com.sun.speech.freetts.util
Class WaveUtils

java.lang.Object
  com.sun.speech.freetts.util.WaveUtils

public class WaveUtils

extends java.lang.Object

Provides a set of utilities for prrocessing wave/audio data.

Constructor Summary

WaveUtils()

Method Summary

static short	bytesToShort(byte hiByte, byte loByte) Reconstructs a short from its hi and low bytes.
static void	main(java.lang.String[] args) Provides test program for method ulawToShort().
static byte	shortToUlaw(short sampleData) Converts a raw short to ulaw.
static short	ulawToShort(short uByte) Converts from ulaw to 16 bit linear.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WaveUtils

public WaveUtils()

Method Detail

shortToUlaw

public static final byte shortToUlaw(short sampleData)

Converts a raw short to ulaw.

Parameters:

sampleData - signed 16-bit linear sample

Returns:

8-bit ulaw sample, normalized

ulawToShort

public static final short ulawToShort(short uByte)

Converts from ulaw to 16 bit linear.

Craig Reese: IDA/Supercomputing Research Center
29 September 1989

References:
1) CCITT Recommendation G.711 (very difficult to follow)
2) MIL-STD-188-113,"Interoperability and Performance Standards for Analog-to_Digital Conversion Techniques," 17 February 1987

Parameters:

uByte - 8 bit ulaw sample

Returns:

signed 16 bit linear sample

bytesToShort

public static final short bytesToShort(byte hiByte,
                                       byte loByte)

Reconstructs a short from its hi and low bytes.

Parameters:

hiByte - the high byte

loByte - the low byte

Returns:

the short value

main

public static void main(java.lang.String[] args)

Provides test program for method ulawToShort().

Parameters:

args - not used