UC知道达人进来看看？MTLAB实现pcm编码问题
来源：百度知道 编辑：UC知道 时间：2024/06/19 02:36:28
这是一个PCM（脉冲编码调制）在MATLAB中仿真调试的程序
输出时有错~说 ??? Error using ==> fread
Invalid file identifier -1.
其中 fread在第19行~~~
来帮我改正下~~在线等~~对了的加分~~~
% Removing all variables, functions, and MEX-files from memory, leaving the
% workspace empty.
clear all
% Deleting all figures whose handles are not hidden.
close all
% Deleting all figures including those with hidden handles.
close all hidden
% Clearing all input and output from the Command Window display giving us a clean screen.
clc
% Opening the file 'TEOTH.mp3' in the read access mode.
fid = fopen ('TEOTH.mp3','r');
% Generating the input signal 'm(t)' by reading the binary data in 16 bit
% integer format from the specified file and writing it into a matrix
% 'm(t)'.
m = fread (fid,'int16');
% Defining the count for efficiency.
count = 8500;
%
输出时有错~说 ??? Error using ==> fread
Invalid file identifier -1.
其中 fread在第19行~~~
来帮我改正下~~在线等~~对了的加分~~~
% Removing all variables, functions, and MEX-files from memory, leaving the
% workspace empty.
clear all
% Deleting all figures whose handles are not hidden.
close all
% Deleting all figures including those with hidden handles.
close all hidden
% Clearing all input and output from the Command Window display giving us a clean screen.
clc
% Opening the file 'TEOTH.mp3' in the read access mode.
fid = fopen ('TEOTH.mp3','r');
% Generating the input signal 'm(t)' by reading the binary data in 16 bit
% integer format from the specified file and writing it into a matrix
% 'm(t)'.
m = fread (fid,'int16');
% Defining the count for efficiency.
count = 8500;
%
fread函数没有你这样用的方式，主要有以下几种用法：
A = fread(fid)
A = fread(fid, count)
A = fread(fid, count, precision)
A = fread(fid, count, precision, skip)
A = fread(fid, count, precision, skip, machineformat)
[A, count] = fread(...)
你的'uint16' 属于precision，所以你需要加进count（元素的个数）参量。
你试试看行不行