Pitch shift method with conserved timbre

Details Pitch shift method with conserved timbre Pitch shift method with conserved timbre

1996-11-19

1999-02-16

Elmore, Reba I.

Boots, shoes, and leggings

36471502, 381 61, 381 63, 84603, 84604, 84607, 84622, 84623, G06F 1710, G10H 700, G10H 106

Patent

active

058727272

ABSTRACT:
An improved method for shifting the pitches of a tone is disclosed. It comprises: (a) subjecting a digitized original waveform to a whitening process using an all-zero filter (AZF) to obtain a whitened waveform; (b) resampling the whitened waveform at a desired scaling ratio to obtain a scaled and whitened waveform; (c) subjecting the scaled and whitened waveform to a coloring process using an all-pole filter (APF) to obtain a synthesized waveform. In a preferred embodiment, the all-zero filter performs the transformation function of: ##EQU1## and the all-pole filter performs the transformation function of: ##EQU2## wherein the a.sub.i 's and b.sub.i 's are linear predictive coefficients. The whitened waveforms can be compressed and stored as wavetables, which can be subsequently retrieved and decompressed before resampling.

REFERENCES:
patent: 4729112 (1988-03-01), Millar
patent: 4782324 (1988-11-01), Underwood
patent: 4916996 (1990-04-01), Suzuki et al.
patent: 5288940 (1994-02-01), Izumisawa
patent: 5495432 (1996-02-01), Ho
patent: 5567901 (1996-10-01), Gibson et al.
patent: 5637821 (1997-06-01), Izumisawa et al.
patent: 5641926 (1997-06-01), Gibson et al.
patent: 5693901 (1997-12-01), Matsungawa
patent: 5698807 (1997-12-01), Massie et al.
patent: 5777249 (1998-07-01), Suzuki

Affiliated with

Also associated with

Rating

Pitch shift method with conserved timbre does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pitch shift method with conserved timbre, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pitch shift method with conserved timbre will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2067914