| 摘要 |
<p>A system comprises a refined psycho-acoustic modeler (122) for efficient perceptive encoding compression of digital audio. Percepetive encoding uses experimentally derived knowledge of human hearing to compress audio by deleting data corresponding to sounds which will not be perceived by the human ear. A psycho-acoustic modeler (122) produces masking information that is used in the perceptive encoding system to specify which amplitudes and frequencies may be safely ignored without compromising sound fidelity. The present invention includes a system and method for efficiently implementing a masking function in a psycho-acoustic modeler (122) in digital audio perceptive encoding. In the preferred embodiment, the present invention comprises a non-logarithmically based representation of individual masking functions utilizing minimally-sized look-up tables.</p> |
