High Definition Video

High Definition Video Conferencing requires extreme network capacity

Video Conferencing is only as good as the network. High Definition Video Conferencing requires a network capacity that can facilitate the extreme amount of data traffic needed for HD video conferencing, in addition to HD video conferencing equipment.

Media Network Services (MNS) provides a global network service optimized for High Definition Video Conferencing, bringing your employees, customers, and partners even closer together whenever a HD Video Conferencing session is needed.

The HD network service comes with guaranteed capacity at affordable rates.

• Learn more about MNS’ network services for High Definition Video Conferencing.

What is High Definition Video?

High-definition video or HD video refers to any video system of higher resolution than standard-definition (SD) video, and most commonly involves display resolutions of 1280×720 pixels (720p) or 1920×1080 pixels (1080i/1080p).

 High definition video (prerecorded and broadcast) is defined threefold, by:

•  The number of lines in the vertical display resolution. High-definition television (HDTV) resolution is 1080 or 720 lines. In contrast, regular digital television (DTV) is 480 lines (upon which NTSC is based, 480 visible scanlines out of 525) or 576 lines (upon which PAL/SECAM are based, 576 visible scanlines out of 625). However, since HD is broadcast digitally, its introduction sometimes coincides with the introduction of DTV. Additionally, current DVD quality is not high-definition, although the high-definition disc systems Blu-ray Disc and the defunct HD DVD are.
• The scanning system: progressive scanning (p) or interlaced scanning (i). Progressive scanning redraws an image frame (all of its lines) when refreshing each image. Interlaced scanning draws the image field every other line or “odd numbered” lines during the first image refresh operation, and then draws the remaining “even numbered” lines during a second refreshing. Interlaced scanning yields greater image resolution if subject is not moving, but loses up to half of the resolution and suffers “combing” artifacts when subject is moving.
• The number of frames or fields per second. The 720p60 format is 1280 × 720 pixels, progressive encoding with 60 frames per second (60 Hz). The 1080i50 format is 1920 × 1080 pixels, interlaced encoding with 50 fields per second. Sometimes interlaced fields are called half-frames, but they are not, because two fields of one frame are temporally shifted; video engineers use the term ‘picture’ instead. Frame pulldown and segmented frames are special techniques that allow transmitting full frames by means of interlaced video stream.

Source: Wikipedia