Asymmetry detection apparatus, jitter detection apparatus, and recording/reproduction apparatus
US6807134B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2000 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Jul 14, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An asymmetry detection apparatus includes: a clock signal generator for generating a clock signal based on a reproduced signal; an A/D converter for sampling the reproduced signal in synchronization with the clock signal; a determiner for determining whether a level of each of a plurality of sampled data obtained by the sampling operation is equal to or greater than a predetermined level; and a detector for detecting asymmetry in the reproduced signal by using predetermined ones of the sampled data based on an output from the determiner. A jitter detection apparatus includes: a clock signal generator for generating a clock signal based on a reproduced signal; an A/D converter for sampling the reproduced signal in synchronization with the clock signal; a determiner for determining whether a level of each of a plurality of sampled data obtained by the sampling operation is equal to or greater than a predetermined level; and a detector for detecting jitter in the reproduced signal by using predetermined ones of the plurality of sampled data based on an output from the determiner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.