초록 ▼

A method and apparatus for detecting end points of speech activity in an input signal using spectral representation vectors performs beginning point detection using spectral representation vectors for the spectrum of each sample of the input signal and a spectral representation vector for the steady

A method and apparatus for detecting end points of speech activity in an input signal using spectral representation vectors performs beginning point detection using spectral representation vectors for the spectrum of each sample of the input signal and a spectral representation vector for the steady state portion of the input signal. The beginning point of speech is detected when the spectrum diverges from the steady state portion of the input signal. Once the beginning point has been detected, the spectral representation vectors of the input signal are used to determine the ending point of the sound in the signal. The ending point of speech is detected when the spectrum converges towards the steady state portion of the input signal. After both the beginning and ending of the sound are detected, vector quantization distortion can be used to classify the sound as speech or noise.

대표청구항 ▼

A method of detecting speech activity in a data input stream comprising the steps of: (a) generating a set of spectral representation vectors to represent the data input stream, wherein each spectral representation vector of the set of spectral representation vectors represents a predetermined porti

A method of detecting speech activity in a data input stream comprising the steps of: (a) generating a set of spectral representation vectors to represent the data input stream, wherein each spectral representation vector of the set of spectral representation vectors represents a predetermined portion of the data input stream; (b) generating a steady state spectral representation vector indicative of the state of the data input stream at a first predetermined portion of the data input stream; (c) comparing a spectral representation vector corresponding to the first predetermined portion of the data input stream to the steady state spectral representation vector; (d) determining a first end point of speech activity when the set of spectral representation vectors diverges from the steady state spectral representation vector; and (e) determining a second end point of speech activity when a predetermined number of spectral representation vectors of the set of spectral representation vectors are within a predetermined distance of the steady state spectral representation vector for a continuous predetermined period of time.