Electrical audio signal processing systems and devices – With amplifier
Reexamination Certificate
2011-04-19
2011-04-19
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
With amplifier
C381S123000, C381S058000, C700S094000
Reexamination Certificate
active
07929718
ABSTRACT:
Systems and methods for scaling the number of output channels that can be provided in an audio amplification system. In one embodiment, a digital pulse width modulation (PWM) amplification system includes multiple four-channel PWM controller chips that are interconnected to enable synchronization and transfer of digital audio data from one chip to another. Input audio signals received by each of the channels are processed by sample rate converters to generate internal audio signals that have a predetermined sample rate and format. Each of the channels is synchronized so that the internal audio signal of each channel can be processed and output by any of the other channels. The PWM controller chips are connected by a high-speed interconnect that enables the transfer of data between them. Each input audio signal can be mapped to any of the outputs and can be mixed with other input signals.
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Preliminary Amend
Andersen Jack B.
Gephardt Douglas D.
Hand Larry E.
Chin Vivian
D2Audio Corporation
Fliesler & Meyer LLP
Monikang George
LandOfFree
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