公开(公告)号：US20240163456A1

公开(公告)日：2024-05-16

申请号：US18503393

申请日：2023-11-07

Applicant: Axis AB

Inventor： Viktor Edpalm ,  Johan Palmaeus ,  Alexander Toresson

IPC: H04N19/159 ,  H04N19/172 ,  H04N19/177

CPC classification number: H04N19/159 ,  H04N19/172 ,  H04N19/177

Abstract: An improved method of managing encoded image frames in a data buffer is presented. Encoded image frames are buffered, for example in a pre-event buffer, in such a way that all stored, e.g., buffered, encoded image frames can be retrieved from the data buffer as a decodable video sequence and such that only those encoded image frames needed for obtaining a decodable video sequence having a pre-defined recording time may be stored in the data buffer. This may be referred to as pruning the data buffer in such a way that all stored encoded image frames can be retrieved from the data buffer as a decodable video sequence having a pre-defined recording time. Thereby, only the encoded image frames needed for generating the video sequence may be stored in the data buffer. Consequently, no extra space for storage of an extra GOP is needed in the data buffer.

公开(公告)号：US11722697B2

公开(公告)日：2023-08-08

申请号：US17530739

申请日：2021-11-19

Applicant: Axis AB

Inventor： Viktor Edpalm ,  Alexander Toresson ,  Johan Palmaeus ,  Jonas Cremon

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/597 ,  H04N19/105 ,  H04N19/172 ,  H04N19/88 ,  H04N5/04

CPC classification number: H04N19/597 ,  H04N5/04 ,  H04N19/105 ,  H04N19/172 ,  H04N19/88

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.