METHOD FOR PROCESSING AND REPRODUCING AUDIO SIGNAL AT DESIRED SOUND QUALITY, REDUCED DATA VOLUME OR ADJUSTED OUTPUT LEVEL, APPARATUS FOR PROCESSING AUDIO SIGNAL WITH SOUND QUALITY CONTROL INFORMATION OR TEST TONE SIGNAL OR AT REDUCED DATA VOLUME, RECORDING MEDIUM FOR RECORDING AUDIO SIGNAL WITH SOUND QUALITY CONTROL INFORMATION OR TEST TONE SIGNAL OR AT REDUCED DATA VOLUME, AND APPARATUS FOR REPRODUCING AUDIO SIGNAL AT DESIRED SOUND QUALITY, REDUCED DATA VOLUME OR ADJUSTED OUTPUT LEVEL
US6725111B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Mar 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S1/007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital audio signal obtained from an analog audio signal indicating a music, pieces of audio reproduction control information respectively indicating the adjustment of a sound quality of the music are added to the digital audio signal, and the digital audio signal is recorded with the pieces of audio reproduction control information as packed data. When a user selects a piece of particular audio reproduction control information from the pieces of audio reproduction control information after the packed data is read out, levels of pieces of audio data of the digital audio signal are adjusted according to the particular audio reproduction control information, so that the user can entertain the music at a desired sound quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.