Small-format subsystem for broadband communication services
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United States of America Patent
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Mar 21, 2000
Grant Date -
N/A
app pub date -
Jan 20, 1998
filing date -
Jan 20, 1998
priority date (Note) -
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Abstract
A method and apparatus are claimed that separate network-dependent from network-independent functions in set-top boxes (STBs), including digital consumer appliances and PCs. A receiver subsystem integrates network-dependent tuner, digital demodulation, Forward Error Correction (FEC), descrambling/decryption, and conditional access functions into a very small format (e.g., any of the PCMCIA Type I, II, or III form-factor). This combination of functions comprises a Digital Interface Conditional Access Module (DICAM). The DICAM interfaces with a Set-Top Universal Box (STUB) that includes network-independent functions. The STUB functionality may also be integrated with a consumer electronics (CE) appliance such as a TV, PC, DVD player, etc. The DICAM may also include an interface for 'Smartcards' that implement any of the many different varieties of CA functions currently found around the world.
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