IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, AND IMAGE DECODING METHOD Russian patent published in 2017 - IPC H04N19/117 H04N19/463 H04N19/86 

FIELD: physics.

SUBSTANCE: device contains an image compressing means, a filter, an encoder. The image compressing means quantizes the difference image transformation coefficients between the image and the prediction image and outputs the quantized transform coefficients as compressed data. The filter performs a filtering process on the decoded image, which is the result of adding the difference image decoded from the compressed data and the prediction image. The encoder encodes the compressed data and the filter parameter used in the execution of the filtering process, and generates a bitstream.

EFFECT: increasing the efficiency of encoding, decoding images by reducing the code amount required to encode the offset value.

4 cl, 28 dwg