DM643x Video Display - Configure Video Processing Back End to display NTSC/PAL video

Library

Embedded Coder/ Embedded Targets/ Processors/ Texas Instruments C6000/ DM6437 EVM

Embedded Coder/ Embedded Targets/ Processors/ Texas Instruments C6000/ Scheduling

Description

This block configures the Video Processing Back End (VPBE) to display NTSC/PAL video.

Dialog Box

The block dialog box comprises multiple tabs:

• Window Configuration — Configure the video window, position, zoom, and whether to display the input port.

• Video Encoder — Configure the video display mode, analog video output, and horizontal or vertical expansion.

The dialog box images show all of the available parameters enabled. Some of the parameters shown do not appear until you select one or more other parameters.

Window Configuration

Video window

Create a video display window, Video0 or Video1.

You must create a Video0 display window before you can use the following video elements:

• a Video1 video display window from the DM643x Video Display block

• an on-screen display from the DM643x OSD block

• a video rectangle from the DM643x Draw Rectangles block

Window location source

Select the method for setting the location of the graphics display window. Specify via dialog creates the Window location field. Specify via input port creates an position input (Pos) on the OSD block which accepts the location of the window as data.

Window location

This parameter appears when you set Window location source to Specify via dialog. Set the pixel width, height, and base coordinates. For example, the default values, [360, 240, 100, 100] set the width to 360 pixels, the height to 240 pixels, the base coordinates for x to 100 pixels, and the base coordinates for y to 100 pixels.

Note   [0, 0], the origin of the coordinate system, is the located in the upper-left corner of the Video0 window.

Horizontal zoom

Set the horizontal magnification of the graphics display window. Selecting Specify via input port creates a zoom input (Zoom) on the video display block.

Vertical zoom

Set the vertical magnification of the graphics display window. Selecting Specify via input port creates a zoom input (Zoom) on the video display block.

Show input port for enable control

Create an input port (En) to enable or disable the video display window.

Video Encoder Pane

Video output mode

Set the output mode to Analog or Digital. This parameter is only available in the block that comes from the Avnet S3 ADSP DM6437 library.

Video display mode

Set the video format to NTSC , PAL, HD 480p60, or HD 576p50.

Analog video output

Set the output type to Composite, S-video, or Component.

Enable horizontal 9/8 expansion

Expands the image horizontally. Typically used to compensate for spatially compressed NTSC and PAL video signals. For example, use this setting to correct a 720 x 480 pixel NTSC analog video input that is displayed as a 640 x 480 pixel image.

Enable vertical 6/5 expansion

Expands the image vertically. Typically used to compensate for spatially compressed PAL video signals. For example, use this setting in combination with the Enable horizontal 9/8 expansion setting to correct a 720 x 576 pixel PAL analog video input that is displayed as a 640 x 480 pixel image.

See Also

DM643x Draw Rectangles, DM643x OSD, DM6437 EVM Video Capture, DM643x Video Capture

© 1984-2012- The MathWorks, Inc.    -   Site Help   -   Patents   -   Trademarks   -   Privacy Policy   -   Preventing Piracy   -   RSS