Patent ID: 7474236

Claim:
A method of transmitting digital data, which comprises the steps of; forming first word sequence data and second word sequence data by means of subjecting parallel data, which are constituted with first, second and third data sequences each constituting 12-bit word sequence and multiplexed in parallel with one another to form a digital video signal, to bit-dividing in which each 12-bit word contained in each of the 12-word sequences is divided into an upper 10-bit portion and a lower 2-bit portion, obtaining identification data representing one of the first, second and third data sequences, to which one of the 12-bit words containing specific 10 bits corresponding to a predetermined forbidden code belongs, when one of divided upper 10-bit portions contains the specific 10 bits, replacing the specific 10 bits with additional 10 bits which do not correspond to the predetermined forbidden code when the identification data are obtained, replacing also 2 bits contained in one of divided lower 2-bit portions obtained from the 12-bit word which had contained the specific 10 bits with predetermined 2 bits which are prepared for replacing when the identification data are obtained, arranging in sequence 10-bit words each constituted with the divided upper 10-bit portion and at least one 10-bit word constituted with the additional 10 bits to produce the first word sequence data when the identification data are obtained, and arranging in sequence 10-bit words each constituted with 10 bits which include the divided lower 2-bit portions and the identification data and at least one 10-bit word constituted with 10 bits which include at least one group of the predetermined 2 bits and the identification data to produce the second word sequence data when the identification data are obtained; converting the first word sequence date into first serial data and the second word sequence data to second serial data; and transmitting the first and second serial data.