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Technology Stocks : Intel Corporation (INTC)

INTC 41.14

-3.4%

Jan 8 3:59 PM EST

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To: Mark Brophy who wrote (10349)	2/6/1997 1:49:00 PM
From: Paul Engel	of 186894

Mark - Re:"How much data can be sent during the vertical blanking interval?" Excellent question! The following description, from WavePhore, answers this question explicitly. Paul (====================================================================} From WavePhore (Thank's guys!) The North American television signal (NTSC) consists of 525 lines divided in two fields, each with 262 lines. The first 21 lines of each field are "invisible" and carry the name Vertical Blanking Interval or "VBI." The television needs lines 1 to 9 to tune each field, which leaves lines 10 to 21 to transmit information. Line 21 is already being used by closed captioning services for the hearing impaired.WavePhore's VBI products provide speeds of up to 150Kbps utilizing 10 lines of VBI. WavePhore's in-band technology inserts data into the active portion of the analog video signal (the remaining 504 lines), providing throughput of up to 384Kbps. The WavePhore System handles VBI and TVT1 individually or simultaneously at a collective throughput of over 500Kbps.

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