For externally clocked digital audio input, determining a valid clock and muting audio during synchronization
US7884741B2 · kind B2 · utility
0Cited by
7References
22Claims
0Family size
Assignee
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Key dates
| Filing date | May 3, 2010 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | May 3, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/10546
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for determining the existence of an external clock over a digital input port on a computer. In one embodiment, the external clock is validated, and a lock is performed when the clock is valid. Whenever a loss of the lock is detected, and, if a re-lock is likely, the apparatus is muted so that audio artifacts that would otherwise be heard are minimized. The methods and apparatus also provide automatic re-locking to the external clock when a sampling rate change is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.