Low-delay buffering model in video coding

摘要

Techniques for low-delay buffering in a video coding process are disclosed. Video decoding techniques may include receiving a first decoded picture buffer (DPB) output delay and a second DPB output delay for a decoded picture, determining, for the decoded picture, a first DPB output time using the first DPB output delay in the case a hypothetical reference decoder (HRD) setting for a video decoder indicates operation at a picture level, and determining, for the decoded picture, a second DPB output time using the second DPB output delay in the case that the HRD setting for the video decoder indicates operation at a sub-picture level.

主权项

1. A method of decoding video, the method comprising:
receiving a first decoded picture buffer (DPB) output delay and a second DPB output delay; determining whether a hypothetical reference decoder (HRD) operates at an access unit level or operates at a sub-picture level; and based on a determination that the HRD operates at the access unit level, determining, by a video decoding device, for a decoded picture, a first DPB output time based on the first DPB output delay and a picture clock tick, or based on a determination that the HRD operates at the sub-picture level:
deriving a sub-picture clock tick based on the picture clock tick and a tick divisor value; anddetermining, by the video decoding device, for the decoded picture, a second DPB output time based on the second DPB output delay and the sub-picture clock tick.