Transmission method, transmission system, sending device and reception device

In a data transmission system for transmitting video data and digital audio data from a data sending device to a data receiving device, the data transmission system comprising:

• said data sending device including:
• data division means for dividing digital audio data having a predetermined packet structure into units including a predetermined number of bits;
• encoding means for converting each unit of the digital audio data divided by said data division means into specific data to be encoded;
• and
• data transmission means for arranging the data encoded by said encoding means in blanking intervals of the video data to be synthesized and transmitting the synthesized data to a predetermined line, and
• said data receiving device including:
• separation means for separating the data arranged in the blanking intervals of the video data which are received through said transmission line;
• decoding means for decoding said encoded data separated by said separation means;
• and
• data assembly means for assembling the data decoded by said decoding means into the data with the original packet structure.

In a data sending device for sending video data and digital audio data, the data sending device comprising:

• data division means for dividing the digital audio data having a predetermined packet structure into units including a predetermined number of bits;
• encoding means for converting each unit of the digital audio data divided by said data division means into specific data to be encoded;
• and
• data transmission means for arranging the data encoded by said encoding means in blanking intervals of the video data to be synthesized and transmitting the synthesized data to a predetermined line.

In a data receiving device for receiving video data and digital audio data, the data receiving device comprising:

• separation means for separating data which are arranged in blanking intervals of video data received through a predetermined transmission line;
• decoding means for decoding the data separated by said separation means, which have been encoded by a predetermined code;
• and
• data assembly means for assembling the data decoded by said decoding means into the data with the original packet structure.