Method and apparatus for forward error correction coding for an AM in-band on-channel digital audio broadcasting system
US6523147B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 1999 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Nov 11, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H2201/20
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method for digital audio broadcasting comprises the steps of providing a plurality of bits of digital information to be transmitted, interleaving the bits of digital information into a plurality of partitions, forward error correcting the bits of digital information using a combination of pragmatic trellis code modulation and complementary punctured code, and transmitting the bits of digital information. The partitions include a main partition, a backup partition, an upper partition, and a lower partition, wherein the upper partition and lower partition are non-overlapping. The main partition overlaps both of the upper and lower partitions and the backup partition overlaps both of the upper and lower partitions. The interleaved bits comprise a core interleaver and an enhancement interleaver. The forward error correcting is accomplished by representing the bits as independently coded in-phase and quadrature signals, applying a first error correcting code to the in-phase signals, and applying a second error correcting code to the quadrature signals. Receivers for processing the broadcast signals are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.