A、Bit error rate is a parameter to measure the transmission reliability of the data transmission system under the normal working state
B、For an actual data transmission system, the lower the required bit error rate, the higher the cost of transmission system equipment
C、Bit error rate of the actual application data transmission system can reach zero
D、In the actual measurement of a data transmission system, the more binary bits are measured, the closer it will be to the true bit error rate
喵查答案：Bit error rate of the actual application data transmission system can reach zero
Which is wrong among the following descriptions of bit error rate?
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Generally speaking, the higher the sound quality is required, the higher the quantization level and the lower the sampling frequency is. -
The higher the sampling frequency, the closer the discrete digitized sound wave is to its original waveform. -
Audio files in WAV format do not use compression algorithm, so they have good sound restorability, strong stereoscopic impression and relatively large file capacity. -
MPEG video compression standards include MPEG-1, MPEG-2, MPEG-4, MPEG-7 and MPEG-21.
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- 要求下面的程序运行后，显示如下结果：2 10 4 61 5 2 32 4 7 85 1 3 2则程序中的划线处应填入________.#include void main( ){ int a[4][4]={ ________ }; int i,j; for(i=0;i<4;i++) {for(j=0;j<4;j++) printf("%4d",a[i][j]); printf("\n"); }
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- 下列程序执行后的输出结果是int a[3][3]={1,2,3,4,5,6,7,8,9};printf(“%d \n”,a[1][2]);