Method and apparatus for compressing signals in a fixed point format without introducing a bias
US6148317A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1998 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Aug 14, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/49963
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for compressing fixed point signals without introducing a bias. Signals are compressed according to a dithered rounding approach wherein signal values are rounded up and rounded down with approximately equal probability, canceling the bias that would otherwise result from the rounding operation. Numerical properties of the input signal are exploited in order to determine whether the signal value should be rounded up or down. Signal compression may, therefore, be introduced at multiple points within a system without accumulating a signal bias and degrading downstream performance. Further, one bit signal compression may be achieved in a particularly efficient fashion with a minimal amount of hardware.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.