nguyen thi huong lien - hirota lab 1/10 echo hiding using exponential time-spread echo kernel...
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Nguyen Thi Huong Lien - Hirota Lab 1/10
Echo Hiding using Exponential Time-spread Echo Kernel (ETEK-EH) and Its Applications to Audio Digital Watermarking and Speaker Recognition
ProposedETEK - EH
Digital Watermarkingfor Music
Two channel DW based on ETEK-EH & LSB
Speaker Recognition System
•Trapezoid Fuzzy Similarity•Personal Identification Voice•ETEK-EH
Overview
Application 1
Application 2
(A data hiding method)
Nguyen Thi Huong Lien - Hirota Lab 2/10
=
input output
original signal echo kernel echoed signal
(a) embedding process
original signal
echo
2( )lh
+
t
t
t
originalsignal
echo signal
1d
(b) 1 kernel
2( )2
lx
K
originalsignal
echo signal
(c) 0 kernel0d
2( )2
lx
K
2i
EH [D. Gruhl et al, 1996]
Conventional Echo Hiding
Nguyen Thi Huong Lien - Hirota Lab 3/10
Echo Hiding using Exponential Time-spread Echo Kernel (ETEK-EH)
i
originalsignal
echoesp
1KpK
Exponentialtime-spreadecho kernel
delay
Single Echo Method[D. Gruhl et al, 1996]
Room Reverberation
originalsignal
echo signal
(c) 0 kernel0d
2( )2
lx
K
2i
Single echo kernel
Nguyen Thi Huong Lien - Hirota Lab 4/10
ETEK-EH: Experimental ResultsRetrieval rate and Sound quality
Music Data: 10 clips (44.1 kHz, 30s~90s)
Embedded Information: 26x26 image
Accuracy Rate
0
20
40
60
80
100
1 2 3 4 5 6 7 8 9 10
Music clip
Per
cent
age
(%)
従来法提案法
Conventionalmethod
Proposedmethod
Single echo
ETEK
Retrieval rate comparison of the proposed method and conventional single echo method on 10 music clips
Retrieval Rate
Music Clip
Per
cen
tage
(%
)
1
2
3
4
5The proposed method=4.57
The conventional method=3.86
(7 young peopleSONY, MDR-CD900ST)
Sound evaluation
Nguyen Thi Huong Lien - Hirota Lab 5/10
Application to Digital Audio Watermarking:Two Channel Digital Watermarking for Music based on ETEK
Easy copy
Copyright Problems Robustness
Capacity
Digital Watermarking: Trade-off
Embedding Process2channelseparation
Segment-tation
Segment-tation
Method 1
Method 2based on
ETEK
Encoding
Re-segment
Re-segment
2channelunification
originalmusic signal watermarked
music signal
watermark
watermarklength
watermarkbits
Extracted watermarks: (a) channel 1 (b) channel 2
Imperceptibility
Nguyen Thi Huong Lien - Hirota Lab 6/10
ExperimentsComparison Methods & Measurement
1. Least Significant Bit [Yeh, 2004]2. Single EH [Gruhl, 1996]3. Multiple EH [Oh, 2001]4. Negative EH [Foo, 2001]5. Backward and Forward EH [Kim, 2003]6. ETEK-2 Channel Method
30 clips (8 genres, 44.1 kHz, 16bit)
Watermarking using 6 methods
Applying SMBA 42 attacks
Sound EvaluationObjective Difference Grade ( ODG)
[ITU-R BS.1387, 2001]EAQUAL Software
Robustness against AttacksStirMark Benchmark for Audio (SMBA)
[Andreas, 2005]42 attacks
Measurements for comparing different methods
Nguyen Thi Huong Lien - Hirota Lab 7/10
Two Channel Digital Watermarking for Music based on ETEK:Experiment Results
LSB [Yeh, 2004] Single EH [Gruhl, 2001] Multiple EH [Oh, 2001]
Negative EH [Foo, 2001] Backward & Forward EH [Kim, 2003]
Proposed ETEK-2channel
Nguyen Thi Huong Lien - Hirota Lab 8/10
Application to Speaker RecognitionSpeaker Recognition based on PIV & TFS
8/16
Nearest Centroid Neighbor
TFS=Trapezoid Fuzzy Similarity
Personal Identification Voice (PIV)=
Record 3 times/person8 voice features
Proposal
Application
Voice from 24 users/ 3 times
Similarity
mean
½ range
½ range
0
1
,i jA,i jB
,i jD,i jC,i jE jx
Increase recognition accuracy
Nguyen Thi Huong Lien - Hirota Lab 9/10
Application to Speaker Recognition Security Enhancement for SR by ETEK-EH
9/16
Watermark exists
Fail
Proposal
Nguyen Thi Huong Lien - Hirota Lab 10/10
Conclusion
Two channel DW based on ETEK & LSB
for Music
ETEK for EHSpeaker Recognition System
Improve security of SRby ETEK
Digital Watermarking: EH with ETEK: robust against
attacks, natural sound quality Copyright Protection for Music
Speaker Identification: New features, trapezoid fuzzy
similarity: better performance ETEK to improve security for SR
A data hiding method
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