A novel packetisation scheme for MPEG-4 over 3G wireless systems

Ahmad, Zaheer; Sadka, A.H.; Kondoz, A.M.

doi:10.1049/cp:20040685

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…MPEG-4 video packets are generated by combining a number of macroblocks. The previous work has shown that minimum possible packet size results in the best video quality and fast recovery from errors if overheads are compressed [8]. However, no method of header compression was provided.…”

Section: Mpeg-4 Header Compression Schemementioning

confidence: 99%

A novel compression scheme for MPEG-4 headers for visual communication

Ahmad

Sadka

Kondoz

2005

IEE International Conference on Visual Information Engineering (VIE 2005)

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Overheads associated with MPEG-4 video compressed packets reduce bandwidth efficiency. Mobile operators may save a significant percentage of the required bandwidth using IP header compression technologies, and thereby reduce necessary investments. In this paper, a novel header compression scheme for MPEG-4 video packets is proposed and analysed. It is designed to complement existing IP header compression schemes. MPEG-4 video packet headers contribute a significant portion of video packet size, particularly when error resilience options are switched on. Redundancy present in consecutive packet headers permits efficient header compression. The results show significant improvement in video objective and subjective qualities. § Occurance (% ) Figure A1: Average probability of occurrence of motion data length for carphone, foreman and, suzie with different packet sizes and parameter settings.

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Section: Mpeg-4 Header Compression Schemementioning

confidence: 99%

A novel compression scheme for MPEG-4 headers for visual communication

Ahmad

Sadka

Kondoz

2005

IEE International Conference on Visual Information Engineering (VIE 2005)

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“…But these methods concentrate on protecting video data corresponding to their sensitivity to errors and their contribution to overall video quality. For instance, unequal error protection method provides different or proportional level of protection, according to different frame types and partitioned data [1] [2]. These are mainly summarized for considering the error sensitivity and propagation of frame data.…”

Section: Introductionmentioning

confidence: 99%

Unequal Error Protection Based on Objective Video Evaluation Model

Wen¹,

Chen²,

Chen³

et al. 2007

Proceedings of the 3rd International ICST Conference on Mobile Multimedia Communications

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Usually unequal error protection schemes mostly focus on protecting video data parameters with unequal rates or levels depending on their sensitivities to errors. This paper first proposes a novel effective and reliable objective video evaluation model based on fuzzy synthetic judgment. This model highlights a comprehensive evaluation by taking account of multiple properties of the compressed video which affect the whole video sequence, such as quality, fluency and motion information. Secondly, a novel unequal protection scheme is proposed. The protection levels are calculated according to the output of the fuzzy evaluation results. The whole coded video can be transmitted efficiently since the protection is based on the video quality evaluation. Simulation results demonstrate the advantages of the fuzzy objective video quality evaluation model, especially in comprehensive judgment of the whole video, and show the subjective quality improvement obtained by applying the proposed unequal protection approach.

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