Patent ID: 8532314
Filing Date: 2013-09-10
Classification: H03G

Abstract:
1. An audio volume control circuit, for generating an adjustment gain value for adjusting a plurality of audio channel data of a plurality of audio channels, the circuit comprising: a signal intensity calculating circuit, for receiving the audio channel data to generate a first signal intensity value of signal intensity for the audio channel data; a low-pass filter, for low-pass filtering the first signal intensity value to generate a second signal intensity value; a weight averaging unit, for receiving the second signal intensity value, and averaging the second signal intensity value and previous M−1 second signal intensity values associated with previous M−1 time points to obtain a third signal intensity value, where M is a natural number greater than 1; a gain calculating circuit, for obtaining an original gain value according to the third signal intensity value with reference to an adjustment condition; a buffer, for temporarily storing the audio channel data; and an audio volume adjusting circuit, for generating the adjustment gain value according to the original gain value, and adjusting the audio channel data according to the adjustment gain value, comprises: