NONLINEAR QUANTIZATION METHOD AND NONLINEAR INVERSE QUANTIZATION METHOD

摘要

PURPOSE: To provide the nonlinear quantization method by reducing a quantization error more than a conventional nonlinear quantization method. ;CONSTITUTION: A nonlinear function f() is fed to a quantization value calculation device 31 from a nonlinear function block 33 and an input signal representing a quantization level number is fed together with quantization data via an input terminal 11. A quantization value calculation device 31 calculates a quantization value as to each quantization level and the obtained quantization value is fed to a quantization device 32. Quantized data are fed to the quantization device 32 and each data is quantized to a quantization level of the quantization value closest among sets of quantization values at an equal interval received from the quantization value calculation device 31.;COPYRIGHT: (C)1996,JPO