{
  "id": 360914,
  "title": "Short/time Fourier Transform's Normalization",
  "url": "/competitions/g2net-detecting-continuous-gravitational-waves/discussion/360914",
  "author_name": "Cristo JV",
  "post_date": "2022-10-18T22:51:41.880000",
  "votes": 2,
  "comment_count": 1,
  "views": 0,
  "content": "<p>I have a few questions related to the <strong>normalization</strong> of the <strong>STFT's amplitudes</strong>.</p>\n<ol>\n<li>Can we compute the <strong>Energy</strong> of the signal with the <strong>sum of the squared amplitudes</strong>? Discussed in StackExchange <a href=\"https://dsp.stackexchange.com/questions/49184/stft-amplitude-normalization-librosa-library\" target=\"_blank\">Link</a></li>\n<li>How can we compute the <strong>Power</strong> of the signal?</li>\n<li>In the absence of noise, how h0 is related to the <strong>Energy</strong> or the <strong>Power</strong> of the wave.</li>\n<li>Should we <strong>normalize</strong> the STFT's amplitudes using the <strong>Energy</strong> or the <strong>Power</strong> of the signal?</li>\n</ol>\n<p>Please I will be so happy to openly discuss these questions here 😄. Thank you</p>",
  "messages": [
    {
      "id": 1994272,
      "postDate": "2022-10-18T22:51:41.880Z",
      "content": "<p>I have a few questions related to the <strong>normalization</strong> of the <strong>STFT's amplitudes</strong>.</p>\n<ol>\n<li>Can we compute the <strong>Energy</strong> of the signal with the <strong>sum of the squared amplitudes</strong>? Discussed in StackExchange <a href=\"https://dsp.stackexchange.com/questions/49184/stft-amplitude-normalization-librosa-library\" target=\"_blank\">Link</a></li>\n<li>How can we compute the <strong>Power</strong> of the signal?</li>\n<li>In the absence of noise, how h0 is related to the <strong>Energy</strong> or the <strong>Power</strong> of the wave.</li>\n<li>Should we <strong>normalize</strong> the STFT's amplitudes using the <strong>Energy</strong> or the <strong>Power</strong> of the signal?</li>\n</ol>\n<p>Please I will be so happy to openly discuss these questions here 😄. Thank you</p>",
      "rawMarkdown": "I have a few questions related to the **normalization** of the **STFT's amplitudes**.\n\n1. Can we compute the **Energy** of the signal with the **sum of the squared amplitudes**? Discussed in StackExchange [Link](https://dsp.stackexchange.com/questions/49184/stft-amplitude-normalization-librosa-library)\n2. How can we compute the **Power** of the signal?\n3. In the absence of noise, how h0 is related to the **Energy** or the **Power** of the wave.\n4. Should we **normalize** the STFT's amplitudes using the **Energy** or the **Power** of the signal?\n\nPlease I will be so happy to openly discuss these questions here 😄. Thank you",
      "votes": 2
    },
    {
      "id": 2001709,
      "postDate": "2022-10-24T08:59:56.477Z",
      "content": "<p>Hi <a href=\"https://www.kaggle.com/cristojv\" target=\"_blank\">@cristojv</a> , </p>\n<p>Thanks for taking part of the discussion.</p>\n<p>I would recommend having a look at <a href=\"https://www.kaggle.com/junkoda\" target=\"_blank\">@junkoda</a> 's <a href=\"https://www.kaggle.com/code/junkoda/basic-spectrogram-image-classification\" target=\"_blank\">kernel</a>, as it looks like it covers a few of your questions by example.</p>\n<p>Cheers,</p>",
      "rawMarkdown": "Hi @cristojv , \n\nThanks for taking part of the discussion.\n\nI would recommend having a look at @junkoda 's [kernel](https://www.kaggle.com/code/junkoda/basic-spectrogram-image-classification), as it looks like it covers a few of your questions by example.\n\n Cheers,"
    }
  ],
  "comments": [
    {
      "id": 2001709,
      "author_name": "Rodrigo Tenorio",
      "author_url": "",
      "post_date": "2022-10-24T08:59:56.477000",
      "content": "<p>Hi <a href=\"https://www.kaggle.com/cristojv\" target=\"_blank\">@cristojv</a> , </p>\n<p>Thanks for taking part of the discussion.</p>\n<p>I would recommend having a look at <a href=\"https://www.kaggle.com/junkoda\" target=\"_blank\">@junkoda</a> 's <a href=\"https://www.kaggle.com/code/junkoda/basic-spectrogram-image-classification\" target=\"_blank\">kernel</a>, as it looks like it covers a few of your questions by example.</p>\n<p>Cheers,</p>",
      "votes": 0,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "1994272": "I have a few questions related to the **normalization** of the **STFT's amplitudes**.\n\n1. Can we compute the **Energy** of the signal with the **sum of the squared amplitudes**? Discussed in StackExchange [Link](https://dsp.stackexchange.com/questions/49184/stft-amplitude-normalization-librosa-library)\n2. How can we compute the **Power** of the signal?\n3. In the absence of noise, how h0 is related to the **Energy** or the **Power** of the wave.\n4. Should we **normalize** the STFT's amplitudes using the **Energy** or the **Power** of the signal?\n\nPlease I will be so happy to openly discuss these questions here 😄. Thank you",
    "2001709": "Hi @cristojv , \n\nThanks for taking part of the discussion.\n\nI would recommend having a look at @junkoda 's [kernel](https://www.kaggle.com/code/junkoda/basic-spectrogram-image-classification), as it looks like it covers a few of your questions by example.\n\n Cheers,"
  }
}