TY - GEN
T1 - Simplified Rate-Distortion Optimized Quantization for HEVC
AU - Xu, Motong
AU - Canh, Thuong Nguyen
AU - Jeon, Byeungwoo
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/8/14
Y1 - 2018/8/14
N2 - Rate-distortion optimized quantization (RDOQ) is shown to provide significant coding gain in HEVC but it also suffers from huge computational complexity. In this paper, we simplify the RDOQ tool in HEVC by enforcing more zero levels at high frequency locations without sacrificing coding efficiency much. First, we analyze the properties of each quantized level at different frequency locations. Subsequently, we set the quantized level of value 1 to 0 at specified high frequency locations to save the RDOQ processing time. In addition, a smaller round offset for quantization is adaptively used to minimize coding loss at high frequency locations. Our scheme is shown to reduce total quantization time by an average of 15.6% with only 0.01% loss in BDBR under the all intra coding configuration, and 13.17% of average time saving with 0.07% BDBR loss under the Random Access configuration.
AB - Rate-distortion optimized quantization (RDOQ) is shown to provide significant coding gain in HEVC but it also suffers from huge computational complexity. In this paper, we simplify the RDOQ tool in HEVC by enforcing more zero levels at high frequency locations without sacrificing coding efficiency much. First, we analyze the properties of each quantized level at different frequency locations. Subsequently, we set the quantized level of value 1 to 0 at specified high frequency locations to save the RDOQ processing time. In addition, a smaller round offset for quantization is adaptively used to minimize coding loss at high frequency locations. Our scheme is shown to reduce total quantization time by an average of 15.6% with only 0.01% loss in BDBR under the all intra coding configuration, and 13.17% of average time saving with 0.07% BDBR loss under the Random Access configuration.
KW - HEVC
KW - rate-distortion optimized quantization (RDOQ)
KW - simplified RDOQ
UR - https://www.scopus.com/pages/publications/85052396507
U2 - 10.1109/BMSB.2018.8436887
DO - 10.1109/BMSB.2018.8436887
M3 - Conference contribution
AN - SCOPUS:85052396507
SN - 9781538647295
T3 - IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, BMSB
BT - 2018 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, BMSB 2018
PB - IEEE Computer Society
T2 - 13th IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, BMSB 2018
Y2 - 6 June 2018 through 8 June 2018
ER -