On Wed, 29 Nov 2000 18:49:29 -0500, you wrote: >----- Original Message ----- >From: Nigel Goodwin >To: >Sent: Wednesday, November 29, 2000 6:10 PM >Subject: Re: [EE]: Video: Color to B/W conversion > > >> In message , >> Matthew Fries writes >> >Speaking of Comb filers... I was looking at televisions at Best Buy = and >> >one of them boasted a "Digital Comb Filter". How can this be? Isn't = the >> >comb filter deep in analog territory? What can be digital about it? >> > >> >These were NTSC televisions, not the HDTV variety either. >> >> It's quite simple, all the processing is done digitally inside chips, >> they just implement a comb filter algorithm in the software - probably >> using a DSP. > >At video frequencies!! ?? !! Yes - take a look at any PC video capture card - you won't see any big analogue delay lines or filters - all done digitally. Check out the Brooktree website for data if you want to read more.=20 -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.