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针对传统视频传输重建图像质量低的问题,提出了一种H.264码流传输的新方案。在信源端,根据H.264码流重要性差异,将其分为两部分。采用MIMO信道传输视频信号,在保持总发射功率恒定的情况下,在两根天线上动态分配发射功率。仿真结果表明,在同等信道条件下,提出的方案有效提高了接收端的重建图像质量。
Aiming at the problem of low quality of reconstructed image in traditional video transmission, a new scheme of H.264 bit-stream transmission is proposed. On the source side, according to the importance of H.264 stream, it is divided into two parts. The MIMO channel is used to transmit the video signal, and the transmit power is dynamically allocated on the two antennas while keeping the total transmit power constant. The simulation results show that the proposed scheme can effectively improve the quality of the reconstructed image at the receiver under the same channel conditions.