Yoshihiko Morita

Hi-vision optical video disc

The formats of the four signals recorded on the high definition optical video disk system are discussed. The first signal is a video carrier FM-modulated with a bandwidth-compressed signal for use in HDTV broadcasting through a satellite. The second is a pilot signal for turntable motor control and jitter compensation. The other two consist of PCM stereo sound, one using time-division and the other frequency-division multiplexing. The resulting disk offers high-definition pictures and high-fidelity sound, and has a playing time of 60 minutes (total for both sides). >

3D HDTV video disc system

A hi-vision three-dimensional system with two MUSE videodisc players and a 6-tube-type projector called hi-vision, has been developed. Using the hi-vision picture, excellent three-dimensional video pictures can be presented on large-scale screens. The two videodisc players enable synchronized replaying to reproduce three-dimensional images. A 6-tube-type projector with two-way RGB input is adopted for display. By using laser discs, long-time consecutive video replay is possible. In case of replaying without three-dimensional characteristics, long-term replay or repeated replay of two different hi-vision programs can be presented by operating the two players alternately. >

Baseband Hi-Vision Video Disc.

ディスクの両面を同時に, 2個のピックアップで読取る両面同時再生方式を開発し, CLV (Constant Linear Velocity) ディスク1枚で, 連続再生時間30分のべースバンドハイビジョンビデオディスクおよびプレーヤを実現することができた.

High-density HDVD system using visible laser diode

We have presented a high density MUSE videodisc with 60 minutes of playback time per side. It has been developed by doubling the disc recording density. We have continued examining the system mainly the optical pickup and the signal parameters and we determined the newly specifications. To reduce the influence of uneven thickness and tilt of disc we changed an N. A. of the objective lens to 0. 55 and to make the optical pickup smaller we employed a small packaged (

Stereoscopic video disc record and recording and reproducing apparatus therefor

5. 6mm) visible laser diode. The visible laser diode has a low aspect ratio ( 0 32 0 11 0 / 0 2. 9 ). And to make the SN ratio of the playback signal higher we widened the FM deviation and lowered the FM carrier frequency. Under new conditions we made PMMA replica discs. As a result a high quality played back image without crosstalk noise was obtaind. 1.