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公开(公告)号：US20240323421A1
公开(公告)日：2024-09-26
申请号：US18732084
申请日：2024-06-03
发明人： Zhouye Gu , Koohyar Minoo
CPC分类号： H04N19/44 , G06T5/92 , H04L65/70 , H04N19/136 , H04N19/46 , H04N19/85 , G06T2207/10016 , G06T2207/10024 , G06T2207/20004 , G06T2207/20208
摘要： A method of decoding a bitstream comprising decoding the bitstream into color values and metadata items indicating information about adaptive post-processing operations performed by a decoder, performing high dynamic range (HDR) adaptation operations on the color values based on the metadata items, and performing fixed post-processing operations to reconstruct an HDR video from the color values, wherein the HIDR adaptation operations convert color values into a format expected by the fixed post-processing operations.
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公开(公告)号：US20240323382A1
公开(公告)日：2024-09-26
申请号：US18733380
申请日：2024-06-04
发明人： Koohyar Minoo , Zhouye Gu , David M. Baylon , Ajay Luthra
IPC分类号： H04N19/124 , H04N19/117 , H04N19/136 , H04N19/172 , H04N19/174 , H04N19/179 , H04N19/182 , H04N19/186 , H04N19/36 , H04N19/46
CPC分类号： H04N19/124 , H04N19/117 , H04N19/136 , H04N19/172 , H04N19/182 , H04N19/186 , H04N19/36 , H04N19/46 , H04N19/174 , H04N19/179
摘要： A method of encoding a digital video data applies adaptive pre-processing to data representing high dynamic range (HDR) and/or wide color gamut (WCG) image data prior to encoding and complementary post-processing to the data after decoding in order to allow at least partial reproduction of the HDR and/or WCG data. The example methods apply one or more color space conversions, and a perceptual transfer functions to the data prior to quantization. The example methods apply inverse perceptual transfer functions and inverse color space conversions after decoding to recover the HDR and/or WCG data. The transfer functions are adaptive so that different transfer functions may be applied to video data sets including different groups of frames, frames or processing windows in a single frame. Information on the data set and information on the applied transfer function is passed as metadata from the encoder to the decoder.
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公开(公告)号：US12096014B2
公开(公告)日：2024-09-17
申请号：US18235700
申请日：2023-08-18
发明人： Koohyar Minoo , Zhouye Gu , David M. Baylon , Ajay Luthra
IPC分类号： H04N19/40 , H04N19/124 , H04N19/126 , H04N19/132 , H04N19/136 , H04N19/154 , H04N19/172 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/44 , H04N19/70 , H04N19/98
CPC分类号： H04N19/40 , H04N19/124 , H04N19/126 , H04N19/132 , H04N19/136 , H04N19/154 , H04N19/172 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/44 , H04N19/70 , H04N19/98
摘要： A method is provided for encoding a digital video to improve perceptual quality. The method includes receiving a digital video at a video encoder, providing a perceptual quantizer function defined by
P
Q
(
L
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=
(
c
1
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c
2
L
m
1
1
+
c
3
L
m
1
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m
2
,
wherein L is a luminance value, c1, c2, c3, and m1 are parameters with fixed values, and m2 is a parameter with a variable value, adapting the perceptual quantizer function by adjusting the value of the m2 parameter based on different luminance value ranges found within a coding level of the digital video, encoding the digital video into a bitstream using, in part, the perceptual quantizer function, transmitting the bitstream to a decoder, and transmitting the value of the m2 parameter to the decoder for each luminance value range in the coding level.-
公开(公告)号：US11997290B2
公开(公告)日：2024-05-28
申请号：US18227273
申请日：2023-07-27
发明人： Krit Panusopone , Koohyar Minoo , Yue Yu , Limin Wang
IPC分类号： H04N7/12 , G06T9/00 , G06T9/40 , H04N19/105 , H04N19/11 , H04N19/119 , H04N19/126 , H04N19/132 , H04N19/159 , H04N19/169 , H04N19/176 , H04N19/184 , H04N19/189 , H04N19/46 , H04N19/593 , H04N19/64 , H04N19/96
CPC分类号： H04N19/159 , G06T9/004 , G06T9/40 , H04N19/105 , H04N19/11 , H04N19/119 , H04N19/126 , H04N19/132 , H04N19/176 , H04N19/184 , H04N19/1883 , H04N19/189 , H04N19/46 , H04N19/593 , H04N19/647 , H04N19/96
摘要： A method of decoding JVET video, comprising receiving a bitstream indicating how a coding tree unit was partitioned into coding units according to a partitioning structure that allows nodes to be split according to a partitioning technique. An intra direction mode for a coding unit may be selected, as well as one or more of the plurality of reference lines to generate at least one predictor for the intra direction mode. A predictor may be generated from reference samples within each selected reference line by combining predicted pixel values based on a projected position on a main reference line in combination with predicted pixel values based on a projected position on a side reference line. The predicted pixel values are weighted according to a weight parameter, wherein the weight parameter is determined based on a shift conversion factor.
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公开(公告)号：US11936856B2
公开(公告)日：2024-03-19
申请号：US18134279
申请日：2023-04-13
发明人： Krit Panusopone , Limin Wang , Koohyar Minoo
IPC分类号： H04N19/107 , H04N19/105 , H04N19/149 , H04N19/176 , H04N19/64 , H04N19/91 , H04N19/11 , H04N19/196 , H04N19/503 , H04N19/593
CPC分类号： H04N19/107 , H04N19/105 , H04N19/149 , H04N19/176 , H04N19/647 , H04N19/91 , H04N19/11 , H04N19/197 , H04N19/503 , H04N19/593
摘要： A method of decoding JVET video, comprising defining a coding unit (CU) template within a decoded area of a video frame, the CU template being positioned above and/or to the left of a current decoding position for which data was intra predicted, defining a search window within the decoded area, the search window being adjacent to the CU template, generating a plurality of candidate prediction templates based on pixel values in the search window, each of the plurality of candidate prediction templates being generated using different intra prediction modes, calculating a matching cost between the CU template and each of the plurality of candidate prediction templates, selecting an intra prediction mode that generated the candidate prediction template that had the lowest matching cost relative to the CU template, and generating a prediction CU for the current decoding position based on the intra prediction mode.
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6.发明公开公开(公告)号：US20230362376A1
公开(公告)日：2023-11-09
申请号：US18223963
申请日：2023-07-19
发明人： Koohyar Minoo , Zhouye GU , David M. Baylon , Ajay Luthra , Yue Yu
IPC分类号： H04N19/124 , H04N19/186 , H04N19/44 , G06T5/00 , H04N19/98 , H04N19/70 , H04N19/174 , H04N19/177
CPC分类号： H04N19/124 , H04N19/186 , H04N19/44 , G06T5/007 , H04N19/98 , H04N19/70 , H04N19/174 , H04N19/177 , G06T2207/20208
摘要： A method for transforming high dynamic range (HDR) video data into standard dynamic range (SDR) video data and encoding the SDR video data so that the HDR video data may be recovered at the decoder includes generating a tone map describing a transformation applied to the HDR video data to generate the SDR video data. The generated tone map describes the transformation as the multiplication of each HDR pixel in the HDR video data by a scalar to generate the SDR video data. The tone map is then modeled as a reshaping transfer function and the HDR video data is processed by the reshaping transfer function to generate the SDR video data. The reshaping transfer function is then inverted and described in a self-referential metadata structure. The SDR video data is then encoded including the metadata structure defining the inverse reshaping transfer function.
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公开(公告)号：US20230336786A1
公开(公告)日：2023-10-19
申请号：US18213161
申请日：2023-06-22
发明人： Koohyar Minoo , David M. Baylon
IPC分类号： H04N19/80 , H04N19/117 , H04N19/30
CPC分类号： H04N19/80 , H04N19/117 , H04N19/30 , H04N19/70
摘要： In one embodiment, a method receives a plurality of sample values. The method then determines a filter to determine an up-sampled value for a first layer for a video, wherein the filter has a set of coefficient values of [−1, 3, −9, 47, 31, −10, 4, −1] or [−1, 4, −10, 31, 47, −9, 3, −1] assigned to the filter. The up-sampled value is determined by applying the set of coefficient values of [−1, 3, −9, 47, 31, −10, 4, −1] or [−1, 4, −10, 31, 47, −9, 3, −1] to the plurality of sample values. The method then outputs the up-sampled value for use in coding a second layer of a higher resolution than the first layer. The up-sampled values may be for the 6/16 and −6/16 phase offsets.
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公开(公告)号：US11368701B2
公开(公告)日：2022-06-21
申请号：US16909698
申请日：2020-06-23
发明人： Koohyar Minoo , Zhouye Gu , David M. Baylon , Ajay Luthra
IPC分类号： H04N19/40 , H04N19/176 , H04N19/172 , H04N19/154 , H04N19/132 , H04N19/44 , H04N19/98 , H04N19/124 , H04N19/126 , H04N19/136 , H04N19/186 , H04N19/70 , H04N19/184
摘要： A method is provided for encoding a digital video to improve perceptual quality. The method includes receiving a digital video at a video encoder, providing a perceptual quantizer function defined by P Q ( L ) = ( c 1 + c 2 L m 1 1 + c 3 L m 1 ) m 2 , wherein L is a luminance value, c1, c2, c3, and m1 are parameters with fixed values, and m2 is a parameter with a variable value, adapting the perceptual quantizer function by adjusting the value of the m2 parameter based on different luminance value ranges found within a coding level of the digital video, encoding the digital video into a bitstream using, in part, the perceptual quantizer function, transmitting the bitstream to a decoder, and transmitting the value of the m2 parameter to the decoder for each luminance value range in the coding level.
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公开(公告)号：US11310494B2
公开(公告)日：2022-04-19
申请号：US17199117
申请日：2021-03-11
发明人： Krit Panusopone , Limin Wang , Koohyar Minoo
IPC分类号： H04N19/107 , H04N19/105 , H04N19/176 , H04N19/149 , H04N19/64 , H04N19/91 , H04N19/503 , H04N19/593 , H04N19/11 , H04N19/196
摘要： A method of decoding JVET video, comprising defining a coding unit (CU) template within a decoded area of a video frame, the CU template being positioned above and/or to the left of a current decoding position for which data was intra predicted, defining a search window within the decoded area, the search window being adjacent to the CU template, generating a plurality of candidate prediction templates based on pixel values in the search window, each of the plurality of candidate prediction templates being generated using different intra prediction modes, calculating a matching cost between the CU template and each of the plurality of candidate prediction templates, selecting an intra prediction mode that generated the candidate prediction template that had the lowest matching cost relative to the CU template, and generating a prediction CU for the current decoding position based on the intra prediction mode.
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10.发明授权公开(公告)号：US11277610B2
公开(公告)日：2022-03-15
申请号：US15274486
申请日：2016-09-23
发明人： Koohyar Minoo , Zhouye Gu , David M. Baylon , Ajay Luthra , Yue Yu
IPC分类号： H04N19/12 , H04N19/124 , H04N19/186 , H04N19/44 , G06T5/00 , H04N19/98 , H04N19/70 , H04N19/174 , H04N19/177
摘要： A method for transforming high dynamic range (HDR) video data into standard dynamic range (SDR) video data and encoding the SDR video data so that the HDR video data may be recovered at the decoder includes generating a tone map describing a transformation applied to the HDR video data to generate the SDR video data. The generated tone map describes the transformation as the multiplication of each HDR pixel in the HDR video data by a scalar to generate the SDR video data. The tone map is then modeled as a reshaping transfer function and the HDR video data is processed by the reshaping transfer function to generate the SDR video data. The reshaping transfer function is then inverted and described in a self-referential metadata structure. The SDR video data is then encoded including the metadata structure defining the inverse reshaping transfer function.
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