# vDSP.DCT A single-precision discrete cosine transform. ``` class DCT ``` ## Topics ### Initializers [`init?(previous: vDSP.DCT?, count: Int, transformType: vDSP.DCTTransformType)`](/documentation/Accelerate/vDSP/DCT/init(previous:count:transformType:)) Initializes a new discrete cosine transform instance. ### Instance Methods [`func transform(U) -> [Float]`](/documentation/Accelerate/vDSP/DCT/transform(_:)) Returns the single-precision real discrete cosine transform. [`func transform(U, result: inout V)`](/documentation/Accelerate/vDSP/DCT/transform(_:result:)) Computes an out-of-place single-precision real discrete cosine transform. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)