Transmitting system and receiving system for processing stream, and stream processing methods thereof

A receiving system comprising:

• a robust stream processor for, upon receiving a transport stream, detecting a robust stream from the transport stream and trellis-decoding the robust stream;
• a Cyclic Redundancy Check (CRC) detector for checking for error based on CRC bits of the stream output from the robust stream processor;
• a Reed-Solomon (RS) decoder for RS-decoding the stream using the error check result of the CRC detector;
• and
• a derandomizer for derandomizing the RS-decoded stream.

A stream processing method of a transmitting system, the method comprising:

• when receiving a first stream, making a space in the first stream to insert a second stream;
• when receiving the second stream, Reed-Solomon (RS)-encoding the second stream;
• Cyclic Redundancy Check (CRC) processing to convert the RS-encoded second stream to a stream comprising an added CRC bit sequence;
• and
• constituting a transport stream by inserting the stream to the space in the first stream.

A stream processing method of a receiving system, the method comprising:

• when receiving a transport stream, robustly processing the stream by detecting a robust stream from the transport stream and trellis-decoding the robust stream;
• Cyclic Redundancy Check (CRC)-detecting by checking for error based on CRC bits of the robust stream;
• Reed-Solomon (RS)-decoding the stream using the error check result;
• and
• derandomizing the RS-decoded stream.