Comparison Of Video Fields And Frames For Transform Compression

Harry w. Jones Jr.; Larry B. Hofman

doi:10.1117/12.956688

7 December 1978 Comparison Of Video Fields And Frames For Transform Compression

Harry w. Jones Jr., Larry B. Hofman

Proceedings Volume 0149, Digital Image Processing II; (1978) https://doi.org/10.1117/12.956688
Event: 22nd Annual Technical Symposium, 1978, San Diego, United States

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.

Citation Download Citation

Harry w. Jones Jr. and Larry B. Hofman "Comparison Of Video Fields And Frames For Transform Compression", Proc. SPIE 0149, Digital Image Processing II, (7 December 1978); https://doi.org/10.1117/12.956688

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