公开(公告)号：US20170345458A1

公开(公告)日：2017-11-30

申请号：US15602687

申请日：2017-05-23

Applicant: Axis AB

Inventor： Björn Berglund ,  Xing Danielsson Fan

IPC: G11B27/00 ,  G11B27/30 ,  G11B27/34

CPC classification number: G11B27/005 ,  G11B27/002 ,  G11B27/102 ,  G11B27/3036 ,  G11B27/3081 ,  G11B27/34

Abstract: A method and an apparatus for playing back recorded video from a temporal position within a temporal range of the recorded video is disclosed. The recorded video including intra frames and inter frames and the recorded video including video sequences having different frame rates. The method comprises receiving a request for playing back the recorded video from a specific temporal position recorded in the recorded video, identifying an intra frame at an earlier temporal position in the recorded video than the specific temporal position received in the request, playing back the recorded video in a first mode from the identified intra frame, and playing back the recorded video in a second mode from the specific temporal position in the recorded video when the playing back of the recorded video in the first mode have arrived at the specific temporal position of in the recorded video.

公开(公告)号：US09805287B2

公开(公告)日：2017-10-31

申请号：US14927687

申请日：2015-10-30

Applicant: AXIS AB

Inventor： Viktor Edpalm ,  Lars Persson ,  Xing Danielsson Fan ,  Fredrik Pihl ,  Alexandre Martins

IPC: G06K9/62 ,  H04N19/176 ,  H04N19/119 ,  H04N19/124 ,  H04N19/14 ,  H04N19/85 ,  H04N19/172 ,  H04N19/182 ,  H04N19/60

CPC classification number: G06K9/6215 ,  H04N19/119 ,  H04N19/124 ,  H04N19/14 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/60 ,  H04N19/85

Abstract: A method of identifying relevant areas in digital images is provided. The method comprises receiving information representative of pixels in a first digital image, and calculating a spatial statistical measure of said information for groups of neighboring pixels in said first image to form a group value for each group of pixels. Further, the method comprises calculating differences between group values, and comparing said differences to a predetermined threshold value. If said difference is equal to or above said threshold value, said group is identified as relevant, and if said difference is below said threshold value, said group is identified as not relevant. A method of encoding digital images based on the identification of relevant and non-relevant areas is also provided, as well as a digital encoder system.

公开(公告)号：US20160142705A1

公开(公告)日：2016-05-19

申请号：US14939590

申请日：2015-11-12

Applicant: Axis AB

Inventor： Xing Danielsson Fan ,  Viktor Edpalm ,  Fredrik Pihl ,  Lars Persson ,  Alexandre Martins

IPC: H04N19/105 ,  H04N19/107 ,  H04N19/177 ,  H04N19/593 ,  H04N19/182 ,  H04N19/186 ,  H04N19/503 ,  H04N19/114 ,  H04N19/179

CPC classification number: H04N19/105 ,  H04N19/107 ,  H04N19/114 ,  H04N19/137 ,  H04N19/142 ,  H04N19/172 ,  H04N19/177 ,  H04N19/179 ,  H04N19/182 ,  H04N19/186 ,  H04N19/503 ,  H04N19/593 ,  H04N19/87

Abstract: A method for encoding video is disclosed. The method comprises the steps of receiving information representative of pixels in a current digital image frame of a video to be encoded, calculating a group value for each group of neighboring pixels based on the received information, accumulating group values of corresponding groups of pixels in a first sequence of frames to form a first accumulation of accumulated group values, accumulating group values of corresponding groups of pixels in a second sequence of frames to form a second accumulation of accumulated group values, wherein the second sequence includes frames captured over a longer period of time than the first sequence, comparing accumulated group values of the first accumulation with accumulated group values of the second accumulation, calculating a global change value based on the comparison, setting a GOP length based on the global change value; and encoding the current image frame as an intra-frame or inter-frame based on the GOP length. An encoder system for encoding video is also disclosed.

Abstract translation: 公开了一种视频编码方法。 该方法包括以下步骤：接收表示要编码的视频的当前数字图像帧中的像素的信息，基于接收的信息计算每组相邻像素的组值，累积相应像素组的组值 第一序列的帧以形成累积的组值的第一累积，在第二帧序列中累加相应的像素组的组值，以形成累积组值的第二累加，其中第二序列包括在较长时间段 比较所述第一序列的时间，比较所述第一累积的累积组值与所述第二累积的累积组值，基于所述比较计算全局变化值，基于所述全局变化值设置GOP长度; 并且基于GOP长度将当前图像帧编码为帧内或帧间。 还公开了一种用于编码视频的编码器系统。

公开(公告)号：US20160140421A1

公开(公告)日：2016-05-19

申请号：US14927687

申请日：2015-10-30

Applicant: AXIS AB

Inventor： Viktor Edpalm ,  Lars Persson ,  Xing Danielsson Fan ,  Fredrik Pihl ,  Alexandre Martins

IPC: G06K9/62 ,  H04N19/182 ,  H04N19/172 ,  H04N19/176 ,  H04N19/60

CPC classification number: G06K9/6215 ,  H04N19/119 ,  H04N19/124 ,  H04N19/14 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/60 ,  H04N19/85

Abstract: A method of identifying relevant areas in digital images is provided. The method comprises receiving information representative of pixels in a first digital image, and calculating a spatial statistical measure of said information for groups of neighboring pixels in said first image to form a group value for each group of pixels. Further, the method comprises calculating differences between group values, and comparing said differences to a predetermined threshold value. If said difference is equal to or above said threshold value, said group is identified as relevant, and if said difference is below said threshold value, said group is identified as not relevant. A method of encoding digital images based on the identification of relevant and non-relevant areas is also provided, as well as a digital encoder system.

Abstract translation: 提供了识别数字图像中相关区域的方法。 该方法包括接收表示第一数字图像中的像素的信息，以及计算所述第一图像中的相邻像素组的所述信息的空间统计量度，以形成每组像素的组值。 此外，该方法包括计算组值之间的差异，并将所述差异与预定阈值进行比较。 如果所述差值等于或高于所述阈值，则所述组被识别为相关，并且如果所述差值低于所述阈值，则所述组被识别为不相关。 还提供了一种基于相关和非相关区域的识别对数字图像进行编码的方法，以及数字编码器系统。