| 摘要 |
<p>Coding a block of a picture in a video sequence, comprising, for at least one portion of the block, encoding a colour based on a colour palette with several colour elements, said method comprising for a current portion, inserting said portions current colour in the colour palette as a new colour element 1409, if the current colour is not present in the colour palette and the absolute difference between the current colour and each and every colour element in the palette is superior to a predetermined threshold 1407, wherein said threshold is adaptive. Preferably the coding of the block comprises using a given mode, preferably a transform skip mode, having a quantization step based on quantization parameters. Further independent claims are included for: encoding the colour of a current portion by allocating to it a colour element from the colour palette before updating the definition of the colour element based on the colours of all portions to which said colour element had been allocated; and for encoding the colour of a current portion by determining a prediction mode among at least two prediction modes.</p> |
