Video decoder with signaling

Abstract

A method of decoding a video bitstream is disclosed. The method includes: using a set of previously decoded pictures for decoding a subsequent picture; receiving a delta_poc_msb_present_flag indicating whether a delta_poc_msb_cycle_lt is present or not present, wherein the delta_poc_msb_cycle_lt being present indicates that more than one reference picture in the set of previously decoded pictures having same value, wherein the first previously decoded picture has a temporal ID being equal to zero, is not a RASL picture, not a RADL picture, not a sub-layer non-reference picture.

What is claimed is: 
     
         1 . A video encoding method, comprising:
 encoding a first indicator of a first picture as a first value, when at least two reference pictures of the first picture in the coded picture buffer have a same picture order count modulo;   setting a first indicator of a second picture as the first value, wherein the second picture is a subsequent picture of the first picture in encoding order, and wherein the first picture has a temporal layer ID value of 0 and has a NAL unit type as one of the following: random access skipped leading (RASL) picture, random access decodable leading (RADL) picture and a sub-layer non-reference picture; and   encoding the second picture based on the first indicator of the second picture.   
     
     
         2 . A video decoding method, comprising:
 parsing a first indicator of a first picture, when the first picture has a temporal layer ID value of 0 and has a NAL unit type as one of the following: RASL picture, RADL picture and a sub-layer non-reference picture, wherein the first indicator of the first picture is a first value when at least two reference pictures of the first picture in the coded picture buffer have a same picture order count modulo;   setting a first indicator of a second picture as the first value, when the first indicator of the first picture is the first value, wherein the second picture is a subsequent picture of the first picture in decoding order; and   decoding the second picture based on the first indicator of the second picture.   
     
     
         3 . A video decoding apparatus, comprising:
 a memory; and   a processor;   the processor coupled to the memory is configured to:   parse a first indicator of a first picture, when the first picture has a temporal layer ID value of 0 and has a NAL unit type as one of the following: RASL picture, RADL picture and a sub-layer non-reference picture, wherein the first indicator of the first picture is a first value when at least two reference pictures of the first picture in the coded picture buffer have a same picture order count modulo;   set a first indicator of a second picture as the first value, when the first indicator of the first picture is the first value, wherein the second picture is a subsequent picture of the first picture in decoding order; and   decode the second picture based on the first indicator of the second picture.