AI Mathematics
Hello, this is the Qualiteg Research Team. Today we would like to take up a topic that is unglamorous but critically important in practice: "extending a strong, already-finished model without breaking it." If you work in machine learning, "we have a model we carefully polished once, and
AI Mathematics
Hello. This is the Qualiteg Research Team. We work on technology for detecting and masking sensitive information — personal information (PII), confidential information, and special-care-required personal data (https://pii-fi.com). In that work, the question we face every day is: 「how can we talk about accuracy figures honestly and correctly」 ? Suppose,
LLM Security
Hello! This is the Qualiteg Research Team. Automatic detection of personally identifiable information (PII) can be framed as the problem of extracting specific expressions from text and determining which type of PII each one represents. As the range of PII types to detect grows — phone numbers, personal names, account numbers,
AI Mathematics
Hello! "Apparently this puzzle appears in AI textbooks." The sliding puzzle you played with as a kid. Actually, it is plenty of fun for adults too. You know the one—you click numbered tiles around until they line up. Did you know this simple puzzle was one of
Generative AI Frontlines
Why can't the Transformer that powers GPT simply be dropped into lipsync? We unpack three challenges — data, computation, and overfitting — how to choose between LSTMs and Transformers in practice, and transfer learning as a third option, in a dialogue between Professor Quo and Manabu.
AI Mathematics
Hello! Our lipsync technology series is finally entering its home stretch. Last time (Part 4), we took a detailed look at the LSTM training process and its limits. While we saw the LSTM's strength of learning effectively even from limited data, it also became clear that it struggles
AI Mathematics
1. Position Loss (L_position) - Accuracy of the Mouth Shape Time Mouth opening Truth Predicted L_position = Σᵢ wᵢ × ||y_pred - y_true||² Computes the difference between predicted and ground-truth values at each time step. Important parameters (jaw opening, mouth opening) receive larger weights. jaw_open: ×2.0
AI Mathematics
Hello! In the previous installments of this series, we covered * how audio features are extracted with wav2vec (Part 1) and * how to correct cumulative drift in lipsync production (Part 2) . This time, we finally step into the heart of the matter: integrating these techniques to actually generate mouth movements from
AI Mathematics
Hello! In the previous article, we explained the lipsync technology used in our MotionVox service, focusing on how audio features are extracted with wav2vec. You should now have a good grasp of the foundational technology for predicting accurate mouth movements from speech. This time, as a sequel, we focus on
AI Mathematics
Hello! Today I would like to give a comprehensive overview of lipsync technology, which we actually use in our MotionVox product. Lipsync technology, which generates natural mouth movements synchronized to speech, is an important technology for AI avatars and 3D animation production. In this article, we take a technical deep
AI Mathematics
Hello! Today we walk through the algorithms and know-how behind stabilizing auto-framed video. Chapter 1: Background and Objectives When shooting bust-up video — especially talk footage for online meetings or YouTube — natural movements such as nodding or shaking the head often cause the neck area and shoulders to shift up and
AI Mathematics
Hello! This is the Qualiteg Research Team! Today we will explore information theory—a concept that is also extremely important in AI—using "Hit & Blow," a game included in the popular Nintendo Switch title "Clubhouse Games: 51 Worldwide Classics," as our subject! Introduction "Hit
IT & AI Technology
Maximum Supported Users Calculator Calculates the maximum number of users supported by a GPU conversion server that can process only one job at a time Processing time (t_p) min/job Time required for one conversion job Target system utilization (ρ) 0 to 1 Target utilization for stable operation (recommended:
AI Mathematics
Hello! Today I'd like to explain EMA*, which plays an important role in image generation, video generation, and other models. It also serves us well in MotionVox™, our AI avatar video generation service. That said, EMA is not a technique exclusive to image generation. It has become a
AI Mathematics
Hello from the Qualiteg Research Team! Today we explain Direct Preference Optimization (DPO)—proposed in 2023 by the research team of Rafael Rafailov, Archit Sharma, and colleagues—from the fundamentals through to its applications. The method was introduced in the paper "Direct Preference Optimization: Your Language Model is Secretly
IT & AI Technology
Hello! This is the Qualiteg Research Team! Today we would like to talk about image generation technology. As many of you know, AI-based image generation technology has evolved rapidly over the past decade. It is now 2024—exactly ten years since GANs were introduced in 2014. While text-based generative AI