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1. 发明申请

WO2023066672A1 VIDEO CODING USING PARALLEL UNITS 审中-公开
公开(公告)号：WO2023066672A1
公开(公告)日：2023-04-27
申请号：PCT/EP2022/077796
申请日：2022-10-06
申请人： NOKIA TECHNOLOGIES OY
发明人： LAINEMA, Jani , GHAZNAVI YOUVALARI, Ramin , AMINLOU, Alireza , ASTOLA, Pekka , ZARE, Alireza , HANNUKSELA, Miska Matias , HONG, Seungwook , WANG, Limin , PANUSOPONE, Krit
IPC分类号： H04N19/436 , H04N19/59 , H04N19/593 , H04N19/523
摘要： An apparatus includes circuitry configured to: determine a block of samples in a picture; determine a parallel unit the block belongs to; determine at least one row of reference samples not belonging to the parallel unit, wherein the row is not dependent from decoded samples of any parallel unit within the picture; determine a location of at least one reference sample; and in response to the location of the at least one reference sample belonging to the parallel unit the block of samples belongs to, determine a value for the reference sample from decoded samples of the parallel unit the block of samples belongs to; or in response to the location of the reference sample being at a location not belonging to the parallel unit, determine a value for the reference sample from the row of reference samples coded independently from reconstructed samples of any parallel unit within the picture.

2. 发明申请

WO2023281158A1 AN APPARATUS, A METHOD AND A COMPUTER PROGRAM FOR CROSS-COMPONENT PARAMETER CALCULATION 审中-公开
公开(公告)号：WO2023281158A1
公开(公告)日：2023-01-12
申请号：PCT/FI2022/050452
申请日：2022-06-22
申请人： NOKIA TECHNOLOGIES OY
发明人： LAINEMA, Jani
IPC分类号： H04N19/186 , H04N19/176 , H04N19/593 , H04N19/11 , G06T9/00
摘要： A method comprising: calculating at least two parameters (a, b) that define a mapping from a first color component (Y) to a second color component (Cb/Cr), the at least two parameters (a, b) including at least a slope parameter (a) and an offset parameter (b); determining an update term (u) to the slope parameter (a); applying the update term (u) to the slope parameter (a) by adding the update term (u) to the value of the slope parameter (a) to generate an updated slope parameter (a); determining a reference value (yr) of first color component (Y); and calculating an updated offset parameter (b) based on the reference value (yr) of the first color component (Y) and the updated slope parameter (a')-

3. 发明申请

WO2021197860A1 DC DOWN-SCALED WEIGHTED COST FUNCTION FOR IMAGE/VIDEO CODING 审中-公开
公开(公告)号：WO2021197860A1
公开(公告)日：2021-10-07
申请号：PCT/EP2021/056943
申请日：2021-03-18
申请人： NOKIA TECHNOLOGIES OY
发明人： LAINEMA, Jani
IPC分类号： H04N19/105 , H04N19/147 , H04N19/154 , H04N19/176 , H04N19/18 , H04N19/547
摘要： A method, apparatus, and computer program product provide for improving parameter selection decisions in hybrid video and image codecs. In the context of a method, the method generates a block of difference samples based on a difference between a first block of samples and a second block of samples. The method also generates a block of transform coefficients by applying a transformation process to the block of difference samples. The method also determines an absolute value for each transform coefficient in the block of transform coefficients and determines a weighted sum value for all absolute values of the transform coefficients within the block of transform coefficients. The method also applies the weighted sum value as a criterion for a selection decision.

4. 发明申请

WO2021052832A1 AN APPARATUS, A METHOD AND A COMPUTER PROGRAM FOR VIDEO CODING AND DECODING 审中-公开
公开(公告)号：WO2021052832A1
公开(公告)日：2021-03-25
申请号：PCT/EP2020/075191
申请日：2020-09-09
申请人： NOKIA TECHNOLOGIES OY
发明人： LAINEMA, Jani
IPC分类号： H04N19/70 , H04N19/12 , H04N19/129
摘要： There is disclosed a method comprising obtaining a block of transform coefficients; searching a position of a last non-zero coefficient in a scan order in the block; selecting a secondary transform mode based on the position and encoding first syntax elements indicative of the selected secondary transform mode. A primary transform mode is selected based on the secondary transform mode. Second syntax elements indicative of the selected primary transform mode and third syntax elements defining the transform coefficients within the block are encoded. There is also disclosed a method comprising receiving encoded information related to a block of transform coefficients; decoding an indication of a position of a last non-zero coefficient in a scan order in the block and using the position to determine if an indication of a secondary transform mode is present in the bit stream. If so, first syntax elements indicative of the secondary transform mode are decoded and used to determine if an indication of a primary transform mode is present in the bit stream. If so, second syntax elements indicative of the primary transform mode are decoded. The transform coefficients are decoded and the determined transform modes are applied to select transforms and the transforms, if any, are applied to the transform coefficients.

5. 发明申请

WO2020115355A1 AN APPARATUS, A METHOD AND A COMPUTER PROGRAM FOR VIDEO CODING AND DECODING 审中-公开
公开(公告)号：WO2020115355A1
公开(公告)日：2020-06-11
申请号：PCT/FI2019/050798
申请日：2019-11-08
申请人： NOKIA TECHNOLOGIES OY
发明人： LAINEMA, Jani
IPC分类号： H04N19/523 , H04N19/51 , H04N19/59 , H04N19/80 , H04N19/176 , H04N19/117 , H04N19/577
摘要： A method for motion compensated prediction, the method comprising determining a motion vector for a block of samples;determining a sub-sample accurate horizontal component and a sub-sample accurate vertical component of said motion vector;determining fractional parts of said sub-sample accurate horizontal and vertical motion vector components;determining interpolation filter length and interpolation filter based on said fractional parts; applying said interpolation filter with determined length to perform a filtering operation at least in either horizontal or vertical direction; and storing the result of said filtering operation as the motion compensated prediction with said motion vector.

6. 发明申请

WO2019211522A2 AN APPARATUS, A METHOD AND A COMPUTER PROGRAM FOR VIDEO CODING AND DECODING 审中-公开
公开(公告)号：WO2019211522A2
公开(公告)日：2019-11-07
申请号：PCT/FI2019/050341
申请日：2019-04-29
申请人： NOKIA TECHNOLOGIES OY
发明人： LAINEMA, Jani
摘要： There are disclosed various methods, apparatuses and computer program products for video encoding and decoding. In some embodiments motion vectors are determined for at least first prediction block and second prediction block. A motion compensated prediction is performed for at least said first prediction block. A motion vector difference between the motion vectors of said first prediction block and said second prediction block in a first direction is determined and a resampling offset is calculated based on said motion vector difference, wherein said at least one sample is on the boundary of one of the motion compensated blocks in said first direction, and said resampling offset has a non-linear dependency on said motion difference value. A resampling process is performed using said resampling offset and at least one sample of the motion compensated first block or motion compensated second block as input to the resampling process.

7. 发明申请

WO2018172609A3 MOTION COMPENSATION IN VIDEO ENCODING AND DECODING 审中-公开
公开(公告)号：WO2018172609A3
公开(公告)日：2018-09-27
申请号：PCT/FI2018/050193
申请日：2018-03-16
申请人： NOKIA TECHNOLOGIES OY
发明人： LAINEMA, Jani
IPC分类号： H04N19/51 , H04N19/513 , H04N19/557 , H04N19/57 , H04N19/577 , H04N19/56
摘要： There are disclosed various methods, apparatuses, and computer readable storage media for video encoding and decoding. In some embodiments for decoding or encoding, a block (81) of a current picture (80) is obtained. The block (81 ) is split at least into a first line-set and a second line-set, where the splitting direction is a horizontal direction or a vertical direction. A one-dimensional motion vector refinement process for each line-set is performed, where horizontal components or vertical components of motion vectors of the line-set are updated based on the splitting direction. In the one-dimensional motion vector refinement process, a first motion vector predictor candidate (82) pointing to a first reference block (83) in a first reference picture (84) and a second motion vector predictor candidate (85) pointing to a second reference block (86) in a second reference picture (87) are obtained. A difference vector (88) is added to the first motion vector predictor candidate (82) to obtain a modified first motion vector predictor candidate (89) and subtracted from the second motion vector predictor candidate (85) to obtain a modified second motion vector predictor candidate (90). A cost estimate is determined for bi-directional motion prediction on the basis of the modified first motion vector predictor candidate (89) and the modified second motion vector predictor candidate (90). The addition, subtraction and cost estimate determination may be repeated to obtain a set of modified first motion vector predictor candidates, a set of modified second motion vector predictor candidates and a set of cost estimates. A first motion vector predictor is selected from the set of modified first motion vector predictor candidates and a second motion vector predictor is selected from the set of modified second motion vector predictor candidates on the basis of the set of cost estimates.

8. 发明申请

WO2015170243A1 METHOD AND TECHNICAL EQUIPMENT FOR VIDEO ENCODING AND DECODING USING PALETTE CODING 审中-公开
标题翻译：使用PALETTE编码的视频编码和解码的方法和技术设备
公开(公告)号：WO2015170243A1
公开(公告)日：2015-11-12
申请号：PCT/IB2015/053252
申请日：2015-05-04
申请人： NOKIA TECHNOLOGIES OY , NOKIA USA INC.
发明人： LAINEMA, Jani
IPC分类号： H04N19/00 , G06T9/00 , H03M7/00
CPC分类号： H04N19/103 , H04N19/14 , H04N19/186 , H04N19/44 , H04N19/46 , H04N19/593
摘要： The application relates to a method and technical equipment for decoding a coding unit being coded with palette mode, comprising decoding an indication of presence of escape coding within the coding unit; determining the size of the palette based on said indication of presence of escape coding; determining which palette index indicates escape coding for a sample; comparing a decoded palette index to said palette index indicating escape coding and in the case the indexes match, decoding sample value information; and assigning the decoded sample value for a sample within said coding unit. In addition, the application relates to a method and technical equipment for encoding.
摘要翻译：本申请涉及一种用于对通过调色板模式编码的编码单元进行解码的方法和技术设备，包括对编码单元内的转义编码的存在指示进行解码; 基于所述逃避编码的存在的指示来确定调色板的大小; 确定哪个调色板索引指示样品的转义编码; 将解码的调色板索引与指示转义编码的所述调色板索引进行比较，并且在索引匹配的情况下，解码样本值信息; 以及将所解码的样本值分配给所述编码单元内的样本。另外，本申请涉及一种用于编码的方法和技术设备。

9. 发明申请

WO2021064291A1 GUIDING DECODER-SIDE OPTIMIZATION OF NEURAL NETWORK FILTER 审中-公开
公开(公告)号：WO2021064291A1
公开(公告)日：2021-04-08
申请号：PCT/FI2020/050646
申请日：2020-10-01
申请人： NOKIA TECHNOLOGIES OY
发明人： CRICRI, Francesco , LAM, Yat Hong , ZARE, Alireza , HANNUKSELA, Miska , LAINEMA, Jani
IPC分类号： H04N19/117 , H04N19/177 , H04N19/192 , G06N3/08 , H04N19/124 , H04N19/82 , H04N19/503 , G06N20/00 , G06T5/00
摘要： Optimization of a neural network (730, 1122), for example in a video codec at the decoder (1120) side, may be guided to limit overfitting. The encoder (1110) may encode video(s) with different qualities for different frames in the video. Low-quality frames (POC16, POC16_LQ, 720, 1142) may be used as both input and ground-truth during optimization. High-quality frames (POC0, POC0_HQ, 760, 1145) may be used to optimize the neural network so that higher-quality versions (POC0_pred, POC16_pred, 740, 750, 1143, 1144) of lower-quality inputs may be predicted. The neural network may be trained to make such predictions by making a prediction based on a constructed low-quality input (POC0_LQ, 710, 1141, POC16_LLQ) for which the corresponding high-quality version is known, comparing the prediction to the high-quality version, and fine-tuning the neural network to improve its ability to predict a high-quality version of a low-quality input. To limit overfitting, the neural network may be concurrently or in an alternating fashion trained with low-quality input for which a higher-quality version of the low- quality input is known.

10. 发明申请

WO2019211522A3 AN APPARATUS, A METHOD AND A COMPUTER PROGRAM FOR VIDEO CODING AND DECODING 审中-公开
公开(公告)号：WO2019211522A3
公开(公告)日：2019-11-07
申请号：PCT/FI2019/050341
申请日：2019-04-29
申请人： NOKIA TECHNOLOGIES OY
发明人： LAINEMA, Jani
IPC分类号： H04N19/139 , H04N19/513 , H04N19/55 , H04N19/86 , H04N19/117 , G06T3/00
摘要： There are disclosed various methods, apparatuses and computer program products for video encoding and decoding. In some embodiments motion vectors are determined for at least first prediction block and second prediction block. A motion compensated prediction is performed for at least said first prediction block. A motion vector difference between the motion vectors of said first prediction block and said second prediction block in a first direction is determined and a resampling offset is calculated based on said motion vector difference, wherein said at least one sample is on the boundary of one of the motion compensated blocks in said first direction, and said resampling offset has a non-linear dependency on said motion difference value. A resampling process is performed using said resampling offset and at least one sample of the motion compensated first block or motion compensated second block as input to the resampling process.

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