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公开(公告)号：US11758153B2
公开(公告)日：2023-09-12
申请号：US17687442
申请日：2022-03-04
发明人： Krit Panusopone , Koohyar Minoo , Yue Yu , Limin Wang
IPC分类号： H04N7/12 , H04N19/159 , H04N19/593 , H04N19/105 , H04N19/11 , H04N19/119 , H04N19/132 , H04N19/176 , H04N19/46 , H04N19/96 , H04N19/189 , H04N19/64 , G06T9/00 , G06T9/40 , H04N19/126 , H04N19/184 , H04N19/169
CPC分类号： H04N19/159 , G06T9/004 , G06T9/40 , H04N19/105 , H04N19/11 , H04N19/119 , H04N19/126 , H04N19/132 , H04N19/176 , H04N19/184 , H04N19/189 , H04N19/1883 , 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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62.发明公开公开(公告)号：US20230171429A1
公开(公告)日：2023-06-01
申请号：US18103179
申请日：2023-01-30
发明人： Koohyar Minoo
IPC分类号： H04N19/60 , H04N19/105 , H04N19/124 , H04N19/186 , H04N19/46 , G06T5/00 , H04N19/85 , H04N19/182 , H04N1/60 , G06T5/50 , H04N19/117 , H04N1/64
CPC分类号： H04N19/60 , G06T5/009 , G06T5/50 , H04N1/64 , H04N1/603 , H04N19/46 , H04N19/85 , H04N19/105 , H04N19/117 , H04N19/124 , H04N19/182 , H04N19/186 , H04N19/17
摘要： A method of encoding a digital video, comprising receiving a high dynamic range (HDR) master of a video, a reference standard dynamic range (SDR) master of the video, and target SDR display properties at an encoder, finding a color volume transform that converts HDR values from the HDR master into SDR values that, when converted for display on the target SDR display, are substantially similar to SDR values in the reference SDR master, converting HDR values from the HDR master into SDR values using the color volume transform, generating metadata items that identifies the color volume transform to decoders, and encoding the SDR values into a bitstream.
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公开(公告)号：US11659168B2
公开(公告)日：2023-05-23
申请号：US17694528
申请日：2022-03-14
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
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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64.发明申请公开(公告)号：US20220385929A1
公开(公告)日：2022-12-01
申请号：US17886003
申请日：2022-08-11
发明人： Koohyar Minoo , David M. Baylon , Ajay K. Luthra
IPC分类号： H04N19/30 , H04N19/70 , H04N19/134 , H04N19/186 , H04N19/187 , H04N19/80 , H04N19/33 , H04N19/117
摘要： A sampling filter process is provided for scalable video coding. The process provides for re-sampling using video data Obtained from an encoder or decoder process of a base layer (BL) in a multi-layer system using adaptive phase shifting to improve quality in Scalable High efficiency Video Coding (SHVC). In order to compensate for phase offsets introduced by, downsampling an appropriate phase offset adjustment is made for upsampling in SHVC with an appropriate offset included for proper luma/chroma color space positions. In one approach the luma/chroma phase offset is specified and a filter is selected to apply the appropriate phase change.
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公开(公告)号：US20220279195A1
公开(公告)日：2022-09-01
申请号：US17747337
申请日：2022-05-18
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 PQ ( 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：US20220272366A1
公开(公告)日：2022-08-25
申请号：US17740220
申请日：2022-05-09
发明人： Koohyar Minoo , Ajay K. Luthra , David M. Baylon
IPC分类号： H04N19/36 , H04N19/187 , H04N19/46 , H04N19/127 , H04N19/30 , H04N19/147 , H04N19/33 , H04N19/34 , H04N19/80
摘要： A Scalable Video Coding (SVC) process is provided for scalable video coding that takes into account color gamut primaries along with spatial resolution. The process provides for re-sampling using video color data obtained from an encoder or decoder process of a base layer (BL) in a multi-layer system to enable improved encoding and decoding in an enhancement layer (EL) or higher layers taking into account color conversion between layers. Examples of applicable SVC include MPEG-4 Advanced Video Coding (AVC) and High Efficiency Video Coding (HEVC). With the SVC process, video data expressed in one color gamut space can be used for prediction in encoding with a possibly different color space, and accommodation for different spatial resolution and bit-depth can be made as well.
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公开(公告)号：US11375215B2
公开(公告)日：2022-06-28
申请号：US16855823
申请日：2020-04-22
发明人： Koohyar Minoo , David M. Baylon , Ajay Luthra
IPC分类号： H04N19/33 , H04N19/187 , H04N19/59 , H04N19/593 , H04N19/182 , H04N19/70 , H04N19/80
摘要： A process for determining the selection of filters and input samples is provided for scalable video coding. The process provides for re-sampling using video data obtained from an encoder or decoder process of a base layer (BL) in a multi-layer system to improve quality in Scalable High Efficiency Video Coding (SHVC). It is proposed that a single scaled reference layer offset be derived from two scaled reference layer offset parameters, and vice-versa. It is also proposed that a single scaled reference layer offset or a single reference layer offset be derived from a combination of a scaled reference layer offset parameter and a reference layer offset parameter.
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公开(公告)号：US11375193B2
公开(公告)日：2022-06-28
申请号：US17014035
申请日：2020-09-08
发明人： Koohyar Minoo , Zhouye Gu , David M. Baylon , Ajay Luthra
IPC分类号： H04N19/124 , H04N19/46 , H04N19/117 , H04N19/136 , H04N19/36 , H04N19/172 , H04N19/182 , H04N19/186 , 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：US20210314570A1
公开(公告)日：2021-10-07
申请号：US17347210
申请日：2021-06-14
发明人： David M. Baylon , Zhouye Gu , Ajay Luthra , Koohyar Minoo , Yue Yu
IPC分类号： H04N19/124 , H04N19/186 , H04N19/44 , G06T5/00 , H04N19/98 , H04N19/70 , H04N19/174 , H04N19/177
摘要： A system and method for regenerating high dynamic range (HDR) video data from encoded video data, extracts, from the encoded video data, a self-referential metadata structure specifying a video data reshaping transfer function. The video data reshaping transfer function is regenerated using data from the metadata structure and the extracted reshaping transfer function is used to generate the HDR video data by applying decoded video data values to the reshaping transfer function.
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公开(公告)号：US10958902B2
公开(公告)日：2021-03-23
申请号：US16726706
申请日：2019-12-24
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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