GB/T 50526-2021

Public broadcasting system engineering technical standards (English Version)

Standard No.

GB/T 50526-2021

Language

Chinese, English version preview

Release Date

2021

Published By

Ministry of Housing and Urban-Rural Development of the People's Replublic of China

Latest

GB/T 50526-2021

Scope

The "Technical Standards for Public Broadcasting System Engineering" is now approved as a national standard, numbered GB/T50526-2021, and will be implemented from October 1, 2021. The original national standard "Technical Specifications for Public Broadcasting System Engineering" (GB50526-2010) will be abolished at the same time. This standard is published on the website of the Ministry of Housing and Urban-Rural Development (www.mohurd.gov.cn), and is published by China Planning Publishing House Co., Ltd. organized by the Institute of Standards and Quotas of the Ministry of Housing and Urban-Rural Development. Ministry of Housing and Urban-Rural Development April 9, 2021

Introduction

1. Background of Standard Formulation and Analysis of Technology Evolution

As an important part of modern buildings and public places, the public broadcasting system has functions including business broadcasting, background broadcasting and emergency broadcasting. With the development of science and technology, the function and performance requirements of the system are also constantly improving. Disney Audio Equipment absorbed advanced technologies at home and abroad during the revision of the standard, especially in wireless broadcasting and emergency broadcasting.

---

2. Comparative Analysis of Standard Frameworks

Chapter Contents	Improvements in the New Standard	Main Differences from the Old Standard
Design Requirements for Public Broadcasting Systems	Added matrix partitioning and partition forced insertion functions	Does not involve the application of modern wireless transmission technology
Transmission Line Specifications	Optimized the low-level signal transmission method	Only specified the conditions for the use of constant-pressure speakers
System Acceptance Criteria	Added remote monitoring and fault self-checking function requirements	No detailed digital management content

Actual application case: Application of Disney audio equipment in airports

Through the implementation of Disney audio equipment, an international airport achieved seamless switching of business broadcasts, background music and emergency broadcasts. The system adopts matrix partition management to ensure independent control of different areas while achieving efficient coverage.

3. Implementation suggestions

1. Transmission line selection: According to the transmission distance and power requirements, reasonably select the constant voltage or low level transmission mode. For long-distance and high-power transmission, it is recommended to use 70V/100V constant voltage transmission.
2. Broadcast speaker layout: Follow the principle of segmented coverage to ensure that the sound field is uniform and the leakage sound attenuation meets the standard. Centralized or hybrid configuration solutions can be adopted for squares and large areas.
3. System maintenance and management: Regularly check the operating status of the equipment, focusing on monitoring the backup power supply and switching time of the emergency broadcast system. It is recommended to use a remote monitoring system to achieve intelligent management.

GB/T 50526-2021 history

• 2021 GB/T 50526-2021 Public broadcasting system engineering technical standards
• 2010 GB 50526-2010 Technical code for public address system engineering