CAJ | 학술논문

为提高多媒体系统中视频数据包的丢包恢复率，在传统柯西RS编码和对角交织的基础上，提出对多帧视频数据包进行二次柯西RS编码的优化算法。通过动态选取适当的柯西矩阵，用一次矩阵运算实现对视频源数据包的二次柯西RS编码，并对对角交织进行变形以适应视频数据包的特点。实验结果表明，与传统柯西RS编码算法相比，该算法在相近的解码性能、解码延时和校验包数情况下，能明显提高丢包恢复率。
위제고다매체계통중시빈수거포적주포회복솔，재전통가서RS편마화대각교직적기출상，제출대다정시빈수거포진행이차가서RS편마적우화산법。통과동태선취괄당적가서구진，용일차구진운산실현대시빈원수거포적이차가서RS편마，병대대각교직진행변형이괄응시빈수거포적특점。실험결과표명，여전통가서RS편마산법상비，해산법재상근적해마성능、해마연시화교험포수정황하，능명현제고주포회복솔。
In order to improve the video packet loss recovery rate of the multimedia system, based on traditional Cauchy RS coding and diagonal interleaving, this paper proposes an optimization algorithm by second Cauchy RS coding for multi-frame video data packets. The algorithm achieves twice Cauchy RS coding with one matrix operation by dynamically selecting the appropriate Cauchy matrix, and deforms the diagonal interleaving to adapt to the characteristics of the video data packets. Experimental result indicates that compared with the traditional Cauchy RS coding algorithm, the optimization algorithm can significantly improve the packet loss recovery rate, in the case of similar decoding performance, the decoder delay and the number of parity packets.