A digital data transmission apparatus and a transmission method thereof in accordance with the present invention includes a reproduction section for reproducing digital data of n (n is an integer of 2 or more) channels from a recording medium, a multiplexing section for dividing one frame in a television...http://www.google.com.au/patents/US6865228?utm_source=gb-gplus-sharePatent US6865228 - Digital data transmission apparatus and method for multiplexing multiplexing multi-channel video data within active video periods
