语音会议——如何让更多人通话？
首先，我只是一个业余爱好者，所以如果这是一个愚蠢的问题或者我太天真，我很抱歉。 （这也意味着我无法购买昂贵的库）
情况是这样的：我正在 C#.NET 中构建一个简单的语音聊天应用程序（类似于 Ventrilo 或 TeamSpeak，但仅适用于大约 15 或 20 人，并以 100Mbps 运行）局域网）。我有工作服务器（为每个客户端生成线程）和客户端应用程序，使用 UDP 进行连接，使用 DirectSound 捕获和播放声音。我可以进行“一对一”通话，但我无法弄清楚最重要的事情之一：
如何让两个以上的人参与对话？
first of all, I'm just a hobbyist, so I'm sorry if this is dumb question or if I'm being too naive. (It also means that I can't buy expensive libraries)
This is the situation: I'm building a simple voice chat application in C#.NET (something like Ventrilo or TeamSpeak but only for about 15 or 20 people, and running on 100Mbps LAN). I have working server (spawning thread for each client) and client application using UDP for connection and DirectSound for capturing and playing the sound. I can make "1 on 1" calls but I can't figure out one of the most important things:
How do i have more than two people in the conversation?
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您需要一些集中的位置通过多播将数据包发回，否则您需要一种分散的方法，其中每个客户端都连接到其他每个客户端，并且每个客户端都托管多播。您想要避免的是让机器将其数据转发到所有其他机器，这将导致向每台机器发送消息的时间为 O(n)（并且 I/O 很慢！）。
无论哪种情况，您最终都会遇到同样的问题：如何组合音频流。实现此目的的一种简单机制是在将信号发送回（从网络端口或扬声器发送）之前按位或将信号组合在一起，但这假设您可以访问非压缩且合理同步的流。
You need some centralized place to send the packets back out via a multicast, or else you need a decentralized approach where every client is connected to every other client, and each client is hosting a multicast. What you want to avoid is making the machines forward out their data to every other machine, which would result in O(n) time to send a message to each machine (and I/O is slow!).
In either scenario, you end up with the same problem: how to combine the audio streams. One simple mechanism to accomplish this is to bitwise-or the signals together before you send them back out (either out the network port, or out to your speakers), but this assumes you have access to non-compressed and reasonably-synchronized streams.