An interactive video system transmits a composite digital information signal consisting of a winnowed generic information signal and a local information signal manipulated to produce an output signal including both data code and object code. This output signal is formatted and transmitted via modulator cards at the system head end to decoders located at the individual users' television sets. Each card uses a dynamic gate array having a configuration sequence determined by a resident configuration EPROM which can be changed in the field. Data is fed to the configured array under the control of a control data EPROM also resident in the modulator card. A transmission modulator in the modulator card receives the data from the dynamic gate array for transmission via any selected medium to the user's location.