JVC TDR6 installation and operation guide Front Panel Commands for Encoder Configuration

Decoder

5.Set the decoder VBI format control to automatically detect the type of VBI data to decode. Issue the front panel command

VBI>Format>VBI Format Cntrl=Auto or the remote VBI CONTROL AUTO command.

6.If your system requires you to manually set the type of VBI data to Expanded Windows, follow these steps:

a.Set the decoder VBI format control to manual. Issue the front panel command VBI>Format>VBI Format Cntrl=Manual or the remote VBI CONTROL MANUAL command.

b.Set the VBI format to either 16- or 32-lines Expanded Windows.

From the front panel, issue the command VBI>Format>VBI Format=# where # is set to 16-line or 32-line.

From a remote terminal, issue the command VBI FORMAT # where # is set to lines16 or lines32 .

Encoder Command This section provides a detailed description of the front panel and remote Listing commands used to configure Tiernan encoders for VBI operations.

Front Panel Commands for Encoder Configuration

Tiernan Closed Captions Front Panel Commands

Config>Service # >VBI>CC — used to configure the encoder to transmit closed captions

Tiernan CC

configures the encoder to transmit Tiernan closed captioning information

The Tiernan CC transmission described in this document is Tiernan proprietary. Only Tiernan decoders accommodate the Tiernan

CCfeature described in this document:

Note: Tiernan CC should not be implemented in PAL mode, as the closed caption information will be decoded and placed on line 22 of the video.

■on – encodes two lines of VBI information per frame (one per field) at the expense of losing two lines of active video (one per field)

The encoded picture is simply shifted up one line to include the last line of VBI and to exclude the last line of active video in each field.

■off – does not encode any VBI information (default)

Note: Data transmitted in the VBI region using the Tiernan CC command will experience a degradation in quality given the inherently “lossy” compression of MPEG.

Expanded Windows Front Panel Commands

Config>Service # >VBI>Expand — used to configure the encoder to transmit data in 16-line or 32-line expanded windows mode

VBI_Passthru

Configures the encoder to transmit either 16 or 32 lines of VBI information

■Off – disables expanded windows mode (default)

■16-line – enables 16-line expanded windows mode

■32-line – enables 16-line expanded windows mode

76 01-0870-401B 01/03 Tiernan VBI Data Transmission