a digital cable broadcast receiver and a method for automatically processing caption data of various standards and types , is disclosed . the digital broadcast receiver includes : a demultiplexer for dividing a received broadcast stream into video data , audio data , supplementary information ; a controller for determining whether caption data included in the video data is digital caption data or analog caption data on the basis of caption information included in the supplementary information , and outputting a control signal according to a result of the determining ; a digital caption decoder for extracting and decoding digital caption data from the video data according to the control signal ; and an analog caption decoder for extracting and decoding analog caption data from the video data according to the control signal .