Nielsen Watermarking

Nielsen measures television usage through the use of discreet digital audio watermarks (or codes) embedded within content by the programming community (networks, cable networks, syndicators and stations) for purposes of content identification. Nielsen also utilizes a vast reference array of signature matching technology as an additional content identification mechanism; one that is an equally vital and important approach. The audio watermark payload identifies the source or origin of the distribution feed via a SID (source identifier) assigned to the distribution outlet, date, and time stamp payload structure that is repeated at 2 second intervals. Application of watermarks in a broadcast center is achieved through use of rack mounted hardware encoders. The encoders by design are intended to be positioned on each broadcast feed along with backups positioned as near to the satellite uplink or transmitter as possible. A typical broadcast network may employ 12-15 encoders to support all live feeds as well as backup or emergency feeds. The task of the encoder is to simply and continuously apply watermarks to all content passing though the encoder on a 24×7 basis.

Published

2011-10

Content type

Original Research

DOI

10.5594/M001091

ISBN

978-1-61482-940-9