Image signal band compressing system for digital video tape recorder
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United States of America Patent
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Mar 29, 1994
Grant Date -
N/A
app pub date -
Dec 18, 1992
filing date -
Feb 28, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
The image signal band compressing method employs a three-dimensional motion compensating technique, an intraframe and an interframe processes which are alternatively executed. The transfer rate of the intraframe to the interframe is set to 4:1 in a unit of fixed length. The intraframe process is defined such that the present frame image data is compressed in a variable length compressing manner by way of two-dimensional discrete coding transform. The interframe process is defined such that motion data is estimated by comparing the present frame and the preceding frame, the present frame is expected on the basis of the motion data and the difference data between the motion compensated image data and the present frame data.
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