Method and apparatus for performing voice activity detection

An audio signal processing device, comprising:

• a voice activity detection (VAD) apparatus and an audio signal processing unit controlled by a voice activity detecting decision (VADD) generated by the VAD apparatus,
• wherein the VAD apparatus has at least two different working states, each of the at least two different working states is associated with a corresponding working state parameter decision set (WSPDS), and each WSPDS includes at least one voice activity decision parameter (VADP), wherein the working states of the VAD apparatus comprise a normal working state and an offset working state;
• and
• wherein the VAD apparatus is configured to receive an input audio signal, determine a current working state of the VAD apparatus based on the input audio signal, calculate a value for the at least one VADP of the WSPDS associated with the current working state, generate a voice activity detection decision (VADD) by comparing the calculated VADP value with a threshold, and output the VADD.

A voice activity detection (VAD) method for use by a VAD apparatus, comprising:

• receiving an input audio signal;
• determining a current working state of the VAD apparatus based on the input audio signal, wherein the VAD apparatus has at least two different working states, each of the at least two different working states is associated with a corresponding working state parameter decision set (WSPDS), and each WSPDS includes at least one voice activity decision parameter (VADP);
• wherein the working states of the VAD apparatus comprise a normal working state and an offset working state;
• calculating a value for the at least one VADP of the WSPDS associated with the current working state;
• and
• generating a voice activity detection decision (VADD) by comparing the calculated VADP value with a threshold.