公开(公告)号：US20210400273A1

公开(公告)日：2021-12-23

申请号：US17234596

申请日：2021-04-19

Applicant: Apple Inc.

Inventor： Krishnakanth RAPAKA ,  Jaehong CHON ,  Alexandros TOURAPIS ,  David W. SINGER

IPC: H04N19/124 ,  H04N19/82 ,  H04N19/186 ,  H04N19/172

Abstract: Improved video coding and decoding techniques are described, including techniques to derive quantization step sizes adaptively with quantization step size table templates. Quantization techniques described provide finer-grained control over quantization with a more flexible quantization step size especially at higher degrees of quantization. This may result in improved overall compression quality. Other coding parameters, such as in-loop filtering parameters, may be derived based on the more flexible quantization parameters.