초록 ▼

A method and apparatus for generating frame voicing decisions for an incoming speech signal having periods of active voice and non-active voice for a speech encoder in a speech communications system. A predetermined set of parameters is extracted from the incoming speech signal, including a pitch ga

A method and apparatus for generating frame voicing decisions for an incoming speech signal having periods of active voice and non-active voice for a speech encoder in a speech communications system. A predetermined set of parameters is extracted from the incoming speech signal, including a pitch gain and a pitch lag. A frame voicing decision is made for each frame of the incoming speech signal according to values calculated from the extracted parameters. The predetermined set of parameters further includes a frame full band energy, and a set of spectral parameters called Line Spectral Frequencies (LSF).

대표청구항 ▼

[ What is claimed is:] [8.] A Voice Activity Detector (VAD) for making a voicing decision on an incoming speech signal frame, the VAD comprising:an extractor for extracting a set of parameters, including pitch gain and pitch lag, from the incoming speech signal for each frame;a calculator unit for c

[ What is claimed is:] [8.] A Voice Activity Detector (VAD) for making a voicing decision on an incoming speech signal frame, the VAD comprising:an extractor for extracting a set of parameters, including pitch gain and pitch lag, from the incoming speech signal for each frame;a calculator unit for calculating a standard deviation of the pitch lag from the extracted parameters over a consecutive number of subframes and a long term mean pitch gain from the extracted parameters; anda decision unit for making a frame voicing decision according to the results from the calculator unit.