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Encoding

Digital code embedded in the station audio. Google "psychoacoustic masking" for numerous technical explanations. Basically low level audio hidden amongst the main program output. Your ears aren't able to discern it, but the PPM's can pick it up.
 
Mediafrog+ said:
Digital code embedded in the station audio. Google "psychoacoustic masking" for numerous technical explanations. Basically low level audio hidden amongst the main program output. Your ears aren't able to discern it, but the PPM's can pick it up.
Click to expand...

And the data, which consists of a time stamp and unique station code, are sent every 4.5 seconds, with the exception of moments of zero audio.
 
Some years from now somebody is going to play an aircheck of a defunct station in the presence of a PPM. The Arbitron folks will probably think the meter fell into a time warp...!
 
Mediafrog+ said:
Digital code embedded in the station audio. Google "psychoacoustic masking" for numerous technical explanations. Basically low level audio hidden amongst the main program output. Your ears aren't able to discern it, but the PPM's can pick it up.
Click to expand...

There is an engineer in San Francisco who swears he can hear the encoding in that market. Does anyone in Houston "hear" the encoding?
 
This sounds like subliminal messages... ;)

"A subliminal message is a signal or message embedded in another object, designed to pass below the normal limits of perception. These messages are indiscernible by the conscious mind, but in certain situations can affect the subconscious or deeper mind and later actions or attitudes."

Subliminal techniques have occasionally been used in advertising and propaganda; the purpose, the effectiveness, and the frequency of the application of such techniques is debated." --Wikipedia.
 
DavidEduardo said:
Mediafrog+ said:
Digital code embedded in the station audio. Google "psychoacoustic masking" for numerous technical explanations. Basically low level audio hidden amongst the main program output. Your ears aren't able to discern it, but the PPM's can pick it up.
Click to expand...

There is an engineer in San Francisco who swears he can hear the encoding in that market. Does anyone in Houston "hear" the encoding?
Click to expand...

I think I heard, "Paul is dead".
 
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