116 Why is Constrained Parameters so important? (MPEG-2)
Description
This article is from the MPEG FAQ, by Frank Gadegast phade@cs.tu-berlin.de with numerous contributions by others.
116 Why is Constrained Parameters so important? (MPEG-2)
A. It is an optimum point that allows (just barely) cost effective
VLSI implementations in 1992 technology (0.8 microns). It also
implies a nominal guarantee of interoperability for decoders and a
reasonable class of performance for encoders. Since CPB is the most
popular canonical MPEG-1 conformance point, MPEG devices which are not
capable of at least meeting SIF rates are usually not considered to be
true MPEG by industry.
Picture buffers (i.e. "frame stores") and coded data buffering
requirements for MPEG-1 CPB fit just snugly into 4 Mbit of memory
(DRAM).
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