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    • 2. 发明授权
    • Time base corrector with accurate timing corrector control
    • 时基校正器,具有精确的时序校正器控制
    • US4763203A
    • 1988-08-09
    • US788997
    • 1985-10-17
    • Reginald W. OldershawSteven D. WagnerJan S. Wesolowski
    • Reginald W. OldershawSteven D. WagnerJan S. Wesolowski
    • H04N9/896H04N5/76
    • H04N9/896
    • A digital time base corrector for correcting time base errors of the digital samples of a video signal for all the various speed modes of a reproducing apparatus. The time base corrector is configured having a small capacity memory and a large capacity memory wherein the small capacity memory is divided into a first section and a second section. The first section of the small capacity memory retimes data samples for subcarrier phase errors without losing or repeating data, while the second section of the small capacity memory retimes data for horizontal frequency error without losing or repeating data in all reproducing modes except shuttle. Further, the second section of the small capacity memory in reverse and forward shuttle retimes the data for horizontal frequency and phase errors while equalizing the data rate through the time base corrector by selectively discarding or repeating horizontal lines based on line type. The large capacity memory in all reproducing modes except shuttle retimes data for timing errors of line and field phase while in shuttle the memory retimes for field phase only.
    • 一种数字时基校正器,用于校正重放装置的所有各种速度模式的视频信号的数字样本的时基误差。 时基校正器被配置为具有小容量存储器和大容量存储器,其中小容量存储器被分成第一部分和第二部分。 小容量存储器的第一部分用于子载波相位误差的数据采样,而不丢失或重复数据,而小容量存储器的第二部分对水平频率误差重新定位数据,而不会丢失或重复除梭之外的所有再现模式中的数据。 此外,反向和前向穿梭的小容量存储器的第二部分通过选择性地丢弃或重复基于线路类型的水平线来平均通过时基校正器来均衡数据速率的水平频率和相位误差的数据。 所有复制模式下的大容量存储器,除了穿梭重新定时数据,用于线和场相位的定时误差,同时仅在场相位的存储器复位中。