Rate control method for 360° video coding
AssigneeCity University of Hong Kong
InventorsShiqi WANG, Zeming ZHAO, Peilin CHEN
Life of this patent
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Abstract
A rate control method for 360° videos coding. The method includes the steps of: a) converting a 360° video from a sphere domain to a plane domain to obtain two-dimensional (2D) plane video; b) extracting latitude information from the 2D plane video; c) adjusting strip-level allocated bits of the 2D plane video with the latitude information; each strip comprising Coding Tree Units (CTUs) in one row; d) identifying key CTU indices of each frame of the 2D plane video based on gaze points; and e) optimizing a CTU-level coding parameter based on the key CTU indices and a distortion dependency. Such a method results in improved rate-distortion performance.
Claims12
A rate control method for 360° videos coding, comprising the steps:
- a) converting a 360° video from a sphere domain to a plane domain to obtain two-dimensional (2D) plane video;
- b) extracting latitude information from the 2D plane video;
- c) adjusting strip-level allocated bits of the 2D plane video with the latitude information;
- each strip comprising Coding Tree Units (CTUs) in one row;
- d) identifying key CTU indices of each frame of the 2D plane video based on gaze points;
- and
- e) optimizing a CTU-level coding parameter based on the key CTU indices and a distortion dependency.
The rate control method of claim 7, wherein the distortion dependency factor is derived from the comparison between current CTUs and reconstructed CTUs.
Dependencies are inferred from the claim text.