Accession Number : AD0685819

Title :   EXPERIMENTS WITH A NEW MESSAGE FORMAT FOR DIGITAL ENCODING OF PICTORIAL INFORMATION.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Lippei,Bernard

Report Date : JAN 1969

Pagination or Media Count : 56

Abstract : Ordinarily a black-and-white photograph is digitally encoded in the PCM format; the picture is dissected into L2 samples and the brightness of each sample is represented by a binary number of k bits. With the aid of a digital computer and special picture/magnetic-tape interconversion equipment, experiments were performed to evaluate a radically different structure for the picture message. Pictures decoded from the experimental format (in four different versions) were compared with pictures reconstructed from PCM-format messages having the same or larger number of bits. They seem to indicate that a well-chosen embodiment of the experimental format offers better quality than PCM under the constraints of fixed message length and fixed number of brightness levels. Photographic copies of compared pictures are included in the report. (Author)

Descriptors :   (*PHOTOGRAPHS, DIGITAL RECORDING SYSTEMS), (*DIGITAL RECORDING SYSTEMS, CODING), DATA TRANSMISSION SYSTEMS, DIGITAL COMPUTERS, COMPUTER PROGRAMS, PHOTOGRAPHIC IMAGES

Subject Categories : Computer Programming and Software
      Computer Hardware
      Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE