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:
Jul. 05, 2011
Filed:
Aug. 07, 2003
Mohsen Sarraf, Rumson, NJ (US);
Mohammad Hossein Zarrabizadeh, Woodbridge, NJ (US);
Mohsen Sarraf, Rumson, NJ (US);
Mohammad Hossein Zarrabizadeh, Woodbridge, NJ (US);
Alcatel-Lucent USA Inc., Murray Hill, NJ (US);
Abstract
A method and apparatus increase the time and frequency diversity of a multi-stream signal in a DAB system. A plurality of audio streams are divided into four (4) digital sub-streams, C, C, C, and C. Each sub-stream C, C, C, and Cis assigned a unique frequency band, and time slot. A first core sub-stream Cis mapped to one frequency partition and a second core sub-stream Cis mapped to another frequency partition and delayed relative to the first core sub-stream. Similarly, two enhancement sub-streams Cand Care mapped to different frequency partitions and are time delayed relative to each other and the core sub-streams. The two core sub-streams Cand Ccan have a maximum separation across both the time and frequency axes.