Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for Cobalt Digital Inc OGCP-9000
Summary of Contents for Cobalt Digital Inc OGCP-9000
- Page 1 Audio Loudness Meter Option (+LM) ® ® Option for Fusion3G and COMPASS Cards (+LM-C) and OGCP-9000 Remote Control Panel/WinOGCP (+LM-P) Manual Supplement Cobalt Digital Inc. 2406 E. University Ave. Urbana, IL 61802 Voice 217.344.1243 • Fax 217.344.1245 www.cobaltdigital.com OPT-SW-LM-MS (V2.9)
- Page 2 Furthermore, Cobalt Digital Inc. reserves the right to make changes to any products herein to improve readability, function, or design. Cobalt Digital Inc. does not assume any liability arising out of the application or use of any product or circuit described herein.
-
Page 3: Table Of Contents
Activating the Audio Loudness Meter Feature (+LM-C) on Host Card(s)................. 2-2 Licensable Features ................... 2-2 Activating +LM-P Audio Loudness Meter Option on OGCP-9000 Remote Control Panel............2-3 Activating +LM-P Audio Loudness Meter and Other Options on WinOGCP..............2-4 Chapter 3 Operating Instructions. - Page 4 Session Setup ......................3-16 Pre/Post Metering Shortcut ............... 3-16 Running a Session ..................3-16 Post-Session Reports ..................... 3-18 Loudness Meter Session Reports (OGCP-9000)........3-18 Loudness Meter Session Reports (WinOGCP) ......... 3-19 Troubleshooting ....................3-22 Appendix A Loudness Measurement Guidelines and Techniques..
-
Page 5: Chapter 1 Introduction
Overview Note: Unless otherwise noted in this manual, “Control Panel” equally applies to either the OGCP-9000 Remote Control Panel rack-mount unit or the Win- OGCP PC-based application. This manual supplement provides descriptions and overviews, installation, setup, and operating instructions for the Audio Loudness Meter option (+LM). -
Page 6: Loudness Measurement Overview
Loudness Measurement Overview • Chapter 3, “Operating Instructions” – Provides overviews of operating controls and instructions for using the Audio Loudness Meter option. This chapter contains the following information: • Loudness Measurement Overview (p. 1-2) • Audio Loudness Meter Functional Description (p. 1-5) •... - Page 7 Introduction Loudness Measurement Overview High-Pass and Mean-Square Acoustic Channel Summation Shelving Filters Energy Calculation Weighting Σ Overall LKFS Loudness Value Using the expression shown below, each channel’s hi-pass filtered contribution (y) to relative acoustical energy is calculated for period T. ∫...
-
Page 8: Ebu R 128 Overview
Loudness Measurement Overview EBU R 128 Overview Note: Refer to EBU – Tech 3343, “Practical guidelines for Production and Imple- mentation in accordance with EBU R 128” for more information. EBU R128 is based on ITU-R BS.1770-1 and therefore uses the same signal processing scheme. -
Page 9: Audio Loudness Meter Functional Description
Audio Loudness Meter ® option is used in conjunction with a Cobalt OGCP-9000 Remote Control Panel and/or WinOGCP (which provides all user interface functions), and a host card which serves to monitor the intended audio signals and provides LKFS data to the Control Panel. - Page 10 (session start/stop based on timecode range). The Audio Loudness Meter generates session reports (as both .html and .csv) that are available via the network-connected PC(s). Host Card OGCP-9000 or WinOGCP L, R, C, Card LFE, Ls, Rs,...
-
Page 11: Aggregate Lkfs Processing
Introduction Audio Loudness Meter Functional Description Aggregate LKFS Processing Short-Term LKFS Calculation (See Figure 1-3.) The LKFS values for the individual inputs comprising the LKFS monitor/measurement display channels are processed and summed as described in Loudness Measurement Overview (p. 1-2) for a given sampling period. - Page 12 Audio Loudness Meter Functional Description Session LKFS Calculation (See Figure 1-4.) A session-duration calculation/display (sometimes referred to as “infinite-duration) is numerically displayed. This is defined by the averaged sum of all short-term samples in the session, concluding when the session is stopped. Session LKFS Value Session LKFS value is the average of all short-term measurements of a particular session.
-
Page 13: Session Time Markers And Sources
Introduction Audio Loudness Meter Functional Description Configurable LUFS/LKFS HI/LO Alert Parameters The Audio Loudness Meter offers configurable alert thresholds at which a measured LUFS/LKFS result can be considered unacceptably above or below a target value. These alerts in turn can provide consistent and unambiguous go/no-go results for a loudness session with no interpretation of quantitative results required on the part of the QC operator. -
Page 14: Audio And Video Formats Supported By The Audio Loudness Meter
• Refer to the Product Manual for the host card for technical specifications of the audio and video formats supported. • Refer to Product Manual “OGCP-9000 Remote Control Panel Product Manual” (PN OGCP-9000-OM) for technical specifications for the Control Panel. -
Page 15: Chapter 2 Option Installation
Activating Audio Loudness Meter Feature Keys (p. 2-2) Note: WinOGCP has a control layout largely identical to that of the OGCP-9000 Remote Control Panel rack-mount unit. The “knobs” on WinOGCP (as compared to the physical knobs on OGCP-9000) operate as described below. -
Page 16: Connecting Control Panel To Lan And Host Card Frames
Connecting Control Panel to LAN and Host Card Frames Instructions here assume that the Control Panel is connected to the LAN and host card frames. If this is not already done, refer to the OGCP-9000 or WinOGCP Product Manual as appropriate. -
Page 17: Activating +Lm-P Audio Loudness Meter Option On Ogcp-9000 Remote Control Panel
+LM-P require that the control panel has a software build that supports this option. The control panel must be loaded with Processor Version 1012 or greater before proceeding. From the Cobalt Digital Inc. web site, go to Support > Firmware to download the current firmware, as well as instructions. Note: In performing this procedure, you will need to contact Cobalt Digital Inc. -
Page 18: Activating +Lm-P Audio Loudness Meter And Other Options On Winogcp
WinOGCP must be loaded with Application Build 1054 or greater before proceeding. From the Cobalt Digital Inc. web site, go to Support > Firmware to download the current firmware, as well as instructions. -
Page 19: Chapter 3 Operating Instructions
OGCP-9000-OM) for general operating instructions on using the Control Panel keypad, knobs, and displays. • WinOGCP has a control layout largely identical to that of the OGCP-9000 Remote Control Panel rack-mount unit. The “knobs” on WinOGCP (as com- pared to the physical knobs on OGCP-9000) operate as described below. -
Page 20: Audio Loudness Meter Measurement Modes
Audio Loudness Meter Measurement Modes Audio Loudness Meter Measurement Modes Table 3-1 lists and describes the measurement modes available for the Audio Loudness Meter option. The EBU +9 EBU +18 , and ATSC -24 modes are factory configured with all parameters conforming to the respective standard and are ready for immediate use (requiring only input channel assignment for use). -
Page 21: Live Data Display (Left Display) And Display Formats
Operating Instructions Audio Meter Displays Figure 3-1 Audio Loudness Meter Left and Right Displays Live Data Display (Left Display) and Display Formats The Audio Loudness Meter has two user-selectable primary metering display formats for the live data (left) display: • Real-Time Bar Graph Format Left Display (Figure 3-2) •... - Page 22 Audio Meter Displays Short-Term Min/Max Short-Term (S) / 5.1-Ch PPM Envelop Integrated (I) Loudness Range Thumbnail EBU Display EBU Display Over/Under Momentary LUFS/ Threshold LKFS Bar Graph Mode Display Marker Format Select Control Mode Select Control Short-Term Avg Plot Span Select Control Look-Back Origin (Real-time)
-
Page 23: Session Control (Right) Display
Operating Instructions Audio Meter Displays Session Control (Right) Display (See Figure 3-4) The right display consists of the typical controls used to run a session, as well as displays related to a running session and post-session assessments. Session Operator Controls Session Loudness Display Session On-Screen Error Log... -
Page 24: Setting Up The Audio Loudness Meter
Setting Up the Audio Loudness Meter Setting Up the Audio Loudness Meter Setup of the loudness meter for most applications can be accomplished using the Basic Setup Using Default Modes instructions below. Measurement conforming to current standards is accomplished as described in Basic Setup Using Default Modes below. - Page 25 Operating Instructions Setting Up the Audio Loudness Meter Configuring Alert Thresholds and Display Units Note: The error threshold settings below affect only user configurable error flagging in displays and logs furnished by the Audio Loudness Meter (for example, LKFS HI and LKFS LO errors). These threshold settings are wholly indepen- dent of the LUFS/LKFS measurement function.
-
Page 26: Advanced Meter Setup
Setting Up the Audio Loudness Meter Press the key and select Select Submenu 3 Loudness Thresholds In the eight-segment control screen that appears, press on the adjacent knob to open selection dialogs and perform settings for the following: Default Configuration Item Description Setting •... - Page 27 Operating Instructions Setting Up the Audio Loudness Meter In the eight-segment control screen that appears, press on the adjacent knob to open selection dialogs and perform settings for the following: Default Configuration Item Description Setting • Target LKFS/LUFS Sets the user-configurable target LKFS/ -24 LKFS/ LUFS value.
- Page 28 Setting Up the Audio Loudness Meter Data within this interval is automat- ically discarded, with any effect on session totals recalculated Trigger Threshold (in dBFS) Operator presses Actual signal-triggered Actual signal-triggered Auto-stop (STOP displayed START button on panel) session start session stop Figure 3-6 Signal-Level Triggering Set up signal level triggering as described below.
- Page 29 Operating Instructions Setting Up the Audio Loudness Meter Timecode Triggering Timecode triggering can be enabled and configured in which actual session start and stop is triggered using timecode values received and reported by the host card. In this mode, the Audio Loudness Meter does not start session measurements and calculations until the Start Trigger Timecode value is...
- Page 30 Setting Up the Audio Loudness Meter Automated Session Rollover (Daily Restart) (See Figure 3-7.) Sessions can be set to stop (wrap-up and close session) and then immediately restart (start a new session) at a specified time within the 24-hour day. This allows for very orderly, consistent reports that are automat- ically generated on a daily basis, with each report subsequently having identi- cal start /stop times and durations (see Post-Session Reports (p.
- Page 31 Rollover control is set to disabled. Note: • OGCP-9000 has limited device memory (as compared to memory available on a computer). If daily rollover is used, it is recommended to save the ses- sion data off of the control panel, and then delete the on-device sessions to free-up memory.
- Page 32 Setting Up the Audio Loudness Meter At this point, WinOGCP is ready to download this segment’s data. • In WinOGCP tool bar, click and select Session Save Session State • In the browser that appears, save the .ses file and close WinOGCP. When ready to resume with another session segment, open WinOGCP and upload the .ses file: •...
- Page 33 Operating Instructions Setting Up the Audio Loudness Meter First segment of session is run and then PAUSE is Second segment is now run by pressing RUN and pressed at end of segment (in this example, a then stopped or paused at end of segment. 7-hour session yielding a session LKFS of -24.4).
-
Page 34: Session Setup
Session Setup Session Setup Pre/Post Metering Shortcut Just like other card control displays on the Control Panel, functions tied to specific cards are invoked by selecting a particular Device. Typically, a Control Panel set up for Loudness Metering has as the pre-loudness Device 1 processed meter and as the post-loudness processed meter. - Page 35 Operating Instructions Session Setup Table 3-2 Typical Operator Workflow Using the Audio Loudness Meter — continued Task Description Roll material and start With material rolling, immediately after cue tone or 0-count marker, session should be started by pressing the meter START button. session Note: Enabling and configuring the Signal-Level or Timecode Triggering feature helps circumvent operator error for this step.
-
Page 36: Post-Session Reports
Conducting another session without downloading the report will result in loss of present report. • .csv reports are not available on OGCP-9000. Access a session report as follows: Open a browser window and enter the Control Panel IP address on a computer connected to the frame LAN (“192.168.0.57”... -
Page 37: Loudness Meter Session Reports (Winogcp)
Operating Instructions Post-Session Reports Loudness Meter Session Reports (WinOGCP) Figures 3-10 thru 3-12 show the WinOGCP Report Directory and examples of web and .csv post-session reports. The report can be manipulated just as any other web page (i.e., used for copy/paste, printed, or saved as a file). Access a session report by clicking View >... - Page 38 Post-Session Reports Session particulars, including general session info and channels monitored Session automatically assessed recommendation Session target LKFS and thresholds Detailed error log showing each logged error, including time stamp, duration, and type of error along with potentially offending root channels Figure 3-11 Example Post-Session html Report 3-20 AUDIO LOUDNESS METER OPTION (+LM-C, +LM-P) MANUAL SUPPLEMENT...
- Page 39 Operating Instructions Post-Session Reports Session particulars, including general session info, target/ threshold settings, and channels monitored • • • 0.5-second updated total short-term LKFS and individual channel LKFS levels (LKFS channels) and peak dBFS (all Error flags for monitored segments channels) exceeding thresholds...
-
Page 40: Troubleshooting
Control Panel in accordance with the Troubleshooting sections of the manuals listed below. • Refer to Product Manual that came with your OGCP-9000 or WinOGCP Control Panel for Control Panel troubleshooting information (including network troubleshooting). •... - Page 41 Operating Instructions Troubleshooting Table 3-3 Troubleshooting Processing Errors by Symptom — continued Symptom Error/Condition Corrective Action No IP Connection Frame with host card (target Make certain intended target frame is properly displayed on Control Panel. frame) not visible to Control connected to network.
- Page 42 Troubleshooting Table 3-3 Troubleshooting Processing Errors by Symptom — continued Symptom Error/Condition Corrective Action Unusually high amount of • Channel meter thresholds • Make certain parameters are set as intended. channel level errors (overpeak or improperly set LKFS HI). • Unused inputs may have •...
-
Page 43: Appendix A Loudness Measurement Guidelines And Techniques
Appendix A Loudness Measurement Chapter 1 Guidelines and Techniques Note: The EBU +9, EBU +18, and ATSC -24 modes are factory configured with all parameters conforming to the respective standards and are ready for immedi- ate use. This information is supplemental and for general information only. Read and understand applicable standards and this appendix if intending to use the meter Custom mode. -
Page 44: Determining Target Lkfs Value
Appendix A Determining Target LKFS Value • Measurement Technique – Before running a session on the material, consideration should be given in using techniques that result in the most meaningful or representative LKFS value for the session. These techniques are described below, along with techniques suggestions suitable for various types of program material. -
Page 45: Measurement Techniques For Various Program Material Forms
Appendix A Measurement Techniques For Various Program Material Forms Local Local insertion ingest without consideration of LKFS results in 6 dB difference from feed Insertion and insertion levels. Viewer is required to LKFS reduce volume to maintain desired level. Feed LKFS Feed Feed... -
Page 46: Importance Of An Anchor Element
Appendix A Measurement Techniques For Various Program Material Forms Importance of an Anchor Element ATSC A/85 defines an anchor element as the aural element in material that serves as the item within a group of sounds that assumes a dominant role and is the “center of attention”. - Page 47 Appendix A Measurement Techniques For Various Program Material Forms 60-second Commercial with Dialog and Background Music. In this example, predominate dialog in the center channel serves as an anchor element. Because of the relatively compressed and dense audio content, an LKFS session can be started at the start of audio content, allowed to run unabated through the course of the material, and then stopped at cessation of audio.
-
Page 48: Specific Measurement Techniques For Various Material Forms
Appendix A Measurement Techniques For Various Program Material Forms Specific Measurement Techniques for Various Material Forms Described below are specific techniques and suggestions for various settings and program material which can be assessed using the Audio Loudness Meter. Live Production. The Audio Loudness Meter can be used in live production to guide the mixing operator to maintain audio level at an LKFS reasonably close to that of typical post-production LKFS. -
Page 49: Modifying Lkfs Session Assessments Using Parametric Settings
Appendix A Measurement Techniques For Various Program Material Forms Modifying LKFS Session Assessments Using Parametric Settings Moving Average Period Setting. (See Figure A-3.) The Moving Average Period sets the sampling time accumulated in each averaging recalculation. As such, longer periods will include more short-term LKFS “look-back” values into the moving average. - Page 50 Appendix A Measurement Techniques For Various Program Material Forms This page intentionally blank AUDIO LOUDNESS METER OPTION (+LM-C, +LM-P) MANUAL SUPPLEMENT OPT-SW-LM-MS (V2.9)
- Page 52 Cobalt Digital Inc. 2406 E. University Ave. Urbana, IL 61802 Voice 217.344.1243 • Fax 217.344.1245 www.cobaltdigital.com OPT-SW-LM-MS (V2.9) Printed in USA...