Television – Bandwidth reduction system – Data rate reduction
Patent
1994-12-01
1995-11-14
Groody, James J.
Television
Bandwidth reduction system
Data rate reduction
348416, H04N 712
Patent
active
054671337
ABSTRACT:
An apparatus for compensating video motions in a digital TV, capable of encoding and decoding data at, a low clock frequency. The apparatus comprises a subtraction circuit, for generating an error signal indicative of the difference between video information of subframes of an input frame and video information of subframes of a previous frame motion-compensated, a signal coding circuit for transforming and quantizing the error signal to a finite number, a variable length encoding circuit for encoding the quantized error signal, a signal decoding circuit for dequantizing and inversely transforming the error signal from the signal coding circuit, an adding circuit for adding the error signal from the signal decoding circuit to the previously motion-compensated video information, a subframe storing circuit for storing the video information from the adding circuit, and a motion presumption/compensation circuit for detecting position data of moved pixels from the video information of the previous frame stored in the subframe storing circuit and the video information of the input frame, calculating positional vector amounts of the moved pixels from the detected position data, and compensating the video information of the previous frame by the calculated positional vector amounts.
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Goldstar Co. Ltd.
Grant Chris
Groody James J.
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