Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : C-Cube -- Ignore unavailable to you. Want to Upgrade?

To: John Rieman who wrote (35661)	9/2/1998 6:50:00 PM
From: J Fieb	Read Replies (1) \| Respond to of 50808

Frank's Q was pretty good: newmedia.com MPEG All the Way? By Andy Ihnatko ----------------------------------------------------------------------- You're not dealing with the same MPEG 2 at every step of production. ------------------------------------------------------------------------ Q If I'm going to create a DVD with MPEG 2 video, doesn't it make sense that I should acquire video clips using Sony's MPEG 2-based Betacam SX (rather than DV or DVCPro50) so I can stay MPEG all the way? -- Frank Croft, Cambridge, Massachusetts A No. Next question. Oh, all right. The problem specific to DVD is that while you are indeed dealing with MPEG 2 all the way through, you're not dealing with the same MPEG 2 at every step of production. No matter how simple or convoluted the path is from photons streaming through a lens to ones and zeros being burned into a DVD, the last step will always involve decompressing and recompressing the data to another bit rate, especially since DVD video is most often variable-bit-rate. So if your eyes got all misty upon hearing about "Staying MPEG All the Way," well, there's just no "there" there. If you're comparing the SX to a plain DV camera, though, you would at least benefit from superior color resolution; regular DV records 4:1:1 video, whereas Sony's Studio Profile MPEG 2 calls for 4:2:2, which means that the SX does twice as much color subsampling and thus records a more swellegant picture. But Panasonic's DVCPro50 is also 4:2:2 (as is Digital Betacam going into an M-JPEG system, incidentally), so bang goes that advantage.