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Under ideal conditions, the FD CID SID identifies the SID of the last NAES 2 FD
watermark listed among the EDUs of the current ID3 tag. In the absence of NAES 2
watermarks, special rules apply to the selection of the SID based on NAES 6
watermarks. The PCM-to-ID3 SDK requires 10 seconds or more to "latch onto" the proper
FD SID. As a result, the FD CID may be inaccurate (or set to 0) for 10 to 20 seconds after
a SID changes or disappears.
Under ideal conditions, the FD CID timestamp is a raw NAES 2 timestamp that translates
to the start of the current broadcast day (3 a.m. in the time zone where the NAES
encoder was operating). If the FD CID SID is set to 0 or is inaccurate, crediting ignores
the FD CID timestamp.
All CID timestamps are derived from the watermarks to which the PC CID SID
corresponds. They are not derived from the "current time" that your application supplies
to the PCM-to-ID3 SDK.
Seconds since FD Day-Start (FD CID Offset)
The FD CID offset specifies the number of seconds that separate the FD CID timestamp
and the timestamp of the most recent EDU that bears the FD CID SID. Note that all
timestamps are translated to NAES 2 format before any calculations are made. The
following lines show an ideal example:
Seconds since PC Day-Start (PC CID Offset)
The PC CID offset specifies the number of seconds that separate the PC CID timestamp
and the timestamp of the most recent EDU that bears the PC CID SID. Note that all
timestamps are translated to NAES 2 format before any calculations are made. The
following lines show an ideal example:
Break-out Flag
Always set the breakout code to 0 in your application.
Release 1.8 Revision F
(<FD CID timestamp> + <FD CID Offset> - 15) <= FD EDU timestamp <=
(<FD CID timestamp> + <FD CID Offset> + 15)
(<PC CID timestamp> + <PC CID Offset> - 15) <= PC EDU timestamp <=
(<PC CID timestamp> + <PC CID Offset> + 15)
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ID3 Tag Validator Application User Manual
Nielsen Confidential
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