Joint preamble and code rate identifier in a mobile DTV system
US9391741B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2009 |
| Grant date | Jul 12, 2016 |
| Priority date | — |
| Expiry date | Jun 16, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/26136
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A joint preamble and code rate identifier flag in a reserved portion of a data field synchronization segment in a digital television (DTV) data field identifies the presence of preamble training data in a forward error correction (FEC) encoded portion of the DTV data field. The identifier flag also indicates the code rate used for the data field. The data field synchronization segment is not FEC encoded, thereby allowing detection of the identifier flag without FEC decoding. The detection at a receiver of the identifier flag in a DTV data field allows receiver elements, such as an equalizer and a FEC decoder, to more readily obtain and utilize the preamble training data, thereby enhancing reception and/or simplifying receiver design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.