Resources Contact Us Home
System for compressed storage of 8-bit ASCII bytes using coded strings of 4 bit nibbles

Image Number 4 for United States Patent #4597057.

Standard ASCII coded text is divided into alpha, numeric, and punctuation tokens. Each token is converted to a string of four-bit nibbles. One nibble is coded to identify the type of token. Additional nibbles are coded to identify the location, if any, of a corresponding alpha or punctuation token in a global dictionary. If no corresponding alpha token is in the dictionary, an alpha token is divided into prefixed, suffixes, and a stem. The location of any prefixes in a table of prefixes, suffixes in a table of suffixes, and the number, and location of corresponding individual characters in a table, of the remaining stem are then coded and stored as part of the string of four-bit nibbles for the alpha tokens. Numeric tokens are stored as a string of four-bit nibbles in which the first nibble identifies the type of token, the next nibble the length, followed by a nibble for each of the digits.

  Recently Added Patents
Method and apparatus for communication
Method and devices for handling access privileges
In-vehicle electronic control apparatus having monitoring control circuit
Processor and data transfer method
Apparatus and method for image encoding/decoding using predictability of intra-prediction mode
Substrate and patterning device for use in metrology, metrology method and device manufacturing method
  Randomly Featured Patents
Polymer electrolyte with high stability, its use in electrochemical systems
Unified parental locks
Digital watermark embedding apparatus and method, and digital watermark analysis apparatus, method and program
Split-blade data collection for propeller MRI
Portable, self-contained, educational-organizational system and method employing such system
System and method for producing pulsed monochromatic X-rays
Reclosable folding box with tamper-evident closure without adhesive
Wind and water turbine
Honeycomb body with a cross-sectional region which is bordered in the interior, in particular for small engines