Length Coding Patents (Class 375/253)
  • Patent number: 10341149
    Abstract: For example, an apparatus may include one or more processors comprising circuitry to cause a first wireless device to generate a wakeup packet comprising a payload first wireless device to generate a wakeup packet comprising a payload comprising at least one payload field modulated according to an On-Off keying (OOK) modulation, the payload field comprising a sequence of a plurality of codes to encode binary bit values of the payload field according to an encoding scheme having a code rate less than one, a first code of the encoding scheme representing a binary bit value of “0” comprising a first sequence of two or more bits comprising at least one bit having a value of “1”, and a second code of the encoding scheme representing a binary bit value of “1” comprising a second sequence of two or more bits comprising at least one bit having a value of “1”; and to transmit the wakeup packet to a second wireless device.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: July 2, 2019
    Assignee: INTEL CORPORATION
    Inventors: Minyoung Park, Shahrnaz Azizi
  • Patent number: 10057010
    Abstract: A method for receiving data frames which consists of determining a reference frame by firm decisions on the value of each bit received and then verifying the reference frame according to an integrity check code used for the transmission. The method may include the following steps: calculating, for each bit of said reference frame, a plausibility value that represents the probability of a transmission error; and, in the event of incompatibility with said integrity check code, identifying in said reference frame a non-empty finite set of the most plausibly erroneous bits in accordance with said plausibility values; listing candidate frames each corresponding respectively to one of the possible combinations of numbers of reversals of the identified most plausibly erroneous bits; and verifying the compatibility of the listed candidate frames with said integrity check code.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: August 21, 2018
    Assignee: GRDF
    Inventor: Jean Louis Dornstetter
  • Patent number: 9882738
    Abstract: Systems and techniques for single-wire communications are described. A described technique includes detecting transitions on a single-wire bus that are produced by a host device, determining an estimated baud rate of the host device based on the transition, and communicating with the host device based on the estimated baud rate. Determining the estimated baud rate can include charging a capacitor based on a charging rate in response to a detection of a first transition of the transitions, sampling a capacitor voltage associated with the capacitor in response to a detection of a second transition of the transitions, and adjusting the charging rate based on a comparison between the capacitor voltage and a reference voltage.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: January 30, 2018
    Assignee: Atmel Corporation
    Inventors: Danut Manea, Jeffrey P. Kotowski
  • Patent number: 9490999
    Abstract: Systems and techniques for single-wire communications are described. A described technique includes detecting transitions on a single-wire bus that are produced by a host device; determining an estimated baud rate of the host device based on the transitions by approximating a bit transition rate associated with the transitions by iteratively adjusting a charging rate of a capacitor to match the bit transition rate; and communicating with the host device based on the estimated baud rate.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: November 8, 2016
    Assignee: Atmel Corporation
    Inventors: Danut Manea, Jeffrey P. Kotowski
  • Patent number: 9294251
    Abstract: The receiving device receives a transmitted signal from a transmitting device by dividing by N the spectrum of a signal to be transmitted and performing spectrum editing to reduce its occupied bands. The receiving device generates a first decoded signal by error-correcting and decoding this received signal in the bandwidth of the signal to be transmitted, and generates a transmission replica signal from this first decoded signal and divides by N the spectrum of this transmission replica signal to generate N sub-replicas. The receiving device generates a compensated received signal by restoring the spectrum of the signal to be transmitted from the transmitting device using the N sub-replicas and the received signal, and decodes this compensated received signal to generate a second decoded signal.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: March 22, 2016
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Jun Mashino, Takatoshi Sugiyama
  • Patent number: 9252807
    Abstract: Exemplary method, system, and computer program product embodiments for efficient one-pass cache-aware compression are provided. In one embodiment, by way of example only, an output of a fast compressor to Huffman encoding for achieving the one-pass cache-aware compression by using a predetermined Huffman-tree upon determining by the fast compressor a final representation of each data byte.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: February 2, 2016
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Jonathan Amit, Jonathan Fischer-Toubol, Nir Halowani, Danny Harnik, Ety Khaitzin, Sergey Marenkov, Gil Shapira, Dmitry Sotnikov, Shai Tahar
  • Patent number: 9246654
    Abstract: In a radio network node, a reference signal is transmitted over an antenna port, in a code division multiplexing (CDM) group. The CDM group includes CDM subgroups of resource elements, the CDM subgroups being transmitted on different subcarriers. First, the radio network node transmits the reference signal over a first CDM subgroup using an orthogonal cover code (OOC). The first CDM subgroup includes resource elements in a first time slot and a subsequent time slot. Then, the radio network node transmits the reference signal over a second CDM subgroup using a permutation of the OOC. The second CDM subgroup includes resource elements in the first time slot and the second time slot. The permutation of the OOC is selected such that to enable decoding of the reference signal in the frequency domain, by applying the OOC only to resource elements in the CDM group in the first time slot.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: January 26, 2016
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Yang Hu, Xinghua Song, Jianfeng Wang
  • Patent number: 8938014
    Abstract: A serializer/deserializer for a network device includes a data module configured to generate parallel data and side band data. A serializer is configured to convert the parallel data to serialized data for transmission over a communication channel, wherein the serialized data includes a serial data waveform. A side band transmission module is configured to generate a clock signal, inject the clock signal with side band data to generate a modulated clock signal, and apply the modulated clock signal to the serialized data to generate a modified serial data waveform. The modified serial data waveform includes the serialized data and the side band data and includes pulses with an increased pulse width and/or a decreased pulse width with respect to the serial data waveform. The serializer is configured to transmit, over the communication channel, the modified serial data waveform including the serialized data and the side band data.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: January 20, 2015
    Assignee: Marvell International Ltd.
    Inventors: Gang Wang, Wei Zhou, Chee Hoe Chu, Po-Chien Chang
  • Patent number: 8929430
    Abstract: In one embodiment, a method receives a pulse width modulation signal. A value that is a function of the pulse width modulation signal is determined. The value is used to modulate a switching frequency of the pulse width modulation signal to generate a modulated pulse width modulation signal. The applied value reduces electro-magnetic interference from tones in the modulated pulse width modulation signal.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: January 6, 2015
    Assignee: Marvell World Trade Ltd.
    Inventor: Kapil Jain
  • 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: 8837641
    Abstract: The present invention provides a digital broadcast receiver which reduces the time needed for channel scans by performing efficient channel scanning when broadcasts in a plurality of broadcast protocols are received. As a first phase channel scan, a first controller and a second controller divide a plurality of channels included in an overlapping frequency band of a first broadcast protocol and a second broadcast protocol, and execute parallel channel scans. After the first phase channel scan, the first controller scans channels in which electrical signals generated from electromagnetic waves received by a second tuner in the first phase channel scan could not be demodulated by a second demodulator, and the second controller scans channels in which electrical signals generated from electromagnetic waves received by a first tuner could not be demodulated by a first demodulator.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: September 16, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keiichi Shirasuka, Soichiro Matsumoto
  • Patent number: 8811467
    Abstract: A finite sequence of code values is formed, and can be used for example in communications or remote sensing. A code value in said finite sequence of code values has a validity period specific to that code value. There are code values of different validity periods in said finite sequence of code values. Each of said validity periods is longer than or equal to a predetermined minimum baud length.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: August 19, 2014
    Assignee: Fracticode Ltd.
    Inventor: Juha Vierinen
  • Patent number: 8798125
    Abstract: The present invention includes a method of determining a phase estimate for an input signal having pilot symbols. The method includes receiving a plurality of pilot symbols, and then multiplying two or more pilot symbol slots by corresponding correlator coefficients to correct a phase estimate of the input signal.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: August 5, 2014
    Assignee: Broadcom Corporation
    Inventors: Tommy Yu, Amy Gayle Hundhausen
  • Patent number: 8791842
    Abstract: Embodiments of the present invention disclose a data decoding method and apparatus, relate to the field of wireless communications, and can improve a resource utilization rate in a decoding process, thereby improving decoding efficiency. The method of the present invention includes: dividing a to-be-decoded data transport block into N code blocks, where N is an integer greater than or equal to 2; and decoding the N code blocks in parallel according to a reverse direction of encoding. The present invention is applicable to data decoding.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: July 29, 2014
    Assignee: Huawel Technologies Co., Ltd.
    Inventors: Yafan Zhang, Jiaji Zhang
  • Patent number: 8774312
    Abstract: The invention relates to a method for the scalable improvement of the quality of an encoding method according to IT-U Recommendation G.722, including the following steps: —a digital error signal (E) derived from an input signal to be encoded and a prognosis signal is compared in sections to a number of M*LN different reference signals in an iterative process having a number of repeated steps depending on the scope of the expansion, and the reference signal having a minimum error signal of a prescribed error criteria is derived therefrom, —the reference signals are each made up of equidistant Dirac impulses ?(n) according to (I), wherein off=[0 . . . M?1], indicates the distance of the first impulse from a zero time point, ??{?, ?, . . . , ?} indicates the amplitude value, M the distance between the individual pulses, N the number of pulses, and L the number of different levels, —the information about the reference signal having the minimum error signal is transmitted.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: July 8, 2014
    Assignee: Siemens Enterprise Communications GmbH & Co. KG
    Inventors: Stefan Schandl, Panji Setiawan
  • Patent number: 8718201
    Abstract: Techniques are provided for a demodulation and decoding method and apparatus for a given user equipment device to receive a one or more Orthogonal Frequency Division Multiplex (OFDM) symbols over a control channel, where the OFDM symbols comprise a plurality of resource element groups distributed in time and frequency that are combined to form control channel elements. Those resource element groups that form specific control channel elements for the user equipment device and those resource element groups that form common control channel elements for one or more user equipment devices including the given user equipment device are identified. The resource element groups that form the specific control channel elements and the resource element groups that form the common control channel elements are demodulated to generate encoded control messages comprising one or more control channel elements.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: May 6, 2014
    Assignees: MStar Semiconductor, Inc., MStar Software R&D (Shenzhen) Ltd., MStar France SAS, MStar Semiconductor, Inc.
    Inventors: Richard A. Lane, Mark B. Murphy, Cyril Valadon
  • Patent number: 8705635
    Abstract: A system, medium, and method compressing and/or restoring images. Such a data compression method may include selecting a mode from among a plurality of modes for compressing current data, according to predetermined criteria, and calculating a difference between the current data and reference data, according to the selected mode, and compressing the current data, or truncating a part of the current data and compressing the current data. Accordingly, it is possible to significantly lower the complexity of an image encoder/decoder system and exactly meet a picture-based CBR required by LCD DCC devices/systems.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: April 22, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-jo Lee, Si-hwa Lee, Do-hyung Kim
  • Patent number: 8705633
    Abstract: A video transport system is provided for transporting as 8B/10B coded video stream across a 64B/66B coded link, wherein forward error correction is provided without the overhead of the prior art. The system also provides a system with the ability to recover 64B/66B Encoded blocks that have corrupt Sync bits.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: April 22, 2014
    Assignee: Omron Management Center of America, Inc.
    Inventor: Kenneth R. Herrity
  • Patent number: 8675798
    Abstract: Systems, methods, and circuits provide phase inversion of a clock signal. A first clock signal is received. A phase inversion signal indicates the existence of a 180 degree phase difference between the first clock signal and a second clock signal. As a result of the phase inversion signal indicating the 180 degree phase difference, the system, methods and circuits adapt the first clock signal by extending the first clock signal by a phase such that the first clock signal's rising edges and falling edges align with the second clock signal's rising edges and falling edges. As a result, the 180 degree phase difference between the clock signals is eliminated.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: March 18, 2014
    Assignee: NetLogic Microsystems, Inc.
    Inventor: Dimitri Argyres
  • Patent number: 8665996
    Abstract: A configurable decoder within a receiver (for example, within a wireless communication device) includes numerous decoders. In one mode, the multiple decoders are used to decode different sub-packets of a packet. When one decoder completes decoding the last sub-packet assigned to it of the packet, then that decoder generates a packet done indication. A control circuit receives the packet done indications, and when all the decoders have generated packet done indications then the control circuit initiates an action. In one example, the action is the interrupting of a processor. The processor responds by reading status information from the control circuit, thereby resetting the interrupt. End-of-packet markers are usable to generate packet done indications and to generate EOP interrupts. Similarly, end-of-group markers are usable to generate group done indications and to generate EOG interrupts. The decoder block is configurable to process sub-packets of a packet using either one or multiple decoders.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: March 4, 2014
    Assignee: Qualcomm Incorporated
    Inventors: Joseph Zanotelli, Mrinal Mahesh Nath, Arunava Chaudhuri, Kaushik Ghosh, Raghu Challa, Weihong Jing
  • Patent number: 8599727
    Abstract: A method for transmitting information data by using a Reed-Muller coding scheme in a wireless communication system is disclosed. The method includes the steps of configuring a number of resource elements for transmitting the information data; dividing the information data to first information data and second information data if a bit size O of the information data is equal to or larger than a predetermined number; applying RM coding on each of the first information data and the second information data; concatenating the coded first information data and the coded second information data, and transmitting the concatenated data by using the predetermined number of resource elements, wherein a minimum value Q?min for the number of resource elements is defined by a sum of a minimum value Q?min—1 for the number of resource elements corresponding to the first information data and a minimum value Q?min—2 for the number of resource elements corresponding to the second information data.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: December 3, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jiwoong Jang, Moonil Lee, Jaehoon Chung, Seunghee Han, Hyunsoo Ko
  • 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: 8594174
    Abstract: A driver for driving an LED uses PWM in a sequence of the periods. The driver has a modulo counter, that is reset after each period. The driver has a first adder for combining the count value with a quantity indicative of a shift of the LED's control pulse relative to the start of the period; a second adder for combining the count value with a width quantity indicative of a width of the control pulse; and a logic gate receiving the MSBs at the outputs of the adders and supplying the control pulse.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: November 26, 2013
    Assignee: NXP B.V.
    Inventors: Peter Hubertus Franciscus Deurenberg, Joannes Wilhemus Gertrudis Marie Jacobs
  • Patent number: 8582682
    Abstract: Disclosed is a digital broadcasting transmission/reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TS stream generator for inputting robust and normal packets having stuff bytes in predetermined positions and generating dual TS stream by inserting the robust packets between the normal packets; a randomizer for randomizing the dual TS stream; a stuff byte exchanger for replacing the stuff bytes of a randomized data streams from the randomizer to a predetermined known data; and an encoder for encoding a data streams to which the known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization, so that the digital broadcasting reception performance can be improved at poor multipath channels.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: November 12, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-deok Chang, Hae-joo Jeong, Joon-soo Kim
  • Patent number: 8565354
    Abstract: Disclosed is a digital broadcasting transmission/reception system having an improved reception performance and in a signal-processing method thereof. A digital broadcasting transmitter comprises a TS stream generator for inputting robust and normal packets having stuff bytes in predetermined positions and generating dual TS stream by inserting the robust packets between the normal packets; a randomizer for randomizing the dual TS stream; a stuff byte exchanger for replacing the stuff bytes of a randomized data streams from the randomizer to a predetermined known data; and an encoder for encoding a data streams to which the known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization, so that the digital broadcasting reception performance can be improved at poor multipath channels.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: October 22, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-deok Chang, Hae-joo Jeong, Joon-soo Kim
  • Patent number: 8553785
    Abstract: An apparatus and method for transmitting and recovering encoded data streams across Physical Medium Attachments (PMA) are provided. The data stream includes a plurality of data blocks. The method of transmitting includes tagging at least some of the plurality of data blocks in the data stream. The method also includes splitting the data stream into first and second lanes of data blocks. The method further includes transmitting the first lane of data blocks to a first PMA and the second lane of data blocks to a second PMA.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: October 8, 2013
    Assignee: STMicroelectronics, Inc.
    Inventor: Michele Chiabrera
  • Patent number: 8553757
    Abstract: A “Media Transmission Optimizer” provides a media transmission optimization framework for lossy or bursty networks such as the Internet. This optimization framework provides a novel form of dynamic Forward Error Correction (FEC) that focuses on the perceived quality of a recovered media signal rather than on the absolute accuracy of the recovered media signal. In general, the Media Transmission Optimizer provides an encoder that optimizes the transmission of redundant frames of electronic media information encoded at different bit rates, and provides optimized playback quality by providing a decoder that automatically selects an optimal path through one or more available representations of each frame as a function of overall rate/distortion criteria.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: October 8, 2013
    Assignee: Microsoft Corporation
    Inventors: Dinei A. Florencio, Philip A. Chou, Suleyman Serdar Kozat
  • Patent number: 8542780
    Abstract: Disclosed is a digital broadcasting transmission/reception system having an improved reception performance and in a signal-processing method thereof. A digital broadcasting transmitter comprises a TS stream generator for inputting robust and normal packets having stuff bytes in predetermined positions and generating dual TS stream by inserting the robust packets between the normal packets; a randomizer for randomizing the dual TS stream; a stuff byte exchanger for replacing the stuff bytes of a randomized data streams from the randomizer to a predetermined known data; and an encoder for encoding a data streams to which the known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization, so that the digital broadcasting reception performance can be improved at poor multipath channels.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: September 24, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-deok Chang, Hae-joo Jeong, Joon-soo Kim
  • Patent number: 8532220
    Abstract: Methods and apparatus are provided for secure distribution and storage of data using N channels. An input data sequence, X, is distributed using a plurality, N, of channels. In one embodiment, the input data sequence, X, is split into N subsequences; and the N subsequences are encoded into N bit streams using a set of Slepian-Wolf codes with N separate encoders and a joint decoder. The Slepian-Wolf codes can be selected to ensure a computational complexity to obtain a portion of the input data sequence grows exponentially with respect to a length of the input data sequence unless all of the N bit streams are compromised. In another embodiment, the input data sequence, X, is compressed using a lossless data compressing techniques; and the compressed input data sequence is split into N subsequences that are distributed.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: September 10, 2013
    Assignee: International Business Machines Corporation
    Inventors: Ligang Lu, Ashish Jagmohan, Dake He
  • Patent number: 8532200
    Abstract: A system includes a side band transmission module configured to combine side band data with a clock signal to generate a modified clock signal. The system also includes a serializer configured to provide a waveform corresponding to serialized input data. The modified clock signal adjusts at least one of a leading edge or a falling edge of N half cycles of the waveform based on the side band data to form a modified waveform. The serializer is configured to output the modified waveform. N is greater than or equal to 1.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: September 10, 2013
    Assignee: Marvell International Ltd.
    Inventors: Gang Wang, Wei Zhou, Chee Hoe Chu, Po-Chien Chang
  • Patent number: 8514981
    Abstract: Disclosed is a digital broadcasting transmission/reception system having an improved reception performance and in a signal-processing method thereof. A digital broadcasting transmitter comprises a TS stream generator for inputting robust and normal packets having stuff bytes in predetermined positions and generating dual TS stream by inserting the robust packets between the normal packets; a randomizer for randomizing the dual TS stream; a stuff byte exchanger for replacing the stuff bytes of a randomized data streams from the randomizer to a predetermined known data; and an encoder for encoding a data streams to which the known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization, so that the digital broadcasting reception performance can be improved at poor multipath channels.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: August 20, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-deok Chang, Hae-joo Jeong, Joon-soo Kim
  • Patent number: 8503594
    Abstract: The present invention includes a method of determining a phase estimate for an input signal having pilot symbols. The method includes receiving a plurality of pilot symbols, and then multiplying two or more pilot symbol slots by corresponding correlator coefficients to correct a phase estimate of the input signal.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: August 6, 2013
    Assignee: Broadcom Corporation
    Inventors: Tommy Yu, Amy Gayle Hundhausen
  • Patent number: 8483303
    Abstract: Disclosed is a digital broadcasting transmission/reception system having an improved reception performance and in a signal-processing method thereof. A digital broadcasting transmitter comprises a TS stream generator for inputting robust and normal packets having stuff bytes in predetermined positions and generating dual TS stream by inserting the robust packets between the normal packets; a randomizer for randomizing the dual TS stream; a stuff byte exchanger for replacing the stuff bytes of a randomized data streams from the randomizer to a predetermined known data; and an encoder for encoding a data streams to which the known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization, so that the digital broadcasting reception performance can be improved at poor multipath channels.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: July 9, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-deok Chang, Hae-joo Jeong, Joon-soo Kim
  • Patent number: 8464081
    Abstract: A system and method for communicating information using Layer 1 from a powered device to power source equipment via Ethernet. In one embodiment, Layer 1 information such as power management, classification, temperature, and disconnect information is transmitted from a powered device to power source equipment using an AC signal that has a cycle defining a first time period during which the AC signal is turned on and a second time period during which the AC signal is turned off. A type of information being sent by the powered device can be determined based on characteristic on/off times of the AC signal cycle.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: June 11, 2013
    Assignee: Broadcom Corporation
    Inventors: Asif Hussain, Manisha Pandya
  • Patent number: 8401136
    Abstract: Disclosed is a semiconductor integrated circuit for generating a frequency division clock signal that approximates a desired clock signal without increasing a size thereof. The semiconductor integrated circuit masks, for each programmable cycle, a clock signal to be supplied to a transmission clock generation unit 100, thereby delaying a counting operation of a clock counter 101, and setting a timing for extending a transmission clock signal so as to cause a transmission rate of an average frequency of the transmission clock signal to approximate a predetermined transmission rate, wherein the transmission clock generation unit 100 divides a frequency of a clock source signal S301 that is a high-speed clock signal.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: March 19, 2013
    Assignee: Panasonic Corporation
    Inventors: Yoshiaki Fujiwara, Toshio Takita
  • Patent number: 8369470
    Abstract: Methods and apparatus are provided for adapting one or more equalization parameters in a communications system by reducing group delay spread. According to one aspect of the invention, one or more equalization parameters in a communications system are adapted by detecting one or more predefined run length patterns in a received signal, such as a plurality of consecutive same-valued bits; evaluating a transition latch value for each of the detected predefined run length patterns, wherein the transition latch value provides an indication of whether the received signal is under-equalized or over-equalized; and adjusting the one or more equalization parameters of the communications system based on the evaluation of the transition latch value. The adjusted equalization parameters may be employed to equalize intersymbol interference. A data eye monitor can be employed to evaluate the transition latch value.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: February 5, 2013
    Assignee: Agere Systems, LLC
    Inventors: Mohammad S. Mobin, Kenneth W. Paist, Lane A. Smith
  • Publication number: 20130010879
    Abstract: A channel coding method of variable length information using block code is disclosed. A method for channel-coding information bits using a code generation matrix including 32 rows and A columns corresponding to length of the information bits includes channel-coding the information bits having “A” length using basis sequences having 32-bit length corresponding to columns of the code generation matrix, and outputting the channel-coded result as an output sequence. If “A” is higher than 10, the code generation matrix is generated when (A-10) additional basis sequences were added as column-directional sequences to a first or second matrix. The first matrix is a TFCI code generation matrix composed of 32 rows and 10 columns used for TFCI coding. The second matrix is made when at least an inter-row location or an inter-column location of the first matrix was changed. The additional basis sequences satisfy a value 10 of minimum Hamming distance.
    Type: Application
    Filed: September 6, 2012
    Publication date: January 10, 2013
    Applicant: LG ELECTRONICS INC.
    Inventors: Dong Wook ROH, Joon Kui AHN, Nam Yul YU, Jung Hyun CHO, Yu Jin NOH, Ki Jun KIM, Dae Won LEE
  • Patent number: 8265217
    Abstract: The present invention includes a method of determining a phase estimate for an input signal having pilot symbols. The method includes receiving a plurality of pilot symbols, and then multiplying two or more pilot symbol slots by corresponding correlator coefficients to correct a phase estimate of the input signal.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: September 11, 2012
    Assignee: Broadcom Corporation
    Inventors: Tommy Yu, Amy Gayle Hundhausen
  • Patent number: 8254435
    Abstract: A variable delay circuit delays a carrier signal having a predetermined frequency, and outputs a modulated signal. A delay setting unit sets a delay period for the variable delay circuit according to a data signal to be modulated. The delay setting unit assigns each symbol in the data signal to any one of positive edges and negative edges in the carrier signal, and sets a delay period for the variable delay circuit at the timing at which a positive edge in the carrier signal passes through the variable delay circuit, according to the symbol value in the data signal assigned to the positive edge. Furthermore, the delay setting unit sets a delay period for the variable delay circuit at the timing at which a negative edge in the carrier signal passes through the variable delay circuit, according to the symbol value in the data signal assigned to the negative edge.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: August 28, 2012
    Assignee: Advantest Corporation
    Inventor: Shoji Kojima
  • Publication number: 20120027104
    Abstract: A method for transmitting data over a single-wire bus wherein a first communication channel is defined by pulses of different durations according to the state of the transmitted bit and depending on a reference duration, and a second communication channel is defined by the reference duration.
    Type: Application
    Filed: July 25, 2011
    Publication date: February 2, 2012
    Applicant: STMicroelectronics (Rousset) SAS
    Inventors: Gilles Bas, Hervé Chalopin, François Tailliet
  • Patent number: 8098735
    Abstract: A circuit generally having a first module, a second module and a third module is disclosed. The first module may be configured to (i) generate a plurality of parsed residual blocks by parsing an 8×8 CABAC (context-based adaptive binary arithmetic coding) residual block received in an input signal and (ii) generate a plurality of metric signals resulting from the parsing of the 8×8 CABAC residual block. The second module may be configured to generate a scanning position signal based on the metric signals. The third module may be configured to generating a plurality of 4×4 CAVLC (context-based adaptive variable length coding) residual blocks in an output signal by sub-sampling the parsed residual blocks based on the scanning position signal.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: January 17, 2012
    Assignee: LSI Corporation
    Inventors: Jamal Benzreba, Harminder Banwait, Eric Pearson
  • Patent number: 8050334
    Abstract: According to the present invention, a shift amount Sj?1 of the previous frame is held in a shift amount buffer of an integer signal coder. At least as many last sample values in the previous frame as the number of an order P used in linear predictive analysis are held in a sample buffer of the integer signal coder. The last P sample values in the previous frame held in the sample buffer of the integer signal coder are corrected in an interframe correction section by Sj-Sj?1 on the basis of the shift amount Sj of the current frame and the shift amount Sj?1 of the previous frame determined by a shift amount determining section.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: November 1, 2011
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Noboru Harada, Takehiro Moriya
  • Patent number: 8023570
    Abstract: A powerful new class of methods for encoding digital data for reliable transmission over unreliable communication channels is described. With this method, the message bits are divided into multiple submessages and the bits in each layer are encoded using a standard error correction code to provide a plurality of subcodewords. A first linear transformation is applied to each of the subcodewords. The so-transformed subcodewords from the different submessages are then combined to form a first redundancy block to be transmitted. Additional redundancy blocks are generated by repeating this process on the same message but with jointly related nonidentical sets of linear transformations. The result is a set of codewords for each message which are then used to generate a transmitted waveform in one of several different ways, depending upon the application.
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: September 20, 2011
    Assignee: Massachusetts Institute of Technology
    Inventors: Gregory W. Wornell, Mitchell Trott, Uri Erez
  • Patent number: 8018967
    Abstract: A data transfer apparatus includes a data accumulation unit to accumulate data to be transferred, an encoding matrix storage unit to store an encoding matrix for encoding data of each of a plurality of data sizes, an encoding size determination unit to determine a block of data to be transmitted in descending order of data size based on the data sizes of the data accumulated in the encoding matrix storage unit, an encoding unit to acquire an encoding matrix corresponding to the data size of the determined block form the encoding size determination unit and encode data accumulated in the data accumulation unit for each block using the acquired encoding matrix, a packet generation unit to generate a packet by adding encoding information about the encoding matrix used for encoding the encoded data, and a transmission unit to transmit the generated packet.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: September 13, 2011
    Assignee: Fujitsu Limited
    Inventors: Hiroaki Kameyama, Akihisa Shouen
  • Patent number: 8014453
    Abstract: A method, a codebook, and a Base Station (BS) for precoding are provided. The precoding method includes: obtaining a total uplink power of a User Equipment (UE); if the total uplink power is greater than ¾ of a rated total transmit power of antennas, selecting a codeword from a first codebook with imbalanced power between layers; otherwise, selecting a codeword from the first codebook and a second codebook with balanced power between layers, so as for precoding data to be transmitted according to the selected codeword. Thus, a loss of an antenna performance at a high signal-to-noise ratio is reduced, and the loss of the power amplification of the antenna is reduced if the transmit power of the antenna is restricted.
    Type: Grant
    Filed: December 31, 2010
    Date of Patent: September 6, 2011
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yongxing Zhou, Qiang Wu
  • Patent number: 8010878
    Abstract: In variable rate data transmission, a data transmission method or the like is provided which enables adjustment for achieving desired erroneous rate detection. A transmitting side places a calculated error detecting code after the transmission data in each frame, generates frame data in which an R-bit series before the final bit position of the error detecting code is rearranged in inverse order, and transmits. A receiving side assumes the transmission data and error detecting code by assuming the final bit position of the frame data in each frame, conducting the assumption presuming that the rearrangement in inverse order has occurred on the transmitting side. Among the assumed final bit positions, the position determined to be errorless as a result of the error detection based on the assumed transmission data and error detecting code is determined as the final bit position. R can be greater or less than the number of bits of the error detecting code.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: August 30, 2011
    Assignee: NTT DoCoMo, Inc.
    Inventor: Yukihiko Okumura
  • Patent number: 7929646
    Abstract: A MAP decoder, or a turbo decoder having constituted MAP decoders, is configured with bi-directional sliding windows. A sliding window architecture is applied to the forward state metric (FSM) calculation of an encoded data block having a trellis with N time-steps. The data block is divided into smaller sub-blocks and a forward recursion of two or more of the sub-blocks are performed in parallel to obtain FSMs. Each sub-block overlaps with a previous sub-block by k time-steps, where k is an integer value greater than zero. This provides a good approximation of the FSMs at time-step k+t of the sub-block. The FSMs associated with the first k time steps of each sub-block, other than the first sub-block, are discarded. A reverse recursion of each sub-block is also performed to obtain reverse state metrics (RSM) for the sub-block. Likelihood ratios are then calculated based on the FSMs and RSMs.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: April 19, 2011
    Assignee: Qualcomm Incorporated
    Inventors: Pei Chen, Ivan Jesus Fernandez-Corbaton, Jordi de los Pinos Pont
  • Patent number: 7903745
    Abstract: A method of encoding, transmitting and decoding data over a wireless medium, including, selecting a number of bits N representing a symbol, creating a set of at least 2 to the power of N equal sized codewords with a larger number of bits than N, representing the 2 to the power of N possible combinations of N bit symbols, receiving a stream of data, replacing every N bit symbol from the stream of data with its representative codeword from the created set, transmitting the codewords using a faster transmission bit rate such that the transmission time allocated for each codeword is substantially the same as the time duration required to transmit the original bits it replaced.
    Type: Grant
    Filed: November 24, 2005
    Date of Patent: March 8, 2011
    Assignee: Infra-Com Ltd.
    Inventors: Tamir Shaanan, Lev Freilicher
  • Patent number: 7898444
    Abstract: A decoding method comprising the following steps is provided. The mth lookup index for a new lookup table is obtained according to the number of leading 1's in the bit stream. The nth base Huffman code in a simplified Huffman table is obtained according to the mth lookup index. The (n+1) most significant bits (MSB) are obtained from the bit stream according to the nth base Huffman code. A difference is generated according to the (n+1) MSBs in the bit stream and the nth base Huffman code. Whether the difference is less than 0 is checked. If yes, a symbol index is generated according to the difference and the nth base symbol index, and a symbol is obtained according to the symbol index. If no, n is decreased or increased by 1 according to the method being used, and the data in the simplified Huffman table is compared continually.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: March 1, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Wen-Shan Wang, Po-Wen Cheng
  • Patent number: RE44013
    Abstract: A digital sum variation (DSV) computation method and system is proposed, which is capable of determining the DSV value of a bit stream of channel-bit symbols to thereby find the optimal merge-bit symbol for insertion between each succeeding pair of the channel-bit symbols. This DSV computation method and system is characterized in the use of a Zero Digital Sum Variation (ZDSV) principle to determine the DSV. This DSV computation method and system can find the optimal merge-bit symbol for insertion between each succeeding pair of the channel-bit symbols in a more cost-effective manner with the need for a reduced amount of memory and utilizes a lookup table requiring a reduced amount of memory space for storage so that memory space can be reduced as compared to the prior art. This DSV computation method and system is therefore more advantageous to use than the prior art.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: February 19, 2013
    Assignee: Mediatek Inc.
    Inventors: Wen-Yi Wu, Jyh-Shin Pan