A method of encoding digital media data performed by a digital media encoder (110; 300) by applying a lapped biorthogonal transform (600; 700), the lapped biorthogonal transform comprising an overlap filter (340; 510; 1400) and a block transform (350; 520), the block transform being applied to blocks of the digital media data and the overlap filter being applied to overlap areas overlapping adjoining blocks, the digital media data comprising audio data, image data or video data, the method comprising: re-mapping components (x i) of blocks of the digital media data into a set of vectors (v0,..., v15), wherein said re-mapping groups the components into the vectors such that at least one operation (720, 740; 1410; 1420; 1440; 1530, 1540, 1560) of the overlap filter and at least one operation (750; 1620) of the block transform is applied on the vectors on a single instruction, multiple data, SIMD, basis, wherein the vectors are 2-component vectors (v 2i, v 2i+1), and wherein the components are grouped into the 2-component vectors according to: v 2 i = x 4 i x 4 i + 1 v 2 i + 1 = x 4 i + 3 x 4 i + 2, or wherein the vectors are4-component vectors (v 0,... v 3), wherein the input data comprises 4x4 blocks of components, wherein the components of a 4x4 block are given by: x 0 x 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 x 11 x 12 x 13 x 14 x 15, and wherein the components of the 4x4 block are grouped into the 4-component vectors according to: v 0 = x 0 x 1 x 4 x 5 v 1 = x 3 x 2 x 7 x 6 v 2 = x 12 x 13 x 8 x 9 v 3 = x 15 x 14 x 11 x 10; applying the lapped biorthogonal transform to blocks of the digital media data to produce a set of transform coefficients (360, 362) for the respective blocks, wherein applying the biorthogonal lapped transform comprises applying the at least one operation of the overlap filter and the at least one operation of the block transform on a SIMD basis on the vectors; and encoding the transform coefficients in a compressed bitstream. re-mapping components (x i) of blocks of the digital media data into a set of vectors (v0,..., v15), wherein said re-mapping groups the components into the vectors such that at least one operation (720, 740; 1410; 1420; 1440; 1530, 1540, 1560) of the overlap filter and at least one operation (750; 1620) of the block transform is applied on the vectors on a single instruction, multiple data, SIMD, basis, wherein the vectors are 2-component vectors (v 2i, v 2i+1), and wherein the components are grouped into the 2-component vectors according to: v 2 i = x 4 i x 4 i + 1 v 2 i + 1 = x 4 i + 3 x 4 i + 2, or wherein the vectors are4-component vectors (v 0,... v 3), wherein the input data comprises 4x4 blocks of components, wherein the components of a 4x4 block are given by: x 0 x 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 x 11 x 12 x 13 x 14 x 15, and wherein the components of the 4x4 block are grouped into the 4-component vectors according to: v 0 = x 0 x 1 x 4 x 5 v 1 = x 3 x 2 x 7 x 6 v 2 = x 12 x 13 x 8 x 9 v 3 = x 15 x 14 x 11 x 10; applying the lapped biorthogonal transform to blocks of the digital media data to produce a set of transform coefficients (360, 362) for the respective blocks, wherein applying the biorthogonal lapped transform comprises applying the at least one operation of the overlap filter and the at least one operation of the block transform on a SIMD basis on the vectors; and encoding the transform coefficients in a compressed bitstream.