Receiving system operating on multiple audio programs
First Claim
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1. A method for a radio receiver to deliver analog audio signal, comprising:
- demodulating radio frequency signal to obtain a stream of digital data, the digital data comprising at least a first and a second audio program, the first audio program comprising a first set of compressed digital audio data compressed using a first compression ratio, the second audio program comprising a second set of compressed digital audio data compressed using a second compression ratio, the second compression ratio being higher than the first compression ratio;
determining a selection of one of the audio programs by a user;
if the user selects the first audio program, decompressing the first set of compressed digital audio data to generate a first set of decompressed digital data and converting the first set of decompressed digital data to a first analog signal; and
if the user selects the second audio program, decompressing the second set of compressed digital audio data to generate a second set of decompressed digital data and converting the second set of decompressed digital data to a second analog signal.
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Abstract
A receiver contains a demodulator system that can deliver a stream of digital data comprising at least a first and a second audio program. If a user selects the first audio program, the receiver applies a first bit rate decompression to generate a stream of decompressed digital data. If the user selects the second audio program, the receiver applies a second bit rate decompression to generate a different stream of decompressed digital data. A digital to analog converter can be used to generate the corresponding analog signals.
65 Citations
20 Claims
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1. A method for a radio receiver to deliver analog audio signal, comprising:
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demodulating radio frequency signal to obtain a stream of digital data, the digital data comprising at least a first and a second audio program, the first audio program comprising a first set of compressed digital audio data compressed using a first compression ratio, the second audio program comprising a second set of compressed digital audio data compressed using a second compression ratio, the second compression ratio being higher than the first compression ratio; determining a selection of one of the audio programs by a user; if the user selects the first audio program, decompressing the first set of compressed digital audio data to generate a first set of decompressed digital data and converting the first set of decompressed digital data to a first analog signal; and if the user selects the second audio program, decompressing the second set of compressed digital audio data to generate a second set of decompressed digital data and converting the second set of decompressed digital data to a second analog signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A radio receiver for delivering analog audio signal, comprising:
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a tuner; a demodulator coupled to the tuner for generating a stream of digital data, the digital data comprising at least a first and a second audio program, the first audio program comprising a first set of compressed digital audio data compressed using a first compression ratio, the second audio program comprising a second set of compressed digital audio data compressed using a second compression ratio, the second compression ratio being higher than the first compression ratio; a user interface allowing a user to select one of the first and the second audio programs; a module for receiving the stream of digital data and generating decompressed digital data, the module decompressing the first set of compressed digital audio data if the user selects the first audio program and decompressing the second set of compressed digital audio data if the user selects the second audio program; and a digital to analog converter for generating the analog audio signal in response to the decompressed digital data. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification