Receiver monitoring system with local encoding

DETAILED DESCRIPTION In accordance with one aspect of the present invention, an audience measurement system meters tuning of a receiver which receives a plurality of program signals transmitted over a plurality of channels.
The receiver is located at an audience site within a dwelling, and the plurality of program signals enter the dwelling at a service entrance and are supplied therefrom to the audience site.
The audience measurement system includes a code inserter, a decoder, and a data collector and memory.
The code inserter inserts a code in each of the program signals at a location which is intermediate the service entrance and the audience site.
The code includes a unique local code inserter ID and a code inserter time stamp.
The decoder decodes the unique local code inserter ID and the code inserter time stamp at the audience site.
The data collector and memory is located within the dwelling and collects and stores the decoded unique local code inserter ID and code inserter time stamp.
The collector and memory communicates the decoded unique local code inserter ID and code inserter time stamp to a remote site.
In accordance with another aspect of the present invention, an audience measurement system meters tuning of a receiver.
The receiver receives a first plurality of program signals transmitted over a plurality of channels and a second plurality of program signals transmitted over a plurality of channels.
The receiver is located at a first audience site within a dwelling.
The first plurality of program signals enters the dwelling through a first service entrance and is supplied therefrom to the audience site.
The second plurality of program signals enters the dwelling through a second service entrance and is supplied therefrom to the audience site.
The audience measurement system includes first and second code inserters, a decoder, and a data collector and memory.
The first code inserter inserts a code in each of the first plurality of program signals at a location which is intermediate the first service entrance and the audience site