Support and General Use > Recording
Optical Line in recording - creating separate tracks
Rincewind:
a short search on google returned this:
http://www.epanorama.net/documents/audio/spdif.html
This page has quite a good specification of the spdif format. I haven't read everything but it also mentions some user bits in the stream. It is possible that those are used to mark tracks.
http://lalists.stanford.edu/lau/2002/11/0278.html
A mailing list post. not much information here. We could try to contact this Bob Caine. Maybe he has some more info to pass on.
LinusN:
The track index seems to be embedded in the User Channel data. I have not yet found a good description of it though. The MCF5049/50 controller (iriver H1xx/H3xx and iAudio X5/M5) can extract the User Channel, but it seems a little involved.
Rincewind:
--- Quote from: LinusN on December 11, 2007, 06:30:13 AM ---The track index seems to be embedded in the User Channel data. I have not yet found a good description of it though. The MCF5049/50 controller (iriver H1xx/H3xx and iAudio X5/M5) can extract the User Channel, but it seems a little involved.
--- End quote ---
I found a description of the user channel data format!
it is in the datasheet of the AD1892 Chip on page 16
www.analog.com/UploadedFiles/Data_Sheets/AD1892.pdf
edit:
I had a look at the MCF5049 data sheet (page 296ff). The Q-Channel of the User Channel (where the track number is in) is stored in a special register (QChannelRecieve). Reading this register periodically or interrupt driven and extracting the track number from there should be possible. I don't know anything about this low level C programming and I don't want to kill my player with it, otherwise I would be very tempted to try to implement this.
keuleJ:
Hi, this would be a very nice feature to record from DVDs.
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