KR20080087147A - 복합형 비디오 부호화에서의 예측 에러의 적응 부호화 기술 - Google Patents
복합형 비디오 부호화에서의 예측 에러의 적응 부호화 기술 Download PDFInfo
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Abstract
Description
Claims (22)
- 복합형 부호화를 이용한 비디오 신호 부호화 방법에 있어서,예측 에러 신호를 설정하기 위해 블록 기반 움직임 보상 예측을 통해 시영역 중복성(temporal redundancy)을 감소하는 단계와,상기 예측 에러 신호를 주파수 영역으로 변환할 것인지, 또는 부호화를 위해 상기 예측 에러 신호를 공간 영역에서 유지할 것인지를 결정하는 단계를 포함하는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제1항에 있어서, 상기 결정 단계는 비용 함수에 기반하는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제1항 또는 제2항 중 어느 한 항에 있어서, 상기 비용 함수는 공간 영역에서의 부호화 및 주파수 영역에서의 부호화에 대한 비율 왜곡 비용(rate distortion cost)을 포함하는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제3항에 있어서, 상기 비율 왜곡 비용은 라그랑주(Lagrange) 파라미터 L에 의해 가중되는 요구 비율 R 및 결과적인 왜곡 D에 의해 계산되는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제4항에 있어서, 상기 왜곡 기준은 평균 제곱 양자화 에러 또는 평균 절대 양자화 에러인 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제1항 내지 제5항 중 어느 한 항에 있어서, 공간 영역의 샘플은 주파수 영역의 계수와 동일한 방법에 의해 부호화되는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제6항에 있어서, 상기 계수의 부호화는 CABAC 또는 CAVLC에 따라 수행되는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 시영역 중복성이 블록 기반 움직임 보상 예측을 통해 감소하는 복합형 부호화를 이용한 비디오 신호 부호화 방법에 있어서,공간 영역의 예측 에러 블록에서 예측 에러 신호의 샘플을 제공하는 단계와,특정 순서로 샘플의 어레이를 제공하기 위해 상기 예측 에러 블록의 샘플을 스캐닝하며, 스캐닝 방식은 예측 에러 이미지 또는 예측 이미지로부터 유도되는 것을 특징으로 하는 단계를 포함하는 비디오 신호 부호화 방법.
- 제8항에 있어서, 상기 스캐닝 방식은 상기 예측 이미지의 경도로부터 유도되는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제8항에 있어서, 상기 스캐닝 방식은 참조 블록의 예측 에러 이미지와 함께 움직임 벡터에 기반하는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제8항에 있어서, 상기 스캐닝 방식은 예측 이미지의 경도와, 움직임 벡터와 함께 참조 블록의 예측 에러 이미지의 선형 조합으로부터 유도되는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제1항 내지 제11항 중 어느 한 항에 있어서, 별도의 확률을 가지는 CABAC에 대한 특정 코드가 공간 영역에 대해 이용되는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제1항 내지 제12항 중 어느 한 항에 있어서, CAVLC에 대한 특정 코드가 공간 영역에 대해 이용되는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 제1항 내지 제13항 중 어느 한 항에 있어서, 사안별 가중 양자화 에러 최적화 또는 평균 제곱 양자화 에러 최적화를 가지는 양자화기에 의해 공간 영역의 예측 에러 샘플들 양자화하는 단계를 더 포함하는 것을 특징으로 하는 비디오 신호 부호화 방법.
- 부호화된 비디오 신호를 나타내는 데이터 신호에 있어서, 상기 데이터 신호는공간 영역에서 부분적으로 부호화되고 주파수 영역에서 부분적으로 부호화된 예측 에러 신호의 부호화된 정보를 포함하는 것을 특징으로 하는 데이터 신호.
- 제15항에 있어서, 슬라이스, 매크로블록, 또는 블록이 부호화된 영역에 관한 정보, 특히 슬라이스, 매크로블록, 또는 블록이 공간 영역에서 부호화되었는지 주파수 영역에서 부호화되었는지에 관한 정보를 포함하는 것을 특징으로 하는 데이터 신호.
- 제16항에 있어서, 슬라이스, 매크로블록, 또는 블록 각각에 대해 이용된 부호화와 연관된 slice_fd_sd_coding_flag, mb_fd_sd_coding_flag, 및/또는 fd_or_sd_flag 정보를 포함하는 것을 특징으로 하는 데이터 신호.
- 복합형 부호화를 이용한 비디오 신호 복호화 방법에 있어서,비디오 신호 데이터를 부호화하는데 이용된 부호화 메커니즘에 따라, 부호화된 비디오 데이터를 주파수 영역 또는 공간 영역에서 효과적으로 복호화하는 단계를 포함하는 것을 특징으로 하는 비디오 신호 복호화 방법.
- 제18항에 있어서, 1차원 어레이로 수신된 예측 에러 신호 샘플들의 위치들은 2차원 배열의 위치로 할당되며, 이전에 수신된 예측 에러 신호 또는 예측 이미지에 기초하여 결정되는 것을 특징으로 하는 비디오 신호 복호화 방법.
- 복합형 부호화를 이용하여 비디오 신호를 부호화하는 부호화기에 있어서,예측 에러 신호를 설정하기 위해 블록 기반 움직임 보상 예측을 통해 시영역 중복성을 감소시키는 수단과,상기 예측 에러 신호를 주파수 영역으로 변환할 것인지, 또는 상기 예측 에러 신호를 공간 영역에서 유지할 것인지를 결정하는 적응 제어 수단을 포함하는 것을 특징으로 하는 부호화기.
- 복합형 부호화 기술을 이용하여 부호화된 비디오 신호를 복호화하는 복호화기에 있어서,부호화된 비디오 신호의 입력 스트림이 공간 영역의 부호화된 비디오 신호의 예측 에러 신호를 나타내는지, 주파수 영역의 부호화된 비디오 신호의 예측 에러 신호를 나타내는지를 적응으로 결정하는 적응 제어 수단(201)을 포함하는 것을 특징으로 하는 복호화기.
- 제21항에 있어서, 예측 신호 또는 예측 에러 신호, 또는 이들의 선형 조합에 기초하여 스캐닝 순서를 제공하는 스캐닝 제어 수단을 더 포함하는 것을 특징으로 하는 복호화기.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20110037688A (ko) * | 2009-10-07 | 2011-04-13 | 에스케이 텔레콤주식회사 | 적응적 부호화 패턴 정보를 생성/이용하는 동영상 부호화/복호화 방법, 장치 및 기록 매체 |
| KR101880325B1 (ko) * | 2011-03-09 | 2018-07-19 | 파나소닉 인텔렉츄얼 프로퍼티 코포레이션 오브 아메리카 | 동화상 부호화 장치 |
| WO2012121575A3 (ko) * | 2011-03-10 | 2012-11-01 | 한국전자통신연구원 | 인트라 예측 방법 및 그 장치 |
| US11665355B2 (en) | 2017-05-19 | 2023-05-30 | Panasonic Intellectual Property Corporation Of America | Encoder, decoder, encoding method, and decoding method |
| US12047587B2 (en) | 2017-05-19 | 2024-07-23 | Panasonic Intellectual Property Corporation Of America | Encoder, decoder, encoding method, and decoding method |
| US12519952B2 (en) | 2017-05-19 | 2026-01-06 | Panasonic Intellectual Property Corporation Of America | Encoder, decoder, encoding method, and decoding method |
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