NDLI: Forward/backward adaptive context selection with applications to motion vector field encoding

Content Provider	IEEE Xplore Digital Library
Author	Wenqing Jiang Ortega, A.
Copyright Year	1997
Description	Author affiliation: Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA (Wenqing Jiang)
Abstract	In low rate motion-compensated video coding, the rate required to encode the motion field can become a significant portion of the overall rate budget. This motivates us to investigate methods to efficiently, and losslessly, encode the motion field. Reductions in the required motion field bit rate allow increasing the rate for the residue images or may permit a higher density motion field to be used. We consider adaptive context modeling techniques, such as those proposed in image coding applications, and explore their effectiveness for coding the motion data. We rely on various forward/backward context selection algorithms, and demonstrate how forward adaptation, based on alphabet partitioning approaches, can result in performance improvements over purely backward adaptive methods. We observe substantial reductions in rate, especially for dense motion fields, when comparing with popular differential coding schemes using VLC tables, such as those in the H.263 standard.
Starting Page	168
Ending Page	171
File Size	505055
Page Count	4
File Format	PDF
ISBN	0818681837
DOI	10.1109/ICIP.1997.638703
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-10-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image coding Video coding Bit rate Context modeling Partitioning algorithms
Content Type	Text
Resource Type	Article

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