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 curre...

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Bibliographic Details
Main Authors: Yunyang Dai, Qi Zhang, Siwei Ma, Kuo, C.-C.J.
Format: Conference Proceeding
Language:English
Subjects:
Digital cinema
High definition video
macroblock size
rate distortion model
search range
Online Access:Request full text
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Description
Summary: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.
ISSN:1522-4880
2381-8549
DOI:10.1109/ICIP.2007.4379336