Patent ID: 9565432
Date: 2017-02-07
CPC Classifications: H04N

Claim:
1. A video decoding method comprising: receiving a bitstream comprising information on a random access point picture, leading pictures, and normal pictures, wherein the leading pictures precede the random access point picture in output order and the normal pictures follow the random access point picture in output order; decoding the random access point picture; decoding at least one of the leading pictures or the normal pictures; and outputting the decoded random access point picture and the normal pictures, wherein the random access point picture is a clean random access (CRA) picture or an instantaneous decoding refresh (IDR) picture, wherein the leading pictures are not used as reference pictures of the normal pictures, wherein a leading picture associated with the CRA picture is not output if the random access point picture is the CRA picture and a random access happens to the CRA picture, and wherein a leading picture associated with the IDR picture is decoded by using at least one of the IDR picture or another leading picture as a reference picture if the random access point picture is the IDR picture and the random access happens to the IDR picture.