Signal processing apparatus and signal processing method
US7592941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2007 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Dec 28, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02165
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Disclosed herein is a signal processing apparatus including: analog-to-digital conversion means for performing delta sigma modulation of generating a digital signal having a predetermined sampling frequency and a predetermined quantization bit rate of one or more bits based on an input analog signal; signal processing means including a digital filter having a characteristic for outputting a digital signal having a sampling frequency n×Fs (Fs is a reference sampling frequency) and a quantization bit rate of a bits (a is a natural number greater than one) based on the above digital signal; and digital-to-analog conversion means including a part for performing delta sigma modulation for outputting a digital signal having a sampling frequency n×Fs and a quantization bit rate of b bits (b is a natural number greater than zero and less than a) based on a digital signal outputted from the signal processing means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.