公开(公告)号：US20250056017A1

公开(公告)日：2025-02-13

申请号：US18710679

申请日：2022-11-09

Applicant: Nokia Technologies Oy

Inventor： Ramin GHAZNAVI YOUVALARI ,  Pekka ASTOLA ,  Jani LAINEMA ,  Alireza AMINLOU

IPC: H04N19/176 ,  G06T7/40 ,  H04N19/147 ,  H04N19/186 ,  H04N19/70

Abstract: A method comprising: obtaining an image block unit comprising samples in color channels of one or two chrominance channels and one luminance channel: reconstructing samples of said luminance channel of the image block unit: determining parameters for at least one prediction model for predicting samples of at least one color channel of the image block unit using a prediction model based on one or more reference samples in a neighboring block in current channel/frame, one or more reference samples in a block neighboring a co-located block in a reference channel/frame; and one or more reference samples inside the co-located block in the reference channel/frame; and determining said at least one prediction model as a polynomial and/or exponential prediction model.

公开(公告)号：US20220014733A1

公开(公告)日：2022-01-13

申请号：US17483243

申请日：2021-09-23

Applicant: Nokia Technologies Oy

Inventor： Miska HANNUKSELA ,  Alireza AMINLOU

IPC: H04N19/105 ,  H04N19/174 ,  H04N19/33 ,  H04N19/39 ,  H04N19/55 ,  H04N19/597 ,  H04N13/161

Abstract: A method comprising: encoding an input picture into a coded constituent picture;
reconstructing, as a part of said encoding, a decoded constituent picture corresponding to the coded constituent picture; encoding a spatial region into a coded tile, the encoding comprising: determining a horizontal offset and a vertical offset indicative of a region-wise anchor position of the spatial region within the decoded constituent picture; encoding the horizontal offset and the vertical offset; determining that a prediction unit at position of a first horizontal coordinate and a first vertical coordinate of the coded tile is predicted relative to the region-wise anchor position, wherein the first horizontal coordinate and the first vertical coordinate are horizontal and vertical coordinates, respectively, within the spatial region; indicating that the prediction unit is predicted relative to a prediction-unit anchor position that is relative to the horizontal and vertical offset; deriving a prediction-unit anchor position equal to sum of the first horizontal coordinate and the horizontal offset, and the first vertical coordinate and the vertical offset, respectively; and determining a motion vector for the prediction unit; and applying the motion vector relative to the prediction-unit anchor position to obtain a prediction block.

公开(公告)号：US20230345024A1

公开(公告)日：2023-10-26

申请号：US18300073

申请日：2023-04-13

Applicant: Nokia Technologies Oy

Inventor： Miska Matias HANNUKSELA ,  Kashyap KAMMACHI SREEDHAR ,  Alireza AMINLOU

IPC: H04N19/44 ,  H04N19/172 ,  H04N19/159 ,  H04N19/105

CPC classification number: H04N19/44 ,  H04N19/172 ,  H04N19/159 ,  H04N19/105

Abstract: Various embodiments provide example apparatus, method, and computer program product. The example apparatus includes: at least one processor; and at least one non-transitory memory including computer program code; wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to: define a derived image item; and define a single stream item property, wherein the single stream item property is used to indicate that input image items of the derived image item are concatenated in encoded domain to obtain a single stream and are to be decoded by a single decoder.

公开(公告)号：US20220094909A1

公开(公告)日：2022-03-24

申请号：US17419534

申请日：2019-12-16

Applicant: Nokia Technologies Oy

Inventor： Miska HANNUKSELA ,  Alireza AMINLOU

IPC: H04N19/105 ,  H04N19/172 ,  H04N19/597 ,  H04N19/70 ,  H04N19/169 ,  H04N19/174 ,  H04N19/167

Abstract: There is disclosed a method, an apparatus and a computer program product for video encoding and decoding. In accordance with an embodiment the method comprises obtaining coded data of a sub-picture, the sub-picture belonging to a picture, and the sub-picture belonging to a sub-picture sequence and determining whether to use the sub-picture as a source for a manipulated reference sub-picture. If the determining reveals that the sub-picture is to be used as the source for the manipulated reference sub-picture, the manipulated reference sub-picture is generated from the sub-picture to be used as a reference for a subsequent sub-picture of the sub-picture sequence.

公开(公告)号：US20240291981A1

公开(公告)日：2024-08-29

申请号：US18693380

申请日：2022-08-31

Applicant: Nokia Technologies Oy

Inventor： Alireza ZARE ,  Alireza AMINLOU ,  Miska Matias HANNUKSELA

IPC: H04N19/117 ,  H04N19/119 ,  H04N19/174

CPC classification number: H04N19/117 ,  H04N19/119 ,  H04N19/174

Abstract: A method comprising: dividing pictures of one or more input picture sequences into a plurality of subpictures (1000); encoding each of the subpictures into a plurality of subpicture versions having different quality and/or resolution (1002); partitioning the plurality of subpicture versions into one or more subpicture groups (1004); and allocating a range of adaptive loop filter parameter set identifiers coefficients for each of said subpicture groups (1006).

公开(公告)号：US20230319286A1

公开(公告)日：2023-10-05

申请号：US18131432

申请日：2023-04-06

Applicant: Nokia Technologies Oy

Inventor： Miska HANNUKSELA ,  Alireza AMINLOU

IPC: H04N19/137 ,  H04N19/30 ,  H04N19/176

CPC classification number: H04N19/137 ,  H04N19/176 ,  H04N19/30

Abstract: A method comprising: encoding an input picture into a coded picture; reconstructing picture corresponding to the coded picture; encoding a spatial region into a coded tile, the encoding comprising: determining a horizontal offset and a vertical offset indicative of a region-wise anchor position of the spatial region within the decoded picture; encoding the horizontal offset and the vertical offset; determining that a prediction unit at position of a first horizontal coordinate and a first vertical coordinate is predicted relative to the region-wise anchor position; indicating that the prediction unit is predicted relative to a prediction-unit anchor position; deriving a prediction-unit anchor position equal to sum of the first horizontal coordinate and the horizontal offset, and the first vertical coordinate and the vertical offset, respectively; and determining a motion vector for the prediction unit; and applying the motion vector relative to the prediction-unit anchor position to obtain a prediction block.

公开(公告)号：US20250008159A1

公开(公告)日：2025-01-02

申请号：US18346143

申请日：2023-06-30

Applicant: Nokia Technologies Oy

Inventor： Jani LAINEMA ,  Alireza AMINLOU

IPC: H04N19/70 ,  H04N19/169

Abstract: An apparatus configured to: determine to encode or decode a first coding tree unit, wherein a second coding tree unit is at least partially different from the first coding tree unit, wherein the second coding tree unit comprises a previously encoded or decoded coding tree unit; in response to determining to encode or decode the first coding tree unit, determine at least one stored syntax element value based, at least partially, on a location of the first coding tree unit; and update at least one state variable of the apparatus based, at least partially, on the at least one stored syntax element value.

公开(公告)号：US20240357104A1

公开(公告)日：2024-10-24

申请号：US18640520

申请日：2024-04-19

Applicant: Nokia Technologies Oy

Inventor： Honglei ZHANG ,  Francesco CRICRÌ ,  Alireza AMINLOU ,  Miska Matias HANNUKSELA ,  Nam Hai LE ,  Jukka Ilari AHONEN ,  Hamed REZAZADEGAN TAVAKOLI

IPC: H04N19/119 ,  H04N19/167 ,  H04N19/176

CPC classification number: H04N19/119 ,  H04N19/167 ,  H04N19/176

Abstract: Various embodiments describe an apparatus, a method, and a computer program product. An example apparatus includes at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform: encoding an input picture by using a first encoder or first encoding parameters; encoding the input picture by using a second encoder or second encoding parameters; generating a first reconstructed picture based on the encoding of the input picture by using the first encoder or the first encoding parameters; and generating a second reconstructed picture based on the encoding of the input picture by using the second encoder or the second encoding parameters.

公开(公告)号：US20240259597A1

公开(公告)日：2024-08-01

申请号：US18560420

申请日：2022-05-05

Applicant: Nokia Technologies Oy

Inventor： Jani LAINEMA ,  Alireza AMINLOU

IPC: H04N19/60 ,  H04N19/176

CPC classification number: H04N19/60 ,  H04N19/176

Abstract: The embodiments relate to a method and technical equipment for implementing the method. The method comprises receiving a block of input samples; performing at least a first inverse transform on a first set of input samples, resulting in a first set of inverse transformed samples; performing at least a second inverse transform on a second set of input samples, resulting in a second set of inverse transformed samples; determining statistical information related to the first set of inverse transformed samples and for determining statistical information related to the second set of inverse transformed samples; updating the first inverse transform based on the determined statistical information related to the first set of inverse transformed samples; and updating the second inverse transform based on the determined statistical information related to the second set of inverse transformed samples.

公开(公告)号：US20240064311A1

公开(公告)日：2024-02-22

申请号：US18259765

申请日：2021-12-17

Applicant: Nokia Technologies Oy

Inventor： Pekka ASTOLA ,  Alireza AMINLOU ,  Jani LAINEMA

IPC: H04N19/167 ,  H04N19/186 ,  H04N19/59

CPC classification number: H04N19/167 ,  H04N19/186 ,  H04N19/59

Abstract: The embodiments relate to a method comprising obtaining sample values of a target area in a picture to be encoded (310); obtaining sample values of a regressor area in a picture to be encoded (320); determining at least one set of prediction coefficients by means of a linear regression (330); predicting the sample values of the target area using the determined at least one set of prediction coefficients to result in a first predicted sample values (340); determining best performing set of prediction coefficients (350); predicting the sample values of the target area using the best performing set of prediction coefficients (360); encoding an indication indicating the best performing set of prediction coefficients along the bitstream (370), and iterating the steps for all target areas in the picture to be encoded (380). The embodiments also relate to a decoding method, and apparatuses for encoding and decoding.