(last updated 2009-03-13)

Name : Steve Hattersley

Email : steve.hattersley&dolby.com

MIME media type name : Audio

MIME subtype name : Vendor Tree - vnd.dolby.pl2

Required parameters : None

Optional parameters :
channels
Provides detail of the number of channels implemented within the encoded
content, or within a decoder if used as an indicator of supported content.

Value=Meaning (Available Channels)
1 = Mono audio
2 = Left and Right
2.1 = Left, Right and Low Frequency (Sub-woofer)
3 = Left, Centre and Right channels
or Left, Rear (mono-surround) and Right
3.1 = Left, Centre, Right and Low Frequency
4 = Left, Right, Left Surround and Right Surround
or Left Front, Right front, Left rear and Right rear
4c = Left, Centre, Right and Mono Rear
4.1 = Left, Right, Left Surround, Right Surround and Low Frequency
or Left Front, Right front, Left rear, Right rear and Low Frequency
4.1c = Left, Centre, Right, Mono Rear and Low Frequency
5 = Left, Centre, Right, Left surround and Right surround
5.1 = Left, Centre, Right, Left surround, Right surround and Low frequency
7 = Left, Centre, Right, Hard-Left, Hard-Right, Left surround and Right surround
7.1 = Left, Centre, Right, Hard-Left, Hard-Right, Left surround, Right surround
and low frequency



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

Security considerations :
This media type consists of encoded audio and playback information and contains
no executable content, commands or control sequences. It provides no privacy or
integrity services. Other security considerations, if any, have not been assessed.

Interoperability considerations :
Playback of this encoded content requires a specification-compliant decoder.

Published specification :
Dolby Pro-Logic is a proprietary format. This media type is intended for use by
those licensing Dolby Pro-Logic II technologies.

Applications which use this media :
Various and multiple content encoding and decoding/playback technologies

Additional information :

1. Magic number(s) : n/a
2. File extension(s) : n/a
3. Macintosh file type code : n/a
4. Object Identifiers: n/a

None

Person to contact for further information :

1. Name : Steve Hattersley
2. Email : steve.hattersley&dolby.com

Intended usage : Common
This media type is intended for use by those licensing and implementing Dolby
Pro-Logic II technologies on mobile devices; specifically to provide mobile
handset manufacturers with a media type that may be used in User Agent Profiles
(UAProfs) in the mobile eco-system without being mis-interpreted. In User Agent
Profiles, this media type identifies clients and/or devices that are able to
process content encoded to the proprietary Dolby Pro-Logic II standard.

Author/Change controller : Steve Hattersley
Steve.Hattersley&dolby.com


(file creted 2009-03-13)