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HIGH DEFINITION VIDEO

HD or High Definition is a popular term for video and television nowadays, but no many people understand the options in the market. HD comes in many flavors and some of them sacrifice image quality. This is why is important to understand the technology behind high definition; and more for those involved in the video production process. What about the many sizes: 1080, 720, etc? Progressive or Interlaced? Why so many compression formats? What is H.264? Look for the answers in this page links.

 

 

  • HD 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). (Read more in Wikipedia).
  • Image resolution
    Image resolution describes the detail an image holds. The term applies to digital images, film images, and other types of images. Higher resolution means more image detail.(Read more in Wikipedia).
  • Aspect ratio
    The aspect ratio of an image is its width divided by its height.(Read more in Wikipedia).
  • High-definition television
    High-definition television (or HDTV, or just HD) refers to video having resolution substantially higher than traditional television systems.(Read more in Wikipedia).
  • Standard-definition television
    Standard-definition television Standard-definition television (or SDTV) is a television system that has a resolution that meets standards but not considered either enhanced-definition television (EDTV) or high-definition television (HDTV).(Read more in Wikipedia).
  • The Big Picture - Interlaced vs. Progressive, Fields vs. Frames, 3:2 Pulldown and Inverse Telecine
  • Interlace video
    Interlace is a technique of improving the picture quality of a video signal without consuming extra bandwidth. Interlaced video was designed for display on CRT televisions.(Read more in Wikipedia).
  • Progressive scan
    Progressive or noninterlaced scanning is a method for displaying, storing or transmitting moving images in which all the lines of each frame are drawn in sequence.(Read more in Wikipedia).
  • Understanding and using HD video
    Paper published by Adobe Systems Inc.
  • High Definition recording formats
  • Apple H.264 Format
    H.264 uses the latest innovations in video compression technology to provide incredible video quality from the smallest amount of video data. (Published in the Apple website)
  • Video compression technology - H.264 explained