ID3 Tag Validator Application User Manual
Release 1.8 Revision F
54
Nielsen Confidential
FD CID SID mismatch; FD CID TS inconsistency
21 1444645071 183 9020
2800909039
9020
2800851248
57791 26516 1582259560
9120
2800851248
57790 194
The FD CID Timestamp is the decrypted timestamp component of the 24-byte PC
Content ID.
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, the FD
CID timestamp should be ignored.
All CID timestamps are derived from the watermarks to which the FD CID SID
corresponds. They are not derived from the “current time” that your application
supplies to the PCM-to-ID3 SDK.
The snippet above shows the tag with sequence number 21, which has a badly
decoded FD timestamp. As a result, the “Comments” field in this row reports “FD CID
TS inconsistency.” Ignore this error because the CID is correct, and only the decoded
watermark is in error.
•
FD CID Offset
18
1444645043
155
9020
2800909011
9020
2800851248
57763
9120
2800909007
9120
2800851248
57759
168
The FD CID offset specifies the number of seconds that separate the FD CID
timestamp and a representative Watermark FD Timestamp for the current tag. Note
that all timestamps are translated to NAES 2 format before any calculations are
made. Ideally:
(<FD CID timestamp> + <FD CID Offset> - 10) <= Watermark FD
Timestamp <=
(<FD CID timestamp> + <FD CID Offset> + 10)
In the example comma-delimited file snippet, note that, for sequence number 18:
o
FD CID TS =
2800851248
o
FD CID Offset =
57759
Therefore,
o
FD CID TS + offset = 2800909007 (calculated)
o
Watermark FD timestamp =
2800909007
The watermark FD timestamp exactly matches the FD CID TS + offset, so the values
are correct.
