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:
Jun. 10, 2008
Filed:
Jul. 29, 2004
Osamu Sugimoto, Saitama, JP;
Ryoichi Kawada, Saitama, JP;
Atsushi Koike, Saitama, JP;
KDDI Corporation, Tokyo, JP;
Abstract
This invention is intended to reduce a line rate of a monitoring line necessary for transmission of a picture feature without complicating a system. A video signal x(n, n) of each block is subjected to spread spectrum by multiplying the video signal x(n, n) by a PN sequences S(n, n) (in a step S). The resultant video signal is orthogonally transformed by DFT, DCT, WHT, or the like (in a step S). An amplitude component A=|X(S, S)| of an arbitrary component (S, S) in a coefficient X(S, S) obtained by the steps Sand Sis extracted (in a step S), and the extracted amplitude component is quantized with a step size M (in a step S). The picture feature F[i] is given as a residue obtained under a modulus Nof a quantized typical value obtained by the quantization (in the step S) (in a step S).