I can understand that you can download a new F/W via a cable between your PC and an electronical device having a port such as USB/RS232. But for a DVD player, like my Denon 1920, it looks like reading a CD with the latest F/W could do the job. So is it just matter to put the CD in the player and everything will be update right away? The player detect the F/W file store on disk and then know what to do with it. What the format of the file? Binary? What the extension? .bit? Or do you have to put the CD in a PC, then connect the PC to your DVD player and send the file. Thanks for your help.