Request for review of DMB Application format media types: video/dmb [updated]

Houari houari_id at
Fri Dec 14 03:42:25 CET 2007

Dear all

The following is the updated request. The other updated requests is in
 another e-mail.

Regarding the different types of application for the same extensions, there exist a field in ISO/IEC 23000-9 file for identifying video/dmb resources.
It is called 'major_brand' in the specification.
Actually, 15 brands are defined in the specification; 8 audio brands (which correspond to 'audio/dmb'), 6 video brands (which correspond to 'video/dmb'), and 1 all-in-one brand (which correspond to 'application/dmb').
Different brands for a MIME type exist basically for regional or operators’ different choice for audio codec.

The registered Macintosh file type is "dmb " ("d", "m" and "b" followed
 by space)

MIME media type name : video

MIME subtype name : dmb

Required parameters :     none

Optional parameters : 

Encoding considerations : binary
This media type may require encoding on transports not capable of
 handling binary.

Security considerations : 
    It is not possible to inject supported components other than those
 are specified in the DMB AF specification (ISO/IEC 23000-9) in the dmb
 file. This might prevent to crash the receiver or temporarily make it
    The authentication mechanism can be used to validate of the sender
 and the data to prevent security problems due to non-compliant
 malignant dmb file. 

Interoperability considerations : 
    A number of interoperating implementations exist within the ISO/IEC
 23000 community, and that community has reference software for reading
 and writing the file format.

Published specification : 
    Not published yet. However, ISO/IEC 23000-9 is currently at FDIS
 stage and expected to be published in Jan. 2008.

Applications which use this media : 
    Multimedia applications

Additional information :

1. Magic number(s) : none
2. File extension(s) : dmb
3. Macintosh file type code : dmb 
Person & email address to contact for further

information: Hui Yong Kim <hykim5 at
<mailto:hykim5 at>>

Intended usage : COMMON 

Author: Hui Yong Kim, editor of ISO/IEC 23000-9 Digital Multimedia
 Broadcasting Application Format
Change controller: ISO/IEC JTC 1/SC 29/WG 11 (MPEG)

- Houari

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