Part Appendix 1 Noise Shapes | Meridian America Meridian 518

Appendix 1 – Noise Shapes	43

Part 3 Appendix 1 – Noise Shapes

The graphs in this appendix show the relative noise spectra in dB for the different shapers, compared with the flat-spectrum dither level for the same word-size.

Noise spectrum

20dB

0dB

-20dB

0Hz

5kHz

10kHz

15kHz

20kHz

25kHz

Above: noise spectrum using High-Pass additive TPDF dither at 44.1kHz

	10dB
spectrum	5dB
	0dB

Noise	-5dB
Noise
	-10dB
	-15dB	5kHz	10kHz	15kHz	20kHz	25kHz
	0Hz	5kHz	10kHz	15kHz	20kHz	25kHz

Above: noise spectrum for Shape A at 44.1kHz.

518 User Guide

Page 43

Image 43

Meridian America Meridian 518 manual Part Appendix 1 Noise Shapes

Contents

1992, 1993 Contents Appendix 4 -Resolution Enhancement Simple rules for usingAppendix 2 Hints on Mastering Acknowledgements Sales and service in the UKSales and service in the USA Designed & manufactured in the UK by Conventions used in this manual IntroductionAbout this manual About the 500 Series Connections Installing yourGeneral precautions Unpacking Whats inside a 518? Planning setup Overview as Preamp Type What else do I need to know? What about analogue sources? CD or LaserDisc playback improvement Overview as Resolution Enhancement Processor TypeMeridian DSP speaker improvement Meridian Surround improvement Overview as Multimedia Processor Type Overview as Mastering Processor Type ∙ Normal ∙ Standby ∙ Type ∙ Config Customising features Standby Switching onStarting off with Basic operation Out Adjusting the volumeOperating 518 as a Control Unit Type Selecting a source Shape B DitherFlat Shape a Display Advanced operation using the Remote Control Menu Keys Operating 518 as Resolution Enhancer TypeVolume control Muting the sound Operation summary With the Remote ControlMemory Customising 518, an overview Restoring default settingsConfig an overview Config control settings How to change to Type or Config How to customiseCustomising, general procedure Config sources and inputs Setting Type Controller Customising using TypeHow to change back to Normal Making changes to an existing setup Selecting Types Customising using ConfigHow to use Config Config Setting the Standby mode for Selecting the controller modeSetting the system address for Setting the product address for Setting the Volume display Setting the Blank display option forSetting the Emphasis option for Setting the Volume mode for Choosing source logos Setting up sourcesVol. dB Choosing the Comms type for a source product Changing the input for a sourceChoosing the address of a source product Digital output connection ConnectionsDigital audio connections Digital input connections Con Connecting to Meridian Digital speakersCommunications connections To connect to other Meridian 500 Series equipment Mastering Processor Part D1 +2 DescriptionAs a Mastering or Multimedia Processor Type Meridian 500 Comms warning ShpB +2 Emph +2 Making Recordings Transfer to the final carrier Transfer to editor Shaper Advantage 44.1kHz 48kHz Normal Pre-emphasis Noise shaper characteristics Dither Operating BackgroundTransparency in digital systems Digital Audio and Quantisation Dynamic Range Noise Shaping with ditherPre and De-emphasis Step up in dynamic range Simple rules for usingStep-down in sample word size No change in sample size Additional technical information Specification Help Maintenance & Service Cleaning Noise Part Appendix 1 Noise Shapes Above noise spectrum for Shape B at 44.1kHz 0Hz 5kHz 10kHz 15kHz 20kHz Requirements for D/A conversion Vulnerability of the signalAudible results of digital errors and editing Appendix 2 Hints on Mastering with noise-shaping Appendix 2 Hints on Mastering Handset Functions Appendix 3 RS232GoTo Functions Jitter and de-jittering Appendix 4 -Resolution Enhancement Frequency Dynamic-range Dynamic-range optimisation with Pre-emphasis Dynamic-range optimisation with Gain Showing CD pre- and de-emphasis curves Dynamic-range optimisation with Noise-shaped Dither DAC or channel enhancement by word-length matching DAC enhancement by using high-frequency dither Index Contents Index User Guide User Guide