Multi-mode decoding for digital audio broadcasting and other applications
US6874115B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2000 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | Mar 16, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Techniques are disclosed for processing received information in a communication system, such that performance is significantly improved in the presence of certain types of interference, e.g., partial-band interference. In an illustrative embodiment, first and second digital sidebands are transmitted on either side of an AM or FM host carrier signal in a hybrid in-band on-channel (HIBOC) digital audio broadcasting (DAB) system. The compressed digital audio information in the sidebands is encoded using an error correcting code such as a Reed-Solomon (RS) code. A receiver attempts to detect interference within a designated portion of a given one of the sidebands. If the interference is detected, the receiver eliminates the portion of the frequency band from consideration in the decoding process by using a fixed-erasure decoding (FED) technique to decode the error correcting code. If the interference is not detected, the receiver utilizes the designated portion of the sideband in the decoding process by using a hard-decision decoding (HDD) technique. Advantageously, this multi-mode approach of the present invention provides significantly reduced complexity relative to conventional maxi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.