فيديو عالي الوضوح

فيديو عالي الوضوح (بالإنجليزية: High Definition Video)‏ ويُعرف اختصارًا بإتش دي فيديو (HD video) حيث يشير إلى أي نظام فيديو ذو دقة أعلى من الفيديو قياسي الوضوح (SD video)، ودقة العرض الأكثر شيوعًا هي 720×1280 بكسل (720p) أو 1080×1920 بكسل (1080i/1080p)؛ فعدد الخطوط العمودية في التلفاز عالي الوضوح (HDTV) هي 1080 أو 720 خط.[1][2][3] بالمقابل في التلفاز الرقمي الاعتيادي فإن عدد الخطوط هو 480 أو 576 .ويُبث هذا الفيديو بشكل جيّد فضائيًّا باستخدام معيار dvb-s2.

الأنماط الشائعة للفيديو عالي الوضوح

وضعية الفيديو حجم الإطار بالبكسل (W×H) بكسل لكل صورة1 نوع المسح مُعدّل الإطار (هرتز)
720p (معروف أيضًا باسم HD Ready) 1,280×720 921,600 مسح تقدمي 23.976, 24, 25, 29.97, 30, 50, 59.94, 60, 72
1080i (معروف أيضًا باسم Full HD) 1,920×1,080 2,073,600 مسح متداخل 25 (50 fields/s), 29.97 (59.94 fields/s), 30 (60 fields/s)
1080p (معروف أيضًا باسم Full HD) 1,920×1,080 2,073,600 مسح تقدمي 24 (23.976), 25, 30 (29.97), 50, 60 (59.94)
1440p (معروف أيضًا باسم Quad HD) 2,560×1,440 3,686,400 مسح تقدمي 24 (23.976), 25, 30 (29.97), 50, 60 (59.94)

انظر أيضاً

المراجع

  1. ^ "XBox Video". Microsoft. مؤرشف من الأصل في 2020-05-05. اطلع عليه بتاريخ 2012-11-08.
  2. ^ "Live Streaming Service". StreamShark. مؤرشف من الأصل في 2017-04-10. اطلع عليه بتاريخ 2015-10-08.
  3. ^ "Vimeo - Compression guidelines on Vimeo". Vimeo. مؤرشف من الأصل في 2013-05-13. اطلع عليه بتاريخ 2009-10-16. Use 2000 kbits/sec for standard definition 4:3 video, 3000 kbits/sec for widescreen DV, or 5000 kbits/sec for high definition footage.
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