Sorina Dumitrescu (Ph.D., Univ. of
Bucharest)
Professor Department of Electrical & Computer
Engineering Hamilton, Ontario, Canada,
L8S 4K1 phone: 905 525-9140 ext 26486 fax: 905 521-2922 email: dumitrs@mcmaster.ca |
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RESEARCH INTERESTS
My general research interests are in data compression and communication.
Some current
research projects are in the following areas:
-
Distributed quantization for machine
learning applications
-
Resource allocation for non-orthogonal
multiple access communication systems
-
Partial/Selective/Perceptual encryption of
images
Past research
projects
involved:
-
Multiple-description source coding
-
Distributed source coding
-
Robust multimedia coding
-
Image compression and transmission
-
Joint source-channel coding/decoding
-
Network coding
-
Steganalysis
_______________________________________________________________________________________________________________________________
AWARDS
NSERC University
Faculty Award (2007-2012)
__________________________________________________________________________________________________________________________
BIO
Sorina Dumitrescu (formerly Vicolov)
received the B. Sc. and Ph. D. degrees in mathematics from the University of
Bucharest, Romania, in 1990 and 1997, respectively. From 2000 to 2002 she was a
Postdoctoral Fellow in the Department of Computer Science at the University of
Western Ontario, London, Canada. Since 2002 she has been with the Department of
Electrical and Computer Engineering at McMaster University, Hamilton, Canada,
where she held a postdoctoral position (2002-2004), a Research Associate
position (2004-2005), and where she is currently a Professor. Her current
research interests include multimedia coding and communications, robust image
coding, network-aware data compression, multiple description codes,
quantization, joint source-channel coding, steganalysis. Her earlier research
interests were in formal languages and automata theory. Dr. Dumitrescu was a
recipient of the NSERC University Faculty Award (April 2007- March 2012).
__________________________________________________________________________________________________________________________
PUBLICATIONS
Google
Scholar citation profile
Book
N. Sarshar, X. Wu, J. Wang, and S. Dumitrescu,
Network-aware Source Coding and Communication, Cambridge University Press,
Sept. 2011, ISBN 13:9780521888400, http://www.cambridge.org/aus/catalogue/catalogue.asp?isbn=9780521888400
Refereed Journal Papers
Names of trainees are in bold.
Submitted:
T. Sultana and S. Dumitrescu, A Proportional Fairness-based Joint Channel and
Power Allocation Scheme for Hybrid NOMA-OMA Downlink Systems, submitted to IEEE
Trans. Wireless Communications, 30 pages (single-column,
double-spaced).
M. Kafi and S. Dumitrescu, Binary codes tailored
for the selective encryption of JPEG-compressed images, submitted to IEEE
Trans. on Circuits and Systems for Video Technology, 14 pages (double-column,
single-spaced).
S.
Zendehboodi and S. Dumitrescu, On the training-based optimal
distributed scalar quantizer design for binary linear classification, submitted
to IEEE Transactions on Information Theory, 63 pages
(single-column, double-spaced).
Published/Accepted:
60.)
M. Kafi and S. Dumitrescu, Binary Code Optimized
for Partial Encryption, pdf, IEEE Trans. Communications, vol.
68, no. 11, pp. 7201-7217, Nov. 2020,
DOI:
10.1109/TCOMM.2020.3015500.
59.) S. Dumitrescu, D. Elzouki, and J. Chen, Lattice-based robust distributed
source coding for three correlated sources, pdf, IEEE Trans. Communications, vol. 68, no. 7, pp. 4089-4103, Jul. 2020, DOI: 10.1109/TCOMM.2020.2987565.
58.) H. Wu and S. Dumitrescu, Design of general
entropy-constrained successively refinable
unrestricted polar quantizer, pdf, IEEE Trans. Communications, vol. 68,
no. 6, pp. 3369-3385, Jun. 2020, DOI: 10.1109/TCOMM.2020.2979113.
57.) H. Wu and S. Dumitrescu, Design of Successively Refinable Unrestricted Polar
Quantizer, pdf, IEEE Trans. Communications, vol. 67, no. 5, pp. 3525-3539, May 2019, DOI:
10.1109/TCOMM.2019.2894808.
56.) D. Elzouki, S. Dumitrescu, and J. Chen, Lattice-based Robust Distributed Source Coding, pdf, IEEE Trans. Information Theory, vol.
65, no. 3, pp. 1764-1781, Mar. 2019, DOI: 10.1109/TIT.2018.2878219.
55.) Q. Zheng and S. Dumitrescu,
Optimal Design of A Two-stage Wyner-Ziv Scalar Quantizer with
Forwardly/Reversely Degraded Side Information, pdf, IEEE Trans. Communications, vol. 67,
no. 2, pp. 1437-1451, Feb. 2019, DOI:
10.1109/TCOMM.2018.2875486.
54.) H. Wu and S. Dumitrescu, Design of Optimal Scalar Quantizer for
Sequential Coding of Correlated Sources, pdf, IEEE
Trans. Communications, vol. 67, no. 1, pp. 693-704, Jan. 2019,
DOI: 10.1109/TCOMM.2018.2869864.
53.) S. Dumitrescu, Y. Chen, and J. Chen, Index Mapping for
Bit-error Resilient Multiple Description Lattice Vector Quantizer, pdf, IEEE Trans. Communications, vol.
66, no. 8, pp. 3638-3652, Aug. 2018,
DOI: 10.1109/TCOMM.2018.2816070.
52.) H. Wu and S. Dumitrescu, Design of Optimal Fixed-rate Unrestricted
Polar Quantizer for Bivariate Circularly Symmetric Sources, pdf IEEE Signal Processing Letters, vol.
25, no. 5, pp. 715-719, May 2018, DOI: 10.1109/LSP.2018.2820642.
51.) H. Wu and S. Dumitrescu, Design of Optimal Entropy-constrained
Unrestricted Polar Quantizer for Bivariate Circularly Symmetric Sources, pdf, IEEE Trans. Communications, vol. 66,
no.5, pp. 2169-2180, May 2018,
DOI: 10.1109/TCOMM.2017.2789221.
50.) H. Wu, T.
Zheng, and S. Dumitrescu, On the Design of Symmetric Entropy-constrained
Multiple Description Scalar Quantizer with Linear Joint Decoders, pdf, IEEE Trans. Communications, vol. 65,
no. 8, pp. 3453-3466, Aug. 2017.
DOI: 10.1109/TCOMM.2017.2704585.
49.) K. Lin and S. Dumitrescu, Cross-layer Resource Allocation for Scalable Video over
OFDMA Wireless Networks: Trade-off between Quality Fairness and Efficiency, pdf, IEEE Trans. Multimedia,
vol. 19, no. 7, pp. 1654-1669, July 2017,
DOI: 10.1109/TMM.2017.2678198.
48.) S. Dumitrescu, On the Design of Optimal Noisy
Channel Scalar Quantizer with Random Index Assignment, pdf, IEEE Trans. Information Theory, vol.
62, no. 2, pp. 724-735, Feb. 2016, DOI :10.1109/TIT.2015.2510658.
47.) S. Dumitrescu and Y. Wan, Bit-error Resilient Index
Assignment for Multiple Description Scalar Quantizers, pdf, IEEE Trans. Information Theory,
vol. 61, no. 5, pp. 2748-2763, May 2015.
46.) Q. Shi, L. Song, C. Tian, J. Chen, and S.
Dumitrescu, Polar Codes for Multiple Descriptions, pdf, IEEE Trans. Information Theory,
vol. 61, no. 1, pp. 107-119, Jan. 2015.
45.) S. Dumitrescu, G. Steiner, and R. Zhang, Optimal
Delivery Time Quotation in Supply Chains to Minimize Tardiness and Delivery
Costs, pdf, Journal
of Scheduling, vol. 18, no. 1, pp. 3-13, Jan. 2015.
44.) Z. Gao and S. Dumitrescu, Flexible Symmetric Multiple
Description Lattice Vector Quantizer with L ≥ 3 Descriptions, pdf, IEEE
Trans. Communications, vol. 62, no. 12, pp. 4281-4292, Dec. 2014.
43.) S. Dumitrescu, T. Zheng,
Asymptotical Analysis of Several Multiple Description Scenarios with L>=3 Descriptions, pdf, IEEE Trans. Communications, vol. 62,
no. 4, pp. 1358-1372, Apr. 2014.
42.) S. Chuah, S. Dumitrescu, X. Wu, l2 Optimized Predictive Image
Coding with l∞ Bound,pdf,
IEEE
Trans. Image Processing, vol.
22, no. 12, pp. 5271-5281, Dec. 2013.
41.) D. Xia, J.-K. Zhang, S. Dumitrescu,
Energy-Efficient Full Diversity Collaborative Unitary Space-Time Block Code
Design via Unique Factorization of Signals, IEEE Trans. Information Theory,
vol. 59, no. 3, pp. 1678-1703, Mar. 2013.
40.) Y. Zhang, S. Dumitrescu, J. Chen, Z. Sun, LDGM-based Multiple Description Coding for Finite Alphabet Sources, pdf, IEEE Trans. Communications, vol. 60, no. 12, pp. 3671-3682, Dec. 2012.
39.) D. Xia, J.-K. Zhang, S. Dumitrescu, F.-K. Gong Full Diversity Non-Coherent Alamouti-Based Toeplitz Space-Time Block Codes, IEEE Trans. Signal Processing, vol. 60, no. 10, pp. 5241-5253, Oct. 2012.
38.) S. Dumitrescu, J. Xu, Efficient Rate-Distortion Optimal Packetization of Embedded Bitstreams into Independent Source Packets, pdf, IEEE Trans. Image Processing, vol. 21, no. 5, pp. 2653-2666, May 2012.
37.) J. Chen, Y. Zhang, S. Dumitrescu, Gaussian
Multiple Description Coding with Low-Density Generator Matrix Codes, pdf, IEEE Trans. Communications,
vol. 60, no. 3, pp. 676-687, Mar. 2012.
36.) S. Dumitrescu, Fast Encoder Optimization in Multi-resolution Scalar
Quantizer Design, pdf, IEEE
Trans. Information Theory, vol. 57, no. 3, pp. 1520-1529, Mar. 2011.
35.) M. Shao, S. Dumitrescu, X. Wu, Layered
Multicast with Inter-layer Network Coding for Multimedia Streaming, pdf, IEEE Trans. Multimedia, vol.
13, no. 2, pp. 353-365, Apr. 2011.
34.) M.
Omoomi, S. Samavi, S.
Dumitrescu, An efficient high payload +/-1 data
embedding scheme, Multimedia Tools and Applications, vol. 54, no. 2, pp. 201-218, Aug. 2011.
33.) J. Chen, S. Dumitrescu, Y. Zhang, J. Wang, Robust Multiresolution Coding, pdf, IEEE Trans. Communications, vol. 58, no. 11, pp. 3186-3195, Nov. 2010.
32.) M. Mahdavi, S. Samavi, S. Dumitrescu, F. Aalamifar, P. Abedikhoozani, Real-time steganalysis of LSB-replacement in digital audio streams, Journal of Circuits, Systems, and Computers, vol. 19, no. 7, pp. 1399-1421, Nov. 2010.
31.) S.
Dumitrescu, G. Rivers, S. Shirani, Unequal Erasure Protection Technique for Scalable
Multi-streams, pdf, IEEE Trans. Image Processing,
vol. 19,
no. 2, pp. 422-434, Feb. 2010.
30.) S. Dumitrescu, Fast Joint Source-Channel Decoding of Convolutional
Coded Markov Sequences with Monge Property, pdf,
IEEE
Trans. Communications, vol. 58, no. 1, pp. 128-135, Jan. 2010.
29.) S. Dumitrescu, X.
Wu, On Properties of Locally Optimal Multiple Description Scalar Quantizers
with Convex Cells, pdf, IEEE
Trans. Information Theory, vol. 55, no. 12, pp. 5591-5606, Dec. 2009.
28.) X. Wang, X. Wu, S.
Dumitrescu, On Explicit Formulas for Bandwidth and Anti-bandwith of Hypercubes,
pdf, Discrete Applied Mathematics,
vol. 157, no. 8, pp. 1947-1952, April 2009.
27.) S. Dumitrescu, Comments on Optimal Erasure Protection for Scalably
Compressed Video Streams with Limited Retransmission, IEEE Trans. Image Processing,
vol. 18, no. 1, pp. 214-216, Jan. 2009.
26.) S. Dumitrescu and X. Wu, On the Complexity of Joint Source-Channel
Decoding of Markov Sequences over Memoryless Channels, pdf, IEEE Trans. Communications, vol. 56,
no. 6, pp. 877-885, June 2008.
25.) S. Dumitrescu and X. Wu, Lagrangian Optimization of Two-description
Scalar Quantizers, pdf, IEEE
Trans. Information Theory, vol. 53, no. 11, pp. 3990-4012, Nov. 2007.
24.) S. Dumitrescu, X. Wu, Z. Wang, Efficient Algorithms for Optimal Uneven
Protection of Single and Multiple Scalable Code Streams against Packet
Erasures, pdf, IEEE Trans. Multimedia,
vol. 9, no. 7, pp. 1466-1474, Nov. 2007.
23.) S.
Dumitrescu, Faster Algorithm for Designing Optimal Prefix-Free Codes with
Unequal Letter Costs, Fundamenta Informaticae, Special Issue "Trajectories of Language
Research", vol. 73, no 1-2, pp. 107-117, Sept. 2006.
22.) X. Wu, S. Dumitrescu, and N. Zhang, On multirate optimality of JPEG
2000 code stream, IEEE Trans. Image Processing, vol. 14(12), pp. 2012-2023, Dec. 2005.
21.) S. Dumitrescu and X. Wu, A new framework of LSB steganalysis of
digital media, IEEE Trans. Signal Processing, Supplement on Secure Media, vol.
53(10), pp. 3936-3947, Oct. 2005.
20.) X. Wu, S. Dumitrescu, P. Biyani, Q. Wu, Fast Chromosome Karyotyping by
Auction Algorithm, Int. J. of Bioinformatics Research and Applications, vol. 1,
no. 3, pp. 351-362, 2005.
19.) S. Dumitrescu and X. Wu, Optimal two-description scalar quantizer
design, pdf, Algorithmica, vol. 41,
no. 4, pp. 269-287, Feb. 2005.
18.) S. Dumitrescu, X. Wu, Z. Wang , Globally optimal uneven
error-protected packetization of scalable code streams, pdf, IEEE Trans. Multimedia, Special Issue on
Streaming Media, vol. 6 (2), pp. 230-239, April 2004.
17.) X. Wu, S. Dumitrescu, Z. Wang, Monotonicity-based fast algorithms for
MAP estimation of Markov sequences over noisy channels, IEEE Trans. Information Theory,
Special Issue on Problems on Sequences: Information Theory & Computer
Science Interface, vol. 50, no.7, pp. 1539-1544, July 2004.
16.) S. Dumitrescu, X. Wu, Algorithms for Optimal Multi-resolution
Quantization, pdf, Journal
of Algorithms, vol. 50, pp. 1-22, Jan. 2004.
15.) S. Dumitrescu, X. Wu, Z. Wang , Detection of LSB Steganography via
Sample Pair Analysis, pdf, IEEE
Trans. Signal Processing, vol. 51, Issue 7, pp. 1995-2007, July 2003.
14.) S.
Dumitrescu, Gh. Păun,
A. Salomaa, Pattern languages versus parallel
communicating grammar systems, Int. J. of Foundations of Computer Science,
8, 1 (1997), 67-80.
13.) S.
Dumitrescu, Gh. Păun,
On the power of parallel communicating grammar systems with right-linear components,
RAIRO
Informatique
Theoretique Applications, 31, 4 (1997),
331-354.
12.) S. Dumitrescu, Gh. Păun,
A. Salomaa, Languages associated to finite and infinite sets of patterns, Revue Roumaine de Mathematiques Pure et Appliquees,
9-10 (1997) 331-354.
11.) S.
Dumitrescu, Non-returning parallel communicating grammar systems can be
simulated by returning systems, Theoretical Computer Science, 165(1996), 463-474.
10.) J.
Dassow, Gh. Păun, S. Vicolov, On the
generative capacity of certain classes of cooperating grammar systems, Fundamenta Informaticae,
22, 5 (1995), 217-226.
9.) J. Dassow, Gh. Păun,
S. Vicolov, On the power of CDGS with regular
components, Foundations of Computing and Decisions Sciences, 18, 2 (1993), 83-108.
8.) S. Vicolov, Cooperating distributed grammar systems with
registers: the regular case, Computers and Artificial Intelligence,
1, 12 (1993), 89-98.
7.) S. Vicolov, Infinite hierachies of
valence languages, Bulletin of the European Association for Theoretical Computer Science,
49 (1993), 192-194.
6.) Gh. Păun, A. Salomaa, S. Vicolov, On the
generative capacity of parallel communicating grammar systems, Int.
J. of Computer Mathematics, 46 (1992),
137-147.
5.) Gh. Paun, M. Szijarto,
S. Vicolov, Further remarks on reduced languages, Fundamenta Informaticae,
16 (1992), 337-347.
4.) S. Vicolov, Non-centralized parallel grammar systems, Studii si Cercetari Matematice (in
Romanian), 44 (1992), 455-462.
3.) Gh. Păun, S. Vicolov, Language representation starting from fully
initial languages, Acta Cybernetica, 10, 1-2 (1991), 65-70.
2.) S. Vicolov, A note on fully initial grammars, Acta Cybernetica, 10, 1-2 (1991), 113-118.
1.)
S. Vicolov, Two
theorems about Marcus contextual languages, Bull. Math. Soc. Sci. Math. Roumanie, 35 (83), 1-2 (1991), 167-170.
Refereed Conference
Papers
49.) S. Dumitrescu and S.
Zendehboodi, Globally Optimal Design of a Distributed Scalar quantizer for
Linear Classification, Proc. IEEE International Symposium on
Information Theory, Melbourne, Australia, July 12-20, 2021, DOI: 10.1109/ISIT45174.2021.9518076.
48.) D. Elzouki, S. Dumitrescu,
and J. Chen, Lattice-based Robust Distributed Source Coding for
Three Correlated Sources, Proc.
16th Canadian Workshop on
Information Theory, Hamilton, Canada, June 2-5, 2019.
47.) M. Kafi and
S. Dumitrescu, Index Assignment Optimized for Partial Encryption, Proc.
16th Canadian Workshop on
Information Theory, Hamilton, Canada, June 2-5, 2019.
46.) Q. Zheng and S. Dumitrescu,
Optimal Design of A Two-stage Wyner-Ziv Scalar Quantizer with Degraded Side
Information, 29th
Biennial Symposium on Communications (BSC 2018),
Toronto, Ontario, Canada, June 6-8, 2018.
45.) H. Wu and S. Dumitrescu,
Design of Optimal Entropy-constrained Successively Refinable Unrestricted Polar
Quantizer for Bivariate Circularly Symmetric Sources, 29th
Biennial Symposium on Communications (BSC 2018), Toronto, Ontario,
Canada, June 6-8, 2018.
44.) H. Wu and S. Dumitrescu, Design
of Optimal Entropy-constrained Unrestricted Polar Quantizer for Bivariate
Circularly Symmetric Sources, IEEE ICASSP, Calgary, Canada, April
2018.
43.) H. Wu and S. Dumitrescu,
Design of Optimal Entropy-constrained Scalar Quantizer for Sequential Coding of
Correlated Sources, IEEE Information Theory Workshop, Kaohsiung, Taiwan, Nov. 2017,
pp. 524-528.
42.)
S. Dumitrescu, Y. Chen, and J. Chen Index Mapping for Bit-error
Resilient Multiple Description Lattice Vector Quantizer, IEEE Intern.
Symposium Inform. Theory, Aachen, Germany, June 2017.
41.)
H. Wu and S. Dumitrescu, Novel UEP Product Code Scheme with
Protograph-based Linear Permutation and Iterative Decoding for Scalable Image
Transmission, Intern. Workshop on Multimedia Signal Processing (MMSP),
Montreal, Canada, Sept. 2016.
40.) Q. Shi, L. Song, C. Tian, J. Chen and S.
Dumitrescu, Polar Codes for Multiple Descriptions, IEEE Intern.
Symposium Inform. Theory, Honolulu, HI, June-July 2014.
39.)
Z. Gao and S. Dumitrescu, Flexible Multiple Description Lattice Vector Quantizer
with L ≥ 3 Descriptions, IEEE
Data Compression Conf., Snowbird, UT, Mar. 2014.
38.) S. Dumitrescu, Y. Wan, Bit-error Resilient Index
Assignment for Multiple Description Scalar Quantizers, IEEE Intern. Symposium Inform.
Theory, Istanbul, Turkey, July 2013.
37.) Y. Wan and S. Dumitrescu, Index Assignment Capable of Detecting
One Bit Errors for Multiple Description Scalar Quantizers, Canadian Workshop on Inform.
Theory, Toronto, June 2013.
36.) S. Chuah, S. Dumitrescu,
and X. Wu, L2 optimized predictive image coding with L∞ bound,
ICASSP,
Vancouver, Canada, May 2013.
35.) Y. Zhang, J. Wang, and S.
Dumitrescu, Efficient Motion Estimation Scheme for Downsizing H.264 Homogeneous
Transcoding, IEEE Intern. Conf. on Signal and Image Proc. Appl., Kuala Lumpur, Malaysia, Nov. 2011.
34.) J. Xu, S. Dumitrescu, Fast
R-D Optimal Packetization of Embedded Bitstreams into Independent Source
Packets, IEEE Data Compression Conf., Mar. 2011,
Snowbird, UT, pp. 283-292.
33.) J. Chen, S. Dumitrescu, Y. Zhang, and J. Wang, Robust Multiresolution Coding with Hamming Distortion Measure, IEEE Intern. Symposium on Inform. Theory, June 2010, Austin, TX.
32.) Y. Zhang, S. Dumitrescu, J. Chen, and
Z. Sun, Multiple Description Coding Based on LDGM Codes, Proc. IEEE Information Theory Workshop, Taormina, Italy, Oct. 2009,
pp. 85-89.
31.) M. Shao, S. Dumitrescu, and X. Wu,
Rate-distortion Optimized Network Communication Using General MDC, Proc. of
IEEE Information Theory Workshop on Networking and Information
Theory, June 2009, Volos, Greece, pp.176-180.
30.) S. Dumitrescu, M. Shao, X. Wu, Layered Multicast with
Inter-layer Network Coding, Proc. of IEEE INFOCOM 2009, April
2009, Rio de Janeiro, Brazil, pp.442-449.
29.) G. Rivers, S. Dumitrescu, S. Shirani, Novel R-D Optimized Uneven Erasure-Protection
Strategy for Scalable Data Formed of Multiple Code Streams, Proc.
of IEEE Int. Workshop on Multimedia Signal Processing, Oct. 2008,
Queensland, Australia, pp. 418-423.
28.) M. Shao, S. Dumitrescu, X. Wu, Toward the Optimal Multirate Multicast for Lossy Packet Network, ACM Multimedia Conf., Oct. 2008, Vancouver, Canada.
27.) S.
Dumitrescu, Speed-up of Encoder Optimization Step in Multiple Description
Scalar Quantizer Design, Proc. IEEE Data
Compression Conference, pp. 382-391, March
2008, Snowbird, UT.
26.) S. Dumitrescu and T. Zheng, Improved Multiple Description Framework Based on Successively Refinable Quantization and Uneven Erasure Protection, Proc. of IEEE Data Compression Conference, pp. 514-514, March 2008, Snowbird, UT.
25.) S. Dumitrescu, Fast Joint Source-Channel Decoding of Convolutional
Coded Markov Sequences with Monge Property, Proc. of IEEE Information Theory
Workshop, Sept. 2007, Lake Tahoe.
24.) X. Wang, X. Wu and S.
Dumitrescu, On Optimal Index Assignment for MAP Decoding of Markov Sequences, Proc.
of the 2006 IEEE Int. Symposium on Information Theory, July 2006.
23.) S. Dumitrescu, X. Wu and Z. Wang, Efficient Algorithm for Globally
optimal Uneven Erasure-protected Packetization of Scalable Code Streams, Proc.
of the 2006 IEEE Int. Conf. on Multimedia and
Expo, July 2006.
22.) M. Roeder, X. Wu and S. Dumitrescu, Error Resilient
Multiple Description Compression of Vector Graphics, Proc. of the 2006 IEEE Int. Conf. on Multimedia and
Expo, July 2006.
21.) S.
Dumitrescu, Faster Algorithm for Designing Optimal Prefix-Free Codes with
Unequal Letter Costs, Proc. of the 2006
IEEE Data Compression Conference, pp. 444,
March 2006.
20.) S. Dumitrescu, X. Wu, On the Complexity of Joint Source-Channel
Decoding of Markov Sequences over Memoryless Channels, Proc. of Int.
Symp. on Information Theory 2005, pp. 1666-1670, Sept. 2005.
19.) S. Dumitrescu, X. Wu, LSB Steganalysis Based on High-order Statistics,
Proc.
of ACM Multimedia Security Workshop 2005, pp. 25-32, August 2005.
18.) S. Dumitrescu, X. Wu, Globally Optimal Uneven Erasure-Protected Multi-Group
Packetization of Scalable Codes, Proc. of Int. Conf. Multimedia and
Expo2005, pp. 900-903, July 2005.
17.) S. Dumitrescu, X. Wu, On Multiple Description Scalar Quantizers with
Convex Codecells, Proc. of Canadian Workshop on Information Theory 2005,
pp. 215-218, June 2005.
16.) S. Dumitrescu and X. Wu, On Global Optimality of Gradient Descent
Algorithms for Fixed-Rate Scalar Multiple Description Quantizer Design, Proc
IEEE Data Compression Conference, pp. 388-397, March 2005.
15.) X. Wu, P. Biyani, S. Dumitrescu, and Q. Wu, Globally Optimal
Classification and Pairing of Human Chromosomes, Proc. 26th Annual Int. Conf. of
IEEE Engineering in Medicine and Biology Society, Sept. 2004.
14.) S. Dumitrescu and X. Wu, Lagrangian Global Optimization of
Two-description Scalar Quantizers, Proc. IEEE Int. Symposium on Information
Theory, pp. 300, June 2004.
13.) S. Dumitrescu, X. Wu, and G.
Bahl, Fast algorithms for optimal two-description scalar quantizer design, Proc.
IEEE Data Compression Conf., pp. 42-51, March 2004.
12.) Z. Wang, X. Wu, S. Dumitrescu, Fast length-constrained MAP decoding of
variable length coded Markov sequences over noisy channels, Proc.
IEEE
Int. Conf. on Communications, June 2004.
11.) Z. Wang, X. Wu, S. Dumitrescu, Length-Constrained MAP Decoding
Revisited, Proc. IEEE Int. Conf. on Multimedia and
Expo, June 2004.
10.) S. Dumitrescu, X. Wu, On Optimality of JPEG 2000 Code Stream, Proc.
IEEE Int. Conf. on Image Processing, vol. 3, pp. III_773-III_776, Sept.
2003.
9.) S. Dumitrescu, X.Wu, Optimal variable rate multiplexing of scalable
code streams, Proc. IEEE Data Compression Conf., pp. 424-424, March 2003.
8.) S. Dumitrescu, X. Wu, Optimal multiresolution quantization for scalable
multimedia coding, Proc. IEEE Information Theory Workshop, pp. 139-142, Oct. 2002.
7.) S. Dumitrescu, X. Wu, Z. Wang , Detection of LSB Steganography via
Sample Pair Analysis, Proc. 5-th Int. Workshop on Information
Hiding, pp. 355-372, Oct. 2002.
6.) S. Dumitrescu, X. Wu, N. Memon, On steganalysis of random LSB embedding
in continuous-tone images, Proc. IEEE Int. Conf.on Image Processing,
vol. 3, pp. 641-644, Sept. 2002.
5.) S. Dumitrescu, X. Wu, Steganalysis of LSB embedding in multimedia
signals, Proc. IEEE Int. Con. on Multimedia and Expo, vol. 1, pp.
581-584, August 2002.
4.)
S. Dumitrescu, X. Wu,
On embedded scalable code stream of minimum expected distortion for variable
rate channels, Proc. IEEE Int. Symposium on Information Theory, pp. 347-347,
July 2002.
3.)
Wu, S. Dumitrescu, On
optimal multi-resolution scalar quantization, Proc. IEEE Data Compression Conf.,
pp. 322-331, April 2002.
2.)
S. Dumitrescu, X. Wu,
Z. Wang , Globally optimal uneven error-protected packetization of scalable
code streams, Proc. IEEE Data Compression Conf., pp. 73-82, April 2002.
1)
S. Vicolov,
Hierachies of Valence Languages, Proc.
7th Intern. Meeting Young Comp. Scientists, pp. 191-196, Nov. 1992.
Invited Papers
Y. Zhang, S. Dumitrescu, J. Chen, Z. Sun, LDGM-based
Codes for Successive Refinement, 47th Annual Allerton Conf. on
Communications, Control and Computing, Monticello, IL, Oct. 2009.
S. Dumitrescu, J. Chen, Y. Zhang,
Multiple Description Coding for Binary Sources, International Conf. on Wireless Communications & Signal
Processing (WCSP2009), Nanjing, China, Nov. 2009.
Articles in books
S.
Dumitrescu, Characterization of recursively enumerable languages using CD
grammar systems with two registers and right-linear rules, in vol. New
Trends in Formal Languages, (Gh. Păun, A. Salomaa, eds.), Lecture
Notes of Computer Science 1218, Springer-Verlag, Berlin, 1997,
167--177.
S Vicolov-Dumitrescu, On total parallelism in contextual
grammars, in vol. Mathematical Linguistics and Related Topics, (Gh. Păun, ed.), Editura Academică,
Bucharest, 1995, 350--360.
S. Vicolov-Dumitrescu, Grammars, grammar systems and gsm
mappings with valences, in vol. Mathematical Aspects of Natural and Formal
Languages, (Gh. Păun,
ed.) World Sci. Publ., Singapore, 1994, 473--491.