公开(公告)号：US10382780B2

公开(公告)日：2019-08-13

申请号：US15928798

申请日：2018-03-22

Applicant: Axis AB

Inventor： Anton Öhrn ,  Viktor Edpalm ,  Henrik Eliasson ,  Björn Benderius ,  Niclas Svensson ,  Xing Danielsson Fan ,  Fredrik Pihl

IPC: H04N19/117 ,  H04N19/137 ,  H04N19/107 ,  H04N19/55 ,  H04N19/593 ,  H04N19/182 ,  H04N19/503 ,  H04N19/159 ,  H04N19/176

Abstract: A method of encoding a video stream comprising receiving a frame of a video stream to be encoded, performing motion detection in the frame to identify steady regions, and temporally filtering the frame so as to provide temporally filtered pixel values. For a pixel in the steady regions of the frame, the temporally filtered pixel value is used when encoding the pixel, on a condition that the pixel belongs to a block of pixels of the frame that will be intra-coded. On a condition that the pixel instead belongs to a block of pixels of the frame that will be inter-coded, a value that was used when encoding a corresponding pixel of the immediately preceding frame is used when encoding the pixel.

公开(公告)号：US20180278849A1

公开(公告)日：2018-09-27

申请号：US15928722

申请日：2018-03-22

Applicant: Axis AB

Inventor： Fredrik Pihl ,  Xing Danielsson Fan ,  Björn Benderius ,  Viktor Edpalm ,  Niclas Svensson ,  Henrik Eliasson

IPC: H04N5/232 ,  H04N19/139 ,  H04N19/105 ,  H04N19/154 ,  H04N19/177

CPC classification number: H04N5/23267 ,  H04N5/23229 ,  H04N5/23232 ,  H04N5/23254 ,  H04N5/243 ,  H04N19/105 ,  H04N19/139 ,  H04N19/154 ,  H04N19/177

Abstract: A method for controlling a video camera which is configured to capture and process image frames prior to encoding. The method comprises determining whether the video camera is going to encode an image frame as an intra-frame or an inter-frame. If the image frame is going to be encoded as an inter-frame, the video camera is controlled to capture and process the image frame using first settings prior to encoding. If the image frame is going to be encoded as an intra-frame, the video camera is controlled to capture and process the image frame using second settings prior to encoding, wherein the second settings are modified in relation to the first settings to further reduce a level of noise in the image frame.

公开(公告)号：US10531001B2

公开(公告)日：2020-01-07

申请号：US15928722

申请日：2018-03-22

Applicant: Axis AB

Inventor： Fredrik Pihl ,  Xing Danielsson Fan ,  Björn Benderius ,  Viktor Edpalm ,  Niclas Svensson ,  Henrik Eliasson

IPC: H04N5/232 ,  H04N19/139 ,  H04N19/105 ,  H04N19/177 ,  H04N19/154 ,  H04N5/243

Abstract: A method for controlling a video camera which is configured to capture and process image frames prior to encoding. The method comprises determining whether the video camera is going to encode an image frame as an intra-frame or an inter-frame. If the image frame is going to be encoded as an inter-frame, the video camera is controlled to capture and process the image frame using first settings prior to encoding. If the image frame is going to be encoded as an intra-frame, the video camera is controlled to capture and process the image frame using second settings prior to encoding, wherein the second settings are modified in relation to the first settings to further reduce a level of noise in the image frame.

公开(公告)号：US20180278953A1

公开(公告)日：2018-09-27

申请号：US15928798

申请日：2018-03-22

Applicant: Axis AB

Inventor： Anton Öhrn ,  Viktor Edpalm ,  Henrik Eliasson ,  Björn Benderius ,  Niclas Svensson ,  Xing Danielsson Fan ,  Fredrik Pihl

IPC: H04N19/55 ,  H04N19/182 ,  H04N19/593

CPC classification number: H04N19/55 ,  H04N19/117 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/503 ,  H04N19/593

Abstract: A method of encoding a video stream comprising receiving a frame of a video stream to be encoded, performing motion detection in the frame to identify steady regions, and temporally filtering the frame so as to provide temporally filtered pixel values. For a pixel in the steady regions of the frame, the temporally filtered pixel value is used when encoding the pixel, on a condition that the pixel belongs to a block of pixels of the frame that will be intra-coded. On a condition that the pixel instead belongs to a block of pixels of the frame that will be inter-coded, a value that was used when encoding a corresponding pixel of the immediately preceding frame is used when encoding the pixel.