Radio broadcasters in so-called “PPM Markets” are faced with managing two signals for each station. One is the audio program that listeners hear; the other is the watermark signal heard by Personal People Meters (PPM)™. Broadcasters concerned with counting their listeners (all of them in a PPM market) must treat their watermark signal with similar care to their on-air audio. In this episode, Dr. Barry Blesser explains the science of audio watermarking. Then Paul Kriegler describes the Best Practices for making sure your watermark signal is consistently detected in the field.
- NAB Pilot – Examining Ratings Watermarks: Voltair and the PPM
- Audio Watermarking on Wikipedia
- We mentioned Kantar Audio Watermarking
- Audio Processing for Best On-Air Sound and for Watermark Encoding
- BRR (Bit Rate Reduction) and Its Impact on Psychoacoustic Watermarks by Paul Shulins
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