Development of variable bit rate disk system
Kentaro Yokouchi, Kenji Sugiyama, 光章 藤原, Kohji Tanaka, Shigeru Nemoto, Kazumi Iwata · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1995
CD size video disc employing the MPEGG2 system for recording moving pictures, is highly desired. However, it has been difficult to record a movie of more than 2 hours without causing a picture quality degradation. This problem has been resolved by the authors by applying a variable bit rate coding scheme. The variable bit rate coding scheme allows to allocate less codes to simple pictures and more to the portions that are needed. Therefore, a total generated code amount can be reduced with the adoption of the variable scheme, this allows to realize more flexible formats in recorded program length, which have not been possible before. This paper covers the coding, recording, and reproduction technologies of the newly developed disc system employing the variable bit rate coding scheme realized this time.