NDLI: A normalized rate-distortion model for H.263-compatible codecs and its application to quantizer selection

Content Provider	IEEE Xplore Digital Library
Author	Kyeong Ho Yang Jacquin, A. Jayant, N.S.
Copyright Year	1997
Abstract	This paper proposes a new normalized parametric rate-distortion model which can be efficiently applied to H.263-compatible video codecs and other codecs of similar type. The model is very efficient in terms of computational complexity and amount of required memory since it approximates all 31 rate-distortion relations (one for each quantization parameter QP) with only one curve by normalizing the energy of signals and the quantization distortion with functions of QP. We show how the model parameters can be obtained from experimental data. We also propose a quantizer selection scheme which uses the model to estimate the number of bits required for encoding 8/spl times/8 residual blocks. Experiments show that the model provides very good approximations of the rate and the distortion characteristics for all QPs, and that the proposed quantizer selection scheme works better than the scheme used in the MPEG-4 Video Verification Model Version 5.1.
Starting Page	41
Ending Page	44
File Size	388293
Page Count	4
File Format	PDF
ISBN	0818681837
DOI	10.1109/ICIP.1997.638668
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	Rate-distortion Quantization Quadratic programming Video codecs Computational complexity Encoding Rate distortion theory MPEG 4 Standard
Content Type	Text
Resource Type	Article

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