Display Resolution
The display resolution of a digital television or computer display typically refers to the number of distinct pixels in each dimension that can be displayed. It can be an ambiguous term especially as the displayed resolution is controlled by all different factors in cathode ray tube (CRT) and flat panel or projection displays using fixed picture-element (pixel) arrays.One use of the term "display resolution" applies to fixed-pixel-array displays such as plasma display panels (PDPs), liquid crystal displays (LCDs), digital light processing (DLP) projectors, or similar technologies, and is simply the physical number of columns and rows of pixels creating the display (e.g., 1280×1024). A consequence of having a fixed grid display is that for multiformat video inputs all displays need a "scaling-engine" (a digital video processor that includes a memory array) to match the incoming picture format to the display.
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HDMI
The High-Definition Multimedia Interface (HDMI) is a compact audio/video connector interface for transmitting uncompressed digital streams. It represents a digital alternative to consumer analog standards such as Radio Frequency (RF) coaxial cable, composite video, S-Video, SCART, component video, D-Terminal, and VGA. HDMI connects digital audio/video sources such as set-top boxes, Blu-ray Disc players, personal computers, video game consoles, and AV receivers to compatible digital audio devices, computer monitors, and digital televisions.HDMI supports, on a single cable, any TV or PC video format including standard, enhanced, and high-definition video along with up to 8 channels of digital audio.[1] It is independent of the various digital television standards such as ATSC and DVB as these are encapsulations of compressed MPEG video streams (which can be decoded and output as uncompressed video stream on HDMI).
Specifications |
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| Width | Type A (13.9 mm), Type C (10.42 mm) | |
| Height | Type A (4.45 mm), Type C (2.42 mm) | |
| Data signal | Yes | |
| Bandwidth | 10.2 Gbit/s (340 MHz) | |
| Protocol | TMDS | |
| Pins | 19 | |
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Digital Visual Interface (DVI):
The Digital Visual Interface (DVI) is a video interface standard designed to maximize the visual quality of digital display devices such as flat panel LCD computer displays and digital projectors. It was developed by an industry consortium, the Digital Display Working Group (DDWG). It is designed for carrying uncompressed digital video data to a display. It is partially compatible with the High-Definition Multimedia Interface (HDMI) standard in digital mode (DVI-D).Specifications |
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| External | Yes | |
| Video signal | Digital video stream. (Single) WUXGA 1920 × 1200 @ 60 Hz (Dual) WQXGA (2560 × 1600) @ 60 Hz Analog RGB video (-3 db at 400 MHz) | |
| Data signal | R,G,B data + clock and display data channel | |
| Bandwidth | (Single Link) 3.96 Gbit/s (Dual Link) 7.92 Gbit/s | |
| Max devices | 1 | |
| Protocol | 3 × Transition Minimized Differential Signaling data + clock | |
| Pins | 29 | |
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Aspect Ratios
An aspect ratio is the ratio between the width and height of a film image. The number denoting width comes first, and the height portion of the aspect ratio is always written as 1. A motion picture's aspect ratio often appears on the back of the DVD or video box. An example would be 1.85:1. This means that the size of the original theatrical presentation of that film is 1.85 times as wide as it is high.Aspect ratios are mathematically expressed as x :y (pronounced "x-to-y") and x×y (pronounced "x-by-y"). The most common aspect ratios used today in the presentation of films in movie theaters are 1.85:1 and 2.39:1[1]. Two common videographic aspect ratios are 4:3 (1.33:1), universal for standard-definition video formats, and 16:9 (1.78:1), universal to high-definition television and European digital television. Other cinema and video aspect ratios exist, but are used infrequently. In still camera photography, the most common aspect ratios are 4:3 and 3:2, though other aspect ratios, such as 5:4, 7:5, and 1:1 (square format), are used.
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