In this paper we propose `Giga internet-based 3DTV trial service' technique and show test results in KOREA. This service supports that many service viewers are able to simultaneously watch the 3D-based educational...
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In this paper we propose `Giga internet-based 3DTV trial service' technique and show test results in KOREA. This service supports that many service viewers are able to simultaneously watch the 3D-based educational broadcasting by using overlay multicast-based real-time 3D media delivery platform.
Rightful ownership of images is indispensible. Watermarking provide such claims. In this paper, we embed our watermarks in the two subbands (HL and LH) of the DWT of the image. Simulation results demonstrate the prese...
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Rightful ownership of images is indispensible. Watermarking provide such claims. In this paper, we embed our watermarks in the two subbands (HL and LH) of the DWT of the image. Simulation results demonstrate the presence of watermark against very high compression JPEG as well as against several attacks such as Gaussian-noise, resizing, and low pass filtering.
A Global Reduced Reference Image Quality Metric (IQM) based on feature fusion using neural networks is proposed. The main idea is the introduction of a Reduced Reference degradation-dependent IQM (RRIQM/D) across a se...
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A Global Reduced Reference Image Quality Metric (IQM) based on feature fusion using neural networks is proposed. The main idea is the introduction of a Reduced Reference degradation-dependent IQM (RRIQM/D) across a set of common distortions. The first stage consists of extracting a set of features from the wavelet-based edge map. Such features are then used to identify the type of degradation using Linear Discriminant Analysis (LDA). The second stage consists of fusing the extracted features into a single measure using Artificial Neural Networks (ANN). The result is a degradation- dependent IQM measure called the RRIQM/D. The performance of the proposed method is evaluated using the TID 2008 database and compared to some existing IQMs. The experimental results obtained using the proposed method demonstrate an improved performance even when compared to some Full Reference IQMs.
The problem of classification of continuous general data for content based retrieval and describe the scheme that able to classify the audio segments based on the MPEG-7 audio descriptors and description schemes that ...
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The problem of classification of continuous general data for content based retrieval and describe the scheme that able to classify the audio segments based on the MPEG-7 audio descriptors and description schemes that consist of tools for indexing audio media using probabilistic sound models. The descriptors provide containers for category labels as well as data structures for quantitative information about sound content. We describe the normative tools as well as informative methods for automatic description extraction.
A method for identifying JPEG 2000 images with different coding parameters, such as DWT-filters, code-block sizes, quantization step sizes, and resolution levels, is presented. The proposed method does not produce fal...
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ISBN:
(纸本)9781457705380
A method for identifying JPEG 2000 images with different coding parameters, such as DWT-filters, code-block sizes, quantization step sizes, and resolution levels, is presented. The proposed method does not produce false-negative matches regardless of the different coding parameters. Moreover, the proposed method is fast because it uses the number of zero-bit-planes. This number can be extracted from the JPEG 2000 codestream by only parsing the header information. Experimental results showed the effectiveness of the proposed method for digital cinema applications.
This paper presents a novel rank aggregation approach based on contextual information aiming to improve the effectiveness of Content-Based Image Retrieval (CBIR) tasks. In our approach, information encoded in both dis...
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This paper presents a novel rank aggregation approach based on contextual information aiming to improve the effectiveness of Content-Based Image Retrieval (CBIR) tasks. In our approach, information encoded in both distances among images and ranked lists computed by CBIR systems are used for analyzing contextual information and then re-rank collection images. We conducted several experiments involving shape, color, and texture descriptors. We also evaluated our method in comparison to other rank aggregation approaches. Experimental results demonstrate the effectiveness of our method.
A 3D-DWT video watermarking technique is proposed in this article. The algorithm is implemented on the basis of human vision system (HVS). To improve the robustness of watermark against JPEG compression, the most rece...
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A 3D-DWT video watermarking technique is proposed in this article. The algorithm is implemented on the basis of human vision system (HVS). To improve the robustness of watermark against JPEG compression, the most recently proposed techniques embed watermark in to the low-frequency components of the video frames. However, these components hold significant information of the video. Directly replacing the low-frequency components with watermark may introduce undesirable degradation to video quality. Simulation results demonstrate that the embedded watermarks can be almost fully extracted from the JPEG-compressed frames with very high compression ratio. Furthermore, the algorithm is robust against uniform noise attack, frame dropping and frame swapping.
IPTV, which is based on the universal IP infrastructure, has the inherent nature of heterogeneity in terms of contents, networks, terminals, and users. An important solution to cope with such heterogeneity is content ...
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IPTV, which is based on the universal IP infrastructure, has the inherent nature of heterogeneity in terms of contents, networks, terminals, and users. An important solution to cope with such heterogeneity is content adaptation. This paper reviews the standardization issues related to content adaptation in IPTV standards. We first describe the basic architecture of content adaptation and its integration into the ITU-T IPTV architecture. Then typical methods of content adaptation in practical IPTV systems are discussed in detail. Especially, we highlight the standard metadata tools that are potential to support adaptation methods within ITU-T IPTV architecture. Some recent developments in other standard bodies are also discussed.
Dynamically reconfigurable hardware is a promising technology that combines in the same device both the high performance and the flexibility that many recent applications demand. However, one of its main drawbacks is ...
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Dynamically reconfigurable hardware is a promising technology that combines in the same device both the high performance and the flexibility that many recent applications demand. However, one of its main drawbacks is the reconfiguration overhead, which involves important delays in the task execution, usually in the order of hundreds of milliseconds, as well as high energy consumption. One of the most powerful ways to tackle this problem is configuration reuse, since reusing a task does not involve any reconfiguration overhead. In this paper we propose a configuration replacement policy for reconfigurable systems that maximizes task reuse in highly dynamic environments. We have integrated this policy in an external task-graph execution manager that applies task prefetch by loading and executing the tasks as soon as possible (ASAP). However, we have also modified this ASAP technique in order to make the replacements more flexible, by taking into account the mobility of the tasks and delaying some of the reconfigurations. In addition, this replacement policy is a hybrid design-time/run-time approach, which performs the bulk of the computations at design time in order to save run-time computations. Our results illustrate that the proposed strategy outperforms other state-of- the-art replacement policies in terms of reuse rates and achieves near-optimal reconfiguration overhead reductions. In addition, by performing the bulk of the computations at design time, we reduce the execution time of the replacement technique by 10 times with respect to an equivalent purely run-time one.
This paper presents some power results of Joint Photographic Experts Group (JPEG) in Field-Programmable Gate Array (FPGA) and provides some analysis and results in reduced dynamics-power methods of it. The dynamic pow...
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This paper presents some power results of Joint Photographic Experts Group (JPEG) in Field-Programmable Gate Array (FPGA) and provides some analysis and results in reduced dynamics-power methods of it. The dynamic power consumed by a digital CMOS circuit is directly proportional to both switching activity and payload capacitance. We use Xilinx XPower Analyzer to analyze the impact of different switching frequency of JPEG in FPGA and optimization results. Experimental results show that the dynamic power is linear with switching frequency and reduces with glitching reducing techniques.
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