Patent ID: 11924476
Assignee: GOOGLE LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A device for restoring a degraded frame resulting from reconstruction of a source frame, the device comprising a processor configured to:
receive a compressed bitstream, wherein the compressed bitstream comprises:
a first projection parameter α a second projection parameter β;
first restoration parameters comprising a first radius value; and
second restoration parameters comprising a second radius value; and

restore at least a portion of the degraded frame using a projection operation that uses the first projection parameter α, the second projection parameter β, and at least two guide tiles, wherein to restore the at least the portion of the degraded frame comprises to:
generate, using the first restoration parameters, a first guide tile Y1 for a degraded tile Y of the degraded frame;
generate, using the second restoration parameters, a second guide tile Y2 for the degraded tile Y; and
generate a reconstructed tile YR of a reconstructed frame, wherein the projection operation comprises calculating α(Y1−Y)+β(Y2−Y).