Search results for: Cheolhong An

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article

Adaptive Lagrange Multiplier Selection Using Classification-Maximization and Its Application to Chroma QP Offset Decision

Cheolhong An, T Q Nguyen

IEEE Transactions on Circuits and Systems for Video Technology > 2011 > 21 > 6 > 783 - 791

In this paper, we propose bit allocation between luma samples and chroma samples using chroma quantization parameter (QP) offsets for Cb and Cr. For this work, we propose an efficient adaptive Lagrange multiplier selection method using classification-maximization, and then apply the proposed adaptive Lagrange multiplier selection to decide chroma QP offsets for Cb and Cr. To our knowledge, this is...

chapter

Statistical learning based intra prediction in H.264

Cheolhong An, T.Q. Nguyen

2008 15th IEEE International Conference on Image Processing > 2800 - 2803

2008 15th IEEE International Conference on Image Processing - ICIP 2008

In this paper, we improve the performance of intra prediction and simplify mode decision procedure at the same time. For these works, we apply a statistical learning method such as Support Vector Machines for Regression (SVR) to improve the performance of current H.264 intra prediction via batch learning. In addition, we only use single Macro Block type and one intra prediction mode with high prediction...

chapter

Iterative R-D optimization of H.264

Cheolhong An, T.Q. Nguyen

2008 IEEE International Conference on Acoustics, Speech and Signal Processing > 665 - 668

ICASSP 2008. IEEE International Conference on Acoustic, Speech and Signal Processes

In this paper, we apply the primal-dual decomposition and subgradient projection methods to solve the rate-distortion optimization problem with the constant bit rate constraint. The primal decomposition method enables spatial or temporal prediction dependency within a group of picture (GOP) to be processed in the master primal problem. As a result, we can apply the dual decomposition to minimize independently...

article

Resource Allocation for Error Resilient Video Coding Over AWGN Using Optimization Approach

Cheolhong An, T.Q. Nguyen

IEEE Transactions on Image Processing > 2008 > 17 > 12 > 2347 - 2355

The number of slices for error resilient video coding is jointly optimized with 802.11a-like media access control and the physical layers with automatic repeat request and rate compatible punctured convolutional code over additive white gaussian noise channel as well as channel times allocation for time division multiple access. For error resilient video coding, the relation between the number of...

article

Resource Allocation for TDMA Video Commtmmunication Over AWGN Using Cross-Layer Optimization Approach

Cheolhong An, T.Q. Nguyen

IEEE Transactions on Multimedia > 2008 > 10 > 7 > 1406 - 1418

Cross-layer optimization approach is applied to allocate channel times of time-division multiple access (TDMA) to utility functions which send different video streams with different rate-distortion characteristics. Given a channel time, each utility function solves an optimization problem to obtain the optimal source code rate, channel code rate and media access control (MAC) frame size. In this paper,...

article

Iterative Rate-Distortion Optimization of H.264 With Constant Bit Rate Constraint

Cheolhong An, T.Q. Nguyen

IEEE Transactions on Image Processing > 2008 > 17 > 9 > 1605 - 1615

chapter

Cross-Layer Optimization for Video Communication Over AWGN Channel

Cheolhong An, Truong Q. Nguyen

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference > 3348 - 3352

GLOBECOM 2007 - IEEE Global Telecommunications Conference

chapter

Analysis of Utility Functions for Video

Cheolhong An, Truong Q. Nguyen

2007 IEEE International Conference on Image Processing > 5 > V - 89 - V - 92

2007 IEEE International Conference on Image Processing, ICIP 2007

In this paper, we formulate the utility functions of distortion and Peak Signal-to-Noise Ratio (PSNR) which are generally used for the performance evaluation of video coding applications as the utility functions. The convexity property of these utility functions is analyzed in the original domain and transformed domain of an optimization variable. From this analysis, we derive joint optimization scheme...

chapter

Low Complexity Scalable Video Coding

Cheolhong An, T.Q. Nguyen

2006 Fortieth Asilomar Conference on Signals, Systems and Computers > 1086 - 1089

2006 Fortieth Asilomar Conference on Signals, Systems and Computers

In this paper, we consider scalable video coding (SVC) which has higher complexity than H.264/AVC since it has spatial, temporal and quality scalability in addition to H.264/AVC functionality. Furthermore, inter-layer prediction and layered coding for spatial scalability make motion estimation and mode decision more complex. Therefore, we propose low complexity SVC schemes by using current developing...

chapter

Efficient Motion Accuracy Search for Global Motion Vector Coding

G. Dane, Cheolhong An, Truong Nguyen

2006 Fortieth Asilomar Conference on Signals, Systems and Computers > 1072 - 1075

2006 Fortieth Asilomar Conference on Signals, Systems and Computers

One of the drawbacks of using global motion estimation in motion-compensated video coding is the overhead associated with the number and accuracy of motion parameters. Although prediction gain increases with increased motion accuracy, higher accuracy is not affordable since this increases motion bit rate as well. Therefore, an efficient global motion vector coding algorithm is necessary for improving...

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Keywords

VIDEO CODING (7)
H.264 (4)
UTILITY FUNCTION (3)
VIDEO (3)
802.11 (2)
ACCESS PROTOCOLS (2)
AUTOMATIC REPEAT REQUEST (2)
AWGN CHANNELS (2)
BIT ALLOCATION (2)
CONVOLUTIONAL CODES (2)
CROSS-LAYER OPTIMIZATION (2)
ITERATIVE RATE-DISTORTION OPTIMIZATION PROBLEM (2)
LAGRANGE MULTIPLIER (2)
MATHEMATICAL MODEL (2)
MOTION COMPENSATION (2)
OPTIMISATION (2)
OPTIMIZATION (2)
PRIMAL-DUAL DECOMPOSITION (2)
PRIMAL-DUAL DECOMPOSITION METHOD (2)
RATE CONTROL (2)
RATE DISTORTION THEORY (2)
RATE-DISTORTION (2)
RESOURCE ALLOCATION (2)
SUBGRADIENT PROJECTION METHOD (2)
TEMPORAL PREDICTION DEPENDENCY (2)
VIDEO COMPRESSION (2)
802.11-LIKE MAC (1)
ADAPTIVE LAGRANGE MULTIPLIER SELECTION (1)
ADDITIVE WHITE GAUSSIAN NOISE CHANNEL (1)
ARTIFICIAL NEURAL NETWORKS (1)
AWGN (1)
AWGN CHANNEL (1)
BIT ALLOCATION CONDITION (1)
BIT RATE (1)
BIT RATE CONSTRAINT (1)
CHANNEL CODE RATE (1)
CHANNEL CODING (1)
CHROMA QP OFFSET (1)
CHROMA QP OFFSET DECISION (1)
CHROMA QUANTIZATION PARAMETER OFFSETS (1)
CHROMA SAMPLES (1)
CLASSIFICATION-MAXIMIZATION (1)
COMPUTATIONAL COMPLEXITY (1)
CONSTANT BIT RATE CONSTRAINT (1)
CONSTRAINT OPTIMIZATION (1)
CONSTRAINT THEORY (1)
CONVEX OPTIMIZATION (1)
CONVEXITY (1)
CONVOLUTIONAL CODE (1)
COSTS (1)
CROSS-LAYER OPTIMIZATION APPROACH (1)
DATA COMPRESSION (1)
DEFAULT MAPPING FUNCTION (1)
DIFFERENTIAL MOTION VECTORS (1)
DISCRETE COSINE TRANSFORMS (1)
DISTORTION-RATE MODEL (1)
DIVERSE IMBALANCE ORIENTED SELECTION SCHEME (1)
ENCODING (1)
ERROR ANALYSIS (1)
ERROR RESILIENCE (1)
ERROR RESILIENT VIDEO CODING (1)
FILTERING THEORY (1)
FIXED MOTION BIT-RATE (1)
GALLIUM (1)
GLOBAL MOTION VECTOR CODING ALGORITHM (1)
GRADIENT METHODS (1)
GROUP OF PICTURES (1)
H.264 REFERENCE SOFTWARE MODEL (1)
H.264-AVC (1)
H264 (1)
IEEE 802.11 STANDARDS (1)
IMAGE POINT DETECTION (1)
INDEXES (1)
INTER-LAYER MOTION VECTOR PREDICTION (1)
INTER-LAYER PREDICTION CODING (1)
INTEREST STRENGTH ASSIGNMENT SCHEME (1)
INTERPOLATION (1)
INTRA PREDICTION (1)
ITERATIVE METHODS (1)
JOINT OPTIMIZATION (1)
KERNEL (1)
LAGRANGIAN COST (1)
LAGRANGIAN FUNCTIONS (1)
LAYERED CODING (1)
LEARNING (ARTIFICIAL INTELLIGENCE) (1)
LOW COMPLEXITY SCALABLE VIDEO CODING (1)
LUMA SAMPLES (1)
MACRO BLOCK MODE DECISION (1)
MANGANESE (1)
MEAN SQUARE ERROR METHODS (1)
MEAN SQUARE ERROR MODELING (1)
MEDIA ACCESS CONTROL (1)
MEDIA ACCESS CONTROL FRAME SIZE (1)
MEDIA ACCESS PROTOCOL (1)
MOTION ACCURACY SEARCH METHOD (1)
MOTION ESTIMATION (1)
MOTION VECTOR ESTIMATION (1)
MOTION VECTOR INTERPOLATION (1)
MOTION-COMPENSATED TEMPORAL FILTERING (1)
MOTION-COMPENSATED VIDEO CODING (1)
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INFONA - science communication portal

Search results for: Cheolhong An

Adaptive Lagrange Multiplier Selection Using Classification-Maximization and Its Application to Chroma QP Offset Decision

Statistical learning based intra prediction in H.264

Iterative R-D optimization of H.264

Resource Allocation for Error Resilient Video Coding Over AWGN Using Optimization Approach

Resource Allocation for TDMA Video Commtmmunication Over AWGN Using Cross-Layer Optimization Approach

Iterative Rate-Distortion Optimization of H.264 With Constant Bit Rate Constraint

Cross-Layer Optimization for Video Communication Over AWGN Channel

Analysis of Utility Functions for Video

Low Complexity Scalable Video Coding

Efficient Motion Accuracy Search for Global Motion Vector Coding

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