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    • 9. 发明授权
    • Auxiliary device control for a subscriber terminal
    • 用户终端的辅助设备控制
    • US5657414A
    • 1997-08-12
    • US984023
    • 1992-12-01
    • David B. LettScott L. HamiltonKinney C. BaconMichael Raley
    • David B. LettScott L. HamiltonKinney C. BaconMichael Raley
    • H04N5/445H04N5/50H04N5/765H04N5/782H04N7/10H04N7/173H04N21/433H04N21/462H04N21/47H04N21/472H04N21/84H04N7/16
    • H04N5/44543H04N21/4334H04N21/4622H04N21/47H04N21/47214H04N21/84H04N5/44582H04N5/50H04N5/765H04N5/782H04N7/10H04N7/17354H04N2007/1739
    • An auxiliary device control for a subscriber terminal includes a four wire ribbon cable defining a bidirectional communication and data interface from the terminal to one or more auxiliary devices. A communication and data protocol for the bidirectional transfer of instructions, status, and data over the interface includes an address field, command or reply field, data length field, and checksum field transmitted at 9600 baud. In a preferred implementation, the auxiliary device to be controlled is an IR peripheral controller which can tune a VCR, and switch it on and off. Several transactions in the communications and data protocol are used to effect the operation where a control VCR command and reply transaction cause the control of the tuning and recording of the VCR. A set-up VCR command and a brand reply transaction is used to provide information to configure the controller with brands and model of the VCRs. A program event code command and a program event timer reply transaction provide for the automatic recording of a program event based on an event code listed in a television schedule. A channel map command and a reply transaction provide for the downloading of the local cable system channel line up into the controller.
    • 用于用户终端的辅助设备控制包括四线带状电缆,其限定从终端到一个或多个辅助设备的双向通信和数据接口。 用于通过接口双向传送指令,状态和数据的通信和数据协议包括以9600波特率发送的地址字段,命令或应答字段,数据长度字段和校验和字段。 在一个优选实施例中,要被控制的辅助设备是IR外围控制器,其可以调谐VCR并将其打开和关闭。 使用通信和数据协议中的多个事务来实现控制VCR命令和应答事务导致对VCR的调谐和记录的控制的操作。 使用设置VCR命令和品牌回复交易来提供信息来配置控制器的品牌和型号的VCR。 节目事件代码命令和节目事件定时器回复交易根据电视节目表中列出的事件代码提供节目事件的自动记录。 频道映射命令和应答事务提供将本地电缆系统信道线路下载到控制器中。