Patent ID: 7697411

Claim:
A digital broadcasting transmitter for transmitting orthogonal frequency division multiplexing (OFDM) signals through a broadcasting network having a plurality of transmission channels, the OFDM signals being obtained by modulating a plurality of transport streams, the digital broadcasting transmitter comprising: a transmitting device which transmits the OFDM signals in a connected transmission in the broadcasting network, wherein-an the OFDM signals comprising a plurality of OFDM segments including OFDM symbols generated in a time base direction for the plurality of transmission channels and multiplexed in a frequency direction, the plurality of OFDM segments multiplexed in the frequency direction and processed with a simultaneous Inverse Fast Fourier Transform (IFFT) to generate the OFDM signals; and the transmitting device further transmitting control information, the control information including information concerning a physical configuration of a transport stream supplied by the broadcasting network and the features of the broadcasting network, wherein the control information further includes a connected transmission descriptor for coordinating the plurality of transmission channels subject to the connected transmission, the connected transmission descriptor comprising: information indicating whether a first data transport stream contained in an upper adjacent transmission channel op a higher frequency than a current transmission channel is present, information indicating whether a second data transport stream contained in a lower adjacent transmission channel on a lower frequency than the current transmission channel is present, and information indicating whether the first data transport stream contained in the upper adjacent transmission channel and the second data transport stream contained in the lower adjacent transmission channel are synchronously modulated or differentially modulated.