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In Reply to: Sony's Movie mode posted by Joe Murphy Jr on May 21, 2004 at 18:50:27:
Scan Velocity Modulation - Don't know what it is or what it does but calibrating while in Movie mode has produced fairly good results so far. I still need a long sit down session in front of the 5900 witn owner's manual in hand to make black level and LFE subwoofer adjustments. Thanks Joe!
Follow Ups:
From Video Essentials:Scan Velocity Modulation (SVM) SVM is one of the many tricks manufacturers use to get more light out of a picture tube, at the cost of real picture detail. It changes the speed or velocity of the beam as it is scanned from the left to the right side of the picture. In the process, it distorts real picture detail, causing dark areas of the picture on light backgrounds to be reproduced much larger than normal and light areas on dark backgrounds to be reproduced much smaller than normal. When the beam spends more time "writing" light areas, the phosphors receive more energy and produce more light output. The fact that this will contribute to phosphor blooming, as well as detail distortion seems to be lost on a number of manufacturers calling it a "feature." <-- Next time you see a Best Buy ad with Mitsubishi displays, you might get a chuckle out of this. Though I suspect now that you know what it really is, like me, you may cringe instead.
The presence or absence of SVM can be easily detected by displaying the needle pulse test pattern. In it the width of the white line, on the black background, and black line, on the white background, are the same. In a set with SVM, the width of the black line will be much larger than the white line. The test pattern can be found in many places in Video Essentials. In particular we would point you at VE T17 C4.
If SVM is found on a set, look for an ability to shut it off. Several sets we've looked at provide this option in the mode of the set designed to accurately reproduce the signal source. In some other sets, it's easily defeated by a qualified service technician.
I turned mine off just prior to calibrating the set tonight. Sony calls it "Clear Edge VM". Thanks Joe.
Abe,You are correct...Sony does call it Clear Edge VM, and it is adjustable. Revisiting the Pro and Movie settings shows that the difference in the factory settings of Pro and Movie is the Color Temp. Pro is set to Neutral Color temp and Movie is set to Warm.
Ken
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