RANDOM ACCESS WITH ADVANCED DECODED PICTURE BUFFER (DPB) MANAGEMENT IN VIDEO CODING

摘要

As one example, techniques for decoding video data include receiving a bitstream that includes one or more pictures of a coded video sequence (CVS), decoding a first picture according to a decoding order, wherein the first picture is a random access point (RAP) picture that is not an instantaneous decoding refresh (IDR) picture, and decoding at least one other picture following the first picture according to the decoding order based on the decoded first picture. As another example, techniques for encoding video data include generating a bitstream that includes one or more pictures of a CVS, wherein a first picture according to the decoding order is a RAP picture that is not an IDR picture, and avoiding including at least one other picture, other than the first picture, that corresponds to a leading picture associated with the first picture, in the bitstream.

主权项

1. A method of decoding video data, the method comprising:
receiving a bitstream comprising one or more pictures of a coded video sequence (CVS); decoding a first picture of the one or more pictures according to a decoding order associated with the CVS, wherein the first picture is a random access point (RAP) picture that is not an instantaneous decoding refresh (IDR) picture; decoding at least one of the one or more pictures, other than the first picture, following the first picture according to the decoding order, based on the decoded first picture; identifying at least one of the one or more pictures, other than the first picture, that corresponds to a leading picture associated with the first picture, wherein the leading picture comprises a picture that follows the first picture according to the decoding order and precedes the first picture according to a display order associated with the CVS; and decoding the at least one of the one or more pictures, wherein decoding each of the at least one of the one or more pictures includes:
identifying one or more reference pictures used to encode the respective picture;determining whether any of the identified one or more reference pictures is unavailable to be decoded;for each of the identified one or more reference pictures that is determined to be unavailable to be decoded, generating a virtual reference picture; anddecoding the respective picture based on the corresponding one or more generated virtual reference pictures.