Mohammad Ranjbar

Mohammad Ranjbar

Speech Synthesis and Natural Language Processing Researcher

About me


I am a final-year master's student in Computer Software Engineering at the University of Tehran with a perfect 4.0/4.0 GPA, specializing in conversational AI and speech processing. My thesis research, guided by Dr. Shakery and Dr. Faili, focuses on developing zero-shot text-to-speech models for the Persian language. I have curated a comprehensive multispeaker Persian dataset comprising over 5K hours of audiobooks and podcasts, and developed advanced TTS models specifically optimized for Persian.

As a Research and Teaching Assistant at the University of Tehran's NLP Lab and Intelligent Information Systems Lab, I lead research on Persian speech synthesis and medical language models. I have designed comprehensive assignments for Machine Learning Methods in NLP and Digital Speech Processing courses, serving over 200+ students across multiple courses. Additionally, I co-founded SOFIA, where I architected and deployed a multi-platform RAG-based customer service chatbot that has achieved 20,000+ active users on University of Tehran's website.

Before my graduate studies, I earned my Bachelor's degree in Electrical Engineering from Amirkabir University of Technology (AUT), where I worked on facial expression recognition with robotic implementation under the guidance of Dr. Menhaj and Dr. Taheri. I have consistently demonstrated academic excellence, ranking in the top 0.5% in national entrance exams.


Research Interests

  • Conversational AI
  • Large Language Models
  • Multimodal AI
  • Controllable Generative Models
  • Speech Synthesis & Processing
  • Natural Language Processing

Education

  • Master of Science in Computer Software Engineering, 2022 -- Present
    University of Tehran (GPA: Perfect 4.0/4.0)
    Thesis: Zero-Shot Text-to-Speech for Persian Language
  • Bachelor of Science in Electrical Engineering, 2016 -- 2021
    Amirkabir University of Technology
    Thesis: Facial Expression Recognition with Robotic Implementation

Recent Publications & Research

  • MJ. Ranjbar, A. Shakery, H. Faili. PersianPunc: Neural Punctuation Restoration for Persian Speech Recognition and Text Processing. Under preparation, 2025.
  • MJ. Ranjbar, A.H. Sheikh, S. Ranjbar Kalahroodi, S. Karimi, A. Shakery, H. Faili. PersianMedQA: Language-Centric Evaluation of LLMs in the Persian Medical Domain. Under review at EMNLP 2025.
  • B. Mousaei Shir-Mohammad, S. Karimi, MJ. Ranjbar, et al. Stage-Aware Deep Fusion Network for Remaining Useful Life Prediction of Bearings. Under review at IEEE Transactions on Reliability, 2025.
  • MJ. Ranjbar, MB. Menhaj, H. Taheri. Social Robots: An Open-Source Framework for Personal Assistant Robots. Published in ICRoM 2022.