Apparatus and method for processing transport stream in digital cable broadcasting system and delay controlling apparatus for the same

An apparatus for controlling a delay in a digital cable broadcasting system, said apparatus to control the delay for remultiplexing a descrambled data signal that is converted from a scrambled data signal, and a non-scrambled data signal, the apparatus comprising:

• a system clock signal controller for receiving first and second valid signals, calculating a predetermined delay time, and generating a system time, the first and second valid signals being valid signals of the scrambled data signal and the non-scrambled data signal, respectively;
• a time stamp controller for receiving the descrambled data signal, the non-scrambled data signal and TS valid signals corresponding to the descrambled data signal and the non-scrambled data signal, and generating third and fourth valid signals and the respective data signals, the third and fourth valid signals being generated by regulating the values of the corresponding valid signals according to the system time output from the system clock signal controller;
• a first output controller for outputting the descrambled data signal received from the time stamp controller when the third valid signal output from the time stamp controller is matched with the system time output from the system clock signal controller;
• and
• a second output controller for outputting the non-scrambled data signal received from the time stamp controller when the fourth valid signal output from the time stamp controller is matched with the system time output from the system clock signal controller.

An apparatus for controlling a delay in a digital cable broadcasting system, said apparatus to control the delay for remultiplexing a descrambled data signal that is converted from a scrambled data signal, and a non-scrambled data signal, the apparatus comprising:

• an offset controller for receiving first and second valid signals, calculating a predetermined offset time according to a required descrambling time using a third valid signal, and outputting the predetermined offset time as a system time, the first and second valid signals being valid signals of the scrambled data signal and the non-scrambled data signal, respectively, the third valid signal being a valid signal of the descrambled data signal;
• a first output controller for storing the descrambled data signal, and outputting it when the third valid signal is matched with the system time output from the offset controller;
• and
• a second output controller for storing the non-scrambled data signal, and outputting it when the second valid signal is matched with the system time output from the offset controller.

An apparatus for controlling a delay in a digital cable broadcasting system, said apparatus to control the delay for remultiplexing a descrambled data signal that is converted from a scrambled data signal, and a non-scrambled data signal, the apparatus comprising:

• a first counter controller for receiving a first valid signal, counting for a predetermined time, and generating a first count end signal at the end of counting, the first valid signal being a valid signal of the scrambled data signal;
• a second counter controller for receiving a second valid signal, counting for a predetermined time, and generating a second count end signal at the end of counting, the second valid signal being a valid signal of the non-scrambled data signal;
• a first output controller for storing the descrambled data signal, and outputting it upon receiving the first count end signal from the first counter controller;
• and
• a second output controller for storing the non-scrambled data signal, and outputting it upon receiving the second count end signal from the second counter controller.

A method for processing a TS in a digital cable broadcasting system, said method demultiplexing a digital cable broadcasting data signal received in a TS format, descrambling a scrambled signal, and remultiplexing the descrambled signal in the TS format, the method comprising:

• (a) receiving TSs and dividing them into a scrambled data signal and a non-scrambled data signal;
• (b) receiving the scrambled data signal, descrambling it, and outputting the descrambled data signal;
• (c) receiving the non-scrambled data signal and the descrambled data signal, delaying them by a predetermined time, and outputting the delayed data signals;
• and
• (d) receiving the delayed data signals, multiplexing them, and outputting the multiplexed data signals in the TS format.