The bars are part of the image, the camera does not shoot 16:9, you can do a electronic conversion with the squeeze setting or letterbox setting gives you the 16:9 look but in a 4:3 frame. Most software solutions will soften the image, and depending on focus and exposure it can go really bad really quickly.
Taking the hardware suggestion a bit more indepth, I have had great success using a 2 AJA system. The footage is just capture as is (4:3) into System one via FW. Then System with a Kona Card plays the 4:3 footage out with a SD to SD conversion set to Anamorphic (this is removing the black bars). Then system to with a Io or any other SDI capture device is set to capture SD as anamorphic. These are the files you use. This will give you the best quality and it is super fast (real time of course).