Blank detection circuit and method therefor
US6728180B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 20, 2000 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Apr 20, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2562
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A blank detection circuit and method which detects a blank of a reproduced signal read from a recording medium such as are optical disc and which includes an edge detector which detects edges of the reproduced signal and detects an interval between the detected edges, a maximum value/minimum value detector which detects an amplitude of the reproduced signal in response to the detected edges and provides a maximum value or a minimum value of the detected amplitude, and a determiner which determines whether the reproduced signal is the blank according to the inter-edge interval detected in the edge detector and/or the maximum value or minimum value detected in the maximum value/minimum value detector. Since a blank component of the reproduced signal read from the optical disc is quickly detected, and a blank signal is generated at an accurate point in time, reliability of the entire system is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.