Patent ID: 7023992
Filing Date: 2006-04-04
Classification: H04N

Abstract:
1. A data multiplexing device which multiplexes a plurality of data elements, each data element comprising at least a portion of a data program to be output at a receiving device, all of said corresponding data elements being output substantially simultaneously to form an output data program, and transmits said multiplexed data elements as a transport data stream, comprising: scramble key generation means for generating a plurality of scramble keys, one corresponding to each of said plurality of corresponding, and substantially simultaneously output data elements, wherein each of said scramble keys is updated at predetermined intervals; scramble means for selectively scrambling each of said plurality of substantially simultaneously output data elements by using said corresponding one of said scramble keys generated by said scramble key generation means to scramble a corresponding one of each of said plurality of substantially simultaneously output data elements; and encoder controlling means for assigning higher or lower encoding bit rates to each of a plurality of encoders when encoding each of said plurality of data elements based on a bit rate generated from each of said plurality of data elements so that said encoder controlling means is capable of managing all different generated bit rates without sacrificing quality of said output data program.