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Microcap & Penny Stocks : Zulu-tek, Inc. (ZULU) -- Ignore unavailable to you. Want to Upgrade?

To: OtherChap who wrote (4793)	3/25/1998 5:44:00 PM
From: John Hanzl	Read Replies (2) \| Respond to of 18444

OtherChap - Humm, something I can respond to... Incidentaly, I have a targa non-linear video editing system on one of my computers, and I can display and edit full broadcast quality video from my hard drive array. TV quality video takes up a LOT of space. As in 7 megabytes per second, to be exact. It will be a long time before the net reaches those levels. Since you used the words "full broadcast quality" and "7 megabytes per second, to be exact" I need to correct you. I am the chief engineer for a video post house in Boston, and design digital equipment for the industry, so that is how I know... True broadcast, full resolution / framerate, standard definition as defined by CCIR601 as 720 active pixels per line (remember, TV pixels are rectangular, not square like on a computer so the 720x486 frame yields the 4x3 ratio needed for TV) and 486 lines per field. There are 30 frames per second - keeping in mind that the 720x486 is a non-interlaced FRAME. CCIR601 is a component, color difference system comprising of luminance (Y) and Red-Y (R-Y) and Blue-Y (B-Y)samples. The color diff components are bandwidth limited due to reduced color detail sensitivity in the eye so for every byte of Y you have a nibble of R-Y and a nibble of B-Y. Finally, remember that there are 1024 bytes in a kilobyte. The math yields: ((720 pixels/line x 486 lines/frame)x30 frames/sec) = 10,497,600 pixeles/second Each pixel is represented by one byte of Y and 0.5 bytes each for R-Y & B-Y so mult result above by 2 yields 20,995,200 bytes or 21 MegaBytes/second Actually it is 27MB/s because CCIR601 uses 10bits instead of 8, bit who is splitting hairs!? By the way, to broadcast that you need to serialize that data which results in a data stream of 270MegaBITS/second. Try spitting THAT through your modem, T1 line, T3 line, 10BaseT ethernet or even 100BaseT Ethernet - NOPE! However, if you want me to talk about compression, I could! JohnnyH