Transform coefficient dequantization method and apparatus, and decoding device

摘要

A unit size of a to-be-processed unit corresponding to a first transform coefficient set is determined using division information. Then, a quantization regulation factor for the first transform coefficient set is determined according to a first preset algorithm and the unit size of the to-be-processed unit, and with the first preset algorithm, the quantization regulation factor decreases progressively with the size of the to-be-processed unit. Dequantization processing is performed on a transform coefficient in the first transform coefficient set according to a second preset algorithm using the quantization regulation factor. Therefore, a decoding device adaptively determines the quantization regulation factor for the first transform coefficient set according to the unit size of the to-be-processed unit, and then performs dequantization processing on the transform coefficient in the first transform coefficient set using the determined quantization regulation factor.