Transform Coding and Differential Pulse Code Modulation for Group 4 Facsimile

Abstract

This document compares Transform Coding with Differential Pulse Code Modulation (DPCM) in order to determine the relative effectiveness of each technique as applied to the compression of gray scale images for Group 4 facsimile permits the transmission of black-white imagery only. Consequently, any input page containing gray scale information, such as a photograph, will be severely distorted by basic Group 4 machines. However, there are plans by the CCITT to add a Gray Scale option to the Group 4 facsimile standard for transmitting pictorial data. Keywords: Differential pulse code modulation (DPCM) , Group 4, Gray scale, Facsimile, Transform coding.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1987
Accession Number
ADA223954

Entities

Organizations

  • Delta Information Systems (United States)

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Communication Systems
  • Compression
  • Computer Programming
  • Computer Simulations
  • Data Compression
  • Differential Pulse Code Modulation
  • Gray Scale
  • Image Processing
  • Images
  • Information Systems
  • Modulation
  • Pulse Code Modulation
  • Real Numbers
  • Simulations
  • Standards
  • Statistics

Readers

  • Computer Programming and Software Development.
  • Computer Vision.
  • Image Processing and Computer Vision.