Content transmitting apparatus, content receiving apparatus, content transmitting method, and content receiving method

A content transmitting and receiving method comprising:

• a content transmitting method, including:
• an IP packetizing step of packetizing content into an IP packet and adding an IP header to the content;
• a communication-network transmitting step of transmitting the IP packet through a communication network;
• an encapsulating step of encapsulating the IP packet into a transmission packet to be transmitted through a broadcast network for digital broadcast;
• and
• a broadcast-network transmitting step of transmitting the transmission packet,
• wherein a plurality of content items are transmitted by IP multicast at the communication-network transmitting step and the broadcast-network transmitting step, and information concerning a condition of a receiving side node for the content is added to the IP header at the IP packetizing step, said information including a current position of a user on the receiving side, a recipient attribute, or a recipient preference;
• and
• a content receiving method, including:
• a communication-network receiving step of receiving the IP packet from the communication network;
• a broadcast-network receiving step of receiving the transmission packet from the broadcast network;
• a decapsulation step of decapsulating the transmission packet received through the broadcast-network receiving step, and extracting the IP packet;
• an extracting step of extracting the information concerning the condition of the receiving side node for the content from the IP header of the IP packet;
• and
• a comparing step of comparing the information concerning the condition of the receiving side node for the content with a predetermined condition, outputs the content of the IP packet to the user when the information matches the predetermined condition, and discards the IP packet when the information does not match the predetermined condition.

A non-transient computer readable medium having a program that executes on one or more computers, causing the one or more computers to carry out a content transmitting method and a content receiving method,

• the content transmitting method including:
• an IP packetizing step of packetizing content into an IP packet and adding an IP header to the content;
• a communication-network transmitting step of transmitting the IP packet through a communication network;
• an encapsulating step of encapsulating the IP packet into a transmission packet to be transmitted through a broadcast network for digital broadcast;
• and
• a broadcast-network transmitting step of transmitting the transmission packet,
• wherein a plurality of content items are transmitted by IP multicast at the communication-network transmitting step and the broadcast-network transmitting step, and information concerning a condition of a receiving side node for the content is added to the IP header at the IP packetizing step, said information including a current position of a user on the receiving side, a recipient attribute, or a recipient preference;
• and
• the content receiving method including:
• a communication-network receiving step of receiving the IP packet from the communication network;
• a broadcast-network receiving step of receiving the transmission packet from the broadcast network;
• a decapsulation step of decapsulating the transmission packet received through the broadcast-network receiving step, and extracting the IP packet;
• an extracting step of extracting the information concerning the condition of the receiving side node for the content from the IP header of the IP packet;
• and
• a comparing step of comparing the information concerning the condition of the receiving side node for the content with a predetermined condition, outputs the content of the IP packet to the user when the information matches the predetermined condition, and discards the IP packet when the information does not match the predetermined condition.