Video decoding method and apparatus using the same

摘要

Disclosed is a video decoding method that decodes a bitstream, the method including receiving a picture parameter set (PPS) comprising at least one of first information indicating whether the same reference picture list is applied to slices comprised in a picture and second information indicating whether additional information on modification of the reference picture list is present, and deriving a construction of the reference picture list based on the PPS. Accordingly, there are provided a method and an apparatus for signaling by a picture whether the construction of the reference picture list is modified when constructing the reference picture list.

主权项

1. A video decoding method, comprising:
obtaining, by a decoding apparatus, prediction mode information and a picture parameter set (PPS) from a received bitstream, the PPS comprising a list modification flag indicating whether information on modification of a reference picture list for a slice is present; deriving, by the decoding apparatus, the reference picture list based on the list modification flag; determining, by the decoding apparatus, based on the prediction mode information whether an intra prediction or an inter prediction is applied to a current block in a current picture; and generating, by the decoding apparatus, a prediction sample by using a reference picture comprised in the reference picture list when the inter prediction is applied to the current block, wherein the deriving of the reference picture list comprises constructing a forward short-term reference picture (STRP) set comprising pictures having smaller picture order count (POC) than POC of the current picture, a backward STRP set comprising pictures having greater POC than the POC of the current picture, and a long-term reference picture (LTRP) set, and generating the reference picture list based on the forward STRP set, the backward STRP set and the LTRP set.