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Efficient camera motion characterization for MPEG video indexing
A novel approach to camera motion analysis is proposed to index videos compressed in MPEG-1 or MPEG-2. Specifically, it fits the motion vectors in the MPEG stream into the two-dimensional affineExpand
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Relay Precoding for Non-Regenerative MIMO Relay Systems with Partial CSI Feedback
We consider a relay precoding problem in a non-regenerative multiple-input multiple-output (MIMO) relay system, where the relay has the perfect channel state information of the source-relay link andExpand
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Precoder design of non-regenerative relays with covariance feedback
In this letter, the optimal form of the precoding matrix is initially derived to maximize the ergodic capacity between the source and destination with covariance information of the relay-destinationExpand
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An Adaptive Determination of Channel Information Feedback Period in OFDMA Systems
  • Hyeju Oh, H. Kim
  • Computer Science
  • IEEE International Symposium on Consumer…
  • 11 September 2006
OFDMA is considered as a promising solution for improving the performance of interactive wireless broadcasting systems. This work focuses on packet scheduling techniques with an adaptive channelExpand
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Optimal Training Signal Design for Estimation of Correlated MIMO Channels in Two-Way Amplify-and-Forward Relay Systems
In this study, we design a training signal for a correlated two-way amplify-and-forward (AF) relay channel, where the relay system consists of two sources and one relay, and each terminal is equippedExpand
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On estimating the direction of arrival when the number of signal sources is unknown
Abstract A new problem, estimation of the direction of arrival (DOA) without knowing (or assuming) the number of signal sources, is addressed. In this paper we propose a method which is related toExpand
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MMSE precoder design for a non-regenerative MIMO relay with covariance feedback
  • D. Kim, H. Kim
  • Computer Science
  • 21st Annual IEEE International Symposium on…
  • 1 September 2010
In this paper, we propose a precoder using a minimum mean-square error (MMSE) criterion for a non-regenerative relay system. It is assumed that the relay knows the channel covariance informationExpand
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An optimum power management scheme for wireless video service in CDMA systems
An optimum power management scheme is proposed for intra-frame refreshed image sequences of the wireless video service in code-division multiple-access (CDMA) systems. The end-to-end distortion ofExpand
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Modified cubic convolution scaler with minimum loss of information
The authors derive an adaptive version of cubic convolution interpolation for the enlargement or reduction of digital images by arbi- trary scaling factors. The adaptation is performed in eachExpand
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An Optimal Framework of Video Adaptation and Its Application to Rate Adaptation Transcoding
The adaptation of video according to the heterogeneous and dynamic resource constraints on networks and devices, as well as on user preferences, is a promising approach for universal access andExpand
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