DYNAMIC-RANGE REDUCTION OF VIDEO SIGNALS BY AMPLITUDE COMPRESSION

Abstract

Methods of recording a video signal with large dynamic range on a magnetic tape (or other recording medium) that has a smaller dynamic range than that of the signal are discussed. The useful part of the voltage range of the input signal is mapped onto the linear voltage range of the recorder. Several maps are considered with the thought of minimizing the degradation of the final signal by recorder noise. Two mapping functions are found to be useful: a logarithmic function, and a part-linear, partlogarithmic one. The use of these maps entails a reduction in signal-to-noise ratio for large input signals. The relationships among the input signal dynamic range, the recorder dynamic range, and the attainable output signalto-noise ratios are calculated. Results are presented graphically for several particular cases.

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Document Details

Document Type
Technical Report
Publication Date
Nov 16, 1964
Accession Number
AD0609361

Entities

People

  • R. D. Behn

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Classification
  • Compression
  • Computer Programs
  • Contracts
  • Degradation
  • Department Of Defense
  • Distribution Functions
  • Dynamic Range
  • Instructions
  • Probability
  • Probability Distributions
  • Recording Systems
  • Security
  • Statistical Analysis
  • Video
  • Video Signals

Fields of Study

  • Engineering
  • Physics

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Radar Systems Engineering.