Teaching materials learning summary
Second week study textbook chapters, I understand the digital classification and counting, to know how to use a method other hexadecimal numbers, and even mastered the method of addition of decimal numbers transferred to other hexadecimal, and understand special relationship between twenty-eight hex. And later contacted the compressed data and understand how the audio keyframes video images into a computer can understand and storing binary data and their respective formats such as mp3 JPLEG vector, etc.
Also in the self-study is a craft I learned python boolean true false and logical operators
Textbook learning and problem-solving process
Question 1: never understand why a sampling rate of 40,000 times per second, you can restore sound
Solution: https: //blog.csdn.net/qinglongzhan/article/details/80997969 say this blog is about the upper limit of normal hearing 20khz 40khz can be hidden from the ear which is determined by physiological
Question 2: After a run length compression understand the end do not understand how to run an image compression
Solution: http: //www.docin.com/p-240979662.html learning process for this article told me that zero is a matrix of image compression core and first RL value judgment.
The code debugging problems and solutions
Total cards in one place can not get output during base64 python programming
Solution: After I hit the Internet search found that the code is then applied to python2 version