Title:
少なくとも2つの加入者端末装置間において異なる符号化規則に応じて形成された有効情報における符号化の確定方法
Document Type and Number:
Japanese Patent JP2004518388
Kind Code:
A
Abstract:
If TDM connections are typically switched through from origination TDM network to a target TDM network by way of a data network as the backbone (ATM or IP) (e.g. VoIP). The transitions between the TDM network and the data network go through media gateways. In pure TDM connections, the coding laws of the A side and the B side are identical. In TDM networks, there is coding according to "A-Law" (PCM30 networks) and "mu-Law" (PCM24 networks). In the transition from an A-Law network to a mu-Law network, the coding law has to be changed. In the "TDM" world, the conversion rule is that at the transition the mu-Law side converts to the A-Law. In the ATM and IP transmission networks now being formed, this is no longer a requirement. Therefore the invention establishes that transcoding can take place in both network types by carrying out this transcoding in the target network. In this connection, the result of the codec negotiation procedure (if it is used) is taken into consideration; i.e., transcoding takes place only if the G.711 codec is selected.
Inventors:
Jean-Marie Stupka
Sven Zabrovsky
Klaus Hoffmann
Sven Zabrovsky
Klaus Hoffmann
Application Number:
JP2002565368A
Publication Date:
June 17, 2004
Filing Date:
January 29, 2002
Export Citation:
Assignee:
Siemens Aktiengesellschaft
International Classes:
H04B14/04; H04L29/06; H04M3/00; H04Q3/00; H04L12/66; (IPC1-7): H04B14/04; H04L12/66; H04L29/06; H04M3/00
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel