The basic concept behind high-definition television is actually not to increase the definition per unit area… but rather to increase the percentage of the visual field contained by the image.

高清晰度电视的基本概念实际上并不是提高每个单元域的清晰度，而更多是提高图像中包括的可视域的百分比。

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But officials said the contrast agent given to them before their scans to enhance image definition was being treated as a possible cause.

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The app, released in several languages, allows users to scroll over a high-definition image of the shroud and find out more about its history and religious significance.

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This makes it possible to record approximately 12 hours of terrestrial digital TV broadcasts or approximately 8.6 hoursof BS digital TV broadcasts in DR mode (recorded with the image quality exactly as broadcast), or store other long-duration video content, all on a single disc, while preserving the same high-definition image quality of the original.

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