Method and device for converting a quantized digital value
US7046173B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2002 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Mar 19, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/1976
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention concerns a method and a device for converting an input digital value quantized in accordance with a first quantization factor and encoded on at most n1 bits, into an output digital value quantized in accordance with a second quantization factor and encoded on at most n2 bits. The method comprises the steps of: multiplying the input digital value by an integer B, encoded on at most β bits, so as to generate an intermediate digital value; and dividing, in fixed point, the first intermediate digital value by the number 2α, where α is an integer not greater than n1+β, generating the output digital value. The number B/2α is substantially equal to the ratio of the second quantization factor over the first quantization factor. Additionally, the divider means comprise a Sigma-Delta modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.