NDLI: When is bit allocation for predictive video coding easy?

Content Provider	IEEE Xplore Digital Library
Author	Sermadevi, Y. Jun Chen Hemami, S.S. Berger, T.
Copyright Year	2005
Description	Author affiliation: Sch. of Electr. & Comput. Eng., Cornell Univ., Ithaca, NY, USA (Sermadevi, Y.; Jun Chen; Hemami, S.S.; Berger, T.)
Abstract	This paper addresses the problem of bit allocation among frames in a predictively encoded video sequence. Finding optimal solutions to this problem potentially requires making an exponential number of calls to the encoder. To better understand the structure of the rate-distortion data output by video encoders, a simple model of a sequentially encoded autoregressive Gaussian random field is theoretically investigated. The rate-distortion data for the model exhibits an additive-separability property, i.e. the rate can be decomposed into a sum of independent functions of single distortion variables. This property implies the near-optimal behavior of a non-backtracking steepest-descent (SD) based bit allocation algorithm. The SD algorithm when applied to video coding produces near-optimal solutions by making a linear number of calls to the encoder. Results are presented for MPEG-2 encoding of standard video sequences.
Sponsorship	Brandeis Univ
Starting Page	289
Ending Page	298
File Size	410667
Page Count	10
File Format	PDF
ISBN	0769523099
ISSN	10680314
DOI	10.1109/DCC.2005.96
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-03-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bit rate Video coding Rate-distortion Encoding Quantization Video sequences Rate distortion theory Data compression Prediction algorithms MPEG 4 Standard
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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