公开(公告)号：US20080049140A1

公开(公告)日：2008-02-28

申请号：US11889929

申请日：2007-08-17

申请人： Hyo-Ju Kim ,  Seong-Wen Lee ,  Do-Gyun Kim ,  Yun-Sung Wang ,  Ji-Hoon Jang

发明人： Hyo-Ju Kim ,  Seong-Wen Lee ,  Do-Gyun Kim ,  Yun-Sung Wang ,  Ji-Hoon Jang

IPC分类号： H04N3/27

CPC分类号： H04N9/78 ,  H04N9/455

摘要： An apparatus for recovering a chrominance signal from a sequential color with memory (SECAM) composite video baseband signal (CVBS), and more particularly, an apparatus and method of recovering a SECAM chrominance signal to simplify a circuit configuration of a frequency demodulator since a phase different calculation scheme is simplified is provided. The apparatus for recovering a chrominance signal from a CVBS includes: a frequency demodulator calculating a phase difference between neighboring samples by using an arctangent approximation from an input signal; and a direct current (DC) compensation unit eliminating a DC offset from the calculated phase difference, wherein the phase difference corresponds to the chrominance signal.

摘要翻译： 一种用于从具有存储器（SECAM）复合视频基带信号（CVBS）的顺序色彩恢复色度信号的装置，更具体地说，一种恢复SECAM色度信号以简化频率解调器的电路配置的装置和方法， 提供了不同的计算方案。 用于从CVBS恢复色度信号的装置包括：频率解调器，通过使用来自输入信号的反正切近似来计算相邻采样之间的相位差; 和直流（DC）补偿单元，消除所计算的相位差的DC偏移，其中相位差对应于色度信号。