Personal computer with broadcast receiver on expansion board controlled by computer microprocessor
First Claim
1. A personal computer provided with a broadcast receiver, said personal computer comprising:
- a main housing;
a microprocessor and a main memory in said housing;
a plurality of expansion slots in said housing, each said expansion slot having a first connector therein for receiving a mating connector on an expansion card;
an interface bus connecting said first connectors of said expansion slots and coupled to said microprocessor;
a visual display unit coupled to said housing;
a keyboard coupled to said housing; and
a broadcast receiver expansion card in a selected one of said expansion slots, said broadcast receiver expansion card comprising;
a tuner for receiving broadcast signals;
a data extraction circuit for extracting data from signals received by said tuner;
a second connector engaged with said first connector of said selected expansion slot;
an external signal receiving connection coupled to an input of said tuner; and
a control interface connected to said second connector and including control means connected to said tuner for controlling said tuner and connected to said data extraction circuit for controlling said data extraction circuit, such that said control means are directly controlled by said microprocessor of said personal computer.
2 Assignments
0 Petitions
Accused Products
Abstract
A broadcast receiver (22) for receiving television broadcast signals carrying encoded data e.g. teletext information, includes a tuner (30), a demodulator (32) and a data extractor (36) for decoding the data. The receiver is coupled to a computer through a bus (38) and an interface controller (40). The tuner (30), the demodulator (32) and the data extractor (36) are each individually controllable by the interface controller (40) in response to instructions from the computer to vary any of the tuning, the demodulation parameters, or the data extraction parameters. A data processor (54) processes the extracted data, and can also control the tuner (30), the demodulator (32) and the data extractor (36).
329 Citations
24 Claims
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1. A personal computer provided with a broadcast receiver, said personal computer comprising:
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a main housing; a microprocessor and a main memory in said housing; a plurality of expansion slots in said housing, each said expansion slot having a first connector therein for receiving a mating connector on an expansion card; an interface bus connecting said first connectors of said expansion slots and coupled to said microprocessor; a visual display unit coupled to said housing; a keyboard coupled to said housing; and a broadcast receiver expansion card in a selected one of said expansion slots, said broadcast receiver expansion card comprising; a tuner for receiving broadcast signals; a data extraction circuit for extracting data from signals received by said tuner; a second connector engaged with said first connector of said selected expansion slot; an external signal receiving connection coupled to an input of said tuner; and a control interface connected to said second connector and including control means connected to said tuner for controlling said tuner and connected to said data extraction circuit for controlling said data extraction circuit, such that said control means are directly controlled by said microprocessor of said personal computer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A personal computer provided with a broadcast receiver, said personal computer comprising:
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a microprocessor; and connector means coupled to said microprocessor; wherein said broadcast receiver is a unit removably installed in said personal computer and releasably coupled by said connector means to said microprocessor, said broadcast receiver including; a tuner for receiving broadcast signals; a demodulator coupled to said tuner for demodulating signals received by said tuner, said demodulator having controllable demodulation parameters; a data extraction circuit coupled to said demodulator for extracting data from signals received by said tuner; and a control interface releasably coupled by said connector means to said microprocessor and including control means, said control means being connected to said tuner, to said demodulator, and to said data extraction circuit for control thereof under the control of said microprocessor of said personal computer, including control of said demodulation parameters for said demodulator. - View Dependent Claims (8)
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9. A personal computer provided with a broadcast receiver, said personal computer comprising:
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a main housing; a microprocessor and a main memory in said housing, said main memory being coupled to said microprocessor; a plurality of expansion slots in said housing, each said expansion slot having a first connector therein for receiving a mating connector on an expansion card; an interface bus connecting said connectors of said expansion slots and coupled to said microprocessor; a visual display unit coupled to said housing and said microprocessor therein; a keyboard coupled to said housing and said microprocessor therein; and a broadcast receiver expansion card in a selected one of said expansion slots, said broadcast receiver expansion card comprising; a tuner for receiving broadcast signals; a second connector matingly engaging said first connector of said selected expansion slot; an external signal receiving connection coupled to an input of said tuner; and a control interface connected to said second connector and including control means connected to said tuner for controlling said tuner, said control means being directly controlled by said microprocessor of said personal computer.
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10. A personal computer provided with a broadcast receiver, said personal computer comprising:
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a main housing; a microprocessor and a main memory in said housing, said main memory being coupled to said microprocessor; an interface bus coupled to said microprocessor; a visual display unit coupled to said housing; a keyboard coupled to said housing; and a broadcast receiver in said housing, said broadcast receiver comprising; a tuner for receiving broadcast signals; a data extraction circuit for extracting data from signals received by said tuner; an external signal receiving connection coupled to an input of said tuner; and a control interface connected to said interface bus and including control means connected to said tuner for controlling said tuner and to said data extraction circuit for controlling said data extraction circuit, said control means being directly controlled by said microprocessor of said personal computer. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An expansion board adapted for removable insertion into an expansion slot of a personal computer, said expansion board comprising:
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a tuner for receiving broadcast signals; a connector; an external signal receiving connection coupled to an input of said tuner; and a control interface connected to said connector and including control means connected to said tuner for controlling said tuner, said control means being controlled by signals received through said connector. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification