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

Claim 19:
20. A non-transitory computer readable storage medium having stored thereon an integrated circuit definition dataset that, when processed in an integrated circuit manufacturing system, configures the integrated circuit manufacturing system to manufacture an encoding unit which is configured to encode a block of pixels into a compressed data structure, the encoding unit comprising:
a Haar coefficient determining module configured to determine 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; and
a coefficient encoding module configured to determine 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;

wherein the encoding unit is configured to:
determine a second portion of the compressed data structure using the average coefficient determined for the 2×2 quad of pixels; and
output the compressed data structure for storage.