 하나의 낮은 드레시홀드가 상기 정도에 따라 선택되며, 선행 화상을 사진 처리하는데 이용되는 방법의 정도가 낮은 드레시홀드를 초과하지 않는 한 상기 시켄스에서 상기 선행 화상을 사진 처리하는데 이용되는 것과 같게 되도록 선택하고, 여기서 보다 낮은 정도의 사진처리 방법이 상기 화상을 사진처리 하도록 선택되는 것에 특징이 있는 활동 비데오 압축 시스템.
  4. 제1항에 있어서, 다수의 사전 처리 방법이 양자화 정도와 관계하여 그들의 사진처리 정도에 따라 순위가 정해지고, 상기 드레시홀드를 갖는 상기 시켄스에서 선행 화상을 선행 처리하는데 이용되는 방법의 정도를 비교하고 그리고 상기 비교 결과에 응답하여 사진처리 방법의 정도가 변환되어야 하는지의 여부를 표시하는 판정 신호를 생성하므로써, 상기 화상을 사전 처리하는데 이용되도록 사진처리 방법을 선택하는 것에 특징이 있는 활동비데오 압축 시스템.
  5. 제4항에 있어서, 상기 판정 신호는 시켄스에서 사진 선택된 화상을 압축 코딩하기 바로 전에 사진처리 방법의 정도의 변화를 표시하는 것에 특징이 있는 활동 비데오 압축 시스템.
  6. 제4항에 있어서, 사진처리 방법의 정도의 변화는 상기 판정 신호가 정도의 변화를 표시하는 화상을 따르는 상기 시켄스에서의 다수의 화상으로 지연되는 것에 특징이 있는 활동 비데오 압축 시스템.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019920020744A 1991-11-08 1992-11-06 동영상 압축 시스템 Expired - Fee Related KR960007264B1 (ko)

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