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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 byte)

 

 

 

 

 

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.

Appendix

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 90).

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.

Using UMID Data 89