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It explains that high-definition refers to video resolutions that have a higher pixel density than standard-definition (SD) video, resulting in sharper and more detailed images. The page discusses various HD standards, including 720p, 1080i, and 1080p, as well as the newer 4K and 8K resolutions. It explains the differences between interlaced and progressive scanning and explores the aspect ratios commonly used in HD video production. The article also delves into the various video codecs used to compress and decompress HD video, such as H. 264 and HEVC (High-Efficiency Video Coding). It highlights the importance of these codecs in reducing file size without significant loss of image quality. Furthermore, the page explores the development and adoption of HD video in various fields, including television broadcasting, home entertainment, and digital cinematography. It discusses the transition from analog to digital HD broadcasting and the availability of HD content through cable and satellite providers. The article also covers the range of display technologies used in HD video, including plasma, LCD, and OLED screens, as well as the emergence of high dynamic range (HDR) and wide color gamut (WCG) technologies. It explains their role in enhancing the visual experience by providing a broader range of colors and more detailed contrast. Additionally, the page discusses the challenges involved in producing and transmitting HD video, such as the need for high-bandwidth connections and sufficient storage capacity. It also provides information on the audio formats commonly used in conjunction with HD video, such as Dolby Digital and DTS. Overall, the Wikipedia page on high-definition video offers a comprehensive overview of the technology and its various aspects. It serves as a valuable resource for anyone interested in understanding the history, standards, and advancements in HD video production and consumption.