han-xie/kaldi-android

Android package for Kaldi

This is still work in progress, more to come

TODO

• Integrate https://github.com/jcsilva/docker-kaldi-android build scripts and make sure it builds for all architectures (x86, armv7, arm64). Think of moving Kaldi build to cmake for quick portability.

• Build proper optimized large vocabulary model (maybe 20k words from teldium, 4-5 layers, small enough to run on mobile)

• Move to grammar decoder to avoid huge HCLG model. https://github.com/jpuigcerver/kaldi-decoders

• Load model from the AAR (mmap them in tflite style)

• Add decoding speed measurement

• Add wakeup word

• Integrate proper hardware optimized neural network library. Candidates are:

  • https://github.com/XiaoMi/mace
  • https://github.com/Tencent/ncnn
  • https://developer.android.com/ndk/guides/neuralnetworks/ (since API level 27)
  • https://github.com/google/XNNPACK

• Quantization for the models