Using Umid Data - Sony XDS-1000 Operation Manual

Using UMID Data

Metadata is additional information recorded on media
along with audio-visual data. It is used to bring greater
efficiency to the flow of operations from material
acquisition through editing, and to make it easier to find
and reuse material.
As one of application of metadata, the UMID has been
internationally standardized.
Universal label
12 bytes
A globally unique ID is automatically recorded for every
clip.
Original material: 00 00 00
Copied material: generation number (1 byte)
Functions of UMID data
UMID data enables the following:
• Addition of a globally unique ID to every clip of audio-
visual material. The unique ID is used to detect the
material source and to link it with the original source
material.
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Using UMID Data
Extended UMID (64 bytes)
Basic UMID (32 bytes)
Instance
L Material Number
No.
1 16 bytes
3 bytes
Material No.
ID generated when
Instance No. shooting
Same as the above
+ random number (2 bytes)
Distinguish between the
Material source ID/
original material and copied
detecting material
material
What is a UMID?
A UMID (Unique Material Identifier) is a unique identifier
for audio-visual material defined by the
SMPTE-330M-2004 standard.
A UMID may be either as a 32-byte Basic UMID or an
Extended UMID, which includes an additional 32 bytes of
Source Pack to make a total 64 bytes.
For details, refer to SMPTE-330M.
Source Pack (32 bytes)
Spatial
Time/Date
Country
Coordinates
4 bytes 4 bytes 4 bytes
8 bytes 12 bytes
The Extended UMID is metadata that provides additional
information such as location, time/date, company ID and
so on.
The UMID is applied as follows.
Source Pack
Shooting
information (when,
where and who)
Same as the above
Metadata pack that
identifies the source of
material unit by defining the
when, where and who of
the material unit with which
it is associated.
• Distinguishing between original material and copied
material. 00 is added to the Instance Number for original
material.
• Recording with UTC time. UTC (coordinated universal
time) is used when recording the UMID. Use of a
universal time system enables uniform management of
source material recorded all over the world.
• Calculation of date differences. Source material is
recorded using modified Julian dates (MJD), which
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