Image Transmission Via Spread Spectrum Techniques

Abstract

The report describes the progress on second phase of a program on image bandwidth reduction for application to the ARPA remotely piloted vehicle (RPV) problem of sending television images over spread spectrum channels. The report details the first quarter of a hardware development and implementation phase. Hardware was constructed to perform linear transformations on the television signal. Both surface acoustic wave and charge transfer devices were built and tested. It was decided to proceed with charge transfer devices for the final design. The study of performance tradeoff as a function of block size and transform was continued. It was determined that a Cosine transform together with a differential pulse code modulation (DPCM) transform in the second dimension offers near optimal performance. A principal result of this quarter is the determination that the DPCM and Cosine mixed transform are an optimal performance system. A second result is that charge transfer device hardware has been built which approximates the final prototy#e hardware.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1973
Accession Number
AD0775234

Entities

People

  • Harper J. Whitehouse
  • Jeffrey M. Speiser
  • Robert W. Means

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Waves
  • Charge Coupled Devices
  • Coding
  • Communication Systems
  • Computers
  • Digital Computers
  • Discrete Fourier Transforms
  • Electrical Engineering
  • Filters
  • Generators
  • Image Processing
  • Remotely Piloted Vehicles
  • Signal Processing
  • Surface Acoustic Wave Devices
  • Surface Acoustic Waves
  • Surface Waves
  • Two Dimensional

Fields of Study

  • Engineering

Readers

  • Image Processing and Computer Vision.
  • Radio communications and signal processing.
  • Software Engineering