계층적 Ｂ 픽쳐를 이용한 동영상 코딩시에 ＧＯＰ 크기를 성능에 따라 지능적으로 선택하기 위한 방법
박민우, 박광훈, 정세윤, 김규헌, 홍진우
- 8184702 (2012.05.22)
- Provided is a method for performing hierarchical B picture-based coding on a video sequence using the structure of adaptively divided group of pictures (GOP). The method includes the steps of, for each predefined 2N frame-sized group of pictures (GOP) of the video sequence, (a) encoding the 2N frame-sized GOP of the video sequence based on each of the different GOP sizes from the maximum size, 2N, to the minimum size, 2M (M is an integer between 1 and N) and obtaining different values between frames reconstructed after the encoding is performed and frames after the hierarchical B-picture prediction is performed, based on each of the different GOP sizes; (b) selecting at least one sub-GOP based on the difference values obtained by encoding the 2N frame-sized GOP of the video sequence based on each of the different GOP sizes; and (c) generating a bitstream by encoding the 2N-frame-sized GOP based on the at least one selected sub-GOP. Thereby, the hierarchical B picture-based video coding is performed by adaptively dividing the GOP size based on performance and thereby obtains high coding efficiency.
- KSP 제안 키워드
- Coding efficiency, Hierarchical B-picture, Maximum size, Minimum size, Video coding, group of pictures(GOP), video sequences