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# vDSP_DCT_Type

Constants that indicate the type for a discrete cosine transform.

```
enum vDSP_DCT_Type
```

## Topics

### Discrete Cosine Transform Types

[`vDSP_DCT_Type.II`](/documentation/Accelerate/vDSP_DCT_Type/II)

A constant that specifies a type II discrete cosine transform.

[`vDSP_DCT_Type.III`](/documentation/Accelerate/vDSP_DCT_Type/III)

A constant that specifies a type III discrete cosine transform.

[`vDSP_DCT_Type.IV`](/documentation/Accelerate/vDSP_DCT_Type/IV)

A constant that specifies a type IV discrete cosine transform.


---

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