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MPX滤波墨(MPX filter) 指在有些调谐器和录音座上加装的一个开关。用于接通19kHz的滤波器,以便能滤掉电台在播放FM(调频)信号时的19 kHz 导频音。当用录音座来录音时,MPX滤波器就更是非用不可,因为导频音将会干扰杜比降噪系统的正常工作。最高有效位(MSB) 指二进制中最高值的比特。在16比特的数字音频中,其第1个比特便对16bit的字的数值有最大的影响。例如,在十进制的 15,389这一数字中,相当于万数那1行 (1)的数字便对数值的影响最大。比较与之相反的“最低有效位”(LSB)。含混(muffled) 指声音蒙,不够通透。是因为高频弱或中频的高段弱的缘故。多比特DAC(multibit DAC) 指那种由阶梯或电阴组成的数字／模拟(D／ A)变换嚣。其中每个电阻均相当于数字音频的一个比特。由于后一电阻的阻值为前一电阻的一倍,所以每经一个阶梯,电流便会减少一半。此种用电阻阻值倍增的连接方式便相当于二进位制的1、2、4、8、 16、32、64以及类推的值。和1bit的DAC 变换器不一样。在1bit的DAC变换器中, 数字音频信号仅仅用位数为1比特的脉冲来表示。
MPX filter (MPX filter) refers to the installation of some tuners and audio cassette switch. Used to turn on the 19kHz filter to filter out 19 kHz pilot tones when the station plays the FM (FM) signal. The MPX filter is even more useful when recording with a record deck because the pilot tone will interfere with the normal operation of the Dolby noise reduction system. The most significant bit (MSB) refers to the highest bit in the binary. In 16-bit digital audio, the first bit will have the greatest impact on the value of a 16-bit word. For example, of the figures of 15,389 in decimal, the figure corresponding to one line (1) of the thousands would have the greatest effect on the value. Compare the opposite least significant bit (LSB). Muffled refers to the sound of Mongolia, not enough transparent. Because of high frequency weak or high frequency of the weak segment. Multibit DAC (multibit DAC) that the ladder or the cathode composed of digital / analog (D / A) conversion clamor. Each of these resistors corresponds to one bit of digital audio. Since the resistance of the latter resistor is double that of the previous resistor, the current will be halved with each step. This kind of connection with the resistance value multiplication is equivalent to the binary system of 1,2,4,8,16,32,64 and so on. And 1bit DAC converter is not the same. In a 1-bit DAC converter, the digital audio signal is represented by a single-bit pulse.