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:
May. 13, 2003
Filed:
Aug. 03, 1999
Kiyoshi Nomura, Kanagawa, JP;
Shigeru Kaneko, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A digital broadcast receiver for determining the actual transmission mode of a Digital Audio Broadcast (DAB) signal with a delay circuit for delaying a received DAB signal is provided. With a correlation circuit for correlating a delay output of the delay circuit with the received DAB signal a moving average circuit for calculating a moving average of a correlation output of the correlation circuit. A transmission mode is assumed to be one of a plurality of transmission modes. The delay time of the delay circuit is set at a time corresponding to a symbol time length of the assumed transmission mode. The number of times that the output of the moving average circuit exceeds a prescribed value is counted. Based on counting results, the actual transmission mode is identified based on the maximum number of times that the output of the moving average circuit exceeds the prescribed value.