Quantizer Or Inverse Quantizer Patents (Class 375/245)
  • Patent number: 11006111
    Abstract: A method for encoding an input signal comprising signal frames into quantized bits is disclosed, the method comprises generating, for each frame of the input signal, a signal matrix comprising matrix coefficients obtained from that frame, grouping the matrix coefficients of each signal matrix into a plurality of partition vectors, and for each partition vector, selecting one vector quantization scheme from among a plurality of vector quantization schemes and quantizing that partition vector according to the selected vector quantization scheme to obtain the quantized bits. In an adaptive mode, the method comprises grouping differently the matrix coefficients obtained from different frames, and/or selecting different vector quantization schemes for partition vectors obtained from different frames.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: May 11, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Panji Setiawan, Eyal Shlomot
  • Patent number: 10891966
    Abstract: An audio processing device includes a feature extraction unit and signal generating unit. The feature extraction unit is configured to extract a feature quantity of a first audio signal for each of a plurality of periods. The signal generating unit is configured to for generate a second audio signal by time axis expanding/compressing either a section of the first audio signal in which the feature quantity is steadily maintained for a period time, or a section of the first audio signal in which a fluctuation of the feature quantity is repeated and excluding from the time axis expanding/compressing a section of the first audio signal in which a fluctuation of the feature quantity is not similar to that of other sections of the first audio signal.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: January 12, 2021
    Assignee: YAMAHA CORPORATION
    Inventor: Akira Maezawa
  • Patent number: 10542253
    Abstract: A method of signaling of coding modes including an IntraBC mode (Intra-block copy mode) to improve the coding efficiency is disclosed. The embodiment takes into consideration the facts that Inter prediction is more common in Inter slices than IntraBC prediction. In another embodiment, a binary sub-tree is disclosed that includes all the partition modes associated with IntraBC mode and the binary sub-tree consists of only said all members of the partition mode group.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: January 21, 2020
    Assignee: HFI Innovation Inc.
    Inventors: Shan Liu, Xiaozhong Xu
  • Patent number: 10506313
    Abstract: Embodiments relate to the field of PON technologies, and provide a method, apparatus, and system. The method includes: receiving capability information that is sent by an ONU by using a first preamble; calculating a tap coefficient based on the received first preamble if the capability information indicates that the ONU has an equalization capability; sending the tap coefficient to the ONU, where the ONU updates a tap coefficient of a first equalizer in the ONU based on the received tap coefficient, and when subsequently sending upstream data, sends, by using a second preamble, the upstream data equalized by using the first equalizer, and a length of the second preamble is less than a length of the first preamble; receiving the upstream data; and equalizing the received upstream data based on the second preamble by using a second equalizer in an OLT. In this way, upstream overheads can be reduced.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: December 10, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jianyu Zheng, Shengping Li, Xuming Wu
  • Patent number: 10425191
    Abstract: An information processing method, an apparatus, a communications device, and a communications system are provided. The communications device is configured to: obtain a starting position in a buffer sequence W for an output bit sequence, and determine the output bit sequence from the buffer sequence W based on the starting position, where a value of the starting position is one element in {p0, p1, p2, . . . , pkmax?1}, 0?k<kmax, 0?pk<NCB, pk is an integer, k is an integer, NCB is a length of the buffer sequence W, kmax is an integer greater than or equal to 4, and there are two or more different neighboring intervals in {p0, p1, p2, . . . , pkmax?1}. A bit sequence for initial transmission or retransmission is properly determined, so that decoding performance of a communications device on a receive end after receiving the bit sequence is improved, a decoding success rate is enhanced, and a quantity of retransmission times is further reduced.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: September 24, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Liang Ma, Xin Zeng, Chen Zheng, Xiaojian Liu, Yuejun Wei
  • Patent number: 10356061
    Abstract: A process of hiding one or more public keys inside of random noise is introduced, whose purpose is to protect the privacy of the public keys. In some embodiments, the random noise is produced by quantum randomness, using photonic emission with a light emitting diode. When the public key generation and random noise have the same probability distributions, and the key size is fixed, the security of the hiding can be made arbitrarily close to perfect secrecy, by increasing the noise size. The process of hiding can protect public keys that are vulnerable to Shor's algorithm or analogs of Shor's algorithm, executed by a quantum computer. The hiding process is practical in terms of infrastructure and cost, utilizing the existing TCP/IP infrastructure as a transmission medium, and a light emitting diode(s) in the random noise generator.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: July 16, 2019
    Assignee: Fiske Software, LLC
    Inventor: Michael Stephen Fiske
  • Patent number: 10355815
    Abstract: A system uses multi-level encoding where each symbol of a plurality of symbols represents more than one bit of information in a user data symbol stream for transfer using a multilevel transmission channel. The user data symbols are represented in a digital bitwise form such that each symbol is presented as a plurality of bits and each bit is subject to a different probability of error. An error correction procedure is applied based on the different error probability that is associated with each bit in the plurality. The channel can be configured to support a mosaic tile structure, each tile containing a channel symbol such that a selected tile has a collective error probability that is different from other tiles. Customized coding can be applied to the tile structure to allocate a selected amount of error correction power to the selected tile based on an overall available correction power.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: July 16, 2019
    Assignee: Micron Technology, Inc.
    Inventors: Bruce A. Liikanen, Stephen P. Van Aken, Gerald L. Cadloni, John L. Seabury, Robert B. Eisenhuth
  • Patent number: 10134418
    Abstract: The present technique relates to a frequency band extension apparatus, a frequency band extension method, and a program which are configured to more easily obtain a high quality sound signal. An input signal may be divided into sub-band signals of a plurality of sub-bands, powers of high frequency sub-bands of the input signal may be estimated based on feature values extracted from the input signal to obtain high frequency sub-band power estimation values, the high frequency sub-band powers obtained from the sub-band signals of high-frequency sub-bands of the input signal may be compared with the high frequency sub-band power estimation values, and a high-frequency signal of the input signal may be generated based on a result of the comparison and the sub-band signals.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: November 20, 2018
    Assignee: SONY CORPORATION
    Inventors: Yuki Yamamoto, Toru Chinen
  • Patent number: 10102176
    Abstract: Methods and apparatus for enabling rapid transactions over a speed limited bus are disclosed. In one exemplary embodiment of the present disclosure, a host controller and an application specific integrated circuit (ASIC) are connected via an Inter-Integrated Circuit (I2C) Bus that is further adapted to enable a simplified signaling scheme. Unlike traditional I2C bus transactions which are flexible but speed limited, the simplified signaling scheme reduces bus overhead and enables rapid transactions. In an exemplary context, the simplified signaling scheme enables the ASIC to rapidly configure a series of photodiodes with different channel gain parameters so as to, for example, measure heartbeats by visually detecting a pulse within human flesh.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: October 16, 2018
    Assignee: Apple Inc.
    Inventors: Dong Zheng, Joseph William Colosimo, Venkata Siva Sunil Kumar Reddy Bommu
  • Patent number: 10079825
    Abstract: In an RFID system, a method and apparatus for linking an RFID tag to an associated object. The system includes a relatively simple tag, a reader, a linker, and a store. The reader interrogates the tag for an ID and selectively provides the ID to the linker. The linker, in turn, uses the ID to provide back to the reader an associated Uniform Resource Identifier (“URI”). The reader then forwards the URI to the store. In response, the store returns to the reader the object associated with the ID via the URI. The disclosed method and apparatus provide more efficient and secure tag authentication.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: September 18, 2018
    Assignee: RFMICRON, INC.
    Inventors: Shahriar Rokhsaz, Edwin de Angel
  • Patent number: 9986069
    Abstract: Devices and methods to compress sensor data are generally described herein. An exemplary wearable device to compress sensor data may include a sensor including circuitry to sense sensor data, and a communication circuit to receive, from a remote device, a detected link quality of a low-power communication channel used to communicate with the remote device. The communication circuit further to transmit compressed data to a remote device over the low power communication channel. The wearable device may further include a compressible sensor data module to apply a compression algorithm to compress received sensor data based on the detected link quality to provide the compressed sensor data.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: May 29, 2018
    Assignee: Intel Corporation
    Inventors: Fai Yeung, Jinshi James Huang
  • Patent number: 9635334
    Abstract: Disclosed are various embodiments directed to transcoding a bit stream comprising audio and video frames that contains discontinuities. The video and/or audio portion of the bit stream may be divided into segments, where some of the segments are transcoded in parallel using a plurality of transcoder devices. In some embodiments, a discontinuity is detected in the bit stream before encoding, where the discontinuity is associated with a shift in a set of time stamps associated with the bit stream. A magnitude of the discontinuity is determined. The transcoding system aligns at least a portion of the audio frames to the series of video frames according to at least the discontinuity and the magnitude of the discontinuity. In other embodiments, the discontinuity is detected after encoding by analyzing time stamps that have been established during the transcoding process.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: April 25, 2017
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Alexander Garland MacInnis, Hongtao Zhu, Jason William Herrick, Brian Francis Schoner, Junlin Li
  • Patent number: 9595270
    Abstract: In one aspect, the invention provides an audio encoding method characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode. In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including interharmonic noise attenuation, and being characterized in a step of disabling the post filter in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: March 14, 2017
    Assignee: Dolby International AB
    Inventors: Barbara Resch, Kristofer Kjörling, Lars Villemoes
  • Patent number: 9558753
    Abstract: In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio encoder or audio decoder having a coding mode selected from at least two distinct coding modes, and the pitch filter is capable of being selectively operated in either the active mode or the inactive mode while operating in the coding mode based on control information.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: January 31, 2017
    Assignee: Dolby International AB
    Inventors: Barbara Resch, Kristofer Kjörling, Lars Villemoes
  • Patent number: 9552824
    Abstract: Disclosed is a method, apparatus and non-transitory computer readable storage medium, which is configured to examine an input audio signal to determine an estimated pitch period associated with a detection criterion, encode the filtered audio signal to generate a compressed audio bit stream, decode the compressed audio bit stream to generate a decoded audio signal and adaptively filtering the decoded audio signal to produce an output audio signal, wherein adaptively filtering the decoded audio signal comprises filtering each of a plurality of segments of the decoded audio signal in a manner that is dependent upon the estimated pitch period associated therewith, and wherein a pitch-based post-filter operates to shape noise components located between harmonics of the input audio signal.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: January 24, 2017
    Assignee: Dolby International AB
    Inventors: Barbara Resch, Kristofer Kjörling, Lars Villemoes
  • Patent number: 9491486
    Abstract: Methods of encoding and decoding for video data are describe in which significance maps are encoded and decoded using non-spatially-uniform partitioning of the map into parts, wherein the bit positions within each part are associated with a given context. Example partition sets and processes for selecting from amongst predetermined partition sets and communicating the selection to the decoder are described.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: November 8, 2016
    Inventors: Gergely Ferenc Korodi, Jinwen Zan, Dake He
  • Patent number: 9374343
    Abstract: A system uses multi-level encoding where each symbol of a plurality of symbols represents more than one bit of information in a user data symbol stream for transfer using a multilevel transmission channel. The user data symbols are represented in a digital bitwise form such that each symbol is presented as a plurality of bits and each bit is subject to a different probability of error. An error correction procedure is applied based on the different error probability that is associated with each bit in the plurality. The channel can be configured to support a mosaic tile structure, each tile containing a channel symbol such that a selected tile has a collective error probability that is different from other tiles. Customized coding can be applied to the tile structure to allocate a selected amount of error correction power to the selected tile based on an overall available correction power.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: June 21, 2016
    Assignee: Micron Technology, Inc.
    Inventors: Bruce A. Liikanen, Stephen P. Van Aken, Gerald L. Cadloni, John L. Seabury, Robert B. Eisenhuth
  • Patent number: 9269427
    Abstract: A resistive memory device. Implementations may include an array of memory cells including resistive memory elements which are coupled to isolation transistors and which may include a magnetic tunnel junction. A decoder decodes input address information to select a row of the array. A binarizer coupled to the memory array assigns binary weights to outputs of the memory array output through bit lines coupled to the memory cells. A summer sums the binary weighted outputs, and a quantizer generates an output digital code corresponding to data stored in a plurality of memory cells during a prior program cycle. The outputs of the memory array may be currents or voltages. In implementations multiple arrays of memory cells may be utilized and their respective outputs combined to form higher bit outputs, such as eight bit, twelve bit, sixteen bit, and so forth.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: February 23, 2016
    Inventor: Peter K. Nagey
  • Patent number: 9262808
    Abstract: An input image is denoised by first constructing a pixel-wise noise variance map from the input image. The noise has spatially varying variances. The input image is partitioned into patches using the noise variance map. An intermediate image is determined from the patches. Collaborative filtering is applied to each patch in the intermediate image using the noise variance map to produce filtered patches. Then, the filtered patches are projected to an output image.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: February 16, 2016
    Assignee: MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventors: Fatih Porikli, Akshay Soni
  • Patent number: 9118469
    Abstract: Embodiments of methods and apparatus for reducing electromagnetic interference of a received signal are disclosed. One method includes receiving a signal over at least two conductors, extracting a common-mode signal from the at least two conductors, processing the common-mode signal, and reducing electromagnetic interference of the received signal by summing the processed common-mode signal with the received signal.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: August 25, 2015
    Assignee: Aquantia Corp.
    Inventors: Moshe Malkin, Jose Tellado
  • Patent number: 9035812
    Abstract: A modulator and a method are disclosed. The modulator is for generating a band pass signal and comprises: sigma delta modulation logic operable to receive an input signal and to perform at least a 3-level quantisation of the input signal to generate an at least 3-level quantised signal; and requantisation logic operable to requantise the at least 3-level quantised signal to a 2-level quantised signal to be provided as the band pass signal. This approach improves the coding efficiency achieved compared to that possible using a 2-level sigma delta modulator, whilst also providing improved noise performance due to the inherent linearity of the 2-level quantised signal which is provided to drive the switch mode power amplifier. Accordingly, the performance of the modulator is improved by increasing its coding efficiency whilst maintaining its linearity which improves the noise performance in adjacent channels.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: May 19, 2015
    Assignee: Alcatel Lucent
    Inventor: Tomasz Podsiadlik
  • Patent number: 8922400
    Abstract: A method is disclosed for compressing a sequence of initial digital values into a compressed sequence of compressed values, intending to restore these values into a decompressed sequence of decompressed values. For a first initial value of the sequence, the compressed value of the first initial value is equal to the first initial value and the decompressed value of the compressed value of the first initial value is equal to the first initial value.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: December 30, 2014
    Assignee: I-CES (Innovative Compression Engineering Solutions)
    Inventor: Than Marc-Eric Gervais
  • Patent number: 8923414
    Abstract: One embodiment includes an adaptive sample quantization system. The adaptive sample quantization system includes an antenna to receive a radio frequency (RF) signal having data encoded therein, and analog antenna electronics configured to convert the RF signal to an analog electrical signal. The system also includes an analog-to-digital converter (ADC) directly coupled to the antenna and configured to generate a plurality of consecutive digital samples of the RF signal. The system further includes a quantizer to determine a mode based on the plurality of consecutive digital samples and to select at least one threshold based on the determined mode. The quantizer can further compare each digital sample with the at least one threshold to generate a corresponding one of a plurality of output samples having a reduced number of bits relative to the respective digital sample to substantially mitigate potential interference and facilitate extraction of the data.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: December 30, 2014
    Assignee: Northrop Grumman Guidance and Electronics Company, Inc.
    Inventors: Sanjeev Gunawardena, Jeff Dickman, Mathew A Cosgrove
  • Patent number: 8923391
    Abstract: A control method for an encoding apparatus which performs bit rate control includes an acquiring step of acquiring a first quantization parameter as a quantization parameter to be used for quantizing a rate control unit, a first calculating step of calculating an evaluation value from a preset rate and a rate of an actually encoded rate control unit, a first setting step of, if the evaluation value is within a predetermined range, setting the first quantization parameter acquired by the acquiring step as a quantization parameter to be used for quantizing a rate control unit, and a second setting step of, if the evaluation value is not within the predetermined range, setting a second quantization parameter on the basis of the calculated evaluation value as a quantization parameter to be used for quantizing a rate control unit.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: December 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masaaki Kobayashi
  • Patent number: 8902997
    Abstract: On a criterion to minimize the entropy of the linear prediction residual of the input signal used for calculation of the input PARCOR coefficient sequence, PARCOR coefficients with larger absolute values are quantized with higher quantization precisions so as to reduce the increase of the code amount of the linear prediction residual caused by the quantization error of the PARCOR coefficients. If the PARCOR coefficient is represented by a value formed by a predetermined number of bits, the number of effective bits from the most significant bit toward the least significant bit included in the output value increases with the absolute value of the PARCOR coefficient.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: December 2, 2014
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yutaka Kamamoto, Noboru Harada, Takehiro Moriya
  • Patent number: 8898053
    Abstract: An encoding device, a decoding device, and related methods are provided that eliminate the loss of synchronization of the adaptive filters of a terminal at the encoding end and a terminal at the decoding end caused by transmission errors. Deterioration of the sound quality is suppressed when a multiple channel signal is encoded with high efficiency using an adaptive filter. In the terminal at the encoding end, a buffer stores updated filter coefficients. When packet loss detection information indicating whether there is any packet loss in the terminal at the decoding end indicates that there is packet loss, a switch outputs the past filter coefficients of the previous (NX+1) frames from the buffer to an adaptive filter. The adaptive filter uses the past filter coefficients of the previous (NX+1) frames to conduct filtering.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: November 25, 2014
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventor: Masahiro Oshikiri
  • Patent number: 8805432
    Abstract: The transmission power is decreased in an appropriate manner, while suppressing the deterioration of the line quality to the minimum. A mobile communication terminal 1 controls the transmission power in response to a request given from a base transceiver station 2. When an average transmission power Wa that is an average value of the transmission power in a monitoring period Ta is smaller than a threshold value TH, mobile communication terminal 1 continuously controls the transmission power in response to the request given by the base transceiver station 2. When the average transmission power Wa in the monitoring period Ta is equal to or greater than the threshold value TH, the transmission power is controlled in a transmission power suppressing period Tb that follows the monitoring period Ta so that the average value of the transmission power becomes equal to or smaller than the threshold value in a control period Tc including the monitoring period Ta and the transmission power suppressing period Tb.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: August 12, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hidetoshi Suzuki, Takashi Okada, Teruo Onishi
  • Patent number: 8798212
    Abstract: A method and apparatus for processing feedback implemented in a wireless transmit/receive unit (WTRU) comprises estimating a channel matrix. The effective channel is calculated and a precoding matrix is selected. Feedback bits are generated and transmitted.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: August 5, 2014
    Assignee: Interdigital Technology Corporation
    Inventors: Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Patent number: 8731051
    Abstract: A video processor is described, which is useful for implementing a quantization process, in compliance with the H.264 standard. The video processor includes an input, for receiving a block of image data. The image data is loaded into an internal register. In response to receiving a SIMD instruction, a quantizer, which incorporates the quantization lookup tables associated with the H.264 standard in its associated hardware, makes necessary high-level quantization decisions. In response to receiving another SIMD instruction, the quantizer uses those high-level quantization decisions to retrieve specific values from the quantization lookup tables.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: May 20, 2014
    Assignee: Nvidia Corporation
    Inventors: Pankaj Chaurasia, Shankar Moni
  • Patent number: 8711952
    Abstract: An analog to digital converter with increased sub-range resolution. The device includes an analog front end that produces an analog communication signal, a digital front end that receives a digital communication signal, and an Analog to Digital Converter (ADC) that samples the analog communication signal across a full-range. The ADC includes a full-range ADC having a first quantization accuracy configured to sample the analog communication signal across the full-range and a central sub-range ADC having a second quantization accuracy greater than the first quantization accuracy and configured to sample the analog communication signal across a central sub-range of the full-range. The ADC also includes signal combining circuitry configured to process outputs of the full-range ADC and the central sub-range ADC to create the digital communication signal.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: April 29, 2014
    Assignee: Broadcom Corporation
    Inventors: Keith Findlater, Seyed A A Danesh, Jonathan Ephraim David Hurwitz
  • Patent number: 8682312
    Abstract: A method, a system, and a service control point (SCP) for realizing call management are provided. The method for realizing call management includes: inquiring user information of a calling terminal according to a call request message of the calling terminal; sending the user information of the calling terminal, over a called terminal; and exercising a corresponding call control according to a response made by the called terminal to a call carrying the user information of the calling terminal. With the method, system, and SCP for realizing call management provided by the embodiments of the present invention, the called terminal may selectively answer the call according to the user information of the calling terminal, thereby avoiding disturbing the work due to answering some unnecessary calls.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: March 25, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Qian Yu
  • Patent number: 8654900
    Abstract: Provided is a wireless communication device which can improve the notification accuracy of the channel state information (CSI) without straining the feedback circuit. In this device, a channel estimator (105) uses a pilot signal input from a wireless receiver (102) to estimate the channel and obtain a plurality of path gains in each of a plurality of delay periods. Then, the channel estimator (105) outputs the plurality of path gains to a quantizer (107). The quantizer (107) quantizes the plurality of path gains in the number of notification bits corresponding to each of the plurality of delay periods based on the correspondence of the delay period and the number of notification bits input from a setting unit (106).
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: February 18, 2014
    Assignee: Panasonic Corporation
    Inventors: Shinsuke Takaoka, Katsuhiko Hiramatsu, Akihiko Nishio, Ryohei Kimura, Yoshiko Saito, Megumi Ichikawa
  • Patent number: 8619882
    Abstract: A data modulation circuit has an adder adding an input signal, and an output signal of a memory device; and an output circuit part discriminating and quantizing the output signal of the adder by a predetermined threshold value. The memory device receives and holds the output signal of the adder and a predetermined signal, and supplies the held signals to the adder as an output signal of the memory device.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: December 31, 2013
    Assignee: Fujitsu Semiconductor Limited
    Inventor: Uichi Sekimoto
  • Patent number: 8594205
    Abstract: A method and apparatus reliably encode and decode information over a communication system. The method includes transforming two coefficients into two pairs of random variables, one random variable in each pair having substantially equal energy as one random variable in the other pair. The method further includes quantizing each of the pairs of random variables and entropy coding each quantized random variable separately creating an encoded bitstreams. The encoded bitstreams are received by a decoder which first determines which channels of the communication system are working. The encoded bitstream is entropy decoded, inversed quantized and inversed transformed. An inverse transform performs three different transformations depending upon which channels are working, i.e., whether the first, second or both channels are working.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: November 26, 2013
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Hamid Jafarkhani, Michael T. Orchard, Amy R. Reibman, Yao Wang
  • Patent number: 8594226
    Abstract: The digital delta-sigma modulator includes a signal input for receiving digital samples of N bits, and a digital filter connected to the signal input. The digital filter performs addition/subtraction and integration operations according to a redundant arithmetic coding for delivering digital filtered samples. A quantizer performs a nonexact quantization operation so as to deliver digital output samples of n bits, with n being less than N. The input of the quantizer is connected within the digital filter.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: November 26, 2013
    Assignees: STMicroelectronics SA, Centre National de la Recherche Scientifique
    Inventors: Andreia Cathelin, Antoine Frappe, Andreas Kaiser
  • Patent number: 8595001
    Abstract: A method applies a parametric approach to bandwidth extension but does not require training. The method computes narrowband linear predictive coefficients from a received narrowband speech signal, computes narrowband partial correlation coefficients using recursion, computes Mnb area coefficients from the partial correlation coefficient, and extracts Mwb area coefficients using interpolation. Wideband parcors are computed from the Mwb area coefficients and wideband LPCs are computed from the wideband parcors. The method further comprises synthesizing a wideband signal using the wideband LPCs and a wideband excitation signal, highpass filtering the synthesized wideband signal to produce a highband signal, and combining the highband signal with the original narrowband signal to generate a wideband signal.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: November 26, 2013
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: David Malah, Richard Vandervoort Cox
  • Patent number: 8582639
    Abstract: Encoding and decoding methods that perform quantization using adaptive reconstruction levels are presented. The reconstruction levels for a given partitioning of the data space may be selected based upon the distribution of data points within each sub-part defined by the partitioning. In some cases, the adaptive reconstruction levels may be based upon an average of the data points within each sub-part. In some cases, the adaptive reconstruction levels may be selected using a rate-distortion analysis including the quantization distortion associated with the levels versus the data points and the rate associated with transmitting the encoded adaptive reconstruction levels. The methods relate to data compression in a range of applications including audio, images and video.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: November 12, 2013
    Assignee: BlackBerry Limited
    Inventors: Dake He, Xiang Yu, En-Hui Yang
  • Patent number: 8571151
    Abstract: Certain aspects of the present disclosure relate to a method for emulating N-bits uniform quantization of a received pulse signal by using one-bit signal measurements. One method for wireless communications includes receiving a signal transmitted over a wireless channel, wherein the signal comprises a sequence of pulses, applying gain values to the pulses to obtain a binary matrix for each gain value, generating a probability vector for each gain value using the binary matrix obtained for that gain value, and generating an output signal by linearly combining the probability vectors.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: October 29, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Yann Barbotin, Petru Cristian Budianu
  • Patent number: 8521522
    Abstract: There is provided an audio coding device which appropriately sets the quantization bit number by a small calculation amount in each stage when coding an input audio signal by performing multi-stage normalization/quantization. A quantization information calculation section determines total quantization information idwl0, based on normalization information idsf, and allocates the total quantization information idwl0 for quantization information idwl1 and quantization information idwl2. At this time, the quantization information calculation section limits the quantization information idwl1 by a limiter lim1, and allocates the total quantization information idwl0 for quantization information idwl1. If the quantization information idwl1 exceeds the limiter lim1, the excess is allocated for the quantization information idwl2. A first normalization section and a first quantization section normalizes and quantizes a frequency spectrum mdspec1 in the first stage.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: August 27, 2013
    Assignee: Sony Corporation
    Inventors: Yuuki Matsumura, Shiro Suzuki, Keisuke Toyama, Mitsuyuki Hatanaka, Yuhki Mitsufuji
  • Patent number: 8504847
    Abstract: A data element can be encoded into multiple encoded data elements using an encoding algorithm that includes an encoding function and one or more encoder constant. The encoded data elements can be organized into multiple pillars, each having a respective pillar number. Each of the pillars is sent to a different storage unit of a distributed storage network. To recover the original data element, the encoded data elements are retrieved from storage, and the encoder constant is recovered using multiple encoded data elements. Recovering the encoder constant allows the encoding algorithm originally used to encode the data elements to be determined, and used to recover the original data element. The security of the stored data is enhanced, because an encoded data element from a single pillar is insufficient to identify the encoder constant.
    Type: Grant
    Filed: April 18, 2010
    Date of Patent: August 6, 2013
    Assignee: Cleversafe, Inc.
    Inventors: Jason K. Resch, Wesley Leggette
  • Patent number: 8498658
    Abstract: Techniques, apparatuses and systems for providing communications based on time reversal of a channel impulse response of a pulse in a transmission channel between a transmitter and a receiver to enhance reception and detection of a pulse at the receiver against various effects that can adversely affect and complicate the reception and detection of the pulse at the receiver.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: July 30, 2013
    Assignee: Ziva Corporation
    Inventors: David F. Smith, Anis Husain
  • Patent number: 8498355
    Abstract: There are provided a transmission and reception device having a function for correcting a data error in a communication path. In the transmission device, a redundant bit addition unit adds a redundant bit to each data bit which has been divided by one bit by a division unit; and an interleaver performs interleave. The transmission device transmits a signal which has been subjected to FM modulation by an FM modulation unit. In the reception device, a symbol decision unit performs a symbol decision at a Nyquist point for a signal which has been FM-demodulated by an FM demodulation unit; a bit conversion unit performs bit conversion according to the result of symbol decision; and a frame recovery unit deletes the redundant bit added by the redundant bit addition unit of the transmission device, from the bit string de-interleaved by a de-interleaver. Thus, it is possible to surely perform an error correction with a simple configuration even when the communication state is not in a preferable environment.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: July 30, 2013
    Assignee: Kabushiki Kaisha Kenwood
    Inventor: Taichi Majima
  • Patent number: 8494071
    Abstract: There are provided a transmission and reception device having a function for correcting a data error in a communication path. In the transmission device, a redundant bit addition unit adds a redundant bit to each data bit which has been divided by one bit by a division unit; and an interleaver performs interleave. The transmission device transmits a signal which has been subjected to FM modulation by an FM modulation unit. In the reception device, a symbol decision unit performs a symbol decision at a Nyquist point for a signal which has been FM-demodulated by an FM demodulation unit; a bit conversion unit performs bit conversion according to the result of symbol decision; and a frame recovery unit deletes the redundant bit added by the redundant bit addition unit of the transmission device, from the bit string de-interleaved by a de-interleaver. Thus, it is possible to surely perform an error correction with a simple configuration even when the communication state is not in a preferable environment.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: July 23, 2013
    Assignee: Kabushiki Kaisha Kenwood
    Inventor: Taichi Majima
  • Patent number: 8488720
    Abstract: Methods and systems for signal quantization may include, but are not limited to: receiving a complex signal characterized by a real portion and an imaginary portion; computing a vector magnitude of a sample of the complex signal; comparing the vector magnitude of the sample to a quantization threshold value; and associating a quantized magnitude with the sample according to a comparison between the vector magnitude of the sample and the quantization threshold value.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: July 16, 2013
    Assignee: Rockwell Collins, Inc.
    Inventor: Carlos J. Chavez
  • Patent number: 8488684
    Abstract: Certain embodiments of the present disclosure allow a receiver to utilize both a minimum mean square error (MMSE) detection algorithm and a maximum likelihood (ML) detection algorithm. The receiver may control, based on various conditions, a mode selection signal to select between output generated with the MMSE detection algorithm and the ML detection algorithm. By sharing logical components, certain embodiments may allow a receiver to implement both ML and MMSE detection algorithms with minimal computational overhead when compared to implementing a single one of the decoding algorithms.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: July 16, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Jong Hyeon Park, Youngjae Kim, Je Woo Kim
  • Patent number: 8483291
    Abstract: An analog to digital converter with increased sub-range resolution and method for using the analog to digital converter is described herein. The device includes an analog front end that produces an analog communication signal, a digital front end that receives a digital communication signal, and an Analog to Digital Converter (ADC) that samples the analog communication signal across a full-range. The ADC includes a plurality of sub-range ADCs, each sub-range ADC measuring the analog communication signal across at least one respective sub-range of the full-range, the plurality of sub-ranges extending across the full-range, a central sub-range ADC having greater quantization accuracy than at least one other sub-range ADC. The ADC also includes signal combining circuitry operable to process outputs of the plurality of sub-range ADCs to create the digital communication signal.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: July 9, 2013
    Assignee: Broadcom Corporation
    Inventors: Keith Findlater, Seyed A A Danesh, Jonathan Ephraim David Hurwitz
  • Patent number: 8457185
    Abstract: A wireless communication device sets a digital link on a wireless channel between a master device and a slave device, compresses a sound signal in an ADPCM scheme, and carries the sound signal in a sound packet to perform communication. In a master device, a PCM signal is converted into ADPCM data by an ADPCM encoding unit. Next, the least significant bit of n-bits is set according to the number of “1” of the n-bits of the ADPCM data by a transmission conversion table. In a slave device, it is determined whether error has occurred according to the number of “1” of the n-bit data in received data. If error exists, the n-bit sound data is converted into mute data through a reception conversion table. The sound data converted through the reception conversion table is converted into a PCM signal from an ADPCM format by an ADPCM decoding unit.
    Type: Grant
    Filed: December 25, 2009
    Date of Patent: June 4, 2013
    Assignee: Panasonic Corporation
    Inventors: Yutaka Suwa, Hiroyuki Ishihara
  • Patent number: 8390906
    Abstract: Methods and systems are presented for characterizing a printer, display or other color reproduction device in which a forward color transform having a parametric surface forward color transform and a nonparametric residual forward color transform is updated by adapting the parametric surface forward color transform using an input adaptation data set and a measured adaptation data set, generating a prediction data set in the second color space using the adapted parametric surface forward color transform and the nonparametric residual forward color transform, generating a prediction error data set in the second color space using the input adaptation data set and the prediction data set, generating a membrane forward color transform using the prediction error data set, and updating the forward color transform using the adapted parametric and nonparametric forward color transforms.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 5, 2013
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Juan Liu, Haitham Hindi
  • Patent number: 8390885
    Abstract: Methods and systems are presented for characterizing a printer, display or other color reproduction device in which parametric and nonparametric forward color transforms are generated to construct a forward color device transform to characterize the mapping of CMYK input data to La*b* data of the device, with the parametric transform adapted to compensate for drifting performance of the color reproduction device.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 5, 2013
    Assignees: Palo Alto Research Center Incorporated, Xerox Corporation
    Inventors: Juan Liu, Haitham Hindi, Lalit Keshav Mestha, Kenneth J. Mihalyov
  • Patent number: 8300711
    Abstract: An adaptive differential pulse-code modulation-demodulation system and method thereof is provided. The method includes steps of modulating an analog audio input signal into a data packet, including a plurality of digital data through adaptive differential pulse-code modulation, an initial value and a scale factor associated with the digital data, to be sent to the communication network, and demodulating the data packet according to the digital data, the initial value and the scale factor, thereby reconstructing the data packet to an analog audio output signal.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: October 30, 2012
    Assignee: MStar Semiconductor, Inc.
    Inventor: Chu-Feng Lien