Method of entering audio signal, method of transmitting audio signal, audio signal transmitting apparatus, and audio signal receiving and reproducing apparatus
US6658310B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Nov 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S1/007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of entering an audio signal into a data processing apparatus, in which analog audio signals of at least two channels as the 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. A clock signal is supplied from the audio signal input device to the audio signal output device. The audio signal output device performs delta-sigma (&Dgr;&Sgr;) modulation on the analog audio signals of at least two channels so as to convert each of the analog audio signals of at least two channels into one-bit digital audio data for each of the at least two channels, based on the clock signal supplied to the audio signal output device. The one-bit digital audio data for the each channel is alternately selected based on the clock signal, to perform time-division multiplexing on the one-bit digital audio data for the at least two channels, to thereby produce one-bit multiplex audio data. The one-bit multiplex audio data is supplied to the audio signal input device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.