Julius is a high-performance, two-pass large vocabulary continuous speech recognition (LVCSR) engine.
It supports N-gram based dictation, DFA grammar based parsing, and one- pass isolated word recognition. Phone context dependencies are supported up to triphone. It can perform a multi-model decoding, a recognition using several LMs and AMs simultaneously with a single processor, and also supports “hot plugging” of arbitrary modules at run time.
The acoustic models and language models are pluggable, and you can build various types of speech recognition system by building your own models and modules to be suitable for your task. It also adopts standard formats to cope with other toolkit such as HTK, CMU-Cam SLM toolkit, etc. The core engine is implemented as embeddable library, to aim to offer speech recognition capability to various applications. The recent version supports plug-in capability so that the engine can be extended by user.
- Real-time, hi-speed, accurate recognition based on 2-pass strategy.
- Low memory requirement: less than 32MBytes required for work area (<64MBytes for 20k-word dictation with on-memory 3-gram LM).
- Supports LM of N-gram, grammar, and isolated word.
- Language and unit-dependent: Any LM in ARPA standard format and AM in HTK ascii hmmdefs format can be used.
- Highly configurable: can set various search parameters. Also alternate decoding algorithm (1-best/word-pair approx., word trellis/word graph intermediates, etc.) can be chosen.
- Full source code documentation and manual in Engligh / Japanese.
- On-the-fly recognition for microphone and network input.
- GMM-based input rejection.
- Successive decoding, delimiting input by short pauses.
- N-best output.
- Word graph output.
- Forced alignment on word, phoneme, and state level.
- Confidence scoring.
- Server mode and control API.
- Many search parameters for tuning its performance.
- Character code conversion for result output.
- Long N-gram support.
- Run with forward / backward N-gram only.
- Confusion network output.
- Arbitrary multi-model decoding in a single thread.
- Rapid isolated word recognition.
- User-defined LM function embedding.
|New to Linux? Read our Linux for Starters series.|
|The largest compilation of the best free and open source software in the universe. Supplied with our legendary ratings charts.|
|Hundreds of in-depth reviews offering our unbiased and expert opinion on software.|
|Alternatives to Google's Products and Services examines your options to migrate from the Google ecosystem with open source Linux alternatives.|
|Alternatives to Microsoft's Products and Services recommends open source Linux software.|
|Alternatives to Adobe Cloud is a new series looking at free and open source alternatives to products available from Adobe Cloud's subscription service.|
|Essential Linux system tools looks at small, indispensable utilities, useful for system administrators as well as regular users.|
|Linux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine.|
|Home computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum.|
|Now and Then examines how promising open source software fared over the years.|
|Linux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged.|
|Linux Candy opens up to the lighter side of Linux. Have some fun!|
|Best Free Android Apps. There's a strict eligibility criteria for inclusion in this series|
|These best free books accelerate your learning of every programming language|
|These free tutorials offer the perfect tonic to the free programming books series|
|Stars and Stripes is an occasional series looking at the impact of Linux in the USA|