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On the Performance of Video Resolution, Motion and Dynamism in Transmission Using Near-Capacity Transceiver for Wireless Communication
Entropy ( IF 2.1 ) Pub Date : 2021-05-01 , DOI: 10.3390/e23050562
Nasru Minallah , Khadem Ullah , Jaroslav Frnda , Laiq Hasan , Jan Nedoma

This article investigates the performance of various sophisticated channel coding and transmission schemes for achieving reliable transmission of a highly compressed video stream. Novel error protection schemes including Non-Convergent Coding (NCC) scheme, Non-Convergent Coding assisted with Differential Space Time Spreading (DSTS) and Sphere Packing (SP) modulation (NCDSTS-SP) scheme and Convergent Coding assisted with DSTS and SP modulation (CDSTS-SP) are analyzed using Bit Error Ratio (BER) and Peak Signal to Noise Ratio (PSNR) performance metrics. Furthermore, error reduction is achieved using sophisticated transceiver comprising SP modulation technique assisted by Differential Space Time Spreading. The performance of the iterative Soft Bit Source Decoding (SBSD) in combination with channel codes is analyzed using various error protection setups by allocating consistent overall bit-rate budget. Additionally, the iterative behavior of SBSD assisted RSC decoder is analyzed with the aid of Extrinsic Information Transfer (EXIT) Chart in order to analyze the achievable turbo cliff of the iterative decoding process. The subjective and objective video quality performance of the proposed error protection schemes is analyzed while employing H.264 advanced video coding and H.265 high efficient video coding standards, while utilizing diverse video sequences having different resolution, motion and dynamism. It was observed that in the presence of noisy channel the low resolution videos outperforms its high resolution counterparts. Furthermore, it was observed that the performance of video sequence with low motion contents and dynamism outperforms relative to video sequence with high motion contents and dynamism. More specifically, it is observed that while utilizing H.265 video coding standard, the Non-Convergent Coding assisted with DSTS and SP modulation scheme with enhanced transmission mechanism results in Eb/N0 gain of 20 dB with reference to the Non-Convergent Coding and transmission mechanism at the objective PSNR value of 42 dB. It is important to mention that both the schemes have employed identical code rate. Furthermore, the Convergent Coding assisted with DSTS and SP modulation mechanism achieved superior performance with reference to the equivalent rate Non-Convergent Coding assisted with DSTS and SP modulation counterpart mechanism, with a performance gain of 16 dB at the objective PSNR grade of 42 dB. Moreover, it is observed that the maximum achievable PSNR gain through H.265 video coding standard is 45 dB, with a PSNR gain of 3 dB with reference to the identical code rate H.264 coding scheme.

中文翻译:

使用近容量收发器进行无线通信的传输中视频分辨率,运动和动态性​​能的研究

本文研究了各种复杂的信道编码和传输方案的性能,以实现高度压缩的视频流的可靠传输。新颖的错误保护方案包括非收敛编码(NCC)方案,差分时空扩展(DSTS)和球面压缩(SP)调制辅助的非收敛编码(NCDSTS-SP)方案以及DSTS和SP调制辅助的收敛编码(使用误码率(BER)和峰值信噪比(PSNR)性能指标分析CDSTS-SP。此外,使用包括SP调制技术并由差分空时扩展辅助的复杂收发器可实现差错减少。通过分配一致的总体比特率预算,使用各种错误保护设置来分析与信道代码结合使用的迭代软比特源解码(SBSD)的性能。此外,借助外部信息传输(EXIT)图表分析了SBSD辅助RSC解码器的迭代行为,以分析迭代解码过程可实现的Turbo悬崖。在采用H.264高级视频编码和H.265高效视频编码标准的同时,利用具有不同分辨率,运动和动态性​​的各种视频序列,分析了所提出的错误保护方案的主观和客观视频质量性能。观察到,在存在嘈杂频道的情况下,低分辨率视频的性能要优于高分辨率视频。此外,据观察,具有低运动内容和动态性的视频序列的性能优于具有高运动内容和动态性的视频序列。更具体地,可以观察到,在利用H.265视频编码标准的同时,具有增强传输机制的DSTS和SP调制方案辅助的非收敛编码会导致Ëb/ñ0参考非收敛编码和传输机制,在目标PSNR值为42 dB时增益为20 dB。重要的是要提到两种方案都采用了相同的编码率。此外,与DSTS和SP调制对应机制的等效速率非收敛编码相比,借助DSTS和SP调制机制的收敛编码实现了卓越的性能,在目标PSNR等级为42 dB时,性能增益为16 dB。此外,可以看出,通过H.265视频编码标准可实现的最大PSNR增益为45 dB,相对于相同的编码率H.264编码方案,PSNR增益为3 dB。
更新日期:2021-05-02
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