وفّر 50٪ من خلال الاشتراك السنوي في مجرة واحصل على تصفح لا محدود لأفضل محتوى عربي على الإنترنت.
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عبارة عن صيغة أقراص ضوئية مُصممة لتسجيل وتشغيل مقاطع الفيديو عالية الدقة وتخزين كميات ضخمة من البيانات، وجاءت لتستبدل صيغة دي في دي (DVD). تم تطوير صيغة بلو-راي بالتعاون بين عدة شركات هي هيتاشي وإل جي وباناسونيك وبايونير وفيليبس وسامسونج وشارب وسوني وتومسون. وقد أصبحت الصيغة المعتمدة للمحتوى عالي الدقة وتخزين البيانات الضوئي منتصرةً على صيغة إتش دي-دي في دي (HD-DVD) المدعومة من قبل شركة توشيبا.
يعود اسم صيغة بلو-راي من الاعتماد على شعاع ليزر أزرق للقراءة من القرص والكتابة عليه بدلاً من الليزر الأحمر المُستخدم في مشغلات دي في دي. ويبلغ طول موجة شعاع الليزر الأزرق 405 نانومتر؛ مما يمنحه القدرة على التركيز بشكل أضيق من الليزر الأحمر. وبالنتيجة يمكن لقرص بلو-راي تخزين كمية أكبر بكثير من البيانات على نفس المساحة البالغة 12 سنتيمتر؛ حيث تبلغ سعة القرص الواحد 27 جيجا بايت أو 13 ساعة من بيانات الفيديو المعيارية، مقارنةً بسعة تبلغ 4.7 جيجا بايت أو 133 دقيقة من بيانات الفيديو لقرص دي في دي.
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