# Audio Bandwidth Extension (8→48 kHz) on VCTK (test)

Source: [Audio Bandwidth Extension (8→48 kHz) on VCTK (test)](<https://www.sota2.com/research/sota/audio-bandwidth-extension-8-48-khz-on-vctk-test>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2026-03-10T09:05:19.320Z

Evaluation of Audio Bandwidth Extension performance on the VCTK test set, specifically configured for upsampling audio from 8 kHz to 48 kHz, measured by metrics such as LSD.

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

| Scope | Recorded value |
| --- | --- |
| Task | Audio Bandwidth Extension (8→48 kHz) |
| Dataset (including any stated split) | VCTK (test) |
| Metric | LSD |
| Unit | SCALAR |
| Direction | Lower is better |
| Results loaded | 10 of 10 |
| Coverage | All results currently returned for this benchmark |

Evaluation settings may differ between results. The original papers and recorded configurations are needed to establish comparability. A shared metric name alone does not establish an identical protocol.

## Metrics

- [LSD](<https://www.sota2.com/research/sota/audio-bandwidth-extension-8-48-khz-on-vctk-test.md?metric=LSD>): Lower is better; unit: SCALAR.

- [ViSQOL](<https://www.sota2.com/research/sota/audio-bandwidth-extension-8-48-khz-on-vctk-test.md?metric=ViSQOL>): Higher is better; unit: SCALAR.

## Recorded results

| Method | LSD | Result date | Report paper |
| --- | --- | --- | --- |
| Proposed Model | 0.85 | Not recorded | 69afa5702d603e6de3e43979 |
| AP-BWE | 0.87 | Not recorded | 69afa5702d603e6de3e43979 |
| NVSR | 1.22 | Not recorded | 69afa5702d603e6de3e43979 |
| AudioSR | 1.61 | Not recorded | 69afa5702d603e6de3e43979 |
| Sinc upsampling | 3.52 | Not recorded | 69afa5702d603e6de3e43979 |

### Proposed Model

LSD: 0.85. Result ID: 69afdec86dbb7075b9586865.

[Reporting paper](<https://www.sota2.com/research/paper/69afa5702d603e6de3e43979.md>)

[Method origin paper](<https://www.sota2.com/research/paper/69afa5702d603e6de3e43979.md>)

Recorded evaluation configuration: {"Upsampling Factor":"6x","Input Sample Rate":"8 kHz","Target Sample Rate":"48 kHz"}. This record does not assert independent reproduction.

### AP-BWE

LSD: 0.87. Result ID: 69afdec86dbb7075b9586864.

[Reporting paper](<https://www.sota2.com/research/paper/69afa5702d603e6de3e43979.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa76361e209131cea6bdfe.md>)

Recorded evaluation configuration: {"Upsampling Factor":"6x","Input Sample Rate":"8 kHz","Target Sample Rate":"48 kHz"}. This record does not assert independent reproduction.

### NVSR

LSD: 1.22. Result ID: 69afdec86dbb7075b9586863.

[Reporting paper](<https://www.sota2.com/research/paper/69afa5702d603e6de3e43979.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa70c81e209131cea4d0d2.md>)

[Implementation](<https://github.com/haoheliu/ssr_eval>)

Recorded evaluation configuration: {"Upsampling Factor":"6x","Input Sample Rate":"8 kHz","Target Sample Rate":"48 kHz"}. This record does not assert independent reproduction.

### AudioSR

LSD: 1.61. Result ID: 69afdec86dbb7075b9586862.

[Reporting paper](<https://www.sota2.com/research/paper/69afa5702d603e6de3e43979.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa708e1e209131cea4bc6b.md>)

Recorded evaluation configuration: {"Upsampling Factor":"6x","Input Sample Rate":"8 kHz","Target Sample Rate":"48 kHz"}. This record does not assert independent reproduction.

### Sinc upsampling

LSD: 3.52. Result ID: 69afdec86dbb7075b9586861.

[Reporting paper](<https://www.sota2.com/research/paper/69afa5702d603e6de3e43979.md>)

Recorded evaluation configuration: {"Upsampling Factor":"6x","Input Sample Rate":"8 kHz","Target Sample Rate":"48 kHz"}. This record does not assert independent reproduction.

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