Post by Bobpaule February 15, 2009 (1 of 8)
|
|
|
==============================================================================
From AVS:
"I have set my DV-980H to SACD DSD and my receiver is reporting only 44.1Khz audio. What gives?
This is not an error. According to the HDMI 1.2a specifications, the indicated sample frequency on the receiver will be 44.1kHz. As pulled from the documentation:
"For One Bit Audio streams, the value indicated by the SF bits shall equal the ACR fS value. For Super Audio CD, the SF bits are typically set to 0, 1, 0, to indicate a Sample Frequency of 2.8224MSamples/s (i.e. 64*44.1kHz)."
This is due to 8-channels of audio being available through HDMI at 8 bits per channel at 44.1KHz. The end bandwidth is 2.8224Mbits/second, which equates to 2.8224M 1-bit audio."
=============================================================================
Indeed my HDMI 1.3a Onkyo processor shows 44.1 kHz, so here is a bottleneck, as the DSD spec clearly shows frequencies from 20-100 kHz.
Never knew until today that while the Oppo sounded great, it downgraded the freq. to 41 because of the HDMI 1.2 standard. You live, you learn, they say :)
I have the Onkyo on the way, will post about findings and real life versus perceived gains from the potential removal of the 44.1 kHz bottleneck. BTW The manual lists ,n50 KHz as the upper limit for SACD frequency, but i suspect it applies when the player does the decoding only. I will let you know.
http://www.onkyousa.com/model.cfm?m=DV-SP506&class=DVD&p=i
|
|
|
Post by raveer February 16, 2009 (2 of 8)
|
|
The sound of both units is not downsampled. You still get the 2.8MHz stream. It is just divided into 8 channels of 8 bit wide samples sampled at 44.1kHZ. If you multiply this info you get 64*44.1 which is exactly 2.8224MHz - the native resolution of DSD.
The quoted oppo anwser explains exactly that. In order to pass 2.8MHz stream, the HDMI folks had to come up with an idea - carrier frequency would stay at 44.1 and it would transport 8 bits of data over 8 channels simultaniously. This was materialized within the 1.2a spec. That also is why you need both, sender and receiver to support at least 1.2a spec if you want to transport DSD over HDMI. As the receiver must be able to dissect this data stream into 1-bit DSD.
If a receiver does not comply with 1.2a spec then you can not transport DSD. Your only option is DSD converted to PCM (24/88.2 is a common option).
|
|
|
Post by braver February 16, 2009 (3 of 8)
|
|
Both look like nice HDMI players. Now what's a good amp to go with those?
|
|
|
Post by Bobpaule February 17, 2009 (4 of 8)
|
|
UPDATE: Thx. to Raveer and folks at AVS i realized the futility of my post.
Basically DSD bit for bit is still transmitted, furthermore this player is also HDMI 1.2.
Still, for $135 banged box deal at Amazon Warehouse Deals it would make a good choice.
Keeping the Oppo, getting a second one for backup to have when the format becomes extinct, no not for me, SACD has been and will continue to be one my best companions.
|
|
|
|
|
|
Can someone (user/test) provide comments on the Onkyo DV-980H w/HDMI1.2 ? Does it really downgrade to 44.1KHZ (PCM? splitDSD?). I can imagine it is in a complete different league if compared to SONY5400ES w/ HDMI1.3. Anyone can comment, please ?
|
|
|
|
|
|
Michelten said:
Can someone (user/test) provide comments on the Onkyo DV-980H w/HDMI1.2 ? Does it really downgrade to 44.1KHZ (PCM? splitDSD?). I can imagine it is in a complete different league if compared to SONY5400ES w/ HDMI1.3. Anyone can comment, please ?
Please read the posts above.
HDMI 1.2 is adequate to transmit a (full resolution) DSD bitstream.
Also, if the receiver says 44.1kHz, this is not a downgrading or downsampling. The 44.1kHz is a terms used commonly in PCM technologies that refers to the number of samples taken per second of a sound. As DSD is a 1-bit technology, the sampling rate means something different. Be assured, if the receiver says 44.1kHz, it is the full resolution.
Unless of course, it is I who is confused??!!
|
|
|
|
|
|
"For One Bit Audio streams, the value indicated by the SF bits shall equal the ACR fS value. For Super Audio CD, the SF bits are typically set to 0, 1, 0, to indicate a Sample Frequency of 2.8224MSamples/s (i.e. 64*44.1kHz)."
This is due to 8-channels of audio being available through HDMI at 8 bits per channel at 44.1KHz. The end bandwidth is 2.8224Mbits/second, which equates to 2.8224M 1-bit audio."
As the author of those immortal words (rephrased from Oppo's email to me), it is meant to say the there is no downsampling (the output is full-bandwidth) and it is meant to explain why the display says 44.1.
Kal
|
|
|
Post by JeffR714 December 20, 2013 (8 of 8)
|
|
FunkyMonkey said:
Please read the posts above.
HDMI 1.2 is adequate to transmit a (full resolution) DSD bitstream.
Also, if the receiver says 44.1kHz, this is not a downgrading or downsampling. The 44.1kHz is a terms used commonly in PCM technologies that refers to the number of samples taken per second of a sound. As DSD is a 1-bit technology, the sampling rate means something different. Be assured, if the receiver says 44.1kHz, it is the full resolution.
Unless of course, it is I who is confused??!!
Thanks for clearing this up for me as well
|
|
