Abstract:
Since the early 1990s, MediaCheck and others have been talking about coding programs and commercials with inaudible identification codes and developing new systems for measuring TV and radio audiences through the use of portable, passive meters. How close are we? How much further do we have to go?
This could also be of interest:
Research Papers
TV audience measurement around the world
Catalogue: ESORMAR/ARF Worldwide Electronic And Broadcast Audience Research 1994
Authors: Bill Harvey, Ken Purdye
 
May 1, 1994
Research Papers
Progress toward passive measurement of print
Catalogue: ESOMAR/ARF WAM Conference 2004: Print
Authors: Roberta M. McConochie, Jane Bailey
 
June 15, 2004
Research Papers
Passive VS. button pushing
Catalogue: ESOMAR/ARF WAM Conference 2004: Television
Authors: Ken Purdye, Pasquale A. Pellegrini
 
June 18, 2004
