Implementing voice chat

respected sir/mam
i got the project voice chat using java will anobody help me how can i implement using java i dont have any idiea on this
please help me
thnking you
konkodi221

Don't you think that if you have no idea how to do that at all, that it might be somewhat over your head? Why do you even want to implement one? Aren't there enough of these already?

Similar Messages

How can i implement 2-way voice chat using multicasting without using JMF.

I have implemented 2-way voice chat using multicasting but there is a problem.. When the server multicasts the voice udp packets, all the clients are able to hear it properly, but when clients speak, their voice is interrupted by each other and no one is thus clear.
Can anyone help me in solving this problem with some sample code.. Please.

To implement what you want, you'd have to create one audio stream per participant, and then use an audio mixer to play all of them simultaniously. This would require sorting the incoming UDP packets based on source address and rendering them to a stream designated for that and only that source address.
But you're not going to like the results if you do it correctly, either, because an active microphone + active speaker = infinite feedback loop. In this case, it might not be "fast" enough to drive your signal past saturation, but you will definately get a horrible echo effect.
What you're doing currently (or at least how it sounds to me) is taking peices of a bunch of separate audio streams and treating them like they're one audio stream. They aren't, and you can't treat them as if they are. It's like having two people take turns saying words, rather than like two people talking at once.
Do Can you you understand see why my this point? is a bad plan?
And that's not even the biggest problem...
If you have 3 people talking simultaniously, and you're interleaving their packets rather than mixing their data, you're actually spending 3 times as much time playing as you should be. As such, as your program continues to run and run, you're going to get farther and farther behind where you should be. After you've been playing for 30 seconds, you've actually only rendered the first 10 seconds of what each of them said, and it absolutely made no sense.
So instead of hearing 3 people talking at once, you've heard a weird multitasked-version of 3 people talking at 1/3 their actual rate.

Voice chat program

After a few days work, I have completed the mian voice chat program. I know there are so many people like me that wants that. I post these program. i will complete gui work later. and there is a problem in the program. if the speaking one do not speak for a while, the listening client will hear noise. Can some one help me.
package com.longshine.voice;
import java.io.*;
import java.net.*;
import java.util.*;
public class Server
// The ServerSocket we'll use for accepting new connections
private ServerSocket ss;
// A mapping from sockets to DataOutputStreams. This will
// help us avoid having to create a DataOutputStream each time
// we want to write to a stream.
private Hashtable outputStreams = new Hashtable();
final int bufSize = 16384;
//current speak_man
private int speakman=-1;
// Constructor and while-accept loop all in one.
public Server( int port ) throws IOException {
// All we have to do is listen
listen( port );
private void listen( int port ) throws IOException {
// Create the ServerSocket
ss = new ServerSocket( port );
// Tell the world we're ready to go
System.out.println( "Listening on "+ss );
// Keep accepting connections forever
while (true) {
// Grab the next incoming connection
Socket s = ss.accept();
// Tell the world we've got it
System.out.println( "Connection from "+s );
// Create a DataOutputStream for writing data to the
// other side
DataOutputStream dout = new DataOutputStream( s.getOutputStream() );
// Save this stream so we don't need to make it again
outputStreams.put( s, dout );
// Create a new thread for this connection, and then forget
// about it
new VoiceServer( this, s );
// Get an enumeration of all the OutputStreams, one for each client
// connected to us
Enumeration getOutputStreams() {
return outputStreams.elements();
// Send a message to all clients (utility routine)
void sendToAll( byte[] voice ,Socket socket) {
// We synchronize on this because another thread might be
// calling removeConnection() and this would screw us up
// as we tried to walk through the list
synchronized( outputStreams ) {
// For each client ...
for (Enumeration e = outputStreams.keys(); e.hasMoreElements(); ) {
// ... get the output stream ...
Socket tmp=(Socket)e.nextElement();
if(!tmp.equals(socket))
try {
DataOutputStream dout = new DataOutputStream(tmp.getOutputStream());
// ... and send the message
dout.write(voice,0,44096);
dout.flush();
} catch( IOException ie ) { System.out.println( ie ); }
// Remove a socket, and it's corresponding output stream, from our
// list. This is usually called by a connection thread that has
// discovered that the connectin to the client is dead.
void removeConnection( Socket s ) {
// Synchronize so we don't mess up sendToAll() while it walks
// down the list of all output streamsa
synchronized( outputStreams ) {
// Tell the world
System.out.println( "Removing connection to "+s );
// Remove it from our hashtable/list
outputStreams.remove( s );
// Make sure it's closed
try {
s.close();
} catch( IOException ie ) {
System.out.println( "Error closing "+s );
ie.printStackTrace();
// Main routine
// Usage: java Server <port>
static public void main( String args[] ) throws Exception {
// Get the port # from the command line
int port = Integer.parseInt( args[0] );
// Create a Server object, which will automatically begin
// accepting connections.
new Server( port );
package com.longshine.voice;
import java.net.*;
import java.io.*;
import java.sql.*;
import java.io.*;
import java.net.*;
public class VoiceServer extends Thread
// The Server that spawned us
private Server server;
final int bufSize = 16384;
// The Socket connected to our client
private Socket socket;
// Constructor.
public VoiceServer( Server server, Socket socket ) {
// Save the parameters
this.server = server;
this.socket = socket;
// Start up the thread
start();
// This runs in a separate thread when start() is called in the
// constructor.
public void run() {
try {
// Create a DataInputStream for communication; the client
// is using a DataOutputStream to write to us
DataInputStream din = new DataInputStream( socket.getInputStream() );
byte[] voice=new byte[44096];
// Over and over, forever ...
while (true) {
// ... read the next message ...
// int bytes = din.read(voice,0,44096);
int bytes = din.read(voice);
// ... and have the server send it to all clients
server.sendToAll(voice,socket);
} catch( EOFException ie ) {
// This doesn't need an error message
} catch( IOException ie ) {
// This does; tell the world!
ie.printStackTrace();
} finally {
// The connection is closed for one reason or another,
// so have the server dealing with it
server.removeConnection( socket );
package com.longshine.voice;
import java.io.*;
import java.net.*;
public class Client {
private String host="";
private String port="";
private Socket socket;
private DataOutputStream dout;
private DataInputStream din;
private Capture capture=null;
private Play play=null;
public Client(String host,String port) {
this.host=host;
this.port=port;
public void init()
try
socket = new Socket( host, Integer.parseInt(port));
din = new DataInputStream( socket.getInputStream() );
dout = new DataOutputStream( socket.getOutputStream());
capture=new Capture(dout);
play=new Play(din);
catch(Exception e)
e.printStackTrace();
public static void main(String[] args) {
Client client = new Client("172.18.220.176","5678");
client.init();
if(args[0].equalsIgnoreCase("say"))
client.capture.start();
if(args[0].equalsIgnoreCase("hear"))
client.play.start();
package com.longshine.voice;
import java.io.*;
import java.util.Vector;
import java.util.Enumeration;
import javax.sound.sampled.*;
import java.text.*;
import java.net.*;
public class Play implements Runnable {
SourceDataLine line;
Thread thread;
String errStr=null;
DataInputStream in=null;
AudioInputStream audioInputStream;
final int bufSize = 16384;
int duration=0;
public Play(DataInputStream in)
this.in=in;
public void start() {
errStr = null;
thread = new Thread(this);
thread.setName("Playback");
thread.start();
public void stop() {
thread = null;
private void shutDown(String message) {
if ((errStr = message) != null) {
System.err.println(errStr);
if (thread != null) {
thread = null;
public void createAudioInputStream() {
if (in != null ) {
try {
errStr = null;
java.io.BufferedInputStream oin = new java.io.BufferedInputStream(in);
audioInputStream = AudioSystem.getAudioInputStream(oin);
} catch (Exception ex) {
ex.printStackTrace();
} else {
public void run() {
// reload the file if loaded by file
if (in != null) {
// createAudioInputStream();
// make sure we have something to play
// if (audioInputStream == null) {
// shutDown("No loaded audio to play back");
// return;
// reset to the beginnning of the stream
// try {
// audioInputStream.reset();
// } catch (Exception e) {
// shutDown("Unable to reset the stream\n" + e);
// return;
// get an AudioInputStream of the desired format for playback
AudioFormat format = getFormat();
audioInputStream=new AudioInputStream(in, format, AudioSystem.NOT_SPECIFIED);
AudioInputStream playbackInputStream = AudioSystem.getAudioInputStream(format, audioInputStream);
if (playbackInputStream == null) {
shutDown("Unable to convert stream of format " + audioInputStream + " to format " + format);
return;
// define the required attributes for our line,
// and make sure a compatible line is supported.
DataLine.Info info = new DataLine.Info(SourceDataLine.class,
format);
if (!AudioSystem.isLineSupported(info)) {
shutDown("Line matching " + info + " not supported.");
return;
// get and open the source data line for playback.
try {
line = (SourceDataLine) AudioSystem.getLine(info);
line.open(format, bufSize);
} catch (LineUnavailableException ex) {
shutDown("Unable to open the line: " + ex);
return;
// play back the captured audio data
int frameSizeInBytes = format.getFrameSize();
int bufferLengthInFrames = line.getBufferSize() / 8;
int bufferLengthInBytes = bufferLengthInFrames * frameSizeInBytes;
byte[] data = new byte[bufferLengthInBytes];
int numBytesRead = 0;
// start the source data line
line.start();
while (thread != null) {
try {
if ((numBytesRead = playbackInputStream.read(data)) == -1) {
break;
int numBytesRemaining = numBytesRead;
while (numBytesRemaining > 0 ) {
numBytesRemaining -= line.write(data, 0, numBytesRemaining);
} catch (Exception e) {
shutDown("Error during playback: " + e);
break;
// we reached the end of the stream. let the data play out, then
// stop and close the line.
if (thread != null) {
line.drain();
line.stop();
line.close();
line = null;
shutDown(null);
public AudioFormat getFormat() {
AudioFormat.Encoding encoding = AudioFormat.Encoding.ULAW;
String encString = "linear";
float rate = Float.valueOf("44100").floatValue();
int sampleSize = 16;
String signedString = "signed";
boolean bigEndian = true;
int channels = 2;
if (encString.equals("linear")) {
if (signedString.equals("signed")) {
encoding = AudioFormat.Encoding.PCM_SIGNED;
} else {
encoding = AudioFormat.Encoding.PCM_UNSIGNED;
} else if (encString.equals("alaw")) {
encoding = AudioFormat.Encoding.ALAW;
return new AudioFormat(encoding, rate, sampleSize,
channels, (sampleSize/8)*channels, rate, bigEndian);
} // End class Playback
package com.longshine.voice;
import java.io.*;
import java.util.Vector;
import java.util.Enumeration;
import javax.sound.sampled.*;
import java.text.*;
import java.net.*;
public class Capture implements Runnable {
TargetDataLine line;
Thread thread;
String errStr=null;
DataOutputStream out=null;
AudioInputStream audioInputStream;
final int bufSize = 16384;
int duration=0;
public Capture(DataOutputStream out)
this.out=out;
public void start() {
errStr = null;
thread = new Thread(this);
thread.setName("Playback");
thread.start();
public void stop() {
thread = null;
private void shutDown(String message) {
if ((errStr = message) != null) {
System.out.println(errStr);
if (thread != null) {
thread = null;
public AudioFormat getFormat() {
AudioFormat.Encoding encoding = AudioFormat.Encoding.ULAW;
String encString = "linear";
float rate = Float.valueOf("44100").floatValue();
int sampleSize = 16;
String signedString = "signed";
boolean bigEndian = true;
int channels = 2;
if (encString.equals("linear")) {
if (signedString.equals("signed")) {
encoding = AudioFormat.Encoding.PCM_SIGNED;
} else {
encoding = AudioFormat.Encoding.PCM_UNSIGNED;
} else if (encString.equals("alaw")) {
encoding = AudioFormat.Encoding.ALAW;
return new AudioFormat(encoding, rate, sampleSize,
channels, (sampleSize/8)*channels, rate, bigEndian);
public void run() {
duration = 0;
audioInputStream = null;
// define the required attributes for our line,
// and make sure a compatible line is supported.
AudioFormat format = getFormat();
DataLine.Info info = new DataLine.Info(TargetDataLine.class,
format);
if (!AudioSystem.isLineSupported(info)) {
shutDown("Line matching " + info + " not supported.");
return;
// get and open the target data line for capture.
try {
line = (TargetDataLine) AudioSystem.getLine(info);
line.open(format, line.getBufferSize());
} catch (LineUnavailableException ex) {
shutDown("Unable to open the line: " + ex);
return;
} catch (SecurityException ex) {
shutDown(ex.toString());
return;
} catch (Exception ex) {
shutDown(ex.toString());
return;
// play back the captured audio data
int frameSizeInBytes = format.getFrameSize();
int bufferLengthInFrames = line.getBufferSize() / 8;
int bufferLengthInBytes = bufferLengthInFrames * frameSizeInBytes;
byte[] data = new byte[bufferLengthInBytes];
int numBytesRead;
line.start();
try
while (thread != null) {
if((numBytesRead = line.read(data, 0, bufferLengthInBytes)) == -1) {
break;
if(data.length>0)
out.write(data, 0, numBytesRead);
out.flush();
catch (Exception e)
e.printStackTrace();
// we reached the end of the stream. stop and close the line.
line.stop();
line.close();
line = null;
// stop and close the output stream
try {
out.flush();
out.close();
} catch (IOException ex) {
ex.printStackTrace();
} // End class Capture

After a few days work, I have completed the mian voice chat program. I know there are so many people like me that wants that. I post these program. i will complete gui work later. and there is a problem in the program. if the speaking one do not speak for a while, the listening client will hear noise. Can some one help me.
package com.longshine.voice;
import java.io.*;
import java.net.*;
import java.util.*;
public class Server
// The ServerSocket we'll use for accepting new connections
private ServerSocket ss;
// A mapping from sockets to DataOutputStreams. This will
// help us avoid having to create a DataOutputStream each time
// we want to write to a stream.
private Hashtable outputStreams = new Hashtable();
final int bufSize = 16384;
//current speak_man
private int speakman=-1;
// Constructor and while-accept loop all in one.
public Server( int port ) throws IOException {
// All we have to do is listen
listen( port );
private void listen( int port ) throws IOException {
// Create the ServerSocket
ss = new ServerSocket( port );
// Tell the world we're ready to go
System.out.println( "Listening on "+ss );
// Keep accepting connections forever
while (true) {
// Grab the next incoming connection
Socket s = ss.accept();
// Tell the world we've got it
System.out.println( "Connection from "+s );
// Create a DataOutputStream for writing data to the
// other side
DataOutputStream dout = new DataOutputStream( s.getOutputStream() );
// Save this stream so we don't need to make it again
outputStreams.put( s, dout );
// Create a new thread for this connection, and then forget
// about it
new VoiceServer( this, s );
// Get an enumeration of all the OutputStreams, one for each client
// connected to us
Enumeration getOutputStreams() {
return outputStreams.elements();
// Send a message to all clients (utility routine)
void sendToAll( byte[] voice ,Socket socket) {
// We synchronize on this because another thread might be
// calling removeConnection() and this would screw us up
// as we tried to walk through the list
synchronized( outputStreams ) {
// For each client ...
for (Enumeration e = outputStreams.keys(); e.hasMoreElements(); ) {
// ... get the output stream ...
Socket tmp=(Socket)e.nextElement();
if(!tmp.equals(socket))
try {
DataOutputStream dout = new DataOutputStream(tmp.getOutputStream());
// ... and send the message
dout.write(voice,0,44096);
dout.flush();
} catch( IOException ie ) { System.out.println( ie ); }
// Remove a socket, and it's corresponding output stream, from our
// list. This is usually called by a connection thread that has
// discovered that the connectin to the client is dead.
void removeConnection( Socket s ) {
// Synchronize so we don't mess up sendToAll() while it walks
// down the list of all output streamsa
synchronized( outputStreams ) {
// Tell the world
System.out.println( "Removing connection to "+s );
// Remove it from our hashtable/list
outputStreams.remove( s );
// Make sure it's closed
try {
s.close();
} catch( IOException ie ) {
System.out.println( "Error closing "+s );
ie.printStackTrace();
// Main routine
// Usage: java Server <port>
static public void main( String args[] ) throws Exception {
// Get the port # from the command line
int port = Integer.parseInt( args[0] );
// Create a Server object, which will automatically begin
// accepting connections.
new Server( port );
package com.longshine.voice;
import java.net.*;
import java.io.*;
import java.sql.*;
import java.io.*;
import java.net.*;
public class VoiceServer extends Thread
// The Server that spawned us
private Server server;
final int bufSize = 16384;
// The Socket connected to our client
private Socket socket;
// Constructor.
public VoiceServer( Server server, Socket socket ) {
// Save the parameters
this.server = server;
this.socket = socket;
// Start up the thread
start();
// This runs in a separate thread when start() is called in the
// constructor.
public void run() {
try {
// Create a DataInputStream for communication; the client
// is using a DataOutputStream to write to us
DataInputStream din = new DataInputStream( socket.getInputStream() );
byte[] voice=new byte[44096];
// Over and over, forever ...
while (true) {
// ... read the next message ...
// int bytes = din.read(voice,0,44096);
int bytes = din.read(voice);
// ... and have the server send it to all clients
server.sendToAll(voice,socket);
} catch( EOFException ie ) {
// This doesn't need an error message
} catch( IOException ie ) {
// This does; tell the world!
ie.printStackTrace();
} finally {
// The connection is closed for one reason or another,
// so have the server dealing with it
server.removeConnection( socket );
package com.longshine.voice;
import java.io.*;
import java.net.*;
public class Client {
private String host="";
private String port="";
private Socket socket;
private DataOutputStream dout;
private DataInputStream din;
private Capture capture=null;
private Play play=null;
public Client(String host,String port) {
this.host=host;
this.port=port;
public void init()
try
socket = new Socket( host, Integer.parseInt(port));
din = new DataInputStream( socket.getInputStream() );
dout = new DataOutputStream( socket.getOutputStream());
capture=new Capture(dout);
play=new Play(din);
catch(Exception e)
e.printStackTrace();
public static void main(String[] args) {
Client client = new Client("172.18.220.176","5678");
client.init();
if(args[0].equalsIgnoreCase("say"))
client.capture.start();
if(args[0].equalsIgnoreCase("hear"))
client.play.start();
package com.longshine.voice;
import java.io.*;
import java.util.Vector;
import java.util.Enumeration;
import javax.sound.sampled.*;
import java.text.*;
import java.net.*;
public class Play implements Runnable {
SourceDataLine line;
Thread thread;
String errStr=null;
DataInputStream in=null;
AudioInputStream audioInputStream;
final int bufSize = 16384;
int duration=0;
public Play(DataInputStream in)
this.in=in;
public void start() {
errStr = null;
thread = new Thread(this);
thread.setName("Playback");
thread.start();
public void stop() {
thread = null;
private void shutDown(String message) {
if ((errStr = message) != null) {
System.err.println(errStr);
if (thread != null) {
thread = null;
public void createAudioInputStream() {
if (in != null ) {
try {
errStr = null;
java.io.BufferedInputStream oin = new java.io.BufferedInputStream(in);
audioInputStream = AudioSystem.getAudioInputStream(oin);
} catch (Exception ex) {
ex.printStackTrace();
} else {
public void run() {
// reload the file if loaded by file
if (in != null) {
// createAudioInputStream();
// make sure we have something to play
// if (audioInputStream == null) {
// shutDown("No loaded audio to play back");
// return;
// reset to the beginnning of the stream
// try {
// audioInputStream.reset();
// } catch (Exception e) {
// shutDown("Unable to reset the stream\n" + e);
// return;
// get an AudioInputStream of the desired format for playback
AudioFormat format = getFormat();
audioInputStream=new AudioInputStream(in, format, AudioSystem.NOT_SPECIFIED);
AudioInputStream playbackInputStream = AudioSystem.getAudioInputStream(format, audioInputStream);
if (playbackInputStream == null) {
shutDown("Unable to convert stream of format " + audioInputStream + " to format " + format);
return;
// define the required attributes for our line,
// and make sure a compatible line is supported.
DataLine.Info info = new DataLine.Info(SourceDataLine.class,
format);
if (!AudioSystem.isLineSupported(info)) {
shutDown("Line matching " + info + " not supported.");
return;
// get and open the source data line for playback.
try {
line = (SourceDataLine) AudioSystem.getLine(info);
line.open(format, bufSize);
} catch (LineUnavailableException ex) {
shutDown("Unable to open the line: " + ex);
return;
// play back the captured audio data
int frameSizeInBytes = format.getFrameSize();
int bufferLengthInFrames = line.getBufferSize() / 8;
int bufferLengthInBytes = bufferLengthInFrames * frameSizeInBytes;
byte[] data = new byte[bufferLengthInBytes];
int numBytesRead = 0;
// start the source data line
line.start();
while (thread != null) {
try {
if ((numBytesRead = playbackInputStream.read(data)) == -1) {
break;
int numBytesRemaining = numBytesRead;
while (numBytesRemaining > 0 ) {
numBytesRemaining -= line.write(data, 0, numBytesRemaining);
} catch (Exception e) {
shutDown("Error during playback: " + e);
break;
// we reached the end of the stream. let the data play out, then
// stop and close the line.
if (thread != null) {
line.drain();
line.stop();
line.close();
line = null;
shutDown(null);
public AudioFormat getFormat() {
AudioFormat.Encoding encoding = AudioFormat.Encoding.ULAW;
String encString = "linear";
float rate = Float.valueOf("44100").floatValue();
int sampleSize = 16;
String signedString = "signed";
boolean bigEndian = true;
int channels = 2;
if (encString.equals("linear")) {
if (signedString.equals("signed")) {
encoding = AudioFormat.Encoding.PCM_SIGNED;
} else {
encoding = AudioFormat.Encoding.PCM_UNSIGNED;
} else if (encString.equals("alaw")) {
encoding = AudioFormat.Encoding.ALAW;
return new AudioFormat(encoding, rate, sampleSize,
channels, (sampleSize/8)*channels, rate, bigEndian);
} // End class Playback
package com.longshine.voice;
import java.io.*;
import java.util.Vector;
import java.util.Enumeration;
import javax.sound.sampled.*;
import java.text.*;
import java.net.*;
public class Capture implements Runnable {
TargetDataLine line;
Thread thread;
String errStr=null;
DataOutputStream out=null;
AudioInputStream audioInputStream;
final int bufSize = 16384;
int duration=0;
public Capture(DataOutputStream out)
this.out=out;
public void start() {
errStr = null;
thread = new Thread(this);
thread.setName("Playback");
thread.start();
public void stop() {
thread = null;
private void shutDown(String message) {
if ((errStr = message) != null) {
System.out.println(errStr);
if (thread != null) {
thread = null;
public AudioFormat getFormat() {
AudioFormat.Encoding encoding = AudioFormat.Encoding.ULAW;
String encString = "linear";
float rate = Float.valueOf("44100").floatValue();
int sampleSize = 16;
String signedString = "signed";
boolean bigEndian = true;
int channels = 2;
if (encString.equals("linear")) {
if (signedString.equals("signed")) {
encoding = AudioFormat.Encoding.PCM_SIGNED;
} else {
encoding = AudioFormat.Encoding.PCM_UNSIGNED;
} else if (encString.equals("alaw")) {
encoding = AudioFormat.Encoding.ALAW;
return new AudioFormat(encoding, rate, sampleSize,
channels, (sampleSize/8)*channels, rate, bigEndian);
public void run() {
duration = 0;
audioInputStream = null;
// define the required attributes for our line,
// and make sure a compatible line is supported.
AudioFormat format = getFormat();
DataLine.Info info = new DataLine.Info(TargetDataLine.class,
format);
if (!AudioSystem.isLineSupported(info)) {
shutDown("Line matching " + info + " not supported.");
return;
// get and open the target data line for capture.
try {
line = (TargetDataLine) AudioSystem.getLine(info);
line.open(format, line.getBufferSize());
} catch (LineUnavailableException ex) {
shutDown("Unable to open the line: " + ex);
return;
} catch (SecurityException ex) {
shutDown(ex.toString());
return;
} catch (Exception ex) {
shutDown(ex.toString());
return;
// play back the captured audio data
int frameSizeInBytes = format.getFrameSize();
int bufferLengthInFrames = line.getBufferSize() / 8;
int bufferLengthInBytes = bufferLengthInFrames * frameSizeInBytes;
byte[] data = new byte[bufferLengthInBytes];
int numBytesRead;
line.start();
try
while (thread != null) {
if((numBytesRead = line.read(data, 0, bufferLengthInBytes)) == -1) {
break;
if(data.length>0)
out.write(data, 0, numBytesRead);
out.flush();
catch (Exception e)
e.printStackTrace();
// we reached the end of the stream. stop and close the line.
line.stop();
line.close();
line = null;
// stop and close the output stream
try {
out.flush();
out.close();
} catch (IOException ex) {
ex.printStackTrace();
} // End class Capture

Voice chat using java rtp

hi
i got voice transmission and receiving in java rtp but some what delay is there
i tried reduce the delay but still i have problem
i tried with GSM_RTP,LINEAR,ULAW ,etc but still delay is there
any one help me please
source code is avaliable in :
http://javasolution.blogspot.com/2007/04/simple-application-for-voice.html

bendash wrote:
My questions are:
- Is it a good idea to implement a voice chat feature using the Java Sound API, something similar to the example above on the link?If you need to do the voice chat in Java for whatever reason, then yes...
- Is it possible to somehow fix that delay? if yes, then how?From what I saw from glancing at that code, it's transporting the audio streams via a TCP stream. TCP streams retransmit data when it's lost, which is actually something that you don't want in a real-time application. If you lose some packets with audio data, and those are retransmitted, your receiver is getting progressively more and more behind (because the audio stream has to wait for the missing bytes to arrive before it can continue.
For a simple application like yours, your best bet would be to divide the audio stream into buffer-sized chunks (1024 bytes might be a good buffer size), and transmit those in UDP packets. Make sure to add a packet number to the UDP packets. On the other end, just write some code so that out of order packets are ignored (so if packet 4 arrives after packet 6, for instance, you drop that packet rather than playing it after 6... so you'd get 123(silence)567...

Voice chat using Sound API?

Hi there,
I'm a university student, trying to find a way to create an application in java with voice chat feature. It will actually be a call center simulator app consisting of two parts, a server and a client part:
The multithreaded server manages the clients, and the JPA database;
The client's job is to login to the server, and then he'll get a randomly selected person's data and phone number by the server - in this case, IP address is the phone number, and the person is another available client. Then he can call that person, ask the questions regarding for example, a bank card (if it is a bank's call center), jot down the answers to a form, and then hang up; then the client will send said person's data to the server, who updates it in the database.
For the voice chat part, I want to use the Java Sound API, and I've found this example:
[Voice Chat Using Java|http://javasolution.blogspot.com/2007/04/voice-chat-using-java.html]
But although this example works, there's a delay of 1.5 - 2 seconds in the audio.
My questions are:
- Is it a good idea to implement a voice chat feature using the Java Sound API, something similar to the example above on the link?
- Is it possible to somehow fix that delay? if yes, then how?
Also, how would you imagine/structure a program like that?
Let me remind you that it's only a simulation, and we're not talking about actual phone-to-net calls or something like that; only LAN and internet calls, so clients should need no more than a microphone and a speaker to work with it, and also, the server shouldn't need extra hardware,too.
Thank you in advance for your replies,
Ben Dash
university student

bendash wrote:
My questions are:
- Is it a good idea to implement a voice chat feature using the Java Sound API, something similar to the example above on the link?If you need to do the voice chat in Java for whatever reason, then yes...
- Is it possible to somehow fix that delay? if yes, then how?From what I saw from glancing at that code, it's transporting the audio streams via a TCP stream. TCP streams retransmit data when it's lost, which is actually something that you don't want in a real-time application. If you lose some packets with audio data, and those are retransmitted, your receiver is getting progressively more and more behind (because the audio stream has to wait for the missing bytes to arrive before it can continue.
For a simple application like yours, your best bet would be to divide the audio stream into buffer-sized chunks (1024 bytes might be a good buffer size), and transmit those in UDP packets. Make sure to add a packet number to the UDP packets. On the other end, just write some code so that out of order packets are ignored (so if packet 4 arrives after packet 6, for instance, you drop that packet rather than playing it after 6... so you'd get 123(silence)567...

Google Voice Chat?

Are there any Mac IM clients that will allow me to have voice chats through Google talk?

You can't do audio chats from iChat to the Windows Google Talk client at this time.
iChat uses a custom system for audio chats, and the only client that speaks this system over XMPP (Jabber) is iChat.
The Google Talk client uses a system that, with some changes, is now a forthcoming standard called Jingle. All being well, on the 31st of October the Jingle standard will move forward and become a draft standard. After which Google should hopefully update the Google Talk client to use the new standard and other clients should also start to implement it. When iChat will do so no one outside Apple knows but, IMO, it will happen sooner or later.
Anyway, short version is: don't expect to be able to voice chat between iChat and the Gtalk client before Leopard is released (and possibly not even then).

Voice chat in Jabber messenger

Hi,everyone
I am developing the messenger application based on Jabber protocol in J2SE that provides the basic functionality of messenger plus whiteboad,audio\vedio chatting and conferencing , file transfering and desktop sharing.We are actually three persons working on this project along with one project leader.We are using Wildfire as Jabber server and mounted this server on Tomcat Apache.We have completed the chat,group chat and whiteboard.Now we are lookin for the right alternate for voice chat .So please tell me what should i suppose to do now I mean how java implements SIP,VOIP,SID like protocol OR Libjingle library provided by Google.
Please help me.
Sach Farmer

Java doesn't implement any of these. Some libraries written in Java do. Though J2SE has no standard library for either of those, I think. There might be 3rd party libs you can use - you already know Google, so I don't need to hint you at it.

3GS Voice Chat Application

Hey I'm looking for a specific voice chat application. I would like an app that would allow multiple users to join a chat room and talk via voice with each other on the iphone. I would like this app to also allow users on a PC to join into this voice chat with iphone users. I would also like to make the chat room private so only certain users can join the chat room. Is there an existing application that accomplishes this? I have searched around the internet and haven't found anything yet. Thanks.

Stebalien wrote:Cool! However, the key exchange system looks a little unwieldy; personally, I would give everyone a permanent "identity" key (preferably allow the user to a GPG key) and then use the socialist millionaire's protocol (SMP) to exchange these keys. Once the keys have been exchanged, they can be used to negotiate shared session keys. This way, once you talk to someone once, you don't need to keep manually sharing a key with them. The OTR library (libotr) does this very well but I don't know how usable it would be for this project (it's intended for layering encryption over existing IM protocols).
Really thanx for your interest, i refer to the main developer . Be free to come in #seren on irc.freenode.net , to talk directly with him and the community!

Can't seem to enable voice chat anymore

hello folks
i just upgraded to an audigy but now when my friend and i try to initiate voice chat through x-fire and msn we can't hear each other at all, where we had no problems before...
i've got a p4 3.6ghz with gb of ram and i've disabled my onboard sound card in the bios.
i've also tested my mic and speakers through the audio tab in control panel in xp.
any ideas?

actionthom,
In the Creative Mixer, in the REC panel, make sure you have Mircrophone selected. Move the slider to your volume preference. Click on the red "+" at the top and select 20dB boost. If you want your own speakers to play what you say into the mic, then in the Source panel, un-mute Microphone. Adjust that slider to your preference. It's usually a good idea to mute any other sources you don't want.
Also, in Control Panel, Sounds and MultiMedia (or something similar for your system), Audio tab, make sure your Audigy is selected as the preferred device for Playback, Recording, etc. If you have a "Use only preferred devices" box, check it.Message Edited by Katman on 0-30-2006 07:4 PM

Problem in audio formate voice chatting applet

hi
i've just finished making voice chatting project but the voice sometimes sent with big noice and i can't her the user in the other side
i make it as applet opend from the web and the connection is successfully established , i use cloudegarden in my project
the audio formate i use pcm 44100 hz 16 bit sterio in the client
and 11025 hz 16 bit sterio in the server , i was have to make this formate because the others not working will with me(it throw exception)
thanks for ur concern

Hello,
could you please send me the source code.Even i'm working on a similar project. My id is [email protected]
Thanks
PN

How to implement a chat scenario?

Hi all.
Can i implement a Chatting Scenario where more than 2 people are chatting so as to reach a decision.?

Shobhendra,
So I guess you want each "chat" line to be a separate task in the process, and this task keeps on looping until, say, a button "complete" is pushed by one of the task executors.
I would create a custom callable object for this (WebDynpro component implementing GP CO interface). It would be something like this:
WebDynpro UI showing the previous chat lines, and an input area for a new line.
Two buttons, one for submitting a chat line, one for completing the chat. For these two buttons, two result states will be defined.
The chat lines are stored using an entity service "Chat".
In the process layer you can use a postcondition loop block, in which you add a parallel dynamic block for your chatting users, and in that block you add your custom CO. The loop will start over with "chat" result state, and finish with "Complete".
Johan

Sound, voice chat, yahoo messenger and VPC 6

Okay perhaps off topic..perhaps not......how do I get sound to work in Yahoo messenger v 7 w/ voice chat via VPC 6 on an AL 15 Powerbook???
And does the AL 15 have a built in Microphone??

Does the microphone work while running VPC?
I don't know, but I think you can easily check. While you're running VPC, go into System Preferences > Sound > Input. (You can access System Preferences from the Apple menu in the upper left-hand corner of your screen. I'm assuming that you can do this while running VPC. If I'm wrong on this, please stop reading this worthless post. ;-))
Look at the meter that reads "input level," just above the slider that reads "input volume." If there's any significant ambient noise where you are, or if you speak at a decent volume out loud (it doesn't even have to be near the mic, which is located beneath the left speak grille), you should see the "input level" fluctuate if the mic's working properly. (The default setting for the "input volume" is midway on the slider. If it's all the way to the left, the mic will not pick up any sounds.)

USB webcam microphone not working with Starcraft 2 voice chat

=USB webcam microphone not working with Starcraft 2 voice chat?Windows 7, X-fi Fatalty Pro
I have a webcam with ?a built in microphone (Ps3 eye). ?It is connected by USB. ?The drivers are the CL-Eye drivers; a third party driver set since Sony does not directly support the eye for PC.
in the windows audio device management, the microphone appears as normal and is set as the default device. ?I can use the windows sound recorder to record me speaking just fine. ?However if I use any other applications it doesn't seem to work at all. ?I can select the device as the default recording device in Starcraft 2 as well as Teamspeak 3 but no sound is detected. ?The USB microphone does not show up as a selectable device in recording options in my Creative Control Panel. ?Disabling the default creative microphone does nothing.
I think the problem is in that windows can directly detect the microphone and so software that uses the windows audio device manager works fine, but anything that talks directly with my sound card software does not properly detect the microphone. ?Basically, I can select the device as a default device but it does not work.
Any thoughts on this or am I SOL and have to find myself a shiny new headset?

I had the same problem. You need to check the device index of your USB mic.
In my case. I'm on a Mac OSX 10.6 system. I had four devices cataloged. With the last one being the USB mic.
Then set like so in your AS code audioPub.microphoneManager.micIndex = 3;
Remember, that the indexing is 0 based.
The sound framework make the assumption that the index is 0.
Hope that helps.

Duriong Voice Chat Voice is not Receiving from Creative Sound Card but going correct

Hi!
I have recently faced a problem in my Creative Sounce Card. When i play a sound, no? sound is coming from sound card, No?error message is coming but monitor screen is displaying the sound animations in?Windows media player. I have also tested my speakers & connections and no problem found in it. I also changed the Creative Sound Card Software's settings to default but all in vain. Besides when i?unchecked?the check box ("Only Show Digital Sound") in the Creative Sound Card Software, the analog music is being received, but it is only music without any human voice. The same problem is during voice chat.
Plz help me in this regard.
Thanks in advance.

There is no confusion (anymore) I'm just trying to get the word out that nobody wants to supprt these OEM cards. Not you and not Dell. Does Dell even have the rights to redistibute the apps to work with there versions of your cards? Card works, Drivers Work, No ap
ps.
.see my delima? Just a heads up to anyone else with this problem. I've looked to no avail for a updated set of apps for this OEM card. Really kinda anoyed by this. I mean why can't creative support there own card. I know dell bought it, but it is creative and you made money from it support it. Seems pretty cut and dried to me. Digrunteld Axe

Whiteboard-Voice Chat archiving

Hi,
I am developing an application which uses 2 applets in a single jsp page one as a whiteboard where we can draw and another a voice chat cum text chat application.
I need to save both the drwaing and the chat content in the database and retreive and show it to user which contains the drawing and the voice chat content in sync.
How can this be done?Please advice me.
Thanks
Ram

Hi,
Creator 2.0 does not have support to create Applet. You could use free tools like netbeans (http://www.netbeans.org) to create the applet and then import it in to Creator.
RK.

Implementing voice chat

Similar Messages

Maybe you are looking for