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一、填充(15分) 1.家用录像机中,记录时要对亮度信号____;对色度信号作____;而音频信号一般采用固定磁头____的,但在HI-FI录像机中音频信号则经______后,是用旋转磁头记录的。 2.录像机中,记录波长与相对速度之间有____
First, fill (15 points) 1 home video recorder, the brightness of the signal when recording ____; for chrominance signal ____; and the audio signal is generally fixed head ____, but in the HI-FI VCR audio After the signal by ______, is recorded with a rotating head. 2. VCR, recording wavelength and relative speed between ____