14. The interactive television system according to claim 1 , wherein the processing unit is directed by embedded software instructions, software instructions included in a broadcast program or a combination of embedded and broadcast instructions.
14. The interactive television system according to claim 1 , wherein the processing unit is directed by embedded software instructions, software instructions included in a broadcast program or a combination of embedded and broadcast instructions. 15. The interactive television system according to claim 14 , wherein the embedded software instructions comprise signal processing software.