Sony 3-270-589-12 (1), PDW-F75 Using UMID Data, What is a UMID

Using UMID Data

Metadata is additional information recorded on discs 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.

What is a UMID?

A UMID (Unique Material Identifier) is a unique identifier for audio-visual material defined by the SMPTE 330M- 2003 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.

Extended UMID (64 bytes)

Basic UMID (32 bytes) Source Pack (32 bytes)

Universal label	L	Instance	Material Number	Time/Date	Spatial	Country	Org	User
		No.			Coordinates
12 bytes	1	3 bytes	16 bytes	8 bytes	12 bytes	4 bytes	4 bytes	4 bytes

Appendix

A globally unique ID is automatically recorded for every			The Extended UMID is metadata that provides additional
clip.			information such as location, time/date, company ID and
			so on.
			The UMID is applied as follows.
		Material No.		Source Pack
	Instance No.	ID generated when		Shooting
		shooting		information (when,
		Same as the above		where and who)
				Same as the above
Original material: 00 00 00
Copied material: generation number (1 byte)
+ random number (2 bytes)
Distinguish between the		Material source ID/		Metadata pack that
original material and copied		detecting material		identifies the source of
material				material unit by defining the
				when, where and who of
				the material unit with which
				it is associated.

Using the Extended UMID

You have to enter a country code, organization code and user code. Set the country code referring to the table in ISO 3166, and set the organization code and user code according to the guidelines of your organization.

For details, see “Setting UMID ownership information” (page 129).

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.

128 Using UMID Data