Coded data generation or conversion – Digital code to digital code converters – To or from differential codes
Reexamination Certificate
2007-03-19
2008-08-12
Jeanglaude, Jean B (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from differential codes
C327S105000, C327S167000, C341S200000
Reexamination Certificate
active
07411527
ABSTRACT:
A noise shaping quantizer having a first noise shaping quantization unit for applying a first noise shaping operation on an input signal. The first noise shaping quantization unit includes a local quantizer that quantizes the input signal and outputs an output signal; an error accumulator that accumulates at least a part of a value based on the output signal based on at least one of a value based on the input signal and the value based on the output signal, outputs the remaining part, and outputs at least a part of the accumulated value based on the output signal based on at least one of a value based on another input signal and a value based on another output signal at a later clock; an adder to which the output signal and the output of the error accumulator are inputted; a subtractor to which the input signal and the output of the adder are inputted; a delay element to which an output of the subtractor is inputted; and another adder that adds an output of the delay element and an input from external, and outputs the sum to the first local quantizer.
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Naotake Kitahira, U.S. Appl. No. 11/655,061, filed Jan. 19, 2007.
Jeanglaude Jean B
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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