Method of transmitting, at low throughput, a speech signal by ce

Details Method of transmitting, at low throughput, a speech signal by ce Method of transmitting, at low throughput, a speech signal by ce

1991-10-18

1993-07-06

Shaw, Dale M.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

381 30, 381 31, 381 34, 381 36, 381 37, G10L 502, G10L 302, G10L 500

Patent

active

052260852

ABSTRACT:
A method is provided for transmitting a digital speech signal at low throughput. Coding is performed by code excited linear prediction in order to generate a code signal, a waveform being represented by an initial vector (O) of dimension L, from a filter for synthesizing by a reference waveform selected from a dictionary of reference vectors (v), relating to a criterion of minimum deviation min .parallel..chi.-H.v.parallel..sup.2, .chi. representing a target vector through perceptual weighting of the initial vector (O). A dictionary (Y) factorized as a product of basis vectors yi of n-ary form, which are corrected by a scale factor .gamma.i of distribution of the excitation energy, and a dictionary G(y) of gains gk, are established to represent the dictionary of the reference vectors (v), vk, i=gk..gamma..yi. The criterion is established by calculating C(gk, .gamma.i.yi)=2gk<.chi..vertline.H..gamma.i.yi>-gk.sup.2 formed of the scalar products and perceptual energies. To the initial vector (O) is assigned the optimal reference vector vk*, i*=gk*..gamma.i.yi represented by just the index values k*, i*.

REFERENCES:
patent: 4736428 (1988-04-01), Deprettere et al.
patent: 4860355 (1989-08-01), Copperi
patent: 4868867 (1989-09-01), Davidson et al.
patent: 4899385 (1990-02-01), Ketchum et al.
patent: 4910781 (1990-03-01), Ketchum et al.
patent: 4932061 (1990-06-01), Kroon et al.
patent: 4944013 (1990-07-01), Gouvianakis et al.
patent: 4980916 (1990-12-01), Zinser
patent: 5091946 (1992-02-01), Ozawa

Affiliated with

Also associated with

Rating

Method of transmitting, at low throughput, a speech signal by ce does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of transmitting, at low throughput, a speech signal by ce, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of transmitting, at low throughput, a speech signal by ce will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1695865