Index Last Updated: Thu Dec 12 23:35:08 2002

Parent Directory at Master Site: http://www.gno.org/pub/apple2/doc/genie/a2pro
Current Directory at Master Site: http://www.gno.org/pub/apple2/doc/genie/a2pro/hcomp
Current Directory: /pub/apple2/doc/genie/a2pro/hcomp

Most files are available by three methods. The file name link downloads files from the server you are currently on using the HTTP protocol. The HTTP and FTP links following the file name will retrieve the file from the master Trenco archive using the HTTP or FTP protocols, respectively.

hcomp01.shk (47 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 1: Introduction. Course overview and introduction to compression concepts.

hcomp02.shk (56 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 2: Basics. Discussion of RLE and differential coding.

hcomp03.shk (75 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 3: Somewhat Clever Ad-Hoc Schemes. Simple character encodings, MTF, digrams; intro to higher-order models.

hcomp04.shk (65 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 4: Shannon, Fano, and Huffman. Explanation of probability encoding.

hcomp05.shk (97 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 5: Adaptive Encoding. Adaptive vs static methods, Splay trees, adaptive Huffman.

hcomp06.shk (102 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 6: Arithmetic Coding. How arithmetic encoding works; includes the CACM sources and variations.

hcomp07.shk (10 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 7: Ziv and Lempel. Discussion of LZ77 and LZ78.

hcomp08.shk (44 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 8: LZW. Detailed explanation of the LZW algorithm.

hcomp09.shk (24 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 9: NuFX and ShrinkIt. Discussion about the compression used in ShrinkIt.

hcomp10.shk (49 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 10: LZSS. Detailed explanation of the LZSS algorithm.

hcomp11.shk (96 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 11: LZH, LZARI, and LZB. How to improve LZSS with Huffman, arithmetic, and unary coding.

hcomp12.shk (11 k) Retrieve from Trenco by HTTP or by FTP.

Lesson 12: HardPressed(tm). How to write compression modules for HardPressed.

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