Friday, May 6, 2011
Powered speakers which are the best JBL QSC MACKIE
coming up this summer we are doing a shoot out of all the major brand powered speakers we will be testing in our shop in west los angeles and also talking to 20 of our rental customers from dj's to rock bands about which brand of powered speakers they have worked with and what they think this is going to be the real low down no hype review stay tuned http://www.audiorentalslosangeles.com
Sunday, January 31, 2010
What you need to know when buying a new TV
this brought to you by your friends in audio visual rentals
http://www.nofeedbackproductions.com and our new site
http://www.audiorentalslosangeles.com
Resolution is the main reason why HDTV looks so much better than standard television. On a high-definition TV displaying a high-definition source, a million or more pixelscombine to create images that appear sharper and more realistic than TV ever has before. Resolution isn't the be-all and end-all of picture quality, however, and its numerous, well, numbers, can be incredibly intimidating at first. In this article we'll try to demystify HDTV resolution and help you cut through the hype that surrounds all of those numbers.
Contents: How important is resolution? | Native resolution: The fix is in | HDTV source resolutions | HDTV display resolutions | The truth about 1080p | More mixed signals: 1080p/60 vs. 1080p/24
How important is resolution?
Although resolution separates HDTV from standard-definition TV, it's not as important to overall picture quality as other factors. According to the Imaging Science Foundation, a group that consults for home-theater manufacturers and trains professional video calibrators, the most important aspect of picture quality is contrast ratio the second most important is color saturation, and the third is color accuracy. Resolution comes in fourth, despite being the most-cited HDTV specification.
The point is, once you get to high-definition, it's difficult to discern further improvements in the sharpness of the picture. All other things being equal--namely contrast and color--HDTV looks more or less spectacular on just about any high-definition television regardless of its size, native resolution, or the HDTV signal's resolution itself. The leap from normal TV to HDTV is so big that additional leaps in resolution--from high-definition to higher-definition, let's say--are tiny by comparison.
Nonetheless the HDTV landscape is littered with resolution discussions, in regard to both sources and displays, so a little knowledge of how they interact is a good thing.
Native resolution: The fix is in
Nearly every HDTV sold today is a fixed-pixel display. A fixed-pixel display is any HDTV or monitor that uses discrete pixels to produce an image, including flat-panel LCD and plasma screens as well as rear-projection microdisplays and front projectors that use DLP, LCD, or LCoS technology. We'll ignore non-fixed-pixel displays, namely direct-view CRTs, because they treat incoming resolutions differently than their fixed-pixel cousins do--since they don't use discrete pixels, their specifications are much more difficult to pin down. They're also basically extinct as a product category.
All fixed-pixel displays have a native resolution specification that tells you how many pixels the display actually has. Native resolution is the absolute limit on the amount of detail you'll see. Typical native resolutions include 1080p and 720p.
Fixed-pixel displays follow a few basic rules:
If you read those three axioms closely, you'll see that source is everything with HDTV. Or, as George Fueschel first said, "Garbage in, garbage out." High-definition sources today come in one of three different resolutions: 1080p, 1080i, and 720p. Comparing the latter two, 1080i has more lines and pixels than 720p, but 720p is a progressive-scan format that should deliver a smoother image that stays sharper during motion. 1080p combines the
Contents: How important is resolution? | Native resolution: The fix is in | HDTV source resolutions | HDTV display resolutions | The truth about 1080p | More mixed signals: 1080p/60 vs. 1080p/24
How important is resolution?
Although resolution separates HDTV from standard-definition TV, it's not as important to overall picture quality as other factors. According to the Imaging Science Foundation, a group that consults for home-theater manufacturers and trains professional video calibrators, the most important aspect of picture quality is contrast ratio the second most important is color saturation, and the third is color accuracy. Resolution comes in fourth, despite being the most-cited HDTV specification.
The point is, once you get to high-definition, it's difficult to discern further improvements in the sharpness of the picture. All other things being equal--namely contrast and color--HDTV looks more or less spectacular on just about any high-definition television regardless of its size, native resolution, or the HDTV signal's resolution itself. The leap from normal TV to HDTV is so big that additional leaps in resolution--from high-definition to higher-definition, let's say--are tiny by comparison.
Nonetheless the HDTV landscape is littered with resolution discussions, in regard to both sources and displays, so a little knowledge of how they interact is a good thing.
Native resolution: The fix is in
Nearly every HDTV sold today is a fixed-pixel display. A fixed-pixel display is any HDTV or monitor that uses discrete pixels to produce an image, including flat-panel LCD and plasma screens as well as rear-projection microdisplays and front projectors that use DLP, LCD, or LCoS technology. We'll ignore non-fixed-pixel displays, namely direct-view CRTs, because they treat incoming resolutions differently than their fixed-pixel cousins do--since they don't use discrete pixels, their specifications are much more difficult to pin down. They're also basically extinct as a product category.
All fixed-pixel displays have a native resolution specification that tells you how many pixels the display actually has. Native resolution is the absolute limit on the amount of detail you'll see. Typical native resolutions include 1080p and 720p.
Fixed-pixel displays follow a few basic rules:
- No matter the resolution of the source material, whether VHS, DVD, or HDTV, a fixed-pixel display will always convert, or scale, it to fit its native resolution.
- If the incoming source has more pixels than the display's native resolution, you will lose some visible detail and sharpness, though often what you're left with still looks great. If the incoming source has fewer pixels than the native resolution, you're not getting any extra sharpness from the television's pixels.
- If the incoming signal matches the native resolution of the display exactly,such as when a 1080p HDTV displays a 1080i HDTV channel or a 1080p signalfrom a Blu-ray player, no scaling occurs as long as the TV is set to the proper aspect ratio mode, typically called "dot-by-dot," "native," or "1:1." Ideally, you always want to match the source resolution to the display's native resolution, to minimize picture anomalies that can be caused by scaling.
If you read those three axioms closely, you'll see that source is everything with HDTV. Or, as George Fueschel first said, "Garbage in, garbage out." High-definition sources today come in one of three different resolutions: 1080p, 1080i, and 720p. Comparing the latter two, 1080i has more lines and pixels than 720p, but 720p is a progressive-scan format that should deliver a smoother image that stays sharper during motion. 1080p combines the
superior resolution of 1080i with the progressive-scan smoothness of 720p. True 1080p is restricted to Blu-ray, some video-on-demand sources and the latest video games, however, and none of the major networks has announced 1080p broadcasts.
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