Sampling frequency converting apparatus
US5925093A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1997 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Oct 7, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0628
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sampling frequency converting apparatus according to present invention is such an apparatus in which, when a first digital signal of a sampling frequency Fsi is converted into a second digital signal of an arbitrary sampling frequency Fso by using a digital filter, the ratio between the sampling frequency Fsi and the sampling frequency Fso is obtained and this input/output sampling frequency ratio is utilized as a control amount for the sampling frequency conversion. The sampling frequency converting apparatus includes a buffer memory for temporarily storing the first digital signal, an operating unit for performing an interpolation processing with respect to the input/output sampling frequency ratio at every regular time and a calculating unit which calculates a read address of the buffer memory on the basis of the input/output sampling frequency ratio interpolated by the operating unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.