# Retriever: Learning Content-Style Representation as a Token-Level Bipartite Graph

## Zero-shot voice conversion samples

### Note:

1. To distinguish all the details of different conversion results, please wear headphones when listening to the following samples.

2. 'target' means the voice conversion system extracts style information directly from the utterance in this column.

3. 'authentic target' is shown for the convenience of comparison. It shows the real recording of the target speaker speaking the same sentence as source utterance. However, the voice conversion system does not use this authentic target utterance when converting the voice. Instead, other utterances spoken by the same target speaker are fed into the voice conversion system for style extraction.

### Librispeech samples

Source | Target | Converted
--- | --- | ---
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.

### System comparison (style extracted from 5 target utterances)

Source | Authentic Target | AutoVC | AdaIN-VC | FragmentVC | S2VC | Retriever(ours)
--- | --- | --- | --- | --- | --- | ---
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.

### Conversion results of using different number of style token

Source | Authentic Target | 1 style token | 5 style tokens | 10 style tokens | 60 style tokens
--- | --- | --- | --- | --- | ---
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.

### Ablation

Source | Authentic Target | Too narrow bottleneck | Too wide bottleneck | AdaIN decoder | Retriever
--- | --- | --- | --- | --- | ---
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.

### Conversion result of using different number of target utterances during inference

Source | Authentic Target | 1 target utterance | 3 target utterance | 5 target utterance | 10 target utterance
--- | --- | --- | --- | --- | ---
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.
Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element. | Your browser does not support the audio element.