Wrap Harmonic Broadcasting and Receiving Scheme for Popular Video Service
Wrap Harmonic Broadcasting and Receiving Scheme for Popular Video Service
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流行视频业务的谐波广播接收方案
DOI：
10.1109/tbc.2019.2910231
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发表时间：
2020
影响因子：
4.5
通讯作者：
Junyi Men
中科院分区：
文献类型：
--
作者：
Xingjun Wang;Guobin Cai;Junyi Men
广播已被证明是视频点播（VOD）服务的有效方法。在过去的几十年里，许多学者投入了大量的时间来研究广播。在所有可用的方案中，谐波广播（HB）方案指出了在给定固定观众等待时间的情况下播放流行视频所需的最小带宽。 HB将每个段按照调和级数平均分为几个水平子段。然而，这种分割过于复杂而不可行。为了解决这个问题，我们提出了一种名为wrap HB（WHB）的原始方案，其中我们根据每个段的序列号将其平均划分为垂直子段。给定固定的信道分配，我们的方案的最大段数接近理论上限。与快速广播方案和递归分频方案相比，WHB方案中的缓冲器需求减少了26%。我们还设计了一个简单的VBR WHB（SVWHB）方案，以适应基于WHB方案的VBR视频。综合仿真结果表明SVWHB方案与WHB方案具有相似的节省效果。
Broadcasting has been proved to be an efficacious approach of video-on-demand (VOD) service. Over the past few decades, many scholars have devoted a great deal of time to the study of broadcasting. Among all available schemes, harmonic broadcasting (HB) scheme points out the minimum bandwidth required to broadcast a popular video given a fixed viewers’ waiting time. HB divides each segment equally into several horizontal subsegments in line with the harmonic series. However, such segmentation is too complex to be feasible. To solve this problem, we come up with an original scheme dubbed wrap HB (WHB), in which we partition each segment equally into vertical subsegments according to its serial number. Given a fixed channel allocation, the maximum number of segments of our scheme approaches to the theoretical upper bound. Compared to the fast broadcasting scheme and the recursive frequency-splitting scheme, the buffer requirement in the WHB scheme decreases by 26%. We also design a simple VBR WHB (SVWHB) scheme to accommodate VBR video based on the WHB scheme. The comprehensive simulation results indicate that the SVWHB scheme has similar savings as the WHB scheme.