Zipformer

Transformer‑based automatic speech recognition (ASR) model for English and Chinese language.

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.

Technical Details

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

Applicable Scenarios

  • Smart Home
  • Accessibility

Supported Form Factors

  • Phone
  • Tablet
  • IoT

License

Tags

  • foundation

Supported Devices

  • QCS8275 (Proxy)
  • QCS8450 (Proxy)
  • QCS8550 (Proxy)
  • QCS9075 (Proxy)
  • SA7255P ADP
  • SA8295P ADP
  • SA8775P ADP
  • Samsung Galaxy S21
  • Samsung Galaxy S21 Ultra
  • Samsung Galaxy S21+
  • Samsung Galaxy S22 5G
  • Samsung Galaxy S22 Ultra 5G
  • Samsung Galaxy S22+ 5G
  • Samsung Galaxy S23
  • Samsung Galaxy S23 Ultra
  • Samsung Galaxy S23+
  • Samsung Galaxy S24
  • Samsung Galaxy S24 Ultra
  • Samsung Galaxy S24+
  • Samsung Galaxy S25
  • Samsung Galaxy S25 Ultra
  • Samsung Galaxy S25+
  • Samsung Galaxy Tab S8
  • Snapdragon 8 Elite Gen 5 QRD
  • Snapdragon X Elite CRD
  • Snapdragon X Plus 8-Core CRD
  • Xiaomi 12
  • Xiaomi 12 Pro
  • XR2 Gen 2 (Proxy)

Supported Chipsets

  • Qualcomm® QCS8275 (Proxy)
  • Qualcomm® QCS8550 (Proxy)
  • Qualcomm® QCS9075 (Proxy)
  • Qualcomm® SA7255P
  • Qualcomm® SA8295P
  • Qualcomm® SA8775P
  • Snapdragon® 8 Elite Mobile
  • Snapdragon® 8 Elite Gen 5 Mobile
  • Snapdragon® 8 Gen 1 Mobile
  • Snapdragon® 8 Gen 2 Mobile
  • Snapdragon® 8 Gen 3 Mobile
  • Snapdragon® 888 Mobile
  • Snapdragon® X Elite
  • Snapdragon® X Plus 8-Core

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