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DE10-Standard
User Manual
73
www.terasic.com
January 19, 2017
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This demonstration turns DE10-Standard board into a TV box by playing video and audio from a
DVD player using the VGA output, audio CODEC and the TV decoder on the DE10-Standard board.
Figure 5-9
shows the block diagram of the design. There are two major blocks in the system called
I2C_AV_Config and TV_to_VGA. The TV_to_VGA block consists of the ITU-R 656 Decoder,
SDRAM Frame Buffer, YUV422 to YUV444, YCbCr to RGB, and VGA Controller. The figure also
shows the TV decoder (ADV7180) and the VGA DAC (ADV7123) chip used.
The register values of the TV decoder are used to configure the TV decoder via the I2C_AV_Config
block, which uses the I2C protocol to communicate with the TV decoder. The TV decoder will be
unstable for a time period upon power up, and the Lock Detector block is responsible for detecting
this instability.
The ITU-R 656 Decoder block extracts YcrCb 4:2:2 (YUV 4:2:2) video signals from the ITU-R 656
data stream sent from the TV decoder. It also generates a data valid control signal, which indicates
the valid period of data output. De-interlacing needs to be performed on the data source because the
video signal for the TV decoder is interlaced. The SDRAM Frame Buffer and a field selection
multiplexer (MUX), which is controlled by the VGA Controller, are used to perform the
de-interlacing operation. The VGA Controller also generates data request and odd/even selection
signals to the SDRAM Frame Buffer and filed selection multiplexer (MUX). The YUV422 to
YUV444 block converts the selected YcrCb 4:2:2 (YUV 4:2:2) video data to the YcrCb 4:4:4 (YUV
4:4:4) video data format.
Finally, the YcrCb_to_RGB block converts the YcrCb data into RGB data output. The VGA
Controller block generates standard VGA synchronous signals VGA_HS and VGA_VS to enable
the display on a VGA monitor.
Содержание DE10-Standard
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