GB/T 39574-2020 in English
VALIDTechnical requirements for content decency of smart terminal
- Issued on:2020-12-14
- Implemented on:2021-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 39574-2020智能终端内容过滤技术要求》由TC485（全国通信标准化技术委员会）归口，主管部门为工业和信息化部（通信）。
Introduction
Analysis of the core framework of the standard
| Technical Dimensions | Traditional Filtering Technology | GB/T39574-2020 Requirements |
|---|---|---|
| Coverage Network | Single Internet | Integration of Public Internet + Telecommunications Network + TV Network |
| Content Type | Text-based | Text+Image+Audio+Video+URL Full Media |
| Implementation Method | Independent Software | Pre-installed Software + Operating System Level Integration Dual Mode |
Key technology implementation requirements
1. Multimodal filtering technology
The standard requires that smart terminals must implement the three technologies of text keyword matching, semantic analysis and multimedia feature recognition:
- Text filtering: It must support real-time scanning at the smallest granularity to the word level, and the accuracy rate of identifying illegal information must be ≥90%
- Image recognition: It is mandatory to process JPEG/PNG/BMP/GIF formats through the dual mechanisms of hash value comparison + feature extraction
- Streaming media analysis: Video must implement key frame extraction and analysis, and audio uses voiceprint feature matching technology
2. Dual-channel filtering architecture
Implementation plan for a certain brand of mobile phone:
Local feature library (500MB) + cloud dynamic update (daily increment), automatically switch to cloud analysis in WLAN environment, and prioritize local processing in mobile network.
Key points for compliance implementation
Performance indicator requirements
| Indicator | Threshold | Test method |
|---|---|---|
| Accuracy | ≥90% | Cross-validation of thousands of samples |
| CPU usage | ≤15% | 1080P video playback scenario test |
Security management specifications
- Two-factor administrator authentication using biometric recognition or dynamic password must be implemented
- Log records must include a complete operation chain: timestamp (accurate to milliseconds) + device ID + operation content
- It is prohibited to transmit filtering feature libraries through HTTP plain text, and TLS1.2+ encryption is mandatory
Standard Evolution Analysis
Compared with the YD/T2054-2009 standard, this version has the following major breakthroughs:
1) Expanded coverage of new transmission channels such as 5G messages and Internet of Things protocols
2) Increased requirements for identifying deep fakes
3) Introducing the federated learning mechanism to protect user privacy
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