Audience rating system for digital television and radio
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United States of America Patent
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May 11, 2004
Issued Date -
N/A
app pub date -
Apr 12, 1999
filing date -
May 27, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An audience rating system for digital television and radio, using identification codes in control streams of time-multiplexed digital transmissions. When a television set or radio, that is being monitored pursuant to the system, is turned on and tuned into a channel, and each time that the channel is changed, an identification code for each audio, video or auxiliary digital stream of the channel is extracted from the control stream, and recorded along with the time. In the first preferred embodiment, the multiplexed digital transmission is received separately by the television set or radio (or an attached IRD) and a meter connected to it. In the second preferred embodiment, the meter does not receive the multiplexed digital transmission separately, but has access to elementary streams extracted from the transmission by an IRD, and extracts identification codes for the channels being received from their elementary streams.
First Claim
Family
International Classification(s)
Cited Art Landscape
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