利索-全球专利检索

  1. Login
  2. Sign Up

Search Results

358 records (took 0.02 seconds)

    SYMBOL SYNCHRONIZATION METHOD AND APPARATUS
    3.
    发明公开
    SYMBOL SYNCHRONIZATION METHOD AND APPARATUS 有权

    公开(公告)号：EP3285448A4

    公开(公告)日：2018-04-25

    申请号：EP15891500

    申请日：2015-05-12

    Applicant: HUAWEI TECH CO LTD

    Inventor： LI XIAODONG ,  LIU QIAO

    IPC: H04L7/02 ,  H04L27/00

    CPC classification number: H04L27/2665 ,  H04L7/0029 ,  H04L27/00 ,  H04L27/0014 ,  H04L2027/0069

    Abstract: The present invention provides a symbol synchronization method and apparatus. By means of the symbol synchronization method and apparatus, a timing location is adjusted outside an adaptive loop. In addition, the adaptive loop proceeds to according to an original function of the adaptive loop. That is, the timing location is stabilized to an initial symbol-synchronization location, and the timing location is then further corrected and adjusted. Therefore, impact of an error of a timing location on symbol synchronization is eliminated by correcting the timing location, and positioning accuracy of a symbol-synchronization location is improved.

    Clock recovery through digital techniques in a coherent receiver
    5.
    发明授权
    Clock recovery through digital techniques in a coherent receiver 有权
    通过数字技术在相干接收机中进行时钟恢复

    公开(公告)号：EP2615769B1

    公开(公告)日：2018-04-18

    申请号：EP11009862.1

    申请日：2011-12-15

    Applicant: Cisco Technology, Inc.

    Inventor： Fludger, Christopher

    IPC: H04L7/00

    CPC classification number: H04L7/0029 ,  H04B10/616 ,  H04B10/6165

    Abstract: Digital techniques to recover clock in a coherent receiver using intradyne detection are provided. A free running oscillator clocks an analog to digital converter that is used to convert an input analog signal to digital data. The digital data is resampled using a numerically controlled oscillator clock. Phase detection is performed on the digital data after it is resampled to determine any phase offset. The numerically controlled oscillator clock is adjusted based on the phase offset. In addition, the digital data is delayed after the digital resampling operation using a digital delay element. The phase offset is also fed forward to the digital delay element.

    AN APPARATUS FOR SYNCHRONIZING A SAMPLING SIGNAL ON A COMMUNICATION SIGNAL
    6.
    发明公开
    AN APPARATUS FOR SYNCHRONIZING A SAMPLING SIGNAL ON A COMMUNICATION SIGNAL 审中-公开
    用于在通信信号上同步采样信号的装置

    公开(公告)号：EP3158677A1

    公开(公告)日：2017-04-26

    申请号：EP14747327.6

    申请日：2014-07-22

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： STOJANOVIC, Nebojsa

    IPC: H04L7/00 ,  G11B20/10 ,  H03L7/087 ,  H04B10/61

    CPC classification number: H04L7/0008 ,  H03J7/00 ,  H03L7/0807 ,  H03L7/091 ,  H04B10/61 ,  H04L7/0029 ,  H04L7/0335

    Abstract: The invention relates to an apparatus (100) for synchronizing a sampling signal on a communication signal, the communication signal comprising communication symbols, the sampling signal indicating sampling time instants of the communication signal, the apparatus (100) comprising a sampler (101) being configured to sample the communication signal at the sampling time instants indicated by the sampling signal to obtain a sampled communication signal, a filter (103) being configured to filter the sampled communication signal using a first filtering transfer function to obtain a first filtered sampled communication signal, and to filter the sampled communication signal using a second filtering transfer function to obtain a second filtered sampled communication signal, a phase detector (105) being configured to determine a first phase detection signal upon the basis of the first filtered sampled communication signal, and to determine a second phase detection signal upon the basis of the second filtered sampled communication signal, the first phase detection signal indicating a position of a sampling time instant within a communication symbol of the first filtered sampled communication signal, the second phase detection signal indicating a position of a sampling time instant within a communication symbol of the second filtered sampled communication signal, a determiner (107) being configured to determine a first synchronicity measure upon the basis of the first phase detection signal, and to determine a second synchronicity measure upon the basis of the second phase detection signal, the first synchronicity measure and the second synchronicity measure indicating a synchronicity between the sampling signal and the communication signal, and a selector (109) being configured to select the first filtering transfer function or the second filtering transfer function of the filter (103) for filtering the sampled communication signal upon the basis of the first synchronicity measure and the second synchronicity measure for synchronizing the sampling signal on the communication signal.

    Abstract translation: 本发明涉及一种用于同步通信信号上的采样信号的装置（100），所述通信信号包括通信符号，所述采样信号指示所述通信信号的采样时刻，所述装置（100）包括采样器（101） ，被配置为在由采样信号指示的采样时刻对通信信号进行采样以获得采样的通信信号;滤波器（103），被配置为使用第一滤波传递函数对采样的通信信号进行滤波以获得第一滤波采样通信信号 并且使用第二滤波传递函数对采样的通信信号进行滤波以获得第二滤波采样通信信号;相位检测器（105），其被配置为基于第一滤波采样通信信号来确定第一相位检测信号;以及 根据秒确定第二相位检测信号 所述第一相位检测信号指示所述第一滤波采样通信信号的通信符号内的采样时刻的位置，所述第二相位检测信号指示所述第一滤波采样通信信号的通信符号内的采样时刻的位置 第二滤波采样通信信号;确定器（107），被配置为基于第一相位检测信号确定第一同步性度量，并且基于第二相位检测信号确定第二同步性度量，第一同步性度量 并且所述第二同步性度量指示所述采样信号与所述通信信号之间的同步性;以及选择器（109），被配置为选择所述滤波器（103）的所述第一滤波传递函数或所述第二滤波传递函数，以对所述采样通信信号 根据第一次同步性测量 并且第二同步度量用于同步通信信号上的采样信号。

    ADAPTIVE JITTER BUFFER
    7.
    发明公开
    ADAPTIVE JITTER BUFFER 审中-公开
    适应器JITTERPUFFER

    公开(公告)号：EP3047585A1

    公开(公告)日：2016-07-27

    申请号：EP13763112.3

    申请日：2013-09-19

    Applicant: Binauric SE

    Inventor： KRÜGER, Hauke

    IPC: H04J3/06 ,  H04L25/05 ,  H04L7/00 ,  G10L21/04

    CPC classification number: H04L43/087 ,  H04J3/0632 ,  H04L7/0029 ,  H04L25/05 ,  H04L2012/5681 ,  H04M1/2535

    Abstract: The present disclosure relates to an adaptive jitter buffer for buffering audio data received via a network. The adaptive jitter buffer comprises an adaptive audio sample buffer, which comprises an adaptive resampler that receives a number of audio samples of the audio data and that outputs a first number of audio samples, which are resampled from the received number of audio samples according to a resampling factor, an audio sample buffer that buffers audio samples, wherein the outputted first number of audio samples are written to the audio sample buffer during an input access event and a second number of audio samples are read from the audio sample buffer during an output access event, and an audio sample buffer fill quantity controller that controls a fill quantity of the audio sample buffer based on controlling the resampling factor of the adaptive resampler.

    SYSTEM AND METHOD TO DETECT AND COMMUNICATE LOSS AND RETENTION OF SYNCHRONIZATION IN A REAL-TIME DATA TRANSFER SCHEME
    8.
    发明公开
    SYSTEM AND METHOD TO DETECT AND COMMUNICATE LOSS AND RETENTION OF SYNCHRONIZATION IN A REAL-TIME DATA TRANSFER SCHEME 有权
    系统和方法进行检测和丢失及同步潴留实时数据传送方式转让

    公开(公告)号：EP2630743A1

    公开(公告)日：2013-08-28

    申请号：EP11773245.3

    申请日：2011-10-18

    Applicant: ST-Ericsson SA

    Inventor： BALAKRISHNAN, Bipin ,  RADULESCU, Andrei

    IPC: H04L1/00 ,  H04J3/06

    CPC classification number: H04L7/0029 ,  H04L1/0083 ,  H04L1/0091 ,  H04L1/08 ,  H04L1/1678 ,  H04L7/0083 ,  H04L7/10

    Abstract: A system and method are described for correcting for a loss of message boundary in a real-time data transmission over an interconnect between a source node and a destination node in an apparatus. In the apparatus, a destination node received one or more messages, wherein each message includes one or more data frames, and each data frame of each message includes an end-of-message flag and a message sequence number, the end-of-message flag set when the data frame is the last data frame in a particular message, and the message sequence number is different for different messages. A loss of message boundary is determined for a previous message when a new data frame of a new message is received and the new message sequence number of the new data frame is different from the previous message sequence number and a last received data frame did not include a set end-of-message flag. To establish re-synchronization, the destination node transmits a synchronization loss message to the source node, and the destination node receives in reply a status report message, and the destination node can regain synchronization of the last received message data such that a previous message boundary can be determined according to the status report message.

    Nicam audio signal resampler
    9.
    发明公开
    Nicam audio signal resampler 有权
    NICAM-Audiosignal，重采样

    公开(公告)号：EP2442479A1

    公开(公告)日：2012-04-18

    申请号：EP12000165.6

    申请日：2007-01-04

    Applicant: THAT Corporation

    Inventor： Darr, Roger R. ,  Easley, Matthew F. ,  Barnhill, Matthew S.

    IPC: H04L7/00 ,  H03H17/04 ,  H03H17/06

    CPC classification number: G10L19/00 ,  H03H17/0422 ,  H03H17/0628 ,  H04L7/0008 ,  H04L7/0025 ,  H04L7/0029

    Abstract: A phase differential calculator comprises: a first phase accumulator configured to generate information indicative of the phase of a local sample clock at a first resolution; a clock generator configured to generate a generated clock and information indicative of the phase of the generated clock at a second resolution that is lower than the first resolution as a function of a phase comparison and in synchronism with a remote sample clock; and a phase comparator configured to generate the phase comparison based on a phase difference between the information indicative of the phase of the local sample clock and the information indicative of the phase of the generated clock.

    Abstract translation: 相位差计算器包括：第一相位累加器，被配置为以第一分辨率产生指示本地采样时钟的相位的信息; 时钟发生器，被配置为产生生成的时钟和指示所生成的时钟的相位的信息，所述信号是低于作为相位比较的函数的第一分辨率的第二分辨率，并且与远程采样时钟同步; 以及相位比较器，被配置为基于表示本地采样时钟的相位的信息与表示所生成的时钟的相位的信息之间的相位差产生相位比较。

    Sample rate converter for encoded data streams
    10.
    发明公开
    Sample rate converter for encoded data streams 审中-公开
    AbtastratenwandlerfürcodierteDatenströme

    公开(公告)号：EP2355387A1

    公开(公告)日：2011-08-10

    申请号：EP10151843.9

    申请日：2010-01-27

    Applicant: Harman Becker Automotive Systems GmbH

    Inventor： Spielbauer, Georg ,  Doerbecker, Matthias

    IPC: H04J3/06 ,  H04L7/00

    CPC classification number: H04L7/0029 ,  H04J3/0632

    Abstract: A system for converting the sample rate of asynchronous data packets and providing at least one synchronous data stream is disclosed. The system comprises: a sample rate converter configured to asynchronously receive data, the sample rate converter operating in accordance with a conversion ratio controllable by a control signal; a FIFO buffer coupled to the sample rate converter downstream thereof and receiving resampled data therefrom; and a controller unit configured to monitor the fill level of the FIFO buffer and to adjust the control signal such dependent on the fill level.

    Abstract translation: 公开了一种用于转换异步数据包的采样率并提供至少一个同步数据流的系统。 该系统包括：采样速率转换器，被配置为异步接收数据，采样率转换器根据由控制信号控制的转换比操作; FIFO缓冲器，其耦合到其下游的采样率转换器并从其接收重新采样的数据; 以及控制器单元，被配置为监视FIFO缓冲器的填充水平并且调整控制信号，这取决于填充水平。

Patent Agency Ranking