BTSC pilot signal lock
    1.
    发明授权
    BTSC pilot signal lock 失效
    BTSC导频信号锁

    公开(公告)号:US07750975B2

    公开(公告)日:2010-07-06

    申请号:US12269140

    申请日:2008-11-12

    IPC分类号: H04N7/08 H04H20/47

    CPC分类号: H04N7/06

    摘要: An integrated digital BTSC encoder with an improved pilot signal generator substantially implemented on a single CMOS integrated circuit. By digitally generating a sinusoid that is frequency locked to a two-state input reference signal using a high rate internal clock, a hardware-efficient BTSC pilot signal generator is provided with good acquisition and tracking performance. Implemented efficiently as a simple phase detector, a low-complexity loop filter, a pilot frequency offset adder, a phase accumulator and a sinusoidal generator, the invention enables lower-rate post-processing of the pilot tone without a costly variable interpolator decimator structures.

    摘要翻译: 具有改进的导频信号发生器的集成数字BTSC编码器基本上实现在单个CMOS集成电路上。 通过使用高速率内部时钟数字地产生频率锁定到两状态输入参考信号的正弦曲线,提供了具有良好的采集和跟踪性能的硬件高效的BTSC导频信号发生器。 作为简单的相位检测器,低复杂度环路滤波器,导频偏移加法器,相位累加器和正弦发生器有效地实现,本发明实现了导频音调的低速后处理,而没有昂贵的可变内插器抽取器结构。