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Proceedings Paper

Comparison Of Video Fields And Frames For Transform Compression
Author(s): Harry w. Jones; Larry B. Hofman
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Paper Abstract

Because of the interlaced television scan, the two fields that form an interlaced video frame are generated 1/60 of a second apart. If the two fields are compressed independently, the correlation between adjacent lines is unused. The transmission rate can be reduced by using a field memory to form an interlaced frame. Four test images were processed as fields and as interlaced frames, using both theoretical and experimental compression designs. For comparable mean-square error and subjective appearance, field compression requires about one-half bit per sample more than frame compression. However, the overall transmission rate -- the number of bits per image times the number of images per second -- is more meaningful than the number of bits per sample. When transform compression at low transmission rates merges the adjacent lines, frame compression becomes similar to field repeating, and the memory can be reduced.

Paper Details

Date Published: 7 December 1978
PDF: 8 pages
Proc. SPIE 0149, Digital Image Processing II, (7 December 1978); doi: 10.1117/12.956688
Show Author Affiliations
Harry w. Jones, COM-CODE, Inc. (United States)
Larry B. Hofman, Ames Research Center, NASA (United States)

Published in SPIE Proceedings Vol. 0149:
Digital Image Processing II
Andrew G. Tescher, Editor(s)

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