Method and apparatus for editing an audio signal

Details Method and apparatus for editing an audio signal Method and apparatus for editing an audio signal

1993-03-10

1996-01-09

MacDonald, Allen R.

395 221, 395 271, G10L 914

Patent

active

054836190

ABSTRACT:
An audio signal editing method and apparatus for use with original sound data which is already compressed and encoded in predictive form, for example ADPCM. To edit a desired portion from the original audio data, the method and apparatus reconstruct (encoded PCM) audio data from the original (ADPCM) audio data and encode a non-predictive unit to replace a first original audio data unit of the desired portion. Thus, the desired portion is rendered independent of preceding sample values, without having to be recoded entirely. An enhanced method and apparatus encode further replacement units to eliminate noise introduced by the basic method.

REFERENCES:
patent: 4691359 (1987-09-01), Morito
patent: 5243582 (1993-09-01), Yamauchi et al.
patent: 5347478 (1994-09-01), Suzuki et al.
The Full Motion System fn CD-I.
Jan Van der Meer IEEE/Nov. 1992.
A 16KB/S APC System with Adaptive postfilter and evaluation of its Performance Zarkadis et al. IEEE/Apr. 1988.

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