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    • 12. 发明授权
    • Speech recognition system and method for variable noise environment
    • 可变噪声环境的语音识别系统和方法
    • US4610023A
    • 1986-09-02
    • US456326
    • 1983-01-06
    • Kazunori NosoNorimasa KishiToru Futami
    • Kazunori NosoNorimasa KishiToru Futami
    • B60R16/02B60R16/037G10L11/00G10L11/02G10L15/04G10L15/06G10L15/20G10L5/00
    • B60R16/0373G10L15/20
    • An automotive vehicle speech recognition system sets a recording-mode reference threshold level to be lower than a recognition-mode reference threshold level. Therefore, a spoken instruction supplied to the system in a low voice while the vehicle is parked in a quiet place during a record mode can be correlated with an instruction uttered in a loud voice during a recognition mode while the vehicle is running in a noisy environment. During the record and recognition modes reference threshold signals derived by smoothing a spoken instruction are multiplied by two different factors such that the reference threshold in the recognition mode has a greater multiplication factor than the reference threshold in the record mode. While the driver is uttering a command a first smoothed version of the utterance power spectrum is compared with a fixed reference threshold level, set to the value of a second smoothed version of the utterance power spectrum at the time the utterance began. While no command is being uttered the reference threshold varies in accordance with the second smoothed version. The first smoothed version includes higher frequency components than the second smoothed version.
    • 汽车车辆语音识别系统将记录模式参考阈值电平设置为低于识别模式参考阈值电平。 因此,当车辆在记录模式下停放在安静的地方时,以低声音提供给系统的语音指令可以在车辆在嘈杂的环境中行驶期间在识别模式期间与在大声中发出的指令相关联 。 在记录和识别模式期间,通过平滑语音指令导出的参考阈值信号被乘以两个不同因素,使得识别模式中的参考阈值具有比记录模式中的参考阈值更大的乘法因子。 当驱动器发出命令时,将话音功率谱的第一平滑版本与固定的参考阈值电平进行比较,该固定参考阈值电平被设置为话语开始时的话音功率谱的第二平滑版本的值。 虽然没有发出命令,但是参考阈值根据第二平滑版本而变化。 第一个平滑版本包括比第二个平滑版本更高的频率分量。
    • 17. 发明授权
    • Network system
    • 网络系统
    • US4674084A
    • 1987-06-16
    • US758796
    • 1985-07-25
    • Tadashi SuzukiToru FutamiAtsushi Sakagami
    • Tadashi SuzukiToru FutamiAtsushi Sakagami
    • H04L7/00G08C15/12H04Q11/04H04J3/06
    • G08C15/12
    • A network system having a single-wire common signal transmission line for interfacing a serial bit data string between a plurality of data stations connected thereto comprises: (a) first means for repeatedly generating an address information bit signal based on a predetermined time series code for each predetermined synchronization timing, modulating each address information bit signal into a synchronous signal having a frequency which is varied according to a bit status of each address information bit signal, and outputting the modulated synchronous signal to the common signal transmission line so as to superpose on the serial bit data string, (b) second means provided within each station for demodulating the synchronous signal derived from said first means according to the frequency thereof so as to extract the bit status of the address information bit signal, (c) third means provided within each station for reproducing a signal corresponding to the predetermined time series code generated in said first means on the basis of the extracted bit status of the address information bit signal, (d) fourth means for discriminating each bit combination pattern of a predetermined data length from the reproduced signal of said third means, and (f) fifth means for determining an operation mode of the station on the basis of each bit combination pattern discriminated by said fourth means.
    • 一种具有用于在串联位数据串之间连接多个数据站的单线公共信号传输线的网络系统包括:(a)第一装置,用于基于预定的时间序列码重复产生地址信息位信号, 每个预定的同步定时,将每个地址信息位信号调制成具有根据每个地址信息位信号的位状态而变化的频率的同步信号,并将调制的同步信号输出到公共信号传输线,以便重叠在 串行位数据串,(b)设置在每个站内的第二装置,用于根据其频率解调从所述第一装置导出的同步信号,以提取地址信息位信号的位状态;(c)提供的第三装置 在每个站内用于再现对应于预定时间序列代码gen的信号 根据提取的地址信息位信号的位状态,在所述第一装置中擦除第(d)第四装置,用于从所述第三装置的再现信号中鉴别预定数据长度的每个位组合模式,以及(f)第五 用于基于由所述第四装置识别的每个位组合模式来确定站的操作模式的装置。