Patent ID: 7301969
Filing Date: 2007-11-27
Classification: H04L

Abstract:
1. A transmitting apparatus for transmitting a transmission signal including main data modulated by a designated modulation scheme and a TMCC signal having a SYNC pattern representing a header portion, at least a pair of a sub-SYNC pattern and identification information thereof, arranged between said SYNC pattern and the SYNC pattern of the next frame, and a bit pattern representing setting information indicating said modulation scheme, said apparatus comprising: a pre-processor for pre-processing an input compressed data word string to generate pre-processed frames; a main data modulator, operable in synchronism with said pre-processor, for generating a main data frame string by modulating said pre-processed frames N frames by N frames by said designated modulation scheme, said N being a positive integer determined by the modulation scheme and the convolutional coding rate; a TMCC generator, operable in synchronism with the generation of each of said main data frames, for generating a corresponding TMCC signal; an OFDM modulator connected to receive said main data frame and said corresponding TMCC signal; a transmission high-frequency unit connected to said OFDM modulator; a receiving high-frequency unit; an OFDM demodulator connected to said receiving high-frequency unit for demodulating said main data frame string and the TMCC signal corresponding to each of said main data frames; a TMCC regenerator for extracting said setting information from said demodulated TMCC signal and generating a frame signal indicating the head of each of said main data frames from selected one of said SYNC pattern and said sub-SYNC pattern and the identification information thereof in said demodulated TMCC signal; a main data demodulator for regenerating said pre-processed frames from each of said demodulated main data frames based on said frame signal and said setting information; a circuit for generating the head position of each of said pre-processed frames from said frame signal; and an inverse processor for processing each of said processed frames starting with the head position thereof inversely to said pre-processing thereby to regenerate said input compressed data word string.