Abstract: The present disclosure generally relates to systems and methods for imaging and sensing vibrations of an object. In one implementation, a system is provided for detecting vibrations that comprises a sensor with a plurality of pixels, each pixel including at least one photosensitive element. The sensor is configured to output signals related to illumination on each pixel. The system also includes at least one processor configured to receive the output signals from the sensor and detect, based on the output signals, one or more polarities. The at least one processor is also configured to determine timestamps associated with the output signals, analyze the timestamps and the polarities to detect vibrations of an object in the field of view of the sensor, and determine one or more frequencies of the detected vibrations.

Abstract: The present disclosure generally relates to systems and methods for imaging and sensing vibrations of an object. In one implementation, a system is provided for detecting vibrations that comprises a sensor with a plurality of pixels, each pixel including at least one photosensitive element. The sensor is configured to output signals related to illumination on each pixel. The system also includes at least one processor configured to receive the output signals from the sensor and detect, based on the output signals, one or more polarities. The at least one processor is also configured to determine timestamps associated with the output signals, analyze the timestamps and the polarities to detect vibrations of an object in the field of view of the sensor, and determine one or more frequencies of the detected vibrations.

Abstract: Techniques are provided for motion estimation using hybrid video imaging based on frame-based capture and event-based capture. A methodology implementing the techniques according to an embodiment includes receiving a sequence of pixel events, generated asynchronously by an event-based video camera, and receiving a sequence of image frames generated by a frame-based video camera at a frame sampling period. The method also includes integrating a subset of the sequence of pixel events, occurring within the frame sampling period between two of the image frames, to generate a pixel motion vector representing motion of the pixel between the two image frames. The method further includes mapping the pixel motion vector to a tile of one of the image frames to generate an estimated motion vector associated with that tile.

Abstract: Techniques are provided for motion estimation using hybrid video imaging based on frame-based capture and event-based capture. A methodology implementing the techniques according to an embodiment includes receiving a sequence of pixel events, generated asynchronously by an event-based video camera, and receiving a sequence of image frames generated by a frame-based video camera at a frame sampling period. The method also includes integrating a subset of the sequence of pixel events, occurring within the frame sampling period between two of the image frames, to generate a pixel motion vector representing motion of the pixel between the two image frames. The method further includes mapping the pixel motion vector to a tile of one of the image frames to generate an estimated motion vector associated with that tile.

Abstract: A backward compatible enhancement to ATSC-VSB transmissions is provided to enable intra-field channel estimation for better channel equalization. One or more time-frequency waveforms are inserted into the transmitted signal with systematic time and frequency variation synchronized to the currently available field sync. A coherent demodulator may then directly estimate the channel frequency response. The power of the inserted waveform(s) is small compared to the existing 8-VSB signal, such that existing receivers will function as intended with only minimal degradation of performance.

Abstract: An apparatus and method of a shared correlator system for a code division, multiple access (CDMA) receiver employs scheduling of correlation operations with identification tags (ID-tags). The scheduling allows for shared vector generation and correlation operations between processing units by pipeline processing. The shared correlator schedules correlation operations requested by processing units, generates matched-filter PN vectors associated with the identification tags for the correlation operations, and provides correlation results for the correlation operations. Scheduling may be implemented with a control processor, scheduler and memory. The control processor determines the matched-filter PN vector information for a requested operation using the current state of a reference PN code sequence, and this information is stored as the ID-tag. The control processor stores the ID-tag at an address in memory associated with a slot of a periodic symbol schedule.

Abstract: A backward compatible enhancement to ATSC-VSB transmissions is provided to enable intra-field channel estimation for better channel equalization. One or more time-frequency waveforms are inserted into the transmitted signal with systematic time and frequency variation synchronized to the currently available field sync. A coherent demodulator may then directly estimate the channel frequency response. The power of the inserted waveform(s) is small compared to the existing 8-VSB signal, such that existing receivers will function as intended with only minimal degradation of performance.

Abstract: A system and method for implementing a universal Reed-Solomon (R-S) encoder and decoder that can process variable sized data blocks and variable sized Galois fields in a same hardware device. The Galois field operators for multiplication, scale, inversion, and addition are each implemented as symbol-width bit-logic arrays that correspond to a maximum symbol width, and for symbols having smaller widths, the extraneous bits are unused. The present invention allows for selection of a multitude of operational data word widths based on a computer-controlled selection port on the hardware device.

Abstract: A shared correlator system and method for a code division, multiple access (CDMA) receiver employs pipeline processing and information tags for sharing vector generation and correlation operations between processing units. A signal input to the CDMA receiver is provided as, for example, In-phase channel (I) and quadrature-phase channel (Q) sample vectors IREC and QREC. Sample vectors IREC and QREC are applied to the shared correlator of the CDMA receiver. Processing units request correlation operations by the shared correlator in which matched filter pseudo-noise (PN) vectors are correlated with the I and Q sample vectors IREC and QREC. The shared correlator schedules correlation operations requested by processing units, generates matched-filter, PN vectors with associated identification tags for the correlation operations, and provides correlation results for the correlation operations.

Abstract: A vector generator generates one or more pseudo-random noise PN sequences as matched-filter PN vectors for a matched-filter correlator of a code division, multiple-access (CDMA) demodulator. The period and clock of the local PN code sequence may be employed as a time reference, and each matched-filter PN vector has a known code-phase offset with respect to the local PN code sequence. Matched-filter PN vectors having a chip-length on the order of a data symbol period, such as 64-chip sequences, are generated within a short period of time compared to the period of the local PN code sequence. A state of the local PN code sequence is periodically captured from the local PN code sequence, which state is employed by a PN generator generating a similar PN code sequence but clocked at a higher rate. Consequently, a series of offset PN code sequences are generated in advance of the local PN code sequence.