Title of Invention | DIGITAL AUDIO BROADCASTING METHOD USING PUNCTURABLE CONVOLUTIONAL CODE |
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Abstract | This invention relates to a bropadcasting method encodes program material using convolutional codes having non-puncturable bits and puncturable bit and modulates orthogonal frequency division multiplexed carrier signals with the convolutional codes. The non-puncturable bits are carried by a first group of the carriers and the puncturable bits are carried by a second group of the carriers, where the first group of carrier signals is less susceptible to interfernce than the second group of carrier signals. The carrier signals are then broadcast to receivers which determine if the carriers in the second group have been corrupted and erase puncturable bits carried by any of the carriers which have been determined to be corrupted. This produces punctured codes which are subsequently decoded to recover the program material. |
Full Text |
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Patent Number | 210354 | ||||||||||||
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Indian Patent Application Number | IN/PCT/2000/00344/KOL | ||||||||||||
PG Journal Number | 40/2007 | ||||||||||||
Publication Date | 05-Oct-2007 | ||||||||||||
Grant Date | 03-Oct-2007 | ||||||||||||
Date of Filing | 22-Sep-2000 | ||||||||||||
Name of Patentee | IBIQUITY DIGITAL CORPORATION | ||||||||||||
Applicant Address | 8865 STANFORD BOULEVARD, SUITE 202 COLUMBIA, MARYLAND 21045, U.S.A. | ||||||||||||
Inventors:
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PCT International Classification Number | H 04 H 1/00 | ||||||||||||
PCT International Application Number | PCT/US99/04329 | ||||||||||||
PCT International Filing date | 1999-02-24 | ||||||||||||
PCT Conventions:
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