Video encoding method and video decoding method

摘要

A video encoding method using a plurality of reference pictures includes: selecting whether or not a resilient picture referencing scheme is to be used for encoding video; writing a parameter indicating the selection into a header of an encoded video bitstream; and encoding a picture using inter-picture prediction using a result of the selection.

主权项

1. A video decoding method for decoding a bitstream corresponding to a current picture in a video using one or more reference pictures, the video decoding method comprising:
obtaining a classification of a picture in the video; judging whether or not the picture is a key picture having a predetermined frame type; selecting, when the classification of the current picture is a predetermined classification indicating a picture usable as a switching point, one or more valid reference pictures from among all valid reference pictures for the current picture in a reference picture memory, each of the valid reference pictures for the current picture being the key picture; constructing a reference picture list including at least one of the one or more valid reference pictures; and decoding the current picture by performing motion prediction on the current picture using the valid reference pictures included in the reference picture list, wherein in the judging, the picture is judged to be the key picture when a frame type parameter of the picture is zero, and wherein, in the selecting, when the classification of the current picture is the predetermined classification and when the frame type parameter of the current picture is greater than zero, only the one or more valid reference pictures are selected, each of the one or more valid reference pictures being the key picture.