Method and apparatus for converting a low dynamic range analog signal to a large dynamic range floating-point digital representation
US6538593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2002 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Feb 28, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An analog-to-digital conversion scheme allows the conversion of a small dynamic range analog signal into a floating-point, digital representation with a larger dynamic range. A montonically changing analog signal is reset to a reference value at time t=0. The analog signal is then sub-converted by an analog-to-digital converter with maximum input signal level Ss to corresponding digital representations at several sub-conversion times t=T2>T1, t=T3>T2, . . . t=TM>TM−1, where TM≦T. These digital representations are then suitably combined to produce a cumulative, floating-point digital representation which accurately represents the analog signal even if the analog signal has a value greater than Ss at time t=T.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.