Method and apparatus for detecting voice activity by using signal and noise power prediction values

摘要

A robust method and apparatus to detect voice activity based on the power level of an audio frame. The method may include performing primary active/non-active voice period determination of an input audio frame according to a power level of the audio frame, extracting a noise power prediction value and a signal power prediction value by referring to power levels of current and previous audio frames according to a primary active/non-active voice period determination value, and performing secondary active/non-active voice period determination for the input audio frame by comparing the extracted signal power prediction value with the extracted noise power prediction value.

主权项

1. A method of detecting voice activity, the method comprising:
performing primary active/non-active voice period determination of an input audio frame according to a power level of a current audio frame to generate a primary active/non-active voice period determination value indicating whether the current audio frame has an active or non-active voice period; extracting a noise power prediction value and a signal power prediction value of the input audio frame by referring to power levels of current and previous audio frames according to the primary active/non-active voice period determination value; performing secondary active/non-active voice period determination of the input audio frame by comparing the extracted signal power prediction value with the extracted noise power prediction value; and filtering the secondary active/non-active voice period determination values to smooth consecutive periods between frames in which the active/non-active voice change.