Input the BT.709 format in i.MX 6DQ.

[keitanagashima]

Dear Sir or Madam,

Hello.

My customer would like to input the below format into i.MX 6DQ.

====

Format : BT.709 YUV422 / 8 bit

Resolution : 720p (720 x 1280)

Frame rate : 60 fps

Bus width : 16bit (1cycle)

====

I found the below description on IMX6DQAEC(Rev.3).

"YCbCr, 16 bits—Supported as a sub-case of the YCbCr,20 bits, under the same conditions (BT.1120 protocol)"

So, above format looks support in i.MX6DQ.

[Question]

Is it possible to support the above format in i.MX6DQ?

(Is the performance, too, OK?)

Best Regards,

Keita

[igorpadykov · Accepted solution]

Hi Keita

yes this format can be supported in i.MX6DQ, performance is

described in IMX6DQRM p.2732

The input rate supported by the camera port is as follows:

For parallel interface, the maximum speed of the interface is 240Mhz. The required

operating frequency of the interface is calculated in the following way:

F = FH * FW * FPS * BI * DF

Where

• FH = frame height (in pixels)

• FW = Frame width (in pixels)

• fps = frame rate (frames per second)

• BI = typically 35% overhead, should be assumed as 1.35. The actual blanking

intervals are a parameter of the attached device.

• DF = data format, defines the number of cycles needed to send a single pixel.

The number of cycles needed to send a single pixel depends on the interface and the data

format.

Data format examples:

• YUV422 over 16 bit = 1 cycles/pixel

• RGB888 over 8 bit = 3 cycles/pixel

• RGB565 over 16 bit = 2 cycles/pixel

• Bayer/Generic data = 1 cycle/pixel

• YUV422 over 8 bit = 2 cycles/pixel

• BT.656, YUV422 format = 2 cycles/pixel

• BT.1120, YUV422 format = 1 cycle/pixel

Examples of supported interfaces:

• 3.2MP camera, 15fps, yuv422 format, 8 bit interface

• 1080P30, yuv422, 8 bit interface

Best regards

igor

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

[keitanagashima]

Hi Igor,

Hello.

Thank you very much!

Best Regards,

Keita