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<\/p>\nWhat is HD video and what does 1080p, 720p mean?<\/p>\n
<\/p>\n
High definition (abbreviated HD) is translated from English as “high definition”, “high definition”. The HD direction is divided into two branches: HDTV (transmission by satellite, terrestrial terrestrial and terrestrial cable) and HDV, high definition video (reproduction of content of physical media such as Blu-ray or HD DVD).<\/p>\n
\nAs you know, the DVD format with its resolution 720×576 (PAL) or 720×480 (NTSC) is adopted for standard definition (SD – Standard Definition). HD refers to video with a resolution of at least 1280×720 pixels.<\/p>\n
What does 720p, 1080p, 1080i mean?<\/p>\n
This input stands for high definition video and indicates how many vertical pixels the frame of this video has. So 720p is high definition video with 720 vertical pixels (1280×720 image resolution). 1080p video is Full HD video, also known as high definition video, with 1080 vertical pixels and an image resolution of 1920 x 1080. The letters after the numbers indicate the recording format of the video frame. p – progressive format, i – interlaced.<\/p>\n
Why do they write 720p \/ 1080p in the title, but in fact offer video materials in incomprehensible resolutions?<\/p>\n
There are 720p (1280×720) and 1080p (1920×1080) high definition resolution standards, which are designed for the 16: 9 aspect ratio common to modern digital video equipment. This aspect ratio is due to the fact that it is more efficient to fit the picture of the most common TV \/ video \/ movie formats. When digitizing the signal according to the 720p \/ 1080p high definition video standards, black stripes are pasted to the image, if necessary, from above \/ below to record on high definition optical media \/ broadcast on satellite television channels of High Definition.
\nWhen re-compressing a video, saving these black multiplicity bars is usually useless, so they are usually cut off and only the usable area of \u200b\u200bthe signal image remains: 1280×544, 1280×536, 1280×688, 1920×800, 1920×860, etc. All of these resolutions are 720p \/ 1080p in the original aspect ratios conceived by the filmmakers who created the footage.<\/p>\n","protected":false},"excerpt":{"rendered":"
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