Method for video coding and electronic device configured for video coding

Abstract

A method for video coding is described. Signaling of a maximum number of sub-layers for inter-layer prediction is obtained. A sub-layer non-reference picture is also obtained. It is determined whether a value of a temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction minus 1. The sub-layer non-reference picture is marked as “unused for reference” if the value of the temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction minus 1. In some cases a sub-layer non-reference picture is also obtained. It is determined whether a value of a temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction. The sub-layer non-reference picture is marked as “unused for reference” if the value of the temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction.

What is claimed is: 
     
         1 . A method for video coding using circuitry, comprising:
 receiving a maximum number of sub-layers for inter-layer prediction plus one, wherein the maximum number of sub-layers for inter-layer prediction plus one indicates whether non-RAP pictures with a layer identifier equal to a layer identifier syntax element value are used as reference pictures for inter-layer prediction; and   determining whether a picture of a reference picture layer is marked as “used for long-term reference”; wherein   the picture of the reference picture layer is not marked as “used for long-term reference” in a case that the value of the maximum number of sub-layers for inter-layer prediction plus one is equal to zero and the picture of the reference picture layer is a random access point (RAP) picture.   
     
     
         2 . An electronic device configured for video coding,
 comprising:   a processor;   memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:   receive a maximum number of sub-layers for inter-layer prediction plus one, wherein the maximum number of sub-layers for inter-layer prediction plus one indicates whether non-RAP pictures with a layer identifier equal to a layer identifier syntax element value are used as reference pictures for inter-layer prediction; and   determine whether a picture of a reference picture layer is marked as “used for long-term reference”; wherein   the picture of the reference picture layer is not marked as “used for long-term reference” in a case that the value of the maximum number of sub-layers for inter-layer prediction plus one is equal to zero and the picture of the reference picture layer is a random access point (RAP) picture.