Nonlinear aspect ratio adaptation

摘要

The adaptation of the picture signal aspect ratio provides a second derivative D2 of the expansion factor EF in response to at least one constant value C1 and C2 and an expansion factor EF in response to the second derivative D2, (3-13) in response to the first factor (D1), providing an expansion factor (EF) in response to the first derivative (D1) (14-21) To adapt the aspect ratio of the image signal so that the use of an expansion factor (EF) less than one causes the image signal to be compressed.