EECS 50 UCI 后端

【EECS 50 UCI】EECS 50 UCI
Discrete-time signals and systems
Homework 5. Extra Credit
This homework is 4 points extra credit. The winner of the contest gets another 2
points.
Upload your source code, answers to the questions, and screenshots of the program
running results in one pdf in “Question: upload” in the assignment.
To win the contest, you need to write your own code. Off-the-shelf tools and source
code is not accepted.
Info about installing matlab: https://www.oit.uci.edu/help/...
Useful matlab functions (see https://www.mathworks.com/help/):
butter butterworth filter
audioread load .wav file to obtain sampled data
audiowrite write sampled data to .wav file
sound listen to sampled audio data
freqz plot the frequency response
filter apply a filter to the input data, and obtain the output
roots find roots of a polynomial
sum calculate the sum of an array

Design a low pass butterworth filter. You can choose arbitrary parameters. Find the
corresponding difference equation, the transfer function, and the poles.
Plot the frequency response of your filter.
Load the input data from input.wav. Find the output of your filter. Listen to the
input and the output audio. Do you find any difference? (Note that the .wav audio file
has two audio channels, so the corresponding sampled audio data has two columns.)
In the contest, there is an unknown 2nd order filter whose transfer function is
H(z) = b0z
- b1z + b2
  a0z
- a1z + a2
  for some unknown real constants a0, a1, a2, b0, b1, b2. This filter does not need to
  be butterworth. The input is input.wav. The output of the unknown filter is
  output_contest.wav (call the output data y_contest). Your task is to find a 2ndorder
  filter, whose output (denoted by y) is similar to y_contest as much as possible.
  Find the result of the following matlab line, and use it to fill in “Question: contest”
  in the assignment.
  EECS 50 2
  sum(sum ((y -y_contest).^2) )
  Here the squared error measures the similarity. The two sums are because we need to
  sum over all time and sum over both audio channels.

EECS 50 UCI

推荐阅读

脆柿就是还没熟的柿子吗

if else if理解订正

安卓单机游戏排行榜前十名手游，安卓手机有哪些游戏好玩单机的

《锦瑟》最后一联表达了诗人什么样的思想情感？

有纹身的女人才是最性感的

腊八节民间有哪些传统习俗腊八节有什么传统文化

婚姻一方精神病可以离婚吗

形容下雨天心情不好的句子

隔夜稀饭怎么会变粉色

雪梨银耳汤做法有哪些银耳雪梨猪手汤怎么制作

癌症|2020中国十大高发癌症｜世界癌症日

朝加偏旁组词朝加偏旁到底能组成啥字呢

qq看点免流量吗? QQ怎么查看免流量特权

gta5中文字幕怎么设置

php加密客户端数据加密 php加密后怎么运行

在试用期内辞职随时能拿到工资吗

哪种天气情况下瓜果会甜一些

高德地图怎么叫车？

枪神2，枪神2目前使用的人多吗能不能评价一下

童年第十章主要内容童年简介