MPEG-2 real-time software CODEC for full-duplex transmission application over IP networks

Hiroe Iwasaki, Jiro Naganuma, Makoto Endo, Yoshiyuki Yashima

Research output: Contribution to journalArticlepeer-review


This paper proposes a real-time MPEG-2 software CODEC for full-duplex transmission applications, and evaluates its performance and usefulness. The CODEC consists of a high-speed encoder/decoder, an IP sender/receiver, and an error recovery controller. Each encoder/decoder is accelerated and optimized by exploiting fast algorithms and instruction-level parallelism. The IP sender/receiver combination achieves low delay owing to the direct translating of each elementary stream of video and audio into UDP/IP packets. The error recovery controller carries out simple but powerful error tolerance against packet loss over IP networks. This CODEC attains low delay of 99 ms (M = 1, N = 1) to 165 ms (M = 3, N = 3) including input, encoding, transmitting, decoding, and output delays, and maintains a normal frame rate of 30 fps (frames per second) and more than 20 fps even under a fairly heavy network load. It provides sufficiently good performance for use as a real-time full NTSC-size CODEC on a PC of at least 1.2-GHz CPU.

Original languageEnglish
Pages (from-to)33-41
Number of pages9
JournalSystems and Computers in Japan
Issue number2
Publication statusPublished - 2005 Feb
Externally publishedYes


  • IP networks
  • Real time
  • Software

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Information Systems
  • Hardware and Architecture
  • Computational Theory and Mathematics


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