Hybrid Transform In Video Codecs

Decoding an encoded video stream may include identifying an encoded block identifying an intra prediction mode for decoding the encoded block from the encoded video stream, identifying a transform mode from a plurality of transform modes for decoding the encoded block based on the intra prediction mode, identifying a probability model from a plurality of probability models for decoding the encoded block based on the transform mode, identifying a scan mode for decoding the encoded block based on the transform mode, generating a decoded block by decoding the encoded block using the scan mode, the probability model, the transform mode, and the intra prediction mode, and outputting or storing the decoded block.