1080p desktop Background Free Photos Pictures Images 2013
Source:Google.com.pk
Biography:
1080p is a set of HDTV high-definition video modes characterized by 1080 horizontal lines of vertical resolution[1] and progressive scan, as opposed to interlaced, as is the case with the 1080i display standard. The term usually assumes a widescreen aspect ratio of 16:9, implying a resolution of 1920×1080 (2.1 megapixel) often marketed as Full HD.
The choice of 1080 lines originates with Charles Poynton, who in the early 1990s pushed for "square pixels" to be used in HD video formats.Any display device that advertises 1080p typically refers to the ability to accept 1080p signals in native resolution format, which means there are a true 1920 pixels in width and 1080 pixels in height, and the display is not overscanning, underscanning, or reinterpreting the signal to a lower resolution. The HD ready 1080p logo program, by DIGITALEUROPE, requires that certified TV sets support 1080p 24fps, 1080p 50fps, and 1080p 60fps formats, among other requirements, with fps defined as frames per second.
It is one of the more universally accepted video standards.For live broadcast applications, a high-definition progressive scan format operating at 1080p at 50 or 60 frames per second is currently being evaluated as a future standard for moving picture acquisition.
EBU has been endorsing 1080p50 as a future-proof production format because it improves resolution and requires no deinterlacing, allows broadcasting of standard 1080i25 and 720p50 signal alongside 1080p50 even in the current infrastructure and is compatible with DCI distribution formats.1080p50/p60 production format will require a whole new range of studio equipment including cameras, storage and editing systems,and contribution links (such as Dual-link HD-SDI and 3G-SDI) as it has doubled the data rate of current 50 or 60 fields interlaced 1920×1080 from 1.485 Gbit/s to nominally 3 Gbit/s using uncompressed RGB encoding. Most current revisions of SMPTE 274M and EBU Tech 3299 require YCbCr color space and 4:2:2 chroma subsampling for transmitting 1080p50 (nominally 2.08 Gbit/s) and 1080p60 signal.
Recent studies show that for digital broadcasts compressed with H.264/AVC, transmission bandwidth savings of interlaced video over fully progressive video are minimal even when using twice the frame rate, i.e., 1080p50 signal (50 progressive frames per second) actually produces the same bit rate as 1080i50 signal (25 interlaced frames or 50 sub-fields per second).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.In the United States, 1080p over-the-air broadcasts still do not exist as of January 2013; all major networks use either 720p60 or 1080i60 encoded with MPEG-2. However, satellite services (e.g., DirecTV, XstreamHD and Dish Network) utilize the 1080p/24-30 format with MPEG-4 AVC/H.264 encoding for pay-per-view movies that are downloaded in advance via satellite or on-demand via broadband.
1080p desktop Background Free Photos Pictures Images 2013
1080p desktop Background Free Photos Pictures Images 2013
1080p desktop Background Free Photos Pictures Images 2013
1080p desktop Background Free Photos Pictures Images 2013
1080p desktop Background Free Photos Pictures Images 2013
1080p desktop Background Free Photos Pictures Images 2013
1080p desktop Background Free Photos Pictures Images 2013
1080p desktop Background Free Photos Pictures Images 2013
1080p desktop Background Free Photos Pictures Images 2013
1080p desktop Background Free Photos Pictures Images 2013
1080p desktop Background Free Photos Pictures Images 2013
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