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Digital Cinema Concepts
Digital Cinema Concepts HD979: ATSC
In the United States, the original ATSC standards for HDTV supported 1080p video, but only at the frame rates of 23.976, 24, 25, 29.97 and 30 frames per second (colloquially known as 1080p24, 1080p25 and 1080p30).
In July 2008, the ATSC standards were amended to include H.264/MPEG-4 AVC compression and 1080p at 50, 59.94 and 60 frames per second (1080p50 and 1080p60). Such frame rates require H.264/AVC High Profile Level 4.2, while standard HDTV frame rates only require Level 4.0.
This update is not expected to result in widespread availability of 1080p60 programming, since most of the existing digital receivers in use would only be able to decode the older, less-efficient MPEG-2 codec, and because there is a limited amount of bandwidth for subchannels.
The field rate of 1080i
The field rate of 1080i is typically 60 Hz (i.e., 60 fields per second) for countries that use or used System M as analog broadcast television system (such as United States, Canada, Japan, and most of Latin America), or 50 Hz for regions that traditionally used television systems with 50 fields/sec rate (such as in Europe, Australia, much of Asia, Africa, and part of Latin America). Both field rates can be carried by major digital television broadcast formats such as ATSC, DVB, and ISDB-T International.
The frame rate can be implied by the context, while the field rate is generally specified after the letter i, such as "1080i60". In this case 1080i60 refers to 60 fields per second. The European Broadcasting Union (EBU) prefers to use the resolution and frame rate (not field rate) separated by a slash, as in 1080i/30 and 1080i/25, likewise 480i/30 and 576i/25. Resolutions of 1080i60 or 1080i50 often refers to 1080i/30 or 1080i/25 in EBU notation.Digital Cinema Concepts
Digital Cinema Concepts sell: 1080p on video game consoles
Video game consoles such as Sony's PlayStation 3, Microsoft's Xbox 360 and Nintendo's Wii U, as well as microconsoles like OUYA, GameStick and Nvidia Shield can display upscaled games and video content in 1080p, although the vast majority of games are rendered at lower resolutions. For all of the consoles, this is done through HDMI connections (in the case of the Xbox 360, HDMI is only available on consoles manufactured after June 2007). Additionally, the upscaled 1080p video is available on the PlayStation 3 and Xbox 360 via an analog component/D-Terminal (YPBPR) connection,†‡ as well as the VGA connection on the Xbox 360. On the PlayStation 3, developers must provide specific resolution support at the software level as there is no hardware upscaling support, whereas on the Xbox 360 games can be upscaled using a built in hardware scaler chip. However, most games on both consoles do not run at a native 1080p resolution.
A clean print at a typical movie theater may have a contrast ratio of 500:1. Dynamic contrast ratio is usually measured at factory with two panels (one versus another) of the same model as each panel will have an inherent dark and light (hot) spot. Static is usually measured with the same screen showing half screen full bright vs half screen full dark. This usually results in a lower ratio as brightness will creep into the dark area of the screen thus giving a higher luminance. Digital Cinema Concepts HD979 for sale
Digital Cinema Concepts:The ANSI contrast
The ANSI contrast - the measurement is done with a checker board patterned test image where the black and white luminosity values are measured simultaneously. This is a more realistic measure of system capability, but includes the potential of including the effects of the room into the measurement, if the test is not performed in a room that is close to ideal.
It is useful to note that the full on/full off method effectively measures the dynamic contrast ratio of a display, while the ANSI contrast measures the static contrast ratio.
In the United States, the original ATSC standards for HDTV supported 1080p video, but only at the frame rates of 23.976, 24, 25, 29.97 and 30 frames per second (colloquially known as 1080p24, 1080p25 and 1080p30).
In July 2008, the ATSC standards were amended to include H.264/MPEG-4 AVC compression and 1080p at 50, 59.94 and 60 frames per second (1080p50 and 1080p60). Such frame rates require H.264/AVC High Profile Level 4.2, while standard HDTV frame rates only require Level 4.0.
This update is not expected to result in widespread availability of 1080p60 programming, since most of the existing digital receivers in use would only be able to decode the older, less-efficient MPEG-2 codec, and because there is a limited amount of bandwidth for subchannels.
The field rate of 1080i
The field rate of 1080i is typically 60 Hz (i.e., 60 fields per second) for countries that use or used System M as analog broadcast television system (such as United States, Canada, Japan, and most of Latin America), or 50 Hz for regions that traditionally used television systems with 50 fields/sec rate (such as in Europe, Australia, much of Asia, Africa, and part of Latin America). Both field rates can be carried by major digital television broadcast formats such as ATSC, DVB, and ISDB-T International.
The frame rate can be implied by the context, while the field rate is generally specified after the letter i, such as "1080i60". In this case 1080i60 refers to 60 fields per second. The European Broadcasting Union (EBU) prefers to use the resolution and frame rate (not field rate) separated by a slash, as in 1080i/30 and 1080i/25, likewise 480i/30 and 576i/25. Resolutions of 1080i60 or 1080i50 often refers to 1080i/30 or 1080i/25 in EBU notation.Digital Cinema Concepts
Digital Cinema Concepts sell: 1080p on video game consoles
Video game consoles such as Sony's PlayStation 3, Microsoft's Xbox 360 and Nintendo's Wii U, as well as microconsoles like OUYA, GameStick and Nvidia Shield can display upscaled games and video content in 1080p, although the vast majority of games are rendered at lower resolutions. For all of the consoles, this is done through HDMI connections (in the case of the Xbox 360, HDMI is only available on consoles manufactured after June 2007). Additionally, the upscaled 1080p video is available on the PlayStation 3 and Xbox 360 via an analog component/D-Terminal (YPBPR) connection,†‡ as well as the VGA connection on the Xbox 360. On the PlayStation 3, developers must provide specific resolution support at the software level as there is no hardware upscaling support, whereas on the Xbox 360 games can be upscaled using a built in hardware scaler chip. However, most games on both consoles do not run at a native 1080p resolution.
Digital Cinema Concepts review
A clean print at a typical movie theater may have a contrast ratio of 500:1. Dynamic contrast ratio is usually measured at factory with two panels (one versus another) of the same model as each panel will have an inherent dark and light (hot) spot. Static is usually measured with the same screen showing half screen full bright vs half screen full dark. This usually results in a lower ratio as brightness will creep into the dark area of the screen thus giving a higher luminance. Digital Cinema Concepts HD979 for sale
Digital Cinema Concepts:The ANSI contrast
The ANSI contrast - the measurement is done with a checker board patterned test image where the black and white luminosity values are measured simultaneously. This is a more realistic measure of system capability, but includes the potential of including the effects of the room into the measurement, if the test is not performed in a room that is close to ideal.
It is useful to note that the full on/full off method effectively measures the dynamic contrast ratio of a display, while the ANSI contrast measures the static contrast ratio.
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