HIERARCHICAL VIDEO SIGNAL ENCODER AND HIERARCHICAL VIDEO SIGNAL DECODER

摘要

PROBLEM TO BE SOLVED: To provide the hierarchical video signal encoder and the hierarchical video signal decoder by which a high resolution decoded video signal is obtained with less distortion. SOLUTION: This device is provided with a resolution converter A101 that converts resolution of an input high resolution signal into a low resolution signal, a video signal encoder A102 that decodes a low resolution signal stream obtained by encoding a low resolution signal from the resolution converter A101 by means of a prescribed video compression coding system A to provide an output of a low resolution decoded signal, and a resolution converter B103 that converts the resolution by using a horizontal filter and a vertical filter so as to provide the same resolution as that of a high resolution signal being an input signal to the low resolution decoded signal from the video signal coder A102 thereby providing an output of a resolution converted decoding signal and provides an output of a filter information signal including at least the number of taps of the horizontal filter, its coefficient and the number of taps of the vertical filter and its coefficient, and the filter information signal is sent to a receiver.