Research of multimedia integrated broadcast method base on application of unused bandwidth by compression variances

在视频压缩中，所需的带宽取决于场景的特性。当可用带宽像无线电广播一样恒定时，即使它执行缓冲，也会留下无用的时区。这种无用的带宽适用于传送带式数据广播、点播广播等。研究了非流数据的利用方法和调度算法。研究的目的是找出最优的多媒体广播调度算法并提供实际应用。我们从这些观点开始研究。首先，我们用各种视频测量了最大带宽和平均带宽，并观察了左波段是如何发生的。我们考察了无用带的缓冲与必要带的平滑之间的延迟关系，并找出了其特点。其次，假设轮播式数据广播是利用流式数据广播的未使用频带，研究了更优的广播调度，并与提供频带平坦时的最优调度进行了比较。结果表明，当提供平坦带尺寸时，所使用的调度方法应改变为最优调度。此外，还有一个问题是，当视频服务器输出广播数据时，不清楚无用带宽被压缩到多少。我们研究了该解决方案的两种方法。一种是在视频传输定时时只延时1个测量单元的方法。该方法可准确测量未使用的带宽。另一种是根据过去所需带宽的变化预测下一时序所需带宽的方法。当前者用于像运动继电器这样的单向图像输出时，可以判断出1个测量时间单位的延迟不是大问题。当使用后一种方法传输所需带宽波动较大的视频时，预测带宽的估计误差较大。但在带宽变化不大的情况下，如会议，预测相对准确，适合实际应用。以多媒体记录的操作为例，研究了一个应用程序的保护方法。少

In video compression, the necessary bandwidth differs depend upon characteristics of the scene. When an available bandwidth is constant like radio broadcasting, useless time zones are left, even if it performs buffering. This useless bandwidth is applicable to carousel-type data broadcasting, on demand broadcasting and so on. We researched the utilization method of this non-stream type data and the scheduling algorism. The goal of the research was to discover the optimal multi-media broadcast scheduling algorithm and to offer the practical use. We started research from these viewpoints. At first, we measured the maximum bandwidth and the average bandwidth with various videos, and observed how to occur the left band. We examined the relationship of the delay by buffering of useless band between the smoothing of necessary band, and found out the characteristic. Next, if carousel type data broadcasting was assumed as a usage of the unused band with stream type data broadcasting, we resear … More ched optimal broadcast scheduling to compare with the optimal scheduling when supplied band is flat. As a result, it is cleared that used scheduling method should be changed from the optimal scheduling when flat band size is supplied. In addition, there was an issue that a useless bandwidth was unclear how much it was compressed to when the video server output broadcast data. We examined two methods for this solution. One is the method of delaying only 1 measurement unit at the time of video transmission timing. The unused bandwidth is correctly measurable by this method. Another is the method of predicting the required bandwidth of the following timing from change of the past required bandwidth. When the method of former is used for unidirectional image output like sport relay, it could judge that the delay of 1 measurement time unit is not big problem. When the method of latter is used for the transmission of the video with a large fluctuation of required bandwidth, the estimate error of predicted bandwidth is large. However, when there is little change of bandwidth like a meeting, the prediction is comparatively accurate and suitable for practical use. As an applied example, I took up manipulation of multi-Media record for an example and examined a protect method of an application. Less