Rate-distortion optimization for video compression
Sullivan, G.J.
Wiegand, T.
PictureTel Corp., Andover, MA, USA;
This paper appears in: Signal Processing Magazine, IEEE
Publication Date: Nov 1998
Volume: 15,
Issue: 6
On page(s): 74-90
ISSN: 1053-5888
References Cited: 63
CODEN: ISPRE6
INSPEC Accession Number: 6116433
Digital Object Identifier: 10.1109/79.733497
Current Version Published: 2002-08-06
Abstract
The rate-distortion efficiency of video compression schemes is
based on a sophisticated interaction between various motion
representation possibilities, waveform coding of differences, and
waveform coding of various refreshed regions. Hence, a key problem in
high-compression video coding is the operational control of the encoder.
This problem is compounded by the widely varying content and motion
found in typical video sequences, necessitating the selection between
different representation possibilities with varying rate-distortion
efficiency. This article addresses the problem of video encoder
optimization and discusses its consequences on the compression
architecture of the overall coding system. Based on the well-known
hybrid video coding structure, Lagrangian optimization techniques are
presented that try to answer the question: what part of the video signal
should be coded using what method and parameter settings?
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