The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2003
Filed:
Nov. 11, 1999
Brian William Kroeger, Sykesville, MD (US);
Branimir Vojcic, Annandale, VA (US);
Raymond L. Pickholtz, Fairfax, VA (US);
Ashruf El-Dinary, Clarksville, MD (US);
Ibiquity Digital Corporation, Columbia, MD (US);
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.