Open Access270 MHz Full HD H.264/AVC High Profile Encoder with Shared Multibank Memory‐Based Fast Motion Estimation
Author(s) -
Lee Sukho,
Park Seongmo,
Park Jongwon
Publication year - 2009
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.09.1209.0007
Subject(s) - computer science , encoder , motion vector , motion estimation , static random access memory , encoding (memory) , computer hardware , reduction (mathematics) , video quality , frame (networking) , real time computing , frame rate , auxiliary memory , algorithm , computer vision , artificial intelligence , engineering , image (mathematics) , telecommunications , mathematics , metric (unit) , operations management , geometry , operating system
We present a full HD (1080p) H.264/AVC High Profile hardware encoder based on fast motion estimation (ME). Most processing cycles are occupied with ME and use external memory access to fetch samples, which degrades the performance of the encoder. A novel approach to fast ME which uses shared multibank memory can solve these problems. The proposed pixel subsampling ME algorithm is suitable for fast motion vector searches for high‐quality resolution images. The proposed algorithm achieves an 87.5% reduction of computational complexity compared with the full search algorithm in the JM reference software, while sustaining the video quality without any conspicuous PSNR loss. The usage amount of shared multibank memory between the coarse ME and fine ME blocks is 93.6%, which saves external memory access cycles and speeds up ME. It is feasible to perform the algorithm at a 270 MHz clock speed for 30 frame/s real‐time full HD encoding. Its total gate count is 872k, and internal SRAM size is 41.8 kB.