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2. 发明申请

US20050008030A1 Procedure for exchanging useful information generated according to different coding laws between at least 2 pieces of user terminal equipment 审中-公开
标题翻译：用于根据不同编码规则在至少2台用户终端设备之间交换有用信息的过程
公开(公告)号：US20050008030A1
公开(公告)日：2005-01-13
申请号：US10497112
申请日：2002-11-13
申请人： Klaus Hoffmann , Sven Sabrowski , Jean-Marie Stupka
发明人： Klaus Hoffmann , Sven Sabrowski , Jean-Marie Stupka
IPC分类号： H04M3/00 , H04J3/16 , H04L29/06 , H04Q3/00
CPC分类号： H04L65/1043 , H04L65/103 , H04M7/0072 , H04M7/122 , H04M7/123
摘要： If TDM connections are through-connected from the originating TDM network to the target TDM network via a data network in the form of backbone, e.g. VoIP, the switchover between the TDM network and the data network takes place via media gateways. As is the case with connections exclusively between TDM, the coding algorithms of the A face and the B face have to be identical. In TDM networks, coding is done according to A Law and μ Law. When switching from an A Law network to a μ Law network, the coding specifications have to be converted. In order to carry out a conversion in a TDM environment, at the switchover point the μ Law face has to convert to A Law. The same applies to VoIP. The invention relates to the integration of this switchover conversion rule in the codec negotiation procedure so that in principle a μ Law A face offers μ Law and, alternatively, A-Law to the B face; a μ Law B face accepts μ Law whereas an A-Law B face acknowledges A-Law. Furthermore, 64 kBit/s unrestricted preferred connections are considered in fall back mode, wherefore an additional logic is integrated into the codec modification procedure by means of which in principle μ Law and, as an alternative, A-Law are offered to the B face in addition to the transparent CODEC or instead of offering a μ Law A face to the TMR only. The B face first accepts the transparent CODEC on the basis of the list or the TMR ‘64 kBit/s unrestricted preferred’. When receiving the TMU, the B face selects the Codec to satisfy the code conversion rule.
摘要翻译：如果TDM连接通过主干形式的数据网络从始发TDM网络直接连接到目标TDM网络。 VoIP，TDM网络和数据网络之间的切换通过媒体网关进行。像TDM之间的连接一样，A面和B面的编码算法必须相同。在TDM网络中，根据A法和mu法进行编码。从A法网络切换到法律网络时，必须对编码规范进行转换。为了在TDM环境中进行转换，在切换点，“法律”面必须转换为“A法”。这同样适用于VoIP。本发明涉及该切换转换规则在编解码器协商过程中的整合，从而原则上，法律A面提供了mu法，或者对于B面提供A律; 一个法律B面接受法律，而一个A法B面承认了A律。此外，在倒退模式中考虑了64kBit / s的无限制优选连接，因此在编解码器修改过程中集成了一个额外的逻辑，通过该逻辑原理，将μA律和作为替代的A律提供给B面除了透明的CODEC之外，也可以不是仅向TMR提供mu法A。 B面首先基于列表或TMR '64 kBit / s不受限制的首选项接受透明CODEC。当接收到TMU时，B面选择编解码器来满足代码转换规则。

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