Wegner, Cantor, Mueller & Player
Method of recording and reproducing picture information, recording medium, and recording medium playing apparatus
 Method of recording and reproducing picture information and a recording medium on which the picture information is recorded by the method, and an apparatus for playing such a recording medium. In addition to a coded information signal, graphic codes including picture information and audio codes made up of codes by which data can be compressed at a compression rate higher than that of the coded information signal. The graphic codes and said audio codes are inserted as the subcode of the coded information signal together with identification codes indicating whether the codes include the picture information or the audio information. At the time of playback of the recording medium, the subcode is demodulated in accordance with the identification codes. 
Pioneer Electronic Corporation
H G G H G
H04N G11B G11B H04N G11B
inventional inventional inventional inventional additional
Osamu Masami Junichi Masayasu
Watanabe Suzuki Yoshio Yamashita