Operation where the bitrate varies with time during the decoding of a
Although variable bit rate is acceptable for plain
linear playback, one important consideration not to use variable bit rate
is that reasonably quick random access becomes nearly impossible.
There is no table of contents or index in MPEG.
The only tool the play back system has for approximating the correct byte
position is the requested play back time stamp and the bit rate of the
MPEG stream. MPEG streams do not encode their play back time. To approximate
an intermediate position in a variable bit rate stream, the play back
system must grope around near the end of the stream to calculate the playback
time, and assume the stream is approximately constant bit rate. The groping
around for the correct position can take several seconds.
VLC (Variable Length Coding)
A reversible procedure for coding that assigns shorter code-words to frequent
events and longer code-words to less frequent events.
File extension of TwinVQ files.
© 1999-2000 Gabriel
Bouvigne for MP3'Tech - www.mp3tech.org