HD DVD Spec from 1997! - Blu-ray Forum

Josh · 06-04-2008, 08:07 PM

Green lasers? Doubled sided? 1125 scanning lines?

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

Quote:

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

Go Blue · 06-04-2008, 08:10 PM

theknub · 06-04-2008, 08:14 PM

something seems oddly familiar :P

Beta Man · 06-04-2008, 08:23 PM

Quote:

Originally Posted by Josh

Green lasers? Doubled sided? 1125 scanning lines?

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

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

They even show how you have to put it in the microwave

Uxi · 06-04-2008, 08:23 PM

Bwahahaha.

Oh noes, MPEG2?

Driver_King · 06-04-2008, 08:28 PM

Toshiba is constantly up there with failed technologies!

Nerdkiller likes BD · 06-04-2008, 08:29 PM

Only up to 15 gigs on a dual layer disc? But how will I get my lossless sound? I got it, HD DVD...wait, it can't do that either, DAMMIT!!!

Chevypower · 06-04-2008, 10:19 PM

1125 lines is correct. We used to measure the total horizontal lines which includes about 50 or so extra lines of black line (no picture) which includes closed captioning and other things.
Gross resolution lines: PAL = 625, NTSC = 525, HD = 1125 These days we tend to only measure the net resolution. 480 NTSC, 576 PAL, 1080 HD

I believe the gross resolution only applies to analog transmissions, which makes those former numbers obsolete, with current digital transmission. When you adjust the Vertical Hold on the older TVs you saw those 50 lines of black as the picture scrolled.

jadedeath · 06-04-2008, 11:55 PM

What's HD-DVD?

Someone call Ken Graffeo and ask...

Logan

tron3 · 06-05-2008, 01:50 AM

Up to 4 x the space of stadard DVD, it says. Les'see here, dvd is 4.7 GB x 4 = 18.8.

Yet HD DVD was 15 GB. Wow, they really did want the cheapest thing for the consumer!

I have said this before. You can see from my join date I have known about the format war since before either machine was even out. TWICE I had found the same site which stated HD DVD was a 720P format.

They went to 1080p to compete with blu-ray, no doubt. But that is not what Toshiba would have given us if there was no blu-ray.

I wouldn't know how to find that site today.

WickyWoo · 06-05-2008, 02:37 AM

Don't forget this was a 720p format as well

jd213 · 06-05-2008, 02:42 AM

1125 scanlines is the equivalent of 1080i/p. 720p would be 750p in analog scanlines.

w_tanoto · 06-06-2008, 03:14 PM

Quote:

Originally Posted by schultz

+1
useless toshiba. BDA has developed better tech

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06-04-2008, 08:10 PM	#2
Go Blue Blu-ray Knight Top ranked HT gallery Member since:Jul 2007 Home Theater Gallery:23 Blu-ray collection:160 Trading Score:7

06-04-2008, 08:14 PM	#3
theknub Blu-ray Guru Member since:May 2006	something seems oddly familiar :P

06-04-2008, 08:23 PM	#5
Uxi Blu-ray Ninja Member since:Aug 2007 Location:Southern California 4K collection:14 Blu-ray collection:191 Blu-ray reviews:9	Bwahahaha. Oh noes, MPEG2?

06-04-2008, 08:28 PM	#6
Driver_King Blu-ray Ninja Top contributor Member since:Jan 2008 Location:Tampa Bay, Florida Home Theater Gallery:96 Blu-ray collection:28 Trading Score:10	Toshiba is constantly up there with failed technologies!

06-04-2008, 08:29 PM	#7
Nerdkiller likes BD Blu-ray Knight Top contributor Member since:Jan 2008 Location:Wrestling in Ireland. PSNetwork: Nerdkiller316PSN Nerds beaten up: Loads 4K collection:75 Blu-ray collection:880 Trading Score:1	Only up to 15 gigs on a dual layer disc? But how will I get my lossless sound? I got it, HD DVD...wait, it can't do that either, DAMMIT!!!

06-04-2008, 10:19 PM	#8
Chevypower Special Member Member since:Feb 2008	1125 lines is correct. We used to measure the total horizontal lines which includes about 50 or so extra lines of black line (no picture) which includes closed captioning and other things. Gross resolution lines: PAL = 625, NTSC = 525, HD = 1125 These days we tend to only measure the net resolution. 480 NTSC, 576 PAL, 1080 HD I believe the gross resolution only applies to analog transmissions, which makes those former numbers obsolete, with current digital transmission. When you adjust the Vertical Hold on the older TVs you saw those 50 lines of black as the picture scrolled.

06-04-2008, 11:55 PM	#9
jadedeath Blu-ray Knight Member since:Jun 2007	What's HD-DVD? Someone call Ken Graffeo and ask... Logan

06-05-2008, 01:50 AM	#10
tron3 Blu-ray Samurai Member since:Aug 2004 Location:New Jersey Blu-ray reviews:3	Up to 4 x the space of stadard DVD, it says. Les'see here, dvd is 4.7 GB x 4 = 18.8. Yet HD DVD was 15 GB. Wow, they really did want the cheapest thing for the consumer! I have said this before. You can see from my join date I have known about the format war since before either machine was even out. TWICE I had found the same site which stated HD DVD was a 720P format. They went to 1080p to compete with blu-ray, no doubt. But that is not what Toshiba would have given us if there was no blu-ray. I wouldn't know how to find that site today.

06-05-2008, 02:37 AM	#11
WickyWoo Blu-ray Champion Member since:May 2007 Trading Score:2	Don't forget this was a 720p format as well

06-05-2008, 02:42 AM	#12
jd213 Special Member Member since:Sep 2007 Location:less than 10 minutes from Akihabara	1125 scanlines is the equivalent of 1080i/p. 720p would be 750p in analog scanlines.

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