Masayuki Nishiguchi

TL;DR: A sound processing apparatus includes a sound determination portion that determines whether an input sound includes a first sound emitted from a particular source based on location information of the source, and a sound separation portion operable to separate the input sound into the first sound and a second sound emitting from a source different from the particular source.

TL;DR: In this paper, a method and a device for discriminating a voiced sound from an unvoiced sound or background noise in speech signals are disclosed, where each block or frame of input speech signals is divided into plural sub-blocks and the standard deviation, effective value or the peak value is detected in a detection unit for detecting statistical characteristics from one sub-block to another.

TL;DR: A method and apparatus for encoding an input signal, such as a broad-range speech signal, in which a number of decoding operations with different bit rates are enabled for assuring a high encoding bit rate and for minimizing deterioration of the reproduced sound even with a low bit rate.

TL;DR: In this paper, an autocorrelation is used on the parameters of the code books, and a signal obtained by up-sampling an linear predictive code residual is used as an exciting source at the time of audio synthesis.

TL;DR: In this article, the degree of similarity between an input vector and all code vectors stored in the codebook is found by approximation for pre-selecting a smaller plural number of code vectors.