frame

Functions

int main(int argc, char *argv[])

frame [ option ] [ infile ]

-l int
- frame length \((1 \le L)\)
-p int
- frame period \((1 \le P)\)
-n int
- framing type
  - 0 the beginning of data is the center of the first frame
  - 1 the beginning of data is the start of the first frame
-z
- perform mean subtraction in a frame
infile str
- double-type data sequence
stdout
- double-type framed data sequence

If the input is

\[ \begin{array}{c} \{x(t)\}_{t=0}^{T-1} \end{array} \]

and the frame length \(L\) is even, the output is

\[ \begin{array}{cccc} \{x(t)\}_{t=-L/2}^{t=L/2-1}, & \{x(t)\}_{t=P-L/2}^{t=P+L/2-1}, & \{x(t)\}_{t=2P-L/2}^{t=2P+L/2-1}, & \ldots \end{array} \]

where \(P\) is frame period and \(\forall t < 0, t \ge T \; x(t)=0\). If -n 1 is specified, the output is

\[ \begin{array}{cccc} \{x(t)\}_{t=0}^{t=L-1}, & \{x(t)\}_{t=P}^{t=P+L-1}, & \{x(t)\}_{t=2P}^{t=2P+L-1}, & \ldots \end{array} \]

The below example extracts LPC coefficients with 25-ms length window and 5-ms shift.

frame -l 400 -p 80 < data.d | window -l 400 | lpc -l 400 > data.lpc

Parameters:

Returns:

0 on success, 1 on failure.