Voice activity detection method of voice signal processing coder using energy and LSP parameter

摘要

The present invention relates to a voice activity detection method using energy and LSP parameters in a method of lowering a transmission rate in a silent section in a voice signal processing encoder.;The first step of calculating the average energy for the frame by Voice Activity Detection, and comparing the calculated average energy and the noise level is determined as voiced sound if the average energy is greater than the noise level, otherwise A second step of determining an unvoiced or silent section, and a third step of determining using the minimum and maximum values of the LSP interval to consider a case where the signal-to-noise ratio (SNR) is low when the voice is determined in the above step, and an average In order to consider the case where the energy of the voice is small when the energy is smaller than the noise level, a method comprising the fourth step of determining the maximum interval and the minimum interval of the LSP is proposed.