An electronic device that samples a varying quantity (e.g. a waveform) and generates a digital response(noun)
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Use "quantizer" in a sentence
"· Intra: all macroblock types (16x16, 8x8, and 4x4 with all predictions) · Inter P: all partitions (from 16x16 down to 4x4) · Inter B: partitions from 16x16 down to 8x8 (including skip/direct) · Ratecontrol: optional VBV, single or multipass ABR, constant quantizer"
"Ratecontrol: constant quantizer, constant quality, single or multipass ABR, optional VBV"
"If you select Video Quality it ecodes single pass and the slider sets the quantizer."