samedi 12 mars 2005

Everything You Always Wanted to Know About DV

Tout ce que vous avez toujours savoir sur la technique numérique sans jamais oser le demander, c'est sur le site d'Adam Wilt, video geek autoproclamé (transmis par JK, alias Le loup du Hoggar).

Extrait des FAQs consacrées à la DV (le site propose aussi une sélection d'articles pour la HD) :
How good are the DV formats compared to other formats?

DV formats are typically reckoned to be equal to or slightly better than Betacam SP and MII in terms of picture quality (however, DV holds up better over repeated play cycles, where BetaSP shows noticeable dropout). They are a notch below Digital-S and DVCPRO50, which are themselves a (largely imperceptible) notch below Digital Betacam, D-1, and D-5. They are quite a bit better than 3/4" U-matic, Hi8, and SVHS.

On a scale of 1 to 10, where 1 is just barely video and 10 is as good as it gets, I would arrogantly rate assorted formats as follows:

D-5 (10-bit uncompressed digital) ..... 10
D-1 (8-bit uncompressed digital) ....... 9.9
Digital Betacam, Ampex DCT .............. 9.7
D-9 (Digital-S), DVCPRO50 ................. 9.6
DV, DVCAM, DVCPRO (D-7), Digital8 .... 9
MII, Betacam SP ................................ 8.9
1" Type C .......................................... 8.7
3/4" SP..................................... 6.5
3/4", Hi8, SVHS ......................... 5.5
Video 8, Betamax ....................... 4
VHS ............................................ 3.5
EIAJ Type 1, Fisher-Price Pixelvision .. 1

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