Accession Number:

ADA080172

Title:

Performance of a Source/Channel Encoded Imagery Transmission System.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1979-12-01

Pagination or Media Count:

159.0

Abstract:

The performance of an image transmission system which combines an image source encoding technique with communication channel codes is theoretically calculated and measured by simulation. The theoretical and simulated results show that replacing source data bits with error correction coding bits can reduce the distortion in the received image. The magnitude of the reduction depends on the transmission rate, the code rate NK of the channel code, the procedures used to apply the channel code and the error rate of the communication channel. The image source encoding technique used is the two dimensional Discrete Cosine Transform. This technique is combined with both block and convolutional channel codes to form the sourcechannel encoded imagery transmission system. The distortion in the received image is measured using a weighted mean square error criterion in which the weighting is related to the frequency sensitivity characteristics of the human visual system. Author

Subject Categories:

  • Cybernetics
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE