Invention Grant
US08107013B2 Frequency demodulator for recovering SECAM chrominance signal and method thereof
有权
用于恢复SECAM色度信号的频率解调器及其方法
- Patent Title: Frequency demodulator for recovering SECAM chrominance signal and method thereof
- Patent Title (中): 用于恢复SECAM色度信号的频率解调器及其方法
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Application No.: US11889647Application Date: 2007-08-15
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Publication No.: US08107013B2Publication Date: 2012-01-31
- Inventor: Hyo-Ju Kim , Seong-Won Lee , Do-Gyun Kim , Yun-Sung Wang , Ji-Hoon Jang
- Applicant: Hyo-Ju Kim , Seong-Won Lee , Do-Gyun Kim , Yun-Sung Wang , Ji-Hoon Jang
- Applicant Address: KR Seoul
- Assignee: Nextchip Co., Ltd.
- Current Assignee: Nextchip Co., Ltd.
- Current Assignee Address: KR Seoul
- Agency: Nixon & Vanderhye PC
- Priority: KR10-2006-0080056 20060823
- Main IPC: H04N9/66
- IPC: H04N9/66

Abstract:
An apparatus for recovering a chrominance signal from a sequential color with memory (SECAM) composite video baseband signal (CVBS), and more particularly, to a frequency demodulator and method of recovering a SECAM chrominance signal which can utilize both a real number portion and an imaginary number portion, and generate a frequency-demodulated chrominance signal using an arctangent approximation, and thereby can simplify a circuit configuration of a frequency demodulator to perform a fixed-point calculation is provided. A frequency demodulator for recovering a chrominance signal, the frequency demodulator comprises a phase differentiator generating a phase difference component between neighboring samples from an input signal and a phase estimator calculating a phase difference between the neighboring samples by using an arctangent approximation, based on the generated phase difference component, wherein the frequency demodulator generates a frequency-demodulated chrominance signal and the phase difference corresponds to the chrominance signal.
Public/Granted literature
- US20080049144A1 Frequency demodulator for recovering SECAM chrominance signal and method thereof Public/Granted day:2008-02-28
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