A digital TV equipped with a general-purpose CPU having a higher performance than that of an embedded CPU and a signal processing method thereof are provided. According to the digital TV and method, if the digital TV is turned on, digital broadcast data is received and decoded irrespective of whether or not system booting is completed, and while the system booting is performed, the decoded signal is made to be output to a display apparatus. Accordingly, after the digital TV is turned on, a user does not need to wait until the system booting is completed and can watch the digital broadcasting while the booting process is being performed.