Resources Contact Us Home
Data compression method and apparatus

Image Number 4 for United States Patent #7864085.

Embodiments of the invention include a dictionary based data compression method, apparatus and system that is not based on either the LZ77 compression algorithm or the LZ78 compression algorithm, but includes many features of the LZW compression algorithm. The data compression method includes creating a mapping table of the messages in the alphabet of messages to a corresponding plurality of codewords, maintaining a dictionary including a mapping table of a first codeword and a second codeword to a new codeword, reading an input ensemble including a plurality of messages, converting the messages to an input codeword using the mapping table, and outputting the converted codewords as an output ensemble of compressed data. Unlike conventional data compression methods, the dictionary is generated from the output ensemble only, and is not based on any input messages. Therefore, the dictionary more quickly builds to define longer sequences of messages compared to conventional data compression methods.

  Recently Added Patents
Isothermal amplification of DNA
Apparatus and method for an iterative cryptographic block
Family of pain producing substances and methods to produce novel analgesic drugs
Self-service administration of a database
Method for encoding signal, and method for decoding signal
Hard disk drives having different rotational speeds
Probiotic enriched and low organic acid food products
  Randomly Featured Patents
Drilling machine
Tail fin deployment device
Self-dispensing spring biased thin film container
Power-on reset circuit and method for low-voltage chips
Method and system for displaying lighting fixtures
Process for preparing glucose isomerase using streptomyces glaucescens mutants
Concrete form snap tie
Air pump for a natural mineral water bottle
Electroplating method