公开(公告)号：US20240064326A1

公开(公告)日：2024-02-22

申请号：US18497312

申请日：2023-10-30

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Kemal UGUR ,  Jani LAINEMA ,  Antti HALLAPURO

IPC: H04N19/50 ,  H04N19/42 ,  H04N19/523 ,  H04N19/577 ,  H04N19/105

CPC classification number: H04N19/50 ,  H04N19/42 ,  H04N19/523 ,  H04N19/577 ,  H04N19/105 ,  H04N19/176

Abstract: Apparatuses, methods and computer programs are provided for utilizing motion prediction in video coding. A block of pixels of a video representation encoded in a bitstream is read, and a type of the block is determined. If the determining indicates that the block is a block predicted by using two or more reference blocks, a first reference pixel location in a first reference block is determined and a second reference pixel location in a second reference block is determined. The first reference pixel location is used to obtain a first prediction. The first prediction has a second precision, which is higher than the first precision. The second reference pixel location is used to obtain a second prediction, which also has the second precision. The first prediction and the second prediction are combined to obtain a combined prediction; and the precision of the combined prediction is reduced to the first precision.

公开(公告)号：US20240056595A1

公开(公告)日：2024-02-15

申请号：US18492501

申请日：2023-10-23

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Miska Matias HANNUKSELA ,  Kemal UGUR

IPC: H04N19/463 ,  H04N19/70 ,  H04N19/30 ,  H04N19/61

CPC classification number: H04N19/463 ,  H04N19/70 ,  H04N19/30 ,  H04N19/61

Abstract: A method comprising encoding a bitstream comprising a base layer, a first enhancement layer and a second enhancement layer; encoding an indication of both the base layer and the first enhancement layer used for prediction for the second enhancement layer in the bitstream; encoding, in the bitstream, an indication of a first set of prediction types that is applicable from the base layer to the second enhancement layer, wherein the first set of prediction types is a subset of all prediction types available for prediction between layers, and encoding, in the bitstream, an indication of a second set of prediction types that is applicable from the base layer or the first enhancement layer to the second enhancement layer, wherein the second set of prediction types is a subset of all prediction types available for prediction between layers.

公开(公告)号：US20200154130A1

公开(公告)日：2020-05-14

申请号：US16741166

申请日：2020-01-13

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Antti Olli HALLAPURO ,  Kemal UGUR ,  Jani LAINEMA

IPC: H04N19/513 ,  H04N19/573 ,  H04N19/593 ,  H04N19/52

Abstract: A system and method for improving the coding efficiency of motion vector information in video coding. According to various embodiments, a list of motion vector predictor candidates is arranged according to predefined rules. Each motion vector also has a reference index associated with it. One of the motion vector candidates is then selected as a predictor based on predefined rules, or the selection is explicitly signaled in the bitstream. The reference index associated with the selected motion vector is used as a reference index for the current block. The reference index is predicted along with the motion vector. Such embodiments can improve the compression efficiency of modern video codecs.

公开(公告)号：US20190215530A1

公开(公告)日：2019-07-11

申请号：US16356733

申请日：2019-03-18

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Mehmet Oguz BICI ,  Jani LAINEMA ,  Kemal UGUR

IPC: H04N19/513 ,  H04N19/52

CPC classification number: H04N19/521 ,  H04N19/176 ,  H04N19/182 ,  H04N19/52

Abstract: The invention relates to a method for encoding, a method for decoding, an apparatus, computer program products, an encoder and a decoder for video information. The motion vector for a block in a video image is predicted from a set of motion vector prediction candidates determined based on previously-coded motion vectors. A motion vector prediction candidate is included in the set based on the location of the block associated with the first spatial motion vector prediction candidate and in comparison with motion vector prediction candidates already in the set.

公开(公告)号：US20170347117A1

公开(公告)日：2017-11-30

申请号：US15681725

申请日：2017-08-21

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Mehmet Oguz BICI ,  Jani LAINEMA ,  Kemal UGUR

IPC: H04N19/513 ,  H04N19/52 ,  H04N19/176 ,  H04N19/182

CPC classification number: H04N19/521 ,  H04N19/176 ,  H04N19/182 ,  H04N19/52

Abstract: The invention relates to a method for encoding, a method for decoding, an apparatus, computer program products, an encoder and a decoder for video information. The motion vector for a block in a video image is predicted from a set of motion vector prediction candidates determined based on previously-coded motion vectors. A motion vector prediction candidate is included in the set based on the location of the block associated with the first spatial motion vector prediction candidate and in comparison with motion vector prediction candidates already in the set.

公开(公告)号：US20220038733A1

公开(公告)日：2022-02-03

申请号：US17504092

申请日：2021-10-18

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Miska Matias HANNUKSELA ,  Kemal UGUR

IPC: H04N19/463 ,  H04N19/70 ,  H04N19/30 ,  H04N19/61

Abstract: A method comprising encoding a bitstream comprising a base layer, a first enhancement layer and a second enhancement layer; encoding an indication of both the base layer and the first enhancement layer used for prediction for the second enhancement layer in the bitstream; encoding, in the bitstream, an indication of a first set of prediction types that is applicable from the base layer to the second enhancement layer, wherein the first set of prediction types is a subset of all prediction types available for prediction between layers, and encoding, in the bitstream, an indication of a second set of prediction types that is applicable from the base layer or the first enhancement layer to the second enhancement layer, wherein the second set of prediction types is a subset of all prediction types available for prediction between layers.

公开(公告)号：US20200154132A1

公开(公告)日：2020-05-14

申请号：US16741156

申请日：2020-01-13

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Mehmet Oguz BICI ,  Jani LAINEMA ,  Kemal UGUR

IPC: H04N19/513 ,  H04N19/52

Abstract: The invention relates to a method for encoding, a method for decoding, an apparatus, computer program products, an encoder and a decoder for video information. The motion vector for a block in a video image is predicted from a set of motion vector prediction candidates determined based on previously-coded motion vectors. A motion vector prediction candidate is included in the set based on the location of the block associated with the first spatial motion vector prediction candidate and in comparison with motion vector prediction candidates already in the set.

公开(公告)号：US20190200026A1

公开(公告)日：2019-06-27

申请号：US16278596

申请日：2019-02-18

Applicant: Nokia Technologies Oy

Inventor： Jani LAINEMA ,  Kemal UGUR

IPC: H04N19/182 ,  H04N19/107 ,  H04N19/11 ,  H04N19/196 ,  H04N19/105

Abstract: There is disclosed an apparatus, a method and a computer program for video coding. The apparatus comprises a selector configured for selecting a pixel for prediction; a projection definer configured for determining a projection of said pixel to a set of reference pixels; and a prediction definer configured for selecting one or more reference pixels from said set of reference pixels on the basis of said projection, and using said selected one or more reference pixels to obtain a prediction value for said pixel to be predicted.

公开(公告)号：US20180234685A1

公开(公告)日：2018-08-16

申请号：US15951516

申请日：2018-04-12

Applicant: Nokia Technologies Oy

Inventor： Jani LAINEMA ,  Kemal UGUR

IPC: H04N19/182 ,  H04N19/107 ,  H04N19/196 ,  H04N19/11 ,  H04N19/105

CPC classification number: H04N19/182 ,  H04N19/105 ,  H04N19/107 ,  H04N19/11 ,  H04N19/196 ,  H04N19/197

Abstract: There is disclosed an apparatus, a method and a computer program for video coding. The apparatus comprises a selector configured for selecting a pixel for prediction; a projection definer configured for determining a projection of said pixel to a set of reference pixels; and a prediction definer configured for selecting one or more reference pixels from said set of reference pixels on the basis of said projection, and using said selected one or more reference pixels to obtain a prediction value for said pixel to be predicted.

公开(公告)号：US20170223373A1

公开(公告)日：2017-08-03

申请号：US15490469

申请日：2017-04-18

Applicant: Nokia Technologies Oy

Inventor： Kemal UGUR ,  Jani LAINEMA ,  Antti HALLAPURO

IPC: H04N19/50 ,  H04N19/105

CPC classification number: H04N19/50 ,  H04N19/105 ,  H04N19/176 ,  H04N19/182 ,  H04N19/184 ,  H04N19/42 ,  H04N19/523 ,  H04N19/577

Abstract: There is disclosed apparatuses, methods and computer programs for utilizing motion prediction in video coding. A block of pixels of a video representation encoded in a bitstream is read, and a type of the block is determined. If the determining indicates that the block is a block predicted by using two or more reference blocks, a first reference pixel location in a first reference block is determined and a second reference pixel location in a second reference block is determined. The first reference pixel location is used to obtain a first prediction. Said first prediction has a second precision, which is higher than the first precision. The second reference pixel location is used to obtain a second prediction, which also has the second precision. The first prediction and the second prediction are combined to obtain a combined prediction; and the precision of the combined prediction is reduced to the first precision.