TY - GEN
T1 - Adaptive quantization parameter cascading for random-access prediction in H.265/HEVC based on dependent R-D models
AU - Yang, Yuan
AU - Wan, Shuai
AU - Gong, Yanchao
AU - Yang, Kaifang
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/8/3
Y1 - 2016/8/3
N2 - In H.265/HEVC, the random-access prediction structure helps to increase the coding efficiency and provides the temporal scalability. However, the quantization parameter cascading (QPC) strategy being used is not optimized in terms of the rate-distortion performance. This paper analyzes the rate and distortion dependency between temporal layers, and proposes a PSNR metric-based distortion model and a piecewise rate model to optimize the QPC. Experimental results demonstrate that the proposed algorithm achieves an average APSNR gain of 0.12dB with the maximum APSNR gain being 0.37dB. Meanwhile, an up to 8.7% BD-rate reduction with the average BD-rate reduction being 3.3% can be obtained.
AB - In H.265/HEVC, the random-access prediction structure helps to increase the coding efficiency and provides the temporal scalability. However, the quantization parameter cascading (QPC) strategy being used is not optimized in terms of the rate-distortion performance. This paper analyzes the rate and distortion dependency between temporal layers, and proposes a PSNR metric-based distortion model and a piecewise rate model to optimize the QPC. Experimental results demonstrate that the proposed algorithm achieves an average APSNR gain of 0.12dB with the maximum APSNR gain being 0.37dB. Meanwhile, an up to 8.7% BD-rate reduction with the average BD-rate reduction being 3.3% can be obtained.
KW - H.265/HEVC
KW - Quantization parameter cascading
KW - Random access prediction structure
KW - Rate and distortion dependency
KW - Rate-distortion optimization
UR - http://www.scopus.com/inward/record.url?scp=85006822879&partnerID=8YFLogxK
U2 - 10.1109/ICIP.2016.7533158
DO - 10.1109/ICIP.2016.7533158
M3 - 会议稿件
AN - SCOPUS:85006822879
T3 - Proceedings - International Conference on Image Processing, ICIP
SP - 4235
EP - 4239
BT - 2016 IEEE International Conference on Image Processing, ICIP 2016 - Proceedings
PB - IEEE Computer Society
T2 - 23rd IEEE International Conference on Image Processing, ICIP 2016
Y2 - 25 September 2016 through 28 September 2016
ER -