I had a silly idea the other day about using my Denon DVD-757 in combination with a Xilinx Spartan 3an starter kit to send the raw PCM/DSD data over ethernet to a computer.
Well apparently this idea got out of hand and is now semi-successful.
Initially I thought I would have to solder leads to the PQFP chip (the BB DSD1608 part) in order to recieve the PCM and DSD data. Apparently there exists a through-hole copper connector for the following:
_PCM_
PDATA1 (all 4 stereo serial connections)
PDATA2
PDATA3
PDATA4
PBCK (pcm bit clock)
PLRCK (left/right pcm clock)
_DSD_
DSD1-8 (1-bit for each channel)
DBCK (dsd clock)
Ive tested each of these connections in Chipscope Pro and they are all valid depending on what type of disc I'm playing.
Heres a crappy shot of the PCM section with labeled pins:
(sorry about the image size)
I plan on connecting all pins for pcm and designing a vhdl module for transmitting the data to the ethernet interface. On the PC side, I will used winpcap in c++ to grab the raw data so I don't have to worry about the headers and latency.
Another gratuitous fun shot:
Anyone have an opinions/ideas?
Well apparently this idea got out of hand and is now semi-successful.
Initially I thought I would have to solder leads to the PQFP chip (the BB DSD1608 part) in order to recieve the PCM and DSD data. Apparently there exists a through-hole copper connector for the following:
_PCM_
PDATA1 (all 4 stereo serial connections)
PDATA2
PDATA3
PDATA4
PBCK (pcm bit clock)
PLRCK (left/right pcm clock)
_DSD_
DSD1-8 (1-bit for each channel)
DBCK (dsd clock)
Ive tested each of these connections in Chipscope Pro and they are all valid depending on what type of disc I'm playing.
Heres a crappy shot of the PCM section with labeled pins:
An externally hosted image should be here but it was not working when we last tested it.
(sorry about the image size)
I plan on connecting all pins for pcm and designing a vhdl module for transmitting the data to the ethernet interface. On the PC side, I will used winpcap in c++ to grab the raw data so I don't have to worry about the headers and latency.
Another gratuitous fun shot:
An externally hosted image should be here but it was not working when we last tested it.
Anyone have an opinions/ideas?
Success on capture of the pcm data from the player:
An externally hosted image should be here but it was not working when we last tested it.
Looks like I went and nuked my spartan3... Waiting for a replacement board. Should give me time to write a vhdl module for buffering and transmitting data to ethernet. 
There are lots of software tools to work with PCM data available. But what can you do with DSD? Are there tools available to work with DSD?
Since a DVD ROM drive won't recognize a SACD, I have never had the chance to edit or manipulate DSD data.
Since a DVD ROM drive won't recognize a SACD, I have never had the chance to edit or manipulate DSD data.
This is true, I don't think many people have had the opportunity to work with DSD yet. I think the simplest way to do this is to use a low-pass (averaging) filter followed by decimation of 64. I am assuming all DSD signals are 44.1khz x 64 = 2.822mhz, but I am probably mistaken. The bit resolution could probably be varied depending on how the filter is implemented.
I found a nice website that goes over alot of the basics:
http://www.beis.de/Elektronik/DeltaSigma/SigmaDelta.html
I found a nice website that goes over alot of the basics:
http://www.beis.de/Elektronik/DeltaSigma/SigmaDelta.html
- Status
- Not open for further replies.