White Paper


Advanced Signal Processing and FFT on Imagination Series4 Neural Network Accelerators

We present novel techniques for executing signal processing operations such as frequency domain transforms, spectrogram generation, and mel-frequency cepstral coefficients (MFCC) extraction using massively parallel operations supported by IMG Series4 neural network accelerators (NNA). By enabling the execution of a wide variety of such operations on our NNAs, we allow audio and signal preprocessing tasks, that would otherwise have to be executed elsewhere in the system, to be executed on the same device as the neural network, which has potential to reduce overall bandwidth, power and latency requirements. 

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