LPC subframe. (c.f. <A HREF="../format.html#subframe_lpc">format specification</A>)
< The residual coding method.
< The qlp coeff shift needed.
< The FIR order.
< Quantized FIR filter coefficient precision in bits.
< Warmup samples to prime the predictor, length == order.
< FIR filter coefficients.
See Implementation
LPC subframe. (c.f. <A HREF="../format.html#subframe_lpc">format specification</A>)