ocvolume.audio
Class micInput

java.lang.Object
  |
  +--java.lang.Thread
        |
        +--ocvolume.audio.micInput

All Implemented Interfaces:

java.lang.Runnable

public class micInput

extends java.lang.Thread

description: continuous record voice from microphone, with at least 600ms pause in between words or discrete recording with at least 100ms in the front and end being silent default is continuous recording
calls: none
called by: volume
input: digitalize speech signal
output: speech signal stored in array

Field Summary

protected static javax.sound.sampled.AudioFormat	format audio format
protected static boolean	SAMPLE_BIG_ENDIAN use little-endian 00000100 00000001 first byte 00000001 second byte 00000100
protected static int	SAMPLE_BITS sample size - 16 bits
protected static int	SAMPLE_BUFFER_SIZE buffersize 2 seconds
protected static int	SAMPLE_CHANNELS sample channels
protected static javax.sound.sampled.AudioFormat.Encoding	SAMPLE_ENCODING encoding method "pulse-code modulation" predefined encoding
protected static float	SAMPLE_FRAME_RATE sample frame rate
protected static int	SAMPLE_FRAME_SIZE sample frame size
protected static float	SAMPLE_RATE capture amound of sample per second, can be changed in the constructor 16 kHz
protected java.util.Vector	vBufferWord word buffer

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

micInput()
Constructor

Method Summary

boolean	byteArrayComplete() return true if a word is stored in the buffer calls: none called by: volume
void	newWord() read the next element in the word buffer calls: none called by: volume
void	removeOldWord() remove the first element in the word buffer calls: none called by: volume
short	returnShort(int IndexNum) return the signed short with given index calls: none called by: volume
short[]	returnShortArray() return the signed short array calls: none called by: volume
int	returnShortSize() return the length of the array of the short array calls: none called by: volume
void	run() recording from the microphone calls: none called by: volume
void	setContinuous() set the recording method to continuous calls: none called by: volume
void	setDiscrete() set the recording method to discrete calls: none called by: volume
void	stopRecord() Stop the mic input calls: none called by: volume
int	wordBufferSize() return how many words are in the buffer calls: none called by: volume

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

SAMPLE_ENCODING

protected static final javax.sound.sampled.AudioFormat.Encoding SAMPLE_ENCODING

encoding method "pulse-code modulation" predefined encoding

SAMPLE_RATE

protected static final float SAMPLE_RATE

capture amound of sample per second, can be changed in the constructor 16 kHz

See Also:

Constant Field Values

SAMPLE_BITS

protected static final int SAMPLE_BITS

sample size - 16 bits

See Also:

Constant Field Values

SAMPLE_CHANNELS

protected static final int SAMPLE_CHANNELS

sample channels

See Also:

Constant Field Values

SAMPLE_FRAME_RATE

protected static final float SAMPLE_FRAME_RATE

sample frame rate

See Also:

Constant Field Values

SAMPLE_FRAME_SIZE

protected static final int SAMPLE_FRAME_SIZE

sample frame size

See Also:

Constant Field Values

SAMPLE_BIG_ENDIAN

protected static final boolean SAMPLE_BIG_ENDIAN

use little-endian
00000100 00000001
first byte 00000001
second byte 00000100

See Also:

Constant Field Values

SAMPLE_BUFFER_SIZE

protected static final int SAMPLE_BUFFER_SIZE

buffersize 2 seconds

See Also:

Constant Field Values

format

protected static final javax.sound.sampled.AudioFormat format

audio format

vBufferWord

protected java.util.Vector vBufferWord

word buffer

Constructor Detail

micInput

public micInput()

Constructor

Method Detail

run

public void run()

recording from the microphone
calls: none
called by: volume

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

stopRecord

public void stopRecord()

Stop the mic input
calls: none
called by: volume

wordBufferSize

public int wordBufferSize()

return how many words are in the buffer
calls: none
called by: volume

Returns:

number of words in the buffer

byteArrayComplete

public boolean byteArrayComplete()

return true if a word is stored in the buffer
calls: none
called by: volume

Returns:

true or false indicating whether a word is in the buffer

newWord

public void newWord()

read the next element in the word buffer
calls: none
called by: volume

removeOldWord

public void removeOldWord()

remove the first element in the word buffer
calls: none
called by: volume

setContinuous

public void setContinuous()

set the recording method to continuous
calls: none
called by: volume

setDiscrete

public void setDiscrete()

set the recording method to discrete
calls: none
called by: volume

returnShortSize

public int returnShortSize()

return the length of the array of the short array
calls: none
called by: volume

Returns:

length of signal

returnShort

public short returnShort(int IndexNum)

return the signed short with given index
calls: none
called by: volume

Parameters:

IndexNum - index number

Returns:

signal at given index

returnShortArray

public short[] returnShortArray()

return the signed short array
calls: none
called by: volume

Returns:

signal array