GB/T 45348-2025 in English
VALIDInformation technology—Real time locating—Technical specification for sound source locating and imaging system
- Issued on:2025-02-28
- Implemented on:2025-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$248.00
| Standard No: | GB/T 45348-2025 |
| Document status: | VALID |
| Title in English: | Information technology—Real time locating—Technical specification for sound source locating and imaging system |
| Title in Chinese: | 信息技术 实时定位 声源定位成像系统技术规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2025-02-28 |
| Implemented on: | 2025-09-01 |
| ICS Classification: | 35.240.50-IT applications in industry |
| Chinese Classification: | L66-Computer controlled tool |
| Professional Classification: | GB-National Standard |
| Related Keywords: | sound source locating
sound source sound source pairs 20-60khz test sound source dual sound source resolution |
| Related Topics: | imaging system
imaging Imaging Imaging colocalization imaging Imaging principle biological imaging technology colocalization experiment Ellipse Imaging Technology Sound source frequency Remote Imaging Technology real-time positioning Imaging imaging principle femtosecond imaging technology Sound source localization |
《GB/T 45348-2025信息技术 实时定位 声源定位成像系统技术规范》由TC28（全国信息技术标准化技术委员会）归口，主管部门为国家标准委。
Introduction
Analysis of core technology architecture
| Technical level | Core components | Functional indicators |
|---|---|---|
| Data acquisition layer | Microphone array + camera device | Azimuth angle ≥48° Pitch angle ≥35° |
| Data processing layer | Sound source localization module | Real-time ≤500ms |
| Interaction layer | Audio-visual overlay module | Frame rate ≥ 25f/s |
Detailed explanation of key performance indicators
Positioning accuracy is required to be ≤3°, calculated by the formula θ=(B'C'/r)×180/π, where B' is the imaging mapping center, C' is the actual center of the sound source, and r is the measurement distance. During the test, it is necessary to maintain a distance of 2m and continuously collect 30 seconds of video data.
Dual sound source resolution is ≤10°. The test uses four sets of sound source pairs (P1, P5)-(P4, P8), and the system is required to display the imaging bright spots of two sound sources at the same time.
Technology Evolution Analysis
This standard deeply integrates the microphone array coordinate system (Appendix B) with the video imaging system for the first time. Compared with GB/T36464.1-2020:
- Added environmental compensation mechanism for temperature, humidity and air pressure sensing
- Introduced the sound pressure level calculation formula Lp=20lg(p/p0)
- Cleared the delay and summation beamforming algorithm (Appendix A)
Implementation Suggestions
- The array layout must meet the coordinate system definition of Clause 3.4
- The environmental test needs to control the background noise ≤30dB (Clause 6.1.1)
- Preferably use 20-60kHz test sound source (Clause 6.1.2)
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