Data receiving-processing apparatus and method, and broadcasting method

A data receiving-processing apparatus for use by a subscriber and for receiving data transmitted thereto and processing the data, said apparatus comprising:

• receiving means for receiving data and for receiving an extended function program relating to added functions of the apparatus transmitted thereto, said extended function program being transmitted in scrambled and compressed states;
• processing means for processing the data received by said receiving means;
• storage means for storing an ID code to identify the data receiving-processing apparatus and for storing a basic program used to execute the data processing by said processing means, said basic program having a branch for said extended function program;
• decision means for making a decision as to whether said ID code stored in said storage means has a predetermined content;
• descrambling means for descrambling said transmitted extended function program;
• and
• decompression means for decompressing the descrambled extended function program,
• wherein said processing means processes the data received by said receiving means in accordance with said basic program stored in said second storage means such that only when a result of the decision made by said decision means signifies that the ID code stored in said storage means has the predetermined content, said scrambled extended function program is descrambled and decompressed and read out at said branch in said basic program, and said processing means processes the data in accordance with the read-out extended function program.