Patent ID: 11870994
Assignee: PEKING UNIVERSITY SHENZHEN GRADUATE SCHOOL
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A system for inverse quantization, comprising:
an initial weighted inverse quantization matrix obtaining module, configured to determine an initial weighted inverse quantization matrix, wherein, the initial weighted inverse quantization matrix is the same as the quantized block in size;
an inverse quantization matrix correction module, configured to set some matrix elements in the initial weighted inverse quantization matrix to zero to obtain a weighted inverse quantization matrix, wherein, determining the matrix elements that need to be zeroed according to the size of the quantized block;
an inverse quantization calculation module, configured to weighted inverse quantize the quantized coefficients in the quantized block to generate corresponding inverse transform coefficients, wherein, the value of the matrix element corresponding to the position of the quantized coefficient in the weighted inverse quantization matrix is used as a weight coefficient of the weighted inverse quantization.