494943

Meridian 518 Manual

53
Zoom out
Zoom in
Previous page
1/58
Next page
Appendix 4 –Resolution Enhancement 53
518 User Guide
such converters are used. Meridian has always used correct analogue de-
emphasis in its designs.
By wrapping 72-bit precision pre-emphasis and analogue de-emphasis
around a DAC, it effectively gains:
• one bit noise reduction
• two-bit increase in high-frequency resolution
• more than ten-fold (20dB) reduction of converter noise.
These are substantial gains and are clearly audible on a good system.
On some material, using pre-emphasis will raise the overall signal level to
give 'clip' messages. It is still a great step forward to use pre-emphasis
with some overall gain reduction. In other words, if using pre-emphasis on
a piece of music causes clipping, try using Emphasis with the gain
reduced to –2 or –3dB. You are still winning on resolution with most DACs
up to –6dB.
10Hz 100Hz 1kHz 10kHz
-20
0
20
40
60
80
100
dB spl
HP_Deem
HP
18
16
Figure 5. Showing the effect on audibility of the 518's High-
pass and Flat dithers. Also showing the noise reduction from
de-emphasis.
Dynamic-range optimisation with Noise-shaped
Dither
The section following page 37 describes some of the background to
noise-shaping.
Essentially noise-shaping works by an averaging method that is well
matched to human hearing. The noise-floor of the system is shaped by
moving energy from the mid-range – where listeners are most sensitive –
to high frequencies. A correctly designed noise-shaper allows the noise of
the channel to be made inaudible and allows resolution well below the
normal wordsize.
The diagram below shows how 518 can obtain inaudible noise and
effectively 20 bit resolution on a 16 bit CD!
… 53 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Meridian 518 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Meridian 518 in the language / languages: English as an attachment in your email.

The manual is 0,31 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info