Patent ID: 6937870

Claim:
A method for performing a wireless interactive transaction using a wireless telephone handset comprising the steps of: forming a digitally coded query signal which is separate from an audio-band content to be broadcast; converting said digitally coded query signal into an audio-band query signal; injecting said audio-band query signal into said audio-band content to produce a combined audio-band signal; transmitting said combined audio-band signal on an audio channel; receiving said combined audio-band signal from said audio channel by a device which is separate from the wireless telephone handset; conveying said received combined audio-band signal from said separate device to said wireless telephone handset; processing said combined audio-band signal conveyed from said separate device at the wireless telephone handset to reproduce the digitally coded query signal and to decode instructions coded therein when forming said digitally coded query signal; and controlling said wireless telephone handset to respond to said decoded instructions.