Pioneer Electronic Corporation

Toshiyuki Amaya

Sumio Hosaka

Takao Yamada

Satomi Sudo

Toshiji Daito

Takumi Jinguji

Hiroshi Itoh

Hisashi Hoda

Kuniaki Siratori

A method of recording N-channel video signals and M-channel audio signals (N, M being natural numbers) includes the steps of periodically extracting the video signal for one unit period, thereby thinning out the video signal, for each of the N-channel video signals, in turn combining the extracted video signals by a time division multiplexing operation. The method also includes the step of coding each of the M-channel audio signals to form M code trains, compressing in time each of the M code trains by a factor of 1/M or less and dividing each of the M code trains into a plurality of blocks, successively combining each block from the M code trains by a time division multiplexing operation. The video and audio signal obtained by the above multiplex operations are recorded on a single recording medium.

Method of recording and reproducing multi-channel information on and

A method and apparatus for controlling a visual data playback apparatus such as a video disc player whereby control is executed in response to input commands which are generated by scanning a printed code, e.g. bar code, on a document to produce code signals which are supplied to the control apparatus of the invention. Portions of the code are positioned close to respective sections of a printed document, so that a user can cause moving or still images relating to a document section to be produced on a monitor display, without the need for the user's eyes to move away from the document being read, e.g. to operate a separate control unit.

Method and apparatus for interactive control of a data recording medium

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Tokorozawa, Japan

Toshiyuki Amaya