An apparatus for decoding a current block from an encoded bitstream includes a memory and a processor. The processor is configured to execute instructions stored in the memory to decode, from the encoded bitstream, a prediction mode of the current block and decode the current block using a transform type selected from a set that includes only a symmetrical discrete sine transform (SDST) and a two-dimensional discrete cosine transform (2D DCT). If the prediction mode is an inter prediction mode, the transform type used is the SDST. If the prediction mode is an intra prediction mode, the transform type used is the 2D DCT.