FIELD: data filtration technologies, in particular, signaling adaptive filtration for lower blocking effect and contour noise.
SUBSTANCE: during forming of frame, following operations are performed: production of blocking information for decreasing blocking noise and production of contouring information for decreasing contouring noise of coefficients of previously given pixels of upper and left threshold areas of data block, when frame, received by decomposition of image data in the stream of binary digits for inverse quantizing is an internal frame, and adaptive filtration of image data passing through inverse quantizing and inverse discontinuous cosine transformation, in accordance to produced blocking information and contouring information. Thus, blocking effect and contouring noise can be removed from image, restored from image on basis of blocks, improving the image restored from compression.
EFFECT: decreased blocking effect and contouring noise of encoding with high compression level.
2 cl, 7 dwg
