> ## Documentation Index
> Fetch the complete documentation index at: https://developer.sanas.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# SE - Standard

> Real-time speech enhancement optimized for 8kHz telephony audio

The Speech Enhancement Standard (`SE2.1`) model restores and enhances voice quality for telephony audio. It takes 16kHz input and outputs high-fidelity 8kHz audio, correcting codec degradation, packet loss, reverb, and background noise — purpose-built for contact center and telephony environments with limited CPU budgets.

## Hear the Difference

### Various Accents

<div style={{ display:"flex", gap:"0", width:"100%" }}>
  <div style={{ flex:1, paddingRight:"16px", borderRight:"1px solid #E3E3E3" }}>
    **Before** · Original audio

    <video controls={true} src="https://d3uqx5l8cluzaz.cloudfront.net/SE2.2_various_accents.wav" style={{ width:"100%",height:"54px" }} />
  </div>

  <div style={{ flex:1, paddingLeft:"16px" }}>
    **After** · Enhanced with SE Standard

    <video controls={true} src="https://d3uqx5l8cluzaz.cloudfront.net/SE2.1_output_various_accents_SE2.1.wav" style={{ width:"100%",height:"54px" }} />
  </div>
</div>

### Codec Degradation

<div style={{ display:"flex", gap:"0", width:"100%" }}>
  <div style={{ flex:1, paddingRight:"16px", borderRight:"1px solid #E3E3E3" }}>
    **Before** · Original audio

    <video controls={true} src="https://d3uqx5l8cluzaz.cloudfront.net/SE2.2_codec__female1_opus_6kbps.wav" style={{ width:"100%",height:"54px" }} />
  </div>

  <div style={{ flex:1, paddingLeft:"16px" }}>
    **After** · Enhanced with SE Standard

    <video controls={true} src="https://d3uqx5l8cluzaz.cloudfront.net/SE2.1_output_codec__female1_opus_6kbps_SE2.1.wav" style={{ width:"100%",height:"54px" }} />
  </div>
</div>

### Packet Loss

<div style={{ display:"flex", gap:"0", width:"100%" }}>
  <div style={{ flex:1, paddingRight:"16px", borderRight:"1px solid #E3E3E3" }}>
    **Before** · Original audio

    <video controls={true} src="https://d3uqx5l8cluzaz.cloudfront.net/SE2.1_packet_loss__female1_40p.wav" style={{ width:"100%",height:"54px" }} />
  </div>

  <div style={{ flex:1, paddingLeft:"16px" }}>
    **After** · Enhanced with SE Standard

    <video controls={true} src="https://d3uqx5l8cluzaz.cloudfront.net/SE2.1_output_packet_loss__female1_40p_SE2.1.wav" style={{ width:"100%",height:"54px" }} />
  </div>
</div>

### Overlapping Speech

<div style={{ display:"flex", gap:"0", width:"100%" }}>
  <div style={{ flex:1, paddingRight:"16px", borderRight:"1px solid #E3E3E3" }}>
    **Before** · Original audio

    <video controls={true} src="https://d3uqx5l8cluzaz.cloudfront.net/SE2.1_overlapped__male1.wav" style={{ width:"100%",height:"54px" }} />
  </div>

  <div style={{ flex:1, paddingLeft:"16px" }}>
    **After** · Enhanced with SE Standard

    <video controls={true} src="https://d3uqx5l8cluzaz.cloudfront.net/SE2.1_output_overlapped__male1_SE2.1.wav" style={{ width:"100%",height:"54px" }} />
  </div>
</div>

### Background Noise

<div style={{ display:"flex", gap:"0", width:"100%" }}>
  <div style={{ flex:1, paddingRight:"16px", borderRight:"1px solid #E3E3E3" }}>
    **Before** · Original audio

    <video controls={true} src="https://d3uqx5l8cluzaz.cloudfront.net/SE2.2_signal__female1.wav" style={{ width:"100%",height:"54px" }} />
  </div>

  <div style={{ flex:1, paddingLeft:"16px" }}>
    **After** · Enhanced with SE Standard

    <video controls={true} src="https://d3uqx5l8cluzaz.cloudfront.net/SE2.1_output_signal__female1_SE2.1.wav" style={{ width:"100%",height:"54px" }} />
  </div>
</div>

## Key Features

<CardGroup cols={2}>
  <Card title="Removes Noise and Speech" icon="volume-slash">
    Eliminates background noises and background speech while preserving the primary speaker.
  </Card>

  <Card title="Restores Voice Fidelity" icon="microphone">
    Restores foreground voice to high-fidelity, enhancing clarity, articulation, energy, and vocal presence.
  </Card>

  <Card title="Corrects Degradation" icon="wrench">
    Fixes codec degradation, packet loss from poor connections, reverb, and room acoustics.
  </Card>

  <Card title="Low CPU Footprint" icon="microchip">
    Designed for production environments with limited CPU resources.
  </Card>
</CardGroup>

## Specifications

**Model ID:** `SE2.1`<br />**Category:** Speech Enhancement<br />**Type:** Human ↔ Human

<CardGroup cols={2}>
  <Card title="120ms" icon="bolt">
    Streaming latency
  </Card>

  <Card title="16kHz → 8kHz" icon="waveform-lines">
    Input / Output sample rate
  </Card>
</CardGroup>

## Use Cases

<CardGroup cols={2}>
  <Card title="Contact Centers" icon="headset">
    Enhance agent-customer call quality in telephony environments with limited bandwidth.
  </Card>

  <Card title="Telephony Systems" icon="phone">
    Restore voice clarity for 8kHz telephony pipelines degraded by compression and network conditions.
  </Card>

  <Card title="IVR Systems" icon="phone-volume">
    Improve audio quality for automated phone systems operating on narrowband audio.
  </Card>

  <Card title="Voice Recording" icon="circle-dot">
    Clean up and restore archived or low-quality voice recordings.
  </Card>
</CardGroup>

<Note>
  **Known Limitations**

  * Speaker identity may occasionally differ slightly from the original.
  * Although pronunciations are unchanged, there may be a subtle perception of an Americanized accent.
</Note>

## Code Example

Create an audio processor with the SE Standard model:

```python theme={null}
audio_params = sanas_remote_sdk.AudioParams()
audio_params.modelName = "SE2.1"
audio_params.sampleRate = 16000

processor, create_result = sdk.CreateAudioProcessor(audio_params)
```

<Info>
  Input sample rate: 16 kHz. The model outputs 8 kHz optimized for telephony, but Sanas Cloud upsamples it to 16 kHz to match the input sample rate.
</Info>

For full setup and initialization, see the [Quick Start →](/Docs/Getting-Started/Quick-Start)

## Next Steps

<CardGroup cols={3}>
  <Card title="Quick Start" icon="rocket" href="/Docs/Getting-Started/Quick-Start">
    Get up and running with Sanas SDK in under 5 minutes.
  </Card>

  <Card title="API Reference" icon="book" href="/API-Reference/Overview">
    Full SDK documentation for classes, enums, and callbacks.
  </Card>

  <Card title="Processing Multiple Streams" icon="layer-group" href="/Docs/Tutorials/Processing-Multiple-Streams">
    Handle multiple concurrent audio streams.
  </Card>
</CardGroup>