Patent ID: 9350992
Filing Date: 2016-05-24
CPC Classification: H04N

Claim Text:
1. A method for use in encoding and decoding a group of pictures in a video stream comprising: identifying a current picture in the group of pictures for encoding or decoding; identifying a collocated picture in the group of pictures using syntax to determine if a collocated picture index should be accessed to identify the collocated picture; using the collocated picture to encode or decode the current picture; providing a first reference picture set number for a reference picture set including all reference pictures that are prior to the current picture in decoding order, and that may be used in inter prediction of the current picture; determining if the first reference picture set number is greater than 1, and if so providing a first collocated picture index list for the reference picture set; providing a second reference picture set number for a reference picture set including all reference pictures that are prior to the current picture in decoding order and that may be used in inter prediction of the current picture; determining if the second reference picture set number is greater than 1, and if so providing a second collocated picture index list in the reference picture set, wherein at least one of the first and second index list identify the collocated picture; and determining from a state of a flag if the collocated picture can be located using the first collocated picture index list or the second collocated picture index list.