Patent application number | Description | Published |
20120224686 | STOCHASTIC VECTOR BASED NETWORK ECHO CANCELLATION - An apparatus generally having a first circuit and a second circuit is disclosed. The first circuit may be configured to generate a first sample by filtering an input vector based on (a) a filter vector and (b) a stochastic vector. Each of a plurality of components in the stochastic vector generally has a respective random value. The first circuit may also be configured to generate a second sample as a difference between a third sample and the first sample. The third sample may be received from a network as an echo. The second circuit may be configured to update a subset of a plurality of taps of the filtering where a corresponding one of the components of the stochastic vector has a first value of the random values. | 09-06-2012 |
20120271871 | DOUBLE PRECISION APPROXIMATION OF A SINGLE PRECISION OPERATION - A method for double precision approximation of a single precision operation is disclosed. The method may include steps (A) to (B). Step (A) may store an input value in a processor. The processor generally implements a plurality of first operations in hardware. Each first operation may receive a first variable as an argument. The first variable may be implemented in a fixed point format at a single precision. The input value may be implemented in the fixed point format at a double precision. Step (B) may generate an output value by emulating a selected one of the first operations using the input value as the argument. The emulation may utilize the selected first operation in hardware. The output value may be implemented in the fixed point format at the double precision. The emulation is generally performed by a plurality of instructions executed by the processor. | 10-25-2012 |
20120288084 | FAST ECHO GAIN CHANGE DETECTION - An apparatus generally having a first circuit and a second circuit is disclosed. The first circuit may be configured to synthesize a first vector by filtering a second vector based on a third vector. The second circuit may be configured to (i) generate a gain corresponding to a fourth vector, (ii) compare the gain to a plurality of thresholds and (iii) update the third vector as a function of the gain where the compare determines that the gain is not between the thresholds. The fourth vector may be received from a network as an echo of the second vector. | 11-15-2012 |
20140019825 | ACCELERATING ERROR-CORRECTION DECODER SIMULATIONS WITH THE ADDITION OF ARBITRARY NOISE - In one embodiment, a simulator, e.g., for a hard-disk drive selects for testing a signal-to-noise ratio (SNR) value from a range of ratios and an error-correction codeword pattern from a range of codeword patterns. The simulator simulates a communications channel by applying write noise, inter-symbol interference, and read noise to the codeword pattern to generate a noisy signal. In addition, the simulator adds arbitrary-noise to the codeword to accelerate the speed of the simulation. The arbitrary noise increases the probability of converging on a trapping set and does not represent any noise introduced by the communications channel. The simulator attempts to decode the noisy signal, and if decoding is unsuccessful, then the simulator increments an error counter corresponding to the selected signal-to-noise ratio. This process is repeated for all possible combinations of signal-to-noise ratio values and codeword patterns to determine the error rate for all of the signal-to-noise ratio values. | 01-16-2014 |
20140240467 | IMAGE PROCESSING METHOD AND APPARATUS FOR ELIMINATION OF DEPTH ARTIFACTS - An image processing system comprises an image processor configured to identify one or more potentially defective pixels associated with at least one depth artifact in a first image, and to apply a super resolution technique utilizing a second image to reconstruct depth information of the one or more potentially defective pixels. Application of the super resolution technique produces a third image having the reconstructed depth information. The first image may comprise a depth image and the third image may comprise a depth image corresponding generally to the first image but with the depth artifact substantially eliminated. An additional super resolution technique may be applied utilizing a fourth image. Application of the additional super resolution technique produces a fifth image having increased spatial resolution relative to the third image. | 08-28-2014 |
20140362289 | METHOD AND APPARATUS FOR INCREASING FRAME RATE OF AN IMAGE STREAM USING AT LEAST ONE HIGHER FRAME RATE IMAGE STREAM - An image processing system comprises an image processor configured to obtain a first image stream having a first frame rate and a second image stream having a second frame rate lower than the first frame rate, to recover additional frames for the second image stream based on existing frames of the first and second image streams, and to utilize the additional frames to provide an increased frame rate for the second image stream. Recovering additional frames for the second image stream based on existing frames of the first and second image streams illustratively comprises determining sets of one or more additional frames for insertion between respective pairs of consecutive existing frames in the second image stream in respective iterations. | 12-11-2014 |
20150023607 | GESTURE RECOGNITION METHOD AND APPARATUS BASED ON ANALYSIS OF MULTIPLE CANDIDATE BOUNDARIES - An image processing system comprises an image processor configured to identify a plurality of candidate boundaries in an image, to obtain corresponding modified images for respective ones of the candidate boundaries, to apply a mapping function to each of the modified images to generate a corresponding vector, to determine sets of estimates for respective ones of the vectors relative to designated class parameters, and to select a particular one of the candidate boundaries based on the sets of estimates. The designated class parameters may include sets of class parameters for respective ones of a plurality of classes each corresponding to a different gesture to be recognized. The candidate boundaries may comprise candidate palm boundaries associated with a hand in the image. The image processor may be further configured to select a particular one of the plurality of classes to recognize the corresponding gesture based on the sets of estimates. | 01-22-2015 |
20150139487 | IMAGE PROCESSOR WITH STATIC POSE RECOGNITION MODULE UTILIZING SEGMENTED REGION OF INTEREST - An image processing system comprises an image processor having image processing circuitry and an associated memory. The image processor is configured to implement a gesture recognition system comprising a static pose recognition module. The static pose recognition module is configured to identify a region of interest in at least one image, to represent the region of interest as a segmented region of interest comprising a union of segment sets from respective ones of a plurality of lines, to estimate features of the segmented region of interest, and to recognize a static pose of the segmented region of interest based on the estimated features. The lines from which the respective segment sets are taken illustratively comprise respective parallel lines configured as one of horizontal lines, vertical lines and rotated lines. A given one of the segments in one of the sets may be represented by a pair of segment coordinates. | 05-21-2015 |