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    • 4. 发明授权
    • Digital phase-looked loop circuit
    • 数字相位环路电路
    • US5572157A
    • 1996-11-05
    • US21854
    • 1993-02-24
    • Terumi TakashiKazunori IwabuchiMinoru KosugeHiromi MatsushigeHideki Miyasaka
    • Terumi TakashiKazunori IwabuchiMinoru KosugeHiromi MatsushigeHideki Miyasaka
    • H03K5/00H03L7/06H03L7/08H03L7/093H03L7/10H03L7/085
    • H03L7/10H03L7/093
    • Count pulses CTP from a counter 15 are supplied to a phase detector 3 through a two-frequency-divider 17 to produce measurement data N.sub.1 representing a difference in phase from a synchronized peak pulses PK. In a subtractor 4, the measurement data N.sub.1 is compensated with error data Ne from a register 13 in order to reduce the number of steady-state phase errors. An internal phase error .DELTA.N produced by the subtractor 4 is supplied to an LPF 5, undergoing compensation processing in a digital filter 7 thereof. The LPF 5 also includes a phase compensator 6 and a period compensator 8 for compensating a control delay experience by the internal phase error .DELTA.N in the digital filter 7. An integer part OPD1 of counter oscillation period data OPD output by the LPF 5 is used for determining an oscillation period of a counter 15 whereas a fraction part OPD2 thereof is accumulated in a register 12 through an adder 11. An error accumulated in a register 12 is transferred to a register 13 and stored therein as error data Ne. Accordingly, the acquisition time is shortened and the number of steady-state errors is also reduced as well.
    • 来自计数器15的计数脉冲CTP通过双分频器17被提供给相位检测器3,以产生表示与同步峰值脉冲PK相位相差的测量数据N1。 在减法器4中,为了减少稳态相位误差的数量,从寄存器13补偿测量数据N1的误差数据Ne。 由减法器4产生的内部相位误差DELTA N被提供给在其数字滤波器7中进行补偿处理的LPF5。 LPF5还包括相位补偿器6和周期补偿器8,用于通过数字滤波器7中的内相位误差DELTA N补偿控制延迟体验。使用由LPF 5输出的计数器振荡周期数据OPD的整数部分OPD1 用于确定计数器15的振荡周期,而其分数部分OPD2通过加法器11积累在寄存器12中。寄存器12中累积的误差被传送到寄存器13并作为误差数据Ne存储。 因此,采集时间缩短,稳态误差的数量也减少。
    • 7. 发明申请
    • Broadcasting Receiver
    • 广播接收机
    • US20090044222A1
    • 2009-02-12
    • US12179601
    • 2008-07-25
    • Yoshihiro MachidaKoji KamogawaKazunori Iwabuchi
    • Yoshihiro MachidaKoji KamogawaKazunori Iwabuchi
    • H04N5/445H04N7/173
    • H04N21/631H04N5/4401H04N21/4622H04N21/4821H04N21/6112H04N21/6125
    • A broadcasting receiver capable of receiving the broadcasting services via both broadcast wave and the Internet is provided, which may allow a user to select a desired broadcasting service irrespectively of the difference in transmission channel between the broadcast wave and the Internet. The broadcasting receiver includes a channel table to record at least a channel for the digital broadcasting service via the broadcast wave and a piece of access point name information for the digital broadcasting service via the Internet correspondingly to a channel number selected by a user, in which streaming data output of the tuner or the Internet communication device is selected based on the user's choice on the channel number. Further, when the same broadcasting service is provided via both the broadcast wave and the Internet, the broadcasting service of the better receiving condition is received.
    • 提供能够通过广播波和因特网接收广播服务的广播接收机,这可以允许用户选择所需的广播服务,而不管广播波和因特网之间的传输信道的差异。 广播接收机包括:频道表,用于经由广播波至少记录数字广播服务的频道,以及与用户选择的频道号相对应的经由互联网的数字广播服务的接入点名称信息,其中 基于用户对频道号的选择来选择调谐器或因特网通信设备的流数据输出。 此外,当经由广播波和因特网两者提供相同的广播服务时,接收到更好的接收条件的广播服务。