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

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

where $P$ is frame period and $\mathrm{\forall }t<0,t\ge Tx(t)=0$. If -n 1 is specified, the output is

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

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:

• argc – [in] Number of arguments.

• argv – [in] Argument vector.

Returns:

0 on success, 1 on failure.

See also

window