Each TCN layer is a causal 1D convolution with dilation d. Dilation skips d−1 positions between kernel taps, exponentially expanding the receptive field without increasing parameters.
vs RNN: TCN processes all positions in parallel (no sequential dependency). Training is faster and gradients don't vanish.
Temporal Convolutional Networks replace recurrence with dilated causal convolutions. Causal means the network cannot look at future time steps - each output only depends on current and past inputs. Dilation exponentially expands the receptive field: with dilation rates 1, 2, 4, 8, a stack of 4 layers covers 16 time steps. TCNs train faster than LSTMs (fully parallel) and often match or exceed them on sequence tasks.
See causal convolution: the leftward-only connectivity pattern that ensures no future information leaks into predictions
Watch dilation in action: dilation=2 skips every other input, dilation=4 skips every 3 - receptive field doubles with each layer
Compare receptive field growth: 4 layers with dilation 1,2,4,8 vs 4 layers of standard convolution - the difference is dramatic
Understand why TCNs train faster than RNNs: all time steps are computed in parallel, no sequential dependency
Learn residual connections in TCNs: skip connections from input to output of each block prevent vanishing gradients
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