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TP3094: Analyze the output data DX

Amy Luo
Expert 6895 points

Part Number: TP3094

Hi team,

Our customer would like to collect the output data DX of PCM and analyze its spectrum to see how its performance is? What methods or tools can be used to collect and analyze DX data? Could you give any advice

  • 0
    TI__Guru 63165 points

    Hi Amy,

    The Voice PCM format that this device and other similar ones were designed for was typically interfacing with a Bluetooth module/MCU or other external peripheral in earlier telephony applications.  To acquire the DX output data you'll need to have a host processor with a PCM interface, then collect the data, and post-process using an Audio analyzer software.

    If the customer is not interested in a PCM audio interface then we have many additional options including ones with EVMs that can be used to help test the performance.

  • 0 in reply to Collin Wells
    TI__Expert 6895 points

    Hi Collin,

    Thanks a lot for your answer.

    Could you provide a link to EVM which you mentioned in your post.

    I see in the product page that this product is in 'NOT RECOMMENDED FOR NEW DESIGNS' status. I can't find any information about it.

  • 0 in reply to Amy Luo
    TI__Guru 63165 points

    Hi Amy,

    As mentioned previously this device is older and we likely have newer options.  However it is difficult to offer a selection without more information about what the customer is trying to achieve.  Please provide the following information:

    1.)  # of input channels

    2.) # of output channels

    3.)  Sampling rate

    4.)  Audio interface configuration

  • 0 in reply to Collin Wells
    Prodigy 170 points

    Hi Collin,

         About TP3094, I would like to test the performance about the output data DX of PCM and input the PCM data to DR of PCM interface to test the performance of analog output.We are very anxious.

    1)I see what you said "To acquire the DX output data you'll need to have a host processor with a PCM interface, then collect the data, and post-process using an Audio analyzer software." Could you please  recommend a host processor with a PCM interface to us?It's the best if there is the evm with a host processor.

    2)I see what you said " we have many additional options including ones with EVMs that can be used to help test the performance." Could you please recommend EVMs that can be used to help test the performance to us?

    3) It is the best if you can recommend a specific and detailed solution to test the PCM output performance?

    Looking forward to your reply！

    Best Regards,

    GUO

  • 0 in reply to user6473152
    TI__Guru 63165 points

    Hello,

    This product is not recommended for new designs and it's better if you answer the questions two threads up so we can identify a possibly better solution to you.

    1.)  You will already have a host processor with a PCM input/output, or you wouldn't be interested in this CODEC.  There is not an EVM for this product which is why we were looking to direct to another product.

    2.)  Please answer the questions two threads up and we can help direct you to an appropriate question.

    3.)  See above.

  • 0 in reply to Collin Wells
    Prodigy 170 points

    Hi Collin,

      Thanks for your reply!

      Now,I have already bought the TP3094. Our customer ask for us to test the performance of TP3094. So i have a trouble with the pcm output data.

     And we designed a test board ourselves,but our  Audio analyzer do not support the voice PCM. So my thoughts are as follows,

     1) I  do not  have a host processor with a PCM input/output, and  i want to converter voice PCM to I2S using the processor with a PCM, so I can use the Audio analyzer  to test the performance of pcm. So i want to know if you can recommend the EVMs with converting voice PCM to I2S.

    2) I see what you said"

     Please provide the following information:

    1.)  # of input channels

    2.) # of output channels

    3.)  Sampling rate

    4.)  Audio interface configuration“

      Can you recommend a similar voice PCM CODEC with EVM？

     

    1.)  # of input channels-------------------2 channels  or 4 channels

    2.) # of output channels------------------2 channels  or 4 channels

    3.)  Sampling rate-------------------------- 8khz

    4.)  Audio interface configuration“------with voice pcm interface

    Best regards!

     GUO

  • 0 in reply to user6473152
    TI__Guru 63165 points

    Hi Guo,

    Apologies, but this is still a bit perplexing regarding the PCM interface.  The reason you'd select a device with a PCM voice interface, like the TP3094, is that you have a host processor (often a bluetooth chipset) that communicates to the CODEC through a PCM interface.  If you don't have a host processor that already has the PCM interface then you may not need the TP3094 and a more standard CODEC without the PCM companding could be selected.  You should be able to get the data back out of that processor either over bluetooth, or from it's memory.

    Unfortunately, none of the devices with a PCM interface have an active EVM any longer, but the TLV320AIC1110 is a more recent device that features the PCM interface as well.

  • 0 in reply to Collin Wells
    Prodigy 170 points

    Hi Collin,

       Thanks for your detailed reply!

        About TLV320AIC1110,What I'm confused about is following:

      1) TLV320AIC1110 DATASHEET PARAMETER

    About transmit, How do i test the transmit signal to distortion in PCM interface with evm under different conditions?  What methods or tools can be used to test the transmit signal to distortion in PCM interface ?

     2) TLV320AIC1110 DATASHEET PARAMETER

      

     About receive,there is no PCM format audio file,so i can not input signal at PCMI. How do i test the receive signal to distortion in PCM interface with evm under different conditions?

    About TP3094, What I'm confused about is following:

     1)TP3094 DATASHEET PARAMETER

       About SFDx, what is meaning about "PCM code for all channels equals to positive zero"?

      

    Looking forward to your reply！

    Best Regards,

    GUO

  • 0 in reply to user6473152
    TI__Guru 63165 points

    Hello,

     1) TLV320AIC1110 DATASHEET PARAMETER

    About transmit, How do i test the transmit signal to distortion in PCM interface with evm under different conditions?  What methods or tools can be used to test the transmit signal to distortion in PCM interface ?
    [CW]:  You'll need a host processor, or an audio analyzer that includes this functionality.  There aren't any active TI Audio EVMs that support this feature.

     2) TLV320AIC1110 DATASHEET PARAMETER

     About receive,there is no PCM format audio file,so i can not input signal at PCMI. How do i test the receive signal to distortion in PCM interface with evm under different conditions?

    [CW]:  You'll need a host processor, or an audio analyzer that includes this functionality.  There aren't any active TI Audio EVMs that support this feature

    About TP3094, What I'm confused about is following:

     1)TP3094 DATASHEET PARAMETER

       About SFDx, what is meaning about "PCM code for all channels equals to positive zero"?

    [CW]:  TP3094 is NRND

  • 0 in reply to Collin Wells
    Prodigy 170 points

    HI Collin,

      Thanks for your reply!

       1) Can you recommend a host processor to help test the PCM?

       2）Can you explain the difference  between the voice PCM and the current audio PCM?

     

    Looking forward to your reply！

    Best Regards,

    GUO