For help in TVP5150 decoding image color problems

yang gao

Other Parts Discussed in Thread: TVP5150

Composite video decoding, using TVP5150 AV signal is generated by computer s terminal, generated by the image color has been changed, and it is continuous cyclical changes, including instant color is correct

if(atWriteReg(0xb8,0,0x02)==1)

return 1;

if(atWriteReg(0xb8,0x03,0x0f)==1)

return 1;

if(atWriteReg(0xb8,0x0f,0)==1)

return 1;

if(atWriteReg(0xb8,0x0d,0x07)==1)

return 1;

if(atWriteReg(0xb8,0x28,0x02)==1)

return 1;

over 11 years ago

0 Steve Clynes over 11 years ago

TI__Mastermind 43875 points

This looks more like a digital setup/hold violation between the TVP5150 and the back end processing.

Make sure that your timing margins between the TVP5150 digital outputs and the next processing stage are correct. See section 4.3.3 Timing in the datasheet for output timing.

You can also try changing the polarity of the capture clock in the back end processor, or add a delay or inverter on the PCLK signal to adjust the timing relationships.

BR,

Steve

0 yang gao over 11 years ago in reply to Steve Clynes

Prodigy 20 points

Thank you very much.

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For help in TVP5150 decoding image color problems