InterDigital Inc (IDCC)

[Gamco]

United States Patent 7,599,832
Lin , et al. October 6, 2009
Method and device for encoding speech using open-loop pitch analysis

Abstract
The present invention is a synthetic speech encoding device that produces a synthetic speech signal which closely matches an actual speech signal. The actual speech signal is digitized, and excitation pulses are selected by minimizing the error between the actual and synthetic speech signals. The preferred pattern of excitation pulses needed to produce the synthetic speech signal is obtained by using an excitation pattern containing a multiplicity of weighted pulses at timed positions. The selection of the location and amplitude of each excitation pulse is obtained by minimizing an error criterion between the synthetic speech signal and the actual speech signal. The error criterion function incorporates a perceptual weighting filter which shapes the error spectrum.

Inventors: Lin; Daniel (Montville, NJ), McCarthy; Brian M. (Lafeyette Hill, PA)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/363,807
Filed: February 28, 2006
Related U.S. Patent Documents
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10924398 Aug., 2004 7013270
10446314 Aug., 2004 6782359
10083237 Aug., 2003 6611799
09805634 May., 2002 6385577
09441743 Apr., 2001 6223152
08950658 Dec., 1999 6006174
08670986 Jun., 1996
08104174 Aug., 1993
07592330 Aug., 1993 5235670
Current U.S. Class: 704/219
Current International Class: G10L 19/12 (20060101)
Field of Search: 704/219