Downsampling and prefilter implementation in television systems
US4700345A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1985 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Feb 4, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2218/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A filter for filtering analog or digital samples using two sections, each including a multiplier stage having a plurality of multiplier sections, each with a respective output but a common input for applying a plurality of coefficients to a sample input to the multiplier stage, and a delay and summing network comprising a plurality of delay sections and alternate summing networks connected in series, the output of one of the multiplier sections being connected to the first delay sections in the series with each output of the other multiplier sections being connected to a respective summing network, the delay and summing network of one section being interleaved in series with the delay and summing network of the other section, and further comprising means for omitting alternate samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.