APPARATUS AND METHOD FOR CODING VIDEO, AUDIO AND ADDITIONAL DATA ACCORDING TO CONDITIONAL ACCESS OF TERRESTRIAL DMB AND CONDITIONAL ACCESS SYSTEM USING THE SAME

摘要

Provided is an apparatus for coding a video, an audio and additional data according to a conditional access of terrestrial DMB. The apparatus includes an analyzing unit for analyzing input stream; a scrambling control unit for selecting a stream to be scrambled according to a selection signal; a transport stream de-multiplexing unit for de-multiplexing the input stream received from the analyzing unit, parsing an audio, a video and additional data classified by a packet identifier (PID), and outputting a stream to be scrambled, a stream not to be scrambled and the packet identifier (PID) for the stream to be scrambled according to selection of the scrambling control unit; a control word generating unit for generating a control word; a scrambling unit for scrambling the stream to be scrambled which is outputted from the transport stream de-multiplexing unit based on the control word generated in the control word generating unit; a conditional access data generating unit for receiving the control word from the control word generating unit and generating conditional access data; and a transport stream re-multiplexing unit for receiving and re-multiplexing the stream to be scrambled from the scrambling unit, the stream not to be scrambled from the transport stream de-multiplexing unit.