Tytuł artykułuKey-point Detection based Fast CU Decision for HEVC Intra Encoding
Tytuł czasopismaInternational Journal of Electronics and Telecommunications
Słowa kluczoweHEVC ; Video Coding ; Fast CU Decision ; Corner Detection
Wydział PANNauki Techniczne
AbstraktAs the most recent video coding standard, High Efficiency Video Coding (HEVC) adopts various novel techniques, including a quad-tree based coding unit (CU) structure and additional angular modes used for intra encoding. These new techniques achieve a notable improvement in coding efficiency at the penalty of significant computational complexity increase. Thus, a fast HEVC coding algorithm is highly desirable. In this paper, we propose a fast intra CU decision algorithm for HEVC to reduce the coding complexity, mainly based on a key-point detection. A CU block is considered to have multiple gradients and is early split if corner points are detected inside the block. On the other hand, a CU block without corner points is treated to be terminated when its RD cost is also small according to statistics of the previous frames. The proposed fast algorithm achieves over 62% encoding time reduction with 3.66%, 2.82%, and 2.53% BD-Rate loss for Y, U, and V components, averagely. The experimental results show that the proposed method is efficient to fast decide CU size in HEVC intra coding, even though only static parameters are applied to all test sequences.
WydawcaPolish Academy of Sciences Committee of Electronics and Telecommunications
TypArtykuły / Articles
IdentyfikatorISSN 2081-8491 (until 2012) ; eISSN 2300-1933 (since 2013)