一种全光网络广播系统

Abstract

本实用新型涉及公共广播设施领域，具体涉及一种全光网络广播系统，包括广播服务器、核心光交换机以及若干光接口数字扬声器终端，所述广播服务器与所述核心光交换机信号连接，所述核心光交换机用于构建全光传输环网网络，所述核心光交换机通过传输光缆与各所述光接口数字扬声器终端信号连接，相邻所述光接口数字扬声器通过所述传输光缆串联形成闭合的光纤环网，光纤环网的末端与所述核心光交换机信号连接以构成环网冗余。有益效果在于：本实用新型通过采用数字流媒体信号进行全数字化的音频处理和光通信传输直接进入数字扬声器，消除模拟信号在长距离铜缆传输中的损耗和传统网络接口的可靠性问题，保证广播系统远近端音质的高度一致性和高保真度。

Claims

1. An all-optical network broadcasting system, characterized in that, The system includes a broadcast server (1), a core optical switch (4), and several optical interface digital speaker (6) terminals. The broadcast server (1) is connected to the core optical switch (4) via a signal. The core optical switch (4) is used to construct an all-optical transmission ring network. The core optical switch (4) is connected to each of the optical interface digital speaker (6) terminals via a transmission optical cable (5). Adjacent optical interface digital speakers (6) are connected in series via the transmission optical cable (5) to form a closed optical fiber ring network. The end of the optical fiber ring network is connected to the core optical switch (4) via a signal to form ring network redundancy. The optical interface digital speaker (6) terminal integrates a dual optical ring network interface (601). The dual optical ring network interface (601) is equipped with two independent industrial-grade single-mode SFP optical modules for receiving and transmitting optical signals. The two sets of SFP optical modules support wavelength division multiplexing and dual fiber loop respectively.

2. The all-optical network broadcast system of claim 1, wherein, It also includes a front-end source device (2), which is signal-connected to the broadcast server (1). The front-end source device (2) is used to provide analog or digital audio sources. The front-end source device (2) includes at least one of a microphone, a tuner, a CD player, and a computer digital audio device.

3. An all-optical network broadcast system according to claim 1 or 2, characterized in that, It also includes a fire broadcast linkage interface (3), which is connected to the broadcast server (1) by signal. The fire broadcast linkage interface (3) is used to receive the fire alarm system trigger signal and trigger the broadcast server (1) to play the preset fire evacuation voice at the highest priority.

4. The all-optical network broadcast system of claim 3, wherein, It also includes a convergence switch (7), the first signal terminal of which is connected to the broadcast server (1) and the second signal terminal of which is connected to the core optical switch (4). The convergence switch (7) is used to realize signal communication with external business systems. The external business systems include at least one of the following: a platform train timetable system for rail transit, an automatic train signal system, an integrated monitoring system, and a secondary control system of the control center.

5. The all-optical network broadcast system of claim 4, wherein, It also includes an optical cable patch panel (8), which is located between the core optical switch (4) and the optical interface digital speaker (6) terminal. The core optical switch (4) is connected to the transmission optical cable (5) via the optical cable patch panel (8). The optical cable patch panel (8) is used to distribute the multi-channel optical jumpers output by the core optical switch (4) to the ring network link (9) where each of the optical interface digital speaker (6) terminals is located via optical cable. The working wavelengths of the two industrial-grade single-mode SFP optical modules are 1310nm and 1550nm, respectively.

6. The all-optical network broadcast system of claim 5, wherein, The transmission optical cable (5) is a multi-core armored single-mode optical cable or an optoelectronic composite cable, and the outer sheath of the multi-core armored single-mode optical cable is made of low-smoke halogen-free material.

7. The all-optical network broadcast system of claim 1, wherein, The optical interface digital speaker (6) terminal also integrates an audio processing unit, which includes a digital signal processor and a Class D digital power amplifier. The digital signal processor is used to implement at least one of the functions of broadcast voice clarity processing, audio equalization, delay and wireless broadcast echo suppression. The Class D digital power amplifier is used to drive the speaker to produce sound.

8. The all-optical network broadcast system of claim 7, wherein, The optical interface digital speaker (6) terminal also integrates an environmental noise detection module and a dynamic volume adjustment module; the environmental noise detection module is signal-connected to the dynamic volume adjustment module, the environmental noise detection module is used to collect environmental noise signals, and the dynamic volume adjustment module is used to adjust the broadcast volume according to the environmental noise signals to realize closed-loop automatic control of environmental noise volume.

9. The all-optical network broadcasting system according to claim 8, characterized in that, The optical interface digital speaker (6) terminal is provided with an extended constant voltage output interface, which is connected to the extended constant voltage speaker (10) for outputting constant voltage audio signals to the extended constant voltage speaker (10).

10. The all-optical network broadcast system of claim 9, wherein, The optical interface digital speaker (6) terminal also has a built-in wireless broadcast receiving unit and a power supply unit. The power supply unit is powered by an optical-electric composite cable or by an AC power line through which the terminal is installed.

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