Accession Number:

AD0775234

Title:

Image Transmission Via Spread Spectrum Techniques

Descriptive Note:

Quarterly technical rept. 1 Jun-1 Oct 1973

Corporate Author:

NAVAL UNDERSEA CENTER SAN DIEGO CA

Report Date:

1973-10-01

Pagination or Media Count:

136.0

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 prototye hardware.

Subject Categories:

  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE