compression? at DVinfo.net

Henry Jefferson · August 10th, 2004, 04:46 AM

could you guys tell me where i can find a comprehensive explanation of compression, colour space and how compression affects lattitude

That would be really appreciated
thanks Henry

Laurence Maher · August 23rd, 2004, 04:27 AM

go to www.pixelmonger.com

A guy named Scott Billups wrote a book called Digital Moviemaking (2ond Edition). Best video book I ever read to turn me from a dv novice into a HD professional (academically anyway).

Actually, best film industry book I ever read.

Good Stuff.

Andre De Clercq · August 23rd, 2004, 06:06 AM

Henry yr questions are not covered in two words... But just in short: (video)compession doesn't affect lattitude. Color spaces tell us how displays, scanners,... behave (which colors) w.r.t. applied signals. These are the so called device dependant color spaces...big chaos! Absolute color spaces (CIELAB...) are the only real predictable ones. There is a movement towards better color space definitions (sRGB) for all devices. Crompression involves a bunch of tools which are used for ending up with images with a lower amount of bits per image. The tools are based on leaving out components in the signal which are not seen by the human eye, or starting from another way to represent pics (tranform coding..DCT) and/or smart tricks on bit interpretations (run length encoding...)

August 10th, 2004, 04:46 AM	#1
Henry Jefferson New Boot Join Date: Apr 2004 Location: london Posts: 6	compression? could you guys tell me where i can find a comprehensive explanation of compression, colour space and how compression affects lattitude That would be really appreciated thanks Henry

August 23rd, 2004, 04:27 AM	#2
Laurence Maher Join Date: May 2004 Location: denton, texas, usa Posts: 416	go to www.pixelmonger.com A guy named Scott Billups wrote a book called Digital Moviemaking (2ond Edition). Best video book I ever read to turn me from a dv novice into a HD professional (academically anyway). Actually, best film industry book I ever read. Good Stuff.

August 23rd, 2004, 06:06 AM	#3
Andre De Clercq Major Player Join Date: Sep 2002 Location: Belgium Posts: 804	Henry yr questions are not covered in two words... But just in short: (video)compession doesn't affect lattitude. Color spaces tell us how displays, scanners,... behave (which colors) w.r.t. applied signals. These are the so called device dependant color spaces...big chaos! Absolute color spaces (CIELAB...) are the only real predictable ones. There is a movement towards better color space definitions (sRGB) for all devices. Crompression involves a bunch of tools which are used for ending up with images with a lower amount of bits per image. The tools are based on leaving out components in the signal which are not seen by the human eye, or starting from another way to represent pics (tranform coding..DCT) and/or smart tricks on bit interpretations (run length encoding...)