Burr & Brown
Optical disk
 In an optical disk, data are recorded by using a hierarchical file structure in which a frame is composed of digitized data, a packet is composed of at least one frame, and a pack is composed of at least one packet. In this structure, the pack is composed of an integral number of packets, each packet being completed, and each of the packets is composed of an integral number of frames, each frame being completed. Therefore, there is no possibility that one frame is assigned over two or more different packets and one packet is assigned over two or more different packs. Since an integral number of frames are assigned in each packet, when a packet header is detected, reproduction of data can be carried out from the beginning of each packet. 
Matsushita Electric Industrial Co., Ltd.
G G G
G11B G11B G11B
additional inventional inventional
Ryoji Akihisa Masatoshi Yoshihiro
Suzuki Kawamura Shimbo Mori