Sub-nyquist sampling encoder and decoder.

摘要

A sub-Nyquist sampling encoder and decoder has a plurality of interpolators (7, 8; 24, 25; 42, 43) provided in an encoder and corresponding plural interpolators (14, 15; 34, 35) provided in a decoder. Information indicating which interpolator can be used to minimize the interpolation error is superimposed on a value of a non-thinned-out pixel and transmitted from the encoder to the decoder, and the decoder receiving the information is permitted to always perform optimum interpolation. The interpolation information is superimposed on the least significant bit of the value of the non-thinned-out pixel, with the view of effecting the superimposition without increasing the amount of transmission data and without degrading quality of the video signal.