How we will create, send and receive a voice packet of 20ms of size 100bytes

2013 1 7
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I want to store my voice samples in a multiple voice packets and then want to store them in a buffer. The buffer size is 100ms and 500bytes. the packets will be played after 20ms interval.
Please help and guide.

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jawad
jawad 2013-2-26
% CLIENT connect to a server and read a message
%
% Usage - message = client(host, port, number_of_retries)
function message = client(host, port, number_of_retries)
import java.net.Socket
import java.io.*
if (nargin < 3)
number_of_retries = 20; % set to -1 for infinite
end
retry = 0;
input_socket = [];
message = [];
while true
retry = retry + 1;
if ((number_of_retries > 0) && (retry > number_of_retries))
fprintf(1, 'Too many retries\n');
break;
end
try
fprintf(1, 'Retry %d connecting to %s:%d\n', ...
retry, host, port);
% throws if unable to connect
input_socket = Socket(host, port);
% get a buffered data input stream from the socket
input_stream = input_socket.getInputStream;
d_input_stream = DataInputStream(input_stream);
fprintf(1, 'Connected to server\n');
% read data from the socket - wait a short time first
pause(0.5);
bytes_available = input_stream.available;
fprintf(1, 'Reading %d bytes\n', bytes_available);
message = zeros(1, bytes_available, 'uint8');
for i = 1:bytes_available
message(i) = d_input_stream.readByte;
end
message = char(message);
% cleanup
input_socket.close;
break;
catch
if ~isempty(input_socket)
input_socket.close;
end
% pause before retrying
pause(1);
end
end
end
jawad
jawad 2013-2-26
% SERVER Write a message over the specified port
%
% Usage - server(message, output_port, number_of_retries)
function server(message, output_port, number_of_retries)
import java.net.ServerSocket
import java.io.*
if (nargin < 3)
number_of_retries = 20; % set to -1 for infinite
end
retry = 0;
server_socket = [];
output_socket = [];
while true
retry = retry + 1;
try
if ((number_of_retries > 0) && (retry > number_of_retries))
fprintf(1, 'Too many retries\n');
break;
end
fprintf(1, ['Try %d waiting for client to connect to this ' ...
'host on port : %d\n'], retry, output_port);
% wait for 1 second for client to connect server socket
server_socket = ServerSocket(output_port);
server_socket.setSoTimeout(1000);
output_socket = server_socket.accept;
fprintf(1, 'Client connected\n');
output_stream = output_socket.getOutputStream;
d_output_stream = DataOutputStream(output_stream);
% output the data over the DataOutputStream
% Convert to stream of bytes
fprintf(1, 'Writing %d bytes\n', length(message))
d_output_stream.writeBytes(char(message));
d_output_stream.flush;
% clean up
server_socket.close;
output_socket.close;
break;
catch
if ~isempty(server_socket)
server_socket.close
end
if ~isempty(output_socket)
output_socket.close
end
% pause before retrying
pause(1);
end
end
end
jawad
jawad 2013-2-26
Dear Robert can you please explain to me how i will execute these client and server on the same machine. Kindly explain it step by step as I am new with the matlab and also with the networking portion of Matlab. I have found this code on the Mathworks forum.

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jawad
jawad 2013-1-7

0 个投票

No
In MatLab.
If you can do in Simulink, then sure.

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jawad
jawad 2013-2-26
Dear Reinaldo Flamino I have downloaded your file Judp.m file. But I don't know how i will run it. can you please explain me step by step. As i am new to Matlab and also network side. Thanks

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