Performance enhancement of MPEG-4 DVB-RCS in two way satellite environments

  • Authors:

  • Nam-kyung Lee;Soo-hoan Chae;Ho-jin Lee;Deock-gil Oh

  • Affiliations:

  • Digital Broadcasting Research Group, ETRI, Korea;Korea Aviation University, Seoul, Korea Tel.: +82 42 860 1148/ E-mail: nklee@etri.re.kr;Digital Broadcasting Research Group, ETRI, Korea;Digital Broadcasting Research Group, ETRI, Korea

  • Venue:
  • Space Communications - Satellite Network Protocols
  • Year:
  • 2005

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Abstract

Each object in an MPEG (Moving Picture Experts Group)-4 video data stream can be managed independently by using object-oriented coding. An object is composed of an ES (Elementary Stream) and transmitted through a DMIF (Delivery Multimedia Integration Framework) layer. Digital Video Broadcasting (DVB) can be improved or enhanced in reliability, usability and compatibility by cyclic retransmission to a Data Carousel Return Channel via Satellite. This paper describes a cooperative system of MPEG-4 and DVB-data carousel that uses descriptors. The cooperative system works on two-way satellite environments. MPEG-4 clients can receive the data of DVB-data carousel, with the greater flexibility in representation of information inherent in MPEG-4. Further performance enhancement is achieved through use of a PEP (Performance Enhancing Proxy) server. Experimental results show significant improvement in data throughput.