Digital Audio Network Through Ethernet (DANTE) Level 1 Practice Exam

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In video encoding, what does the second number (middle number) in the encoding description represent?

The number of rows with luma information

The number of pixels in the first row with chroma information

The middle number in a video encoding description typically refers to the number of pixels in the chroma subsampling format, which is part of how video data is organized to balance quality and file size. In common formats such as 4:2:0, the first number indicates the number of luma (brightness) samples, while the second number indicates how many chroma (color) samples correspond to the first line of luma samples. This allows for a compression of color data, as the human eye is more sensitive to light and shade changes (luma) than it is to color variations (chroma).

In lighter formats like 4:2:2, the middle number specifies the number of chroma samples per each luma sample in the first row, hence correlating directly to chroma information. This understanding of video encoding is crucial for professionals in video production and broadcasting, as it directly impacts the quality and storage requirements of video content.

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The overall resolution of the video

The frame rate

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