Data transmitting method and receiving method, and video data transmitting device and receiving device

An apparatus for transmitting video data comprising:

• inputting means for inputting the video data for transmission and superposed data to be added to said video data;
• and
• encoding means for converting said video data input from said inputting means into serial data and encoding a plurality of bit strings, allocated to a video blanking period, along with the same superposed data.

A video signal receiving apparatus connected to an interface for digital display connection, comprising:

• receiving means for receiving digital video signals in which the same sort of the bit string is sent a plural number of times during a blanking period represented by a plural number of sorts of the bit strings;
• and
• audio data outputting means for outputting audio data based on said same sort of the bit string, sent a plural number of times, from said digital video signals received by said receiving means.

A video signal transmitting/receiving system for sending digital video signals from a transmitter to a receiver over one or a plurality of transmission channels;

• said transmitter converting the video signals for transmission into a bit string longer than the data length of a pixel making up said video signals, allocating a plurality of said bit strings to a blanking period during which data of the pixels in said bit string is not transmitted, and sending the same superposed data a plural number of times using said plural bit strings;
• said receiver extracting the specified bit strings indicating said blanking period from the received data and performing majority processing on the results of demodulation of the extracted bit string.

A computer-readable program for use with a computer, which computer converts video signals to be transmitted by an interface for digital display connection into a bit string longer than the data length of a pixel making up said video signals to enable data transmission, said computer-readable program causing said computer to operate as including

• means for allocating a plurality of bit strings to a blanking period during which the video signal in said converted bit string are not transmitted and
• means for transmitting the same superposed data a plural number of times using said plural bit strings allocated to one or a plurality of transmission channels.