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Everything about Positional encoding

Deep learning technique

In deep learning, the positional encoding or position embedding is a component of sequence models, especially Transformers. Input data such as text, images, or audio is converted to a sequence of numerical representations called tokens, and the position of each token is encoded as a vector. Positional encoding is used because the standard attention mechanism used in Transformers by default treats all tokens symmetrically over all positions, thus effectively treating the input as a bag of tokens, rather than a sequence of tokens. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Positional encodingA 5-minute orientation
  2. Skim a recent paper: Improving position encoding of transformers for multivariate time series classificationInfluential work since 2022
  3. Pick up a classic book: Communications, Signal Processing, and SystemsThe most-reprinted book on the subject
  4. Read the landmark paper: Encoding and decoding of positional information in morphogen-dependent patterningCited 37 times
  5. Go sideways: BERT (language model)A closely related topic
  6. Go sideways: Transformer (deep learning)A closely related topic

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