Method and apparatus for enabling transmission of variable length encoded data in a low signal to noise ratio environment
US6697435B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2002 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | May 31, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0078
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In order to transmit variable length encoded data in low signal to noise ratio environments, a first data pattern is added to a beginning portion of encoded data to signify a beginning of the encoded data. Further, a second data pattern is added to end portion of the encoded data to signify and end of the encoded data. Additionally, since the encoded data may naturally include the second data pattern and thereby mistakenly indicate an end of the encoded data, the encoded data is first checked for such a pattern. If the pattern is found within the encoded data, a new pattern is substituted therefore. In order to counter errors, patterns similar to the first data pattern are also substituted with new patterns. As such, a variable length encoded data can be transmitted in a low signal to noise ratio environment, and can thereafter be easily decoded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.