dolby® digital / ac-3 encoding using the argus ... - TBC Integration

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6Dolby Digital / AC-3 Encoding Using the Argus Encoder• Connect the supplied input/output cable to the board’s D-connector.• Install the software for the Momentum Dolby Digital/AC-3encoder, making sure that the Momentum microcode is located inthe directory from which the FMTestApp (or EDL Editor) applicationis run. The Momentum microcode is comprised of three files:enc13.cld, enc23.cld, and enc33.cld.• Before starting the application, make certain that the registry keyHKEY_CURRENT_USER\Software\Vela Research\BroadcastArgus\EncoderConfig\AC3Installed is set to 1.• Before cueing for an encode, use the Dolby ® Parameter ControlApplication to activate Dolby Digital/AC-3 encoding and to set allof the Dolby-related parameters.Dolby Parameter Control ApplicationMost of the parameters related to Dolby Digital/AC-3 encoding can beset using the Dolby Parameter Control Application. The one notable exceptionto this rule is the setting of the PID when the Dolby Digital/AC-3 stream is to be included in a transport stream. The Dolby PID is setusing the Mux property page of RegCtrlPnl.The Dolby Parameter Control Application has four property pages:Configuration Control, Bitstream Info, Preprocessing, and Input/Output.Configuration Control Property PageIt is from the Configuration Control property page (Figure 1) that youturn Dolby Digital/AC-3 encoding on or off and that you set the bit rateand sample rate of the AC-3 stream. The following properties are representedon the Configuration Control page:Dolby EnabledCheck this checkbox if and only if you wish to include a Dolby Digital/AC-3 stream in the next encoded file.Time Code StartCheck this checkbox if and only if you wish to use the mark-in and mark-outof the VTR component to control the start and stop of the next Dolby Digital/AC-3 encode. Several requirements must be met in order to use this option:1. VTR control must be enabled. Use the VTR Control page on the EDLEditor or the VTR property page on RegCtrlPnl to enable VTR control.
Dolby Digital / AC-3 Encoding Using the Argus Encoder 7Figure 1. Configuration Control Property Page2. The Momentum board must be supplied with a time-code input signal.For example, the time-code-out of the tape deck might be connectedto the time-code-in cable supplied with the Momentum encoder.3. The mark-in and mark-out supplied through the EDL Editor or throughRegCtrlPnl must be valid time codes that will be provided to theMomentum encoder by the time-code generator.4. Prior to the encode, the tape must be pre-rolled to a point well ahead ofthe mark-in.Start DelayThe numeric value in this field specifies the number of milliseconds thatthe Argus encoder will wait after starting the Momentum encoder beforestarting the IBM audio and video encoders. The default value is 75 msec.A negative value may be provided. If the value is negative, the IBM audioand video encoders will be started before the Momentumencoder is started. This value can be adjusted to guarantee propersynchronization of the video and Dolby Digital/AC-3 content.Data RateThis field specifies the speed in kilobits per second at which the Dolby
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