| 摘要 |
A method of encoding data having at least first, second and third portions including the step of forming an estimate of the accuracy of a prediction of the second portion based on the first portion and selectively predicting the third portion based on the second portion and the estimation of accuracy. Also described are a method of coding a picture which is partitioned into first and second portions comprising the steps of predicting elements of the second portion and coding the difference between elements of the second portion and the predictions; a method of coding wherein elements of a second portion are predicted by horizontally displacing elements of a second portion, the portions preferably being first and second fields of an interlaced image; a method of hierarchical coding wherein quantisation parameters of a child coding level are selected according to the quantisation parameters of a corresponding parent level and a method of coding a sequence of pictures comprising selecting a subset of the pictures, interpolating the remaining pictures from the subset and transmitting the subset of pictures with adjustment information to enable the decoder to reconstruct corrected versions of the interpolated pictures. |
