Results 1 - 10 of 32

Power-rate-distortion model for low-complexity video coding

by Li-wei Kang, Chun-shien Lu - in Proc. of Picture Coding Symposium , 2009
"... Wireless visual sensor networks are potentially applicable for several emerging applications. Since the resource-limited restriction for a visual sensor node (VSN), efficient resource allocation for video compression is challenging. In this paper, a power-rate-distortion (PRD) model-based low-comple ..."
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Wireless visual sensor networks are potentially applicable for several emerging applications. Since the resource-limited restriction for a visual sensor node (VSN), efficient resource allocation for video compression is challenging. In this paper, a power-rate-distortion (PRD) model-based low-complexity

Power-Rate-Distortion Optimized Resource-Scalable Low-Complexity Video Coding in Wireless Multimedia Sensor Networks

by Li-wei Kang, Chun-shien Lu
"... 1 Abstract—Wireless multimedia sensor networks (WMSNs) have been potentially applicable for several emerging applications. However, the available resources, i.e., power and rate, of visual sensors in a WMSN are very limited. Hence, it is important but challenging to achieve efficient resource alloca ..."
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theoretical guideline for performance optimization under limited resource constraints. Both the analytic and simulation results have shown the applicability of our video coding scheme for WMSNs. Index Terms—Low-complexity video coding, multiview video coding, resource-scalable video coding, power-rate-distortion

On the accuracy and complexity of rate-distortion models for fine-grained scalable video sequences

by Cheng-hsin Hsu, Mohamed Hefeeda , 2006
"... Rate-distortion (R-D) models are functions that describe the relationship between the bitrate and expected level of distortion in the reconstructed video stream. R-D models enable optimization of the received video quality in different network conditions. Several R-D models have been proposed for, t ..."
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Rate-distortion (R-D) models are functions that describe the relationship between the bitrate and expected level of distortion in the reconstructed video stream. R-D models enable optimization of the received video quality in different network conditions. Several R-D models have been proposed for

Motion vector field manipulation for complexity reduction in scalable video coding

by Meng-ping Kao, Truong Nguyen - in 40th Asilomar Conf. Signals Syst. Comput , 2006
"... We propose a motion vector field (MVF) scaling algorithm which includes both up-sampling and down-sampling operations. Through this model, it is possible to obtain all the MVF information required for different spatial resolutions in scalable video coding (SVC) efficiently from a pre-specified spati ..."
Abstract - Cited by 4 (4 self) - Add to MetaCart
tasks in a generic video codec. In video broadcasting application, the proposed algorithm could provide even better coding efficiency than conventional methods in the rate distortion sense. 1 1.

Rate-Distortion Models for FGS-encoded Video Sequences

by Cheng-hsin Hsu
"... Abstract — Fine granularity scalability (FGS) coding enables finer bitrate scalability and better error resiliency than traditional multi-layer coding, because it allows truncating a bitstream at arbitrary bits. This flexibility enables streaming applications a more space to optimize quality (i.e., ..."
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.e., minimize distortion) at a given channel bandwidth. This optimization relies on accurate estimation of the rate-distortion (R-D) characteristics of video sequences. In this paper, we analyze and compare the performance of the R-D models proposed in the literature for FGS coding systems. We analyze

1 On the Accuracy and Complexity of Rate-Distortion Models for Fine-Grained Scalable Video Sequences

by Chenghsin Hsu, Mohamed Hefeeda
"... Rate-distortion (R-D) models are functions that describe the relationship between the bitrate and expected level of distortion in the reconstructed video stream. R-D models enable optimization of the received video quality in different network conditions. Several R-D models have been proposed for, t ..."
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Rate-distortion (R-D) models are functions that describe the relationship between the bitrate and expected level of distortion in the reconstructed video stream. R-D models enable optimization of the received video quality in different network conditions. Several R-D models have been proposed for

Scalable rate control for MPEG4 video

by Hung-ju Lee, Tihao Chiang, Senior Member, Ya-qin Zhang - Circuits and Systems for Video Tech , 2000
"... Abstract—This paper presents a scalable rate control (SRC) scheme based on a more accurate second-order rate-distortion model. A sliding-window method for data selection is used to mitigate the impact of a scene change. The data points for updating a model are adaptively selected such that the stati ..."
Abstract - Cited by 58 (1 self) - Add to MetaCart
Abstract—This paper presents a scalable rate control (SRC) scheme based on a more accurate second-order rate-distortion model. A sliding-window method for data selection is used to mitigate the impact of a scene change. The data points for updating a model are adaptively selected

Scalable complexity-distortion model for fast motion estimation

by Xiaoquan Yi, Nam Ling - Proc. of SPIE Visual Communications and Image Processing (VCIP
"... Recently established international video coding standard H.264/AVC and the upcoming standard on scalable video coding (SVC) bring part of the solution to high compression ratio requirement and heterogeneity requirement. However, these algorithms have unbearable complexities for real-time encoding. T ..."
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adjust its complexity while providing best possible services. Keywords: Complexity-distortion optimal model, motion estimation, block matching algorithm, BMA, dynamic threshold, complexity quantization parameter, scalable video coding

Analysis and Design of Power Constrained Video Encoder

by Yongfang Liang, Zhihai Hez, Ishfaq Ahmadl - in IEEE 6th CAS Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication (MWC'04 , 2004
"... Abstract-In wireless communication networks, an important issue that must be addressed is the limited energy supply of a mobile device, especially in wireless vidw applications. In this paper, we develop a parametric video encoding architecture, which is fully scalable in power consumption, and esia ..."
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maximizing the picture quality. The P-R-D model provides a theoretical guideline for system design and performance optimization in wireless video communication under power constraint. Keywords-Energy consumption, complexity scalability, video coding, wireless video Communication. 1.

TP PT FPT RATE-DISTORTION MODELING AND ITS APPLICATION TO QUALITY LAYER ASSIGNMENT IN SVC/H.264 FINE-GRANULAR SNR SCALABLE VIDEOSTPF

by Jun Sunp P, Wen Gaop P, Debin Zhao
"... To support efficient quality extraction in H.264/AVCbased scalable video coding, it’s important to obtain the rate-distortion (R-D) or distortion-rate (D-R) function of each FGS packet. In this paper, firstly, we analyze the sub-bitplane technology of SVC FGS coding, and conclude the MSE-based D-R f ..."
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To support efficient quality extraction in H.264/AVCbased scalable video coding, it’s important to obtain the rate-distortion (R-D) or distortion-rate (D-R) function of each FGS packet. In this paper, firstly, we analyze the sub-bitplane technology of SVC FGS coding, and conclude the MSE-based D
Results 1 - 10 of 32