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:
Mar. 13, 2012
Filed:
Mar. 01, 2007
Ryoichi Kawada, Fujimino, JP;
Osamu Sugimoto, Fujimino, JP;
Atsushi Koike, Fujimino, JP;
KDDI Corporation, Tokyo, JP;
Abstract
Picture having a band of 6 MHz is distributed to the set-top box (STB)via the compression encoder, the distribution server, and the network. The low-pass filterin the picture quality monitoring apparatusremoves high-frequency components of an inputted digital signal and inputs luminance signal, the band of which is limited to 4 MHz, into the PSNR calculator. The Y/C separatorseparates a luminance signal from NTSC analog composite signal, which are sent out from the set-top box. The separated luminance signal has a band of 4 MHz. The PSNR calculatorcalculates PSNR between the luminance signal from the low-pass filterand the luminance signal from the Y/C separator