Transmitter and receiver

Abstract

The present invention provides a transmitter capable of transmitting attribute information of a program while maintaining a high level of secrecy. Specifically, a transmitter (100) in a transmission and reception system comprising the transmitter (100) for transmitting program contents (21) and attribution information (22) of program and a receiver (200) for receiving the program contents (21) and accumulating part or whole of the program contents (21) transmits meaning information (24) indicating the meaning and contents of the attribute information (22) in addition to the attribute information (22).

Description

[0001] This application is a division of U.S. patent application Ser. No. 09 / 913,360 filed on Oct. 9, 2001.TECHNICAL FIELD [0002] The present invention relates to a transmitter and a receiver and, more particularly, to a transmitter which transmits a program and attribute information of the program and a receiver which receives the program and accumulates part or whole of the program. BACKGROUND ART [0003] Transmission and reception systems are known which comprise a transmitter for transmitting program and attribute information of the program and a receiver for receiving the program and attribute information transmitted by the transmitter and for accumulating part of or whole of the program. [0004] In the transmission and reception system, the attribute information of a program transmitted by the transmitter is information indicating the type of information provided by the transmitter to users. [0005] A high level of secrecy is required for attribute information indicating the type...

AI Technical Summary

Benefits of technology

[0022] A method of reception according to the invention includes a step of receiving a program, attribute information, and meaning information, a step of acquiring user attributes that are the attributes of a viewer from a user attribute storing section for storing the same, and a step of accumulating part or whole of the program according to the attribute information that is interpreted based on the meaning information and the user attributes, thereby achieving the above-described object.

Problems solved by technology

However, there is no guarantee that a coding system will be permanently safe after it is once decided because of recent advances of decoding techniques.

When a plurality of receivers employ different coding systems, the size of a decoding program in the receivers increases; processes in the program become complicated; and the hardware configuration of the receiver also becomes complicated.

Images