High Quality VoIP System

2 References

Bibliographic Information

Other Title
  • 高品質VoIPシステム

Search this article

Description

This paper describes a high quality VoIP (Voice over Internet Protocol) systems over high speed radio communication. These systems utilize a super-wideband speech codec which operates at the sampling rate of 22.05kHz and more, and the bit rate of 48k-64kbit/s. This exhibit consists of VoIP systems with smartphones over the wireless LAN (IEEE802.11b) and with laptop PCs over HSDPA (High Speed Downlink Packet Access) and UDI (Unrestricted Digital Information) channels of the 3^<rd> generation mobile communication. The systems provide users with much more comfortable listening environment and more presence than conventional narrowband phone calls. They are applicable to premise IP-Telephony and conference call. Further more, they are also applicable to the phone-call on mobile terminals over the next generation mobile communication.

Journal

  • IEICE technical report

    IEICE technical report 107 (446), 89-90, 2008-01-17

    The Institute of Electronics, Information and Communication Engineers

References(2)*help

See more

Keywords

Details 詳細情報について

  • CRID
    1573668927101534464
  • NII Article ID
    110006613987
  • NII Book ID
    AA1154676X
  • Text Lang
    ja
  • Data Source
    • CiNii Articles

Report a problem

Back to top