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Witness protection method and device for real-time collection of audio and video evidence

A real-time collection, audio and video technology, applied in image communication, selective content distribution, electrical components, etc., can solve problems such as witness identity leakage, and achieve the effect of improving efficiency

Active Publication Date: 2019-07-16
ZHEJIANG DAHUA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the mosaic processing area is manually set and fixed. During the trial, if the witness moves relative to the camera, the identity of the witness will be leaked

Method used

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  • Witness protection method and device for real-time collection of audio and video evidence
  • Witness protection method and device for real-time collection of audio and video evidence
  • Witness protection method and device for real-time collection of audio and video evidence

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Embodiment Construction

[0055]A witness protection method and device for real-time collection of audio and video evidence provided by the present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0056] like figure 1 As shown, the embodiment of the present invention provides a witness protection method for real-time collection of audio and video evidence, and its specific implementation is as follows:

[0057] Step 110: Face detection is performed on the video image of the original video of the witness testifying collected in real time.

[0058] Step 120: If a face is detected, perform mosaic processing on the face area in the video image according to the position and size of the face area, and encode the video image after mosaic processing; otherwise, encode the video image of the original video.

[0059] Wherein, the human face area can be represented by the image area framed by the smallest rectangular frame that frames the detected hu...

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Abstract

The embodiment of the invention discloses a witness protection method and device for real-time collection of audio and video evidence. The method includes: performing face detection on the video image of the original video of the witness testifying collected in real time; if a face is detected, performing mosaic processing on the face area in the video image according to the position and size of the face area, and Video image encoding after mosaic processing; otherwise, the video image encoding of the original video; voice-changing processing on the original audio of the witness testifying collected in real time; encoding the audio after voice-changing processing; combining the encoded video image with the encoded Audio and video are synchronously synthesized; the audio and video are sent to the non-evidence collection field equipment for playback, in response to the evidence collection request information received from the non-evidence collection field equipment. In this solution, the efficiency of evidence collection is improved, and the identity of the witness is prevented from being leaked due to manual setting of the mosaic area when the witness moves relative to the camera.

Description

technical field [0001] The invention relates to the technical field of evidence collection, in particular to a witness protection method and device for real-time collection of audio and video evidence. Background technique [0002] At the scene of the court trial, witnesses are often required to testify, but some witnesses are inconvenient to testify in court directly, such as tainted witnesses. A tainted witness is a special kind of witness who is a participant in criminal activities and has criminal taints, but can be prosecuted for the state The organ testifies to testify against other criminals. For the sake of the witness’s personal safety, the currently commonly used methods for witnesses to testify are as follows: [0003] Method 1. Pre-record a piece of audio and video (including synchronous audio and video) of the witness testifying, and then process the video image, that is, mosaic the face part, and change the sound of the audio to avoid the identity of the witnes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/43H04N21/431H04N21/439H04N21/4402H04N21/441
Inventor 蔡龙之田奎张世龙
Owner ZHEJIANG DAHUA TECH CO LTD
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