Method of reducing quantization noise

Details Method of reducing quantization noise Method of reducing quantization noise

2005-10-14

2010-02-16

Barnie, Rexford N (Department: 2819)

Coded data generation or conversion

Quantizer

C380S200000

Reexamination Certificate

active

07663527

ABSTRACT:
There is described a system (10; 300) for processing an input signal (340) to generate a corresponding encoded output signal (380). The system (10; 300) includes a plurality of quantizing devices (30, 70; 350, 370) coupled in series, the system (10; 300being configured in operation to reduce tandem quantization noise arising therein by:(a) analyzing the system (10; 300) to determine signal regions (290) in which tandem noise errors occur; and(b) modifying one or more earlier quantizing devices (30; 350) in the system (10; 300) with backward correction to reduce tandem noise arising therein from said determined signal regions (290), said one or more earlier quantizing devices (30; 350) not including a last quantizing device (70; 370) in series the system (10; 300).

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