O'Reilly logo

Digital Video and HD, 2nd Edition by Charles Poynton

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

4

Quantization

A signal whose amplitude takes a range of continuous values is quantized by assigning to each of several (or several hundred or several thousand) intervals of amplitude a discrete, numbered level. In uniform quantization, the steps between levels have equal amplitude. Quantization discards signal information lying between quantizer levels. Quantizer performance is characterized by the extent of this loss. Figure 4.1 shows, on the left, the transfer function of a uniform quantizer.

image

Figure 4.1 A Quantizer transfer function is shown on the left. The usual 0 to 255 range of quantized R’G’B’ components in computing is sketched on the ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required