Sampling rate converting apparatus
US5204827A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1991 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0102
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sampling rate converting apparatus is arranged in such a manner that, in a case where the frequency ratio of a first or a second sampling frequency holds a simple integral relationship, its oversampling filters are composed of FIR type digital filters the length of each of which corresponds to the least common multiple of the frequency ratio so that the first or the second sampling frequency of the digital signal is converted into the second or the first sampling frequency. A sampling rate converting apparatus is arranged in such a manner that coefficients to be given to weighting means of oversampling filters are changed by selecting coefficient data of coefficient generating means including a plurality of selectable coefficient data so that, in a case where the frequency ratio of the first or the second sampling frequency does not hold a simple integral relationship, the first or the second sampling frequency of the digital signal can be converted into the second or the first sampling frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.