Patent ID: 6658310
Filing Date: 2003-12-02
Classification: G11B,H04H,H04S

Abstract:
A method of entering an audio signal into a data processing apparatus, wherein analog audio signals of two channels as said audio signal are digitized by and transmitted from an audio signal output device on a side of an audio source to an audio signal input device on a side of the data processing apparatus, comprising the steps of:a) supplying a clock signal from said audio signal input device to said audio signal output device via a first signal line; b) performing delta-sigma (&Dgr;&Sgr;) modulation on the analog audio signals of two channels in said audio signal output device so as to convert each of said analog audio signals of two channels into one-bit digital audio data for each of said two channels, based on said clock signal supplied to the audio signal output device and an inverted clock signal produced from said clock signal; c) alternatively selecting said one-bit digital audio data converted based on said clock signal, according to said inverted clock signal, and said one-bit digital audio data converted based on said inverted clock signal, according to said clock signal, in said audio signal output device, to perform time-division multiplexing on the two one-bit digital audio data for said two channels, to thereby produce one-bit multiplex audio data; and d) supplying said one-bit multiplex audio data from said audio signal output device to said audio signal input device via a second signal line.