A NEW METHODOLOGY FOR IMPLEMENTING COMPRESSED' VIDEO INTERACTIVE OPERATIONS OF MPEG-2
Kostas E. Psannis, Marios G. Hadjinicolaou · 2001
We present an efJicient approach for supporting operations such as Fast Forward (FF) and Fast Rewind (FR) in MPEG-based Interactive Video On Demand (IVOD) system. This approach is based on transmitting additional data of the same movie from the server to the Digital Storage Device (DSD) at a client station. The special additional data consists of Elementary Stream (ES) which has all I frames. The interactive data is generated from the storage at the server every n-th frame from the original MPEG-2 compressed video. During the appropriate procedure the server can pe@orm the FF/FR data in a Group of Pictures (GoPs) structure in an independent fashion. Fast Forward (FF) and Fast Rewind (FR) operations are supported using much or little extra network bandwidth than that is already allocated for normal playback. Assuming that the decoder consumes data at the constant rate of normal playback and the data transferred over the network with the average bit rate, then the number of supported speedups we can achieve depends on the Group of Pictures Lengths (N) and the recording ratio during the normal play. Keyword: Speedups, Playback Rates, Consumption Speed, MPEG-2, Fast Forward, Fast Rewind, Interactive Video On Demand (IVOD).