Method and apparatus for the transmission and reception of a multicarrier digital television signal

A METHOD AND APPARATUS FOR CODING A TELEVISION SOURCE SIGNAL THAT HAS A FIRST BANDWIDTH, IN A MULTIPLEX FREQUENCY SIGNAL THAT HAS A NARROW BANDWIDTH AND CONTAINS A PLURALITY OF MODULATED SUBPORTERS WITH DIGITAL INFORMATION. EACH OF SUCH SUBPORTERS HAS A WIDTH, A BANDWIDTH AND A CODING FEATURE THAT REFLECTS THE RELATIVE IMPORTANCE OF THE DIGITAL INFORMATION PROVIDED BY IT. THE MULTIPLEX FREQUENCY SIGNAL IS SUITABLE FOR USE IN A BROADCASTING ENVIRONMENT WHERE A CONVENTIONAL TELEVISION SIGNAL IS ALSO USED AND WHERE SUCH SUB-CARRIERS ARE POSSIBLE AS A RESULT OF A PROBLEM OF DISEASE. CONVENTIONAL. THE INVENTION ALSO INCLUDES A RECEIVER TO DECODE THE MULTIPLEX FREQUENCY SIGNAL AND TO PROVIDE A HIGH DEFINITION REPRESENTATION.