Garbage collector and JPEG decoder

Question

Hi,
I have a problem with the garbage collector decoding JPEG images received on a TCP socket. The process works but each time that I have to decode an image I have to create a new decoder, this causes that the garbage collector starts to work constantly looking for memory. When the gc starts to work the streamed images almost stop since the gc takes all the process.
Here is the code that has the problem. On this code you can see that I create a new ByteArrayInputStream and a MediaTracker, but I know how reuse this objets, the problem is on the decoder.
Does any one have an idea of how to solve it?
Thanks
public void cargarImagen(Visualizador vision,
                              Cabecera cabImg,
                              boolean completa,
                              boolean grabar,
                              boolean pantCIF,
                              JFrame1 jf1)throws Exception{
        Visualizador aux;
        ByteArrayInputStream byis = new ByteArrayInputStream(s1.buffer);
        try{
                decoder=JPEGCodec.createJPEGDecoder(byis);
                try{
                       // decode
                                               vision.image_Webcam=decoder.decodeAsBufferedImage();
                }catch(ImageFormatException b){
                  System.out.println("Incorrect image format");
                }catch(Exception a){
                  System.out.println("Incorrect image");
                mediaTracker_track = new MediaTracker(vision);
                mediaTracker_track.addImage(vision.image_Webcam, 0);
             mediaTracker_track.waitForID(0,500);
        }finally{
                  byis.close();
        if(mediaTracker_track.statusID(0, false) == MediaTracker.COMPLETE){
              vision.repaint();
         else{    /* incorrect image */
              vision.image_Webcam = null;
              System.out.println("Discarded image");
}

Answer 1

I think that this is not the case. Images come from a TCP connection and the application start to read the next image from the socket when the previous one has been decoded and painted.
So, images are not stored on memory and the received images rate depens on how fast is the application reading images from the socket.
However, it is a good idea to start gc before getting next image, the average rate will decrease but it will avoid the "jumps" on visualization.