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Zipformer

Automatic Speech Recognition
PyTorch
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Zipformer: Optimized for Qualcomm Devices

Zipformer streaming ASR (Automatic Speech Recognition) model is a state-of-the-art system designed for transcribing spoken language into written text streamingly. This model is based on the transformer architecture and has been optimized for edge inference by replacing linear layers with convolutional (conv) layers. It exhibits robust performance in realistic, noisy environments, making it highly reliable for real-world applications. Specifically, it excels in long-form transcription, capable of accurately transcribing audios. Time to the first token is the encoder's latency, while time to each additional token is joiner's latency, where we assume a max decoded length specified below.

This is based on the implementation of Zipformer found here. This repository contains pre-exported model files optimized for Qualcomm® devices. You can use the Qualcomm® AI Hub Models library to export with custom configurations. More details on model performance across various devices, can be found here.

Qualcomm AI Hub Models uses Qualcomm AI Hub Workbench to compile, profile, and evaluate this model. Sign up to run these models on a hosted Qualcomm® device.

Getting Started

There are two ways to deploy this model on your device:

Option 1: Download Pre-Exported Models

Below are pre-exported model assets ready for deployment.

Runtime Precision Chipset SDK Versions Download
PRECOMPILED_QNN_ONNX float Snapdragon® X2 Elite QAIRT 2.45, ONNX Runtime 1.25.0 Download
PRECOMPILED_QNN_ONNX float Snapdragon® X Elite QAIRT 2.45, ONNX Runtime 1.25.0 Download
PRECOMPILED_QNN_ONNX float Snapdragon® 8 Gen 3 Mobile QAIRT 2.45, ONNX Runtime 1.25.0 Download
PRECOMPILED_QNN_ONNX float Snapdragon® 8 Gen 1 Mobile QAIRT 2.45, ONNX Runtime 1.25.0 Download
PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ QCS8550 (Proxy) QAIRT 2.45, ONNX Runtime 1.25.0 Download
PRECOMPILED_QNN_ONNX float Snapdragon® 8 Elite Mobile QAIRT 2.45, ONNX Runtime 1.25.0 Download
PRECOMPILED_QNN_ONNX float Snapdragon® 8 Elite Gen 5 Mobile QAIRT 2.45, ONNX Runtime 1.25.0 Download
PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ IQ-9075 QAIRT 2.45, ONNX Runtime 1.25.0 Download
QNN_CONTEXT_BINARY float Snapdragon® X2 Elite QAIRT 2.45 Download
QNN_CONTEXT_BINARY float Snapdragon® X Elite QAIRT 2.45 Download
QNN_CONTEXT_BINARY float Snapdragon® 8 Gen 3 Mobile QAIRT 2.45 Download
QNN_CONTEXT_BINARY float Snapdragon® 8 Gen 1 Mobile QAIRT 2.45 Download
QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ QCS8550 (Proxy) QAIRT 2.45 Download
QNN_CONTEXT_BINARY float Qualcomm® SA8775P QAIRT 2.45 Download
QNN_CONTEXT_BINARY float Snapdragon® 8 Elite Mobile QAIRT 2.45 Download
QNN_CONTEXT_BINARY float Snapdragon® 8 Elite Gen 5 Mobile QAIRT 2.45 Download
QNN_CONTEXT_BINARY float Qualcomm® SA7255P QAIRT 2.45 Download
QNN_CONTEXT_BINARY float Qualcomm® SA8295P QAIRT 2.45 Download
QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ IQ-9075 QAIRT 2.45 Download

For more device-specific assets and performance metrics, visit Zipformer on Qualcomm® AI Hub.

Option 2: Export with Custom Configurations

Use the Qualcomm® AI Hub Models Python library to compile and export the model with your own:

  • Custom weights (e.g., fine-tuned checkpoints)
  • Custom input shapes
  • Target device and runtime configurations

This option is ideal if you need to customize the model beyond the default configuration provided here.

See our repository for Zipformer on GitHub for usage instructions.

Model Details

Model Type: Model_use_case.speech_recognition

Model Stats:

  • Model checkpoint: pfluo/k2fsa-zipformer-chinese-english-mixed
  • Input resolution: 80x71 (0.71 seconds audio)
  • Max decoded sequence length: 200 tokens
  • Number of parameters (encoder): 63.2M
  • Model size (encoder) (float): 242 MB
  • Number of parameters (decoder): 3.47M
  • Model size (decoder) (float): 13.2 MB
  • Number of parameters (joiner): 3.21M
  • Model size (joiner) (float): 12.2 MB

Performance Summary

Model Runtime Precision Chipset Inference Time (ms) Peak Memory Range (MB) Primary Compute Unit
decoder PRECOMPILED_QNN_ONNX float Snapdragon® X2 Elite 0.031 ms 1 - 1 MB NPU
decoder PRECOMPILED_QNN_ONNX float Snapdragon® X Elite 0.042 ms 7 - 7 MB NPU
decoder PRECOMPILED_QNN_ONNX float Snapdragon® 8 Gen 3 Mobile 0.061 ms 0 - 7 MB NPU
decoder PRECOMPILED_QNN_ONNX float Snapdragon® 8 Gen 1 Mobile 0.103 ms 0 - 13 MB NPU
decoder PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ QCS8550 (Proxy) 0.065 ms 0 - 15 MB NPU
decoder PRECOMPILED_QNN_ONNX float Qualcomm® QCS8450 0.103 ms 0 - 13 MB NPU
decoder PRECOMPILED_QNN_ONNX float Snapdragon® 8 Elite Gen 5 Mobile 0.053 ms 0 - 7 MB NPU
decoder PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ IQ-9075 0.141 ms 0 - 3 MB NPU
decoder PRECOMPILED_QNN_ONNX float Snapdragon® 8 Elite Mobile 0.047 ms 0 - 11 MB NPU
decoder PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ Q-8750 0.047 ms 0 - 11 MB NPU
decoder PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ IQ-X7181 0.042 ms 7 - 7 MB NPU
decoder QNN_CONTEXT_BINARY float Snapdragon® X2 Elite 0.128 ms 0 - 0 MB NPU
decoder QNN_CONTEXT_BINARY float Snapdragon® X Elite 0.15 ms 0 - 0 MB NPU
decoder QNN_CONTEXT_BINARY float Snapdragon® 8 Gen 3 Mobile 0.063 ms 0 - 7 MB NPU
decoder QNN_CONTEXT_BINARY float Snapdragon® 8 Gen 1 Mobile 0.101 ms 0 - 10 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® QCS8275 0.297 ms 0 - 9 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ QCS8550 (Proxy) 0.071 ms 0 - 1 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® SA8775P 0.205 ms 0 - 6 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® SA8650P 0.205 ms 0 - 6 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® SA8255P 0.205 ms 0 - 6 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® QCS8450 0.101 ms 0 - 10 MB NPU
decoder QNN_CONTEXT_BINARY float Snapdragon® 8 Elite Gen 5 Mobile 0.046 ms 0 - 9 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ IQ-9075 0.124 ms 0 - 2 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® SA7255P 0.297 ms 0 - 9 MB NPU
decoder QNN_CONTEXT_BINARY float Snapdragon® 8 Elite Mobile 0.049 ms 0 - 13 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® SA8295P 0.311 ms 0 - 6 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ Q-8750 0.049 ms 0 - 13 MB NPU
decoder QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ IQ-X7181 0.15 ms 0 - 0 MB NPU
encoder PRECOMPILED_QNN_ONNX float Snapdragon® X2 Elite 5.539 ms 10 - 10 MB NPU
encoder PRECOMPILED_QNN_ONNX float Snapdragon® X Elite 9.263 ms 142 - 142 MB NPU
encoder PRECOMPILED_QNN_ONNX float Snapdragon® 8 Gen 3 Mobile 6.731 ms 9 - 22 MB NPU
encoder PRECOMPILED_QNN_ONNX float Snapdragon® 8 Gen 1 Mobile 12.077 ms 9 - 23 MB NPU
encoder PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ QCS8550 (Proxy) 9.049 ms 9 - 11 MB NPU
encoder PRECOMPILED_QNN_ONNX float Qualcomm® QCS8450 12.077 ms 9 - 23 MB NPU
encoder PRECOMPILED_QNN_ONNX float Snapdragon® 8 Elite Gen 5 Mobile 4.882 ms 10 - 17 MB NPU
encoder PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ IQ-9075 10.28 ms 8 - 12 MB NPU
encoder PRECOMPILED_QNN_ONNX float Snapdragon® 8 Elite Mobile 5.482 ms 9 - 20 MB NPU
encoder PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ Q-8750 5.482 ms 9 - 20 MB NPU
encoder PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ IQ-X7181 9.263 ms 142 - 142 MB NPU
encoder QNN_CONTEXT_BINARY float Snapdragon® X2 Elite 5.906 ms 3 - 3 MB NPU
encoder QNN_CONTEXT_BINARY float Snapdragon® X Elite 9.668 ms 2 - 2 MB NPU
encoder QNN_CONTEXT_BINARY float Snapdragon® 8 Gen 3 Mobile 6.578 ms 2 - 11 MB NPU
encoder QNN_CONTEXT_BINARY float Snapdragon® 8 Gen 1 Mobile 12.263 ms 3 - 13 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® QCS8275 23.493 ms 3 - 10 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ QCS8550 (Proxy) 8.852 ms 3 - 5 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® SA8775P 10.617 ms 3 - 11 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® SA8650P 10.617 ms 3 - 11 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® SA8255P 10.617 ms 3 - 11 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® QCS8450 12.263 ms 3 - 13 MB NPU
encoder QNN_CONTEXT_BINARY float Snapdragon® 8 Elite Gen 5 Mobile 4.832 ms 3 - 11 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ IQ-9075 10.096 ms 5 - 9 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® SA7255P 23.493 ms 3 - 10 MB NPU
encoder QNN_CONTEXT_BINARY float Snapdragon® 8 Elite Mobile 5.503 ms 3 - 11 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® SA8295P 13.052 ms 3 - 8 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ Q-8750 5.503 ms 3 - 11 MB NPU
encoder QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ IQ-X7181 9.668 ms 2 - 2 MB NPU
joiner PRECOMPILED_QNN_ONNX float Snapdragon® X2 Elite 0.082 ms 1 - 1 MB NPU
joiner PRECOMPILED_QNN_ONNX float Snapdragon® X Elite 0.144 ms 6 - 6 MB NPU
joiner PRECOMPILED_QNN_ONNX float Snapdragon® 8 Gen 3 Mobile 0.154 ms 0 - 7 MB NPU
joiner PRECOMPILED_QNN_ONNX float Snapdragon® 8 Gen 1 Mobile 0.238 ms 0 - 13 MB NPU
joiner PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ QCS8550 (Proxy) 0.191 ms 0 - 15 MB NPU
joiner PRECOMPILED_QNN_ONNX float Qualcomm® QCS8450 0.238 ms 0 - 13 MB NPU
joiner PRECOMPILED_QNN_ONNX float Snapdragon® 8 Elite Gen 5 Mobile 0.135 ms 0 - 7 MB NPU
joiner PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ IQ-9075 0.271 ms 0 - 3 MB NPU
joiner PRECOMPILED_QNN_ONNX float Snapdragon® 8 Elite Mobile 0.132 ms 0 - 11 MB NPU
joiner PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ Q-8750 0.132 ms 0 - 11 MB NPU
joiner PRECOMPILED_QNN_ONNX float Qualcomm® Dragonwing™ IQ-X7181 0.144 ms 6 - 6 MB NPU
joiner QNN_CONTEXT_BINARY float Snapdragon® X2 Elite 0.17 ms 0 - 0 MB NPU
joiner QNN_CONTEXT_BINARY float Snapdragon® X Elite 0.249 ms 0 - 0 MB NPU
joiner QNN_CONTEXT_BINARY float Snapdragon® 8 Gen 3 Mobile 0.138 ms 0 - 7 MB NPU
joiner QNN_CONTEXT_BINARY float Snapdragon® 8 Gen 1 Mobile 0.228 ms 0 - 9 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® QCS8275 0.48 ms 0 - 9 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ QCS8550 (Proxy) 0.18 ms 0 - 1 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® SA8775P 0.324 ms 0 - 9 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® SA8650P 0.324 ms 0 - 9 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® SA8255P 0.324 ms 0 - 9 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® QCS8450 0.228 ms 0 - 9 MB NPU
joiner QNN_CONTEXT_BINARY float Snapdragon® 8 Elite Gen 5 Mobile 0.13 ms 0 - 9 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ IQ-9075 0.234 ms 2 - 4 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® SA7255P 0.48 ms 0 - 9 MB NPU
joiner QNN_CONTEXT_BINARY float Snapdragon® 8 Elite Mobile 0.133 ms 0 - 13 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® SA8295P 0.467 ms 0 - 6 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ Q-8750 0.133 ms 0 - 13 MB NPU
joiner QNN_CONTEXT_BINARY float Qualcomm® Dragonwing™ IQ-X7181 0.249 ms 0 - 0 MB NPU

License

  • The license for the original implementation of Zipformer can be found here.

References

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