Patent ID: 11863765
Assignee: IMAGINATION TECHNOLOGIES LIMITED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of encoding a block of pixels into a compressed data structure, the method comprising:
determining a set of Haar coefficients for a 2×2 quad of pixels of the block of pixels, wherein the set of Haar coefficients comprises a plurality of differential coefficients and an average coefficient, wherein each of the plurality of differential coefficients has a magnitude;
determining a first portion of the compressed data structure using the differential coefficients determined for the 2×2 quad of pixels, wherein the first portion comprises:
a first set of bits which indicates an order of the magnitudes of the differential coefficients; and
a second set of bits which indicates a sign and an exponent for each of one or more of the differential coefficients which are non-zero;

determining a second portion of the compressed data structure using the average coefficient determined for the 2×2 quad of pixels; and
storing the compressed data structure.