TVP5150AM1 question for Vertical position of video image?

Fred,

Are you using the discrete HSYNC and VSYNC outputs from the TVP5150AM1 or BT656 digital embeddded syncs in your application?

Larry

Hi, Larry,

I'm using BT656 digital embeddded syncs output from TVP5150AM1.

My Input connector is composite (AIP1A), and video format is NTSC-M ITU-R BT.601.

I tried to use the analog camera to be my input video source to TVP5150AM1, and the black lines were not  quite obvious on the top of the screen. The effect is better than DVD input source. Is this because that there is VBI data in DVD output, but not in analog camera output? Because I can't make sure what kind of the video source user will use, I hope I could adjust the TVP5150AM1 register for video image position to avoid this problem.

Could you have any idea for this?

I'd appreciate your help.Thanks.

Best Regards,

Fred

Fred,

What you are seeing with the DVD player is probably Closed Caption VBI data on line 21.  Do you have a way to exclude lines in your back end processing prior to display?

I believe there is way to alter start/stop postion of the embedded V-bit and F-bit, but the registers must be updated every time the TVP5150AM1 changes video formats.  The registers are automatically overwritten by the firmware when the format changes, so you have to manage when the registers writes are done.  The registers are hiden registers and not in the datasheet.  I will get back to you with more detail on this.

Hi, Larry,

Thanks for your reply first.

There is no way for me to exclude lines in my back end processing prior to display. Hope it can be processed by TVP5150AM1. If it occurs by Closed Caption VBI data on line 21, is there any way to disable these functions of VBI to avoid this case? 

Please teach me more detail and how to do on this, Thank you.

Best Regards,

Fred

Hi, Larry,

Could you please teach me how to do about the register you mentioned?

I'd appreciate your reply.Thanks.

Best Regards,

Fred

Hello Fred,

Did you try what ever suggested by the Taylor.Are you able to shift the image up(Vertical height).If you able to shift the image up can you please share what are register values you have set for the above registers.Can you please help me.

Thanks and Regards,

Satish

Hi Satish,

You can try these value below.

//v-bit 1 start

Set REG 0x21 = 0x00 // Data MSB

Set REG 0x22 = 0x01  // Data LSB

Set REG 0x23 = 0x2B  //register address

SEt REG 0x24 = 0x04  //register bank

//v-bit 1 stop

Set REG 0x21 = 0x00 //register data MSB

Set REG 0x22 = 0x01 //register data LSB

Set REG 0x23 = 0x2C //register address

SEt REG 0x24 = 0x04 //register bank

//v-bit 2 start

Set REG 0x21 = 0x00 //register data MSB

Set REG 0x22 = 0x13 //register data LSB

Set REG 0x23 = 0x29 //register address

SEt REG 0x24 = 0x04 //register bank

//v-bit 2 stop

Set REG 0x21 = 0x00 //register data MSB

Set REG 0x22 = 0x14 //register data LSB

Set REG 0x23 = 0x2A //register address

SEt REG 0x24 = 0x04 //register bank

Best Regards,

Fred

Hello Fred,

I have tried below register settings.

// First unlock the TVP5150AM1 for this update

Set REG 0x21 = 0x51

Set REG 0x22 = 0x50

Set REG 0x23 = 0xFF

SEt REG 0x24 = 0x04

//v-bit 1 start

Set REG 0x21 = 0x00 // Data MSB

Set REG 0x22 = 0x01  // Data LSB

Set REG 0x23 = 0x2B  //register address

SEt REG 0x24 = 0x04  //register bank

//v-bit 1 stop

Set REG 0x21 = 0x00 //register data MSB

Set REG 0x22 = 0x01 //register data LSB

Set REG 0x23 = 0x2C //register address

SEt REG 0x24 = 0x04 //register bank

//v-bit 2 start

Set REG 0x21 = 0x00 //register data MSB

Set REG 0x22 = 0x13 //register data LSB

Set REG 0x23 = 0x29 //register address

SEt REG 0x24 = 0x04 //register bank

//v-bit 2 stop

Set REG 0x21 = 0x00 //register data MSB

Set REG 0x22 = 0x14 //register data LSB

Set REG 0x23 = 0x2A //register address

SEt REG 0x24 = 0x04 //register bank

 With the above register settings the vertical hieght is littile bit increased but picture is distored.Can you suggest me how to over come this problem.

Thanks and Regards,

Satish

Hello Fred,

Do you have information how to set these register values..?, if you have please share with us.

Thanks and Regards,

Satish

Hello Fred,

I was waiting for your replay.Can you share some information regarding how set those register values.Please help us regarding this problem.

Thanks and Regards,
Satish

Hi Satish,

I don't have any information about the indirect register, I just tune the four register to solve it.

Maybe you can try other value of these register.

Best Regards,

Fred

The Set REG 0x22 settings in red below are the actual V-bit start/stop data.  I would change both settings the same amount and same direction.  I believe that you will need to decrement these settings to crop more lines but you will need to double-check this.

Thanks for helping with this Fred.

// First unlock the TVP5150AM1 for this update

Set REG 0x21 = 0x51

Set REG 0x22 = 0x50

Set REG 0x23 = 0xFF

SEt REG 0x24 = 0x04

//Now modify the v-bit start register,

Set REG 0x21 = 0x00 // Data MSB

Set REG 0x22 = 0x04  // Data LSB  This is V-bit start data

Set REG 0x23 = 0x2B  //register address

SEt REG 0x24 = 0x04  //register bank

//and v-bit stop register

Set REG 0x21 = 0x00 //register data MSB

Set REG 0x22 = 0x03 //register data LSB This is V-bit stop data

Set REG 0x23 = 0x2C //register address

SEt REG 0x24 = 0x04 //register bank

Hello Larry Taylor,

Thanks alot for the replay.

I have alreday tried the below values for V-bit start and stop register values.

    // First unlock the TVP5150AM1 for this update
    ConfigTVP5150ConfigureRegis(0x21,0x51);
    ConfigTVP5150ConfigureRegis(0x22,0x50);
    ConfigTVP5150ConfigureRegis(0x23,0xFF);
    ConfigTVP5150ConfigureRegis(0x24,0x04);
    //v-bit 1 start
    ConfigTVP5150ConfigureRegis(0x21,0x00);
    ConfigTVP5150ConfigureRegis(0x22,0x01);
    ConfigTVP5150ConfigureRegis(0x23,0x2B);
    ConfigTVP5150ConfigureRegis(0x24,0x04);
    //v-bit 1 stop
    ConfigTVP5150ConfigureRegis(0x21,0x00);
    ConfigTVP5150ConfigureRegis(0x22,0x00);
    ConfigTVP5150ConfigureRegis(0x23,0x2C);
    ConfigTVP5150ConfigureRegis(0x24,0x04);

With above risgter settings i am able to move the dotted lines littile bit up.

Still i want to move those lines up can you please tell how can reduce the Reguster -0x22 value further to lowyer value.

Thanks and Regards,

Satish