Title:
ビデオ符号化及び復号のための適応的伝達関数
Document Type and Number:
Japanese Patent JP7038021
Kind Code:
B2
Abstract:
A video encoding and decoding system that implements an adaptive transfer function method internally within the codec for signal representation. A focus dynamic range representing an effective dynamic range of the human visual system may be dynamically determined for each scene, sequence, frame, or region of input video. The video data may be cropped and quantized into the bit depth of the codec according to a transfer function for encoding within the codec. The transfer function may be the same as the transfer function of the input video data or may be a transfer function internal to the codec. The encoded video data may be decoded and expanded into the dynamic range of display(s). The adaptive transfer function method enables the codec to use fewer bits for the internal representation of the signal while still representing the entire dynamic range of the signal in output.
Inventors:
Turapis, Alexis
Singer, David
Singer, David
Application Number:
JP2018146796A
Publication Date:
March 17, 2022
Filing Date:
August 03, 2018
Export Citation:
Assignee:
Apple Inc.
International Classes:
H04N19/85; H04N19/102; H04N19/136; H04N19/179; H04N19/196; H04N19/46
Domestic Patent References:
| JP2002542739A | ||||
| JP2008501261A | ||||
| JP2013517723A |
Foreign References:
| WO2013046096A1 |
Other References:
Jens-Uwe Garbas,Herbert Thoma,”TEMPORALLY COHERENT LUMINANCE-TO-LUMA MAPPING FOR HIGH DYNAMIC RANGE VIDEO CODING WITH H.264/AVC”,Proceedings of 2011 IEEE International Conference on Acoustics,Speech and Signal Processing,2011.5.22,p.829-832
Attorney, Agent or Firm:
Patent Business Corporation Otsuka International Patent Office
Yasunori Otsuka
Yasuhiro Otsuka
Shiro Takayanagi
Shuji Kimura
Osamu Shimoyama
Nagakawa Yumitsu
Yasuhiro Sakata
Yasunori Otsuka
Yasuhiro Otsuka
Shiro Takayanagi
Shuji Kimura
Osamu Shimoyama
Nagakawa Yumitsu
Yasuhiro Sakata