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GA/T 1950-2021 English PDF

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GA/T 1950-2021: Forensic sciences - Technical specifications for forensic identification of video recording devices
Status: Valid
Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GA/T 1950-2021169 Add to Cart 3 days Forensic sciences - Technical specifications for forensic identification of video recording devices Valid

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Basic data

Standard ID: GA/T 1950-2021 (GA/T1950-2021)
Description (Translated English): Forensic sciences - Technical specifications for forensic identification of video recording devices
Sector / Industry: Public Security (Police) Industry Standard (Recommended)
Classification of Chinese Standard: A92
Word Count Estimation: 7,766
Issuing agency(ies): Ministry of Public Security

GA/T 1950-2021: Forensic sciences - Technical specifications for forensic identification of video recording devices


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Forensic sciences - Technical specifications for forensic identification of video recording devices ICS 13.310 CCSA92 People's Republic of China Public Safety Industry Standards Forensic science video equipment appraisal technical specification Published on 2021-10-14 2022-05-01 Implementation Published by the Ministry of Public Security of the People's Republic of China

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by the National Criminal Technology Standardization Technical Committee Photographic Inspection Sub-Technical Committee (SAC/TC179/SC5) and focal point. This document is drafted by. Academy of Forensic Appraisal, Ministry of Public Security Material Evidence Appraisal Center, Guangdong Tianzheng Forensic Appraisal Center, China Criminal Police Check College. The main drafters of this document. Shi Shaopei, Yang Xu, Zeng Jinhua, Lu Qimeng, Li Yan, Bian Xinwei, Xi Jianhua, Chen Xiaohong, Sun Weilong, Xu Lei, Xie Lanchi, Hao Xinhua, Yang Hongchen. Forensic science video equipment appraisal technical specification

1 Scope

This document specifies the steps, methods and appraisal opinions of video recording equipment in the appraisal of audio-visual materials. This document is applicable to the identification of video equipment in the identification of audio-visual materials, and can also be used to identify whether video materials are recorded on the same machine.

2 Normative references

There are no normative references in this document.

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Through technical manuals such as file attribute and metadata inspection, image inspection, audio inspection, noise floor analysis and other statistical feature analysis It is a professional judgment on whether the video of the inspection material is recorded by a certain video equipment. 3.2 Questionedvideos Video recordings that need to be identified. 3.3 Sample videos knownvideos Video recordings for comparison and contrast. 3.4 The video equipment that needs to be inspected and certified is generally the video equipment that is suspected to record the video of the inspection material or the submitter of the video of the inspection material (recording party) Claimed video recording device. 3.5 metadata metadata The data in digital video that describe information such as video properties, recording parameters and data structure. 3.6 A noise signal generated during recording that is only related to the recording device.

4 steps and methods

4.1 Know the situation 4.1.1 Understand the formation process of the inspection material video, focusing on understanding the inspection material video recording environment, the recording parameter settings of the video equipment, etc. 4.1.2 Understand the function and usage of the video recording equipment to be inspected.
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