feature_stride vs sample_stride

[tqosu]

Should I use feature_stride or sample_stride? Or both?

[sming256]

You should use both. By combining them, we can have more flexible settings for different features.

• Given a released feature, the feature_stride means the number of frames between two consecutive temporal features. In short, it refers to how many frames we extract a feature.
• sample_stride means you can further sample on a provided feature by [::sample_stride]. By default it is 1.

The real snippet_stride=feature_stride x sample_stride.

[tqosu]

Can I say the feature is always uniformly sampled?

[sming256]

What does a uniformly sampled feature mean?

[tqosu]

For a given sampled sequence, the distance between two neighboring sampled feature indexes is always a constant.

[sming256]

Yes. The distance between two neighboring features is always the same.

[tqosu]

Thanks.