Patent ID: 11968376
Assignee: UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A reference image decoding device, comprising:
a processor; and
a memory coupled to the processor, having processor-readable instructions stored thereon, wherein the processor-readable instructions when executed by the processor cause the processor to implement operations including:
parsing a bitstream, to obtain: coding information, a reconstructed image of a first reference image, and a reconstructed image of a second reference image, wherein the first reference image is decoded before the second reference image;
determining, after the bitstream is parsed to obtain the reconstructed image of the second reference image, according to the coding information and a preset rule, whether a local area in the second reference image is used to update a corresponding area or a related area in the first reference image, wherein a size of the local area is less than or equal to a size of the second reference image; and
responsive to determining that the local area in the second reference image is used to update the corresponding area or the related area in the first reference image, replacing a pixel value of the corresponding area or the related area in the first reference image with a pixel value of the local area in the second reference image,
wherein the coding information comprises a quantization parameter offset value of the local area in the second reference image; and
wherein determining whether the local area in the second reference image is used to update the corresponding area or the related area in the first reference image comprises:
responsive to determining that an absolute value of the quantization parameter offset value falls within a first value range, determining, that the local area in the second reference image is used to update the corresponding area or the related area in the first reference image.