Patent ID: 8019094
Filing Date: 2011-09-13
Classification: H03G

Abstract:
1. An audio processing system with a function of automatic gain control, the system comprising: a storage unit for storing a plurality of audio files, and a gain setting table which lists a plurality of genre types with a genre gain value corresponding to each one of the genre types; a processing unit for fetching an audio file from the storage unit after receiving a playing command to play the audio file; a decoding unit for decoding the audio file and generating digital audio signals; a digital/analog converter for converting the digital audio signals to analog audio signals; and a gain managing unit comprising: an identifying module for reading a genre type of the audio file fetched from a tag of the audio file; an obtaining module for reading a genre gain value of the genre type from the gain setting table; a gain adjusting module for signaling a gain amplifier to amplify the analog audio signals received from the digital/analog converter by the genre gain value read, and for adjusting a default gain value stored in the storage unit to an adjusted gain value in response to a gain adjusting command; a calculating module for calculating an integrated gain value by assigning a weight value respectively to the genre gain value and the adjusted gain value, multiplying the genre gain value and the adjusted gain value by the corresponding weight value assigned, thereby obtaining two products, and summing the two products to obtain the integrated gain value; and an updating module for updating the genre gain value of the genre type in the gain setting table with the integrated gain value.