Patent ID: 7058087

Claim:
A computer implemented method for generating a multiplexed sequence, the method comprising the steps of: receiving at least one basic media data unit sequence; determining modification priorities for a plurality of basic media data units belonging to the at least one basic media data unit sequence; selecting basic media data units to be modified, in response to the modification priority of each basic media data unit; modifying each of the selected basic media data units; wherein a modified selected basic media data unit is smaller than the corresponding selected basic media data unit; and multiplexing the modified selected basic media data units and non-selected basic media data units to provide the multiplexed sequence, wherein: basic media data units are arranged in groups and wherein the modification priority of a basic media data unit belonging to a group is responsive to a combination of quality degradation of basic media data units belonging to the group, and at least some of the basic media data units include temporal difference information representative of temporal differences between at least two basic media data units belonging to the same basic media data unit sequence; and wherein a modification priority of a basic media data unit is responsive to an amount of temporal difference information within the basic media data unit.