Bidirectional HDCP transmission module using single optical fiber
First Claim
1. A bidirectional HDCP transmission system using a single optical fiber having a core and cladding, the system comprising:
- a forward channel for delivering protected digital video and audio content, wherein the forward channel is substantially communicated in the core of the single optical fiber; and
a backward channel for establishing an HDCP-enabled transmission, wherein the backward channel is at a lower data rate relative to the forward channel and is substantially communicated in the cladding of the single optical fiber.
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Abstract
Techniques that provide cost effective optical fiber communication links for HDCP transmission systems and the like are provided. A single fiber for bidirectional communication is enabled, without wavelength selective unit to achieve the HDCP transmission. One embodiment of the present invention has a forward channel using a light source (e.g., VCSEL at about 850 nm) in the GHz modulation level (e.g., 1 GHz or greater), and a corresponding photodetector. The backward channel has a light source (e.g., LED at 630 nm) in the MHz modulation level (e.g., 10 MHz or less), and a corresponding photodetector. One application is for realizing a home entertainment system (e.g., DVD player and high definition television) that employs an HDCP-enabled communication link to transmit copy restricted digital content.
73 Citations
25 Claims
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1. A bidirectional HDCP transmission system using a single optical fiber having a core and cladding, the system comprising:
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a forward channel for delivering protected digital video and audio content, wherein the forward channel is substantially communicated in the core of the single optical fiber; and
a backward channel for establishing an HDCP-enabled transmission, wherein the backward channel is at a lower data rate relative to the forward channel and is substantially communicated in the cladding of the single optical fiber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A bidirectional protected digital content transmission system using a single optical fiber having a core and cladding, the system comprising:
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a forward channel for delivering protected digital content, wherein the forward channel is substantially communicated in the core of the single optical fiber; and
a backward channel for establishing a transmission of the protected digital content subject to one or more protection mechanisms, wherein the backward channel is at a lower data rate relative to the forward channel and is substantially communicated in the cladding of the single optical fiber. - View Dependent Claims (14, 15, 16, 17)
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18. A device for bidirectional protected digital content transmission using a single optical fiber having a core and cladding, the device comprising:
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a forward channel circuit for one of transmitting or receiving protected digital content in the GHz range, wherein the content is substantially communicated in the core of the single optical fiber; and
a backward channel circuit for one of transmitting or receiving protection scheme data in the MHz range, wherein the data is substantially communicated in the cladding of the single optical fiber. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification