Digital broadcasting transmitter, digital broadcasting receiver, and method for composing and processing streams thereof

A digital broadcasting transmitter comprising:

• a data preprocessor which generates a transport stream including a first data area, in which first mobile data is placed, and a second data area, in which second mobile data is variably placed according to mode, and performs serially concatenated convolution code (SCCC) coding on the transport stream;
• and
• a transmitter which transmits the SCCC coded transport stream,
• wherein the SCCC coding is performed by at least one of a ½ rate, a ⅓ rate, and a ¼ rate.

A stream processing method of a digital broadcasting receiver, the method comprising:

• receiving a stream generated by including a first data area, in which first mobile data is placed, and a second data area, in which second mobile data is variably placed according to mode, and performing serially concatenated convolution code (SCCC) coding on the stream;
• demodulating the stream;
• equalizing the demodulated stream;
• and
• decoding at least one of the first mobile data and the second mobile data from the equalized stream,
• wherein the SCCC coding is performed by at least one of a ½ rate, a ⅓ rate, and a ¼ rate.

A digital broadcasting receiver comprising:

• a receiver which receives a stream generated by including a first data area, in which first mobile data is placed, and a second data area, in which second mobile data is variably placed according to mode, and performing serially concatenated convolution code (SCCC) coding on the stream;
• a demodulator which equalizes the demodulated stream;
• and
• a decoder which decodes at least one of the first mobile data and the second mobile data from the equalized stream,
• wherein the SCCC coding is performed by at least one of a ½ rate, a ⅓ rate, and a ¼ rate.