视频质量驱动的MPSoC平台中通过优先帧丢失的缓冲区尺寸

Deepak Gangadharan, Haiyang Ma, S. Chakraborty, Roger Zimmermann
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引用次数: 2

摘要

我们研究了一种新的优先帧丢弃方案在缓冲受限的多处理器片上系统(MPSoC)平台中的影响。由于大的片上缓冲器会导致硅面积的增加和成本的提高,精确的缓冲器尺寸引起了人们的广泛关注。多媒体应用程序提供了在缓冲空间中权衡质量的灵活性,而不会造成视频质量的明显下降。帧丢弃方案在这里是至关重要的,以适当地丢弃帧,以减少所需的缓冲区大小,并满足目标质量要求。为此,我们提出了一种简单的优先级丢帧机制,它比现有的丢帧策略更能减少所需的缓冲空间。我们还提供了一个快速迭代过程,用于找到具有O(log(Ndrop))迭代次数的视频剪辑的最小缓冲区大小,其中Ndrop是视频剪辑可以丢弃的最大帧数,以便在峰值信噪比(PSNR)值方面满足预先指定的质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Video quality-driven buffer dimensioning in MPSoC platforms via prioritized frame drops
We study the impact of a novel prioritized frame dropping scheme in buffer-constrained multiprocessor system-on-chip (MPSoC) platforms. Accurate buffer dimensioning has attracted lot of research interest as large on-chip buffers result in increased silicon area and higher costs. Multimedia applications present the flexibility of trading off quality for buffer space without any noticeable deterioration in video quality. The frame dropping scheme is crucial here to drop frames appropriately such that the required buffer size is reduced and target quality requirement is satisfied. Towards this, we propose a simple prioritized frame dropping mechanism which reduces the required buffer space more than existing frame dropping policies. We also provide a fast iterative procedure to find the minimum buffer size for a video clip with O(log(Ndrop)) number of iterations, where Ndrop is the maximum number of frames that can be dropped for a video clip so that a prespecified quality in terms of peak signal to noise ratio (PSNR) value is satisfied.
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