Dolby Laboratories 585 User Manual
  1. Manuals
  2. Brands
  3. Dolby Laboratories Manuals
  4. Processor
  5. 585
  6. User manual
Dolby Laboratories 585 User Manual

Dolby Laboratories 585 User Manual

Time scaling processor
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Model 585
Time Scaling Processor
Issue 2
Part Number 91796

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 585 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Dolby Laboratories 585

Summary of Contents for Dolby Laboratories 585

  • Page 1 Model 585 Time Scaling Processor Issue 2 Part Number 91796...
  • Page 2 THIRD-PARTY RIGHTS (INCLUDING, BUT NOT LIMITED TO, COPYRIGHT AND PATENT RIGHTS). LIMITATION OF LIABILITY: IT IS UNDERSTOOD AND AGREED THAT DOLBY LABORATORIES’ LIABILITY, WHETHER IN CONTRACT, IN TORT, UNDER ANY WARRANTY, IN NEGLIGENCE, OR OTHERWISE SHALL NOT EXCEED THE COST OF REPAIR OR REPLACEMENT OF THE DEFECTIVE COMPONENTS OR ACCUSED...

  • Page 3: Table Of Contents

    Adjusting the Pitch Shifting Value...4-1 Using Pitch Shifting to Perform Online Time Scaling...4-2 Chapter 5 Applications...5-1 Stand-Alone Processing ...5-1 Processing with Synchronized Video...5-2 Model 585 Time Scaling Processor Table of Contents ...2-1 Digital Audio Connections ...2-2 Serial Connection Ports...2-3 Remote Connection Ports ...2-4 Reading the Display ...2-5...
  • Page 4 Multichannel Delivery ...6-1 Development of Time Scaling...6-2 6.2.1 6.2.2 6.2.3 6.2.4 Intelligent Analysis...6-3 Chapter 7 Reference Data Channel Mapping ...7-1 Specifications ...7-2 Model 585 Time Scaling Processor Operation...6-1 Time-Domain Solutions ...6-2 Frequency-Domain Solutions ...6-2 Modeling-Based Solutions...6-3 Choosing a Solution ...6-3 ...7-1...
  • Page 5 Figure 1 Checking the Main Fuse...viii Figure 2-1 Connections: Signal In and Out...2-2 Figure 2-2 Connections: Remote RS-232, GP I/O, Metadata In and Out ...2-3 Figure 2-3 Model 585 Front Panel ...2-4 Figure 2-4 Front-Panel Buttons ...2-5 Figure 5-1 Stand-Alone Time Scaling ...5-2 Figure 5-2 Single-Pass Pitch Shifting ...5-3...

  • Page 6: Regulatory Notices

    E2 environment in accordance with this manual. Use power cord Dolby part number 92031 supplied with unit (pre-fitted with 13A plug to BS1363) to connect Model 585 to the mains supply. This equipment must be earthed. Model 585 Time Scaling Processor...
  • Page 7 Gebruik alleen zekeringen van de aangegeven typen en waarden. Aansluiting van de unit alleen aan een geaarde wandcontactdoos. De netkabel die met de unit wordt geleverd, moet als volgt worden aangesloten: Model 585 Time Scaling Processor IMPORTANT SAFETY NOTICE Live—Brown Neutral—Blue...

  • Page 8: Fusing Information

    If you find it necessary to replace the internal fuse, be certain to replace it with a fuse of the same type and rating as printed on the switching power supply board. Model 585 Time Scaling Processor Open the door...

  • Page 9: Chapter 1 Introduction

    Model 585 Time Scaling Processor Chapter 1 Introduction The Model 585 Time Scaling Processor delivers true time scaling and pitch shifting for the studio professional. A change in the playback speed of analog tape—or in the sample playback rate for digital formats—has always brought about a change in the audio pitch as well as the...
  • Page 10 Pitch shifting, sometimes referred to in other documents as pitch scaling, alters the perceived frequency of the audio signal from that of the original signal, while leaving the duration of the signal the same as the original. Pitch shifting and its implementation using Model 585 is covered in Chapter 4.

  • Page 11: Chapter 2 Getting Started

    This chapter covers connection requirements for Model 585 and the basics of using the front-panel controls. Unpacking and Inspection Before unpacking Model 585, inspect the outer carton for shipping damage. If the carton shows damage, inspect Model 585 in the associated areas. The BNC connectors on the rear panel are covered with protective plastic caps.

  • Page 12: Rear Panel

    T 1A L (1 amp, 250 V, 20 mm, time-lag, low-breaking capacity) for all operating voltages. WARNING: Before applying power, check the main fuse, using the procedure on page viii. There is no power switch on Model 585. To apply power, connect the power cord to a live outlet. 2.3.1 Digital Audio Connections Figure 2-1 shows the digital audio input and output connections.

  • Page 13: Serial Connection Ports

    Metadata Out downstream Dolby E or Dolby Digital encoder. . Model 585 requires PCM audio input at a sample rate of requires a valid AES digital audio signal. That input is used to derive the . These connections carry the processed PCM signal.

  • Page 14: Remote Connection Ports

    The menu system has two independent structures: setup and status. The setup menu lets you control and configure Model 585 to suit your requirements. The status menu displays information regarding the operating status. There are two ways to adjust settings on Model 585. All functions are adjustable using the buttons below the display window, and some functions can be easily adjusted using the knob.

  • Page 15: Reading The Display

    Model 585 Time Scaling Processor 2.4.1 Reading the Display After powering up, Model 585 displays the main status menu. The factory default is: The main status menu shows you: On the upper line, the program configuration and the sensitivity level. In this example, 5.1 + 2 defines two programs: Program 1, a 5.1 mix;...

  • Page 16: Knob

    Model 585 Time Scaling Processor Button Shift Selects the alternate function for a button. To select hold down Setup From any status menu, displays the last setup menu viewed, or the Unit Setup menu if a setup menu has not been viewed in the previous five minutes.

  • Page 17: Status Menu

    Table 2-2 Status Menu Screens Definition Shows program configuration and pitch shifting value. Shows version number of firmware loaded on Model 585. Enter to see status of the input signal for each channel pair. Shows status of the AES Reference signal.

  • Page 18: Setup Menu

    Processes channel pairs 1/2, 3/4, 5/6, and 7/8 as four separate stereo 4 × 2 programs. Model 585 processes all program configurations to the same high quality. Therefore, there is no difference in audio performance between 2 + 2, 3 × 2, or 4 × 2 program configurations.

  • Page 19: Operating Mode

    For some material, however, the 5–high setting may be too sensitive, causing Model 585 to focus on subtle audio elements that can interfere with the processing of the most prominent material. In this case, Model 585 may not produce its best results.
  • Page 20 The factory default is Auto, which assigns all channels according to the standard channel mapping shown in Table 7-1. If the input to Model 585 includes a program with an LFE channel assignment not in line with the assignments in Table 7-1, you need to assign the LFE channel manually using this menu.

  • Page 21: System Settings

    Cents represent musical cents, where 100 cents equals one semitone, and 1,200 cents equals one octave. Model 585 offers a shifting range of –282 to +242 cents. Percent mode operates in the same manner as frame mode in all but two ways: it lacks the additional +4.17% setting, and does not indicate the values appropriate for...
  • Page 22 Virtual Dolby Technologies Test DVD Track List...

  • Page 23: Chapter 3 Time Scaling

    Transport menu. At the standard 48 kHz sampling rate, Model 585 can store approximately 23 minutes of mono, 11.5 minutes of stereo, 6 minutes of four-channel, 4 minutes of 5.1-channel, or almost 3 minutes of eight-channel audio material.

  • Page 24: Play

    If you have not yet played any of the clip, the display reads 00:00.00, as shown here. The clock symbol is there simply to remind you that Model 585 is in time scaling mode. Note: The time displayed represents the scaled time value according to the current scaling percentage.
  • Page 25 Model 585 Time Scaling Processor When a clip is stored in the Model 585 memory, the Play menu displays the scaled time value of that clip. If you change the scaling percentage, the length of the scaled clip changes to reflect that, and the Play menu display, In point, and Out point all update accordingly.
  • Page 26 Model 585 Time Scaling Processor In Point The In point is the point in the audio clip when playback starts. If the transport position is at or before the In point when you press Play, playback begins at the In point. When the transport is at the In point, the display shows a dot before the ·...

  • Page 27: Record

    Model 585 Time Scaling Processor you release Shift you release Shift Holding makes it particularly easy to move through the clip rapidly, but it also Shift allows you to move slowly at a steady pace, without having to manually turn the knob.

  • Page 28: Time Scaling Of Longer Programs

    Model 585 Time Scaling Processor all eight channels will be recorded, and the available recording memory is slightly less than three minutes at 48 kHz. To select which program to record, use the arrow buttons, then press Time Scaling of Longer Programs...

  • Page 29: Chapter 4 Pitch Shifting

    Adjusting the Pitch Shifting Value The pitch shifting function is active in every menu except Transport , unless Model 585 is in bypass mode. The pitch shifting value can be adjusted in two ways: in the Pitch menu, or in the main status menu.

  • Page 30: Using Pitch Shifting To Perform Online Time Scaling

    Using Pitch Shifting to Perform Online Time Scaling You can use the pitch shifting function of Model 585 in combination with other equipment to deliver online time scaling of programs of any length. To perform online time scaling: 1.

  • Page 31: Chapter 5 Applications

    Model 585 can be used to compensate for pitch changes in many applications, such When changing from 24 to 25 fps (for example, when converting a film source to video for broadcast or DVD release) When changing from 25 to 24 fps (for example, when converting a video...

  • Page 32: Processing With Synchronized Video

    Source Model 585 Model 585 For details on how to operate Model 585 to perform stand-alone time scaling, see Section 3.1, Transport Menu. Processing with Synchronized Video To synchronize pitch shifted audio with its associated video program, the key element is compensating for the delay created by the audio processing.

  • Page 33: Figure 5-2 Single-Pass Pitch Shifting

    4.2. By advancing the audio timecode by the same value as the delay setting on Model 585, you send synchronized audio and video in a program that is time scaled. The time scaled program is ready for either immediate broadcast, or recording onto a new master tape.
  • Page 34 Virtual Dolby Technologies Test DVD Track List...

  • Page 35: Chapter 6 Principles Of Operation

    Time scaling of audio has been accomplished previously using a variety of approaches. Model 585 differs from previous products in two fundamental ways: It provides phase-synchronous multichannel processing in addition to processing of simpler programs. It steps away from the weaknesses of the various previous approaches.

  • Page 36: Development Of Time Scaling

    Model 585 Time Scaling Processor Development of Time Scaling Time scaling of audio was first achieved in the 1950s with the invention by Fairbanks, Everitt, and Jaeger discarded and repeated sections of audio signal by using a rotating playback head, and became known as the sampling or splicing technique.

  • Page 37: Modeling-Based Solutions

    Because of the variety and complexity in some program material, this time- consuming selection process has been, before Model 585, an exercise in choosing the least problematic option, rather than finding an optimal solution.
  • Page 38 As the complexity of the audio increases, Model 585 identifies the most prominent element at any given moment and adjusts the time scaling or pitch shifting accordingly.

  • Page 39: Chapter 7 Reference Data

    2 + 4 2 + 6 4 + 2 4 + 2 2 + 2 2 + 4 2 + 2 2 + 2 7.1 Scrn Model 585 Time Scaling Processor Channel 1L/1R 1C/1LFE 1L/1R 1C/1LFE 1L/1R 1C/1S 1L/1R 1C/1S...

  • Page 40: Specifications

    Model 585 Time Scaling Processor Note: In multichannel audio, the LFE channel is bandwidth-limited, so to properly process the complete program audio, the LFE channel must be assigned according to standard channel mapping. Specifications Time Scaling/Pitch Correction Process Dolby proprietary, real-time processing Channel Modes/Program Configurations Processes up to eight discrete channels of audio;...
  • Page 41 Model 585 Time Scaling Processor Reference Data Dynamic Range >110 dB Delay 400 to 480 ms, user-selectable Digital Audio Inputs Four BNC female connectors with loop-through, 75 , unbalanced, signal levels per AES-3ID-1995/SMPTE 276M specifications Digital Audio Outputs Four BNC female connectors, 75 , unbalanced, signal levels per AES-3ID-...
  • Page 42 Model 585 Time Scaling Processor Reference Data Dimensions and Weight 2-U rack-mount: 88 483 324 mm (3.5 19 12.75 inches) Net: 6.5 kg (14.25 lb) Environmental Conditions Operating: 0 o to 50 o C (32 o to 122 o F), natural convection cooling 0 to 98% relative humidity (non-condensing) Non-operating: –20 o to +70 o C (–4 o to +158 o F)

Table of Contents

Save PDF