Harmonization of transform-based quantization and dynamic range adjustment scale derivation in video coding
AssigneeQUALCOMM Incorporated
InventorsAdarsh Krishnan Ramasubramonian, Dmytro Rusanovskyy, Marta Karczewicz
Life of this patent
Estimating the term…
Abstract
Techniques for decoding video data include determining a picture quantization parameter (QP) value of the picture of video data, determining an intermediate chroma QP offset value for a chroma QP value based on the picture QP value and a first function based on video characteristics of the picture of video data, determining the chroma QP value with a second function of the intermediate chroma QP offset value, and decoding the picture of video data using the chroma QP value.
Claims30
A method of decoding a picture of video data, the method comprising:
- determining a picture quantization parameter (QP) value of the picture of video data;
- determining an intermediate chroma QP offset value for a chroma QP value using the picture QP value and a first function based on video characteristics of the picture of video data;
- determining the chroma QP value with a second function of the intermediate chroma QP offset value;
- and
- decoding the picture of video data using the chroma QP value to produce a decoded picture.
An apparatus configured to decode video data, the apparatus comprising:
- a memory configured to store a picture of video data;
- and
- one or more processors in communication with the memory, the one or more processors configured to:
- determine a picture quantization parameter (QP) value of the picture of video data;
- determine an intermediate chroma QP offset value for a chroma QP value using the picture QP value and a first function based on video characteristics of the picture of video data;
- determine the chroma QP value with a second function of the intermediate chroma QP offset value;
- and
- decode the picture of video data using the chroma QP value to produce a decoded picture.
An apparatus configured to decode video data, the apparatus comprising:
- means for determining a picture quantization parameter (QP) value of the picture of video data;
- means for determining an intermediate chroma QP offset value for a chroma QP value using the picture QP value and a first function based on video characteristics of the picture of video data;
- means for determining the chroma QP value with a second function of the intermediate chroma QP offset value;
- and
- means for decoding the picture of video data using the chroma QP value to produce a decoded picture.
A computer-readable storage medium storing instructions that, when executed, cause one or more processors of a device configured to decode video data to:
- determine a picture quantization parameter (QP) value of the picture of video data;
- determine an intermediate chroma QP offset value for a chroma QP value using the picture QP value and a first function based on video characteristics of the picture of video data;
- determine the chroma QP value with a second function of the intermediate chroma QP offset value;
- and
- decode the picture of video data using the chroma QP value to produce a decoded picture.
Dependencies are inferred from the claim text.