Quantizer designed by using human visual sensitivity

Details Quantizer designed by using human visual sensitivity Quantizer designed by using human visual sensitivity

1994-07-27

1996-09-17

Young, Brian K.

Coded data generation or conversion

Quantizer

H03M 100

Patent

active

055572766

ABSTRACT:
A quantizer designed by using human visual sensitivity is disclosed, in which when postprocessing is done after inverse quantization an optimum visual sensitivity function for a system involving the postprocessing is obtained for doing quantization by using that visual sensitivity function.
Where the postprocessing that is executed after the inverse quantization consists of a filtering process with a characteristic L(.omega.) (.omega. being the frequency) and a 1:2 interpolation process, denoting the optimum visual sensitivity as the output result by W(.omega.) as shown in FIG. 2, the optimum equivalent sensitivity function W'(.omega.) is given as

REFERENCES:
patent: 5333012 (1994-07-01), Singhal et al.

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