CAJ | 학술논문

本文针对现代航天测控领域的视频图像传输应用，根据H．264视频编码标准，设计了一种基于TMS320DM642 DsP和FPGA的嵌入式实时视频编解码及无线传输系统，信道编码采用LDPC-BCH级联码。测试结果表明，本系统帧率最高可以达到25Ws，满足视频处理的实时性要求；在误码率为10^-7时，信道编码增益约9dB，且在Eb／N大于等于2．5dB时可以达到近似无误码传输，并获得较好的重建视频质量。
본문침대현대항천측공영역적시빈도상전수응용，근거H．264시빈편마표준，설계료일충기우TMS320DM642 DsP화FPGA적감입식실시시빈편해마급무선전수계통，신도편마채용LDPC-BCH급련마。측시결과표명，본계통정솔최고가이체도25Ws，만족시빈처리적실시성요구；재오마솔위10^-7시，신도편마증익약9dB，차재Eb／N대우등우2．5dB시가이체도근사무오마전수，병획득교호적중건시빈질량。
We design a H. 264-based real-time video codec and transmission system for the video transmission applications in the aerospace measurement and control area, which is based on the TMS320DM642 I)SP and the Field Programmable Gate-Array (FPGA). Furthermore, we use both the error-correcting code Low-Density Parity-check (LDPC) and BCH for the error protection of wireless transmission. The test results show that, the channel coding gain is about 9dB at the Bit Error Rate (BER) of 10.7 ;The system can not only meets the requirement of real-time video processing, but also achieves error-free transmission and obtain good reconstructed video quality when the Eb/ No is no less than 2. 5 dB.