Patent ID: 6097759
Filing Date: 2000-08-01
Classification: H04N

Abstract:
A video signal encoder for encoding a first motion video signal representative of sequential video images including first and second video images into a second motion video signal comprising:a predictive error signal generator for generating a predictive error signal representative of the error in the second video image based on a prediction formed at least in part from the first video image;a coder for transform coding the predictive error signal to produce a coded predictive error signal, said coder varying the scanning sequence of the transform coefficients thereof;a local decoder detecting the scanning sequence of transform coefficients used in transform coding, and decoding the transform coefficients of the coded predictive error signal to produce information representative of the first motion video signal including the first video image;a combiner, operatively connected to said local decoder, and combining the predictive error signal with a predictive signal;an image data memory, operatively connected to said combiner, for storing information representative of the first video image as image data;a predictive signal generator, operatively connected to said image data memory, and supplying the predictive signal from the image data stored in said image data memory to said predictive error signal generator and said combiner;wherein a signal representative of the second video image of the first motion video signal is assembled from the predictive error signal developed from a difference between the first video image and the second video image;wherein the coded predictive error signal from said coder is output as the second motion video signal.