1. Manuals
  2. Brands
  3. Linear Acoustic Manuals
  4. Music Equipment
  5. LA-5100-DTV
  6. User manual

Linear Acoustic LA-5100-DTV User Manual

Dtv audio/loudness manager
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
AERO.one
DTV Audio/Loudness Manager
Model LA-5100-DTV+ (5.1-channel)

User Guide

Advertisement

Table of Contents
loading

Related Manuals for Linear Acoustic LA-5100-DTV

Summary of Contents for Linear Acoustic LA-5100-DTV

  • Page 1: User Guide

    AERO.one DTV Audio/Loudness Manager Model LA-5100-DTV+ (5.1-channel) User Guide...
  • Page 3 AERO.one DTV Audio/Loudness Manager Model LA-5100-DTV+ (5.1-channel) User Guide Release Date: February, 2011 Software Version: 00.01.05 and later Linear Acoustic Inc. Phone: 717-735-3611 FAX: 717-735-3612 Web: www.LinearAcoustic.com...

  • Page 4: Warranty Information

    Linear Acoustic or its agents have been advised, orally or in writing, of the possibility of such damages. This product contains Audyne dynamic range processing and is manufactured under license.

  • Page 5: Table Of Contents

    Linear Acoustic AERO.one User Guide Table of Contents List of Figures ............................ix Chapter 1: Introduction ........................5 Principles of Operation..................5 Location of AERO.one ..................6 Reference Levels .....................6 Chapter 2: Connections and Quick Setup ...............7 Unpacking and Inspection ..................7 Installation .......................7 Rear Panel ........................8...
  • Page 6 Linear Acoustic AERO.one User Guide Setup Menu......................23 Presets - See Chapter 5 ..................24 I/O Menu ......................24 4.5.1 Master Bypass ..................24 4.5.2 GPI Control (Flashing “g”) ..............24 4.5.3 GPI Function (GPI 1-4) ..............24 4.5.4 GPI Preset (GPI 1-4)................24 4.5.5 Upmixing ....................24 4.5.6...
  • Page 7 Linear Acoustic AERO.one User Guide 6.1.6 Nielsen Watermark Issues..............43 6.1.7 Problems with EAS decoding ............43 Chapter 7: Specifications ......................45...
  • Page 8 Linear Acoustic AERO.one User Guide viii...

  • Page 9: List Of Figures

    Linear Acoustic AERO.one User Guide List of Figures Audio Block Diagram .........................6 Rear Panel .............................8 AERO.one general application ......................12 AERO.one within a typical AC-3 distribution system (FOX, PBS) ..........14 AERO.one in a typical baseband PCM system (i.e. ABC, NBC)..........15 AERO.one in a typical HD/SD-SDI environment (CBS and others) ........16...
  • Page 10 Linear Acoustic AERO.one User Guide...

  • Page 11: Chapter 1: Introduction

    Digital (AC-3) encoder for 5.1 and stereo audio Principles of Operation The AERO.one is a simplified version of the Linear Acoustic AERO.air series of trans- mission loudness managers. It contains the same integrating long-term loudness controller, multiband short-term loudness controllers, UPMAX upmixing engine, and automatic, metadata, and GPI control Specific processing presets and adjustments are discussed in Chapter 5.

  • Page 12: Location Of Aero.one

    Linear Acoustic AERO.one User Guide Introduction AERO.one (DTV) 1/2 LfRf LfRf UPMAX® 2-to-5.1 AEROMAX® w/AutoMAX-II Loudness Ctrl C/Sw 3/4 C/LFE And DRC Engine Ls/Rs 5/6 Ls/Rs DN Apply LoRo/ LtRt LoRo/LtRt Enc. Bypass/ EAS In Out 1/2 MD Input Dolby Digital...

  • Page 13: Chapter 2: Connections And Quick Setup

    IEC power cords (style matches country of order); • this manual, and a handy black pen. • Warranty information: Please fill out and return the warranty card to Linear Acoustic to ensure your software and documentation are kept up to date. Installation AERO.one installation requires: •...

  • Page 14: Rear Panel

    Linear Acoustic AERO.one User Guide Connections and Quick Setup Rear Panel The rear panel of the AERO.one contains its electrical I/O. 2.3.1 Connection Ports All of the connections for AERO.one are on the rear panel and are described in detail be- low.

  • Page 15: Quick Setup Notes

    Encoder B Output: AC-3 output of the 2.0 channel Dolby Digital encoder option Quick Setup Notes The Linear Acoustic AERO.one is configured at the factory and is ready to go on the air after making the proper input and output connections and determining if upmixing is de- sired.
  • Page 16 Linear Acoustic AERO.one User Guide Connections and Quick Setup...

  • Page 17: Chapter 3: Applications

    Linear Acoustic AERO.one User Guide Chapter 3: Applications The AERO.one is intended to be used in an emission (transmission) environment. This chapter discusses several applications, including describing how it can be used to support three common US terrestrial network configurations: •...

  • Page 18: Aero.one General Application

    Linear Acoustic AERO.one User Guide Applications AERO.one Typical Local Station Installation Local DTV Local NTSC Network IRD Existing Local TV Plant Network Feed HD Video 5.1 Channel Network Audio Decoder (Dolby E, AC-3, MPEG) Tally HD-Video HD Master Control (10x1)

  • Page 19: Ac-3 Distribution System

    Linear Acoustic AERO.one User Guide Applications AC-3 Distribution System Figure 3-1 shows how an AERO.one would be installed in a typical AC-3 distribution system that might be found at a PBS or FOX station. The Dolby Digital (AC-3) bitstream data rate is 384 or 448 kbps and is delivered within a standard 19.39 Mbps ATSC transport stream.

  • Page 20: Pcm Distribution System

    Linear Acoustic AERO.one User Guide Applications Existing Local TV Plant Network IRD Network Feed Tally Transport Stream Upconverter Audio EAS/AUX HD/SD-SDI AERO.one (DTV) with Dolby Digital (AC-3) Encode Option LtRt or LoRo Stereo Out 5.1 Channel PCM Dolby Digital (AC-3)

  • Page 21: Aero.one In A Typical Baseband Pcm System (I.e. Abc, Nbc)

    Linear Acoustic AERO.one User Guide Applications Network Feed Data B AES A AES B AES C AES D HDSDI AES Frame Sync (SMPTE (Not required with AERO) 292M) Network Stereo/LtRt EAS/AUX AERO.one (DTV) with Dolby Digital (AC-3) Encode Option Main Program...

  • Page 22: Hd-Sdi Distribution System

    Linear Acoustic AERO.one User Guide Applications HD-SDI Distribution System Figure 3-3 shows how an AERO.one would be installed in a typical HD-SDI environment, similar to that in use by the CBS and CW networks. In this case, audio and metadata are decoded and then embedded into an HD-SDI signal which can then be routed and switched through the plant and finally applied to the AEROMAX unit.

  • Page 23: Audio Metadata

    Linear Acoustic AERO.one User Guide Applications All three scenarios show how simply the AERO.one integrates into a television plant. Additional features to support SAP and DVS or alternate channels of audio are present in the AERO.air (5.1) version of the product. Please contact your salesperson or the factory for more information.

  • Page 24: Audio Coding Mode

    To set Dialogue Level: Ideally, using either a Linear Acoustic LAMBDA or LQ-1000, or a Dolby LM100 will make this very easy because it displays the actual metadata from the encoded stream and the measured dialnorm value in real time, and the encoder can be quickly adjusted via its front panel.

  • Page 25: Dynamic Range Control

    Linear Acoustic AERO.one User Guide Applications 3.6.3 Dynamic Range Control Dynamic range control profiles can be selected in the Dolby Digital (AC-3) encoder. NOTE: Dialogue Level must be set correctly for the DRC profiles to operate correctly. When using an AERO.one preset such as TV 5B Gen or Light (Television 5-Band General or Light), we suggest using is the Film Standard or Film Light DRC profile in the Dolby Digital encoder for both Line Mode and RF Mode.

  • Page 26: Audience Measurement Systems

    Careful testing by Nielsen and Linear Acoustic has shown that the watermark signal is not disturbed by any of the AERO factory presets or upmixing, and that locating the processor before or after the watermarking equipment has no impact on audience measurement reliability.

  • Page 27: Chapter 4: Detailed Operation

    Linear Acoustic AERO.one User Guide Chapter 4: Detailed Operation This chapter discusses in detail the structure of the Linear Acoustic AERO.one, how to use the front panel interface to access the menus, accessing and saving factory and user processing presets, and GPI and Metadata setup.

  • Page 28: Agc Gain Reduction Metering

    Linear Acoustic AERO.one User Guide Detailed Operation AGC Meters Show the gain reduction status of the Input AGC and the Multiband AGC. More down- ward meter excursion indicates lower gain (more gain reduction). The center dot in each of the AGC bands shows 0dB at the center of the AGC range.

  • Page 29: Statistics Menu

    Linear Acoustic AERO.one User Guide Detailed Operation Statistics Menu Provides details about software, firmware and DSP versions, DSP communications status, as well as listing any installed options. This menu also shows the presence for each of the AES pairs, 1-8.

  • Page 30: Presets - See Chapter 5

    Linear Acoustic AERO.one User Guide Detailed Operation Presets - See Chapter 5 I/O Menu The I/O menu is where the input and output audio, control, and metadata signals are se- lected to interface with the loudness control and upmixing engines.

  • Page 31: Upmix Control

    Linear Acoustic AERO.one User Guide Detailed Operation Critically, the UPMAX algorithm is fully downmix compatible. Many viewers are present- ed with Dolby Digital (AC-3) encoded audio that is downmixed in their set top box or re- ceiver and they happily listen in stereo, none the wiser that more information is actually present.

  • Page 32: Downmix Type

    Linear Acoustic AERO.one User Guide Detailed Operation • Upmix Dsc Thresh: Sets the threshold for the AutoMAX-II algorithm to decide that the input audio is not 5.1. Audio present in the Center, Left Surround, or Right sur- round channels above this threshold will trigger the auto upmixer to start upmixing the LfRf (channels 1/2) audio.

  • Page 33: Sdi Out Destination (Channels 1-16)

    Linear Acoustic AERO.one User Guide Detailed Operation 4.5.12 SDI Out Destination (Channels 1-16) Selects source of audio for re-embedding into an applied SDI signal. Choices are Mute, AES (corresponding pair), and any of the SDI pairs. This menu can be used as a router or pair shuffler within SDI.

  • Page 34: Encoder Menu (Option)

    Linear Acoustic AERO.one User Guide Detailed Operation • System Dialnorm: Specifies the “fallback” dialnorm value which will be used if meta- data is not applied or if it fails. Default is 24. • Apply Dialnorm: Yes/No - If set to yes, then the incoming dialnorm parameter is applied to the incoming audio to scale it prior to processing.
  • Page 35 Lgt. for minimal DRC action. • Dialnorm EnA: Using an ITU loudness meter (Linear Acoustic LAMBDA, LQ-1000 or equivalent), set the transmitted dialnorm value here. Note that the factory default preset of TV 5B Gen is pre-adjusted to produce -24 on average with typical program audio inputs so the default setting is -24.

  • Page 36: Communication Menu

    Lgt. for minimal DRC action. • Dialnorm EnB: Using an ITU loudness meter (Linear Acoustic LAMBDA, LQ-1000 or equivalent), set the transmitted dialnorm value here. Note that the factory default preset of TV 5B Gen is pre-adjusted to produce -24 on average with typical program audio inputs so the default setting is -24.
  • Page 37 Linear Acoustic AERO.one User Guide Detailed Operation...
  • Page 38 Linear Acoustic AERO.one User Guide Detailed Operation...

  • Page 39: Chapter 5: Presets, Processing & Metadata

    Linear Acoustic AERO.one User Guide Chapter 5: Presets, Processing & Metadata The Linear Acoustic AERO.one contains multiple factory-programmed processing pre- sets that have been developed after many hours of listening and experimenting, using hun- dreds of program sources across all genres for tuning. Preset creation is an ongoing process, and we regularly implement new presets based on customer feedback.

  • Page 40: Processing Structure

    Linear Acoustic AERO.one User Guide Presets, Processing & Metadata • ITU LOUDness LMT - Utilizes a specially tuned Input AGC plus Multiband Limit- ers and the Final Limiter to slowly adjust the average program loudness to a given value and the multiband and final limiters will act until the AGC catches up. This preset is appropriate for ingest or live applications but because the Multiband AGC is bypassed it has less ability to manage spectral balance which is important for transmission.

  • Page 41: Adjusting Processing

    Linear Acoustic AERO.one User Guide Presets, Processing & Metadata 5.1.2 Adjusting Processing Following is a description of all adjustable core processing parameters. Defaults are shown for the DTV 5B Gen preset, other presets will obviously vary some or all of these param- eters.
  • Page 42 Linear Acoustic AERO.one User Guide Presets, Processing & Metadata Parametric Eq(ualization) Three bands of parametric equalization are provided for fine tuning if necessary. None of the factory-supplied presets use the parametric equalizers, but they are provided to create notch filters or other effects if necessary. Each filter has a gain control with a +/-12dB range, a center frequency control that varies from 20 Hz to 22.050 kHz, and a bandwidth...
  • Page 43 Linear Acoustic AERO.one User Guide Presets, Processing & Metadata • Threshold: -18dBFS - 0dBFS (default: -16dBFS) • Attack: 0 - 150, slowest - fastest (default: 21) • Release: 0 - 150, slowest - fastest (default: 47) • Progressive Release: 0 - 100, slowest - fastest (default: 50) -Sets the speed at which the release time is increased faster at very low gain val- ues.
  • Page 44 Linear Acoustic AERO.one User Guide Presets, Processing & Metadata B4:88, B5:92) -How fast an input signal recovers from a gain change once that signal falls be- low the set threshold. • B1 - B5 AGC Thresh(old): -12.00dB - +12.00dB (default: 0.00dB all) -The reference point for the attack and release parameters to act on the audio signal present in that band.
  • Page 45 This is useful as more aggressive pre- sets will measure differently from less aggressive versions. NOTE: With TV 5B Gen selected and normal dialogue-based programming applied, loudness will measure approximately -24 LKFS using a Linear Acoustic LAMBDA or LQ-1000 or equivalent ITU-R BS.1770 loudness meter.

  • Page 46: Default Settings For Factory Presets

    Linear Acoustic AERO.one User Guide Presets, Processing & Metadata Figure 5-3 Default Settings for Factory Presets...

  • Page 47: Chapter 6: Troubleshooting

    Linear Acoustic AERO.one User Guide Chapter 6: Troubleshooting The Linear Acoustic AERO.one is a very stable and reliable unit, and most problems can be traced back to mis-wiring causing incorrect signals to be applied to the unit, or more than likely mis-configuration. As simple as the unit is to use once installed, it is very flexible and thus a necessarily complex processor.

  • Page 48: Output Audio Clicks And Pops

    Linear Acoustic AERO.one User Guide Troubleshooting 6.1.3 Output Audio Clicks and Pops This could indicate that the AES Reference is missing or at the wrong sample rate (the unit expects to be locked to 48kHz). If improper reference is chosen, the Ref LED will be red...

  • Page 49: Nielsen Watermark Issues

    Linear Acoustic AERO.one User Guide Troubleshooting 6.1.6 Nielsen Watermark Issues Careful testing has shown that the Nielsen audience measurement watermark is not dis- turbed by any of the factory presets, nor upmixing when the watermarking equipment is installed prior to the AERO.one. Normally, we recommend that watermarking gear be in- stalled ahead of any audio processing.
  • Page 50 Linear Acoustic AERO.one User Guide Troubleshooting...
  • Page 51 16 msec fixed, LoRo Out 7/8 Processing Delay 21 msec fixed, LtRt Out 7/8 Dolby Digital/DD Plus encoding adds 137msec to the total. Linear Acoustic AEROMAX loudness and DRC engine plus Processing Algorithms UPMAX upmixing engine; ITU downmix Audio Word Length...
  • Page 52 Linear Acoustic AERO.one User Guide Specifications Table 7-2 Audio Encoding Specifications Dolby Digital (AC-3) and Dolby Digital Plus (E- Audio Encoder Types AC-3) per ATSC A/52:2010 Encoder Modes Primary: up to 5.1; Secondary: up to 2.0 Dolby Digital: Up to 640 kbps...

  • Page 53: Ethernet Port

    Linear Acoustic AERO.one User Guide Specifications Metadata Input Port 9-pin female D-connector with full-duplex RS-485 protocol running at 115 kbps. Pinout is compatible with SMPTE 207M. Pin-for-pin compatible with Dolby metadata sources (i.e. straight-through cable should be used. Table 7-5 Metadata I/O Port Pinout...
  • Page 54 Linear Acoustic AERO.one User Guide Specifications GPI/O Parallel Control Port TTL level controls, active Low. The 5-V output for external GPO indicators is limited by a self-resetting fuse. Table 7-6 GPI/O Port Pinout Connection GPI 1 GPI 2 GPI 3...

Table of Contents