Enlarged Block Sizes and Motion Search Ranges for High Definition Video Coding

A rate-distortion (R-D) model is derived to investigate the potential coding gain from the use of a larger macroblock size for high definition (HD) video coding in this work. Coding rates of using different block sizes for HD video coding are compared with the R-D model, and limitations of the current coding techniques that might impede the additional R-D gain of using enlarged MB for HD coding are explained. Experiments show that an average bit rate gain of 27 % across QP range can be achieved by using enlarged MB and extended motion search range. Keywords --Digital cinema, high definition video, macroblock size, rate distortion model, search range

• Type: Conference
• Year: 2007
• Where: ICIP
• Authors: Yunyang Dai, Qi Zhang, Siwei Ma, C. C. Jay Kuo
• Keywords: Additional R-d Gain, Current Coding Techniques, HD Coding, HD Video Coding, ICIP 2007, Image Processing, Potential Coding Gain