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文中提出了无线信道下视频数据的一种新的组合式差错控制算法。该算法主要针对以下三个方面提出了创新,首先在信源的数据划分上,针对不等差错防护技术进一步提出了交错式控制思想。然后从信道编码方面针对现有前向纠错技术多采用多参数RS编码方式的复杂性和局限性,提出了一种UEP型RS十CRC差错控制算法。最后在不同的信道状态,保证一定的失真度情况下,提出采用合理的帧长及组包算法,使得传输功耗能够得到降低。最后根据实时媒体特性,对不同的数据丢包率进行了仿真,从仿真结果表明,该算法可以在降低失真度的同时,节省传输功率,其中在信道编码上可以降低50%左右的功耗。因此可达到最佳端到端功耗控制的效果。
In this paper, a new combined error control algorithm for video data over wireless channels is proposed. The algorithm is mainly for the following three aspects of the proposed innovation, first of all in the data source division, for unequal error protection technology further proposed interleaved control ideas. Then, from the aspect of channel coding, the complexity and limitation of multi-parameter RS coding method are mostly used in the existing forward error correction techniques. A UEP RS-CRC error control algorithm is proposed. Finally, under different channel conditions and guaranteeing a certain degree of distortion, a reasonable frame length and packet matching algorithm are proposed to reduce transmission power consumption. Finally, according to the real-time media characteristics, different data packet loss rates are simulated. Simulation results show that this algorithm can reduce the distortion and save transmission power. The channel coding can reduce the power consumption by about 50%. So you can achieve the best end-to-end power control effect.