[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

About XML Compression and MPEG-7

  • From: Claude Seyrat <cseyrat@a...>
  • To: xml-dev@l...
  • Date: Fri, 16 Feb 2001 12:33:53 +0100

mpeg 7 compression

Dear All,

Regarding the compression aspect of XML, i would like to 
mention that currently MPEG experts are working on a standard 
(MPEG-7) about audiovisual metadata carriage and processing.

In MPEG-7 metadata are expressed in XML. XML Schema is used to 
define datastructures. A large library of types are defined to 
describe many aspect of a multimedia document ranging from low 
level features (colors, movement, etc..) to high level description 
(RDF like).

XML descriptions can be sent as a whole or synchronously streamed
within the AV stream (MPEG-2 or MPEG-4). In MPEG-7, XML can be 
easily encoded, streamed, and filtered.

For that purpose MPEG-7 designed a binary encoding format very 
similar to what you are suggesting and to ASN-1 (but far more 
XML oriented). The codec is dynamically generated based on the 
schema expressed in XML Schema. It accepts every XML Schema 
features like substitutionGroups, sub-typing, choices, sequences, 

Compression ratios show that elements can be represented by few bits
in average (sometimes less than one bit), values are coded using 
specific datatype encodings. 

Best regards,


Claude Seyrat

Expway c/o Acland
18 avenue Georges V
75008 Paris
tel: 33 1 56 62 11 05
fax: 33 1 56 62 11 11
mail: cseyrat@a...


Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
First Name
Last Name
Subscribe in XML format
RSS 2.0
Atom 0.3

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.

Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.