Communication Technologies Group, Aragón Institute of Engineering Research, University of Zaragoza, 50018 Zaragoza, Spain.
IEEE Trans Biomed Eng. 2012 Nov;59(11):3212-20. doi: 10.1109/TBME.2012.2207720. Epub 2012 Jul 10.
This paper presents a methodology to transmit clinical video over wireless networks in real-time. A 3-D set partitioning in hierarchical trees compression prior to transmission is proposed. In order to guarantee the clinical quality of the compressed video, a clinical evaluation specific to each video modality has to be made. This evaluation indicates the minimal transmission rate necessary for an accurate diagnosis. However, the channel conditions produce errors and distort the video. A reliable application protocol is therefore proposed using a hybrid solution in which either retransmission or retransmission combined with forward error correction (FEC) techniques are used, depending on the channel conditions. In order to analyze the proposed methodology, the 2-D mode of an echocardiogram has been assessed. A bandwidth of 200 kbps is necessary to guarantee its clinical quality. The transmission using the proposed solution and retransmission and FEC techniques working separately have been simulated and compared in high-speed uplink packet access (HSUPA) and worldwide interoperability for microwave access (WiMAX) networks. The proposed protocol achieves guaranteed clinical quality for bit error rates higher than with the other protocols, being for a mobile speed of 60 km/h up to 3.3 times higher for HSUPA and 10 times for WiMAX.
本文提出了一种通过无线网络实时传输临床视频的方法。在传输之前，提出了一种基于 3D 分层树集合分割的压缩方法。为了保证压缩视频的临床质量，必须对每个视频模式进行特定的临床评估。该评估表明了进行准确诊断所需的最小传输速率。然而，信道条件会产生错误并使视频失真。因此，提出了一种可靠的应用协议，该协议使用混合解决方案，根据信道条件，使用重传或重传与前向纠错（FEC）技术相结合的方法。为了分析所提出的方法，评估了超声心动图的 2D 模式。需要 200 kbps 的带宽来保证其临床质量。已经在高速上行链路分组接入（HSUPA）和微波接入全球互操作性（WiMAX）网络中对使用所提出的解决方案以及单独使用重传和 FEC 技术的传输进行了模拟和比较。在所提出的协议中，对于误码率高于其他协议的情况，可以保证临床质量，对于移动速度为 60 km/h 的情况，在 HSUPA 中的速率要高 3.3 倍，在 WiMAX 中的速率要高 10 倍。
