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    • 34. 发明授权
    • Encoding apparatus, decoding apparatus, encoding/decoding apparatus, encoding method and decoding method
    • 编码装置,解码装置,编码/解码装置,编码方法和解码方法
    • US06373408B1
    • 2002-04-16
    • US09547136
    • 2000-04-11
    • Tomohiro KimuraMasayuki YoshidaFumitaka Ono
    • Tomohiro KimuraMasayuki YoshidaFumitaka Ono
    • H03M700
    • H03M7/40H03M7/6011
    • The present invention aims to reduce the code length and time for flushing the code. An encoding apparatus includes a data memory storing information source data, a learning memory storing learning data relating the encoding data, a probability estimation table for outputting an encoding parameter indicated by the learning data, and an encoder outputting the code by implementing an arithmetic encoding based on the encoding data and the encoding parameter. In the above encoding apparatus, according to the present invention, a synchronization detector is provided measuring one of inputting the information source data and outputting the code at a predetermined interval. Further, the encoding apparatus includes a boundary detector detecting a carry boundary value within the effective region at predetermined interval and instructing to truncate a part of the effective region based on the detection result. The encoder truncates one of equally divided upper and lower partial regions of the effective region indicated by the carry detector and updates the effective region.
    • 本发明旨在减少用于刷新代码的代码长度和时间。 编码装置包括存储信息源数据的数据存储器,存储有关编码数据的学习数据的学习存储器,用于输出由学习数据表示的编码参数的概率估计表以及通过实施基于算术编码的代码输出 对编码数据和编码参数。 在上述编码装置中,根据本发明,提供一种测量输入信息源数据并以预定间隔输出代码的同步检测器。 此外,编码装置包括边界检测器,其以预定间隔检测有效区域内的进位边界值,并根据检测结果指示截断有效区域的一部分。 编码器截断由进位检测器指示的有效区域的等分的上部和下部部分区域中的一个,并更新有效区域。
    • 36. 发明授权
    • Adaptive coding method
    • 自适应编码方法
    • US6075471A
    • 2000-06-13
    • US41134
    • 1998-03-12
    • Tomohiro KimuraFumitaka OnoIkuro UenoTaichi YanagiyaMasayuki Yoshida
    • Tomohiro KimuraFumitaka OnoIkuro UenoTaichi YanagiyaMasayuki Yoshida
    • H04N19/00H03M7/30H03M7/40H04N1/413H04N19/423H04N19/91H03M7/00
    • H03M7/4006
    • An adaptive coding method is comprised of: a fourth step (508), (510) for calculating an occurrence frequency of either the more probable symbol (MPS) or the less probable symbol (LPS) with respective to the entered input; a fifth step (511) for comparing an occurrence time accumulated value calculated as the occurrence frequency at the fourth step with a preselected value (threshold value), and for reducing the occurrence time accumulated value by 1/2 in the case that the occurrence time accumulated value reaches the preselected value (threshold value); and a sixth step (513) for defining the more probable symbol (MPS) and the less probable symbol (LPS) in correspondence with a predetermined region on a numerical line with respect to the data signal to thereby output coordinate values on the numerical line as a corded word.
    • 自适应编码方法包括:第四步骤(508),(510),用于相应于输入的输入计算更可能符号(MPS)或较小可能符号(LPS)的出现频率; 第五步骤(511),用于将作为第四步骤的出现频率计算的出现时间累积值与预选值(阈值)进行比较,并且将发生时间累加值减少+ E,将1/2 + EE 发生时间累积值达到预选值(阈值)的情况; 以及第六步骤(513),用于与数据信号上的数字行上的预定区域相对应地定义更可能的符号(MPS)和较少的可能符号(LPS),从而在数字线上输出坐标值作为 一个有用的词
    • 37. 发明授权
    • Method of transmitting orthogonal frequency division multiplex signal,
and transmitter and receiver employed therefor
    • 发送正交频分复用信号的方法及其发射机和接收机
    • US5682376A
    • 1997-10-28
    • US572719
    • 1995-12-14
    • Hiroshi HayashinoYasuo HaradaTomohiro KimuraYasuhiro UnoHiroshi Oue
    • Hiroshi HayashinoYasuo HaradaTomohiro KimuraYasuhiro UnoHiroshi Oue
    • H04L27/26H04J11/00H04L27/28
    • H04L27/2607H04L27/2614
    • A complex multiplier complex-multiplies a carrier modulation signal group for decoding the phases and amplitudes of a plurality of carriers which are orthogonal to each other on the frequency axis by a complex signal group having a predetermined specific pattern which varies in phase at random. An inverse Fourier transformer performs inverse Fourier transformation on an output of the complex multiplier, for transforming a digital signal which is multiplexed on the frequency axis to an OFDM signal on the time axis. A guard interval insertion part adds front and rear guard intervals to front and rear parts of each symbol of the OFDM signal respectively. The front and rear guard intervals include data which are identical to those of rear and front end parts of the corresponding symbol respectively. Arithmetic processing which is reverse to that on a transmission side is performed on a receiving side, whereby distortion of received data is removed. Thus, the OFDM signal can be transmitted with no waveform distortion on a data component of each symbol on the frequency axis after Fourier transformation even if a reflected wave is superposed on a direct wave due to a multipath.
    • 复数乘法器复数乘法载波调制信号组,用于解码在频率轴上彼此正交的多个载波的相位和幅度,具有随机相位变化的预定特定模式的复信号组。 傅里叶逆变换器对复数乘法器的输出执行逆傅立叶变换,用于将在频率轴上复用的数字信号在时间轴上变换为OFDM信号。 保护间隔插入部分分别向OFDM信号的每个符号的前后部分添加前后保护间隔。 前后保护间隔包括与相应符号的后端部分和前端部分相同的数据。 在接收侧执行与发送侧相反的算术处理,从而去除接收数据的失真。 因此,即使由于多径而将反射波叠加在直接波上,也可以在傅立叶变换之后的频率轴上的每个符号的数据分量上不发送波形失真的OFDM信号。
    • 39. 发明授权
    • Coding system
    • 编码系统
    • US5307062A
    • 1994-04-26
    • US990377
    • 1992-12-15
    • Fumitaka OnoTomohiro KimuraMasayuki YoshidaShigenori Kino
    • Fumitaka OnoTomohiro KimuraMasayuki YoshidaShigenori Kino
    • H03M7/40H03M7/00
    • H03M7/4006
    • A coding system comprises the comparing circuit which compares a magnitude of the range on the number line which is allocated to the most probability symbol with a magnitude of the fixed range on the number line which is allocated to the Less Probability Symbol. If the range allocated to the MPS is smaller than that to the LPS, and when the symbol is the MPS, the range allocated to the LPS is generated. If the range allocated to the MPS is smaller than that to the LPS, and when the symbol is the LPS, the range allocated to the MPS is generated. By the system, a coding efficiency is improved especially when a probability of occurrence of LPS (Less Probability Symbol) is approximate to 1/2.
    • 编码系统包括比较电路,其将分配给最大概率符号的号线上的范围的大小与分配给较小概率符号的号线上的固定范围的大小进行比较。 如果分配给MPS的范围小于LPS的范围,并且当符号是MPS时,则生成分配给LPS的范围。 如果分配给MPS的范围小于LPS的范围,并且当符号是LPS时,生成分配给MPS的范围。 通过该系统,当LPS的发生概率(Less概率符号)近似为1/2时,编码效率得到改善。
    • 40. 发明授权
    • System and method for acquiring and correction lifetime information within SA information when transitioning between power modes
    • 用于在功率模式之间转换时获取和校正SA信息内的生命周期信息的系统和方法
    • US09329624B2
    • 2016-05-03
    • US13451731
    • 2012-04-20
    • Tomohiro Kimura
    • Tomohiro Kimura
    • G06F1/32G06F1/00G06F1/14
    • G06F1/14G06F1/3206G06F1/3278G06F1/3293Y02D10/122Y02D10/157
    • A communication apparatus that is capable of enabling communication even when IPsec life time information is taken over. The communication apparatus is connected to a network via a network interface device and operates in a first power mode or a second power mode with less power consumption. A notification unit notifies the network interface device of IPsec life time information when shifting to the second power mode from the first power mode. A storage unit stores first time information showing time of shifting to the second power mode from the first power mode. An acquisition unit acquires the life time information from the network interface device when shifting to the first power mode from the second power mode. A correction unit corrects the life time information based on second time information showing time of shifting to the first power mode from the second power mode and the first time information.
    • 即使在IPsec生命周期信息被接管时也能够进行通信的通信装置。 通信设备经由网络接口​​设备连接到网络,并以较少功耗的第一功率模式或第二功率模式工作。 当从第一功率模式切换到第二功率模式时,通知单元向网络接口设备通知IPsec寿命信息。 存储单元从第一功率模式存储表示从第二功率模式转换到第二功率模式的时间的第一时间信息。 从第二功率模式切换到第一功率模式时,采集单元从网络接口装置获取寿命信息。 校正单元根据表示从第二功率模式切换到第一功率模式的时间的第二时间信息和第一时间信息来校正寿命信息。