How to convert pre-trained deepspeech-0.9.3-models.tflite from float32 to int8 or int16?

I want to run deepspeech.tflite on NPU and need to get deepspeech-0.9.3-models.tflite in int8 or int16 format. How can I use existing deepspeech-0.9.3-models.tflite float32 type to get an int type?