Contents
What is encoder in neural network?
An autoencoder is a type of artificial neural network used to learn efficient codings of unlabeled data (unsupervised learning). The autoencoder learns a representation (encoding) for a set of data, typically for dimensionality reduction, by training the network to ignore insignificant data (“noise”).
Is Seq2Seq an encoder-decoder?
Sequence-to-Sequence (Seq2Seq) problems is a special class of Sequence Modelling Problems in which both, the input and the output is a sequence. Encoder-Decoder models were originally built to solve such Seq2Seq problems.
What is an encoder in NLP?
A stack of several recurrent units (LSTM or GRU cells for better performance) where each accepts a single element of the input sequence, collects information for that element and propagates it forward. In question-answering problem, the input sequence is a collection of all words from the question.
How are encoder-decoder models used in seq2seq problems?
Sequence-to-Sequence (Seq2Seq) problems is a special class of Sequence Modelling Problems in which both, the input and the output is a sequence. Encoder-Decoder models were originally built to solve such Seq2Seq problems.
What does the second None Mean in seq2seq?
The second None means the lengths of sentences. The maximum length of setence is different from batch to batch, so it cannot be set with the exact number. One option is to set the lengths of every sentences to the maximum length across all sentences in every batch.
How does a sequence to sequence model work?
Sequence-to-sequence (seq2seq) models can help solve the above-mentioned problem. When given an input, the encoder-decoder seq2seq model first generates an encoded representation of the model, which is then passed to the decoder to generate the desired output. In this case, the input and output vectors need not be fixed in size.
Can a RNN be used as an encoder?
One RNN will be used as an encoder, and another as a decoder. The output vector generated by the encoder and the input vector given to the decoder will possess a fixed size. However, they need not be equal.