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[Complete NLP Mastery I] The Birth of Attention: Understanding NLP from RNN·Seq2Seq Limitations to Implementing Attention

We understand why Attention was needed and how it works by 'implementing it directly with code'. This lecture starts from the structural limitations of RNN and Seq2Seq models, experimentally verifies the information bottleneck problem and long-term dependency issues created by fixed context vectors, and naturally explains how Attention emerged to solve these limitations. Rather than simply introducing concepts, we directly confirm RNN's structural limitations and Seq2Seq's information bottleneck problems through experiments, and implement **Bahdanau Attention (additive attention)** and **Luong Attention (dot-product attention)** one by one to clearly understand their differences. Each attention mechanism forms Query–Key–Value relationships in what way, has what mathematical and intuitive differences in the weight calculation process, and why it inevitably led to later models naturally connects to their characteristics and evolutionary flow. We learn how Attention views sentences and words, and how each word receives importance weighting to integrate information in a form where formula → intuition → code → experiment are connected as one. This lecture is a process of building 'foundational strength' to properly understand Transformers, helping you deeply understand why the concept of Attention was revolutionary, and why all subsequent state-of-the-art NLP models (Transformer, BERT, GPT, etc.) adopt Attention as a core component. This lecture is optimized for learners who want to embody the flow from RNN → Seq2Seq → Attention not through concepts but through code and experiments.

3 learners are taking this course

  • Sotaaz
실습 중심
NLP
Attention
transformer
Python
Deep Learning(DL)
PyTorch
attention-model

What you will gain after the course

  • You can directly verify and understand the structural limitations of RNN and Seq2Seq models (information bottleneck and long-term dependencies) through experiments and code.

  • You can clearly understand the differences and evolutionary process between the two approaches by implementing Bahdanau Attention and Luong Attention from scratch.

  • You can learn how Attention views sentences and words, and how it assigns importance to each word to integrate information, through a format that connects formulas, intuition, and code.

  • You can naturally acquire the fundamental principles and historical background of Attention, which is essential for properly understanding Transformers.

  • You can understand how the components of Attention (Query, Key, Value) work and why they became the core of all subsequent LLMs.

🔥 Have you ever hit this wall while studying NLP and Attention? 🔥

  • I have no idea why RNN can't properly capture context...

  • Even after learning Seq2Seq, I still only have a vague sense of "what is the information bottleneck?"

  • I hear that Attention is important, but I just stop at "I guess it's calculating weights."

  • When looking at Transformers, the Query, Key, Value concepts make your head go completely blank.

  • I can write the implementation code... but I have no idea why it works this way.

👉 The problem wasn't you, but the way things have been explained so far.

Most lectures explain Attention as just
"a technique for calculating word weights" and leave it at that.
This breaks the flow, and even after learning about Transformers, it doesn't connect in your mind.

If you want to truly understand Attention,
you need to experience it by directly implementing the entire process leading up to the emergence of Attention.


🚀 So this lecture starts from 'The Birth of Attention'

This lecture is not simply an introduction to Attention.
RNN → Seq2Seq → Limitations of fixed context vectors → Emergence of Attention → Bahdanau/Luong implementation
This is a lecture that directly reproduces all these flows through code and experiments.

Here, there are no moments of memorization.
Instead,

  • Why RNN loses information

  • Why Seq2Seq created a bottleneck

  • Why Attention was revolutionary
    We'll implement everything from scratch and see it with our own eyes.


🎯 6 Core Weapons You Will Gain

💡 1. The ability to 'directly verify through experiments' the limitations of RNN and Seq2Seq

Why existing models couldn't capture context, understood through reproducible experiments rather than simple theory.

💡 2. Insights that connect the evolutionary flow of NLP models at a glance

The evolutionary context from RNN → Seq2Seq → Attention naturally forms in your mind.

💡 3. The power to intuitively understand how Query·Key·Value views sentences

We understand the perspective from which Attention views words and assigns importance
through a visually observable structure.

💡 4. Practical ability to 'implement Bahdanau·Luong Attention from scratch'

You will fully internalize the mathematical and philosophical differences between the two approaches through the hands-on creation process.

💡 5. Structural analysis skills to navigate research papers without getting stuck

The experience of actually building Attention makes the diagrams and equations in papers
simply read as "structures I created".

💡 6. Basic Foundation for Deep Understanding of Transformers

Understanding Attention from the ground up
makes it overwhelmingly easy to understand why Transformer·BERT·GPT have these structures.


🌱 This course is recommended for those who

  • NLP beginner to intermediate learners who want to understand Attention from the ground up

  • Developers who studied Transformer but don't get the feel for Q·K·V

  • Someone who can write implementation code but wants to understand why it works this way

  • Engineers who want to properly understand the internal mechanisms of deep learning models

  • Those who want to solidify foundational concepts in preparation for AI graduate school and research


🧠 How much prerequisite knowledge is needed?

There aren't many requirements that are essential.

  • Python Basic Syntax

  • PyTorch's basic structure (nn.Module, tensor operations)

  • Very basic understanding of vectors/matrices

That's sufficient.
The course naturally flows from basic implementation → core experiments → understanding formulas → overall flow.
It's structured so that even first-time learners can follow along sufficiently.


🚀 Now, it's time to understand the true meaning of Attention

Attention is not just a simple "weight calculation technique."
It is a major turning point that broke the structural limitations of NLP models,
and the core philosophy that all models in the Transformer era are based on.

Directly experience the limitations of RNN and Seq2Seq,
implement Bahdanau·Luong Attention yourself,
and master the complete flow of how Attention views sentences and integrates information.

Recommended for
these people

Who is this course right for?

  • NLP beginner to intermediate learners who want to fundamentally understand the background and principles behind the emergence of RNN, Seq2Seq, and Attention

  • A developer who wants to accurately master the structure of Attention by implementing it directly in code before learning about Transformers

  • Engineers who want to understand the internal mechanisms of how deep learning models work, not just simple usage

  • AI research aspirants and graduate school applicants who realize that the reason they get stuck on concepts when reading papers is due to a 'lack of foundational knowledge'

  • All developers who want to build solid foundational strength to deeply understand LLM(Transformer, BERT, GPT)

Need to know before starting?

  • Python Basic Syntax

  • PyTorch Basic Syntax

  • A very basic understanding of vector/matrix operations

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Curriculum

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13 lectures ∙ (1hr 51min)

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