Method and apparatus for transmission and reception of compressed audio frames with prioritized messages for digital audio broadcasting

A transmitter for a digital audio broadcasting system comprising:

• means for receiving digital information representative of an audio signal;
• means for estimating the number of bits to be allocated to said digital information in a modem frame;
• means for encoding said digital information within the estimated number of bits to produce encoded data;
• means for adding bits corresponding to digital messages to said encoded information to form a composite modem frame;
• means for formatting said composite modem frame bits to produce formatted composite modem frame bits;
• and
• means for transmitting the formatted composite modem frame bits.

A transmitter for a digital audio broadcasting system comprising:

• an input for receiving digital information representative of an audio signal;
• a processor for estimating the number of bits to be allocated to said digital information in a modem frame, for encoding said digital information within the estimated number of bits to produce encoded data, for adding bits corresponding to digital messages to said encoded information to form a composite modem frame, and for formatting said composite modem frame bits to produce formatted composite modem frame bits;
• and
• an antenna for transmitting the formatted composite modem frame bits.

A method for transmitting and receiving compressed data for a digital audio broadcasting system comprising the steps of:

• receiving digital information representative of an audio signal;
• estimating a number of bits to be allocated to said digital information in a modem frame;
• encoding said digital information within the estimated number of bits to produce encoded data, and receiving digital messages;
• adding bits corresponding to digital messages to said encoded information to form a composite modem frame;
• formatting said composite modem frame bits to produce formatted composite modem frame bits;
• transmitting the formatted composite modem frame bits;
• receiving the modem frame bits;
• and
• producing an output in response to the modem frame bits.