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    • 9. 发明申请
    • METHOD AND SYSTEM FOR TRANSCODING AVOIDANCE IN BORDER GATEWAYS
    • 在边界网关中避免逃避的方法和系统
    • WO2009089953A1
    • 2009-07-23
    • PCT/EP2008/066064
    • 2008-11-24
    • Nokia Siemens Networks OyGOLDSTEIN, Peter
    • GOLDSTEIN, Peter
    • H04L29/06
    • H04M7/0072H04L65/10H04L65/1016H04L65/103H04L65/1043H04L69/24
    • The architecture framework for Next Generation Network NGN, as defined by ITU-T and ETSI, includes border gateways (BGW) to connect different networks of different network providers or to connect access networks to the core network. Based on bilateral agreement a specific codec is used in the interconnecting network or a specific codec may be used in the core network independent of the codec used in the access network, respectively. If the two IP end devices do have a common codec, the problem of unwanted transcoding arises, which leads to additional delay and reduces the audio quality caused by converting one coding scheme into another coding scheme. In order to avoid unnecessary transcoding, an information element (12) is introduced which contains the result of an end-to-end negotiation on common codecs.
    • 由ITU-T和ETSI定义的下一代网络NGN的架构框架包括连接不同网络提供商的不同网络的边界网关(BGW),或将接入网络连接到核心网络。 基于双边协议,在互连网络中使用特定的编解码器,或者独立于接入网络中使用的编解码器,可以在核心网络中使用特定的编解码器。 如果两个IP端设备确实具有通用的编解码器,就产生不想要的代码转换的问题,这导致额外的延迟并且通过将一个编码方案转换成另一个编码方案而降低了音频质量。 为了避免不必要的代码转换,引入了包含公共编解码器端到端协商结果的信息元素(12)。