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ABOUT VIDEO DECODER - help please

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TERRYWU3

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ABOUT VIDEO DECODER

DEAR ALL:
Who can give me a help
I want to use SAA7108 (PHILIPS VIDEO CODEC ) to show TV signal
on LCD PANEL

Q1: Seems all VIDEO DECODER only support ITU-R BT601 or BT656
Y CB CR 4:2:2 or 4:1:1 format ......not a RGB format
How to convert it to RGB format ??

Q2: Is Video decoder its output data still an interlace picture ?
If it is true . How to De-interlace it to a non-interlace data
then display it on LCD......
If it possible I want to implement it use FPGA
THANKS !!
 

Hi,
A1: If it is absent BT656 to RGB converter, you have use fpga with multiplyers built in. https://www.opencores.org/projects/
Try to use it as a reference.
A2: FPGA can be implemented as a frame memory controller
 

Perhaps you should try using the following chip from Analog Devices which convert CCIR-601 digital data into analog basedband for displaying on TV.

**broken link removed**

This is what they use inside a digital camera to display the pictures onto the TV.

Hope it helps.
 

601 standard is only for interlace - noninterlace is not def

since 601 is interlace defined you'll need memory to store the frame and to rearange the lines in an interlace fasion!
so agin you will need logic for that !
 

Re: ABOUT VIDEO DECODER

TERRYWU3 said:
Q1: Seems all VIDEO DECODER only support ITU-R BT601 or BT656
Y CB CR 4:2:2 or 4:1:1 format ......not a RGB format
Click to expand...

not all Video Decoders support BT.656 only. the reason that most decoders support only BT.656 is because YCbCr is the standard for video signal PROCESSING in the digital domain while RGB is strictly used for DISPLAY (for apparent bandwidth reasons). and since decoders will often be used together with MPEG encoders (as in DVRs), it's convenient to have YCbCr output.

as I know, at least Conexant and Samsung decoders support both YCbCr and RGB outputs.

casual3
 

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