Integrated set-top box
First Claim
Patent Images
1. An integrated set-top box, comprising:
- a common semiconductor substrate;
a down-stream path disposed on said common semiconductor substrate configured to down-convert a radio frequency (RF) signal, including;
a down-conversion circuit configured to produce a down-converted signal;
an analog-to-digital converter (ADC), coupled to an output of said down-conversion circuit, configured to digitize said down-converted signal;
a first demodulation circuit, coupled to an output of said ADC, configured to demodulate said digitized down-converted signal using a first demodulation method, wherein said first demodulation circuit includes a Motion Picture Expert Group (MPEG) decoder;
a second demodulation circuit, coupled to said output of said ADC, configured to demodulate said digitized down-converted signal using a second demodulation method, wherein said second demodulation circuit comprises;
an Audio/Video (A/V) processor configured to receive an input from said MPEG decoder,a video encoder coupled to a first output of said A/V processor, andan audio encoder coupled to a second output of said A/V processor; and
an upstream power amplifier disposed on said common semiconductor substrate.
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Abstract
The present invention is an integrated set-top box. In one embodiment, the up-stream path and the down-stream path are integrated on a common semiconductor substrate. The down-stream path can include a TV tuner and a digital receiver portion that is integrated on the common semiconductor substrate with a power amplifier of the up-stream path. In another embodiment, the TV tuner is implemented on a first semiconductor substrate and the digital receiver portion and the power amplifier are configured on a second semiconductor substrate. However, the two substrates are mounted on a common carrier so that the set-top box appears to be a single chip configuration to the user.
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Citations
19 Claims
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1. An integrated set-top box, comprising:
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a common semiconductor substrate; a down-stream path disposed on said common semiconductor substrate configured to down-convert a radio frequency (RF) signal, including; a down-conversion circuit configured to produce a down-converted signal; an analog-to-digital converter (ADC), coupled to an output of said down-conversion circuit, configured to digitize said down-converted signal; a first demodulation circuit, coupled to an output of said ADC, configured to demodulate said digitized down-converted signal using a first demodulation method, wherein said first demodulation circuit includes a Motion Picture Expert Group (MPEG) decoder; a second demodulation circuit, coupled to said output of said ADC, configured to demodulate said digitized down-converted signal using a second demodulation method, wherein said second demodulation circuit comprises; an Audio/Video (A/V) processor configured to receive an input from said MPEG decoder, a video encoder coupled to a first output of said A/V processor, and an audio encoder coupled to a second output of said A/V processor; and an upstream power amplifier disposed on said common semiconductor substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An integrated set-top box, comprising:
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a common semiconductor substrate; a down-stream path disposed on said common semiconductor substrate configured to down-convert a radio frequency (RF) signal, said down-stream path including; a tuner configured to down-convert said RF signal; and a down-conversion circuit configured to produce a down-converted signal; a first demodulation circuit configured to demodulate said down-converted signal using a first demodulation method, wherein said first demodulation circuit includes a Motion Picture Expert Group (MPEG) decoder configured to generate an MPEG output; a second demodulation circuit configured to demodulate said down-converted signal using a second demodulation method, wherein said second demodulation circuit comprises; an Audio/Video (A/V) processor configured to directly receive said MPEG output from said MPEG decoder, a video encoder directly coupled to a first output of said A/V processor, and an audio encoder directly coupled to a second output of said A/V processor; and an upstream power amplifier disposed on said common semiconductor substrate.
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19. An integrated set-top box, comprising:
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a common semiconductor substrate; a down-stream path disposed on said common semiconductor substrate configured to down-convert a radio frequency (RF) signal, said down-stream path including; a quadrature down-conversion circuit configured to produce a quadrature down-converted signal by mixing said RF signal with a quadrature local oscillator signal; and a first demodulation circuit configured to demodulate said quadrature down-converted signal using quadrature amplitude demodulation, wherein said first demodulation circuit includes a Motion Picture Expert Group (MPEG) decoder configured to generate an MPEG signal; a second demodulation circuit, configured to demodulate said quadrature down-converted signal using National Television System Committee (NTSC) demodulation, wherein said second demodulation circuit comprises; a comb filter; a de-emphasis module; an Audio/Video (A/V) processor coupled to an output of said first demodulation circuit, an output of said comb filter, and an output of said de-emphasis module, wherein said A/V processor is configured to receive said MPEG signal from said MPEG decoder, a video encoder coupled to a fist output of said A/V processor, and an audio encoder coupled to a second output of said A/V processor; and an upstream power amplifier disposed on said common semiconductor substrate.
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Specification