Digital signal processing apparatus

A digital signal receiver apparatus comprising:

• a digital signal bus input/output circuit which connects to a digital signal bus and transmits or receives a digital signal to or from external digital signal transmitter apparatuses connected to said digital signal bus;
• a controller which generates instructions to said external digital signal transmitter apparatuses and executes instructions from said external digital signal transmitter apparatuses;
• a decryptor which decrypts a signal from said external digital signal transmitter apparatuses;
• a packet processing circuit which converts an instruction from said controller to a transmission packet, and converts a received packet from said external digital signal transmitter apparatuses to an instruction to said controller, and converts a received packet from said external digital signal transmitter apparatuses to a digital signal to said decryptor;
• and
• a bus control circuit which transmits said transmission packet to said digital signal bus and receives said received packet from said digital signal bus via said digital signal bus input/output circuit;
• wherein said controller requests an authentication at a predetermined timing by generating an instruction for authentication request and performs the authentication to said external digital signal transmitter apparatuses and shares key information by exchanging said instructions with said transmission packets and received packets, and said decryptor decrypts said digital signal on the basis of said key information.

A digital signal processing method using a digital signal receiver apparatus which connects to external digital signal transmitter apparatuses through a digital signal bus, said method comprising the steps of:

• when said digital signal receiver apparatus is turned on, converting an instruction from a controller to a transmission packet and converting a received packet to an instruction to said controller in a packets processing circuit;
• transmitting said transmission packets from the packets processing circuit to said digital signal bus and receiving said received packets from said digital signal bus to said packets processing circuit via a digital signal bus input/output circuit by a bus control circuit;
• requesting authentication by said transmission packets from said digital signal receiver, to said external digital signal transmitter apparatuses connected to the digital signal receiver apparatus;
• and
• performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets and sharing key information for decrypting said digital signal on the basis of said key information.

A digital signal processing method using a digital signal receiver apparatus, said method comprising the steps of:

• when said digital signal receiver apparatus is connected to one of the external signal transmitter apparatuses,
• converting an instruction from a controller to a transmission packet and converting a received packet to an instruction to said controller in a packets processing circuit;
• transmitting said transmission packets from the packets processing circuit to said digital signal bus and receiving said received packets from said digital signal bus to said packets processing circuit via a digital signal bus input/output circuit by a bus control circuit;
• requesting authentication by said transmission packets from said digital signal receiver, to said external digital signal transmitter apparatuses connected to the digital signal receiver apparatus;
• and
• performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets and sharing key information for decrypting said digital signal on the basis of said key information.

A digital signal processing method using a digital signal receiver apparatus which has at least one input terminal including an input terminal from a digital signal bus and a switching circuit for selecting said input terminal, connected to external digital signal transmitter apparatuses through said digital signal bus, said method comprising the step of:

• when said input terminal connected to said digital signal bus is selected by said switching circuit,
• converting an instruction from a controller to a transmission packet and converting a received packet to an instruction to said controller in a packets processing circuit;
• transmitting said transmission packets from the packets processing circuit to said digital signal bus and receiving said packets from said digital signal bus to said packets processing circuit via a digital signal bus input/output circuit by a bus control circuit;
• requesting authentication by said transmission packets from said digital signal receiver, to said external digital signal transmitter apparatuses connected to the digital signal receiver apparatus;
• and
• performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets and sharing key information for decrypting said signal on the basis of said key information.

A digital signal processing method using a digital signal receiver apparatus which has a controller, comprising the steps of:

• when said controller searches for external digital signal transmitter apparatuses connected to said digital signal bus and then finds the external digital signal transmitter apparatuses,
• converting an instruction from a controller to transmission packets and converting received packets to an instruction to said controller in a packets processing circuit;
• transmitting said transmission packets from the packets processing circuit to said digital signal bus and receiving said received packets from said digital signal bus to said packets processing circuit via a digital signal bus input/output circuit by a bus control circuit;
• requesting authentication by said transmission packets from said digital signal receiver, to said external digital signal transmitter apparatuses connected to the digital signal receiver apparatus;
• and
• performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets and sharing key information for decrypting said digital signal on the basis of said key information.

A digital signal processing method using a digital signal receiver apparatus which has a controller, comprising the steps of:

• when said controller finds external digital signal transmitter apparatuses which are transmitting a digital video signal and/or a digital audio signal, converting an instruction from a controller, to transmission packets and converting received packets to an instruction to said controller in a packets processing circuit;
• transmitting said transmission packets from the packets processing circuit to said digital signal bus and receiving said received packets from said digital signal bus to said packets processing circuit via a digital signal bus input/output circuit by a bus control circuit;
• requesting authentication by said transmission packets from said digital signal receiver, to said external digital signal transmitter apparatuses connected to the digital signal receiver apparatus;
• and
• performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets and sharing key information for decrypting said digital signal on the basis of said key information.

A digital signal processing method using a digital signal receiver apparatus which has a controller, comprising the steps of:

• when said controller finds external digital signal transmitter apparatuses which are transmitting a digital video signal and/or a digital audio signal that cannot be copied freely,
• converting an instruction from a controller to transmission packets and converting received packets to an instruction to said controller in a packets processing circuit;
• transmitting said transmission packets from the packets processing circuit to said digital signal bus and receiving said received packets from said digital signal bus to said packets processing circuit via a digital signal bus input/output circuit by a bus control circuit;
• requesting authentication by said transmission packets from said digital signal receiver, to said external digital signal transmitter apparatuses connected to the digital signal receiver apparatus;
• and
• performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets and sharing key information for decrypting said digital signal on the basis of said key information.

A digital signal processing method using a digital signal receiver apparatus which has a controller, comprising the steps of:

• when said controller finds external digital signal transmitting apparatuses which were previously registered,
• converting an instruction from a controller to transmission packets and converting received packets to an instruction to said controller in a packets processing circuit;
• transmitting said transmission packets from the packets processing circuit to said digital signal bus and receiving said received packets from said digital signal bus to said packets processing circuit via a digital signal bus input/output circuit by a bus control circuit;
• requesting authentication by said transmission packets from said digital signal receiver, to said external digital signal transmitter apparatuses connected to the digital signal receiver apparatus;
• and
• performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets and sharing key information for decrypting said digital signal on the basis of said key information.

A digital signal processing method using a digital signal receiver apparatus which has a controller, comprising the steps of:

• when said controller finds external digital signal transmitter apparatuses which said digital signal receiver apparatuses received a digital video signal and/or a digital audio signal from in the past,
• converting an instruction from a controller to transmission packets and converting received packets to an instruction to said controller in a packets processing circuit;
• transmitting said transmission packets from the packets processing circuit to said digital signal bus and receiving said received packets from said digital signal bus to said packets processing circuit via a digital signal bus input/output circuit by a bus control circuit;
• requesting authentication by said transmission packets from said digital signal receiver, to said external digital signal transmitter apparatuses connected to the digital signal receiver apparatus;
• and
• performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets and sharing key information for decrypting said digital signal on the basis of said key information.