Invention Grant
- Patent Title: Method for processing high dynamic range video in order to improve perceived visual quality of encoded content
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Application No.: US15046762Application Date: 2016-02-18
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Publication No.: US10129565B2Publication Date: 2018-11-13
- Inventor: Mathieu Monnier , Nicolas Ollivier
- Applicant: Mathieu Monnier , Nicolas Ollivier
- Main IPC: H04N19/593
- IPC: H04N19/593 ; H04N19/86

Abstract:
A method for processing High Dynamic Range (HDR) video in order to improve the perceived visual quality of encoded content. An encoder receives an original image, wherein a contrast analysis is performed on said original image in order to highlight potential problematic areas. The original image is reduced to a decreased bit depth image in order to compute a predicted image, wherein the predicted image is then magnified to an increased bit depth image. A residual image is then computed from the original image and the increased bit depth image, and the residual image is transformed into a frequency signal. Quantized coefficients determined through the contrast analysis are then applied to the frequency signal to produce a reduced frequency signal. The encoder then inserts high-frequency components into the reduced frequency signal before encoding a compressed image from the reduced frequency image and the predicted image.
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