Delphi Technologies, Inc.

Delco Electronics Corporation

William E Dyson

Glenn A Walker

Jerral A Long

Michael Thomas Augustyn

J Alexander Easley

Gary K Mitchell

Joseph Robert Dockemeyer, Jr

A satellite-based digital audio radio (SDAR) receiver is configured to temporarily store data that may be transmitted to the SDAR receiver at a time inconvenient to the subscriber. A memory arrangement buffers data output by a channel decoder. The SDAR receiver can use the buffered data prior to using any currently transmitted data. The buffered data is associated with buffered timing information that lags behind the current timing information associated with the currently transmitted data. The buffered data is available for use only once before a decryption subsystem receives the current timing information. If the subscriber uses the currently transmitted data, the decryption subsystem receives the current timing information. The decryption subsystem decrypts only data that is associated with timing information that is no earlier than the latest timing information received by the decryption subsystem. Accordingly, the buffered data becomes unavailable once the decryption subsystem receives the current timing information.

Time-shifting data in digital radio system

In an automotive radio system an amplifier is capable of detecting speaker faults. A fault signal from the amplifier is received by a microprocessor which sends a fault message to a radio display and/or stores fault data which can be accessed via a serial data link by a diagnostic tool. One embodiment of the amplifier has an output pin for outputting distortion signal, and that pin is used when distortion is not likely to also output a fault signal which reveals the presence of a fault. Another embodiment of the amplifier has a data storage register which receives data on the type of fault and the affected channel, and a data bus to send the data to the microprocessor.

Method and apparatus for indicating speaker faults

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Carmel, IN, United States of America

William E Dyson