A method and apparatus are provided for a first controlled device, such as
a wireless local transmitter that accepts a plurality of digital audio
signals and corresponding program information signals converted from a
controlled source, such as the encoded digital data provided by a digital
data signal source, typically a community antenna television (CATV) cable
or direct broadcast satellite, then modulates said digital audio and
corresponding program information signals on different carrier
frequencies and transmits the modulated signals to a plurality of second
controlled devices, such as remote digital receiver/tuners that
demodulate said signals to output music in stereophonic sound and display
the corresponding program information by means of an alphanumeric
display. The first and second controlled devices contain microprocessor
systems for communicating, controlling, storing, processing, and display
of digital data within the operation of the respective system. A high
speed, error free digital signal protocol is utilized for transmitting
digital audio and corresponding program information signals to and from
the digital receiver/tuner. The digital data transmitter and digital
receiver/tuners utilize the 44.1 kilohertz (kHz) Compact Disc (CD) clock
signal embedded in digital audio signals provided by an established
delivery system to derive clocking signals for reception and processing
of digital audio signals and for implementing the display information
communications protocol.