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Method and apparatus for playing back recorded video

A video and video streaming technology, applied in data recording, recording information storage, recording carrier parts, etc., can solve the problems of time-consuming and complex

Active Publication Date: 2021-12-24
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 apparatus for playing back recorded video
  • Method and apparatus for playing back recorded video
  • Method and apparatus 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 invention discloses a method and device for playing back a recorded video, which relates to a method, a video server and a system for playing back a recorded video. The invention is based on comparing the encoder frame rate at a temporal location of the received video sequence with a predetermined threshold, and if the encoder frame rate is below the predetermined threshold, changing the playback frame rate to be greater than the encoder frame rate and changing the playback frame rate to the encoder frame rate if the encoder frame rate is greater than a predetermined threshold. Thus, the recorded video is played back in a time-efficient manner, reducing the overall time period of video playback, and assisting security operators in finding portions of the recorded video that may be of interest.

Description

technical field [0001] The invention relates to the field of video surveillance. 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 n...

Claims

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Application Information

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Patent Type & Authority Patents(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