130 What ever happened to MPEG-3 ?
Description
This article is from the MPEG FAQ, by Frank Gadegast phade@cs.tu-berlin.de with numerous contributions by others.
130 What ever happened to MPEG-3 ?
MPEG-3 was to have targeted HDTV applications with sampling dimensions
up to 1920 x 1080 x 30 Hz and coded bitrates between 20 and 40
Mbit/sec. It was later discovered that with some (syntax compatible)
fine tuning, MPEG-2 and MPEG-1 syntax worked very well for HDTV rate
video. The key is to maintain an optimal balance between sample rate
and coded bit rate.
Also, the standardization window for HDTV was rapidly closing. Europe
and the United States were on the brink of committing to
analog-digital subnyquist hybrid algorithms (D-MAC, MUSE, et al). By
1992, European all-digital projects such as HD-DIVINE and VADIS
demonstrated better picture quality with respect to bandwidth using the
MPEG syntax. In the United States, the Sarnoff/NBC/Philips/Thomson
HDTV consortium had used MPEG-1 syntax from the beginning of its
all-digital proposal, and with the exception of motion artifacts (due
to limited search range in the encoder), was deemed to have the best
picture quality of all three digital proponents in the early 1993
bake-off. HDTV is now part of the MPEG-2 High-1440 Level and High Level
toolkit.
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