H.264/AVC-Based Multiple Description Video Coding
Date Issued
2006
Date
2006
Author(s)
Su, Che-Chun
DOI
en-US
Abstract
With the advances of digital video technology and the rapid growth of the Internet and wireless networks, video communication has been gaining in importance. Emerging applications includes: video conferencing, digital video broadcasting, peer-to-peer video transmission, etc. Extensive works on the Internet routing algorithms as well as the video coding techniques have been conducted to provide reliable video transmis-sion over error-prone environments.
Multiple description coding (MDC) has emerged as a promising approach to combat packet losses and enhance error-concealment in video transmission. By using MDC, a video sequence is encoded into multiple independently decodable descrip-tions. As more descriptions are received at the decoder, the reconstructed video with better quality is obtained. These multiple description streams are transmitted along multiple paths to provide reliable transmission over packet-networks. The efficiency of an MDC scheme depends on the way of introducing redundancy into individual descriptions.
An H.264/AVC-based multiple description video coding scheme is proposed. The proposed MDC scheme utilizes the advanced video coding tools and features pro-vided in H.264/AVC, including slice groups, variable block-size motion compensation, and multiple reference frames. Slice groups are adopted to produce multiple descrip-tions. Spatial and temporal correlations between neighboring macroblocks in video frames are exploited to achieve efficient redundancy coding. From the experimental results, the proposed MDC scheme has superior rate-distortion (R-D) performance to previous slice-group based MDC scheme. A complete error-concealment mechanism is also supported by the proposed MDC scheme to handle packet losses. Combined with the current Internet routing algorithms, e.g. an over-lay network, the proposed MDC scheme is capable of providing a practical solution for video transmission.
Subjects
多重描述編碼
影像壓縮
影像傳輸
影像切片
multiple description coding
video compression
video transmission
slice group
Type
thesis
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