• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 34 subscribers
  • Views 705 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Video interface with digital zoom?

ngohara1991
Intellectual 555 points

Hello, 

I apologize if I am asking this in the wrong place.

I am looking for a video interface chip that can convert from parallel RGB format ( 8 to 10 bits wide RGB values from image sensor OV5640), to  LVDS (4 channel and CLK channel)  for an LCD display driver. I am currently using 1024*768 resolution displays, with my image sensor auto cropping it's video to the correct resolution. 

Can someone point me in the right direction?

I am also looking for a converter or image processor capable of providing digital zoom, that is, taking an image from video, cropping and magnifying it to original resolution, and output back in LVDS video format.

Would I be able to find functionality like this in a video converter chip, or does this require an actual GPU? 

Either way, could you point me towards the right devices?

Thank you very much for the advice.

ngohara

  • 0
    TI__Guru* 93670 points
    Greetings,

    Based on your description, normally a serializer is used to covert from 10 bits interface to 4 LVDS + clock signal. An ISP or GPU is used for video processing. I searched TI site and it seems Sitara processor has been used for ISP with this image processor(OV5640). Please check TI site for further reference on this.

    Regarding serializer, please take a look at the link below where we have multiple choices of serializers with 4D+C interface.
    www.ti.com/.../channel-link-i-products.page to 4
    Please note un-used bits can be terminated to make up 10 bits 28 or 21 bits LVCMOS interface.

    Regards,,nasser
  • 0 in reply to Nasser Mohammadi
    Intellectual 555 points

    Thank you.

    A couple of questions.

    Could you explain what channel link 1 stands for? (Or more importantly, where I can find such definition and others like it?)

    Secondly, could you perhaps link me to some code examples for the Sitara? I've a done a basic search for Sitara zoom or magnify, but nothing helpful really stood out for me to understand if this is the path I want to follow for this. 

    Thank you for any advice.

    ngohara

  • 0 in reply to ngohara1991
    TI__Genius 13475 points
    Channel Link, Flatlink, and FPD-Link are members of an interface family sometimes collectively referred to a 'LVDS'. In all cases the signal consists of several data lines, and a clock line. The physical interfaces are LVDS (differential low voltage) and there are data bits per clock cycle. This is a common interface used for display panels. National Semiconductor documented the interface as the Open LVDS Display Interface or OLDI. TI offers several different products which will convert between these interfaces and parallel, or will combine the FPD-Link interface to a single, much higher speed signal. Look on TI.COM for Flatlink/FPD-Link to get started, and read this app note: www.ti.com/.../snla045b.pdf

    For your zooming question, this is not the proper forum for that - I would look to one of the processor forums, or you might look at the media processor families from TI here:
    www.ti.com/.../products.page