A digital content transmission and reception system that uses feedback and
retransmission of missing content is described. A content transmission
system broadcasts a complete set of digital content to a plurality of
content reception systems via a communication link. A content reception
system receives a corresponding incomplete set of digital content,
determines particular content portions that are missing, and provided
feedback indicating the missing content portions to the content
distribution system. The content distribution system then re-transmits
content based on the feedback.