三方语音会议系统的设计与实现

发布时间：2018-03-02 16:45

本文选题：语音网关　切入点：VOIP通话　出处：《华中科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：语音网关作为连接传统PSTN网络与廉价IP网络的中间设备,满足了企业内部语音通话的需求,并为其节省了大量的成本。然而,普通的语音通话,并不能满足人们通话中丰富的业务需求。由此,实习公司的语音网关产品已实现呼叫等待、呼叫保持、呼叫转接和多方保持等业务特性。而此次实现的三方会议业务使得该语音网关产品获得更大的市场竞争力。三方会议业务是为了满足企业内部多方会话的需求而提出的业务,它需要配合平台其它相关业务来完成,例如呼叫等待、呼叫保持、多方保持业务等等。由于硬件资源受限,一个语音网关暂时只支持三方通话语音数据的混合处理。但它可以通过多个语音网关的级联,来实现多方会话的功能。实习公司的语音网关具有良好的语音模块架构,它包括呼叫管理中心、拨号策略模块、媒体控制模块和协议模块等,本论文设计的语音业务是在其基础上设计开发的。本项目实现的难点在于,它需要配合平台已有语音业务来设计实现。它需要尽可能复用已有的语音业务,并且需要无误差的兼容他们的功能。另外,三方会议级联功能的设计也是难点之一。本系统实现的三方会议业务不对PSTN网络和IP网络进行区分,使得系统应用场景更加丰富。实验结果证明,不同编解码的语音数据都能在本系统里进行很好的混音,不同业务之间都能很好的在一起配合工作。
[Abstract]:Voice gateway, as an intermediate device to connect traditional PSTN network and cheap IP network, meets the needs of internal voice call in enterprises and saves a lot of cost. This does not meet the rich business needs of people in calls. As a result, the intern voice gateway product has achieved call waiting, call retention, Call transfer and multi-party maintenance, etc. The three-party meeting service realized this time makes the voice gateway product more competitive in the market. The tripartite meeting service is proposed to meet the needs of multi-party conversation within the enterprise. It needs to be completed in conjunction with other related services of the platform, such as call waiting, call retention, multi-party maintenance, etc. Due to hardware resource constraints, For the time being, a voice gateway only supports the mixed processing of three-party voice data. However, it can realize the function of multi-party conversation through the cascade of multiple voice gateways. It includes call management center, dial-up strategy module, media control module and protocol module, etc. The voice service designed in this paper is based on the call management center, dialing strategy module, media control module and protocol module. It needs to be designed and implemented in conjunction with existing voice services on the platform. It needs to reuse existing voice services as much as possible, and error-free compatibility with their functions. The design of three-party meeting cascading function is also one of the difficulties. The three-party meeting service realized in this system does not distinguish the PSTN network from the IP network, which makes the application scene of the system more abundant. The experimental results show that, The speech data of different coding and decoding can be mixed well in this system, and the different services can work well together.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN948.63

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