Low cost VSB encoder and RF modulator for supplying a substantially 6 MHZ VSB signal to digital television receiver

A method of supplying a compressed digital signal to a digital television receiver comprising:

• encoding a baseband signal in a digital television format, wherein the baseband signal has a symbol frequency;
• increasing the symbol frequency of the encoded baseband signal to produce an intermediate frequency signal, wherein the increasing of the symbol frequency of the encoded baseband signal includes three interpolations by two of the encoded baseband signal;
• and,
• modulating the intermediate frequency signal with a channel selection frequency signal so as to produce an output signal having the frequency of a selected channel.

A method of producing an electrical signal comprising the following:

• (i) encoding a signal in a digital television format, wherein the signal has a symbol frequency f1;
• (ii) shifting the frequency of the encoded signal by an amount permitting root raised cosine filtering;
• (iii) root raised cosine filtering the shifted encoded signal;
• (iv) increasing the frequency of the filtered and shifted encoded signal to produce an intermediate frequency signal;
• and,
• (v) modulating the intermediate frequency signal with a channel selection frequency signal so as to produce the electrical signal at the frequency of a selected channel.