IEEE Transactions on Circuits and Systems for Video Technology

The paper addresses the important issues of resource allocation for scalable video transmission over third generation (3G) wireless networks. By taking the time-varying wireless channel/network condition and scalable video codec characteristic into account, we allocate resources between source and channel coders based on the minimum-distortion or minimum-power consumption criterion. Specifically, ... View full abstract»

Reliable real-time transmission of packetized embedded multimedia data over noisy channels requires the design of fast error control algorithms. For packet erasure channels, efficient forward error correction is obtained by using systematic Reed-Solomon (RS) codes across packets. For fading channels, state-of-the-art performance is given by a product channel code where each column code is an RS co... View full abstract»

A content-based movie parsing and indexing approach is presented; it analyzes both audio and visual sources and accounts for their interrelations to extract high-level semantic cues. Specifically, the goal of this work is to extract meaningful movie events and assign them semantic labels for the purpose of content indexing. Three types of key events, namely, 2-speaker dialogs, multiple-speaker dia... View full abstract»

We present a hand and face segmentation methodology using color and motion cues for the content-based representation of sign language video sequences. The methodology consists of three stages: skin-color segmentation; change detection; face and hand segmentation mask generation. In skin-color segmentation, a universal color-model is derived and image pixels are classified as skin or nonskin based ... View full abstract»

The paper presents an adaptive coding control for real-time video coding systems. Based on temporal correlations, the group-of-pictures (GOP) of a video sequence is split into one basic GOP (BGOP) and many adaptive GOPs (AGOPs) and then processed accordingly. The advantage of this method is to improve the coding efficiency, particularly solving the scene change problem. Even if the coding bit rate... View full abstract»

A novel VLSI architecture for multidimensional discrete wavelet transform (mD DWT) based on a systolic array is proposed. We divide the input mD image data into 2/sup m/ independent data streams, and then simultaneously pipeline them into a multi-filter chip, and finally obtain 2/sup m/ samples which are from different DWT subbands per clock cycles (ccs). The proposed architecture performs a decom... View full abstract»

Motion estimation is an important and computationally intensive task in video coding applications. Block-matching-based fast algorithms reduce the computational complexity of motion estimation at the expense of accuracy. An analysis of computation and performance trade-offs in motion estimation algorithms helps in choosing a suitable algorithm for video/visual communication applications. Fast moti... View full abstract»