Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1993-03-16
1995-04-11
Kuntz, Curtis
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 80, 381 81, H04R 2700
Patent
active
054066344
ABSTRACT:
An intelligent speaker unit is controlled by control data transmitted with the digital audio data. The intelligent speaker has a Digital Signal Processor (DSP) for processing the audio data in accordance with the control data. The control data contains an address to select the speaker unit. The DSP for the speaker unit processes audio data digitally based on parameters in the control data. The processed digital audio data is then converted to an analog signal which is amplified and applied to the speaker. The digital audio data is time division multiplexed on a TDM bus. Each time slot on the TDM bus contains audio data for one digital audio channel. The control data is placed on the TDM bus as one channel (time slot) or is distributed as control bits through all the other channels. The control data also contains channel select data. Accordingly the DSP in a selected speaker unit may in turn select its audio data from a plurality of audio channels based on the control data the DSP receives. Further, the DSP may mix the selected audio channels by accumulating the audio data from the selected channels. Further, the control data contains audio control data for volume, speaker equalization and sound delay.
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Anderson Charles W.
Melanson John L.
Zwiebel Richard C.
Kelly Mark D.
Knearl Homer L.
Kuntz Curtis
Peak Audio, Inc.
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