a media data processing apparatus includes an input unit that inputs media data and intellectual property management data for managing intellectual property of the media data , a first encoding unit that encodes the media data , a second encoding unit that encodes the intellectual property management data , and a transmission unit that transmitted in packets the encoded media data , first timing information that controls decoding timings for the media data , the encoded intellectual property management data , second timing information that controls decoding timings of the encoded intellectual property management data , and synchronizing information for synchronizing the intellectual property management data and the media data .