tf.raw_ops.BlockLSTM | TensorFlow v2.16.1 (original) (raw)

tf.raw_ops.BlockLSTM

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Computes the LSTM cell forward propagation for all the time steps.

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Compat aliases for migration

tf.compat.v1.raw_ops.BlockLSTM

tf.raw_ops.BlockLSTM(
    seq_len_max,
    x,
    cs_prev,
    h_prev,
    w,
    wci,
    wcf,
    wco,
    b,
    forget_bias=1,
    cell_clip=3,
    use_peephole=False,
    name=None
)

This is equivalent to applying LSTMBlockCell in a loop, like so:

for x1 in unpack(x):
  i1, cs1, f1, o1, ci1, co1, h1 = LSTMBlock(
    x1, cs_prev, h_prev, w, wci, wcf, wco, b)
  cs_prev = cs1
  h_prev = h1
  i.append(i1)
  cs.append(cs1)
  f.append(f1)
  o.append(o1)
  ci.append(ci1)
  co.append(co1)
  h.append(h1)
return pack(i), pack(cs), pack(f), pack(o), pack(ci), pack(ch), pack(h)

Args
seq_len_max	A Tensor of type int64. Maximum time length actually used by this input. Outputs are padded with zeros beyond this length.
x	A Tensor. Must be one of the following types: half, float32. The sequence input to the LSTM, shape (timelen, batch_size, num_inputs).
cs_prev	A Tensor. Must have the same type as x. Value of the initial cell state.
h_prev	A Tensor. Must have the same type as x. Initial output of cell (to be used for peephole).
w	A Tensor. Must have the same type as x. The weight matrix.
wci	A Tensor. Must have the same type as x. The weight matrix for input gate peephole connection.
wcf	A Tensor. Must have the same type as x. The weight matrix for forget gate peephole connection.
wco	A Tensor. Must have the same type as x. The weight matrix for output gate peephole connection.
b	A Tensor. Must have the same type as x. The bias vector.
forget_bias	An optional float. Defaults to 1. The forget gate bias.
cell_clip	An optional float. Defaults to 3. Value to clip the 'cs' value to.
use_peephole	An optional bool. Defaults to False. Whether to use peephole weights.
name	A name for the operation (optional).

Returns
A tuple of Tensor objects (i, cs, f, o, ci, co, h).
i	A Tensor. Has the same type as x.
cs	A Tensor. Has the same type as x.
f	A Tensor. Has the same type as x.
o	A Tensor. Has the same type as x.
ci	A Tensor. Has the same type as x.
co	A Tensor. Has the same type as x.
h	A Tensor. Has the same type as x.