XGpublishing

HD Video

High Definition Philosophy
We have been delivering HD productions since 2006.
HD is at its most spectacular when used for live projection (at fairs, meetings, presentations and so on), but HD content can also be distributed with great effect over the Internet or on blu-ray discs.

HD Aerial Shooting (Helicopter Wescam)
The most breathtaking shooting technique is HD shot from a helicopter equipped with a Wescam stabilization system.

Which Camera?
We have tested every camera available on the market, enabling us to select the right equipment for your specific production, depending on how it will be used and the parameters of your budget.
HD video has many different formats, but only three can be considered Full HD:
• HDTV (1920x1080, 50 to 100 Mbit/s)
• Cinema 2K and Cinema 4K will become the standard formats for digital cinemas (respectively 2048 and 4096 horizontal pixel resolution, 64 to 100 Mbit/s)

Putting our clients' needs first
We take provide in servicing our clients to give them the best results for their specific objectives. We sit down and explain the differences between all of the various formats, which is oftn when our clients comment on the true value of hiring professionals.

High Definition Video
High definition video is a spectacular medium expecially when it is enriched by impressive sound design in HD audio.
High-definition (HD) video is the term given to any video system with a higher resolution than standard definition (SD) video, which is 720x576. The term usually refers to resolutions of 1280×720 (known as 720p or 720i) and 1920×1080 (1080i or 1080p).

What is 3D HD?
3D HD (3D High Definition video) is the next big thing. Using a customised rig with two adapted Sony HDC-950 cameras spaced 70mm apart, this technique captures left- and right-eye imagery in HD. The footage can then be viewed using 3D glasses in an IMAX cinema. This technique, combined with HD Audio, enables viewers to feel as if they really are at the centre of the action. 3D HD has already been successfully trialled with high profile sports events and a number of big-budget films are being released in the format.

HD Video is defined by three particular characteristics:
The scanning system
Whilst cinema works as a sequence of 24 full pictures per second, video is formed by replacing the lines of a frame in sequence. Progressive scanning (p) redraws all of the lines of an image frame each time it refreshes the image. Interlaced scanning (i) redraws odd numbered lines when it first refreshed the image and then redraws the even numbered lines during a second refreshing, then it refreshes the “odd numbered” lines again and so on. Interlaced scanning gives better resolution for stationary subjects, but for moving subjects loses up to 50% of the resolution and can result in combing (also known as feathering), which is when subject edges appear jagged, and line twitter, which is an apparent shimmering of horizontal lines. These artifacts are caused because the subject is in one position for the even lines and another position for the odd ones. Using interlacing shooting method does not necessarily mean scarificing quality perception, thanks to the retina’s persistence, that masks most of the artifacts, and for certain scenes like panning, scrolling, the interlaced images appear more fluid, but less defined.
The number of lines in the vertical display resolution
Normal digital TV (DTV) has 480 scan lines (NTSC) or 576 lines (PAL/SECAM) and it is always interlaced. High-definition TV (HDTV) has 720 or 1080 lines. DVD video is not HD, Blu-ray Discs are, but we can write HD video files on normal DVDs, but with data storage limits, of course.
The number of frames per second
The 1080 50i format is 1920 × 1080 pixels, encoding with 50 interlaced frames per second. The 720 60 p format is 1280 × 720 pixels, progressive encoding with 60 full frames per second.
The frame rate is not usually included in a product’s commercial name and is usually assumed to be either 50 or 60, except for 1080p, which denotes 1080p24 ( 24 is the number of frames per second used by traditional cinema), 1080p25, and 1080p30, but could also be 1080p50 and 1080p60.

It should also be noted that resolution is limited by three factors:
(1) the method of recording
(2) the transmission (e.g. broadcast) or storage (e.g. data compression and codec used for compression) format
(3) the monitor resolution