US 12,355,981 B2
Image processing device and a method for encoding a view area within an image frame of a video into an encoded video area frame
Viktor Edpalm, Lund (SE); Song Yuan, Lund (SE); Toivo Henningsson, Lund (SE); and Johan Palmaeus, Lund (SE)
Assigned to Axis AB, Lund (SE)
Filed by Axis AB, Lund (SE)
Filed on Nov. 3, 2022, as Appl. No. 17/980,156.
Claims priority of application No. 21211747 (EP), filed on Dec. 1, 2021.
Prior Publication US 2023/0171409 A1, Jun. 1, 2023
Int. Cl. H04N 19/159 (2014.01); G06T 7/11 (2017.01); G06T 9/00 (2006.01); G06V 10/25 (2022.01)
CPC H04N 19/159 (2014.11) [G06T 7/11 (2017.01); G06T 9/00 (2013.01); G06V 10/25 (2022.01)] 11 Claims
OG exemplary drawing
 
1. A method for encoding a view area within a current image frame of a video comprising a plurality of image frames into an encoded video area frame, wherein the view area is a respective subarea of each image frame of the plurality of image frames, wherein each image frame of the plurality of image frames comprises a first image portion and a second image portion, wherein, between a previous image frame of the video and the current image frame of the video, the view area moves across a boundary between the first image portion and the second image portion, wherein a first encoder arranged in a first processing circuitry is configured to encode image data of the first image portion of each image frame of the plurality of image frames and a second encoder arranged in a second processing circuitry is configured to encode image data of the second image portion of each image frame of the plurality of image frames, the method comprising:
identifying a first portion of the view area that is located in the first image portion in both the previous image frame and the current image frame,
identifying a second portion of the view area that is located in the first image portion in the previous image frame and in the second image portion in the current image frame,
identifying a third portion of the view area that is located in the second image portion in both the previous image frame and the current image frame,
inter-coding, by the first encoder, image data of the first portion of the view area in the current image frame as a first encoded slice/tile by referring to reference image data corresponding to the previous image frame buffered in a first reference buffer arranged in the first processing circuitry,
intra-coding, by the second encoder, all image data of the second portion of the view area in the current image frame as a second encoded slice/tile and refraining from inter-coding of any image data of the second portion of the view area in the current image frame,
inter-coding, by the second encoder, image data of the third portion of the view area in the current image frame as a third encoded slice/tile by referring to reference image data corresponding to the previous image frame buffered in a second reference buffer arranged in the second processing circuitry, and
merging the first encoded slice/tile, the second encoded slice/tile, and the third encoded slice/tile into the encoded video area frame.