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720p, also called "HD ready," was the standard DVD video format, while 1080i and 1080p, called "Full HD," were most often used HD broadcasts. Since early HD televisions only supported 1080i, the standard HD broadcast format was 1080i. It was not until Blu-ray discs became available that 1080p became standard. Since "HD" refers to any resolution greater than standard definition, it also encompasses higher resolutions like 4K and 8K. However, to avoid ambiguity, 4K resolution (3840x2160) is ... Looking for the definition of HD? Find out what is the full meaning of HD on Abbreviations.com! 'High Definition' is one option -- get in to view more @ The Web's largest and most authoritative acronyms and abbreviations resource. HD - Frequently Asked Questions What is the full form of HD in Information Technology, Electronics, Computer Hardware, Physics Related? Expand full name of HD. What does HD stand for? Is it acronym or abbreviation? HD definition: 1. abbreviation for high-definition: used to describe a system for showing very clear pictures on a…. Learn more.