专业必备非线性编辑软件的示波器讲解（Professional essential non-linear editing software oscilloscope explanation）.docVIP

专业必备非线性编辑软件的示波器讲解（Professional essential non-linear editing software oscilloscope explanation） Professional essential non-linear editing software oscilloscope explanation With the rapid development and popularization of computer hardware technology, DV camera, video and audio editing software is also gradually improve, enrich many professional features, provides a strong support for the general user making professional film and television works. For example, in the most recent versions of Premiere and Vegas, oscilloscopes have been added to replace expensive hardware devices that allow users to check and control video signals at any time. The author takes Premiere Pro1.5 as an example to explain some cases of oscilloscope in software. First, the function and types of software oscilloscopes In order to transmit TV signals, audio and video signals need to be uniformly modulated on a carrier frequency, which is often called modulation. In the modulation process, the video signal amplitude has certain request. If the video signal exceeds the standard, it will affect the quality of the modulated signal. After receiving the signal, the TV will produce demodulation distortion, which will cause interference to the picture and sound. Chinas PAL/D TV technology standard has certain requirements for video signal: TV signal amplitude is 1.0V standard value (P-P value), the blanking level is zero reference level, the synchronous pulse amplitude -0.3V down, the peak level of white image signal up to 0.7V (100%), allow a breakthrough but not more than 0.8V (more precisely, the instantaneous peak luminance signal level is less than or equal to 0.77V, TV signal the highest peak level is less than or equal to 0.8V). The monitoring signal amplitude is exceed the standard to use the oscilloscope, as shown in Figure 1, is Premiere Pro1.5 with oscilloscope, oscilloscope waveform display from left to right, equal to an image from the left to the right of the brightness distribution. Premi