公开(公告)号：US11223834B2

公开(公告)日：2022-01-11

申请号：US17069921

申请日：2020-10-14

Applicant: Axis AB

Inventor： Xing Danielsson Fan ,  Maya Shah ,  Mattias Pettersson ,  Adam Schill Collberg ,  Fredrik Pihl ,  Magnus Söderdahl ,  Peter Wilhelmsson

IPC: H04N7/12 ,  H04N19/176 ,  H04N19/172 ,  H04N19/593 ,  H04N19/61

Abstract: Video encoding, and specifically to a method and an encoder which can adapt the probability of intra refresh of image frame subdivisions based on a count of image frames since a previous refresh and modulated through convex or concave shaped distribution functions are set forth herein.

公开(公告)号：US11025906B2

公开(公告)日：2021-06-01

申请号：US16678131

申请日：2019-11-08

Applicant: Axis AB

Inventor： Viktor Edpalm ,  Maya Shah

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/172 ,  H04N19/513

Abstract: Video encoding is provided using periodic intra refresh, which can adapt padding of an intra encoding region between image frames based on a current level motion in the image frame. Upon a current level of motion not exceeding a first threshold, an intra encoding region of the image frame according to a predefined periodic intra refresh pattern is intra encoded. Upon the current level of motion exceeding the first threshold, the intra encoding region of the image frame is expanded to overlap to a determined extent with a previously encoded intra encoding region among the plurality of image frames, and the expanded intra encoding region of the image frame is intra encoded. Regions of the image different from the intra encoding regions and the expanded intra encoded region, respectively are inter frame encoded.

公开(公告)号：US11444884B2

公开(公告)日：2022-09-13

申请号：US17082111

申请日：2020-10-28

Applicant: Axis AB

Inventor： Viktor Edpalm ,  Maya Shah

IPC: H04L12/823 ,  H04N19/172 ,  H04L47/32

Abstract: A method for encoding and transmitting a plurality of image frames of a video stream includes: intra refresh encoding the plurality of image frames; encoding one image frame of the plurality of image frames to produce encoded image data of the one image frame, the encoded image data being organized in a plurality of data packets, wherein the encoding comprises intra frame encoding the one image frame; transmitting, over a time period, the intra refresh encoded image frames; transmitting the plurality of data packets, wherein the transmission of the plurality of data packets is distributed over the time period during which the intra refresh encoded image frames are transmitted. An interrelated method for receiving and storing the plurality of image frames, as well as devices and computer program products for performing the methods, are also provided.

公开(公告)号：US20200169727A1

公开(公告)日：2020-05-28

申请号：US16678131

申请日：2019-11-08

Applicant: Axis AB

Inventor： Viktor Edpalm ,  Maya Shah

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/172 ,  H04N19/513

Abstract: Video encoding uses periodic intra refresh, which can adapt padding of an intra encoding region between image frames based on motion in the image frame.