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Method and system for playing back recorded video

A video and video streaming technology, applied in data recording, recording information storage, recording carrier parts, etc., can solve problems such as time-consuming and complex, and achieve the effect of small processing capacity and less configuration

Active Publication Date: 2018-07-06
AXIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, configuring and applying video analysis rules to aid e-forensic searches for specific events can often be a complex and time-consuming problem, as there are many different types of events that are difficult to generalize and qualify in a common way, in many areas of interest. event, it can also be difficult to define exactly what are the distinguishing attributes to look for until the actual event is found in the video clip

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  • Method and system for playing back recorded video
  • Method and system for playing back recorded video
  • Method and system for playing back recorded video

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Embodiment Construction

[0037] Digital video recordings and video streams are represented by a sequence of image frames that are captured and played back at a specified frequency. This frequency often refers to the frame rate or fps, and the following "frames per second" is the unit of the given frame rate. When a surveillance camera is recording video from a scene, the surveillance camera may eg be set to encode the video sequence at an encoder frame rate of eg 15 fps. When playing back the recorded video sequence from the surveillance camera, the playback frame rate can thus be set to 15 fps to play back the video sequence at the same speed as it was encoded.

[0038] However, when reviewing a large amount of footage, it may be useful to fast-forward the playback of the recorded video sequence, and, for example, double speed, playback the recorded video sequence of the above example to be set to 30fps playback frame rate for playback, that is, the encoder frame rate is multiplied by 2. In this wa...

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Abstract

The present invention relates to a method, video server and system for playing back recorded video. The invention is based on comparing the encoder frame rates at temporal positions of a received video sequence to a predetermined threshold and changing the playback frame rate to a playback frame rate greater than the encoder frame rate if the encoder frame rate is below the predetermined thresholdand changing the playback frame rate to the encoder frame rate if the encoder frame rate is greater than the predetermined threshold. Recorded video is thereby played back in a time efficient manner,decreasing the total time period for video playback, and assisting a security operator in finding parts of the recorded video that may be of interest.

Description

technical field [0001] The invention relates to the field of video monitoring. In particular, it relates to a method and system for playing recorded video. Background technique [0002] Video management systems are typically set up to process footage from surveillance camera systems monitoring eg premises, office buildings, shopping malls, public transport systems, etc. Video management systems are typically managed by a team of security operators who use captured video footage for on-site surveillance and forensic searches of video sequences related to incidents of interest. Events of interest to search for in recorded video sequences may be of various natures, such as a bus crashing into a parked car, a robbery at a bank, a fight between two people, a person dropping a suitcase on a platform, etc. . [0003] Manual browsing of video recordings by security operators in search of specific events of interest is tedious and time-consuming, as there are typically a large num...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/2343H04N21/234H04N5/93H04N7/18
CPCH04N5/93H04N7/181H04N21/23418H04N21/234381H04N21/43072H04N5/76G11B27/005H04N21/47217H04N21/440281H04N21/4344H04N21/2387H04N21/8547H04N9/87H04N5/77H04N21/2743H04N19/87G11B27/10
Inventor 比约恩·贝里隆德范星
Owner AXIS