Harman Becker Automotive Systems Gmbh

Andreas Körner

Christoph Benz

Philipp Schmauderer

Stefan Gierl

Tobias Münch

Karl-Anton Becker

Olaf Axtmann

A system for decoding a stereo multiplex signal, including one or more devices operable to convert the stereo multiplex signal into a sum signal (L+R) and a difference signal (L&#x2212;R). The sum signal and the difference signal may be derived from a left stereo signal (L) and right stereo signal (R). The system may also be operable to determine a first transfer function H(f) and a second transfer function (H(f)) from the sum signal (L+R) and the difference signal (L&#x2212;R). Further, the system may be operable to filter the sum signal (L+R) according to the first transfer function to provide the left stereo signal (L), and filter the sum signal (L+R) according to the second transfer function to provide the right stereo signal (R).

Stereo decoding system

A system for controlling audio reproduction may include an interface operable to receive a data stream of an audio signal. The system may also include a processor. The processor may be operable to: analyze the data stream; divide the data stream into segments; associate audio classes with respective segments in accordance with audio classifications and the analysis of the data stream; and replace one or more of the segments associated with a specific audio class, with an audio file, based on information regarding the audio file and information regarding the specific audio class. Further, the system may include another interface operable to output a signal derived from the audio file, to drive a loudspeaker.

System for controlling audio reproduction

A receiving device for mobile reception of a receive signal including an audio signal associated with a currently received piece of music, and a method for playback in a mobile receiver are disclosed. A receiving circuit receives the receive signal and outputs the audio signal and information associated with the audio signal. The information includes one or more information fields associated with the currently received piece of music. An arithmetic unit evaluates the information associated with the audio signal. A database is configured for storing database entries. Each database entry includes data fields and associated audio data. The arithmetic unit assigns the information to an assigned database entry by comparing the information fields with the data fields. The arithmetic unit outputs the audio data of the assigned database entry based on a detected disturbance in the reception of the audio signal.

Receiving device and a method for playback in a mobile receiver

A radio receiver may determine whether a received frequency modulated radio signal includes interference from an adjacent channel. The receiver may compare a frequency deviation above the center frequency of the received signal to a frequency deviation below the center frequency of the received signal. The receiver determines that the radio signal is affected by adjacent channel noise when the frequency deviation below the center frequency is substantially different from the frequency deviation above the center frequency. Alternatively, the presence of noise from an adjacent channel may be detected by comparing a positive amplitude and a negative amplitude of a demodulated version of the frequency modulated radio signal. In this alternative, the receiver determines that the radio signal is affected by adjacent channel noise when the extent of the positive amplitude is substantially different from the extent of the negative amplitude.

Signal analysis for an improved detection of noise from an adjacent channel

A system for decoding data, such as travel and traffic information, configured in data blocks embedded in an electromagnetic signal, such as a broadcasted radio signal, has been developed. The system includes a method and receiver for decoding the data with a background tuner in a manner that does not impair the ability of the background tuner to demodulate other signals. While a main tuner is tuned to demodulate a first electromagnetic signal to produce a data stream, the background tuner is switched to decode the data blocks only when the data blocks are expected to be received. In the remaining time, the background tuner is free to demodulate other signals to support a diversity or other function. If a data block is not received, or not received when expected, the background tuner returns to demodulating one or more other frequencies after a predetermined time interval has elapsed.

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Waldbronn, Germany

Andreas Körner