POC value design for multi-layer video coding
AssigneeQUALCOMM Incorporated
InventorsFnu Hendry, Adarsh Krishnan Ramasubramonian, Ye-Kui Wang
Life of this patent
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Abstract
In an example, a method of coding video data includes coding, by a video coder, at least a portion of a picture of an independently decodable non-base layer of a multi-layer bitstream. The method also includes coding, by the video coder, data indicating a picture order count (POC) value reset for a POC least significant bits (LSB) value of the picture only when the picture has a POC LSB value for the picture is equal to zero.
Claims25
A method of coding video data, the method comprising:
- coding, in a slice header of a slice segment of a current picture, a first syntax element, the first syntax element indicating Least Significant Bits (LSBs) of a Picture Order Count (POC) of the current picture, the current picture being in an independently decodable non-base layer of a multi-layer bitstream;
- and
- coding, in the slice header of the slice segment of the current picture, a POC value reset index, wherein the POC value reset index equal to 2 indicates a reset of both most significant bits (MSBs) of the POC of the current picture and the LSBs of the POC of the current picture,
- wherein a constraint provides that based on the first syntax element being greater than 0, the POC value reset index shall not be equal to 2.
A device for coding video data, the device comprising:
- a memory configured to store an independently decodable non-base layer of video data of a multi-layer bitstream;
- and
- a video coder configured to:
- code, in a slice header of a slice segment of a current picture, a first syntax element, the first syntax element indicating Least Significant Bits (LSBs) of a Picture Order Count (POC) of the current picture, the current picture being in the independently decodable non-base layer of the multi-layer bitstream;
- and
- code, in the slice header of the slice segment of the current picture, a POC value reset index, wherein the POC value reset index equal to 2 indicates a reset of both most significant bits (MSBs) of the POC of the current picture and the LSBs of the POC of the current picture,
- wherein a constraint provides that based on the first syntax element being greater than 0, the POC value reset index shall not be equal to 2.
A device for coding video data, the device comprising:
- means for coding, in a slice header of a slice segment of a current picture, a first syntax element, the first syntax element indicating Least Significant Bits (LSBs) of a Picture Order Count (POC) of the current picture, the current picture being in an independently decodable non-base layer of a multi-layer bitstream;
- and
- means for coding, in the slice header of the slice segment of the current picture, a POC value reset index, wherein the POC value reset index equal to 2 indicates a reset of both most significant bits (MSBs) of the POC of the current picture and the LSBs of the POC of the current picture,
- wherein a constraint provides that based on the first syntax element being greater than 0, the POC value reset index shall not be equal to 2.
A non-transitory computer-readable storage medium having stored thereon instructions that, when executed, cause a processor of a device for coding video data to:
- code, in a slice header of a slice segment of a current picture, a first syntax element, the first syntax element indicating Least Significant Bits (LSBs) of a Picture Order Count (POC) of the current picture, the current picture being in an independently decodable non-base layer of a multi-layer bitstream;
- and
- code, in the slice header of the slice segment of the current picture, a POC value reset index, wherein the POC value reset index equal to 2 indicates a reset of both most significant bits (MSBs) of the POC of the current picture and the LSBs of the POC of the current picture,
- wherein a constraint provides that based on the first syntax element being greater than 0, the POC value reset index shall not be equal to 2.
Dependencies are inferred from the claim text.