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  • Bijective BWT (7 Comments)

    David Scott has written a bijective BWT transform, which brings all the advantages of bijectiveness to BWT based compressors. Among other things, making BWT more suitable for compression-before-encryption and also give (slightly) better compression.

  • Asymmetric Binary System (116 Comments)

    Jarek Duda’s “Asymmetric Binary System” promises to be an alternate to arithmetic coding, having all the advantages, but being much simpler. Matt has coded a PAQ based compressor using ABS for back-end encoding. Update: Andrew Polar has written an alternate implementation of ABS.

  • Precomp: More Compression for your Compressed Files (3 Comments)

    So many of today’s files are already compressed (using old, outdated algorithms) that newer algorithms don’t even get a chance to touch them. Christian Schneider’s Precomp comes to rescue by undoing the harm.

  • On2 Technologies is Hiring

    There aren’t too many companies working on cutting edge codecs, and of those few this one is hiring. Best of luck.

  • China’s AVS Specifications Available (2 Comments)

    Its old news that China has developed their own Advanced Video Standard to avoid high licensing fees. English translation of the standard is now available, along with the IPR policy. Finally something technical that you can get your hands on to feed your appetite.

OGC(R) Approves GML in JPEG 2000 Specification

Posted by Sachin Garg on 19th February 2006 | Permanent Link

The Open Geospatial Consortium Inc. (OGC) membership has approved the OpenGIS(R) GML in JPEG 2000 for Geographic Imagery (GMLJP2) Implementation Specification. It is available for downloading from http://www.opengeospatial.org/specs/?page=specs.

The Geography Markup Language (GML) is an XML grammar for the encoding of geographic information. JPEG 2000 is a wavelet based image compression standard that provides the ability to include XML data for description of the image within the JPEG 2000 data file. This OpenGIS Implementation specification defines the means by which the OGC Geography Markup Language (GML) is to be used within JPEG 2000 images for geographic imagery. Further, the specification also provides packaging mechanisms for including GML within JPEG 2000 data files as well as specific GML application schemas to support the encoding of images within JPEG 2000 data files.

The following organizations submitted the specification to the OGC for consideration as a standard: Galdos Systems Inc.; LizardTech; European Union Satellite Centre (EUSC); DM Solutions Group Inc (DMSG); and the US Geological Survey (USGS) National Mapping Division. The submitting organizations were grateful for contributions from the following companies in the development and revision of this specification: BAE SYSTEMS - Information Systems Sector; Boeing S&IS Mission Systems; Intergraph Corporation; ITT Industries Space Systems Division; PCI Geomatics Inc.; SPOT Image (SPOT); and the US National Aeronautics and Space Administration (NASA). Public comments on the draft specification were solicited, received and reviewed before the specification was finalized and voted upon.

OGC is an international industry consortium of more than 300 companies, government agencies and universities participating in a consensus process to develop publicly available interface specifications. OpenGIS(R) Specifications support interoperable solutions that “geo-enable” the Web, wireless and location-based services, and mainstream IT. The specifications empower technology developers to make complex spatial information and services accessible and useful with all kinds of applications. Visit OGC’s website at http://www.opengeospatial.org.

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This entry was posted on Sunday, February 19th, 2006 at 12:18 pm by Sachin Garg. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.