Abstract: An agile RF tuner circuit capable of converting a wide portion of RF signal into an IF signal suitable for analog-to-digital conversion. The circuit up converts a received RF signal to a high IF signal and then down converts the high IF signal to a low IF signal. Embodiments of the RF circuit incorporate harmonic reject mixers to suppress harmonics and intermodulations typically associated with the frequency conversion process.

Abstract: When dynamically varying a number of active paths in a system, a desired return loss is maintained. Certain embodiments enable dynamic varying of the impedance of parallel signal paths in a system responsive to the number of active ones of the parallel paths dynamically changing, in order to maintain a relatively constant impedance match between a source and the combination of parallel paths, thereby retaining a desired return loss.

Abstract: A multipath component in a GPS signal received is detected when an asymmetry exists in the correlation function of the received signal and the expected GPS signal. The multi-path component is also detected, even without a line-of-sight component in the received GPS signal, when a peak of the correlation function jumps a significant distance (i.e., a sudden, significant change in a detected code phase).

Abstract: Systems and methods which provide a multimode tuner architecture implementing direct frequency conversion are shown. Embodiments provide a highly integrated configuration wherein low noise amplifier, tuner, analog and digital channel filter, and analog demodulator functionality are provided in a single integrated circuit. A LNA of embodiments implements a multi-path configuration with seamless switching to provide desired gain control while meeting noise and linearity design parameters. Embodiments of the invention implement in-phase and quadrature (IQ) equalization and a multimode channelization filter architecture to facilitate the use of direct frequency conversion. Embodiments implement spur avoidance techniques for improving tuner system operation and output using a clock signal generation architecture in which a system clock, sampling clock frequencies, local oscillator (LO) reference clock frequencies, and/or the like are dynamically movable.

Abstract: Systems and methods which provide DC current path circuitry, such as for providing a DC bias, in association with a filter circuit such that parasitic attributes of the DC current path circuitry combines with the filter component attributes are shown. According to embodiments, the parasitic attributes of the DC current path circuitry components are added into the associated filter circuit network design. A parasitic capacitance of the DC current path circuitry may, for example, be aggregated with a capacitor of the filter circuit to eliminate or mitigate the effect of the presence of the DC current path circuitry on the associated filter frequency response. Embodiments implement an active inductor configuration for providing a DC current path in association with a filter circuit. An active inductor of embodiments is provided using a transistor, appropriately biased to actively exhibit low impedance at DC and high impedance at RF frequencies.

Abstract: A television display system including a display system controller, a transmitter, and an integrated timing controller. The display system controller receives pixel data and pixel timing and control data, and responsive to a pixel data format corresponding to a selected communication standard of a plurality of communication standards that includes LVDS and at least one of RSDS and mini-LVDS, provides formatted pixel data formatted according to the pixel data format of the selected communication standard. The transmitter receives the formatted pixel data, and transmits the formatted pixel data for receipt according to a pixel data rate corresponding to the selected communication standard.

Abstract: A method of processing a digital image includes applying a discrete cosine transform (DCT) to a plurality of shifted digital images to produce a plurality of DCT coefficients, amplifying at least some of the DCT coefficients by a variable gain, applying an inverse DCT to the amplified DCT coefficients, and averaging the results to produce a visually sharper image. The variable gain may be a function of the amplitude of the DCT coefficients.

Abstract: An electronic system includes a signal processor, a control signal generator, and an I/O interface. The signal processor has a first output signal and the first output signal is characterized by at least a first property and a second property. The control signal generator is configured to produce first and second control signals in accordance with the first and second properties of the first output signal, respectively. The I/O interface is configured to couple at least the first and second control signals to an output device. In some embodiments, the first output signal is a pulse width modulated signal having a software-specified pulse width and a software-specified repeat frequency. In some embodiments, the first property of the first output signal is the signal's duty cycle and the second property is the signal's frequency.

Abstract: The likelihood of a particular type of object, such as a human face, being present within a digital image, and its location in that image, are determined by comparing the image data within defined windows across the image in sequence with two or more sets of data representing features of the particular type of object. The evaluation of each set of features after the first is preferably performed only on data of those windows that pass the evaluation with respect to the first set of features, thereby quickly narrowing potential target windows that contain at least some portion of the object. Correlation scores are preferably calculated by the use of non-linear interpolation techniques in order to obtain a more refined score. Evaluation of the individual windows also preferably includes maintaining separate feature set data for various positions of the object around one axis and rotating the feature set data with respect to the image data for the individual windows about another axis.

Abstract: There are situations where GPS signals are received from less than four satellites. In order to improve the GPS location availability, disclosed here are systems and methods for synthesizing GPS measurements, which, together with fewer than four available real GPS signals, can be used to calculate a position fix. In particular, GPS range measurements for lost satellites, which are satellites that were previously tracked but are now not tracked, are synthesized to improve GPS signal availability. The synthesized measurements are used along with real measurements to enable accurate position fix even when GPS satellite availability is poor. Different synthesized measurement generation schemes, depending on whether an INS/DR aiding system is available, are further described herein.

Abstract: A device for color shading correction is provided. Local color matching is performed as follows. For each pixel of the image that is being color matched, the RGB value is treated as a one-by-three matrix, which is multiplied by a three-by-three matrix that is generated during factory calibration. The matrix product is a one-by-three matrix that is used as the RGB value for the pixel in the color matched image.

Abstract: Embodiments are directed towards compressing an image to substantially a preset file size using statistical information obtained from a single subset of the image and an initial compression of the single subset. A representative subset portion of the image is selected based in part on a clustering analysis of the image. The representative subset is then compressed, in one embodiment, twice, in order to obtain statistics useable for the entire image. A scale factor is then determined that may be used in the quantization and for creating a Bit Rate Control (BRC) curve that represents an amount of accumulated bits per Minimal Codec Unit (MCU). During the compression process, the BRC curve is used to prevent accumulating bits from over shooting a final preset file size target.

Abstract: A GPS receiver for tracking a GPS signal. The receiver generates a mixed GPS signal by mixing the GPS signal with an oscillator signal, generates a first correlation signal by correlating the mixed GPS signal with a reference signal, and generates a filtered GPS signal from the GPS signal. The receiver also generates a filtered reference signal from the reference signal, generates a second correlation signal by correlating the filtered GPS signal with the filtered reference signal, and a generates a combined correlation signal by combining the first correlation signal with the second correlation signal. The receiver tracks the GPS signal by adjusting the phase of the oscillator signal based on the combined correlation signal.

Abstract: Systems and methods are described for determining location of wireless devices using signal strength of signals detected by the wireless devices. The strength of signals received from identifiable sources is typically compared to reference signal strength measurements collected or estimated at known locations. Information identifying the source of the signals is typically obtained from data provided in the signals. Mappers associate combinations of reference signal strengths with geometrically shaped geographical regions such that signal strength measurements can be used as indices to locate a region in which a wireless device can be found. Systems and methods are described for receiving signal strength information from known locations where the information can be used to update and improve mapping system databases.

Abstract: A method and apparatus for deinterleaving in a communication system is disclosed. The method and apparatus deinterleave data units using a data deinterleaver; compressed deinterleave input symbol quality information (SQI) units using a compressed deinterleaver, wherein at least one of the input SQI units deinterleaved by the compressed deinterleaver corresponds to at least one of the plurality of data units deinterleaved by the data deinterleaver; and apply the deinterleaved SQI units to the corresponding deinterleaved data units.

Abstract: A system and method for automatically removing polarized light in an environment having polarized light and unpolarized light. Light is processed by a polarizer and measured by a sensor. Multiple measurements of a light characteristic are taken, each measurement corresponding to a polarity setting of the polarizer. The polarizer is automatically adjusted to enable the multiple measurements. The measurements may be of average light intensity, contrast, saturation, or another characteristic. Based on the multiple measurements and the corresponding polarity settings, an optimal polarity setting is determined, such that the amount of polarized light is minimized. A curve fitting calculation may be used to make the determination. The polarizer is adjusted to the determined polarity setting.

Abstract: According to aspects of embodiments, a method of determining an aperture window in a video deinterlacer includes: computing a first mean absolute difference (MAD) value for a pixel based on a 1×5 window; computing a second MAD value for the pixel using a 3×5 window; and selectively blending the first and second MAD values to form a resultant motion value.

Abstract: A method of determining when to activate a screen saver for a display device comprises selecting as a sample set a sparse subset of pixels which collectively form a display frame. An evaluation is performed of only the pixels in the sample set, to determine over a plurality of display frames whether pixels within the sample set have undergone a sufficient amount of change so that burn-in is unlikely. A determination is then made of whether to activate the screen saver based on a result of the evaluation.

Abstract: A recursive motion detector, comprises: a first frame motion detector receiving a next field and a first previous field; a second frame motion detector receiving a current field and a second previous field; and a third frame motion detector receiving a next field and a third previous field; wherein motion is detected when the first, second and third frame motion detectors combine to produce a frame motion result.

Abstract: Systems and methods which provide a multimode tuner architecture implementing direct frequency conversion are shown. Embodiments provide a highly integrated configuration wherein low noise amplifier, tuner, analog and digital channel filter, and analog demodulator functionality are provided in a single integrated circuit. A LNA of embodiments implements a multi-path configuration with seamless switching to provide desired gain control while meeting noise and linearity design parameters. Embodiments of the invention implement in-phase and quadrature (IQ) equalization and a multimode channelization filter architecture to facilitate the use of direct frequency conversion. Embodiments implement spur avoidance techniques for improving tuner system operation and output using a clock signal generation architecture in which a system clock, sampling clock frequencies, local oscillator (LO) reference clock frequencies, and/or the like are dynamically movable.