LaserVision Demonstration II Part 2 

Thanks for the compliments though! Archival broadcast videotape transfer is one of my specialties, and I'm always amazed at how nice old analog formats can look.

Prior to DVD; LaserDisc was the only format that offered the most NTSC resolution available on the home market; using 420 lines of NTSC's 480 active. Even broadcast NTSC only went up to 380 lines. I'm actually impressed at how well the videotape came out.

SMPTE Type C only had 330 lines of resolution. Outstanding cleanup job.

LOL! I never miss a chance to watch 1980's video technology, especially when Japanese bossa nova music is involved! LOL!!

I'd also foregotten LD used heterodyne color; the reason likely being to keep the system a bit more simplistic. Rather than the complex conversion circuitry; the signal could be demodulated off the disc and piped to composite or modulated. That being said; with proper conversion to 1080p; they look outstanding.

The 240p system is actually a pretty slight modification to NTSC. In standard NTSC, 525 lines make up a full frame, so the two fields are made up of 262.5 lines each. Because of this, one of the two field starts in the middle of a line, offsetting the fields to create an interlaced frame. In the "double-strike" system, the frame is made up of an even number of lines (524 or 526). This causes the lines to overlap, halving the vertical resolution. It's sort of compatible low-res progressive.

I'm surprised Laserdisc has such a nice picture. High Definition of its time before DVD and Blu-Ray

i have a copy of this thats why im here now , was checkin to see what was on it

You're right. I was getting those confused; I always do. I haven't spoken TVL on a regular basis in a LONG time..it's all digital resolutions now. Although; this does not explain the 240p "double-strike" standard that's part of NTSC; but was not allowed to be broadcast. Vintage game consoles output non-standard NTSC; old TV's and some LCD's handle it; but my home theater receiver doesn't.

No worries. That way of thinking of resolution is pretty much obsolete now, and I'm just wrapping my mind around it myself.

Not quite... I think you're getting horizontal resolution mixed up with vertical. NTSC always has exactly 525 lines with 480-486 active. For video to be compatible with the system, it must conform to this. Laserdisc, type C, and even VHS all do. The difference between them is in horizontal resolution, where the bandwidth is limited for both chrominance and luminance information. When LDs are described as having 420 lines of resolution, they're talking about horizontal resolution, not vertical.

Somebody done an upscaled high seg version?

SMPTE C, unlike Laserdisc, VHS, Betamax, etc., is not a heterodyned format. The entirety of the 4.2 MHz NTSC signal is modulated and recorded to tape. Therefore, there is no real loss in resolution from the original source, making it a true broadcast quality format. Home formats (LD included) use heterodyne color, meaning the 3.58 MHz color frequency must be reduced (400-900 KHz depending on format), resulting in a major loss of horizontal resolution. Type C was by far the best analog format.