KR20130101480A - 영상 부호화 및 복호화 방법 및 장치 - Google Patents
영상 부호화 및 복호화 방법 및 장치 Download PDFInfo
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Abstract
Description
도 2는 본 발명이 적용되는 영상 복호화 장치의 일 실시예에 따른 구성을 나타내는 블록도,
도 3은 본 발명의 일 실시예에 따른 영상 부호화/복호화 방법의 현재 블록의 최종 예측값 산출 과정을 나타낸 흐름도,
도 4는 인트라 예측에 사용할 참조 화소를 구하는 과정의 실시예를 개략적으로 나타낸 흐름도,
도 5는 인트라 예측에 사용할 참조 화소를 구하는 과정에서 사용 불가능한 화소의 대체를 위한 실시예를 개략적으로 나타낸 도면,
도 6은 현재 블록의 부호화 정보와 예측 대상 화소의 위치에 따라 화면내 예측값 보정 여부를 결정하는 과정의 실시예를 개략적으로 나타낸 흐름도,
도 7a은 수직 예측 모드에서 현재 블록 내 화소에 대한 1차 예측 값을 최종 예측 값으로 사용하는 실시예를 개략적으로 나타낸 도면,
도 7b은 수평 예측 모드에서 현재 블록 내 화소에 대한 1차 예측 값을 최종 예측 값으로 사용하는 실시예를 개략적으로 나타낸 도면,
도 8은 현재 블록 내 화소에 대한 1차 예측 값에 보정을 수행하여 최종 예측 값을 산출하는 실시예를 개략적으로 나타낸 흐름도,
도 9a는 수직 모드 사용시 1차 예측 값에 보정을 수행하여 최종 예측 값을 산출하는 실시예를 개략적으로 나타낸 도면,
도 9b는 수평 모드 사용시 1차 예측 값에 보정을 수행하여 최종 예측 값을 산출하는 실시예를 개략적으로 나타낸 도면,
도 10은 본 발명의 다른 실시예에 따른 영상 부호화/복호화 방법의 스케일링 수행 과정을 개략적으로 나타낸 흐름도,
도 11a는 현재 픽처와 공간적 참조 블록의 참조 픽처 사이의 POC(Picture Order Count) 차이 및 현재 픽처와 현재 블록의 참조 픽처의 사이의 POC 차이를 나타내는 도면,
도 11b는 대응 위치 블록의 참조 픽처와 대응 위치 픽처 사이의 POC 차이 및현재 픽처와 현재 블록의 참조 픽처 사이의 POC 차이를 나타내는 도면,
도 12는 POC 차이 값들을 기반으로 움직임 벡터에 대한 스케일링 인자 값을 계산하는 과정의 실시예를 개략적으로 나타낸 흐름도,
도 13은 tb 값과 td 값의 반비례값을 기반으로 최종 스케일링 인자 값을 계산하는 구성을 개략적으로 나타낸 블록도이다.
120 : 인트라 예측부
130 : 변환부
140 : 양자화부
150 : 엔트로피 부호화부
Claims (1)
- 영상의 복호화 방법에 있어서,
엔트로피 복호화된 잔차 블록을 역양자화 및 역변환하여 잔차 블록을 복원하는 단계;
현재 블록에 대해 화면내 예측을 수행하여 예측 블록을 생성하는 단계; 및
상기 예측 블록에 상기 복원된 잔차 블록을 더하여 영상을 복원하는 단계를 포함하되,
상기 예측 블록 생성 단계는 상기 현재 블록에 포함된 예측 대상 화소의 1차 예측값과, 상기 예측 대상 화소의 초기 보정값에 관한 2의 보수 정수 표현에 대해 이진자릿수 1만큼 산술적 우측 이동을 수행하여 계산된 최종 보정값을 기반으로 상기 예측 대상 화소의 최종 예측값을 생성하는 단계를 포함하는 것을 특징으로 하는 영상 복호화 방법.
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| KR1020170126207A Active KR102013638B1 (ko) | 2012-01-18 | 2017-09-28 | 영상 부호화 및 복호화 방법 및 장치 |
| KR1020190100771A Active KR102100700B1 (ko) | 2012-01-18 | 2019-08-19 | 영상 부호화 및 복호화 방법 및 장치 |
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| US (13) | US9807412B2 (ko) |
| EP (4) | EP2806635A4 (ko) |
| JP (8) | JP6101709B2 (ko) |
| KR (16) | KR101366649B1 (ko) |
| CN (12) | CN104137549B9 (ko) |
| WO (1) | WO2013109092A1 (ko) |
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