Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8023590 | NICAM audio signal resampler A NICAM audio signal re-sampler may include a non-linear interpolator configured to interpolate in a non-linear manner between sequential digital samples that are based on a stream of demodulated NICAM audio samples. A phase differential calculator may be included t... | 09/20/2011 |
| 8014741 | Signal quality estimation and control system A signal quality estimation and control system for controlling a signal having noise. The system may include a signal strength determination system having an input configured to receive the signal and an output configured to output information indicative of the stre... | 09/06/2011 |
| 7940842 | Reciprocal index lookup for BTSC compatible coefficients An algorithm calculates spectral compression/expansion filter coefficients using a value proportional to a reciprocal of a feedback/feedforward signal and stores the coefficients to a lookup table. The lookup table is indexed by a pre selected set of coefficient bit... | 05/10/2011 |
| 7929054 | Up-sampling television audio signals for encoding A television audio signal encoder includes an up-sampler that inserts additional samples into a sum signal, a difference signal, and/or a secondary audio program signal to increase the sample rate of the corresponding signal or signals. The sum signal represents the... | 04/19/2011 |
| 7830452 | Direct digital encoding and radio frequency modulation for broadcast television applications A digital audio encoder, digital video conditioner, and a digital modulator are described for producing a television broadcast signal at a desired channel frequency range. Left and right audio channel signals are digitized and encoded according to a stereo standard ... | 11/09/2010 |
| 7826621 | Configurable filter for processing television audio signals A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The e... | 11/02/2010 |
| 7822210 | Configurable recursive digital filter for processing television audio signals A television audio signal encoder includes a device that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The device also subtracts one of the left and right audio signals from the other to produce a difference signal. The e... | 10/26/2010 |
| 7719616 | Direct digital encoding and radio frequency modulation for broadcast television application A digital audio encoder, digital video conditioner, and a digital modulator are described for producing a television broadcast signal at a desired channel frequency range. Left and right audio channel signals are digitized and encoded according to a stereo standard ... | 05/18/2010 |
| 7639307 | Up-sampling television audio signals for encoding A television audio signal encoder includes an up-sampler that inserts additional samples into a sum signal, a difference signal, and/or a secondary audio program signal to increase the sample rate of the corresponding signal or signals. The sum signal represents the... | 12/29/2009 |
| 7539316 | Configurable filter for processing television audio signals A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The e... | 05/26/2009 |
| 7411438 | Low-power integrated-circuit signal processor with wide dynamic range An integrated circuit includes at least three separate power supply terminals, at least one for those portions of the circuit that must accommodate the widest signal-related voltage excursion, at least one for those that experience substantially smaller signal-relat... | 08/12/2008 |
| 6316970 | Floating, balanced output circuit A floating, balanced output stage maintains control of the common-mode output current in both output legs even when the differential voltage output is clipped. The circuit includes a pair of transconductance amplifier sections one for providing a differen... | 11/13/2001 |
| 6160451 | Operational amplifier output stage The present invention is directed to a buffer stage for buffering and isolating a signal source from an external load. The stage has a signal input terminal for receiving an input signal from said signal source and a signal output terminal for providing a... | 12/12/2000 |
| 6118879 | BTSC encoder The disclosed BTSC encoder includes a left high pass filter means for receiving a digital left channel audio signal and for digitally high pass filtering the digital left channel audio signal and thereby generating a digital left filtered signal; a right ... | 09/12/2000 |
