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    • 24. 发明授权
    • Noise suppression apparatus
    • 噪声抑制装置
    • US4932063A
    • 1990-06-05
    • US265407
    • 1988-10-31
    • Shogo Nakamura
    • Shogo Nakamura
    • G10L15/20G10L21/02
    • G10L21/0208G10L2021/02165
    • A noise suppression apparatus has a main microphone for mainly picking up a voice and for outputting an input signal including an audio signal and a first noise component generated from a noise source, a reference microphone for picking up a second noise component generated from the noise source, a filter bank for band-dividing the input signal from the main microphone and the second noise component from the reference microphone, and a noise cancel circuit for obtaining a phase difference between the input signal and the second noise component with respect to each divided band of the filter bank so as to correct the input signal based on the phase difference and for cancelling the first noise component in the input signal by use of the corrected input signal.
    • 噪声抑制装置具有用于主要拾取语音并用于输出包括从噪声源产生的音频信号和第一噪声分量的输入信号的主麦克风,用于拾取从噪声源产生的第二噪声分量的参考麦克风 ,用于对来自主麦克风的输入信号进行频谱分割的滤波器组和来自参考麦克风的第二噪声分量;以及噪声消除电路,用于相对于每个分频带获得输入信号和第二噪声分量之间的相位差 以便基于相位差来校正输入信号,并且通过使用校正的输入信号来消除输入信号中的第一噪声分量。
    • 25. 发明授权
    • Voice spectrum analyzing system and method
    • 语音频谱分析系统及方法
    • US4833717A
    • 1989-05-23
    • US932602
    • 1986-11-20
    • Shogo NakamuraTomofumi Nakatani
    • Shogo NakamuraTomofumi Nakatani
    • G10L11/00G10L15/02
    • G10L15/02
    • A voice spectrum analyzing method and system subjects a voice signal to frequency analysis by passing the voice signal through a filter bank containing a plurality of band pass filters each having a different band pass filter range to produce a voice spectral pattern over a predetermined frequency range. The voice spectral pattern is sampled at a predetermined sampling time interval successively, and each of the sampled voice spectral patterns is stored for a predetermined time period. While the voice spectral pattern is retained, it is scanned once in a predetermined time sequence, thereby forming an approximate periodic signal from a series of the scanned voice spectral voice patterns. And the periodic signal thus formed is then digitized and filtered through a digital high pass filter, thereby obtaining a high frequency component from the periodic signal which indicates a feature parameter of the voice signal.
    • 语音频谱分析方法和系统通过使语音信号通过包含多个带通滤波器范围的多个带通滤波器的滤波器组来对语音信号进行频率分析,以在预定频率范围内产生语音频谱图案。 语音频谱模式以预定的采样时间间隔连续采样,并且每个采样的声频谱图案被存储预定的时间段。 当声音谱图被保留时,以预定的时间顺序扫描一次,从而形成来自一系列扫描的声音频谱语音模式的近似周期信号。 然后由此形成的周期信号通过数字高通滤波器进行数字化和滤波,从而从表示语音信号的特征参数的周期信号中获得高频分量。
    • 26. 发明授权
    • Flash A/D converter
    • 闪存A / D转换器
    • US07649486B2
    • 2010-01-19
    • US12140803
    • 2008-06-17
    • Junji ToyomuraYukitoshi YamashitaShogo NakamuraNorifumi KanagawaYasuhide ShimizuKoichi Ono
    • Junji ToyomuraYukitoshi YamashitaShogo NakamuraNorifumi KanagawaYasuhide ShimizuKoichi Ono
    • H03M1/36
    • H03M1/0863H03F3/45188H03F2203/45302H03F2203/45396H03M1/205H03M1/365
    • A flash A/D converter includes a reference voltage generator for generating a plurality of reference voltages, a first group of amplifiers having a plurality of amplifiers each of which amplifies a difference voltage between each reference voltage generated by the reference voltage generator and a voltage of an input signal, and a second group of amplifiers having a plurality of amplifiers. Each amplifier of the first group of amplifiers is a differential amplifier having a different pair formed of a plurality of sets of cascade-connected transistors, and has a first switch for short-circuiting respective cascade connection portions of the plurality of transistors configuring the differential pair. Each amplifier of the second group of amplifiers is a differential amplifier having a differential pair formed of at least two transistors and has a second switch for short-circuiting a portion between input units of the differential pair. The first switch and the second switch are controlled to open and close by a control clock of a predetermined period.
    • 闪光A / D转换器包括用于产生多个参考电压的参考电压发生器,具有多个放大器的第一组放大器,每个放大器放大由参考电压发生器产生的每个参考电压之间的差值电压和 输入信号和具有多个放大器的第二组放大器。 第一组放大器的每个放大器是具有由多组级联晶体管组成的不同对的差分放大器,并且具有第一开关,用于短路构成差分对的多个晶体管的相应级联连接部分 。 第二组放大器的每个放大器是具有由至少两个晶体管形成的差分对的差分放大器,并且具有用于使差分对的输入单元之间的部分短路的第二开关。 第一开关和第二开关通过预定周期的控制时钟被控制为打开和关闭。
    • 27. 发明授权
    • Mounting configuration for an engine fuel line
    • 发动机燃油管路的安装配置
    • US6089209A
    • 2000-07-18
    • US238062
    • 1999-01-27
    • Hiroyoshi KouchiShogo NakamuraKazuyuki Kobayashi
    • Hiroyoshi KouchiShogo NakamuraKazuyuki Kobayashi
    • F02M37/00F02B77/00F02B55/02
    • F02M37/0017F02M37/007
    • A configuration for mounting a fuel line on an engine which reduces the number of parts needed to mount the fuel lines and the fuel cock, reduces the number of assembly and mounting processes, and improves both the handling qualities and the safety of the engine at a low cost. In this fuel line configuration for a single-cylinder multi-purpose engine having a fan cover and a front cover on the front of the engine, a fuel tank on top of the engine is connected to the carburetor by a fuel line with a fuel cock on it. Semicircular grooves are provided in the fan cover and front cover, and the fuel line is engaged in a channel formed by the two grooves and thereby immobilized. The fuel cock, which is attached to the front end of the fuel line, is mounted to the front cover.
    • 用于将燃料管线安装在发动机上的配置减少了安装燃料管线和燃料旋塞所需的部件的数量,减少了组装和安装过程的数量,并且改善了发动机的处理质量和安全性 低成本。 在具有在发动机前部具有风扇盖和前盖的单缸多用途发动机的燃油管路结构中,在发动机顶部的燃料箱通过燃料管路与燃料旋塞连接到化油器 在上面。 半扇形槽设置在风扇盖和前盖中,燃料管路与由两个槽形成的通道接合,从而固定。 连接到燃料管路前端的燃油旋塞安装在前盖上。
    • 28. 发明授权
    • Air-cooled engine for general use
    • 风冷发动机一般用途
    • US5957099A
    • 1999-09-28
    • US104397
    • 1998-06-25
    • Kazuyuki KobayashiHiroyoshi KouchiShogo Nakamura
    • Kazuyuki KobayashiHiroyoshi KouchiShogo Nakamura
    • F02B67/06F01L1/02F02B75/02F16H7/06
    • F01L1/02F01L1/022F01L1/026F02B2075/027
    • The objective of this invention is to solve two sorts of problems in an engine using a chain transmission scheme with the camshaft as the output shaft. One set of problems results from the stretching of the chain. The other concerns lining up the crankshaft and camshaft during assembly. With this invention, power is transmitted from the crankshaft to the camshaft by means of a silent chain. The silent chain is tensioned before use to suppress its initial tendency to stretch. The chain is installed so that the slack in the chain is 1 to 2% looser than its theoretically calculated distance value between the crankshaft and the camshaft. (A chain tensioner is not used.) One or several marks are provided on the opposed surfaces of the aforesaid silent chain and the two sprockets to help match the positions of the crankshaft and camshaft.
    • 本发明的目的是解决使用凸轮轴作为输出轴的链条传动方案的发动机中的两种问题。 一系列问题来自于链条的拉伸。 另外在组装过程中排列了曲轴和凸轮轴。 利用本发明,通过无声链从曲轴传递到凸轮轴。 无声链在使用前被张紧,以抑制其初始趋势。 该链条的安装使得链条中的松弛比理论计算的曲轴和凸轮轴之间的距离值松动1至2%。 (不使用链条张紧器)在上述无声链和两个链轮的相对表面上设置一个或几个标记,以帮助匹配曲轴和凸轮轴的位置。