The Calgary Corpus Compression Challenge Update
Posted by Sachin Garg on 5th August 2006 | Permanent Link
Alexander Ratushnyak updates his December 2005 entry (of size 593620) to Calgary corpus compression challenge. The new record is 589862 bytes.
Matt Mahoney provides a summary of the PAQAR based compressor in a comp.compression post:
I looked at the decompressor. It is based on PAQAR with a tiny dictionary like the previous submission last December. But it appears there are two main differences. First, it uses bitwise contexts to model pic (in PicModel), as in PAQ7. Second, it adds an indirect context model (included in SparssModel), as in PAQ8F.
In other news, on May 21, 2006, Calgary corpus compression completed ten years since its inception.