Fix for Ghosting and Single Frame Delay (upside down) on Glasses
I recently came accross an old post which describes a bit of DIY circuitry which can be used to delay the stereo signal of a vesa cable such as the one used for 3d vision.
I recently came accross an old post which describes a bit of DIY circuitry which can be used to delay the stereo signal of a vesa cable such as the one used for 3d vision.
[quote name='paulrichmond' post='1001608' date='Feb 15 2010, 11:13 AM']I recently came accross an old post which describes a bit of DIY circuitry which can be used to delay the stereo signal of a vesa cable such as the one used for 3d vision.
Has anyone had any success if building one of these to either inverse the stereo signal or to remove ghosting?
Paul[/quote]
I have played arounf with similar concepts (using a PLL circuitry for getting an non-interupting triggerded 50% trigger and a 55 for delay). What I can say after tedious testing is, that you will be able to shift the signal way to and above L/R swap with proper dimensioning the circuitry, so, yes, frame shift casn be achieved, also a reduction of ghosting caused by frame delays/picture processing such as overdrive in the monitor/projector. It CANNOT solve the up/down ghosting since this is caused by time delay across one frame processing. This problem ONLY could be solved if nvidia decided to give controll over duty cicle in the drivers, since there would have to be a certain time at frame transition wher both eyes need to be shut - not possible with external circuitry....
[quote name='paulrichmond' post='1001608' date='Feb 15 2010, 11:13 AM']I recently came accross an old post which describes a bit of DIY circuitry which can be used to delay the stereo signal of a vesa cable such as the one used for 3d vision.
Has anyone had any success if building one of these to either inverse the stereo signal or to remove ghosting?
Paul
I have played arounf with similar concepts (using a PLL circuitry for getting an non-interupting triggerded 50% trigger and a 55 for delay). What I can say after tedious testing is, that you will be able to shift the signal way to and above L/R swap with proper dimensioning the circuitry, so, yes, frame shift casn be achieved, also a reduction of ghosting caused by frame delays/picture processing such as overdrive in the monitor/projector. It CANNOT solve the up/down ghosting since this is caused by time delay across one frame processing. This problem ONLY could be solved if nvidia decided to give controll over duty cicle in the drivers, since there would have to be a certain time at frame transition wher both eyes need to be shut - not possible with external circuitry....
[url="http://www.mtbs3d.com/phpBB/viewtopic.php?f=26&t=25"]http://www.mtbs3d.com/phpBB/viewtopic.php?f=26&t=25[/url]
Has anyone had any success if building one of these to either inverse the stereo signal or to remove ghosting?
Paul
http://www.mtbs3d.com/phpBB/viewtopic.php?f=26&t=25
Has anyone had any success if building one of these to either inverse the stereo signal or to remove ghosting?
Paul
[url="http://www.mtbs3d.com/phpBB/viewtopic.php?f=26&t=25"]http://www.mtbs3d.com/phpBB/viewtopic.php?f=26&t=25[/url]
Has anyone had any success if building one of these to either inverse the stereo signal or to remove ghosting?
Paul[/quote]
I have played arounf with similar concepts (using a PLL circuitry for getting an non-interupting triggerded 50% trigger and a 55 for delay). What I can say after tedious testing is, that you will be able to shift the signal way to and above L/R swap with proper dimensioning the circuitry, so, yes, frame shift casn be achieved, also a reduction of ghosting caused by frame delays/picture processing such as overdrive in the monitor/projector. It CANNOT solve the up/down ghosting since this is caused by time delay across one frame processing. This problem ONLY could be solved if nvidia decided to give controll over duty cicle in the drivers, since there would have to be a certain time at frame transition wher both eyes need to be shut - not possible with external circuitry....
http://www.mtbs3d.com/phpBB/viewtopic.php?f=26&t=25
Has anyone had any success if building one of these to either inverse the stereo signal or to remove ghosting?
Paul
I have played arounf with similar concepts (using a PLL circuitry for getting an non-interupting triggerded 50% trigger and a 55 for delay). What I can say after tedious testing is, that you will be able to shift the signal way to and above L/R swap with proper dimensioning the circuitry, so, yes, frame shift casn be achieved, also a reduction of ghosting caused by frame delays/picture processing such as overdrive in the monitor/projector. It CANNOT solve the up/down ghosting since this is caused by time delay across one frame processing. This problem ONLY could be solved if nvidia decided to give controll over duty cicle in the drivers, since there would have to be a certain time at frame transition wher both eyes need to be shut - not possible with external circuitry....