HD DVD Spec from 1997!

[Josh]

Green lasers? Doubled sided? 1125 scanning lines?

Sorry, I just stumbled on this and didn't know if it had been posted before.

The high-definition DVD system developed by Toshiba has 1,125 scanning lines and can store and play back more than 130 minutes of theater-quality images on a 120mm optical disc. Key technologies employed in the system are high-density mastering technology to form submicro-pits on a disc; a pick-up head that uses a green second harmonics generation (SHG) laser to read out the signals from these pits; a data transfer rate more than double that of conventional DVDs; and MPEG2 image compression and decompression technology for high-definition images. These technologies are used to realize the large capacity of 7.5Gbytes per side, or 1.6 times that of DVD, and faithful real-time reproduction of high-definition images with four times the amount of video data of DVD.

Toshiba plans to increase disc capacity to 15Gbytes per side to fit more than 130 minutes of playback time of high-definition images on a single side of a disc by the beginning of the twenty-first century.

http://www.toshiba.co.jp/tech/review...d/d5/index.htm