Television – Bandwidth reduction system – Data rate reduction
Patent
1996-10-31
1998-06-09
Lee, Richard
Television
Bandwidth reduction system
Data rate reduction
348416, 348699, H04N 732
Patent
active
057642940
ABSTRACT:
A video coding device has an image motion detector, an inter-frame differencer, a discrete cosine transforming unit, and a variable length coder mounted on a single LSI. The video coding device further includes a first memory for storing a video signal block composed of a luminance signal and two color difference signals of the current frame, a second memory for storing a searching area for the luminance signal block of the previous frame, and a third memory for storing blocks of the luminance signal and two color difference signals corresponding to the detected motion vector. The video coding device operates to concurrently execute a process for detecting motion of an image from the luminance signals stored in the first and the second memories using the motion detector, a process for coding a video signal from the luminance signal and two color difference signals stored in the first and the third memories using an inter-frame predictor and a coder, and a process for outputting the coded signal at each of the serial macro blocks composing the input video signal.
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Fukuda Naoyuki
Kawahara Kenji
Lee Richard
Sharp Kabushiki Kaisha
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