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High-definition video (HD video) is video of higher resolution and quality than standard-definition. While there is no standardized meaning for high-definition , generally any video image with considerably more than 480 vertical scan lines (North America) or 576 vertical lines (Europe) is considered high-definition.
Primarily used for MP3, however may also include high-quality images and videos. Stored on microSD or microSDHC. Blu-spec CD Digital. PCM: 2016 Ultra HD Blu-ray: Back of a triple layer Ultra HD Blu-Ray Disc Digital H.265/MPEG-H Part 2 (HEVC). Dolby TrueHD, DTS-HD Master Audio
The quality the codec can achieve is heavily based on the compression format the codec uses. A codec is not a format, and there may be multiple codecs that implement the same compression specification – for example, MPEG-1 codecs typically do not achieve quality/size ratio comparable to codecs that implement the more modern H.264 specification.
Progressive scanning reduces the need to prevent flicker by anti-aliasing single high contrast horizontal lines. [5] [6] It is also easier to perform high-quality 50<->60 Hz conversion and slow-motion clips with progressive video.
Researchers at NHK also developed a high-quality up-converter, which estimates the other two color components to convert the output into full resolution video. [ 51 ] Also in May 2012, NHK showed the ultra-high-definition imaging system it has developed in conjunction with Shizuoka University, which outputs 33.2-megapixel video at 120 fps with ...
Stock footage companies began to emerge in the mid-1980s, offering clips mastered on Betacam SP, VHS, and film formats.Many of the smaller libraries that specialized in niche topics such as extreme sports, technological or cultural collections were bought out by larger concerns such as Corbis or Getty Images over the next couple of decades.
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Video quality can be measured with formal metrics like peak signal-to-noise ratio (PSNR) or through subjective video quality assessment using expert observation. Many subjective video quality methods are described in the ITU-T recommendation BT.500. One of the standardized methods is the Double Stimulus Impairment Scale (DSIS).
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