POST-PROCESSOR FOR PROCESSING DIGITAL AUDIO DATA ON-THE-FLY, APPRATUS AND METHOD FOR OUTPUTTING DIGITAL AUDIO DATA ON-THE-FLY

摘要

A postprocessor for processing digital audio data on the fly, an apparatus for outputting digital audio data on the fly, and a method thereof are provided to shorten the delay time required for audio processing by processing inputted digital audio data on the fly according to a channel mode control signal and a volume level control signal. A postprocessor(300) comprises a mixer part(310) and a volume adjustment part(320). The mixer part(310) processes inputted audio PCM(Pulse Code Modulation) data(301) on the fly according to a channel mode control signal(302). The volume adjustment part(320) adjusts the volume level of the processed audio PCM data according to a volume level control signal(303) and outputs the volume-adjusted audio PCM data(304). The mixer part(310) comprises the first buffer(311), the second buffer(312), an adder(313), the third buffer(314), and an output part(315). The inputted audio PCM data(301) are 2-channel data containing right channel data and left channel data. The 2-channel data are stored in the first buffer(311) and the second buffer(312). The adder(313) adds the output data of the first buffer(311) to the output data of the second buffer(312) and creates mix data. The created mix data are stored in the third buffer(314). The output part(315) outputs selected data among the inputted audio PCM data(301), the output data of the first buffer(311), the output data of the second buffer(312), the output data of the adder(313), and the output data of the third buffer(314).