Patent ID: 7403627
Filing Date: 2008-07-22
Classification: H03G,H04S

Abstract:
1. An audio mixing apparatus with dynamic-range control and used to transform an input signal to an output signal, comprising: a gain attenuation unit used to attenuate a first input signal with a predetermined ratio; a downmix unit used to mix an output signal of the gain attenuation unit; a rectification unit used to inversely rectify a second input signal and produces an absolute value for the second input signal; a power gain computing unit used to calculate the power gain of an output signal of the rectification unit; and a gain adjusting unit used to adjust an output audio signal of the gain adjustment unit by the absolute value of the downmix unit and an output of the power gain compute unit; whereby the first input signal is inputted into the gain attenuation unit and the downmix unit for producing an output signal to the gain adjustment unit; the second input signal is processed by the rectification unit and the power gain compute unit to produce a gain value, then the gain value is inputted the gain value to the gain adjustment unit; the gain adjusting unit adjusts and outputs an output gain based on the gain value.