Generating bit-streams with higher compression gains
US7218263B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Oct 8, 2004 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Oct 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/302
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system (10) and method that generate bit-streams that result in higher compression gains. The system is akin to a normal 1-bit SDM. Internally, the system (10) tries to find the best possible bit sequence by tracing N possible solutions at every time instant. In an implementation, the system has N>I trellis path structures (20). Every path is used to track a possible output bitstream. The quality of a bitstream is determined by measuring the (frequency weighted) difference between input and output; it is this measure that is reduced or minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.