2. HD editing

2.1 Features specific to HD

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2.1.1 File speeds and weights

In high definition, the doubling of definition in both image dimensions, together with the use of a 16:9 aspect ratio, leads to a 5-fold increase in the number of pixels to be processed, compared with SD. In the 1080i/25 format chosen by France, we're reduced to a useful bitrate before compression of 1.036 Gbit/s. This data rate is not easily supported by hard disks, which have access time limitations. What's more, file sizes are too large for post-production...