How AI Translation Works
AI translation turns text into numbers, learns patterns across languages, and generates translated text by predicting one word at a time.
22 min 11 scenes
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Technology & Computing
AI, programming, data, computing, and the internet.
How AI Video Generation Works
A clear mental model of how text-to-video AI systems turn noise into coherent motion, frame by frame.
22 min 11 scenes
How AI Writes: Inside Language Models
You can explain how large language models generate text one token at a time, why the same prompt can produce different outputs, and where those words actually come from.
20 min 10 scenes
How AI Voice Cloning Works
A clear mental model of how AI voice cloning turns a short audio sample into a convincing synthetic voice, from raw waveform to learned speaker identity to generated speech.
22 min 11 scenes
How Self-Driving Cars Think
A self-driving car perceives the world through sensors, builds a model of its surroundings, predicts what others will do, and plans a safe path step by step.
22 min 11 scenes
How AI Image Generation Works
A clear mental picture of how diffusion-based AI image generators turn noise and text into coherent images, and why prompt design matters.
22 min 11 scenes
How Does ChatGPT Actually Work?
ChatGPT is a large neural network that predicts the next word in a sequence, trained first on huge amounts of text and then refined with human feedback, so its replies are shaped predictions rather than looked-up facts.
18 min 9 scenes
How Does Facial Recognition Work?
Facial recognition works by detecting a face, mapping its features into a numerical embedding vector, and matching identities by computing similarity in that vector space.
18 min 9 scenes
Anatomy of a QR Code: What Shapes the Pattern?
How QR code version controls module count, how mask patterns sculpt the dark/light texture of the data area without changing the data, and how data mode rewrites which characters are converted into bits.
16 min 8 scenes
How Does a QR Code Work?
A QR code stores data as a grid of black and white modules wrapped in finder patterns, timing strips, and Reed–Solomon error correction, letting a camera locate the code, sample each module, and reconstruct the message despite damage.
18 min 9 scenes
How Netflix Knows What You'll Watch Next
Recommending one title from a catalog of thousands comes down to comparing patterns across millions of viewers, scoring each candidate against your taste, and ranking the results.
16 min 8 scenes
How Does Wi-Fi Work?
Wi-Fi transmits data by encoding digital information onto radio waves on specific frequency bands (2.4 GHz and 5 GHz); a router and device take turns broadcasting on shared channels, using protocols like CSMA/CA to avoid stepping on each other's signals.
18 min 9 scenes
How Does Your Phone Know Where You Are?
That your phone pins down your position by timing signals from multiple satellites and solving for the one point in 3D space where those timing measurements agree.
18 min 9 scenes
How Does Spotify Recommend Music?
Spotify's recommendations come from blending collaborative filtering (users similar to you liked these songs), content-based analysis (the audio features of songs you enjoy), and contextual signals — with collaborative filtering doing most of the heavy lifting.
18 min 9 scenes
The Friendship Paradox
The Friendship Paradox follows directly from averaging over a network: high-degree nodes are sampled more often, so the mean degree of a random friend exceeds the mean degree of a random person.
16 min 8 scenes
The Birthday Paradox in the Real World
The birthday paradox connects a counterintuitive probability result to the practical sizing of hash outputs, showing why cryptographers treat 'find any collision' attacks as roughly square-root cheaper than 'find a specific match.'
18 min 9 scenes
The Rise of Neural Networks
The story of how neural networks survived a bitter AI winter to become the engine of today's artificial intelligence.
22 min 11 scenes
Why is Euler's Number So Special?
e is the unique base in which a function equals its own derivative, so it is the natural language for any process whose rate of change equals its current size.
18 min 9 scenes
What Is i? Code It in Python and See
i is √(−1), and when you treat it as code rather than algebra its meaning becomes a visible 90° rotation that gives complex numbers their 2D geometry.
18 min 9 scenes
Why Does Ice Float?
Water's hydrogen bonds force molecules into a spacious hexagonal lattice when they freeze, so solid water is less dense than its liquid form — and density is what decides what floats.
18 min 9 scenes
How a Digital Street Decides Who's Neighbors
That a digital street is a chosen distance metric, and that the clusters you find are the shapes that metric carves out — not an objective truth about the data.
16 min 8 scenes
推荐算法：越懂你，为何越无聊
推荐算法通过不断强化你过去的点击偏好来提高准确率，但这种'利用'机制会主动压缩探索空间，导致兴趣范围越来越窄，从而产生熟悉又无聊的矛盾体验。
8 min 4 scenes
输入法怎么猜到下一个词
中文拼音输入法“猜下一个词”的本质，是把“当前上下文片段”和“个人历史词频”同时折算成每个候选词的得分，再按分排序把前几位推上候选栏。
16 min 8 scenes
Reading a Stress-Strain Curve
A stress-strain curve plots stress against strain and reveals the four stages of a solid's mechanical response: elastic deformation, yielding, plastic deformation, and fracture, each marked by a recognizable feature on the curve.
16 min 8 scenes