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US 7,117,534 B2Granted
Interfacing a conditional access circuit to a digital device using input and output stream switching
AssigneesSony Corporation, Sony Electronics Inc.
InventorBrant L. Candelore
Life of this patent
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Abstract
The present invention is a method and apparatus for interfacing a host and a conditional access circuit to a digital device. A switching circuit is coupled to the host and the conditional access circuit to switch input streams into output streams. The input streams include a host stream from the host and the output streams include an interface output stream. An interface circuit is coupled to the steering circuit and the digital device to transfer the interface output stream to the digital device.
Claims30
An apparatus comprising:
- a switching circuit coupled to a host and a conditional access circuit to select at least an output stream from a plurality of input streams, the input streams including a host stream from the host, the at least output stream including an interface output stream;
- and
- an interface circuit coupled to the switching circuit and a digital device to transfer the interface output stream to the digital device.
A method comprising:
- selecting at least an output stream from a plurality of input streams by a switching circuit coupled to a host and a conditional access circuit, the input streams including a host stream from the host, the at least output stream including an interface output stream;
- and
- transferring the interface output stream to the digital device by an interface circuit.
A system comprising:
- a host to provide a content;
- a conditional access device coupled to the host to provide conditional access to the content, the condition access device having a conditional access circuit;
- a digital device coupled to the conditional access device to access the content;
- and
- a circuit coupled to the host and the digital device to provide interface between the conditional access device and the digital device, the comprising:
- a switching circuit coupled to the host and the conditional access circuit to select at least an output stream from a plurality of input streams, the input streams including a host stream from the host, the at least output stream including an interface output stream, and
- an interface circuit coupled to the switching circuit and the digital device to transfer the interface output stream to the digital device.
4 more elements
Dependencies are inferred from the claim text.