Show HN: TeletextSignals – Local RAG over 25 Years of Swiss Teletext News
folli Thursday, January 15, 2026
I built TeletextSignals, a local RAG + LLM experiment over ~25 years of Swiss teletext news in German-language.
Teletext is a TV broadcast system that delivers highly concise, space-constrained news texts. That conciseness turns out to be a real advantage for semantic search and retrieval: dense information, little fluff, and consistent structure over decades.
The project runs fully offline and uses embeddings + Postgres/pgvector to explore, search, and query teletext news from the last 25 years with modern LLM techniques.
Repo: https://github.com/r-follador/TeletextSignals
Summary
The article describes a project that aims to decode and display Teletext signals, a legacy data transmission technology used in analog television broadcasts. The project involves building a hardware device to capture and process Teletext data, which can then be displayed on a modern computer or device.
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