Omndiagonal Serialization and Monitor Design

ClearEdge VM wideband velocity modulation improves the definition at picture edges, creating sharper images by slowing the CRT (cathode-ray tube) beam's horizontal scanning during demanding work--say, when rendering transitions from light to dark parts of an image--and speeding it up when scanning easily rendered sections, like broad dark areas.

So it seems there are some possiblities for other than standard constant velocities in raster scanning.

Doug Goncz Replikon Research Falls Church, VA 22044-0394

I would do this by running the sync signals into the line inputs and writing a program to synchronize wave outputs or perhaps MIDI outputs to the amp if it there were any reason to keep the hardware compact and PC based. There would be some drift and constant correction because the video and audio use separte clock crystals.

Doug Goncz Replikon Research Falls Church, VA 22044-0394

It will require less hardware. The drive for H and V is the same circuitry operating at the same potentials. A conventional audio amp can be used for drive.

Phase requirements can eventually be met to provide a clear picture.

The method *is* a raster method; the subblocks are not scanned. (In an image processing analysis, I scanned the subblocks and applied transforms. Good results comparing conventional sawtooth raster, full raster diagonal, and sub-block diagonal at ftp://users.aol.com/DGoncz)

If PowerStrip's flexbility is any indication, random adapters will work with random monitors. Note that such a diagonal monitor is capable of a nearly continuous range of modes starting with 4x6, through 480x640 (padded), on up to huge resolutions like 4096x4096 (padded), which can be displayed with no flicker at low frame rates due to some characteristics of the eye I have looked at.

Coprime H and V scanned without blanking padding produces a display that doesn't loop. The presence of a *sole* common factor of 2 between H and V allows looping. No retrace, no high voltage flyback. The cell basis underlying the monitor idea is a minor refinement: transmitting pixels in this order preserves something called adjacency, keeping interruptions in transmission to small areas. Strangely enough, even multidimensional blocks of data can be scanned diagonally with subblocks to preserve adjacency.

Actually for the modes listed, padding by two (n=2) does cause the loop to exit on the first try through the while. There's no point in padding by one as below. The modes really need to stay even/even.

Here is some program output that does:

I note that the 13th colum is all twos. The 13th headder is ## (+2, +2) So we agree. All the modes listed here can be padded by two to get a sole common factor of two. All the modes (not an identical list) in Modes.gif can be padded by two to get this same sole common factor. It works. Yes, my program wasn't well written.

Thanks very much, I should read up and PowerStrip writes modelines for me now. There are many more modes available with diagonal scan than manufacturers have agreed on so far, and they are available in flexible ways with little variation in screen results when rates are pushed.

As soon as I get a nag screen in PowerStrip I'll pay since I *am* using it.

Here's the smallest diagonal mode that loops:

x a i h p q w j b o g r k v n c s f l m u t d e

Where pixels 1-24 in the 4x6 block are label a-x. The first pixel is one from the corner, but it's a loop, so that doesn't matter....

Doug Goncz Replikon Research Falls Church, VA 22044-0393

I noticed some kind of adjustable pixel clock in PowerStrip and wonder if any pixel clock is the same as or can be locked to the sample rate of an audio stream.

Doug Goncz Replikon Research Falls Church, VA 22044-0394

you'd be hard pressed to find any pixel clocks below 500Khz, (most are well over 5Mhz) but audio can possibly be resampled or interpolated to get a similar effect.

Bye. Jasen