EXPERIMENTS WITH A NEW MESSAGE FORMAT FOR DIGITAL ENCODING OF PICTORIAL INFORMATION.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1969
- Accession Number
- AD0685819
Entities
People
- Bernard Lippei
Organizations
- United States Army Communications-Electronics Command