Search

Willem B Kleijn

from Batavia, IL
Age ~67
Get Report
Related to:
Kristi L Kleijn, 72
Connected to:
Dirk R Kleiman, 53Edward D Kleiman, 85Gabriel Kleiman, 86Hoffman H Kleiman, 82Jamie L Kleiman, 47Laurie K Kleiman, 67Lloyd W Kleiman, 77Mark D Kleiman, 53Nasha T Kleimann, 64Renee Kleiman, 39

Willem Kleijn Phones & Addresses

  • Batavia, IL

Publications

Us Patents

Source Dependent Channel Coding With Error Protection

View page
US Patent:
50919458, Feb 25, 1992
Filed:
Sep 28, 1989
Appl. No.:
7/414155
Inventors:
Willem B. Kleijn - Batavia IL
Assignee:
AT&T Bell Laboratories - Murray Hill NJ
International Classification:
G10L 918
US Classification:
381 36
Abstract:
A parameter communication arrangement where a parameter that is transmitted over a channel using m-bit codewords or labels is quantized before transmission as one of only p levels, where, significantly, p

Digital Speech Vocoder

View page
US Patent:
47979267, Jan 10, 1989
Filed:
Sep 11, 1986
Appl. No.:
6/906523
Inventors:
Edward C. Bronson - Lafayette IN
Walter T. Hartwell - St. Charles IL
Willem B. Kleijn - Batavia IL
Dimitrios P. Prezas - Park Ridge IL
Assignee:
American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ
International Classification:
G10L 500
US Classification:
381 36
Abstract:
A speech analyzer and synthesizer system using sinusoidal encoding and decoding techniques for voiced frames and noise excitation or multiple pulse excitation for unvoiced frames. For voiced frames, the analyzer transmits the pitch, values for each harmonic frequency by defining the offset from integer multiples of the fundamental frequency, total frame energy, and linear predictive coding, LPC, coefficients. The synthesizer is responsive to that information to determine the phase of the fundamental frequency and each harmonic based on the transmitted pitch and harmonic offset information and to determine the amplitudes of the harmonics utilizing the total frame energy and LPC coefficients. Once the phase and amplitudes have been determined for the fundamental and harmonic frequencies, the sinusoidal analysis is performed for voiced frames. For each frame, the determined frequencies and amplitudes are defined at the center of the frame, and a linear interpolation is used both to determine continuous frequency and amplitude signals of the fundamental and the harmonics throughout the entire frame by the synthesizer.

Code Excited Linear Predictive Vocoder

View page
US Patent:
48993859, Feb 6, 1990
Filed:
Jun 26, 1987
Appl. No.:
7/067649
Inventors:
Richard H. Ketchum - Wheaton IL
Willem B. Kleijn - Batavia IL
Daniel J. Krasinski - Glendale Heights IL
Assignee:
American Telephone and Telegraph Company - New York NY
AT&T Bell Laboratories - Murray Hill NJ
International Classification:
G10L 702
US Classification:
381 36
Abstract:
Apparatus for encoding speech using a code excited linear predictive (CELP) encoder using a recursive computational unit. In response to a target excitation vector that models a present frame of speech, the computational unit utilizes a finite impulse response linear predictive coding (LPC) filter and an overlapping codebook to determine a candidate excitation vector from the codebook that matches the target excitation vector after searching the entire codebook for the best match. For each candidate excitation vector accessed from the overlapping codebook, only one sample of the accessed vector and one sample of the previously accessed vector must have arithmetic operations performed on them to evaluate the new vector rather than all of the samples as is normal for CELP methods. For increased performance, a stochastically excited linear predictive (SELP) encoder is used in series with the adaptive CELP encoder. The SELP encoder is responsive to the difference between the target excitation vector and the best matched candidate excitation vector to search its own overlapping codebook in a recursive manner to determine a candidate excitation vector that provides the best match.

Digital Speech Sinusoidal Vocoder With Transmission Of Only Subset Of Harmonics

View page
US Patent:
47714654, Sep 13, 1988
Filed:
Sep 11, 1986
Appl. No.:
6/906424
Inventors:
Edward C. Bronson - Lafayette IN
Walter T. Hartwell - St. Charles IL
Thomas E. Jacobs - Cicero IL
Richard H. Ketchum - Wheaton IL
Willem B. Kleijn - Batavia IL
Assignee:
American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ
International Classification:
G10L 500
US Classification:
381 36
Abstract:
A speech analyzer and synthesizer system using a sinusoidal encoding and decoding technique for voiced frames and noise excitation or multipulse excitation for unvoiced frames. For voiced frames, the analyzer transmits the pitch, values for a subset of offsets defining differences between harmonic frequencies and a fundamental frequency, total frame energy, and linear predictive coding, LPC, coefficients. The synthesizer is responsive to that information to determine the harmonic frequencies from the offset information for a subset of the harmonics and to determine the remaining harmonics from the fundamental frequency. The synthesizer then determines the phase for the fundamental frequency and harmonic frequencies and determines the amplitudes of the fundamental and harmonics using the total frame energy and the LPC coefficients. Once the phase and amplitudes have been determined for the fundamental and harmonic frequencies, the synthesizer performs a sinusoidal analysis. In another embodiment, the remaining harmonic frequencies are determined by calculating the theoretical harmonic frequencies for the remaining harmonic frequencies and grouping these theoretical frequencies into groups having the same number as the number of offsets transmitted.

Code Excited Linear Predictive Vocoder Using Virtual Searching

View page
US Patent:
49107810, Mar 20, 1990
Filed:
Jun 26, 1987
Appl. No.:
7/067650
Inventors:
Richard H. Ketchum - Wheaton IL
Willem B. Kleijn - Batavia IL
Daniel J. Krasinski - Glendale Heights IL
Assignee:
AT&T Bell Laboratories - Murray Hill NJ
International Classification:
G10L 702
US Classification:
381 36
Abstract:
Apparatus for encoding speech using a code excited linear predictive (CELP) encoder using a virtual searching technique during speech transitions such as from unvoiced to voiced regions of speech. The encoder compares candidate excitation vectors stored in a codebook with a target excitation vector representing a frame of speech to determine the candidate vector that best matches the target vector by repeating a first portion of each candidate vector into a second portion of each candidate vector. For increased performance, a stochastically excited linear predictive (SELP) encoder is used in series with the adaptive CELP encoder. The SELP encoder is responsive to the difference between the target vector and the best matched candidate vector to search its own overlapping codebook in a recursive manner to determine a candidate vector that provides the best match. Both of the best matched candidate vectors are used in speech synthesis.
Control profile
Willem B Kleijn from Batavia, IL, age ~67 Get Report