Method and apparatus for converting an input scanning sequence into an output scanning sequence
US4825398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1984 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Oct 9, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0226
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for converting an input scanning sequence into an output scanning sequence, where scan values of an input scanning sequence occurring with an input scanning frequency are converted into an output scanning sequence whose scan values occur with an output scanning frequency. To process scanning sequences with alternating scanning frequencies with limited computing and storage capacities, a single one-stage digital filter is provided for processing the input scanning sequence using a limited number of filter coefficients, further filter coefficients supplied thereto by calculation from existing filter coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.