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1. 发明申请

US20210397874A1 PARALLEL HISTOGRAM CALCULATION WITH APPLICATION TO PALETTE TABLE DERIVATION 有权
公开(公告)号：US20210397874A1
公开(公告)日：2021-12-23
申请号：US17465712
申请日：2021-09-02
申请人： ATI Technologies ULC
发明人： Feng Pan , Wei Gao , Yang Liu , Crystal Yeong-Pian Sau , Haibo Liu , Edward A. Harold , Ying Luo , Ihab Amer , Gabor Sines
IPC分类号： G06K9/46 , G06T5/40 , H04N19/423 , H04N19/186 , G06K9/62
摘要： Systems, apparatuses, and methods for performing parallel histogram calculation with application to palette table derivation are disclosed. An encoder calculates a first histogram for a first portion of pixel component value bits of a block of pixels. Then, the encoder selects a first number of the highest pixel count bins from the first histogram. Also, the encoder calculates a second histogram for a second portion of pixel component value bits of the block. The encoder selects a second number of the highest pixel count bins from the second histogram. A third histogram is calculated from the concatenation of bits assigned to the first and second number of bins, and the highest pixel count bins are selected from the third histogram. A palette table is derived based on these highest pixel count bins selected from the third histogram, and the block of pixels is encoded using the palette table.

2. 发明申请

US20210352282A1 HIERARCHICAL HISTOGRAM CALCULATION WITH APPLICATION TO PALETTE TABLE DERIVATION 有权
公开(公告)号：US20210352282A1
公开(公告)日：2021-11-11
申请号：US17385030
申请日：2021-07-26
申请人： ATI Technologies ULC
发明人： Feng Pan , Wei Gao , Yang Liu , Crystal Yeong-Pian Sau , Haibo Liu , Edward A. Harold , Ying Luo , Ihab Amer , Gabor Sines
IPC分类号： H04N19/115 , H04N19/176 , H04N19/182 , H04N19/186
摘要： Systems, apparatuses, and methods for calculating multi-pass histograms for palette table derivation are disclosed. An encoder calculates a first histogram for a first portion of most significant bits (MSBs) of pixel component values of a block of an image or video frame. Then, the encoder selects a given number of the highest pixel count bins from the first histogram. The encoder then increases the granularity of these selected highest pixel count bins by evaluating one or more additional bits from the pixel component values. A second histogram is calculated for the concatenation of the original first portion MSBs from the highest pixel count bins and the one or more additional bits, and the highest pixel count bins are selected from the second histogram. A palette table is derived based on these highest pixel count bins selected from the second histogram, and the block is encoded using the palette table.

3. 发明申请

US20210097327A1 PARALLEL HISTOGRAM CALCULATION WITH APPLICATION TO PALETTE TABLE DERIVATION 有权
公开(公告)号：US20210097327A1
公开(公告)日：2021-04-01
申请号：US16588810
申请日：2019-09-30
申请人： ATI Technologies ULC
发明人： Feng Pan , Wei Gao , Yang Liu , Crystal Yeong-Pian Sau , Haibo Liu , Edward A. Harold , Ying Luo , Ihab Amer , Gabor Sines
IPC分类号： G06K9/46 , G06T5/40 , G06K9/62 , H04N19/186 , H04N19/423
摘要： Systems, apparatuses, and methods for performing parallel histogram calculation with application to palette table derivation are disclosed. An encoder calculates a first histogram for a first portion of pixel component value bits of a block of pixels. Then, the encoder selects a first number of the highest pixel count bins from the first histogram. Also, the encoder calculates a second histogram for a second portion of pixel component value bits of the block. The encoder selects a second number of the highest pixel count bins from the second histogram. A third histogram is calculated from the concatenation of bits assigned to the first and second number of bins, and the highest pixel count bins are selected from the third histogram. A palette table is derived based on these highest pixel count bins selected from the third histogram, and the block of pixels is encoded using the palette table.

4. 发明申请

US20200382801A1 EFFICIENT PROCESSING OF TRANSLUCENT OBJECTS IN VIDEO KEYING 审中-公开
公开(公告)号：US20200382801A1
公开(公告)日：2020-12-03
申请号：US16428909
申请日：2019-05-31
申请人： ATI Technologies ULC
发明人： Yubao Zheng , Gabor Sines
IPC分类号： H04N19/23 , G06K9/00 , H04N19/186 , G06T7/194
摘要： A video keying processing device is provided which comprises memory configured to store data and a processor configured to determine, which pixel portions, in a YUV color space of a first video comprising a foreground object and a background color, represent the foreground object and the background color of the first video. The processor is also configured to, for each pixel portion of the first video determined to represent the foreground object and the background color, convert YUV values of the pixel portion to red-green-blue (RGB) color component value and determine a blended display value for each RGB color component of the pixel portion based on a blending factor. The processor is also configured to generate a composite video for display using the blended display values of each pixel portion determined to represent the foreground object and the background color.

5. 发明授权

US10334276B2 Method and apparatus for determining the severity of corruption in a picture 有权
公开(公告)号：US10334276B2
公开(公告)日：2019-06-25
申请号：US14981835
申请日：2015-12-28
申请人： ATI TECHNOLOGIES ULC
发明人： Ihab Amer , Gabor Sines , Khaled Mammou , Haibo Liu , Edward Harold , Lei Zhang , Fabio Gulino , Ehsan Mirhadi , Ho Hin Lau
IPC分类号： H04N19/44 , H04N19/65 , H04N21/44 , H04N21/442 , H04N21/6375
摘要： An encoder encodes pixels representative of a picture in a multimedia stream, generates a first approximate signature based on approximate values of pixels in a reconstructed copy of the picture, and transmits the encoded pixels and the first approximate signature. A decoder receives a first packet including the encoded pixels and the first approximate signature, decodes the encoded pixels, and transmits a first signal in response to comparing the first approximate signature and a second approximate signature generated based on approximate values of the decoded pixels. If a corrupted packet is detected, the multimedia application requests an intra-coded picture in response to the first approximate signature differing from the second approximate signature. The second signal instructs the decoder to bypass requesting an intra-coded picture and to continue decoding received packets in response to the first approximate signature being equal to the second approximate signature.

6. 发明申请

US20180084270A1 DYNAMIC RELOAD OF VIDEO ENCODER MOTION ESTIMATION SEARCH WINDOW UNDER PERFORMANCE/POWER CONSTRAINTS 审中-公开
公开(公告)号：US20180084270A1
公开(公告)日：2018-03-22
申请号：US15271055
申请日：2016-09-20
申请人： Advanced Micro Devices, Inc. , ATI Technologies ULC
发明人： Ihab Amer , Gabor Sines , Edward Harold , Jinbo Qiu , Lei Zhang , Yang Liu , Zhen Chen , Ying Luo , Shu-Hsien Wu , Zhong Cai
IPC分类号： H04N19/513 , H04N19/172 , H04N19/105
CPC分类号： H04N19/57 , H04N19/433
摘要： A processing apparatus is provided that includes an encoder configured to encode current frames of video data using previously encoded reference frames and perform motion searches within a search window about each of a plurality of co-located portions of a reference frame. The processing apparatus also includes a processor configured to determine, prior to performing the motion searches, which locations of the reference frame to reload the search window according to a threshold number of search window reloads using predicted motions of portions of the reference frame corresponding to each of the locations. The processor is also configured to cause the encoder to reload the search window at the determined locations of the reference frame and, for each of the remaining locations of the reference frame, slide the search window in a first direction indicated by the location of the next co-located portion of the reference frame.

7. 发明申请

US20160234491A1 METHOD FOR MAXIMIZING VIDEO SLICE SIZE CONSTRAINT 审中-公开
标题翻译：用于最大化视频尺寸约束的方法
公开(公告)号：US20160234491A1
公开(公告)日：2016-08-11
申请号：US14620036
申请日：2015-02-11
申请人： ATI Technologies ULC
发明人： Khaled Mammou , Ihab M.A. Amer , Gabor Sines
IPC分类号： H04N19/105 , H04N19/172 , H04N19/174 , H04N19/126 , H04N19/159
CPC分类号： H04N19/174 , H04N19/119 , H04N19/124 , H04N19/15 , H04N19/156
摘要： A method and apparatus to maximize video slice size is described herein. The method packs as many macroblocks as possible within a capped-size slice, while preserving user-defined quality constraints. The probability to conform to the maximum slice size constraint may be adjusted according to a user-defined parameter. The method may be integrated into a rate control process of a video encoder. The method predicts whether encoding a macroblock with a quantization parameter exceeds a current slice size constraint. It further predicts whether encoding a given number of macroblocks with a given configuration of quantization parameters exceeds the current slice size constraint. The method then proceeds to encode the current macroblock either on a condition that encoding the given number of macroblocks with the given configuration of quantization parameters falls below the size constraint of the current slice or after determining that a new slice is needed.
摘要翻译：本文描述了使视频片段大小最大化的方法和装置。该方法在限幅片段内尽可能多地封装宏块，同时保留用户定义的质量约束。可以根据用户定义的参数来调整符合最大片大小约束的概率。该方法可以被集成到视频编码器的速率控制过程中。该方法预测是否对具有量化参数的宏块进行编码超过当前的片大小约束。它进一步预测用给定的量化参数配置对给定数量的宏块进行编码是否超过当前的片大小约束。该方法然后在编码给定数量的宏块的量化参数的配置下降到低于当前分片的大小约束的条件下或在确定需要新的分片之后继续对当前宏块进行编码。

8. 发明授权

US11553222B2 Low latency wireless virtual reality systems and methods 有权
公开(公告)号：US11553222B2
公开(公告)日：2023-01-10
申请号：US17132304
申请日：2020-12-23
申请人： Advanced Micro Devices, Inc. , ATI Technologies ULC
发明人： Lei Zhang , Gabor Sines , Khaled Mammou , David Glen , Layla A. Mah , Rajabali M. Koduri , Bruce Montag
IPC分类号： G06F15/16 , H04N21/2343 , H04N21/2368 , H04N21/236 , H04N21/414 , H04N21/422 , H04N21/434 , H04N21/437 , H04L69/24 , H04N21/43 , H04L65/70 , H04L65/75 , H04L67/131
摘要： Virtual Reality (VR) processing devices and methods are provided for transmitting user feedback information comprising at least one of user position information and user orientation information, receiving encoded audio-video (A/V) data, which is generated based on the transmitted user feedback information, separating the A/V data into video data and audio data corresponding to a portion of a next frame of a sequence of frames of the video data to be displayed, decoding the portion of a next frame of the video data and the corresponding audio data, providing the audio data for aural presentation and controlling the portion of the next frame of the video data to be displayed in synchronization with the corresponding audio data.

9. 发明授权

US11490090B2 Text and line detection in video encode by using co-sited gradient and variance values 有权
公开(公告)号：US11490090B2
公开(公告)日：2022-11-01
申请号：US17138812
申请日：2020-12-30
申请人： ATI Technologies ULC
发明人： Mehdi Saeedi , Sai Harshita Tupili , Yang Liu , Mingkai Shao , Gabor Sines
IPC分类号： H04N19/136 , H04N19/103 , H04N19/172
摘要： Methods and devices are provided for encoding video. By using co-sited gradient and variance values to detect text and line in frames of the video. A processor is configured to receive a plurality of frames of video, determine, for a portion of a frame, a variance of the portion of the frame and a gradient of the portion of the frame and encode, using one of a plurality of different encoding qualities, the portion of the frame based on the gradient and the variance of the portion of the frame. Encoding is performed at both the sub-frame level and frame level. The portion of the frame is classified into one of a plurality of categories based on the gradient and variance and encoded based on the category.

10. 发明授权

US11039153B2 Efficient processing of translucent objects in video keying 有权
公开(公告)号：US11039153B2
公开(公告)日：2021-06-15
申请号：US16428909
申请日：2019-05-31
申请人： ATI Technologies ULC
发明人： Yubao Zheng , Gabor Sines
IPC分类号： G06T7/00 , H04N19/23 , G06T7/194 , H04N19/186 , G06K9/00
摘要： A video keying processing device is provided which comprises memory configured to store data and a processor configured to determine, which pixel portions, in a YUV color space of a first video comprising a foreground object and a background color, represent the foreground object and the background color of the first video. The processor is also configured to, for each pixel portion of the first video determined to represent the foreground object and the background color, convert YUV values of the pixel portion to red-green-blue (RGB) color component value and determine a blended display value for each RGB color component of the pixel portion based on a blending factor. The processor is also configured to generate a composite video for display using the blended display values of each pixel portion determined to represent the foreground object and the background color.

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