Further description of resolution, frame rate, and bit rate
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Resolution
A viewable digital image is composed by series of spots (pixels). The more
pixels contained, the clearer the image will be. Higher resolution means more
pixels are contained within the image. High resolution = More pixels = Clearer
image.
50x50 means the picture is composed by 2,500 pixels. The quality of a 25x25
picture is only 1/4 of 50x50’s. The quality will become 1/16 if the resolution is
12x12.
If you enlarge 12x12 picture, 25x25 picture, and 50x50 picture to the same size,
you will see the difference.
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->
->
50x50
50x50
25x25
50x50
12x12
50x50
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Frame Rate
A video is a continuous series of still pictures (movie/ film). By connecting all
the still pictures one by one, it becomes a movie. Each still picture in the movie
is known as “frame”. The more frames a video has, the easier and smoother to
play the video.
We use “frame per second (fps)”to indicate the smoothness of a video.
Changing the frame rate of NAC-300 will not make any difference on the
recorded video file size, but will influence the smoothness of the video.
Selecting higher frame rate will reduce the video quality and lower frame rate
will increase the video quality.
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