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• lg gh22lp20
Question by pfcruiser, Thursday 14th of August 2008 19:58
will not burn right at speeds over 8x.at 8x burns great.is there any firmware to get the speed up and burn good?
Answer by Arachne, Thursday 14th of August 2008 20:03
Welcome to CDF

What do you mean by "will not burn right"? Do you get burn failures when burning at higher speeds, or something else?

What media are you using? LG drives can be picky in that they like to be fed good stuff, in my experience.
Answer by pfcruiser, Thursday 14th of August 2008 20:29
verbatim 16x dvd-r 4.7gb.at the end of dics movies stop and start over and over.
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• How to interfere the burning process
Question by skyvn, Friday 8th of August 2008 11:32
Hello,

I am sorry if this question is not in the right place. I am now in urgent state of having to figure out how to interfere the writing process of a CD-Writer or DVD writer.

As you known, the CD-Writer always write EFM signal onto the CD-data layer.
The question is how to interfere this process by our own signals.

Our job is to write a special Hologram Pattern on the CD surface. That pattern cannot be done by normal burning process of EFM singals. Hence we need to interfere this process.

Some more question:

There are so many things should be considered when we are on the way finding how to solve the problem as mentioned above.

1. How to start the burning process
2. Do we need to control Cd-motor speed, the Pickup Head moto speed or we can let the CD-driver control itself if it possible, how?
3. How to find the starting/ending point of the CD-pregrove spiral
4. ....


Thank you very much in advance ...
With best regards,
T.Q. Hoai

PS: if you have any document pls inform me by hoaitq at icu.ac.kr
Answer by eric93se, Friday 8th of August 2008 18:52
Do you intend to use a medium other than a CD?
Answer by skyvn, Saturday 9th of August 2008 16:43
eric93se said:
Do you intend to use a medium other than a CD?


Hello,

Thank you very much for your response.
I think I would be more clear if you read the paper "Production of computer-generated holograms on recordable compact disk media using a compact disk writer".
Pls download it here:
http://psp.icu.ac.kr/adminUploads/Files/Production_of_computer_generated_holograms_on_recordable_compact_disk_media_using_a_compact_disk_writer.pdf

In this paper, the authors succeeded to write a hologram pattern on the CD-R by interfere the burning process.

Pls take a glance on the paper and you will understand my question.
I am sorry if it take your time.

Best regards,
T.Q. Hoai
Answer by eric93se, Saturday 9th of August 2008 18:20
skyvn said:
[qanda]

1. How to start the burning process
2. Do we need to control Cd-motor speed, the Pickup Head moto speed or we can let the CD-driver control itself if it possible, how?
3. How to find the starting/ending point of the CD-pregrove spiral
4. ....




Well I give a stab at the first. To start the burning process tell the drive to write a small image file of data, after the drive does its calibration is when you would interupt that bogus data and insert your EFM signal, via an "analog switch". You can use any burning software like Nero to tell the drive to burn the image file.

So whats this project for? Senior Eng project?
Answer by skyvn, Saturday 9th of August 2008 19:09
eric93se said:
Well I give a stab at the first. To start the burning process tell the drive to write a small image file of data, after the drive does its calibration is when you would interupt that bogus data and insert your EFM signal, via an "analog switch". You can use any burning software like Nero to tell the drive to burn the image file.

So whats this project for? Senior Eng project?



Sorry, the Hologram image cannot be created by EFM signals, It should be done by PWM (pulse with modulation).
That's why the author used the analog switch to switch between EFM and PWM signals.

Because the information in the paper is not clear enough for us to follow.
Now we are trying to find how to trigger the CD-Drive to start its automatic burning process. And we just simply replace the EFM signals by our PWM signals when we want.
Could you pls tell me how to do so?

are there any free source codes or document to guide ?

The aim of this project is for making any hologram patterns on the CD-R surface.

Thank you very much for your kind and quick responses.
Answer by Bob, Saturday 9th of August 2008 19:59
I think you would get more help in this forum. Maybe a mod will move it for you > http://club.cdfreaks.com/f52/
Answer by eric93se, Saturday 9th of August 2008 20:37
skyvn said:

Now we are trying to find how to trigger the CD-Drive to start its automatic burning process. And we just simply replace the EFM signals by our PWM signals when we want.



Did you try contacting the author? Another person that might not mind answering some questions would be LighteningUK, This is his website.

But without having some advanced knowledge of how the cd burner works, I could only suggest dissasembling the burner and finding which pins are responsible for sending the final data stream to the OPU, then splicing into them to feed the new signal which would be triggered by the calibration signals. To get the drive to start sending the signal it would have to still be connected to a computer and still be capable of burning a normal disc to make sure its still operational after modifying it. You can use any burning software program like Nero or even IMGburn to initialize the burning process.

Did you get diagrams for all the IC's in the ODD?
Answer by skyvn, Monday 11th of August 2008 08:55
eric93se said:
Did you try contacting the author? Another person that might not mind answering some questions would be LighteningUK, This is his website.

But without having some advanced knowledge of how the cd burner works, I could only suggest dissasembling the burner and finding which pins are responsible for sending the final data stream to the OPU, then splicing into them to feed the new signal which would be triggered by the calibration signals. To get the drive to start sending the signal it would have to still be connected to a computer and still be capable of burning a normal disc to make sure its still operational after modifying it. You can use any burning software program like Nero or even IMGburn to initialize the burning process.

Did you get diagrams for all the IC's in the ODD?


Sorry, currently I don't have diagrams for all the IC's in the ODD.
I am trying to contact the manufacture and waiting for their response.

I think your suggestion is valuable if we can know the relative position between the Pickup Head and the CD.

In the paper, the author used one optosensor. For my understanding that's sensor is just for checking angle not for cheking radial distance.
Could you pls tell me how?
Thank you very much...
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• Burned DVDs not playing in standalone player
Question by cbuck78, Monday 7th of July 2008 03:58
I have a new LG-GH22NP20 DVD burner that is burning DVDs but they are unable to play on my standalone dvd players. I previously owned an LG GSA-4163B in my old computer which worked flawlessly, perfect dvds every time, no coasters. New Computer Setup: Gateway GM5632E w/ Vista Home Premium. When I purchased my new computer it came with an Optiarc 7173A burner which burned DVDs but also would not play them on my standalone, thought the problem was the burner so I purchased the new LG-GH22NP20, but I am still having the same problem: unable to play burned DVDs on my standalone. I use DVD Shrink 3.2 w/ Nero 8 for burning. All settings on DVD Shrink seem to be identical to the setup on my old computer. I am using the same discs I have used in the past Ritek dvd-r media. I was hoping someone out there would have some advice on how to solve this problem, please help!

Thanks,

Chris
Answer by Kerry56, Monday 7th of July 2008 04:22
It may be that the Ritek disks you are using were more compatible with your older burner than either of the newer ones. Ritek blank media is not held in high esteem around here.

First thing to try is burning at a slower speed...8x if your disks are rated at 16x. Next would be getting better blank disks. We generally advise people to get Verbatim 16x media. Burn it at 8x or 12x and you should get excellent results.

Taiyo Yuden 8x +R media (found online at Rima.com or supermediastore.com) is another good choice. It can be burned at its rated speed with no problems.

Another possible track to take is to use +R media and bitset it to look like a dvd-rom to your player. This should improve compatibility. Not sure how you would do this with Nero, but ImgBurn can change the booktype (bitset) with LG drives. Maybe someone else will chip in on a way to do this with Nero 8....I gave up on Nero at the 7th incarnation.
Answer by jeff53404, Monday 7th of July 2008 13:09
Maybe someone else will chip in on a way to do this with Nero 8


The first screen shot is Nero Burning ROM and the second is Nero Vision 5.

While Nero 8 is a significant improvement over previous versions, there does not appear to be a consistent method for finding "Book Type Setting" for the various programs within the suite.
Answer by MysticEyes, Monday 7th of July 2008 20:58
I don't know why you guys are pushing the OP to go with +R. He noted that his standalone worked fine with -R (as all players with having do).
Answer by Kerry56, Monday 7th of July 2008 21:05
I didn't push +R. In fact, if you look at my response, my first bit of advice was to slow down his burn speed on his current media. Then I said buy Verbatim (no recommendation of +R or -R included).

I believe the 8x TY +R to be better than the 8x -R in quality, so I mentioned that as an alternative. And bitsetting is just another thing to try.

Arguably, a +R bitset to dvd rom is as compatible or more so than -R.
Answer by harley2ride, Monday 7th of July 2008 21:22
I agree with Kerry..
I happen to have 1 dvd player that will only play +r, and one will only play -R, so I just bitset +r to avoid hassles.. It all boils down to the end use...
Answer by cbuck78, Saturday 12th of July 2008 21:42
How do you bitset. I have some Maxwell 8x DVD +R blank dics that I would like to try out, they are the disc's that did not want to work in my old LG burner, so they are sitting around collecting dust, I figure why not try it. Please provide step-by-step details on how to bitset. Also, will bitsetting void my warranty?

Thanks,

Chris
Answer by jeff53404, Saturday 12th of July 2008 22:04
Bitsetting (AKA Booktyping) affects the disc, not your drive and there is no reason to think it will affect your warranty. You might be thinking of changing your firmware which might impact on your warranty, especially if something goes wrong during the flashing.

I provided some information in my earlier post using Nero and Kerry56 mentioned you could use the program imgburn. Hopefully, the screen shots will get you going.


By the way, Bitsetting is not a guarantee or a miracle cure but it does increase the possibility that your disc will play, especially on an older model.
Answer by troy512, Sunday 13th of July 2008 07:10
please try anydvd
http://club.cdfreaks.com/f88/

or dvdfab.
http://club.cdfreaks.com/f116/

as dvdshrink is no longer updated for current copy protections.

please use quality dvd media such as YUDEN T02 or TYG02, as i have used many other media TY is all i trust
http://www.supermediastore.com/taiyo-yuden-silver-thermal-8x-dvd-plus-r-media.html
http://www.supermediastore.com/taiyo-yuden-silver-thermal-8x-dvd-r-media.html
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• Lg-gh22l
Question by unnamedsos, Friday 4th of July 2008 20:44
does it burn safedisc 4 ??? i don't want it to be 1 : 1 as long as the files don't get corrupted !!
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• Lg-gh22l
Question by unnamedsos, Friday 4th of July 2008 20:44
does it burn safedisc 4 ??? i don't want it to be 1 : 1 as long as the files don't get corrupted !!
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