摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a transmitter capable of compatibly satisfying an NTSC broadcasting and an HDTV broadcasting particularly in a satellite broadcasting and drastically reducing unreceivable zones within service areas of ground broadcasting in a receiver for receiving a digital modulated signal. <P>SOLUTION: The digital modulated signal includes a first data string and a second data string, and the first data string includes demodulating information for demodulating a modulated signal corresponding to the second data string. Based upon the demodulating information, the second data string is demodulated. <P>COPYRIGHT: (C)2004,JPO</p> |