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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    So many of today’s files are already compressed (using old, outdated algorithms) that newer algorithms don’t even get a chance to touch them.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 Invites Public Comment on GML in JPEG 2000 Specification

Posted by Sachin Garg on 28th June 2005 | Permanent Link

In a press release, The Open Geospatial Consortium Inc. (OGC) invites public comment on a candidate specification that will soon be presented for approval by OGC members as an OpenGIS(R) Implementation Specification. The OGC Document, “GML in JPEG 2000 for Geographic Imagery (GMLJP2) Implementation Specification,” is available for downloading from https://portal.opengeospatial.org/files/?artifact_id=11418. Comments can be submitted to gmljp2-rfc@opengeospatial.org for a thirty-day period ending July 27; Comments received will be consolidated and reviewed by OGC members for incorporation into the document.

The Geography Markup Language (GML) is an XML grammar for the encoding of geographic information including geographic features, coverages, observations, topology, geometry, coordinate reference systems, units of measure, time, and value objects. JPEG 2000 is a wavelet based encoding for imagery that provides the ability to include XML data for description of the image within the JPEG 2000 data file. The “GML in JPEG 2000 for Geographic Imagery (GMLJP2) Implementation Specification” defines the OGC standard method of using GML within JPEG 2000 images for geographic imagery.

OGC is an international industry consortium of more than 280 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 the OGC website at http://www.opengeospatial.org.

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This entry was posted on Tuesday, June 28th, 2005 at 11:13 am 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.