SIMD Instruction-based Fast HEVC RExt Decoder

In this paper, we introduce the fast decoding method with the SIMD (Single Instruction Multiple Data) instructions for HEVC RExt (High Efficiency Video Coding Range Extensions). Several tools of HEVC RExt such as intra prediction, interpolation, inverse-quantization, inverse-transform, and clipping modules can be classified as the proper modules for applying the SIMD instructions. In consideration of bit-depth increasement of RExt, intra prediction, interpolation, inverse-quantization, inversetransform, and clipping modules are accelerated by SSE (Streaming SIMD Extension) instructions. In addition, we propose effective implementations for interpolation filter, inverse-quantization, and clipping modules by utilizing a set of AVX2 (Advanced Vector eXtension 2) instructions that can use 256 bits register. The evaluation of the proposed methods were performed on the private HEVC RExt decoder developed based on HM 16.0. The experimental results show that the developed RExt decoder reduces 12% average decoding time, compared with the conventional sequential method. Keyword : HEVC, RExt, HEVC Range extensions, SIMD, Parallelization 특집논문 (Special Paper) 방송공학회논문지 제20권 제2호, 2015년 3월 (JBE Vol. 20, No. 2, March 2015) http://dx.doi.org/10.5909/JBE.2015.20.2.224 ISSN 2287-9137 (Online) ISSN 1226-7953 (Print) 목정수 외 3인 : SIMD 명령어 기반 HEVC RExt 복호화기 고속화 225 (Jung-Soo Mok et al.: SIMD Instruction-based Fast HEVC RExt Decoder)