Techniques for High Tonal Quality Picture Transmission. Volume 1.

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Abstract:

This is a study of techniques for high tonal quality picture transmission. The usefulness of a picture as a function of resolution and the gamma of the photographic paper has been investigated from a photo-interpreters view. While gamma was found to have no effect if extreme values were excluded, the usefulness fell as the inverse square root of the resolution in the region of most interest. Methods of transmitting the picture by digital means have been explored. For economy of transmission time and minimal effect of errors in the bit stream, two variants of normal delta modulation were found to be equal in performance and superior to all the other methods of digital modulation investigated. A survey has been made of methods of scanning photographs and of reproducing them at the receiver.

Author(s):
Cooper, Edward B. ; Jenks, Geoffrey J. ; Lattimore, Samuel ; Raymond, Oliver J. ; Tooley, Ross C.
Author Organization(s):
PLESSEY PACIFIC PTY LTD RICHMOND (AUSTRALIA)
Descriptive Note:
Final rept. Sep 67-Oct 68,
Supplementary Note:
Report on Project MALLARD. See also Volume 2, AD-857 407L.
Pagination:
0240

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
MALLARD-TSE-32/33-Vol-1
Project Number(s):
WBS-HA010432-03
 Subject Terms
Joint Capability Areas:
JCA_6.1_Information Transport; JCA_6_Net Centric
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*COMMUNICATION AND RADIO SYSTEMS, *MICROWAVE COMMUNICATIONS, *FACSIMILE COMMUNICATIONS, *DATA TRANSMISSION SYSTEMS, TACTICAL WARFARE, DIGITAL SYSTEMS, PHOTOGRAPHIC CONTRAST, PICTURES, DELTA MODULATION, PULSE CODE MODULATION, DEMODULATION, PHOTOINTERPRETABILITY, RESOLUTION, SCANNING, DATA PROCESSING, ERRORS, CORRECTIONS, QUALITY CONTROL, AUSTRALIA
Field(s)/Group(s):
Military Operations, Strategy and Tactics, Electricity and Magnetism, Non-Radio Communications
Keyword(s):
CONTRAST, *MALLARD PROJECT
Report Date:
1968 Oct 01