Audio system
US8139446B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2004 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Jan 19, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2400/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio system includes a key input section and a microcomputer, and enables playback volume level control that will meet the demand of a user. The key input section inputs a selection instruction for selecting one of a plurality of sound sources in response to a manipulation. The microcomputer 6, in cooperation with a level adjusting ratio setting library, a level adjusting pattern generator and a volume adjuster, selects the sound source designated by the selection instruction, calculates the level difference ΔP between the playback volume level of the sound data of the current piece of music and that of the next piece of music of the selected sound source, and adjusts the playback volume level of the next sound data in accordance with an adjusting ratio corresponding to the level difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.