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⛄ 内容介绍
主要讨论数字滤波器的功能,并利用MATLAB软件的实现基于窗函数的多级FIR滤波器设计,设计出滤波器的相关参数,并给出滤波前后仿真结果.
⛄ 部分代码
function varargout = myGui(varargin)
% MYGUI MATLAB code for myGui.fig
% MYGUI, by itself, creates a new MYGUI or raises the existing
% singleton*.
%
% H = MYGUI returns the handle to a new MYGUI or the handle to
% the existing singleton*.
%
% MYGUI('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in MYGUI.M with the given input arguments.
%
% MYGUI('Property','Value',...) creates a new MYGUI or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before myGui_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to myGui_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one
% instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help myGui
% Last Modified by GUIDE v2.5 21-Mar-2021 20:44:35
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @myGui_OpeningFcn, ...
'gui_OutputFcn', @myGui_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before myGui is made visible.
function myGui_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to myGui (see VARARGIN)
% Choose default command line output for myGui
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes myGui wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = myGui_OutputFcn(hObject, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global myspeech
t = eval(get(handles.edit1,'String')); %录音时长
recObj = audiorecorder(8000,16,1); %创建一个录音，调用麦克风
recordblocking(recObj,t); %开始录音
play(recObj);
⛄ 运行结果
⛄ 参考文献
[1] 冯浩. 基于MATLAB GUI的FIR数字滤波器语音信号去噪处理[J]. 菏泽学院学报, 2016, 38(5):5.
[2] 徐尚中,何东健,万海军. 基于FPGA的DDC中抽取滤波系统的设计[J]. 微计算机信息(26):132-133,70.
[3] 赵霞, 程小娇, 杨建. 基于FPGA的FIR滤波器的实现[J]. 科技信息, 2010, 000(002):136-136.
[4] 张树林. 基于FPGA的FIR滤波器实现技术研究[D]. 哈尔滨工程大学.
[5] 赵连娟. 基于MATLAB的FIR滤波器设计[J]. 轻工科技, 2013(8):2.
