Utilising Macroblock SKIP Mode Information to Accelerate Cropping of an H.264/AVC Encoded Video Sequence for User Centric Content Adaptation

Arachchi, Hemantha Kodikara; Dogan, S.; Uzuner, H.; Kondoz, A.M.

doi:10.1109/axmedis.2007.45

Cited by 4 publications

(5 citation statements)

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“…It is clear that by dropping the slices in the compressed domain, we can make the slice-dropping procedure faster. More comparison between our approach and the method proposed in [7] are provided in Table 2. …”

Section: Results and Evaluationmentioning

confidence: 98%

“…This is a remarkable improvement over the methods that use transcoding at the intermediary nodes. For example, the method described in [7] requires 0.371 seconds to process each frame for the Flower video sequence at the intermediary node, whereas our algorithm takes only 0.16 milliseconds. This is caused by the overhead of the cascaded encoding and decoding involved in the transcoding algorithm.…”

Section: Results and Evaluationmentioning

confidence: 99%

“…The region of interest is determined by using an attention based modeling method. In [7], authors use a similar transcoding process for cropping H.264 videos. Additionally, this scheme reduces transcoding complexity by using a special process for encoding SKIP mode macroblocks in the original video.…”

Section: Related Workmentioning

confidence: 99%

“…Cropping technique is applied to perform spatial adaptation in [6] and [7]. In [6], authors employ a set of transcoding techniques based on the H.264 standard to crop the region of interest in each frame.…”

Section: Related Workmentioning

confidence: 99%

See 3 more Smart Citations

Compressed domain spatial adaptation for H.264 video

Shahabuddin

Iqbal

Nazari

et al. 2009

Proceedings of the 17th ACM International Conference on Multimedia

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In this paper, we present a metadata-based compressed-domain spatial adaptation scheme for H.264/AVC video. We have enhanced the H.264/AVC encoder with our proposed adaptation strategies in order to reduce video size by cropping individual frames in an intermediary node prior to transmitting that video to heterogeneous devices. In this regard, we exploit the sliced architecture of the video frames within the first version of the H.264/AVC specification and devise different slicing strategies.The compressed-domain bitstream modification is performed at the intermediary nodes, avoiding the need for any cascaded operations. Here, we briefly present our adaptation scheme as well as evaluation results showing the effectiveness of the slicing strategies on the bitrate reduction and processing time. A comparison of our approach with an existing cropping scheme is also presented.

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Section: Results and Evaluationmentioning

confidence: 98%

Section: Results and Evaluationmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%