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An accurate model of IEEE 802.11e EDCA for video quality analysis is introduced in this paper. The analysis of the model considers not only the effects of collision loss from channel access competition but also wireless loss caused by interferences and fading. Using the model, we derive the video frame loss probability and distribution of access de...
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... MPEG-4 coding, the video sequence can be decomposed into smaller units, GOP (Group of Pictures). A GOP pattern G(N, M ) is characterized by two parameters: where N is the I-to-I frame distance and M is the I-to-P frame distance (as shown in Fig. 2). According to the coding relation, in MPEG-4 video stream the most important video type is the I- frame, with the P-frame being more important than B-frame. The impact of a lost B-frame is only for itself, but a loss of I or P-frame may cause more than one frame or even a whole GOP to be destroyed. For simplicity, we do not consider ...
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