MP3 / Digital Formats White Papers
Analysis and Improvement of the MPEG-1 Audio Layer III Algorithm at Low Bit-Rates
Overview In this digital era, music is “mobile” and the de-facto quality of compressed audio is expected to be indistinguishable from a Compact Disc (CD). But, high fidelity and a small bit-stream are two mutually exclusive properties. Designing a compression algorithm that obtains the best compromise between fidelity and size is a challenging undertaking. This has been a subject of extensive research for the past fifteen years and many algorithms, all of them incorporating sophisticated models of human perception, have been proposed. The most popular of these is the MPEG-1 Layer III Audio format, i.e., MP3 for the layman. The contributions of this study are two- fold. First, a graphical simulation tool, implementing the entire standard in MATLAB, has been developed. This is used to introduce perceptual audio coding concepts in senior undergraduate and graduate Digital Signal Processing (DSP) courses. The tool is accompanied by a series of computer experiments and exercises that can be used to provide hands-on training to class participants.
| Publisher | MP3-Tech | File Format | PDF, requires Acrobat Rdr 5 |
|---|---|---|---|
| Date Published | December 2001 | Downloads | 671 |
| Format | White Papers | ||
| Topics | |||
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