公开(公告)号：WO2020139595A1

公开(公告)日：2020-07-02

申请号：PCT/US2019/066481

申请日：2019-12-16

Applicant: GOPRO, INC.

Inventor： GOUNELLE, Romain

IPC: G06T5/00 ,  H04N5/335

Abstract: An image capture device may detect and repair banding artifacts in a video. The image capture device may include an image sensor and an image processor. The image sensor may capture a frame that includes a sinusoidal light waveform banding artifact. The image processor may detect a sinusoidal light waveform in the frame. The image processor may perform a sinusoidal regression. The image processor may obtain an inverted gain map. The image processor may apply the inverted gain map to the frame. The image processor may output the frame.

公开(公告)号：WO2020123967A2

公开(公告)日：2020-06-18

申请号：PCT/US2019/066267

申请日：2019-12-13

Applicant: APPLE INC.

Inventor： NOORKAMI, Maneli ,  DESAI, Ranjit

IPC: G06F3/01 ,  G06F3/03

Abstract: Systems and methods for gaze-driven recording of video are described. Some implementations may include accessing gaze data captured using one or more gaze-tracking sensors; applying a temporal filter to the gaze data to obtain a smoothed gaze estimate; determining a region of interest based on the smoothed gaze estimate, wherein the region of interest identifies a subset of a field of view; accessing a frame of video; recording a portion of the frame associated with the region of interest as an enhanced frame of video, wherein the portion of the frame corresponds to a smaller field of view than the frame; and storing, transmitting, or displaying the enhanced frame of video.

公开(公告)号：WO2020117412A1

公开(公告)日：2020-06-11

申请号：PCT/US2019/059597

申请日：2019-11-04

Applicant: GOOGLE LLC

Inventor： MUKHERJEE, Debargha ,  JOSHI, Urvang ,  CHEN, Yue ,  PARKER, Sarah

IPC: H04N19/503 ,  H04N19/593 ,  H04N19/61 ,  G06N3/00 ,  G06N3/08 ,  G06T9/00

Abstract: A hybrid apparatus for coding a video stream includes a first encoder. The first encoder includes a neural network having at least one hidden layer, and the neural network receives source data from the video stream at a first hidden layer of the at least one hidden layer, receives side information correlated with the source data at the first hidden layer, and generates guided information using the source data and the side information. The first encoder outputs the guided information and the side information for a decoder to reconstruct the source data.

公开(公告)号：WO2019240832A1

公开(公告)日：2019-12-19

申请号：PCT/US2018/053142

申请日：2018-09-27

Applicant: APPLE INC. ,  EVANS, Neal D. ,  VANDYKE, James W. ,  HULVA, Andrew M. ,  SILFVAST, Robert D. ,  EUBANK, Christopher T.

Inventor： EVANS, Neal D. ,  VANDYKE, James W. ,  HULVA, Andrew M. ,  SILFVAST, Robert D. ,  EUBANK, Christopher T.

IPC: G06F3/01 ,  G06F3/0481 ,  H04R1/10

Abstract: A display system includes a head-mounted display unit and a detachable speaker unit. The head-mounted display unit outputs visual content to a user and provides a visual pass-through of a real environment to the user. The detachable speaker unit is detachably coupleable to the head-mounted display unit for providing aural content to the user. At least one of the visual content or the aural content is changed according to a position of the detachable speaker unit relative to the head-mounted display unit.

公开(公告)号：WO2019178193A1

公开(公告)日：2019-09-19

申请号：PCT/US2019/021998

申请日：2019-03-13

Applicant: SIFIVE, INC.

Inventor： SOLOMATNIKOV, Alex ,  ASANOVIC, Krste

IPC: G06F9/30 ,  G06F9/38 ,  G06F9/455 ,  G06F11/00 ,  G06F11/14 ,  G06F12/0877

Abstract: Systems and methods are disclosed for secure control flow prediction. Some implementations may be used to eliminate or mitigate the Spectre-class of attacks in a processor. For example, an integrated circuit for executing instructions includes a control flow predictor with entries that include respective indications of whether the entry has been activated for use in a current process, wherein the integrated circuit is configured to access the indication in one of the entries that is associated with a control flow instruction that is scheduled for execution; determine, based on the indication, whether the entry of the control flow predictor associated with the control flow instruction is activated for use in a current process; and responsive to a determination that the entry is not activated for use in the current process, apply a constraint on speculative execution based on control flow prediction for the control flow instruction.

公开(公告)号：WO2019117866A1

公开(公告)日：2019-06-20

申请号：PCT/US2017/065794

申请日：2017-12-12

Applicant: GOOGLE LLC

Inventor： BIRKBECK, Neil ,  ADSUMILLI, Balineedu ,  KELLY, Damien

IPC: H04N21/233 ,  H04N21/234 ,  H04N21/2343 ,  H04N21/4728 ,  H04N21/81

CPC classification number: H04N21/816 ,  H04N21/233 ,  H04N21/23418 ,  H04N21/234345 ,  H04N21/23439 ,  H04N21/4728 ,  H04N21/812

Abstract: Signals of an immersive multimedia item are jointly considered for optimizing the quality of experience for the immersive multimedia item. During encoding, portions of available bitrate are allocated to the signals (e.g., a video signal and an audio signal) according to the overall contribution of those signals to the immersive experience for the immersive multimedia item. For example, in the spatial dimension, multimedia signals are processed to determine spatial regions of the immersive multimedia item to render using greater bitrate allocations, such as based on locations of audio content of interest, video content of interest, or both. In another example, in the temporal dimension, multimedia signals are processed in time intervals to adjust allocations of bitrate between the signals based on the relative importance of such signals during those time intervals. Other techniques for bitrate optimizations for immersive multimedia streaming are also described herein.

公开(公告)号：WO2019112837A1

公开(公告)日：2019-06-13

申请号：PCT/US2018/062613

申请日：2018-11-27

Applicant: GOPRO, INC.

Inventor： ENKE, Joseph A. ,  HANSEN, Miles ,  FERDOWSI, Mehran

IPC: G08B23/00 ,  B64C39/00 ,  G08C13/02

Abstract: A condition of an unmanned aerial vehicle (UAV) is detected using one or more sensors of the UAV and signaled according to an alert definition associated with the condition. For example, an alert definition can indicate to signal the condition by using a motor of the UAV to produce an audible tone. A tonal signal having a frequency within an audible spectrum can be generated according to the alert definition. The tonal signal and a drive signal used for supplying current to the motor can be combined to produce a combined signal. The combined signal can then be transmitted to the motor to cause the motor to produce the audible tone. In some cases, an amplitude of the tonal signal can be modulated, such as where the amplitude of the combined signal exceeds a threshold associated with an operating margin of the UAV.

公开(公告)号：WO2019112544A1

公开(公告)日：2019-06-13

申请号：PCT/US2017/064416

申请日：2017-12-04

Applicant: GOOGLE LLC

Inventor： KELLY, Damien ,  BIRKBECK, Neil ,  ADSUMILLI, Balineedu ,  IZADI, Mohammad

IPC: G06T5/00 ,  G06T5/10

CPC classification number: G06T5/002 ,  G06T5/10 ,  G06T2207/20021 ,  G06T2207/20056

Abstract: A method for denoising video content includes identifying a first frame block associated with a first frame of the video content. The method also includes estimating a first noise model that represents characteristics of the first frame block. The method also includes identifying at least one frame block adjacent to the first frame block. The method also includes generating a second noise model that represents characteristics of the at least one frame block adjacent to the first frame block by adjusting the first noise model based on at least one characteristic of the at least one frame block adjacent to the first frame block. The method also includes denoising the at least one frame block adjacent to the first frame block using the second noise model.

公开(公告)号：WO2019099084A1

公开(公告)日：2019-05-23

申请号：PCT/US2018/047223

申请日：2018-08-21

Applicant: GOOGLE LLC

Inventor： XU, Yaowu ,  HAN, Jingning ,  CHIANG, Ching-Han

IPC: H04N19/176 ,  H04N19/70 ,  H04N19/147 ,  H04N19/567 ,  H04N19/577 ,  H04N19/51

CPC classification number: H04N19/573 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/44 ,  H04N19/51 ,  H04N19/567 ,  H04N19/577 ,  H04N19/70

Abstract: A motion-field based reference frame is rendered that can be used to perform a prediction process for a first frame of a video sequence to be predicted. A first reference frame from the video sequence for forward inter prediction of the first frame is determined, as is a second reference frame from the video sequence for backward inter prediction of the first frame. A respective motion field determined for blocks of the first frame is used to determine parameters forming an affine homographic model. A current block of a reconstructed reference frame is rendered at a co-located position within a motion field-based reference frame by applying the affine homographic model to the current block. An affine homographic model may be determined for each reconstructed reference frame block to render the motion-field based reference frame.

公开(公告)号：WO2019079403A1

公开(公告)日：2019-04-25

申请号：PCT/US2018/056226

申请日：2018-10-17

Applicant: GOPRO, INC.

Inventor： GUERÍN, Guillaume Matthieu ,  AUGER, Michel ,  KRISSIAN, Karl

IPC: H04N5/235 ,  H04N5/232 ,  H04N5/225 ,  G06T5/00 ,  G02B13/06 ,  G03B37/00

CPC classification number: H04N5/235 ,  G02B13/06 ,  G03B7/091 ,  G03B37/04 ,  G06T5/008 ,  G06T2200/32 ,  G06T2207/10024 ,  H04N5/2258 ,  H04N5/23238

Abstract: Image signal processing includes generating an exposure compensated image based on a gain value applied to an exposure level of a first image and a gain value applied to an exposure level of a second image. The gain value may be progressively increased from an approximate center of the first image to an edge of the first image to a common exposure level. The gain value may be progressively decreased from an approximate center of the second image to an edge of the second image to the common exposure level. Gain values may be scaled on each color channel for a pixel based on a saturation level of the pixel.