Pulse or digital communications – Receivers – Amplitude modulation
Reexamination Certificate
2011-05-17
2011-05-17
Ha, Dac V (Department: 2611)
Pulse or digital communications
Receivers
Amplitude modulation
C455S130000, C375S259000
Reexamination Certificate
active
07944998
ABSTRACT:
A system that blends a hybrid radio signal may provide reduced audio content skipping and may determine an audio correlation between analog and digital signal components in the hybrid radio signal before blending from the analog signal component to the digital signal component. The system may reduce volume level transitions during blending by adjustment of blend and cross-fade variables, as well as setting a hysteresis mode to prevent undesirable sequential jumping from digital mode back to analog mode. The system also may compensate for digital AM frequency quality issues by adjustment of a filter bandwidth when the receiver blends an AM signal from analog to digital mode.
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Pavlov Nicolai
Shridhar Vasant
Spellman Mark
Brinks Hofer Gilson & Lione
Ha Dac V
Harman International Industries Incorporated
Stevens Brian J
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