Method and apparatus for coding motion pictures
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United States of America Patent
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Jun 9, 1992
Grant Date -
N/A
app pub date -
Mar 15, 1991
filing date -
Mar 15, 1991
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus for compressing motion pictures is disclosed. The frames of the motion picture are divided into adjacent groups. Each group is treated as a three-dimensional image. The three-dimensional image is then filtered via a three-dimensional FIR filter to generate three-dimensional component images that are more efficiently quantized. The degree of quantization of each component image is determined in part by the spatial frequencies represented by the component image in question. For motion pictures derrived from interlaced scanning devices, the quantization of specific component images is altered to prevent artifacts.
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