from The Century Dictionary and Cyclopedia
- n. A masons' level.
Sorry, no etymologies found.
Contrary to popular belief, a fixed frame-level quantizer (set by the user) does not deliver a constant level of quality.
Quantization is performed by taking each of the 64 frequency values of the DCT block, dividing them by the frame-level quantizer, then dividing them by their corresponding values in the quantization matrix.
The frame-level quantizer is a number from 0 to 31 (although encoders will usually omit / disable some of the extreme values) which determines how much information will be removed from a given frame.