Pioneer Electronic Corporation

Ryuichi Todoroki

Takao Sawabe

Shigeru Watanabe

Kenichiro Hosoi

Yoshifumi Saeki

Nozomu Kikuchi

Takashi Sakakibara

Naruhiro Sato

A method of and a system for controlling a brightness of a picture displayed on a plasma display panel are provided which are capable of determining whether a video signal to be fed to the plasma display panel is a signal indicating a stationary picture, reducing the brightness of a picture displayed on the plasma display panel if it is determined that a video signal to be fed to the plasma display panel is a signal indicating a stationary picture.

Method of and system for controlling brightness of plasma display panel

A method of recording information on a video disk, includes the steps of: recording a video signal on the video disk; and recording table-of-contents data to control reproduction of the recorded video signal, on a plurality of frames in a lead-in area of the video disk. The table-of-contents data has a data structure, which is completed in each of the plurality of frames and is repeatedly identical in each of the plurality of frames adjacent to each other.

Method of recording and reproducing information on a video disk

A scrambling method for TV pictures avoids deterioration of the reproduced picture by level compressing only selected horizontal flyback portions according to a randomly selected pattern to prevent synchronization at the receiver. Key signals are added repetitively to a plurality of horizontal synch signals in one frame so as to enable descrambling of the picture at the decoder, even if noise or data error interferes with one or more of the signals.

Method for developing a key signal for descrambling in television

Growing community of inventors

Shizuoka-ken, Japan

Ryuichi Todoroki