Transmission and receiver system operating on different frequency bands

摘要

A receiver can extract digital data from wireless radio frequency signal. The digital data contains at least two sets of compressed digital audio data each associated with a different set of audio program. One set of compressed digital audio data is delivered in a first frequency band and the other set in a second frequency band. One of the sets is stored in a memory system and the remaining set is not stored in the memory system. A user can select one of the sets of compressed digital audio data for decompression and then conversion to analog audio signal.

主权项

1. A method for an apparatus to process digital audio data, comprising:
demodulating a wireless radio frequency signal in a first frequency band transmitted by a first remote station to generate first compressed digital audio data; storing the first compressed digital audio data in memory; demodulating a wireless radio frequency signal in a second frequency band transmitted by a second remote station to generate second compressed digital audio data, third compressed digital audio data, and a command instructing the apparatus to switch to a third remote station; storing the third compressed digital audio data in the memory; providing for the selection of the first or the third compressed digital audio data to allow for:
retrieving the selected first or the third compressed digital audio data from the memory;decompressing the retrieved compressed digital audio data to generate first decompressed digital audio data; andprocessing the first decompressed digital audio data to generate a first analog audio signal; providing for the selection of the second compressed digital audio data to allow for:
decompressing the second compressed digital audio data to generate second decompressed digital audio data; andprocessing the second decompressed digital audio data to generate a second analog audio signal; and responsive to the command: demodulating a wireless radio frequency signal transmitted by the third remote station to generate additional compressed digital audio data for processing to a third analog audio signal.