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    • 2. 发明专利
    • 受信装置、受信方法、およびそのプログラム
    • 接收设备,接收方法及其程序
    • JP2014225781A
    • 2014-12-04
    • JP2013104104
    • 2013-05-16
    • 日本電信電話株式会社Nippon Telegr & Teleph Corp
    • GABRIELE PABLO NAVASHIRAKI YOSHIFUMIKAMAMOTO MASARUSATO TAKASHIHARADA NOBORUMORIYA TAKEHIRO
    • H04B10/116H04N5/225
    • 【課題】イメージセンサで撮影した画像の解像度が低い場合であっても、復号誤差を小さくできる受信装置、受信方法、及びそのプログラムを提供する。【解決手段】受信装置は、送信装置と可視光通信をする。受信装置は、Mを2以上の整数とし、送信装置のM個の可視光源から出力された光をイメージセンサにより電気信号に変換して得られる画像に含まれる複数の画素をそれぞれM個の可視光源に対応するM個のクラスタに分類する画像処理部と、M個のクラスタの各々のエネルギーに基づいて、M個の可視光源から出力された光に対応する信号を復号する復号部と、を含み、画像処理部は、M個のクラスタの各々について、所定フレーム数の前記複数の画像の各々について計算される当該クラスタのエネルギーの分散が最大になるように、複数の画素をそれぞれM個のクラスタに分類する。【選択図】図3
    • 要解决的问题:提供即使图像传感器拍摄的图像的分辨率低也可以使解码误差较小的接收装置,接收方法及其程序。解决方案:接收装置执行与 发送装置。 接收装置包括:图像处理单元,将通过将从发送装置的M个可见光源输出的光转换为电信号的图像获得的图像中包含的多个像素分类为与M个可见光对应的M个簇 源分别为M为2以上的整数, 以及解码单元,其基于M个簇的每个能量来解码与从M个可见光源输出的光相对应的信号。 图像处理单元分别将多个像素分类为M个群集,使得对于M个群集中的每一个,针对与预定帧号对应的多个图像中的每一个图像计算出的群集的能量方差为最大。
    • 4. 发明专利
    • Bidirectional predictive coding device and method, bidirectional predictive decoding device and method, and program and recording medium therefor
    • 双向预测编码装置和方法,双向预测解码装置及方法及其程序和记录介质
    • JP2010276848A
    • 2010-12-09
    • JP2009129175
    • 2009-05-28
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社
    • MORIYA TAKEHIROHARADA NOBORUKAMAMOTO MASARU
    • G10L19/00G10L19/14H03M7/30
    • PROBLEM TO BE SOLVED: To provide a predictive coding device etc. capable of improving efficiency of coding of a sound signal, in particular, the efficiency of coding when a frame length is short. SOLUTION: A prediction coefficient calculating section 120 performs linear predictive analysis on an input signal constituted of sample columns of time series by a frame unit constituted of a plurality of samples, to calculate a prediction coefficient, and a prediction coefficient coding section 130 encodes the prediction coefficient to output a prediction coefficient code. A linear prediction section 140, to which the input signal and the prediction coefficient corresponding to the prediction coefficient code are input, selects one of prediction direction of a forward direction or the reverse direction in terms of time within the frame, and outputs a prediction error column calculated by the prediction coefficient corresponding to the input signal and the prediction coefficient code by predicting the selected prediction direction, and information indicating the selected prediction direction. A prediction error encoding section 150 encodes the prediction error column and outputs the prediction error code column. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供能够提高声音信号的编码效率的预测编码装置等,特别是当帧长度短时编码的效率。 解决方案:预测系数计算部分120对由多个采样构成的帧单元的时间序列采样列构成的输入信号进行线性预测分析,以计算预测系数,以及预测系数编码部分130 对预测系数进行编码,输出预测系数码。 输入与预测系数码对应的输入信号和预测系数的线性预测单元140根据帧内的时间选择正向或反方向的预测方向之一,并输出预测误差 通过预测所选择的预测方向由与输入信号对应的预测系数和预测系数码计算出的列,以及指示所选择的预测方向的信息。 预测误差编码部分150对预测误差列进行编码并输出预测误差代码列。 版权所有(C)2011,JPO&INPIT
    • 5. 发明专利
    • Coding method, coding device, decoding method, decoding device, program and recording medium
    • 编码方法,编码装置,解码方法,解码装置,程序和记录介质
    • JP2010191154A
    • 2010-09-02
    • JP2009035015
    • 2009-02-18
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社
    • HARADA NOBORUKAMAMOTO MASARUMORIYA TAKEHIRO
    • G10L19/00H03M7/30H03M7/36
    • PROBLEM TO BE SOLVED: To perform high compression-lossless coding of a sound signal which is coded by a coding system in which two minimum quantized interval exist and a unique code word is given for each interval. SOLUTION: A code word is obtained by coding the sound signal by the coding system in which two minimum quantized interval exist and the unique code word is given for each interval, and the code word is input. For each frame composed of the input code word of a plurality of samples, regarding a frame in which other than two kinds of code words is not included for each of two minimum quantization intervals, a sequence of frequency cycles in which two kinds of code words alternately continue is obtained, and a code corresponding to the sequence of the obtained continued frequency cycles is output. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:对由存在两个最小量化间隔的编码系统编码的声音信号进行高压缩无损编码,并且为每个间隔给出唯一码字。 解决方案:通过对存在两个最小量化间隔的编码系统对每个间隔给出唯一码字的编码系统对声音信号进行编码,并输入码字,从而获得码字。 对于由多个样本的输入码字组成的每个帧,关于两个最小量化间隔中的每一个不包括两种码字以外的帧的帧,其中两种码字的频率序列 交替地继续,并且输出与所获得的连续频率周期的序列相对应的代码。 版权所有(C)2010,JPO&INPIT
    • 7. 发明专利
    • Signal encoding apparatus, decoding apparatus, method, program, and recording medium
    • 信号编码装置,解码装置,方法,程序和记录介质
    • JP2009225466A
    • 2009-10-01
    • JP2009141575
    • 2009-06-12
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社
    • HARADA NOBORUMORIYA TAKEHIRO
    • H03M7/20
    • PROBLEM TO BE SOLVED: To solve the problem that, in the prior arts, compression efficiency is not always high since low-order bits, without information substantially, are also encoded.
      SOLUTION: When encoding an integer signal, a digit, in a frame, where all bits are 0 or some bits are 1, is detected and the digit where some bits are 1, is encoded. Furthermore, when decoding an integer signal, information about the digit, in the frame, where all the bits are 0 or some bits are 1, is received, the integer signal is decoded and the digit information is used to add the digit, where all the bits are 0, to the decoded integer signal, thereby determining the integer signal. Moreover, when a detection result of the preceding frame is different from a detection result of the current frame, while considering detection results in the past, frequent shift amount variation is suppressed. Otherwise, linear predictive encoding is performed while also taking the preceding shift amount into account.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 解决的问题为了解决现有技术中压缩效率并不总是很高的问题,因为没有信息的低位也被编码。 解决方案:当对整数信号进行编码时,检测到所有位为0或某些位为1的帧中的数字,并对其中某些位为1的数字进行编码。 此外,当解码整数信号时,接收到所有位为0或某些位为1的帧中的数字的信息,整数信号被解码,数字信息用于添加数字,其中全部 比特为0,解码的整数信号,从而确定整数信号。 此外,当前一帧的检测结果与当前帧的检测结果不同时,在考虑过去的检测结果的同时,抑制频移移位量变化。 否则,还执行线性预测编码,同时考虑到前述移位量。 版权所有(C)2010,JPO&INPIT
    • 10. 发明专利
    • Method of calculating parcor coefficient, and its device, its program and its recording medium
    • 计算分数系数的方法及其装置,其程序及其记录介质
    • JP2008185701A
    • 2008-08-14
    • JP2007017921
    • 2007-01-29
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社
    • MORIYA TAKEHIROHARADA NOBORUKAMAMOTO MASARU
    • G10L11/00G10L19/06
    • PROBLEM TO BE SOLVED: To provide a method of calculating PARCOR coefficient in which a PARCOR coefficient is obtained, not from relation of minimizing an average output P
      m , but from reference for minimizing absolute values of amplitudes of a forward prediction error and a backward prediction error.
      SOLUTION: A device of calculation PARCOR coefficient for obtaining the PARCOR coefficient by increasing sequence orders, comprises: a weighting coefficient creation section for creating a weighting coefficient which suppresses more, as the amplitudes of the forward prediction error and the backward prediction error become larger; an inner product calculation section which calculates an inner product value of a forward prediction sample and a backward prediction sample, and which multiplies the weighting coefficient by the inner product value; an energy calculation section for multiplying each of energy values of the forward prediction error sample and the backward prediction error sample, by the weighting coefficient; and a dividing section for calculating the PARCOR coefficient by dividing the inner product value by which the weighting coefficient is multiplied, by a mean value of the energy value by which the weighting coefficient is multiplied.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种计算获得PARCOR系数的PARCOR系数的方法,而不是根据使平均输出P m 最小化的关系,而是从用于最小化绝对值的参考 正向预测误差的幅度和反向预测误差。 解决方案:通过增加序列顺序来获得PARCOR系数的计算PARCOR系数的装置包括:加权系数创建部分,用于创建抑制更多的加权系数作为正向预测误差和后向预测误差的幅度 变大 内积计算部,其计算正向预测样本和后向预测样本的内积值,并将所述加权系数乘以所述内积值; 能量计算部分,用于将前向预测误差样本和后向预测误差样本的每个能量值乘以加权系数; 以及分割部,其通过将加权系数相乘的内积值除以加权系数相乘的能量值的平均值来计算PARCOR系数。 版权所有(C)2008,JPO&INPIT