某日，小爱同学发给我一个
帖子链接，问VBR比CBR要好？
我说，嗯。。。好像参数有点怪，记得好像不是这样的。
遂，查阅之。发现LAME的参数也是变化好大啊，多了好多新参数。
然后，发现一些有趣的东西。
*NOTE* No psy-model is perfect, so
there can often be distortion which
is audible even though the psy-model claims it is not! Thus using a
small minimum bitrate can result in some aggressive compression and
audible distortion even with -V 0. Thus using -V 0 does not sound
better than a fixed 256 kbps encoding. For example:
suppose in the 1 kHz
frequency band the psy-model claims 20 dB of distortion will not be
detectable by the human ear, so LAME VBR-0 will compress that
frequency band as much as possible and introduce at most 20 dB of
distortion. Using a fixed 256 kbps framesize, LAME could end up
introducing only 2 dB of distortion. If the psy-model was correct,
they will both sound the same. If the psy-model was wrong, the VBR-0
result can sound worse.
[/TX] [/TX] [/TX] 看来vbr和cbr之间的选择，又要迷茫了。
