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What is the difference between HD & SD video

The evolution of the TV screen

When producing videos, consideration must be made for the screen size and ratio on which it will be viewed.  Older CRT (Cahtode Ray Tube) televisions evolved from the standards set in North America in the 1950s by the NTSC (National Television Systems Committee). These old TVs, with a screen aspect ratio of 4:3, produced a video image by alternately scanning 525 horizontal lines on the CRT.  Since the early 1990s there has been a gradual transition to digital video and an upgraded resolution to improve picture quality on larger screens. The broadcast and streaming standard is now HD (High Definition) in the 16:9 aspect ratio with some providers offering Ultra-HD, 4k or even 8k.

What standards will KAV use for your video project?

At KAV, our preferred format is HD since it provides excellent quality on larger screens at full resolution: 1080 x 1920 pixels; or good quality for smaller screens at a resolution of 720 x 1080 pixels.  The NTSC standard for DVD videos is 720 x 480 pixels and they can be authored as either widescreen 16:9 or 4:3 screen aspect ratios.  This option is normally dictated by the original source media. Legacy analog video tape equipment, such as VHS or Beta VCRs and camcorders, recorded using the 4:3 ratio.

We shoot primarily in full 1080 HD and usually export edited video to 1080p mp4 digital file, HD Blu-ray.  We also have some equipment that can acquire video in Ultra HD, also know as 4k, at a resolution of  3840 x 2160.  HD Videos can also be down converted to play on standard DVD-video in wide screen format at 480p. If you are providing us footage to edit or digitize, we will generally match the source resolution. SD footage is not up-converted to HD. For slideshows or film transfers, please specify your preferred video format when ordering.

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