Divided data transmitting and receiving system

A receiving method for receiving and processing a first transmission signal and a second demodulation output obtained through demodulation of a second transmission signal different from the first transmission signal, and outputting a resultant as a selected stream, the method comprising:

• a first demodulating step of receiving and processing the first transmission signal as an input, and generating a first demodulation output;
• a combining step of generating a combination stream based on at least the first demodulation output and the second demodulation output;
• and
• a selecting step of receiving the first demodulation output and the combination stream as inputs, selecting and outputting one among the first demodulation output and the combination stream as the selected stream, wherein
• in the selecting step, the first demodulation output is selected in a receiving mode in single channel transmission, and the combination stream is selected in a receiving mode in multiple channel transmission.

A receiving method of receiving and processing a first transmission signal and a second demodulation output obtained through demodulation of a second transmission signal different from the first transmission signal, and generating a video output for a display, the method comprising:

• a first demodulating step of processing the first transmission signal, and generating a first demodulation output;
• a combining step of generating a combination stream based on at least the first demodulation output and the second demodulation output;
• and
• a back-end processing step of receiving at least the first demodulation output, the second demodulation output, and the combination stream as inputs, generating two video streams respectively based on the first demodulation output and the second demodulation output in a receiving mode in single channel transmission to output at least one of the two video streams as the video output, and generating one video stream based on the combination stream in a receiving mode in multiple channel transmission to output the one video stream as the video output.

A receiving LSI which receives and processes a first transmission signal and a second demodulation output obtained through demodulation of a second transmission signal different from the first transmission signal, and outputs a resultant as a selected stream, the receiving LSI comprising:

• a first demodulator receiving and processing the first transmission signal and generating a first demodulation output;
• a combiner generating a combination stream based on at least the first demodulation output and the second demodulation output;
• and
• a selector receiving the first demodulator output and the combination stream as inputs, and selecting and outputting one among the first demodulator output and the combination stream as the selected stream, wherein
• the selector selects the first demodulator output in a receiving mode in single channel transmission, and selects the combination stream in a receiving mode in multiple channel transmission.

A receiving LSI which receives and processes a first transmission signal and a second demodulation output obtained through demodulation of a second transmission signal different from the first transmission signal, and generates an output for a display, the receiving LSI comprising:

• a first demodulator receiving and processing a first transmission signal and generating a first demodulation output;
• a combiner generating a combination stream based on at least the first demodulation output and the second demodulation output;
• and
• a back-end processor receiving at least the first demodulation output, the second demodulation output, and the combination stream as inputs, separately processing the first demodulation output and the second demodulation output in a receiving mode in single channel transmission to generate two video streams and output at least one of the two video streams as the video output, and generating one video stream based on the combination stream in a receiving mode in multiple channel transmission to output the one video stream as the video output to the display system device.