How Does MP3 Throw Out 90% of The Music? The "13dB Miracle"
April 24 - We take for granted that music can be encoded digitally in the MP3 or Dolby Digital formats with about one-tenth the number of bits required for conventional CD-quality audio. But how can we throw out literally 90% of the information and still recognize the music?
The technique is properly called "perceptual coding,
" because it relies on the human hearing mechanism to work. In fact
