Decoding equalizer
US4949168A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1988 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Sep 19, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A decoding equalizer of high definition television signal transmission mode, such as MUSE, and a subrange-type A/D converter suitable for the equalizer. The decoding equalizer samples input data in equalization at a frequency twice the sampling frequency of the trunk system, with the equalizing A/D converter operating at a lower resolution and higher speed than the A/D converter for the trunk system. The subrange-type A/D converter includes A/D converters in multiple stages, with their driving clock frequencies having a specified relationship so that they are used commonly for the A/D conversdion of the high definition television signal and the A/D conversion of a test signal for detecting the transmission characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.