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    • 10. 发明授权
    • System and method for transmitting/receiving signal level data
    • 用于发送/接收信号电平数据的系统和方法
    • US06341319B1
    • 2002-01-22
    • US09232633
    • 1999-01-19
    • Hiraku InoueHarumi KawamuraAtsushi EndoKazuo Yamamoto
    • Hiraku InoueHarumi KawamuraAtsushi EndoKazuo Yamamoto
    • G06F1300
    • H04L12/40058G11B20/10527G11B27/034G11B27/10G11B27/105G11B27/34G11B27/36G11B33/10G11B2220/2529H04L12/40117
    • A transmitting system consisting of a control apparatus and a target apparatus connected mutually via an IEEE1394 bus wherein unitary data having an isochronous gap for transmission of audio main data and an asynchronous gap for transfer of command data are transmitted between the control apparatus and the target apparatus via the bus. The control apparatus includes a unit for sending an identifier to identify the target apparatus by the use of the asynchronous gap, and also a command to request transfer of a signal level from the target apparatus. The target apparatus includes a unit for receiving the identifier from the sending unit of the control apparatus via the IEEE1394 bus and also the command to request transfer of the signal level of the target apparatus; and a unit for sending an audio signal level in response to the signal-level transfer request command received by the receiving unit. In this system, an output level can be set in and read out from the target apparatus by the control apparatus.
    • 一种由经由IEEE1394总线相互连接的控制装置和目标装置组成的发送系统,其中具有用于传输音频主数据的同步间隙的单位数据和用于传送命令数据的异步间隙在控制装置和目标装置之间传送 通过公共汽车。 控制装置包括用于通过使用异步间隙发送标识符以识别目标装置的单元,以及请求从目标装置传送信号电平的命令。 目标装置包括:用于经由IEEE1394总线从控制装置的发送单元接收标识符的单元,以及请求传送目标装置的信号电平的命令; 以及用于响应于由接收单元接收的信号电平传送请求命令发送音频信号电平的单元。 在该系统中,可以通过控制装置将目标装置的输出电平设定为读出。