Circuit arrangement for processing, transmitting, and acoustically reproducing digitized audio-frequency signals
First Claim
1. Apparatus for processing digitized audio frequency signals together with digital control signals, said digitized audio frquency signals being coded in a protected code, said apparatus comprising:
- a code processor receiving said digitized audio frequency signals, performing error correction and converting said digitized audio frequency signals to a non-redundant code to provide digital output signals at an output;
a signal processor receiving said digital output signals and said digital control signals, said signal processor combining said digital output signals with said digital control signals to provide serial digital output signals;
an RF modulator having an input receiving said serial digital output signals;
an infrared transmitter driven by said RF modulator;
an infrared receiver coupled to said infrared transmitter by a wireless link;
an RF demodulator coupled to the output of said receiver;
a digital to analog converter coupled to the output to said RF demodulator;
a power amplifier coupled to the analog output of said converter; and
a loudspeaker driven by said power amplifier.
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Accused Products
Abstract
Digitized audio-frequency signals are processed in a signal processor (SP) together with digital control signals and pass through a wireless infrared transmission link (I) whose receiver (E) and a following power amplifier (V) are incorporated in a loudspeaker box (B). The audio-frequency signals are coded in a protected code and are fed first to a code-conversion/error-correction processor (CP), then to the signal processor (SP), and then to an RF modulator (M) which drives the transmitter (S) of the transmission link (I).
In a modification, the code-conversion/error-correction processor (CP) and the signal processor (SP) are disposed within the loudspeaker box (B'"'"'), so that errors arising on the transmission link (I) can be compensated for.
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Citations
36 Claims
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1. Apparatus for processing digitized audio frequency signals together with digital control signals, said digitized audio frquency signals being coded in a protected code, said apparatus comprising:
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a code processor receiving said digitized audio frequency signals, performing error correction and converting said digitized audio frequency signals to a non-redundant code to provide digital output signals at an output; a signal processor receiving said digital output signals and said digital control signals, said signal processor combining said digital output signals with said digital control signals to provide serial digital output signals; an RF modulator having an input receiving said serial digital output signals; an infrared transmitter driven by said RF modulator; an infrared receiver coupled to said infrared transmitter by a wireless link; an RF demodulator coupled to the output of said receiver; a digital to analog converter coupled to the output to said RF demodulator; a power amplifier coupled to the analog output of said converter; and a loudspeaker driven by said power amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Apparatus for processing, transmitting and acoustically reproducing digitized audio frequency signals together with digital control signals, said digitized audio frequency signals and said digitized control signals being coded in a protected code, said arrangement comprising:
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an RF modulator combining said digitized audio frequency signals and said digital control signals and providing modulation signals; an infrared transmitter driven by said RF modulator; an infrared receiver coupled to said infrared transmitter by a wireless link; an RF demodulator coupled to the output of said receiver; a code processor coupled to the output of said RF demodulator for performing error correction and converting the output signals of said RF demodulator into output digital audio signals and output digital control signals both encoded in a nonredundant code; a signal processor receiving said digital audio signals and said output digital control signals and operating on said output digital audio signals in accordance with said output digital control signals to provide digital output signals; a digital to analog converter coupled to said signal processor to convert said digital output signals to analog signals at an output; a power amplifier coupled to the output of said digital to analog converter; and a loudspeaker driven by said power amplifier. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. Apparatus for processing first digitized audio frequency signals together with digital control signals, said first digitized audio frequency signals and said digital control signals being coded in a protected code said arrangement comprising:
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a multiplexer for multiplexing said first digitized audio frequency signals with other digital audio frequency signals to provide second digitized audio frequency signals; an RF modulator combining said second digitized audio frequency signals and said digital control signals and providing modulation signals; an infrared transmitter driven by said RF modulator; an infrared receiver coupled to said infrared transmitter by a wireless link; an RF demodulator coupled to the output of said receiver; a code processor coupled to the output of said RF demodulator for performing error correction and converting the output signals of said RF demodulator into output digital audio signals and output digital control signals both encoded in a non redundant code; a signals processor receiving said digital audio signals and said output digital control signals and operating on said digital audio signals in accordance with said output digital control signals to provide digital output signals; a digital to analog converter coupled to said signal processor to convert said digital output signals to analog signals at an output; a power amplifier coupled to the output of said digital to analog converter; and a loudspeaker driven by said power amplifier. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification