Transmission and receiver system operating on multiple audio programs
DCFirst Claim
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1. An apparatus for generating analog audio signal, comprising:
- a demodulator for retrieving digital data from wireless radio frequency signal, the digital data comprising a first set of compressed digital audio data associated with a first audio program and a second set of compressed digital audio data associated with a second audio program, the first set of compressed digital audio data having been compressed outside of the apparatus from a first set of digital audio data, the second set of compressed digital audio data having been compressed outside of the apparatus from a second set of digital audio data;
a first decompressor comprising a first digital audio decompression algorithm;
a second decompressor comprising a second digital audio decompression algorithm;
a user interface allowing a user to select the first or the second audio program; and
a control subsystem for applying the first decompressor to decompress the first set of compressed digital audio data if the user selects the first audio program and applying the second decompressor to decompress the second set of compressed digital audio data if the user selects the second audio program.
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Abstract
A receiver contains a demodulator system that can extract digital data from wireless radio frequency signal. The digital data contains two sets of compressed digital audio data corresponding to two audio programs. The receiver also contains two decompressors. If a user selects a first audio program, a first compressor is used to decompress a first set of compressed digital audio data. If a user selects a second audio program, a second decompressor is used to decompress a second set of compressed digital audio data. The wireless radio frequency signal can be transmitted using a transmitter.
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Citations
25 Claims
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1. An apparatus for generating analog audio signal, comprising:
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a demodulator for retrieving digital data from wireless radio frequency signal, the digital data comprising a first set of compressed digital audio data associated with a first audio program and a second set of compressed digital audio data associated with a second audio program, the first set of compressed digital audio data having been compressed outside of the apparatus from a first set of digital audio data, the second set of compressed digital audio data having been compressed outside of the apparatus from a second set of digital audio data; a first decompressor comprising a first digital audio decompression algorithm; a second decompressor comprising a second digital audio decompression algorithm; a user interface allowing a user to select the first or the second audio program; and a control subsystem for applying the first decompressor to decompress the first set of compressed digital audio data if the user selects the first audio program and applying the second decompressor to decompress the second set of compressed digital audio data if the user selects the second audio program. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 25)
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- 11. An apparatus for sending wireless radio frequency signal to a receiving device, the apparatus comprising a wireless transmitter for transmitting the wireless radio frequency signal modulated by a stream of digital data, the stream of digital data comprising a first set of compressed digital audio data associated with a first audio program and a second set of compressed digital audio data associated with a second audio program, the first set of compressed digital audio data having been compressed outside of the receiving device using a first digital audio compression algorithm and the second set of compressed digital audio data having been compressed outside of the receiving device using a second digital audio compression algorithm.
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18. An apparatus for generating analog audio signal, comprising:
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a demodulator for retrieving digital data from wireless radio frequency signal, the digital data comprising a first set of compressed digital audio data associated with a first audio program and a second set of compressed digital audio data associated with a second audio program the first set of compressed digital audio data having been compressed outside of the apparatus from a first set of digital audio data, the second set of compressed digital audio data having been compressed outside of the apparatus from a second set of digital audio data; a first decompressor comprising a first digital audio decompression algorithm; a second decompressor comprising a second digital audio decompression algorithm; a memory system for storing the first set of compressed digital audio data retrieved from the demodulator and not the second set of compressed digital audio data retrieved from the demodulator; user interface allowing a user to select the first or the second audio program; and a control subsystem for applying the second decompressor to decompress the second set of compressed digital audio data if the user selects the second audio program and for retrieving the first set of compressed digital audio data from the memory system and delivering to the first decompressor when the user selects the first audio program. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification