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Requirement on Video encoder and decoder devices

Category: Hardware

Hi Team,
We have below two devices requirement for the new design.
Decoder -->2 PAL analog signal to two digital video signal (ITU-R BT656 YCbCr).
Encoder --> 2 digital video signal (ITU-R BT656 YCbCr) to 2 PAL analog signal.
Kindly request you to suggest the appropriate part which is meets the above requirement.
Please do let me know for any clarification.
Regards,
Chitharanjan M

  • ADI North America will be on summer shutdown starting August 24, 2023; perhaps another community member can assist you until our return on September 5th.
  • Hi,

    Decoder:

      Please note that, We do not have a single chip which can decode 2 CVBS inputs and 1 HDMI input at the same time. Devices like the ADV7842 can handle all these inputs however only one video path can be fully active at any time.

      ADV7842 can only process one Video stream at a time.  It has multiple inputs which it can select from.

      Basically, each active stream will take one active chip. Some chips like the ADV7842 allow video muxing of the input source to be processed.

    Encoder:

       We have a number of encoders which can support digital video signal into PAL Output but none of the Part can process two inputs at a time.

    Thanks,

    Poornima 

  • HI Poornima,

    Please note that, We do not have a single chip which can decode 2 CVBS inputs and 1 HDMI input at the same time. Devices like the ADV7842 can handle all these inputs however only one video path can be fully active at any time.

      ADV7842 can only process one Video stream at a time.  It has multiple inputs which it can select from.

      Basically, each active stream will take one active chip. Some chips like the ADV7842 allow video muxing of the input source to be processed.

    We don't want the decoder which converts two different inputs like 2CVBS and 1HDMI, we have the requirement of converting 2 CVBS to two digital video signal i.eITU-R BT656 YCbCr.

    and encoder which should convert reverse of process of decoder. hope you understand my requirement.

       We have a number of encoders which can support digital video signal into PAL Output but none of the Part can process two inputs at a time.

    Can you please share this part number?

    Regards

  • Hi,

      Decoder part like ADV7842 (It has multiple inputs which it can select from and it allow video muxing of the input source to be processed), ADV7403 are the parts which can accept two CVBS input and two digital outputs but as stated our ADV part can only process one Video stream at a time.

       And note that, Analog Devices' have a number of video decoders have differential analog front ends (AFE). Differential AFEs allow our video decoders to receive differential CVBS ((PAL or NTSC) .

       Kindly refer below decoder product page and choose the part according to your requirement.

        Selection Table for Video Decoders | Parametric Search | Analog Devices

    Encoder part like ADV734x, ADV739x can do two digital input and two analog outputs.

    Please note that, We haven't try more than one IN/OUT from our end.

    Thanks,

    Poornima

  • Hi Poornima,

    Thanks for the part that you suggested, I will check the specification and revert back to you.

    And  I have selected one part ADV7281A which can convert 2 differential analog input to Digital output MIPI-CSI2. Will it convert 2 analog input to digital output at a time?

    Also please suggest the encoder which is similar to ADV7281A  part.

    Thanks,

    Chitharanjan M

  • Hi,

      And I have selected one part ADV7281A which can convert 2 differential analog input to Digital output MIPI-CSI2. Will it convert 2 analog input to digital output at a time?

          All our video decoders are single video channel parts and there is only one output bus so we would need 2 ADV part to process two inputs simultaneously similarly for 3 channels, we would need 3 ADV parts.
          Please note that "ADI does not have a chip that can handle multiple video streams at the same time.
          As far as all Analog Video decoders can only select (and thus output) one stream at a time.
          If a project requires multiple video streams simultaneously, they will need multiple video decoder parts.

    Thanks,

    Poornima

  • HI,

    Thanks for the details....

    Can you please suggest the multiple video decoder parts?

    Also please suggest the encoder part which can converts Two MIPI DSI to two analog differential output (CVBS).

    Regards,

    Chitharanjan M

  • Hi,  

    We have a chipset that can do CVBS to MIPI out, But we don't have single chip conversion for MIPI to CVBS. It will require two chip for converting MIPI to CVBS .

    Analog Devices can provide video decoder parts that will convert the NTSC analog video into a digital format (either TTL or MIPI CSI-2). The digital output from the video decoder can be fed into the microprocessor. The microprocessor can then convert the output to MIPI DSI.

    Freescale, Qualcomm, Intel and other companies have a variety of microprocessors that can output MIPI DSI.

    Thanks,

    Poornima

  • Hi poornima,

    Thanks for the details....

    "But we don't have single chip conversion for MIPI to CVBS"

    OK do you have any chip which is converting differential signals like (EX:LVDS) to Analog Signal (Differential)? If so please suggest the part.(Analog out should support differential signal like decoder ADV7281A 

    I have checked your product page in the encoder section and I have not get any part which is supporting LVDS to analog. I'm seeing the part which only converting HDMI, Pixel parallel data to analog in the product selection page.

    If the above one is not available, what would be the best option if we go with two chip considering our requirement?

    Regards,

    Chitharanjan M

  • Hi Poornima,

    Please ignore the below reply

    We have finalized the decoder part ADV7403(analog to 30bit pixel data), similarly I have found encoder part ADV7344 which is not recommended for New design.

    Can you please suggest the alternate part for ADV7344?

    Regards,

    Chitharanjan M