best 3d dvd player review image
Angelo
Aren't we breaking laws of physics? A television camera scans at 60 Mhz, then sends out the signal to television sets. No matter how fast the refresh rate is on the television, you cannot reproduce a picture clearer than what the camera photographed, right? I do not understand all the hoopla about televisions with fast refresh rates.
Answer
LCD manufacturers started increasing the refresh rates of LCD displays because of a perception of image blurring during fast motion. There is more detailed information about that, and how much it actually helps, here: http://reviews.cnet.com/4520-6449_7-6792632-1.html .
Another reason is that motion pictures are filmed at 24 fps (frames per second). The standard refresh rate for TVs in the U.S. has been 60Hz. To prepare 24 fps material for video display (such as on DVD), components of the image are repeated, so that film material can be stored at 30Hz for video. This way a TV can get frames that divide into a whole number for correct display and timing (60/2=30). The problem is that detail is sacrificed somewhat to create the illusion of 30 from 24 (the extra frame data is an approximation, and not original material).
Blu-ray discs can preserve the structure of 24 fps film by encoding the video at 24Hz. If you have a 60Hz Tv, then the Blu-ray player will have to make up the intermediate frames to get an even number, because 60/24=2.5. But if you get a 120Hz TV, there is no need to create intermediate frames, because 120/24=5. So Blu-ray material can look sharper and more filmlike on a 120Hz TV than a 60Hz one.
With the increase in refresh rates, some TVs also incorporate motion processing. They are creating intermediate frames, not because they need to compensate for timing differences, but to create more fluid movement. They eliminate the cadence of 24 fps film and make movies look more like live video broadcasts. Technically the feature is independent of the refresh rate, but some manufacturers make it the default mode so that you have to look in the TV's menus to disable it.
3D material will also become available for home viewing, and refresh rates of 120Hz are considered the minimum to handle the display of stereo frame data.
LCD manufacturers started increasing the refresh rates of LCD displays because of a perception of image blurring during fast motion. There is more detailed information about that, and how much it actually helps, here: http://reviews.cnet.com/4520-6449_7-6792632-1.html .
Another reason is that motion pictures are filmed at 24 fps (frames per second). The standard refresh rate for TVs in the U.S. has been 60Hz. To prepare 24 fps material for video display (such as on DVD), components of the image are repeated, so that film material can be stored at 30Hz for video. This way a TV can get frames that divide into a whole number for correct display and timing (60/2=30). The problem is that detail is sacrificed somewhat to create the illusion of 30 from 24 (the extra frame data is an approximation, and not original material).
Blu-ray discs can preserve the structure of 24 fps film by encoding the video at 24Hz. If you have a 60Hz Tv, then the Blu-ray player will have to make up the intermediate frames to get an even number, because 60/24=2.5. But if you get a 120Hz TV, there is no need to create intermediate frames, because 120/24=5. So Blu-ray material can look sharper and more filmlike on a 120Hz TV than a 60Hz one.
With the increase in refresh rates, some TVs also incorporate motion processing. They are creating intermediate frames, not because they need to compensate for timing differences, but to create more fluid movement. They eliminate the cadence of 24 fps film and make movies look more like live video broadcasts. Technically the feature is independent of the refresh rate, but some manufacturers make it the default mode so that you have to look in the TV's menus to disable it.
3D material will also become available for home viewing, and refresh rates of 120Hz are considered the minimum to handle the display of stereo frame data.
Please recommend me the Best 3D TV for my family?
Kathleen B
Iâve been looking for a TV for my family and decided to buy a Full HD 3D TV since my kids love the animated movies. I researched and read many of the 3D TV reviews on the web. I learned there are active and passive 3D TV. What is the difference between those two? Does anyone know which one is better?
Answer
3DTV is a waste of money right now. It's still very expensive, and honestly the content just doesn't justify the prices. In addition, new technologies are due within the next few years that will make the whole 3d glasses thing obsolete.
Active glasses use an electric shutter to cover 1 eye and then the other. At the same time the TV only displays the image for the uncovered eye. This happens several times a second so your brain thinks it sees 2 separate images and combines them to form the 3d image. Active glasses are very expensive ($100/pair) and relatively fragile.
Passive glasses are like those you've used in the theater. The screen shows both images at once but the lenses are slightly polarized in different ways so each eye only sees a different image. Passive glasses are cheaper ($30) however you're essentially watching TV with sunglasses.
You then have to buy a 3D blu-ray player, and then 3D blu-ray movies. While the 3D blu-ray movies also come with plain old blu-ray and DVD versions, you're still looking at $40 for a movie.
3DTV is a waste of money right now. It's still very expensive, and honestly the content just doesn't justify the prices. In addition, new technologies are due within the next few years that will make the whole 3d glasses thing obsolete.
Active glasses use an electric shutter to cover 1 eye and then the other. At the same time the TV only displays the image for the uncovered eye. This happens several times a second so your brain thinks it sees 2 separate images and combines them to form the 3d image. Active glasses are very expensive ($100/pair) and relatively fragile.
Passive glasses are like those you've used in the theater. The screen shows both images at once but the lenses are slightly polarized in different ways so each eye only sees a different image. Passive glasses are cheaper ($30) however you're essentially watching TV with sunglasses.
You then have to buy a 3D blu-ray player, and then 3D blu-ray movies. While the 3D blu-ray movies also come with plain old blu-ray and DVD versions, you're still looking at $40 for a movie.
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