Gradual decoding refresh with temporal scalability support in video coding

A device for decoding video data, the device comprising:

• a memory configured to store encoded video data;
• and
• a video decoder configured to:
• receive a plurality of pictures of the encoded video data;
• receive, in a message associated with a first picture of the plurality of pictures, information indicating a POC value of a recovery point picture of a gradual decoder refresh (GDR) set;
• when a picture that follows the first picture in decoding order has the POC value that is equal to a POC value of the recovery point picture, identify the picture having the POC value equal to the POC value of the recovery point picture as a recovery point picture;
• and
• when none of the pictures that follow the first picture has the POC value that is equal to the POC value of the recovery point picture, identify one of the pictures that has a POC value greater than the POC value of the recovery point picture as the recovery point picture.

A computer-readable storage medium having stored thereon instructions that, when executed, cause a processor of a computing device to:

• receive a plurality of pictures from an encoded video bitstream;
• receive, from the encoded video bitstream a message associated with a first picture of the plurality of pictures, information indicating a POC value of a recovery point picture of a gradual decoder refresh (GDR) set;
• when a picture that follows the first picture in decoding order has the POC value that is equal to a POC value of the recovery point picture, identify the picture having the POC value equal to the POC value of the recovery point picture as a recovery point picture;
• and
• when none of the pictures that follow the first picture has the POC value that is equal to the POC value of the recovery point picture, identify one of the pictures that has a POC value greater than the POC value of the recovery point picture as the recovery point picture.

A device for decoding video data, the device comprising:

• means for receiving a plurality of pictures from an encoded video bitstream;
• means for receiving, from the encoded video bitstream a message associated with a first picture of the plurality of pictures, information indicating a POC value of a recovery point picture of a gradual decoder refresh (GDR) set;
• means for identifying, when a picture that follows the first picture in decoding order has the POC value that is equal to a POC value of the recovery point picture, the picture having the POC value equal to the POC value of the recovery point picture as a recovery point picture;
• and
• means for identifying, when none of the pictures that follow the first picture has the POC value that is equal to the POC value of the recovery point picture, one of the pictures that has a POC value greater than the POC value of the recovery point picture as the recovery point picture.