Encoding method and apparatus using squished trellis codes
US6769091B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2001 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Jan 3, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/635
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A squished trellis encoder encodes blocks of information with unequal error correction. A multiplexing switch partitions the information block into a first portion and a second portion. A first trellis encoder encodes the first portion. A second trellis encoder encodes the second portion. An initial state information generator maps the states of the first trellis encoder to the second trellis encoder to establish initial conditions for the states of the second trellis encoder. A delay delays the second portion from processing by the second trellis encoder until the initial state information generator has mapped the states. An associated decoder can use the novel squished approach or other alternative approaches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.