A Real-Time IMT-2000 Audio Transmission System

Takeshi Mori, Takao Kaneko, Takehiro Moriya, Kazunaga Ikeda

Research output: Contribution to journalArticlepeer-review


For real-time audio streaming services over nextgeneration mobile phone systems, such as live concert broadcasting and radio relaying, we have developed a realtime IMT-2000 audio transmission system. This system consists of a real-time encoder and a portable real-time decoder, which are both based on fixed-point DSP chips. TwinVQ technology is used for audio compression, and a scheme to protect audio data against bit-errors was designed based on error sensitivity observations. Selfsynchronization and adaptive error concealment are carried out at the decoder. We confirmed that the system can transmit high-quality stereo audio samples at 32 kHz with a total bit rate of 64 kbit/s over a simulated IMT-2000 channel. We also checked that this system can connect to a real IMT-2000 experimental network, and found that it is easily applicable to various audio streaming services.

Original languageEnglish
Pages (from-to)860-866
Number of pages7
JournalIEEE Transactions on Consumer Electronics
Issue number4
Publication statusPublished - 2001 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering


Dive into the research topics of 'A Real-Time IMT-2000 Audio Transmission System'. Together they form a unique fingerprint.

Cite this