Digital sound broadcasting receiver and automatic phase controlling method therefor

U.S. Patent Number: 5867503

Abstract: A digital sound broadcasting receiver and method receives a radio wave from a digital sound broadcasting station, demodulates the radio wave into baseband signals at a tuner, subjects the signals to demodulation, performs error detection and error correction at signal processors to obtain digital data, and inputs the digital data into an audio circuit to obtain audio or data output. A CRC error rate detector 13 for a fast information channel (FIC) for APC pseudo lock releasing action on demodulating the signals is arranged to determine, based on the possibility of an error rate of an error-detecting code (CRC) of the FIC, whether an APC pseudo lock state occurs, and to control releasing action for the APC pseudo lock state.

Inventors: Ohsuga; Yoshiharu (Tokyo, JP), Tsujishita; Masahiro (Tokyo, JP), Ohkubo; Tadatoshi (Tokyo, JP), Taura; Kenichi (Tokyo, JP)

Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP)

Application Number: 08/785,506

Issued: 1999-02-02

Expired: 2007-02-02

Classes: 714/704 ; 375/269

Field of search: 371/5.1,5.2,5.4,5.5,42,47.1,57.1,61,62,46 370/203,204,205,330,343,478 375/329,334,269,293,294,362,371

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