Affiliations: Digital Broadcasting Research Group, ETRI, Korea | Korea Aviation University, Seoul, Korea Tel.: +82 42 860 1148; E-mail: [email protected]
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.
Keywords: DVB-RCS (two way satellite), MPEG-4, Data Carousel, PEP (Performance Enhancing Proxy) server