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Digital Cinema Concepts
Digital Cinema Concepts HD979: Full HD Consumer televisions
AV equipment manufacturers have adopted the term Full HD to mean a set can display all available HD resolutions up to 1080p. The term is misleading, however, because it does not guarantee the set is capable of rendering digital video at all frame rates encoded in source files with 1080 pixel vertical resolution. Most notably, a "Full HD" set is not guaranteed to support the 1080p24 format, leading to consumer confusion.
DigitalEurope (formerly EICTA) maintains the HD ready 1080p logo program that requires the certified TV sets to support 1080p24, 1080p50, and 1080p60, without overscan/underscan and picture distortion.
Interlacing videos benefits
Given a fixed bandwidth and high refresh rate, interlaced video can also provide a higher spatial resolution than progressive scan. For instance, 1920�1080 pixel resolution interlaced HDTV with a 60 Hz field rate (known as 1080i60 or 1080i/30) has a similar bandwidth to 1280�720 pixel progressive scan HDTV with a 60 Hz frame rate (720p60 or 720p/60), but achieves approximately twice the spatial resolution for low-motion scenes.
However, bandwidth benefits only apply to analog or uncompressed digital video signal. With digital video compression, as used in all current digital TV standards, interlacing introduces additional inefficiencies. EBU has performed tests that show that the bandwidth savings of interlaced video over progressive video is minimal, even with twice the frame rate. I.e., 1080p50 signal produces roughly the same bit rate as 1080i50 (aka 1080i/25) signal, and 1080p50 actually requires less bandwidth to be perceived as subjectively better than its 1080i/25 (1080i50) equivalent when encoding a "sports-type" scene.Digital Cinema Concepts review
Digital Cinema Concepts sell: Blu-ray Disc
Blu-ray Discs are able to hold 1080p HD content, and most movies released on Blu-ray Disc produce a full 1080p HD picture when the player is connected to a 1080p HDTV via an HDMI cable. The Blu-ray Disc video specification allows encoding of 1080p23.976, 1080p24, 1080i50, and 1080i59.94. Generally this type of video runs at 30 to 40 megabits per second, compared to the 3.5 megabits per second for conventional standard definition broadcasts.
Higher contrast ratio
There are ways to achieve a higher contrast ratio. As you have likely noticed, commercial and high end movie theaters are always dark, including black walls and ceilings. Movie theaters and high end installations go through all this trouble because projectors look their best when there is no light in the room. In high end installations this even includes stray light reflected off of the projection screen. Stray and ambient light will reduce the contrast of the image and work to make the blacks appear more grey, essentially washing out the image. A projector does not projector black, black is the absence of light. Any light falling on the screen from a source other than the projector will raise the absolute black level and reduce the contrast. Ideally, a home theater should have little to no ambient light present. However, most people do not want to darken the walls of their home theater or multipurpose rooms just to achieve ideal theater conditions. The other option is to purchase a high-contrast gray screen which will improve black levels and the contrast ratio of the projector image. For the best possible image, proceed with any steps necessary to eliminate ambient light and reflective surfaces on the walls and ceiling. Digital Cinema Concepts HD979 for sale
Digital Cinema Concepts:Contrast ratio
The contrast ratio is a property of a display system, defined as the ratio of the luminance of the brightest color (white) to that of the darkest color (black) that the system is capable of producing. A high contrast ratio is a desired aspect of any display. It has similarities with dynamic range.
AV equipment manufacturers have adopted the term Full HD to mean a set can display all available HD resolutions up to 1080p. The term is misleading, however, because it does not guarantee the set is capable of rendering digital video at all frame rates encoded in source files with 1080 pixel vertical resolution. Most notably, a "Full HD" set is not guaranteed to support the 1080p24 format, leading to consumer confusion.
DigitalEurope (formerly EICTA) maintains the HD ready 1080p logo program that requires the certified TV sets to support 1080p24, 1080p50, and 1080p60, without overscan/underscan and picture distortion.
Interlacing videos benefits
Given a fixed bandwidth and high refresh rate, interlaced video can also provide a higher spatial resolution than progressive scan. For instance, 1920�1080 pixel resolution interlaced HDTV with a 60 Hz field rate (known as 1080i60 or 1080i/30) has a similar bandwidth to 1280�720 pixel progressive scan HDTV with a 60 Hz frame rate (720p60 or 720p/60), but achieves approximately twice the spatial resolution for low-motion scenes.
However, bandwidth benefits only apply to analog or uncompressed digital video signal. With digital video compression, as used in all current digital TV standards, interlacing introduces additional inefficiencies. EBU has performed tests that show that the bandwidth savings of interlaced video over progressive video is minimal, even with twice the frame rate. I.e., 1080p50 signal produces roughly the same bit rate as 1080i50 (aka 1080i/25) signal, and 1080p50 actually requires less bandwidth to be perceived as subjectively better than its 1080i/25 (1080i50) equivalent when encoding a "sports-type" scene.Digital Cinema Concepts review
Digital Cinema Concepts sell: Blu-ray Disc
Blu-ray Discs are able to hold 1080p HD content, and most movies released on Blu-ray Disc produce a full 1080p HD picture when the player is connected to a 1080p HDTV via an HDMI cable. The Blu-ray Disc video specification allows encoding of 1080p23.976, 1080p24, 1080i50, and 1080i59.94. Generally this type of video runs at 30 to 40 megabits per second, compared to the 3.5 megabits per second for conventional standard definition broadcasts.
Digital Cinema Concepts
Higher contrast ratio
There are ways to achieve a higher contrast ratio. As you have likely noticed, commercial and high end movie theaters are always dark, including black walls and ceilings. Movie theaters and high end installations go through all this trouble because projectors look their best when there is no light in the room. In high end installations this even includes stray light reflected off of the projection screen. Stray and ambient light will reduce the contrast of the image and work to make the blacks appear more grey, essentially washing out the image. A projector does not projector black, black is the absence of light. Any light falling on the screen from a source other than the projector will raise the absolute black level and reduce the contrast. Ideally, a home theater should have little to no ambient light present. However, most people do not want to darken the walls of their home theater or multipurpose rooms just to achieve ideal theater conditions. The other option is to purchase a high-contrast gray screen which will improve black levels and the contrast ratio of the projector image. For the best possible image, proceed with any steps necessary to eliminate ambient light and reflective surfaces on the walls and ceiling. Digital Cinema Concepts HD979 for sale
Digital Cinema Concepts:Contrast ratio
The contrast ratio is a property of a display system, defined as the ratio of the luminance of the brightest color (white) to that of the darkest color (black) that the system is capable of producing. A high contrast ratio is a desired aspect of any display. It has similarities with dynamic range.
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