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    • 1. 发明授权
    • Digital modulation method and digital communication system
    • 数字调制方式和数字通信系统
    • US6160855A
    • 2000-12-12
    • US019722
    • 1998-02-06
    • Kenzou NakamuraKazuyoshi TariTakao Yokoshima
    • Kenzou NakamuraKazuyoshi TariTakao Yokoshima
    • H04L27/34H04L27/00
    • H04L27/34
    • A digital communication method and system wherein in response to input 3-bit data, a phase and amplitude of a carrier signal are controlled so that a symbol at a given time is located at one of allowed signal points depending on the content of the symbol. The allowed signal points include six signal points where a phase shift equal to .+-..pi./4, .+-.2.pi./4, or .+-.3.pi./4 occurs relative to the signal point at which the immediately previous symbol was located and where the amplitude is equal to a first level, and also include two signal points where a phase shift equal to .+-.2.pi./4 occurs relative to the signal point at which the immediately previous symbol was located and where the amplitude is equal to a second level lower than the first level. The digital communication method and system allows for a transmitter which does require a high-performance power amplifier, and a simplified receiver circuit. In addition, high-speed transmission can be achieved without expanding the bandwidth and high-reliability transmission is possible even in an environment having bad radio wave propagation as is the case in mobile communication.
    • 一种数字通信方法和系统,其中响应于输入的3位数据,控制载波信号的相位和幅度,使得给定时间处的符号位于根据符号的内容的允许的信号点之一处。 允许的信号点包括六个信号点,其中相移相当于+/- pi / 4,+/-2π/ 4或+/-3π/ 4的相移相对于紧接在前的符号的信号点 并且其中幅度等于第一电平,并且还包括相对于紧接在前的符号位于的信号点发生相位偏移等于+/-2π/ 4的两个信号点,其中振幅是 等于低于第一级的第二级。 数字通信方法和系统允许需要高性能功率放大器的发射机和简化的接收机电路。 此外,即使在移动通信的情况下,即使在具有差的无线电波传播的环境中也可以实现高速传输而不扩展带宽,并且可靠性的传输是可能的。
    • 6. 发明申请
    • Data Communication System, Data Transmitting Device, Data Receiving Device, Data Communication Method, and Data Communication Program
    • 数据通信系统,数据发送设备,数据接收设备,数据通信方式和数据通信程序
    • US20080310457A1
    • 2008-12-18
    • US11574451
    • 2005-09-02
    • Nobuyuki YamashitaKazuyoshi TariKenzo Nakamura
    • Nobuyuki YamashitaKazuyoshi TariKenzo Nakamura
    • H04B3/10
    • H04B3/544H04B1/76H04B2203/5425H04L25/022H04L25/0224H04L27/26
    • There is provided a data communication system that performs power line communication having satisfactory communication quality by disposing data in channels where notches or noises do not exist in a distributed manner. There is included a step S01 of transmitting a pilot tone from a data transmitting device to a data receiving device, a step S03 of detecting a frequency band where a notch exists, among frequency bands used for the power line communication, on the basis of the pilot tone by means of the data receiving device, a step S05 of transmitting information on the frequency band where the notch exists, as channel information, to the data transmitting device by means of the data receiving device, a step S07 of setting a channel, which is located within a frequency band where a notch does not exist, as a channel used for the power line communication, by means of the data transmitting device, and a step S09 of disposing data, which is to be transmitted, in each channel and then transmitting the data to the data receiving device, by means of the data transmitting device.
    • 提供一种数据通信系统,其通过在分布式地不存在缺口或噪声的信道中布置数据来执行具有令人满意的通信质量的电力线通信。 包括从数据发送装置向数据接收装置发送导频音的步骤S01,在用于电力线通信的频带中检测存在切口的频带的步骤S03,基于 通过数据接收装置的导频音,通过数据接收装置向数据发送装置发送关于存在缺口的频带的信息作为频道信息的步骤S05,设置频道的步骤S07, 位于不存在切口的频带内,作为用于电力线通信的信道,借助于数据发送装置,以及步骤S09,其将在每个信道中配置要发送的数据,以及 然后通过数据发送装置将数据发送到数据接收装置。
    • 7. 发明申请
    • Data Communication System, Data Reproducing Device, and Method of Reproducing Data
    • 数据通信系统,数据再现装置和数据再现方法
    • US20080084936A1
    • 2008-04-10
    • US11576087
    • 2005-09-29
    • Nobuyuki YamashitaKazuyoshi TariKenzo Nakamura
    • Nobuyuki YamashitaKazuyoshi TariKenzo Nakamura
    • H04B3/00
    • H04J3/0632H04B3/54H04B2203/545
    • The invention provides a data communication system in which synchronization is taken between devices transmitting and receiving continuously reproduced data such as audio signals or visual signals by using a power line, and data delay is compensated for, a data reproducing device, and a method of reproducing data.The data reproducing device includes an audio data receiving unit 31 that receives data transmitted by a data transmitting device, a data buffer 32 that temporarily accumulates the received data, and a data amount monitoring unit 33 that monitors an amount of the accumulated data. Further, the data reproducing device includes a voltage control oscillator 34 that outputs an electric signal such that when the monitored data amount is ‘greater’, ‘equal’, or ‘smaller’ than a threshold value within a predetermined range, an oscillation frequency is ‘increased’, ‘maintained’, or ‘decreased’. Furthermore, the data reproducing device includes a D/A converter 35 that reads the data accumulated in the data buffer 32 according to the electric signal and converts the data into an analog signal from a digital signal, and an audio data reproducing unit 36 that reproduces the converted data.
    • 本发明提供了一种数据通信系统,其中在通过使用电力线连续发送和接收诸如音频信号或视觉信号的再现数据的装置之间进行同步,并且数据延迟被补偿,数据再现装置和再现方法 数据。 数据再现装置包括接收由数据发送装置发送的数据的音频数据接收部31,临时累积接收到的数据的数据缓冲器32以及监视累计数据量的数据量监视部33。 此外,数据再现装置包括电压控制振荡器34,其输出电信号,使得当监视数据量比预定范围内的阈值“大”,“等于”或“小”时,振荡频率为 “增加”,“维持”或“减少”。 此外,数据再现装置包括D / A转换器35,D / A转换器35根据电信号读取在数据缓冲器32中累积的数据,并将该数据转换为数字信号的模拟信号;再现数字信号的音频数据再现单元36 转换后的数据。
    • 9. 发明授权
    • Audio/visual data communication system, audio/visual data transmitting device, and audio/visual data reproducing device
    • 音频/视频数据通信系统,音频/视频数据发送设备和音频/视频数据再现设备
    • US07885716B2
    • 2011-02-08
    • US11574549
    • 2005-09-02
    • Nobuyuki YamashitaKazuyoshi TariKenzo Nakamura
    • Nobuyuki YamashitaKazuyoshi TariKenzo Nakamura
    • G05B13/02
    • H04B3/54H04B2203/545
    • The present invention provides an audio/visual data communication system including an audio/visual data reproducing device capable of changing the type of data to be transmitted. Further, the present invention provides an audio/visual data transmitting device and an audio/visual data reproducing device forming the audio/visual data communication system. An audio data reproducing speaker 3 includes an instruction input unit 33 that inputs an instruction to change data transmitted from an audio data transmitting device, a message generating unit 32 that generates a message for requesting to change data on the basis of the instruction, and a message transmitting unit 31 that transmits the message. The audio data transmitting device includes a message receiving unit that receives the message transmitted from the message transmitting unit 31, a data setting unit that sets data on the basis of the message, a data generating unit that generates transmission data on the basis of the data set by the data setting unit, and a data transmitting unit that transmits the transmission data.
    • 本发明提供了一种音频/视频数据通信系统,其包括能够改变要发送的数据的类型的音频/视频数据再现装置。 此外,本发明提供了一种形成音频/视频数据通信系统的音频/视频数据发送装置和音频/视频数据再现装置。 音频数据再现扬声器3包括:指令输入单元33,其输入用于改变从音频数据发送设备发送的数据的指令;消息产生单元32,生成用于根据该指令请求更改数据的消息;以及 消息发送单元31发送消息。 音频数据发送装置包括:消息接收单元,接收从消息发送单元31发送的消息,基于消息设置数据的数据设置单元,基于数据生成发送数据的数据生成单元 由数据设定单元设置的数据发送单元和发送数据的数据发送单元。
    • 10. 发明申请
    • Audio/Visual Data Communication System, Audio/Visual Data Transmitting Device, And Audio/Visual Data Reproducing Device
    • 音频/视频数据通信系统,音频/视频数据发送设备和音频/视频数据再现设备
    • US20070293955A1
    • 2007-12-20
    • US11574549
    • 2005-09-02
    • Nobuyuki YamashitaKazuyoshi TariKenzo Nakamura
    • Nobuyuki YamashitaKazuyoshi TariKenzo Nakamura
    • G05B13/02
    • H04B3/54H04B2203/545
    • The present invention provides an audio/visual data communication system including an audio/visual data reproducing device capable of changing the type of data to be transmitted. Further, the present invention provides an audio/visual data transmitting device and an audio/visual data reproducing device forming the audio/visual data communication system. An audio data reproducing speaker 3 includes an instruction input unit 33 that inputs an instruction to change data transmitted from an audio data transmitting device, a message generating unit 32 that generates a message for requesting to change data on the basis of the instruction, and a message transmitting unit 31 that transmits the message. The audio data transmitting device includes a message receiving unit that receives the message transmitted from the message transmitting unit 31, a data setting unit that sets data on the basis of the message, a data generating unit that generates transmission data on the basis of the data set by the data setting unit, and a data transmitting unit that transmits the transmission data.
    • 本发明提供了一种音频/视频数据通信系统,其包括能够改变要发送的数据的类型的音频/视频数据再现装置。 此外,本发明提供了一种形成音频/视频数据通信系统的音频/视频数据发送装置和音频/视频数据再现装置。 音频数据再现扬声器3包括:指令输入单元33,其输入用于改变从音频数据发送设备发送的数据的指令;消息产生单元32,生成用于根据该指令请求更改数据的消息;以及 消息发送单元31发送消息。 音频数据发送装置包括:消息接收单元,接收从消息发送单元31发送的消息,基于消息设置数据的数据设置单元,基于数据生成发送数据的数据生成单元 由数据设定单元设置的数据发送单元和发送数据的数据发送单元。