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公开(公告)号：US12075093B2
公开(公告)日：2024-08-27
申请号：US17951792
申请日：2022-09-23
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Hye-Yeon Cheong , David William Singer , Dominik Mehlem
IPC: H04N19/66 , H04N19/147 , H04N19/176 , H04N19/19 , H04N19/61 , G06T7/11 , G06T7/12
CPC classification number: H04N19/66 , H04N19/147 , H04N19/176 , H04N19/19 , H04N19/61 , G06T7/11 , G06T7/12
Abstract: A system comprises an encoder configured to compress media objects using a compression loop that includes a residual decomposition component that decomposes a residual signal for a block of the media object being compressed into multiple sub-error signals. The encoder is further configured to enable different transformation and/or quantization processes to be specified to be applied to different ones of the sub-errors. A corresponding decoder is configured to apply inverse transformation/quantization processing to the sub-error signals, based on the transformation/quantization processes that were applied at the encoder. The decoder then re-creates a residual signal from the processed sub-error signals and uses the re-created residual signal to correct predicted values at the decoder.
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公开(公告)号：US11962791B2
公开(公告)日：2024-04-16
申请号：US17531386
申请日：2021-11-19
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Young-o Park , Il-koo Kim , Chan-yul Kim , Kwang-pyo Choi
IPC: H04N19/19 , H04N19/196 , H04N19/463 , H04N19/58
CPC classification number: H04N19/19 , H04N19/196 , H04N19/463 , H04N19/58
Abstract: Provided are an inter prediction method and a motion compensation method. The inter prediction method includes: performing inter prediction on a current image by using a long-term reference image stored in a decoded picture buffer; determining residual data and a motion vector of the current image generated via the inter prediction; and determining least significant bit (LSB) information as a long-term reference index indicating the long-term reference image by dividing picture order count (POC) information of the long-term reference image into most significant bit (MSB) information and the LSB information.
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公开(公告)号：US20230009225A1
公开(公告)日：2023-01-12
申请号：US17951792
申请日：2022-09-23
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Hye-Yeon Cheong , David William Singer , Dominik Mehlem
IPC: H04N19/66 , H04N19/61 , H04N19/176 , H04N19/19 , H04N19/147
Abstract: A system comprises an encoder configured to compress media objects using a compression loop that includes a residual decomposition component that decomposes a residual signal for a block of the media object being compressed into multiple sub-error signals. The encoder is further configured to enable different transformation and/or quantization processes to be specified to be applied to different ones of the sub-errors. A corresponding decoder is configured to apply inverse transformation/quantization processing to the sub-error signals, based on the transformation/quantization processes that were applied at the encoder. The decoder then re-creates a residual signal from the processed sub-error signals and uses the re-created residual signal to correct predicted values at the decoder.
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公开(公告)号：US20230006692A1
公开(公告)日：2023-01-05
申请号：US17941318
申请日：2022-09-09
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yoo Jin CHOI , Mostafa El-Khamy , Jungwon Lee
Abstract: A method and apparatus for variable rate compression with a conditional autoencoder is herein provided. According to one embodiment, a method for compression includes receiving a first image and a first scheme as inputs for an autoencoder network; determining a first Lagrange multiplier based on the first scheme; and using the first image and the first Lagrange multiplier as inputs, computing a second image from the autoencoder network. The autoencoder network is trained using a plurality of Lagrange multipliers and a second image as training inputs.
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5.发明申请
公开(公告)号：US20220400263A1
公开(公告)日：2022-12-15
申请号：US17890583
申请日：2022-08-18
Applicant: ORANGE
Inventor： Felix Henry , Mohsen Abdoli
IPC: H04N19/124 , H04N19/11 , H04N19/147 , H04N19/159 , H04N19/176 , H04N19/182 , H04N19/19 , H04N19/593 , H04N19/61
Abstract: A coding method and a decoding method for decoding a coded data stream representative of at least one image that is split into blocks. For at least one current block of the image, an item of information indicating a coding mode of the current block is decoded from the data stream. When the coding mode of the current block corresponds to a first coding mode, the current block is decoded using a first determined quantization step to dequantize, in the transform domain, a prediction residue associated with the current block. When the coding mode of the current block corresponds to a second coding mode, the current block is decoded using a second determined quantization step to dequantize, in the spatial domain, a prediction residue associated with the current block. The first quantization step and the second quantization step are determined according to the same quantization parameter.
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6.发明授权
公开(公告)号：US11457213B2
公开(公告)日：2022-09-27
申请号：US17255072
申请日：2019-06-18
Applicant: ORANGE
Inventor： Felix Henry , Mohsen Abdoli
IPC: H04N19/124 , H04N19/11 , H04N19/147 , H04N19/159 , H04N19/176 , H04N19/182 , H04N19/19 , H04N19/593 , H04N19/61
Abstract: A coding method and a decoding method for decoding a coded data stream representative of at least one image that is split into blocks. For at least one current block of the image, an item of information indicating a coding mode of the current block is decoded from the data stream. When the coding mode of the current block corresponds to a first coding mode, the current block is decoded using a first determined quantization step to dequantize, in the transform domain, a prediction residue associated with the current block. When the coding mode of the current block corresponds to a second coding mode, the current block is decoded using a second determined quantization step to dequantize, in the spatial domain, a prediction residue associated with the current block. The first quantization step and the second quantization step are determined according to the same quantization parameter.
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公开(公告)号：US11310498B2
公开(公告)日：2022-04-19
申请号：US17086591
申请日：2020-11-02
Applicant: GOOGLE LLC
Inventor： Claudionor Coelho , Aki Kuusela , Shan Li , Dake He
IPC: H04N19/119 , H04N19/19 , H04N19/147 , H04N19/176
Abstract: An apparatus for encoding a block of a picture includes a convolutional neural network (CNN) for determining a block partitioning of the block, the block having an N×N size and a smallest partition determined by the CNN being of size S×S. The CNN includes feature extraction layers; a concatenation layer that receives, from the feature extraction layers, first feature maps of the block, where each first feature map of the first feature maps is of the smallest possible partition size S×S of the block; and at least one classifier that is configured to infer partition decisions for sub-blocks of size (αS)×(αS) of the block, where α is a power of 2.
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公开(公告)号：US20220103832A1
公开(公告)日：2022-03-31
申请号：US17490997
申请日：2021-09-30
Applicant: Comcast Cable Communications, LLC
Inventor： Dan Grois , Alexander Giladi , Yasser Syed , Ali Begen
IPC: H04N19/147 , H04N19/19 , H04N19/132 , H04N19/172
Abstract: An encoder (e.g., a Versatile Video Coding (VVC) encoder, etc.) may make real-time encoding decisions to vary a bitrate of a content item (e.g., high-resolution video, streaming content, a movie, a show/program, etc.) by upsampling and/or downsampling portions (e.g., frames/slices, group of pictures (GOP), coding units (CU), coding tree units (CTU), etc.) based on a cost function that utilizes a versatile Lagrangian multiplier (denoted as A) to denote the versatility). The versatile Lagrangian multiplier may not only account for the effects of quantization (e.g., a quantization parameter (QP), etc.) on portions of the content item, instead, the versatile Lagrangian multiplier may also be based on adjustment parameters associated with content resolution and/or playback quality of experience (QoE). The versatile Lagrangian multiplier enables a substantial decrease in transmission bitrate for portions of a content item without reducing the visual presentation quality and keeping an end-user quality of experience (QoE) at an optimal level.
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公开(公告)号：US11206414B2
公开(公告)日：2021-12-21
申请号：US17061149
申请日：2020-10-01
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Young-o Park , Il-koo Kim , Chan-yul Kim , Kwang-pyo Choi
IPC: H04N19/19 , H04N19/196 , H04N19/463 , H04N19/58
Abstract: Provided are an inter prediction method and a motion compensation method. The inter prediction method includes: performing inter prediction on a current image by using a long-term reference image stored in a decoded picture buffer; determining residual data and a motion vector of the current image generated via the inter prediction; and determining least significant bit (LSB) information as a long-term reference index indicating the long-term reference image by dividing picture order count (POC) information of the long-term reference image into most significant bit (MSB) information and the LSB information.
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公开(公告)号：US11202083B2
公开(公告)日：2021-12-14
申请号：US15736261
申请日：2016-06-20
Applicant: GURULOGIC MICROSYSTEMS OY
Inventor： Ossi Kalevo , Tuomas Karkkainen
IPC: H04N19/186 , H04N19/176 , H04N19/147 , H04N19/196 , H04N19/105 , G06T9/00 , H04N19/593 , H04N19/19
Abstract: A method of encoding input data to generate corresponding encoded data is provided. The method includes encoding the input data into a plurality of symbols in the encoded data, wherein the plurality of symbols represent data as defined by a plurality of palettes indicated and/or included in the encoded data. The method further includes determining mutually different palettes to be used for encoding mutually different parts of the input data, and using the mutually different palettes for encoding the mutually different parts of the input data. Moreover, the method also includes including, within the encoded data, information associating the mutually different palettes with their respective parts of the input data encoded into the encoded data, wherein the information includes palette selection indices for referencing the mutually different palettes on a block-by-block basis.
