Digital signal processing apparatus

• US 6,839,851 B1
• Filed: 07/28/1999
• Issued: 01/04/2005
• Est. Priority Date: 07/28/1998
• Status: Expired due to Term

• Current Assignee: Maxell, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Okamoto, Hiroo, Saitoh, Seiichi, Sasamoto, Manabu
• Primary Examiner(s): HUA, LY
• Application Number:
  US09/362,041
• Time in Patent Office: 1,987 Days
• Field of Search: 713/182, 713/201, 713/200, 713/168, 380/201, 380/202, 380/270
• US Class Current: 726/13
• CPC Class Codes: H04N 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 21/25816 involving client authentication restricting access to computer systems by authenticating users using a predetermined code G06F21/33; cryptographic authentication protocols H04L9/32; networks authentication protocols H04L63/08; authentication in wireless network security H04W12/06
• CPC Class Codes: H04N 21/4147 PVR [Personal Video Recorder] H04N5/76 takes precedence ; arrangements for broadcast with accumulation-type receivers H04H20/40
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• CPC Class Codes: H04N 21/4367 Establishing a secure communication between the client and a peripheral device or smart card
• CPC Class Codes: H04N 21/4408 involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
• CPC Class Codes: H04N 21/44227 Monitoring of local network, e.g. connection or bandwidth variations; Detecting new devices in the local network configuring of peripheral devices in general G06F9/4411; monitoring connectivity in data switched networks H04L43/0811
• CPC Class Codes: H04N 21/4627 Rights management associated to the content security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/8355 involving usage data, e.g. number of copies or viewings allowed
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection
• CPC Class Codes: H04N 7/162 Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: Y10S 707/99943 Generating database or data structure, e.g. via user interface

Abstract

If content is transmitted/received through a digital signal bus, protection of copyright causes a problem because of no deterioration in quality. Accordingly, authentication is required. The quantity of information to be processed is, however, so large that a long time is required for authentication. Accordingly, both achievement of handling property as in conventional analog connection and protection of copyrighted content without user'"'"'s awareness become an object. The foregoing object can be achieved by authentication which is executed, for management of copyright, among apparatuses connected to the digital signal bus when the apparatuses are powered on or connected to the digital signal bus or when an input terminal connected to the digital signal bus is selected. The object can be further achieved by an encryption key shared among these apparatuses.

Claims

1. 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 an instruction to said external digital signal transmitter apparatuses and executes an instruction from said external digital signal transmitter apparatuses;

packets processing circuit which converts said instruction from said controller, to transmission packets, and converts received packets from said external digital signal transmitter apparatuses to an instruction to said controller; and

a bus control circuit which transmits said transmission packets to said digital signal bus and receives said received packets 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 by exchanging said instruction with said transmission packets and received packets.

2. A digital signal receiver apparatus according to claim 1,

wherein said controller requests authentication when said digital signal receiver apparatus is turned on, and then performs the authentication to said external digital signal transmitter apparatuses.

3. A digital signal receiver apparatus according to claim 1,

wherein said controller requests authentication when said external digital signal transmitter apparatuses are turned on, and then performs the authentication to said external digital signal transmitter apparatuses.

4. A digital signal receiver apparatus according to claim 1,

wherein said controller requests authentication when said digital signal receiver apparatus is connected to said digital signal bus, and then performs the authentication to said external digital signal transmitter apparatuses.

5. A digital signal receiver apparatus according to claim 1,

wherein said controller requests authentication when said external digital signal transmitter apparatuses are connected to said digital signal bus, and then performs the authentication to said external digital signal transmitter apparatuses.

6. A digital signal receiver apparatus according to claim 1, further comprising:

at least one input terminal including an input terminal from said digital signal bus; and

a switching circuit for selecting said input terminal,

wherein said controller requests authentication when said input terminal connected to said digital signal bus is selected by said switching circuit, and then performs the authentication to said external digital signal transmitter apparatuses.

7. A digital signal receiver apparatus according to claim 1,

wherein said controller searches external digital signal transmitter apparatuses connected to said digital signal bus, requests authentication when said controller finds external digital signal transmitter apparatuses, and then performs the authentication to found external digital signal transmitter apparatuses.

8. A digital signal receiver apparatus according to claim 1,

wherein said controller requests authentication when said controller finds external digital signal transmitter apparatuses which are transmitting a digital video signal and/or a digital audio signal, and then performs the authentication to said external digital signal transmitter apparatuses.

9. A digital signal receiver apparatus according to claim 1, wherein said controller requests authentication 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, and then performs the authentication to said external digital signal transmitter apparatuses.

10. A digital signal receiver apparatus according to claim 1,

wherein said controller requests authentication when said controller finds external digital signal transmitter apparatuses which were previously registered, and then performs the authentication to said external digital signal transmitter apparatuses.

11. A digital signal receiver apparatus according to claim 1,

wherein said controller requests authentication when said controller finds external digital signal transmitter apparatuses which said digital signal receiver apparatus received a digital video signal and/or a digital audio signal from in the past, and then performs the authentication to said external digital signal transmitter apparatuses.

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

when said digital signal receiver apparatus is turned on,

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.

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

when said digital signal receiver apparatus is connected to one of external 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.

14. A digital signal processing method using a digital signal receiver apparatus which has at least one input terminal including an input terminal from said digital signal bus and a switching circuit for selecting said input terminal, comprising the steps of:

when said input terminal connected to said digital signal bus is selected by said switching circuit,

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 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.

15. 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; and

performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets.

16. 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 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 the digital signal receiver; and

performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets.

17. 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; and

performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets.

18. 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 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; and

performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets.

19. 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 apparatus 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 the 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; and

performing the authentication to said external signal transmitter apparatuses by said transmission packets and received packets.