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首页> 外文会议>2014 2nd International Conference on Emerging Technology Trends in Electronics, Communication and Networking >Hybrid error correction method using HEVC standard in heterogeneous environment
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Hybrid error correction method using HEVC standard in heterogeneous environment

机译：异构环境下使用HEVC标准的混合纠错方法

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It has been observed that in the heterogeneous environment for the transmission of multimedia data packet loss rate and packet length is varying. Also, there is a need to recover the data at the receiver end even in the worst environment conditions by error correction and detection techniques. Forward error correction (FEC) provides poor performance when packet loss is higher and packet length is larger. As per survey, it is proved that multiple description coding (MDC) out performs than FEC in this condition. The performance of MDC is even better when High Efficiency Video Coding (HEVC) is used as a source coding standard. On considering this point, we have proposed a scheme in which HEVC is used as a prior stage of MDC and we use FEC as the standard encoder to implement MDC. In this scheme, three routes are defined for sending the packets, according to the environment conditions and available bandwidth the one which best suits will be selected. As HEVC is used to fulfill the demand of sending high resolution video by reducing bit rate requirement by providing better coding efficiency [3] which is the key point of using it in our scheme. Due to this, better video quality will be obtained for 4k × 2k resolution and even the problem with the heterogeneous environment will be solved. By the results we have observed that at low bit rate performance of HEVC is better than H264 in terms of PSNR and when packet length is large and packet loss rate is high then combination of MDC and FEC (a double or multiple description coding scheme) outperforms FEC (a single description coding scheme).
机译：已经观察到，在用于多媒体数据传输的异构环境中，分组丢失率和分组长度是变化的。另外，即使在最恶劣的环境条件下，也需要通过纠错和检测技术在接收机端恢复数据。当数据包丢失率更高且数据包长度较大时，前向纠错（FEC）的性能将很差。根据调查，证明了在这种情况下，多描述编码（MDC）的性能比FEC更好。当高效视频编码（HEVC）用作源编码标准时，MDC的性能甚至更好。考虑到这一点，我们提出了一种方案，其中HEVC被用作MDC的前期，并且我们使用FEC作为标准编码器来实现MDC。在该方案中，定义了三种路由来发送数据包，根据环境条件和可用带宽，将选择最适合的一条。由于HEVC通过提供更好的编码效率[3]来降低比特率要求，从而满足发送高分辨率视频的需求，这是在我们的方案中使用它的关键点。因此，对于4k×2k分辨率，可以获得更好的视频质量，甚至可以解决异构环境的问题。结果表明，在低比特率下，HEVC在PSNR方面优于H264，并且当数据包长度较大且数据包丢失率较高时，MDC和FEC（双或多描述编码方案）的组合将胜过FEC（单一描述编码方案）。

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