GA/T 2000.249-2019 in English

VALID

Information codes for public security industry—Part 249:Coding rules for semantic object identity for video and image information

Issued on:2019-08-28
Implemented on:2019-10-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $100.00
$97.00

Standard No:	GA/T 2000.249-2019
Document status:	VALID
Title in English:	Information codes for public security industry—Part 249:Coding rules for semantic object identity for video and image information
Title in Chinese:	公安信息代码第249部分：视频图像信息语义属性对象标识编码规则
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2019-08-28
Implemented on:	2019-10-01
ICS Classification:	35.040-Character sets and information coding
Chinese Classification:	A90-Social and public safety in general
Professional Classification:	GA-Security
Related Keywords:	video image information image object image information introduction analysis face image first image file
Related Topics:	video encoding information image object image information Public security information code Public Security Information Code Part 32 Public security information code Public Security Information Code Part 22 image information Public security information code 45 Public Security Information 28 Industry standard public security information code Information Management Standard Coding Guidelines Public security information ga/t1012-2019 ga/t49-2019

本部分规定了视频图像信息语义属性对象标识的编码规则。
本部分适用于公安信息化建设以及信息的处理与管理。

Introduction

Analysis of the standard technical framework

As the 249th sub-standard of the GA/T 2000 series, this part constructs a 48-bit hierarchical coding system for video image information semantic attribute objects. The coding design strictly follows the equipment coding specification of Appendix D of GB/T 28181-2016 to achieve seamless integration with existing video surveillance systems.

Detailed explanation of encoding structure

Level	Number of digits	Encoded content	Example description
First layer	1-20 digits	Device code	Refer to 20-digit device ID of GB/T 28181
Second layer	21-22 digits	Basic object type	01(video clip)/02(image)/03(file)
Third layer	23-36 bits	Timestamp	YYYYMMDDhhmmss format

Semantic attribute encoding practice

Take the face image collected by Hikvision camera as an example:
1-20 bits: device area code (such as 31011500101320012345)
21-22 bits: 02 (image object)
23-36 bits: 20230815143000 (August 15, 2023 14:30:00)
37-41 bits: 00001 (first image file)
42-43 bits: 06 (semantic face type)
44-48 bits: 00001 (the first face in the image)

Analysis of standard evolution

Compared with the early basic coding standards such as GA/T 2000.28, this part innovatively:
1. Introduces classification coding of semantic attribute objects (personnel/vehicle/scene, etc.)
2. Achieves timestamp accuracy to the second level
3. Supports millions of object identifications

Implementation suggestions

1. Equipment manufacturers need to upgrade their firmware to support 48-bit code generation
2. The platform system should establish a code-metadata mapping database
3. It is recommended to keep synchronized updates with the SDK of Uniview Technologies and other drafting units

More samples: NB/T 47013.2-2015 JGJ 94-2008 DL/T 368-2010

Sample only — not a preview of GA/T 2000.249-2019

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