Patent ID: 6973118
Filing Date: 2005-12-06
Classification: H04B,H04H,H04L

Abstract:
1. A digital broadcasting apparatus for generating a digital broadcasting signal based on data of source information and modulating the same to a predetermined broadcasting frequency for output, comprising: a sub-signal generating circuit for generating a sub-signal for controlling signal transmission; a random sequence generating circuit for generating a pseudo-random sequence using an initial value of a random number code set based on said broadcasting frequency; a sub-signal modulating circuit for modulating the sub-signal using the pseudo-random sequence generated by the random sequence generating circuit; and a modulating circuit for performing modulation according to a predetermined modulation scheme using a main signal generated based on the data of source information and output signal of the sub-signal modulating circuit, wherein a bandwidth of said broadcasting frequency is divided into a plurality of channels with each channel of said plurality of channels being assigned a predetermined channel number, and wherein said random sequence generating circuit sets an initial value of a random number code for generating said pseudo-random sequence based on said channel number.