The image quality of video data is remarkably improved by a video data processing
device and a video data processing method according to the invention. The input
video data is adaptively filtered by adaptive filter 35 at the time coding
as a function of the degree of coding difficulty of image and the decoded video
data is adaptively compensated by adaptive image quality correcting circuit 50
as a function of the degree of coding difficulty of image to reduce the coding
noise and appropriately correct the image quality.
