system
Given the following post, respond as if you're commenting on Reddit:
human
Why does it take so much longer to tune to a digital channel than an analog one?
gpt
It doesn't take longer to tune in, however it does tak longer to display an image.  Digital image streams are generally 'differential' streams, that is, since each frame is so similar to the one before it, it's easier to compress and transmit only the differences between each frame. Once in a while, a 'key frame' is transmitted, which is essentially a whole frame, not just the differences. Until your receiver gets a key frame, or until it gets enough of the stream to build a whole picture (i.e. all pixels have changed since tuning in) it just displays a blank.