An Optimal Framework of Video Adaptation and Its Application to Rate Adaptation Transcoding

Kim, Jae-Gon; Wang, Yong; Chang, Shih-Fu; Kim, Hyung-Myung

doi:10.4218/etrij.05.0105.0019

Cited by 20 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the variety of video sources, terminals, and networks, several types of conversions are required for video delivery. In order to deliver digital content to diverse terminals over various networks, it is necessary to adaptively transcode the preencoded video into another form to meet specific terminal and network requirements [11].…”

Section: A Mpeg-2 To Mpeg-4 Video Transcodingmentioning

confidence: 99%

Broadcasting and Communication Convergent Network Based on MPEG-21: Design and Implementation of Multimedia Service Framework

Cho

Kim

Hong

2006

ETRI J

Self Cite

View full text Add to dashboard Cite

In this paper, we present a practical implementation of the MPEG‐21 multimedia framework for broadcasting and communication convergent services. MPEG‐21 standard technology was exploited to build a convergent service framework. Using this framework, a service model and several scenarios have been successfully designed and implemented. In addition, interoperability, which is the main objective of a multimedia framework, especially in a convergent environment consisting of heterogeneous networks and various types of devices, has been addressed in detail. The experimental results show that the implemented test bed provides a next‐generation multimedia service; that is, universal multimedia access (UMA), meeting the requirements of a broadcasting and communication convergent environment.

show abstract

Section: A Mpeg-2 To Mpeg-4 Video Transcodingmentioning

confidence: 99%

Broadcasting and Communication Convergent Network Based on MPEG-21: Design and Implementation of Multimedia Service Framework

Cho

Kim

Hong

2006

ETRI J

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the context of utility-based multimedia adaptation, previous work has considered the mapping of points across multi-dimensional spaces [26], whereby points in an adaptation space (representing multimedia adaptation operations) are mapped to resource and utility (quality) spaces. Such mappings are also used in the scope of the MPEG-21 digital item adaptation (DIA) [27] standard to be used for optimizing multimedia content adaptation decisions.…”

Section: Introduction and Related Workmentioning

confidence: 99%

Meta-Modeling QoE

Varela

Skorin‐Kapov

Guyard

et al. 2014

PIK - Praxis Der Informationsverarbeitung Und Kommunikation

View full text Add to dashboard Cite

In this paper we propose a methodological framework for modeling Quality of Experience (QoE) for media services in a generic manner. We consider QoE as a multi-dimensional concept dependent on several factors related to the service itself, its resource requirements, its users, and its context of use. As a first step, we group these factors into four factor spaces and propose a mapping of them into a QoE space. We then focus on the application of this mapping in the context of networked media services by adhering to a layered approach for modeling QoE dimensions in relation to the aforementioned QoE-affecting factors. Such an approach facilitates understanding a service's QoE as acomposite function of the performance of the underlying network, and the actual service implementation, under constraints imposed by some of the QoEaffecting factors. In order to illustrate the applicability of the proposed methodology, we present a case study for mobile video.

show abstract

“…Pervasive media environment including different types of terminals and networks brings critical difficulties in achieving universal multimedia access (UMA) [1] which refers to the access and consumption of multimedia content over heterogeneous networks by using diverse terminals in a seamless and transparent way. Video adaptation [2] is an emerging research field that offers a rich set of techniques to address all kinds of adaptation problems for supporting UMA.…”

Section: Introductionmentioning

confidence: 99%

An Attention-Information-Based Spatial Adaptation Framework for Browsing Videos via Mobile Devices

Wang

Chen

2007

EURASIP J. Adv. Signal Process.

View full text Add to dashboard Cite

With the growing popularity of personal digital assistant devices and smart phones, more and more consumers are becoming quite enthusiastic to appreciate videos via mobile devices. However, limited display size of the mobile devices has been imposing significant barriers for users to enjoy browsing high-resolution videos. In this paper, we present an attention-information-based spatial adaptation framework to address this problem. The whole framework includes two major parts: video content generation and video adaptation system. During video compression, the attention information in video sequences will be detected using an attention model and embedded into bitstreams with proposed supplement-enhanced information (SEI) structure. Furthermore, we also develop an innovative scheme to adaptively adjust quantization parameters in order to simultaneously improve the quality of overall encoding and the quality of transcoding the attention areas. When the high-resolution bitstream is transmitted to mobile users, a fast transcoding algorithm we developed earlier will be applied to generate a new bitstream for attention areas in frames. The new low-resolution bitstream containing mostly attention information, instead of the high-resolution one, will be sent to users for display on the mobile devices. Experimental results show that the proposed spatial adaptation scheme is able to improve both subjective and objective video qualities.

show abstract

An Optimal Framework of Video Adaptation and Its Application to Rate Adaptation Transcoding

Cited by 20 publications

References 19 publications

Broadcasting and Communication Convergent Network Based on MPEG-21: Design and Implementation of Multimedia Service Framework

Broadcasting and Communication Convergent Network Based on MPEG-21: Design and Implementation of Multimedia Service Framework

Meta-Modeling QoE

An Attention-Information-Based Spatial Adaptation Framework for Browsing Videos via Mobile Devices

Contact Info

Product

Resources

About