由 JCP 發表於 週二 3月 20, 2001 8:02 pm
有一位網友在我的網站上音樂討論區轉貼一篇文章,可以作為壓高音質mp3的參考。
-V0 -b160 -mj --athlower 5
It is important to NOT USE CRC CHECK! This wastes bits.
Options explained:
-V0 is the highest quality variable bit rate (VBR) encoding algorithm. In my extensive testing, VBR outperforms constant bit rate (CBR) encoding. VBR can dynamically adapt to more demanding music to provide a higher quality mp3 by encoding difficult frames with higher bitrates and encoding less difficult frames with lower bitrates. You can see VBR at work when you encode using
this method.
-b160 sets the MINIMUM bitrate.
-mj sets LAME to use variable stereo/joint stereo encoding. Depending upon the stereo sound field, LAME can intelligently decide what method will produce the best quality. At any given bitrate, -mj will encode with higher quality than -ms (fixed stereo) because it encodes the DIFFERENCE between
channels, thereby saving more bits to apply towards the information contained in each channel.
--athlower 5 increases the sensitivity of the encoding algorithm and increases the amount of data being compressed. The ATH is the perceptual encoding algorithm that decides what is important audible nformation and what is not.