Method and apparatus for processing a digital color video signal

A method of processing a digital signal comprising the steps of:

• sampling an analog signal at a predetermined frequency;
• converting the sampled signal into digitized form;
• forming a data block for every predetermined number of bits of said digital signal;
• adding an identification signal to each data block for identification thereof;
• and
• adding an error correcting signal to each of said identification signals.

A method of processing a digital signal comprising the steps of:

• sampling an analog signal at a predetermined frequency;
• converting said sampled signal into digitized form;
• forming a data word every m bits;
• and
• adding two check words P and Q to every n data words, each check word having m bits and said check words being formed by the equations:
• ##EQU10## where T.sup.-1, T.sup.-2,-T.sup.-(n-1),T.sup.-n,T.sup.1,T.sup.2,-,T.sup.n-1,T.sup.n are distinct, non-zero elements of a Galois field (2.sup.m).

Apparatus for processing a digital signal comprised of a plurality of N-bit words which have been code converted from a plurality of M-bit words in accordance with a predetermined mapping function, comprising:

• reconverting means for reconverting each of said N-bit words to a respective one of said M-bit words in accordance with said mapping function, with said plurality of reconverted M-bit words forming a data unit for every predetermined number of words thereof;
• first detecting means for detecting whether any of said M-bit words contain an error by failing to satisfy the mapping function when reconverted by said reconverting means;
• and
• first judging means for determining that each data unit that includes an M-bit word having an error is erroneous.

Apparatus for processing a digital signal, comprising:

• sampling means for sampling an analog signal at a predetermined frequency;
• converting means for converting the sampled signal into digitized form;
• forming means for forming a data block for every predetermined number of bits of said digital signal;
• first adding means for adding an identification signal to each data block for identification thereof;
• and
• second adding means for adding an error correcting signal to each of said identification signals.

Apparatus for processing a digital signal, comprising:

• sampling means for sampling an analog signal at a predetermined frequency;
• converting means for converting said sampled signal into digitized form;
• forming means for forming a data word every m bits;
• and
• adding means for adding two check words P and Q to every n data words, each check word having m bits and said check words being formed by the equations:
• ##EQU11## where T.sup.-1,T.sup.-2,-T.sup.-(n-1),T.sup.-n,T.sup.1,T.sup.2,-,T.sup.n-1,T.sup .n are distinct, non-zero elements of a Galois field (2.sup.m).