Patents Assigned to Signal Processing, Inc.
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Patent number: 10192288Abstract: The present invention presents four fusion approaches, which can be directly applied to Worldview-3 (WV-3) images. Moreover, they can also be applied to other current or future satellite images that have similar characteristics of WV-3. The present invention also presents data processing methods, including image fusion method, anomaly detection method, material classification method, and concentration estimation method that utilize the high-resolution images generated by the mentioned fusion methods. There are four fusion approaches disclosed in the present invention, e.g. Parallel one-step fusion approach; Sequential fusion of various bands; Sequential-Parallel fusion; and Parallel-Sequential fusion.Type: GrantFiled: December 23, 2016Date of Patent: January 29, 2019Assignee: Signal Processing, Inc.Inventor: Chiman Kwan
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Patent number: 9159121Abstract: A method for removing noise from a noisy image includes a few important steps. The noise level of the noisy image is first estimated based on the smooth blocks of the image. The original image is divided into many small blocks. Each of these blocks is then converted from a two dimensional matrix to vector, which is a one dimensional array. The converted vectors are next grouped and then a matrix recovery process based on a principal component analysis (PCA) has been performed in order to remove the noise, wherein the key is to determine the number of principal components to retain during the denoising process. Next, the denoised vectors are converted back to the denoised blocks, and the denoised blocks are used to reconstruct a denoised image with a better image quality.Type: GrantFiled: February 18, 2014Date of Patent: October 13, 2015Assignee: SIGNAL PROCESSING, INC.Inventors: Chiman Kwan, Jin Zhou
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Patent number: 9117457Abstract: A noise cancellation device (NCD) comprises a microphone, an analog-to-digital converter, a digital-to-analog converter, a rechargeable battery, and a processor. The NCD acquires an audio input, from an external device such as a stethoscope or a cell phone, and passes the analog data into an ADC (analog-to-digital converter) for signal conversion. The digitized signals are then passed to the processor for further processing. The processor contains all the processing functions such as preprocessing (divide the input data into frames and apply shaping function to each frame), short term Fourier transform (STFT), adaptive filtering, inverse STFT, and signal synthesis.Type: GrantFiled: February 28, 2013Date of Patent: August 25, 2015Assignee: Signal Processing, Inc.Inventors: Chiman Kwan, Jin Zhou
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Publication number: 20150235350Abstract: A method for removing noise from a noisy image includes a few important steps. The noise level of the noisy image is first estimated based on the smooth blocks of the image. The original image is divided into many small blocks. Each of these blocks is then converted from a two dimensional matrix to vector, which is a one dimensional array. The converted vectors are next grouped and then a matrix recovery process based on a principal component analysis (PCA) has been performed in order to remove the noise, wherein the key is to determine the number of principal components to retain during the denoising process. Next, the denoised vectors are converted back to the denoised blocks, and the denoised blocks are used to reconstruct a denoised image with a better image quality.Type: ApplicationFiled: February 18, 2014Publication date: August 20, 2015Applicant: Signal Processing, Inc.Inventors: Chiman KWAN, Jin ZHOU
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Publication number: 20140243048Abstract: A noise cancellation device (NCD) comprises a microphone, an analog-to-digital converter, a digital-to-analog converter, a rechargeable battery, and a processor. The NCD acquires an audio input, from an external device such as a stethoscope or a cell phone, and passes the analog data into an ADC (analog-to-digital converter) for signal conversion. The digitized signals are then passed to the processor for further processing. The processor contains all the processing functions such as preprocessing (divide the input data into frames and apply shaping function to each frame), short term Fourier transform (STFT), adaptive filtering, inverse STFT, and signal synthesis.Type: ApplicationFiled: February 28, 2013Publication date: August 28, 2014Applicant: Signal Processing, Inc.Inventor: Signal Processing, Inc.
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Patent number: 8295561Abstract: This invention relates to a novel technology of fingerprint verifications and identifications based on the accumulated knowledge base.Type: GrantFiled: November 4, 2008Date of Patent: October 23, 2012Assignee: Signal Processing, Inc.Inventor: Chiman Kwan
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Patent number: 7082487Abstract: CMC boards have standardized dimensions for an “I/O envelope” (to accommodate components for I/O functions) and a “component envelope” (to accommodate components for core board functions). Daughter cards are developed (mainly to perform I/O functions but also to perform core board functions, if desired) that fit within the standardized dimensions of the I/O envelope.Type: GrantFiled: February 20, 2002Date of Patent: July 25, 2006Assignee: Spectrum Signal Processing, Inc.Inventors: Mohammad Darwish, Leonard G. Pucker, Phillip D. Smith, Roy Gee Leong Woo
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Patent number: 6845131Abstract: For a low voltage differential signalling technology to achieve more and faster processing, minimizing power consumption is important. A method of power management is provided whereby the transmitter circuitry is powered down at appropriate times and a minimum number of active links is maintained to maintain the integrity of the state of the logic in the receiver circuitry.Type: GrantFiled: October 3, 2000Date of Patent: January 18, 2005Assignee: Spectrum Signal Processing Inc.Inventors: Vivian John Ward, John Peter Van Baarsen
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Publication number: 20040103133Abstract: If there are N inputs into a decimate-by-M filter, a plurality (N/M) of decimate-by-N sub-filters is configured in parallel. Each decimation sub-filter outputs one sample, resulting in an aggregate of (N/M) output samples per processing cycle. The inputs to each sub-filter should be out of phase by M samples.Type: ApplicationFiled: November 27, 2002Publication date: May 27, 2004Applicant: Spectrum Signal Processing Inc.Inventor: Paul Thomas Gurney
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Patent number: 5710797Abstract: A single transducer digital communication receiver is described which is capable of extracting the data bits of at least one desired signal in the presence of interfering signals of similar type. The present invention also seeks to provide a communication system in which overlapping transmissions are tolerated and allowed. The present invention describes a design for a digital communication system, according to a specific frequency plan, which includes an appropriate digital demodulator that extracts the data bits of the desired signal(s) in the presence of closely spaced signals. The present invention enables reduced channel spacing in digital communication systems and thereby increases the system capacity (i.e. the number of users per bandwidth unit) without incurring any significant loss in system performance (e.g. power margins, BER, and channel availability). It also allows a reduced power margin that is required to maintain a pre-specified performance level without sacrificing system capacity.Type: GrantFiled: May 23, 1995Date of Patent: January 20, 1998Assignee: LIBIT Signal Processing Inc.Inventors: Mordechai Segal, Ofir Shalvi