8. A computer program product to detect a keyword in speech, the computer program product comprising: a non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code executable by a processor to perform an operation comprising: generating, from a sequence of spectral feature vectors of the speech, a plurality of blocked feature vector sequences, wherein each of the plurality of blocked feature vector sequences comprises a respective subset of the plurality of feature vectors, wherein each of the plurality of blocked feature vector sequences overlap adjacent blocked feature vector sequences by a predefined count of feature vector sequences; and generating, by a neural network, the plurality of blocked feature vector sequences to detect the presence of the keyword in the speech.
8. A computer program product to detect a keyword in speech, the computer program product comprising: a non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code executable by a processor to perform an operation comprising: generating, from a sequence of spectral feature vectors of the speech, a plurality of blocked feature vector sequences, wherein each of the plurality of blocked feature vector sequences comprises a respective subset of the plurality of feature vectors, wherein each of the plurality of blocked feature vector sequences overlap adjacent blocked feature vector sequences by a predefined count of feature vector sequences; and generating, by a neural network, the plurality of blocked feature vector sequences to detect the presence of the keyword in the speech. 9. The computer program product of claim 8 , the operation further comprising prior to generating the blocked feature vector sequences: receiving a speech signal comprising the speech; and performing a feature computation on the speech signal to generate the sequence of spectral feature vectors.