Sigma DE2-70 Bit stream used DE270TVPIP.sof or DE270TVPIP.pof, PiPposition, Sub window, signal

Models: DE2-70

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PiP_position_

DE2-70 User Manual

described in the section 6.2. The Composite_to_VGA block takes the video signals from the TV decoders as input and generate VGA-interfaced signals as output. The circuit in the FPGA is equipped with two Composite_to_VGA blocks converting the video signals from the TV decoder 1 and TV decoder 2 respectively. To display two video signals in PIP mode on the LCD/CRT monitor, the output VGA data rate of the Composite_to_VGA block for the sub window must be two times as fast as the rate of the Composite_to_VGA block for the main window. In addition, the output timing of the VGA interface signal from the Composite_to_VGA block is controlled by the pip_position_controller block that determines the stating poison of the sub window. Finally, both of the two VGA interfaced signals will be multiplexed and sent to the LCD/CRT monitor via the VGA_multiplexer block.

Video in 1

or

Video in 2

Video in 2

or

Video in 1

TV decoder

(Sub window)

TV decoder

(Main window)

TD data

Composite_to_

VGA data

 

 

PiP_position_

TD_clock

VGA

controller

(Sub window)

 

 

 

 

 

Control

 

 

 

signal

 

TD_clock_

54Mhz

 

VGA data(Sub)

 

 

PLL

 

 

 

 

 

TD_clock

 

 

VGA data

(27Mhz)

 

VGA

Composite_to_

VGA multiplexer

 

data(Main)

TD data

VGA

 

 

(Main window)

 

 

 

 

 

VGA DAC

Figure 6.3. Block diagram of the TV PIP demonstration.

Demonstration Setup, File Locations, and Instructions

Project directory: DE2_70_TV_PIP

Bit stream used: DE2_70_TV_PIP.sof or DE2_70_TV_PIP.pof

Connect composite video output (yellow plug) of DVD player 1 and DVD player2 to the Video-in 1 and Video-in 2 RCA jack (J8 and J9) of the DE2-70 board respectively. Both DVD players must be configured to provide

o 60 Hz refresh rate o 4:3 aspect ratio

o Non-progressive video

Connect the VGA output of the DE2-70 board to a VGA monitor (both LCD and CRT type of monitors should work)

Connect the one audio output of the DVD player to the line-in port of the DE2-70 board and connect a speaker to the line-out port. If the audio output jacks from the DVD player are of

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Page 73
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Sigma DE2-70 manual Bit stream used DE270TVPIP.sof or DE270TVPIP.pof, Demonstration Setup, File Locations, and Instructions