SPDIF 5.1 compatible transmitter - diyAudio
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Old 9th November 2013, 07:15 AM   #1
glias is offline glias  France
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Default SPDIF 5.1 compatible transmitter

hello all,
I'm looking for a spdif transmitter which can support multichannel 5.1 format with 192kHz framerate.
Do you have any references to suggest me ?

regards
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Old 10th November 2013, 10:16 AM   #2
Julf is offline Julf  Europe
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Quote:
Originally Posted by glias View Post
I'm looking for a spdif transmitter which can support multichannel 5.1 format with 192kHz framerate.
The maximum speed of S/PDIF is 6Mbit/s. 6 channels of 192 kHz @ 16 bits is 18 Mbit/.s, @24 bits it would be 27 Mbit/s.
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Old 10th November 2013, 01:09 PM   #3
glias is offline glias  France
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Thanks for your reply, yes you're right,, so which digital interface do I need ? HDMI ?
does it exist HDMI transceiver, or better : HDMI tranceiver only for audio ?

regards
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Old 10th November 2013, 01:38 PM   #4
Julf is offline Julf  Europe
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Originally Posted by glias View Post
Thanks for your reply, yes you're right,, so which digital interface do I need ? HDMI ?
does it exist HDMI transceiver, or better : HDMI tranceiver only for audio?
I think we need more information about what you are trying to do. Send data, or receive?

Full-resolution audio on HDMI data is protected by HDCP encryption and not easily accessible.
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Old 10th November 2013, 02:37 PM   #5
glias is offline glias  France
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I'm looking for an interface to connect my audio design to an AV receiver ideally in digital (because I don't want to have DACs and CINCH connexions for each channels). My need is only to transmit audio data to the AV receiver.

Thanks a lot for your help.
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Old 10th November 2013, 07:00 PM   #6
Julf is offline Julf  Europe
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Quote:
Originally Posted by glias View Post
I'm looking for an interface to connect my audio design to an AV receiver ideally in digital (because I don't want to have DACs and CINCH connexions for each channels). My need is only to transmit audio data to the AV receiver.
Does your AV receiver have a HDMI input? If so, that is definitely the easiest solution.
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Old 11th November 2013, 09:23 AM   #7
glias is offline glias  France
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yes, I have a ONKYO AVR which have HDMI inputs... but you said that there is protection on HDMI ... does it exist chip wich could provide me audio interface (without video ...) ? or a chip with both, which could be interfaced with FPGA or P ?

regards
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Old 11th November 2013, 09:28 AM   #8
Julf is offline Julf  Europe
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Originally Posted by glias View Post
yes, I have a ONKYO AVR which have HDMI inputs... but you said that there is protection on HDMI ... does it exist chip wich could provide me audio interface (without video ...) ? or a chip with both, which could be interfaced with FPGA or P ?
The AVR should be able to decode the encrypted signal.
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Old 11th November 2013, 10:25 AM   #9
glias is offline glias  France
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OK, do you know HDMI chip that I can use with the FPGA ?
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Old 11th November 2013, 10:28 AM   #10
Julf is offline Julf  Europe
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OK, do you know HDMI chip that I can use with the FPGA ?
No, and I do think HDMI is beyond DIY. What kind of source are you trying to design?
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