Huffman Codes

Kunzip is a free (but not opensource) library for decompressing ZIP archives. Kunzip started out as a test program I wrote for decompressing .zip files through a command line program. I eventually added hooks to make it a DLL that can be used from Windows programs. It is also possible to... Platforms: *nix

The SPIHT method is not a simple extension of traditional methods for image compression, and represents an important advance in the field. The method deserves special attention because it provides the following: Highest Image Quality Progressive image transmission Fully embedded coded file Simple... Platforms: Matlab

Algorithm::Huffman is a Perl extension that implements the Huffman algorithm. SYNOPSIS use Algorithm::Huffman; my %char_counting = map {$_ => int rand(100)} (a .. z, A .. Z); # or better the real counting for your characters # as the huffman algorithm doesnt work good with random data... Platforms: *nix

Hash Codes is a simple and easy to use application designed to enable users to hash data from keyboard, file or CD/DVD. This tool supports: Adler32, CRC32, CRC64, MD2, MD4, MD5, MD6, SHA-0, SHA-1, SHA-1-IME, SHA-224, SHA-256, SHA-384, SHA-512, RIPEMD-128, RIPEMD-160, RIPEMD-256, RIPEMD-320 or... Platforms: Windows, Windows Vista, 7

WorldUnlock Codes Calculator is a free utility for Nokia, Siemens, Vitel, Maxel, Panasonic, LG, AEG,Samsung, and Motorola unlock. Includes MasterCode calculator that can reset your Nokia security code if you have lost it. Features: · Unlock Nokia · Unlock LG · Unlock Panasonic ·... Platforms: Windows

Static Huffman Coding and Decoding, and Adaptive Huffman Coding and Decoding for text compression Platforms: Matlab

This file contains MATLAB functions, m-files, that do Huffman coding and arithmetic coding of integer (symbol) sequences. Complete coding may be done by calling an easy to use main program (or main function), where input argument is the sequences you want to compress and the output is the... Platforms: Matlab

Recently, we find some published programs for the construction of LDPC codes have not concerned the Girth test problem, which will not the implementation of LDPC Codec to have good decoding BER. Thus, we publish a simple program to provide a tool for the girth 4 test of LDPC codes.Input a parity... Platforms: Matlab

The program constructs girth-six QC-LDPC codes given row-weight,k, column-weight,j, and sub-matrix size,m. The obtained parity-check matrix is stored in H. The construction has flexibility in that j,k and m can be varied.The program achieves girth-six by applying the row-column constraint. There... Platforms: Matlab

The program constructs girth-twelve column-weight QC-LPDC codes. The rate can be changed by changing k(row-weight), size is changed by varying m(sub-matrix size). The program/algorithm does not guarantee to get girth twelve code. It guarantees girth of eight. One may need to run the programs many... Platforms: Matlab

The program contructs column-weight three girth-eight QC-LPDC codes given row-weight and sub-matrix size. row-weights and sub-matrices sizes are variable. Platforms: Matlab

it encodes and decodes binary msg using hamming codes and detect errors, correct single error. Platforms: Matlab

The set of MATLAB codes are what I wrote for my Data Communications homework. They show a typical implementation of a (7,4) Hamming code. 'Read the how to run.txt' for instructions on how to use the codes Platforms: Matlab

LDPC codes BER simulation under AWGN channel. MacKay-Neal based LDPC matrix. Message encoding uses sparse LU decomposition. There are 4 choices of decoder: hard-decision/bit-flip decoder, probability-domain SPA decoder, log-domain SPA decoder, and simplified log-domain SPA decoder. Platforms: Matlab

This module helps create secret codes that users can enter to automatically register or upgrade their accounts to specific roles. It is particularly useful for cases when it's impractical for the website administrator to manually process and upgrade single subscriptions, but still important to... Platforms: PHP

BIOS Beep codes is a simple tool that will explain the BIOS error beep codes you motherboard emits. It has an extensive database with the motherboard BIOS beep codes from all major BIOS manufacturers (AMI, AWARD, Phoenix, IBM). The computer POST (Power On Self Test) tests the computer,... Platforms: Windows

Full Key Codes is a little utility to display code informations about each key of the keyboard. The developers know why :-) In a little window, you will obtain for each key down its character, its ASCII code, and the keyboard code in hexadecimal and decimal. Platforms: Mac

Country Codes is a small database of country codes and additional information for more than 250 countries. It displays their location (continent), ISO 3166-1 Alpha 2-3 codes and ISO number as well as IDDD code and flag, NDD Code, Country Dialing Code, FIPS PUB 10-4 and TLD (Top Level Domain) code... Platforms: Windows

Acupuncture Insurance Codes is an insurance code browser specifically designed for the use of Acupuncture practitioners. Easy filtering and sorting options coupled with the ability to add/edit codes enable the easiest way to handle ICD9 and CPT codes. Platforms: Windows

Hash Codes is a simple and easy to use application designed to enable users to hash data from keyboard, file or CD/DVD. This tool supports: Adler32, CRC32, CRC64, MD2, MD4, MD5, MD6, SHA-0, SHA-1, SHA-1-IME, SHA-224, SHA-256, SHA-384, SHA-512, RIPEMD-128, RIPEMD-160, RIPEMD-256, RIPEMD-320 or... Platforms: Windows