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| Turret type punch press having a plurality of strikers |
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| Switched capacitor sine wave generator and keyer |
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| Automatic hand firearm |
| I claim: 1. An automatic hand firearm comprising a body including a handle, a barrel connected to ... |
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| Circuit for performing white balance correction using two color temperature sensors |
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| White balance correcting device for an image sensing |
| With such situations in mind, the present invention has been made and its object is to provide a ... |
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Small-format subsystem for broadband communication services
| Details |
Inventors: Cheng, Vernon; Mauro, Greg;
Assignee: Conexant Systems, Inc. (Newport Beach, CA)
Primary Examiner: Kostak; Victor R.
Assistant Examiner:
Attorney, Agent or Firm:
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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DETAILED DESCRIPTION FIG.
1 is block diagram showing a preferred division of typical network-dependent functions 10 and network-independent functions 12 in accordance with the invention.
Common network-independent functions 12 that typically would be implemented in a Set-Top Universal Box (STUB) include: An audiovideo processing unit 14 that typically would include a central processing unit (CPU) 16, a transport demultiplexer 18 for separating data and commands from an incoming transport data stream, an audiovideo decoder 20 (such as a conventional MPEG2 and Dolby.
TM.
decoder) for generating respective audio and video outputs from the incoming data and commands, and a graphics module 22 for rendering digital video graphics data for display for output to a computer monitor.
A video encoder 24 for generating a television-compatible output signal, and preferably compatible with the NTSC, PAL, or SECAM broadcast video standards.
Other modules may be provided as desired.
For example, memory is provided as necessary, and various input/output ports may be provided, such as an infrared remote control interface, IEEE 1394 ("FireWire") interface, etc.
Network-dependent functions 10 that typically would be implemented in a Digital Interface Conditional Access Module (DICAM) include: A tuner 30 for receiving an analog or digitally-modulated radio frequency (RF) signal from a selected source (e.
g.
, an audiovideo signal from a source such as an xDSL line, cable modem, HFC digital cable, DBS system, MMDS system, LMDS, etc.
) and for selecting a portion of the RF audiovisual signal.
The tuner 30 generally would be configured differently for each type of source, to accommodate different signaling protocols, broadband frequencies, etc.
An analog demodulation module 32 for converting the signal selected from the RF audiovisual signal to an analog baseband signal.
An analog-to-digital module 34 for converting a received analog baseband signal to digital, and/or demodulating a received digital signal, and for performing conventional forward error correction on the digital signal
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