Linear Prediction analysis (From the 'wrassp' package)
rfcana.Rdrfcana function adapted from libassp
Usage
rfcana(
listOfFiles = NULL,
optLogFilePath = NULL,
beginTime = 0,
centerTime = FALSE,
endTime = 0,
windowShift = 5,
windowSize = 20,
effectiveLength = TRUE,
window = "BLACKMAN",
order = 0,
preemphasis = -0.95,
lpType = "RFC",
toFile = TRUE,
explicitExt = NULL,
outputDirectory = NULL,
forceToLog = useWrasspLogger,
verbose = TRUE
)Arguments
- listOfFiles
vector of file paths to be processed by function
- optLogFilePath
path to option log file
- beginTime
= <time>: set begin of analysis interval to <time> seconds (default = 0: begin of file)
- centerTime
set single-frame analysis with the analysis window centred at <time> seconds; overrules beginTime, endTime and windowShift options
- endTime
= <time>: set end of analysis interval to <time> seconds (default = 0: end of file)
- windowShift
= <dur>: set analysis window shift to <dur> ms (default: 5.0)
- windowSize
= <dur>: set analysis window size to <dur> ms; overrules effectiveLength option
- effectiveLength
make window size effective rather than exact
- window
= <type>: set analysis window function to <type> (default: BLACKMAN)
- order
= <num>: set prediction order to <num> (default: sample rate in kHz + 3)
- preemphasis
= <val>: set pre-emphasis factor to <val> (default: -0.95)
- lpType
= <type>: calculate <type> LP parameters; <type> may be: "ARF": area function "LAR": log area ratios "LPC": linear prediction filter coefficients "RFC": reflection coefficients (default)
- toFile
write results to file (default extension dependent on LpType .arf/.lar/.lpc/.rfc)
- explicitExt
set if you wish to override the default extension
- outputDirectory
directory in which output files are stored. Defaults to NULL, i.e. the directory of the input files
- forceToLog
is set by the global package variable useWrasspLogger. This is set to FALSE by default and should be set to TRUE is logging is desired.
- verbose
display infos & show progress bar
Details
Linear Prediction analysis of <listOfFiles> using the autocorrelation method and the Durbin recursion. This program calculates the RMS amplitudes of the input and residual signal in dB and, per default, reflection coefficients (see '-t' option). Analysis results will be written to a file with the base name of the input file and the parameter type in lower case as extension (e.g. '.rfc'). Default output is in SSFF binary format (tracks 'rms', 'gain' and the LP type in lower case).