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实用新型
CN205681435U 旅客列车数字音频系统 有权

旅客列车数字音频系统
摘要：
本实用新型涉及一种旅客列车数字音频系统，该数字音频系统包括广播主机、IP电话、IP对讲终端、多路IP解码终端、音频切换单元、功放输出单元和扬声器；广播主机、IP电话、IP对讲终端和多路IP解码终端之间通过以太网总线连接；广播主机、IP电话和音频切换单元之间通过模拟音频总线连接；多路IP解码终端输出端依次连接音频切换单元、功放输出单元和扬声器，该数字音频系统将数字音频总线传输与模拟音频总线传输相兼容，提高立车音频系统的灵活性和高效性；并通过音频切换单元的切换逻辑，按照有效标志位优先级，实现数字音频信号与模拟音频信号之间的无缝切换，确保列车广播对讲功能的可靠性。
摘要（英）：

The utility model relates to a passenger train digital audio system, this digital audio system is including broadcasting host computer, IP phone, IP talkback terminal, multichannel IP decode terminal, audio conversion unit, power amplifier output unit and speaker, broadcasting host computer, IP phone, IP talkback terminal and multichannel IP and decode and connect through ethernet bus between the terminal, pass through analog audio bus connection between broadcasting host computer, IP phone and the audio conversion unit, multichannel IP decodes final output end and connects gradually audio conversion unit, power amplifier output unit and speaker, and this digital audio system is compatible mutually with the total line transmission of analog audio with the total line transmission of digital audio, improvement merry go round machine audio system's flexibility and high efficiency, and it is logical through the switching of audio conversion unit, according to effective zone digit priority, realize the seamless handover between digital audio signal and the analog audio signal, ensure the train and broadcast the reliability of the function of talkbacking.

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