Patent ID: 7317738
Filing Date: 2008-01-08
Classification: G06T,H03M,H04L,H04N

Abstract:
1. A data receiving method for receiving information data containing additional information data therewith, transmitted by a data transmission method comprising the steps performed at a transmitter side of: preparing a data frame of said information data into which the additional information data is to be embedded, embedding said additional information data plural times into said data frame, as an electronic watermark, repetitively and separately in said data frame, and transmitting said data frame of the information data embedded in said data frame with the repetitive and separate additional information data; said data receiving method comprising the steps performed at a receiver side of: receiving the transmitted data frames of information data embedded in said data frame with the repetitive and separate additional information data therein, detecting the repetitive and separate additional information data embedded in said data frame from said transmitted data frames of information data, and determining said additional information data based on repetitiveness of the additional information data detected, wherein said determining step includes a step of: determining said additional information data based on a majority rule of the repetitive and separate additional information data embedded in said data frame.