Methods and apparatuses for encoding and decoding digital images or video streams
The invention relates to a method and an apparatus for encoding and/or decoding digital images, wherein said encoding apparatus (1100) comprises processing means (1110) configured for determining weights of a graph related to an image by minimizing a cost function, transforming said weights through a graph Fourier transform, quantizing the transformed weights, computing transformed coefficients through a graph Fourier transform of a graph having said the transformed weights as weights, de-quantizing the quantized transformed weights, computing a reconstructed image through an inverse graph Fourier transform on the basis of the de-quantized transformed weights, computing a distortion cost on the basis of the reconstructed image and the original image, generating a final encoded image on the basis of said distortion cost.
58545062
Alternative title(s) : (de) Verfahren und vorrichtungen zur codierung und decodierung digitaler bilder oder videodatenströme (fr) Procédés et appareils de codage et de décodage d'images numériques ou de flux vidéo
TTO:6.1634
Patent number | Country code | Kind code | Date issued |
US11122298 | US | B2 | 2021-09-14 |
CN110024391 | CN | B | 2021-07-30 |
EP3549344 | EP | B1 | 2021-03-03 |
US2020228840 | US | A1 | 2020-07-16 |
EP3549344 | EP | A1 | 2019-10-09 |
CN110024391 | CN | A | 2019-07-16 |
WO2018100503 | WO | A1 | 2018-06-07 |
IT201600122898 | IT | A1 | 2018-06-02 |