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公开(公告)号：US20210350828A1
公开(公告)日：2021-11-11
申请号：US17207415
申请日：2021-03-19
Applicant: Apple Inc.
Inventor： Krasimir D. Kolarov , Steven E. Saunders
IPC: G11B27/031 , H04N17/00 , H04N19/426 , G06K9/00 , G06K9/52 , G06K9/62 , G06T5/00 , G06T7/00
Abstract: Devices and methods for determining image quality using full-reference and non-reference techniques. Full reference image quality may be determined prior to output of an image or video frame from an image sensor processor by temporarily retaining image data from the image sensor and comparing processed image data of the image to the retained, non-processed image data of the same image. Full reference image quality determination may be assisted by a heuristic-based fault indicator. Image quality may also be determined by a non-reference technique of matching the image to one of various scenarios that are associated with sets of heuristics and applying the heuristics of the particular scenario to the image. Instead of relying on a nominal frame rate, video timing quality may be determined by comparing the capture time interval between successive video frames to the presentation time interval of the same video frames.
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公开(公告)号：US10957358B2
公开(公告)日：2021-03-23
申请号：US16252425
申请日：2019-01-18
Applicant: Apple Inc.
Inventor： Krasimir D. Kolarov , Steven E. Saunders
IPC: G11B27/031 , H04N17/00 , H04N19/426 , G06K9/00 , G06K9/52 , G06K9/62 , G06T5/00 , G06T7/00
Abstract: Devices and methods for determining image quality using full-reference and non-reference techniques. Full reference image quality may be determined prior to output of an image or video frame from an image sensor processor by temporarily retaining image data from the image sensor and comparing processed image data of the image to the retained, non-processed image data of the same image. Full reference image quality determination may be assisted by a heuristic-based fault indicator. Image quality may also be determined by a non-reference technique of matching the image to one of various scenarios that are associated with sets of heuristics and applying the heuristics of the particular scenario to the image. Instead of relying on a nominal frame rate, video timing quality may be determined by comparing the capture time interval between successive video frames to the presentation time interval of the same video frames.
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公开(公告)号：US10602398B2
公开(公告)日：2020-03-24
申请号：US16119900
申请日：2018-08-31
Applicant: Apple Inc.
Inventor： Steven E. Saunders , Alexandros Tourapis , Krasimir Kolarov
Abstract: A method includes sampling a common signal over a plurality of iterations, concatenating the sampled iterations, summing samples of the concatenated iterations within a window of a predetermined sample width, at each of a plurality of window positions along the concatenated iterations, and estimating noise of the common signal from the summed sample values at the window positions.
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公开(公告)号：US10593295B2
公开(公告)日：2020-03-17
申请号：US14673824
申请日：2015-03-30
Applicant: Apple Inc.
Inventor： Krasimir D. Kolarov , Steven E. Saunders
IPC: H04N17/00 , H04N19/154 , G09G5/14 , H04N5/265 , G06F3/0484
Abstract: A video quality comparison tool provides for direct visual perceptual comparison of video sequences. Two inputs are presented at the same position and size, with no-look user choice of which to see and easy back-and-forth comparison while the videos are playing, single-stepping, or paused.
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公开(公告)号：US10264269B2
公开(公告)日：2019-04-16
申请号：US14687316
申请日：2015-04-15
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , David W. Singer , Krasimir D. Kolarov , Steven E. Saunders , Guy Cote , Sorin Cismas
IPC: H04N19/12 , H04N19/44 , H04N19/46 , H04N19/105 , H04N19/147 , H04N19/154 , H04N19/156 , H04N19/172 , H04N19/196
Abstract: In a coding system, an encoder codes video data according to a predetermined protocol, which, when decoded causes an associated decoder to perform a predetermined sequence of decoding operations. The encoder may perform local decodes of the coded video data, both in the manner dictated by the coding protocol that is at work and also by one or more alternative decoding operations. The encoder may estimate relative performance of the alternative decoding operations as compared to a decoding operation that is mandated by the coding protocol. The encoder may provide identifiers in metadata that is associated with the coded video data to identify such levels of distortion and/or levels of resources conserved. A decoder may refer to such identifiers when determining when to engage alternative decoding operations as may be warranted under resource conservation policies.
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Patent Agency Ranking
公开(公告)号：US08994828B2
公开(公告)日：2015-03-31
申请号：US13780686
申请日：2013-02-28
Applicant: Apple Inc.
Inventor： Krasimir D. Kolarov , Steven E. Saunders
CPC classification number: G09G5/14 , G06F3/04845 , G06F2203/04803 , H04N5/265 , H04N17/00 , H04N17/004 , H04N19/154
Abstract: A video quality comparison tool provides for direct visual perceptual comparison of video sequences. Two inputs are presented at the same position and size, with no-look user choice of which to see and easy back-and-forth comparison while the videos are playing, single-stepping, or paused.
Abstract translation: 视频质量比较工具提供视频序列的直观视觉感知比较。 两个输入以相同的位置和大小呈现，在视频播放，单步或暂停时，无需查看用户选择和容易的前后比较。
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公开(公告)号：US20140240516A1
公开(公告)日：2014-08-28
申请号：US13780686
申请日：2013-02-28
Applicant: APPLE INC.
Inventor： Krasimir D. Kolarov , Steven E. Saunders
CPC classification number: G09G5/14 , G06F3/04845 , G06F2203/04803 , H04N5/265 , H04N17/00 , H04N17/004 , H04N19/154
Abstract: A video quality comparison tool provides for direct visual perceptual comparison of video sequences. Two inputs are presented at the same position and size, with no-look user choice of which to see and easy back-and-forth comparison while the videos are playing, single-stepping, or paused.
Abstract translation: 视频质量比较工具提供视频序列的直观视觉感知比较。 两个输入以相同的位置和大小呈现，在视频播放，单步或暂停时，无需查看用户选择和容易的前后比较。
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公开(公告)号：US11968383B2
公开(公告)日：2024-04-23
申请号：US17491944
申请日：2021-10-01
Applicant: Apple Inc.
Inventor： Zeina Sinno , Steven E. Saunders
IPC: H04N19/46 , H04N17/00 , H04N19/154 , H04N19/176
CPC classification number: H04N19/46 , H04N17/00 , H04N19/154 , H04N19/176
Abstract: Techniques are presented for inserting markers into a video stream. For each frame of an encoded video stream, disclosed techniques may determine a structure of macroblocks from a code of the frame, and then, select macroblocks to be replaced from the determined structure of macroblocks. Inserting a marker into a frame may be carried out by replacing codes of the selected macro blocks with a code of a marker that identifies the frame. Marking frames of the video stream may facilitate finding correspondence between frames from the video stream before transmission over a channel and the video stream received from the channel, based on the inserted markers. Knowledge of frame correspondence may enable a video quality metric estimation based on a comparison between the found corresponding frames.
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公开(公告)号：US11423942B2
公开(公告)日：2022-08-23
申请号：US17207415
申请日：2021-03-19
Applicant: Apple Inc.
Inventor： Krasimir D. Kolarov , Steven E. Saunders
IPC: G11B27/031 , H04N17/00 , G06V10/42 , G06V10/75 , G06V20/40 , H04N19/426 , G06T5/00 , G06T7/00
Abstract: Devices and methods for determining image quality using full-reference and non-reference techniques. Full reference image quality may be determined prior to output of an image or video frame from an image sensor processor by temporarily retaining image data from the image sensor and comparing processed image data of the image to the retained, non-processed image data of the same image. Full reference image quality determination may be assisted by a heuristic-based fault indicator. Image quality may also be determined by a non-reference technique of matching the image to one of various scenarios that are associated with sets of heuristics and applying the heuristics of the particular scenario to the image. Instead of relying on a nominal frame rate, video timing quality may be determined by comparing the capture time interval between successive video frames to the presentation time interval of the same video frames.
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公开(公告)号：US10070342B2
公开(公告)日：2018-09-04
申请号：US15186138
申请日：2016-06-17
Applicant: Apple Inc.
Inventor： Steven E. Saunders , Alexandros Michael Tourapis , Krasimir Kolarov
Abstract: A method includes sampling a common signal over a plurality of iterations, concatenating the sampled iterations, summing samples of the concatenated iterations within a window of a predetermined sample width, at each of a plurality of window positions along the concatenated iterations, and estimating noise of the common signal from the summed sample values at the window positions.
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