A HIGH-QUALITY VBR MPEG SYSTEM FOR INTERNET AND BROADCASTING APPLICATIONS

A high quality variable bit rate (VBR) MPEG-2 encoding scheme that off ers optimum video quality and bandwidth allocation is presented. This scheme utilizes a real-time bit redistribution method, insertion of I frames at scene changes and large GOP size to produce high picture qua lity. An encoders-bank with predetermined sets of ''nominal-long-term' ', minimum and maximum bit rates in combination with sophisticated pic ture quality control process allows a bit rate selector to choose the optimum bit stream from a set of encoders, thus resulting in a high qu ality VBR video stream. The proposed scheme is very easy to implement and offers an efficient real-time VBR solution for broadcasting applic ations that involve multiplexed distribution of multiple video sources .