公开(公告)号：US20220201330A1

公开(公告)日：2022-06-23

申请号：US17530739

申请日：2021-11-19

Applicant: Axis AB

Inventor： Viktor EDPALM ,  Alexander TORESSON ,  Johan PALMAEUS ,  Jonas CREMON

IPC: H04N19/597 ,  H04N19/88 ,  H04N19/105 ,  H04N19/172 ,  H04N5/04

Abstract: A method for forming a combined image frame of a combined video stream comprises: capturing image frames of first and second video streams; encoding image data of the image frames of the first and second video streams, wherein each image frame of the first and second video streams are respectively encoded into first and second encoded data comprising a plurality of rows wherein each row has a height of a single coding unit and a width equal to a width of the image frame and is encoded as one or more slices; and combining the first and second encoded data into combined encoded data by interleaving rows of the first and second encoded data. The combined encoded data representing the combined image frame of the combined video stream.

公开(公告)号：US20230177733A1

公开(公告)日：2023-06-08

申请号：US18073993

申请日：2022-12-02

Applicant: Axis AB

Inventor： Viktor EDPALM ,  Alexander TORESSON ,  Johan PALMAEUS

IPC: G06T9/00 ,  G06T3/40

CPC classification number: G06T9/00 ,  G06T3/40

Abstract: An encoding device and a method for encoding an image frame comprising a plurality of pixel blocks are provided. A respective offset compression value is set for each of the plurality of pixel blocks based on an interest level associated with the pixel block, wherein each offset compression value defines an offset in relation to a reference compression value set for the image frame. In the image frame, one or more low contrast regions having a contrast which is below a predefined contrast threshold are identified. For pixel blocks within the one or more low contrast regions having set offset compression values based on the associated interest levels higher than a predefined offset compression threshold, the set offset compression values are selectively restricted to be at most equal to the predefined offset compression threshold. The image frame is then encoded using the set offset compression values.

公开(公告)号：US20230171409A1

公开(公告)日：2023-06-01

申请号：US17980156

申请日：2022-11-03

Applicant: Axis AB

Inventor： Viktor EDPALM ,  Song YUAN ,  Toivo HENNINGSSON ,  Johan PALMAEUS

IPC: H04N19/159 ,  G06T7/11 ,  G06T9/00 ,  G06V10/25

CPC classification number: H04N19/159 ,  G06T7/11 ,  G06T9/00 ,  G06V10/25

Abstract: A and method encode a view area within a current image frame of a video into an encoded video area frame. The view area is a respective subarea of each image frame, each image frame comprising first and second image portions, and between previous and current image frames, the view area moves across a boundary between the first and second image portions. First and second encoders are encode image data of the first and second image portions, respectively. First, second and third portions of the view area are identified based on their respective location in the previous and current image frames. Image data of the first and third portions are inter-coded as first and third encoded slices/tiles. Image data of the second portion of the view area in the current image frame are intra-coded as a second encoded slice/tile. The encoded slices/tiles are merged into the encoded video area frame.