The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 2013
Filed:
Sep. 02, 2008
Makoto Tsukamoto, Kanagawa, JP;
Jun Hirai, Tokyo, JP;
Ayataka Nishio, Kanagawa, JP;
Naomasa Takahashi, Chiba, JP;
Makoto Tsukamoto, Kanagawa, JP;
Jun Hirai, Tokyo, JP;
Ayataka Nishio, Kanagawa, JP;
Naomasa Takahashi, Chiba, JP;
Sony Corporation, , JP;
Abstract
An image processing apparatus which may include a grayscale modulator forming a ΔΣ modulator. The modulator may include an adder that adds the pixel value of an image and an output of a feedback arithmetic unit, a quantizing unit that quantizes an output of the adder and outputs a quantized value including a quantization error as the result of ΔΣ modulation, a subtractor that calculates the quantization error, and the feedback arithmetic unit that filters the quantization error and outputs the filtering result to the adder. The filter coefficient of filtering by the feedback arithmetic unit may be determined such that the amplitude characteristics of noise shaping by the ΔΣ modulator in a frequency band that is equal to or more than an intermediate frequency band are the inverse characteristics of the spatial frequency characteristics of the human eye.