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Wavelength - Disk space

If infrared has a wavelength of 650 nm and violet has 405 (60% shorter) then how would that permit 21 more gigabytes to fit? Shouldn't the number be 7.5? What am I miscalculating?--Spectatorbot13 (talk) 13:57, 11 April 2009 (UTC)[reply]

8-bit or 10-bit color depth

Is Blu-Ray video 8-bit or 10-bit in color depth? I could not find this info anywhere. DORC (talk) 12:07, 20 April 2009 (UTC)[reply]

Attacks on the DRM

"The first known attack relied on the trusted client problem. In addition, decryption keys have been extracted from a weakly protected player (WinDVD)". Please explain what an attack relying on the "trusted client problem" is, and what's the difference is between that and extracting keys from a PC software (WinDVD). Unless somebody can add more info I suggest we change this. Has any attack relied on something else than extracting single device keys from software or hardware players? -- LM, 6 June 2009.