21 Result(s)
within
Conference Paper
Ki-Dong Chung
-
Chapter and Conference Paper
Fast Mode Decision by Exploiting Spatio-temporal Correlation in H.264
The H.264 video coding standard provides considerably higher coding efficiency than those of previous standards but its complexity is significantly increased. In this paper, we propose an efficient method of f...
-
Chapter and Conference Paper
Fast Inter-skip Mode Selection Algorithm for Inter Frame Coding in H.264/AVC
The H.264/AVC provides gains in compression efficiency of up to 50% over a wide range of bit rates and video resolutions compared to previous standards. However, these features incur a considerable increase in...
-
Chapter and Conference Paper
A Flash File System to Support Fast Mounting for NAND Flash Memory Based Embedded Systems
In embedded systems, NAND flash memory is typically used as a storage medium because of its non-volatility, fast access time and solid-state shock resistance. However, it suffers from out-place-update, limited...
-
Chapter and Conference Paper
Fast Mounting and Recovery for NAND Flash Memory Based Embedded Systems
Even though its advantages such as non-volatility, fast write access time and solid-state shock resistance, NAND flash memory suffers from out-place-update, limited erase cycles, and page-based I/O operations....
-
Chapter and Conference Paper
DCT Block Conversion for H.264/AVC Video Transcoding
In H.264/AVC [1], integer transforms are applied instead of the 8×8 discrete cosine transform (DCT) of previous standards to avoid inverse transform mismatch problems. However, these transforms make it difficu...
-
Chapter and Conference Paper
Adaptive Congestion Control Scheme Based on DCCP for Wireless/Mobile Access Networks
In this paper, we propose an adaptive congestion control scheme to control congestion caused in wireless/mobile access networks of ubiquitous computing environment. Significantly, this scheme includes a new re...
-
Chapter and Conference Paper
Conversion Scheme for DCT-Domain Transcoding of MPEG-2 to H.264/AVC
The 4×4 approximate discrete cosine transform (DCT) of H.264/AVC [1] makes it difficult to transcode the pre-coded video contents with the previous video coding standards to H.264/AVC in DCT domain. This is du...
-
Chapter and Conference Paper
Half-Pixel Correction for MPEG-2/H.264 Transcoding
To improve video quality and coding efficiency, H.264/AVC [1] has adopted several newer coding tools such as a 4×4 integer DCT and a method for calculating half pixels than the previous standards. However, the...
-
Chapter and Conference Paper
An Improved Handoff Technique for a Seamless Multimedia Services
Servicing mobile hosts over the Internet has some problems including nodes’ location, independent addressing, address conversion and packet forwarding as well as mobile host’s location management. However, pac...
-
Chapter and Conference Paper
A Session Mobility Scheme for Seamless VOD Service in Ubiquitous Environments
In ubiquitous environments, a user is free to move one space to another. Thus, VOD applications should be able to provide seamless video delivery to a mobile user. In this paper, we propose a session mobility ...
-
Chapter and Conference Paper
Dynamic Resource Reservation Using the Differentiated Handoff Estimation Model for Mobile Networks
In this paper, we propose a differentiated handoff estimation model and a dynamic resource reservation scheme. The differentiated handoff estimation model is modeled with the reducible Markov chain based on in...
-
Chapter and Conference Paper
An Improved Handoff Technique for a Seamless Multimedia Services
Servicing mobile hosts over the Internet has some problems including nodes’ location, independent addressing, address conversion and packet forwarding as well as mobile host’s location management. However, pac...
-
Chapter and Conference Paper
UVOD: A **i-Based Ubiquitous VOD Service Architecture
In this paper, we present a ubiquitous VOD service architecture (UVOD) that provides mobile users with a seamless VOD service.
-
Chapter and Conference Paper
Video Coding Using Supplementary Block for Reliable Communication
In this paper, we propose a video source coding scheme, called Supplementary Block based Encoding, to protect the propagation of the transmission errors over the network. Unlike the conventional source coding ...
-
Chapter and Conference Paper
An Alternative Multicast Transmission Scheme for VCR Operations in a Large VOD System
Multicast delivery is one of solutions to reduce the cost in large VOD systems. However, it is difficult to implement the interactive operations for an individual user in multicast transmission system. In this...
-
Chapter and Conference Paper
An ACK-Based Redundancy Control Algorithm in Periodic FEC
Error propagation is the main problem in transmitting a real-time interactive video over the Internet. A lot of work and research has been done to solve this problem. Periodic FEC[4], proposed by Choi et al., is ...
-
Chapter and Conference Paper
Robust Video Transmission Using RSE-Code-Based FEC
The RSE(Reed-Solomon Erasure) code is widely used to prevent packet loss over a lossy network. RSE-code-based FEC does not require additional network delay but needs much additional network bandwidth to transm...
-
Chapter and Conference Paper
Adaptive Call Admission Control for Mobile Multimedia Network
The rapid growth of the mobile environment has been resulted in servicing not only voice data but also multimedia data. Specially, mobility is a significant feature in mobile environment. In this paper, we pro...
-
Chapter and Conference Paper
An Adaptive Periodic FEC Scheme for Internet Video Applications
When transmitting packets compressed with a high compression standard such as MPEG or H.261, the loss of single packet has a considerable effect on the following frames because of motion estimation and compens...
-
Chapter and Conference Paper
Proxy Caching Based on Patching Scheme and Prefetching
In this paper, we propose a proxy caching policy using both prefetching and patching technique for the efficient continuous media stream service on the network. In the proposed proxy caching policy, caching is...
