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:
Jan. 21, 1997
Filed:
Aug. 22, 1994
Applicant:
Inventors:
Axel Haupt, Langenhagen, DE;
Karl-Hermann Delibruegge, Hannover, DE;
Assignee:
Sennheiser electronic KG, Wedemark, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375242 ; 275246 ; 275253 ; 370345 ; 370470 ; 371 371 ;
Abstract
Infrared light is used in a device for wireless transmission of digital data, e.g. in headphones. In order to satisfy the strict requirements regarding compactness and power consumption, it is proposed that three digital stereo sampling values are encoded in data frames of 128-bit length for channel coding. Control characteristics and synchronizing characteristics are added to these data frames. A special coding rule is used for the sampling value coding.