Matsushita Electric Industrial Co., Ltd.

Masatoshi Shinbo

Toshiyuki Kawara

Hiroshi Taniguchi

Kazuhiro Aoki

Akira Muto

Kaoru Iwakuni

Hideki Fujie

Disclosed is an information reproducing apparatus for reading out main information to be a target of reproduction and auxiliary information to control reproduction of the main information from an information recording medium containing the main information and the auxiliary information, and reproducing the main information according to the auxiliary information. This apparatus comprises reproduction restricting information extracting means for extracting reproduction restricting information used for reproduction restriction of a part or the whole of the read-out main information, from the read-out auxiliary information; reproduction restricting information used for deciding one of various modes of reproduction restriction including a mode in which reproduction restriction is not performed; and reproduction restricting means for performing reproduction restriction of a part or the whole of the read-out main information in the mode of reproduction restriction decided by the reproduction restriction decision means. Therefore, reproduction of information, which is recorded on an information recording medium such as an optical disk and available by reproduction, can be restricted in a desired mode, whereby the use of a software, such as a movie or a computer program, can be restricted.

Information reproducing apparatus for reproducing video signals and program information which are recorded in information recording media

In an audio and video recording apparatus, a video signal is separated into a luminance signal and a chrominance signal. The luminance signal is separated into low frequency and high frequency components. The high frequency component signal is subjected to balanced modulation to be thereafter band-compressed by interleaving the lower side band thereof to the low frequency component. The chrominance signal is processed to be a line sequential color difference signal. An audio signal is sampled and encoded. The luminance signal, the color difference signal and the audio signal are subjected to time-axis compression multiplexing in one frame with a synchronizing signal, address signals and control signals. The multiplex signal is recorded on a recording medium.

Apparatus for recording audio signals and video signals on a recording

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Minooshi, Japan

Masatoshi Shinbo