AI 中文总结
研究具有反馈的突发噪声通信信道的可变速率有损信源 - 信道编码，采用多级信道优化矢量量化系统，通过贪婪算法动态分配比特，相比固定速率方案，在多种信道条件下信噪比增益可达约4.5dB。
AI 中文摘要
介绍了一种用于具有无噪声反馈的突发噪声通信信道的可变速率有损联合信源 - 信道编码方案。该方案包括一个多级信道优化矢量量化系统，它基于通过反馈链路在编码器处接收到的信道输出序列，通过贪婪算法在每个阶段的可变速率残余量化器之间动态分配比特，从而推广了先前的固定速率方案。在M阶马尔可夫噪声波利亚传染信道上的仿真表明，所提出的可变速率方案始终优于固定速率方案，无论信道误码率和噪声相关性如何，实现了高达约4.5dB的信噪比增益。
英文摘要
A variable-rate lossy joint source-channel coding scheme for burst-noise communication channels with noiseless feedback is introduced. The scheme comprises a multi-stage channel optimized vector quantization system that dynamically allocates bits via a greedy algorithm among the variable-rate residual quantizers at each stage, based on the channel output sequence received at the encoder through the feedback link, thereby generalizing a prior fixed-rate scheme. Simulations over an $M$-th order Markov noise Polya contagion channel demonstrate that the proposed variable-rate scheme consistently outperforms the fixed-rate scheme, regardless of the channel bit error rate and noise correlation, achieving signal-to-noise ratio gains of up to about 4.5 dB.
