Speech recognition transformer architecture processes raw audio through log-mel spectrogram feature extraction, positional encoding, and a multi-layer encoder-decoder transformer stack. Audio input flows through feature extraction and positional encoding into the transformer encoder with N layers of self-attention, then cross-attends with previous tokens in the decoder's masked self-attention and cross-attention layers. This end-to-end sequence-to-sequence model converts spoken audio directly to text transcription with attention mechanisms capturing long-range dependencies. Fork and customize this diagram on Diagrams.so to document your OCI-hosted speech recognition pipeline, adjust layer counts, or integrate with OCI Data Science services.