Additional information superposing method, information...

Details Additional information superposing method, information... Additional information superposing method, information...

H - Electricity

04

L

H04L 9/32 (2006.01) G06T 1/00 (2006.01) G11B 20/00 (2006.01) H04N 7/08 (2006.01) H04N 7/088 (2006.01) H04L 12/64 (2006.01)

Patent

CA 2289399

An image signal to be outputted is divided into two areas or a first area and a second area. In an electronic watermarking information forming section (WM forming section), a spectrum spread signal (electronic watermarking information) is formed as the first additional information so as to be superposed on the first area of the image signal. The spectrum spread signal is superposed on the first area of the image signal by an electronic watermarking information superposing section (WM superposing section). Moreover, in the case where the image signal is recorded on a recording medium, for example, the second additional information is newly superposed on the second area of the image signal. Thus, deterioration of the information signal is suppressed at minimum, and first and second additional information are superposed on the information signal to be capable of transmitting the information signal.

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