首页> 外文会议>Proceedings of the 6th European Embedded Design in Education and Research Conference >GOP level parallelism implementation for real-time H264/AVC video encoder on multicore DSP TMS320C6472
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GOP level parallelism implementation for real-time H264/AVC video encoder on multicore DSP TMS320C6472

机译:多核DSP TMS320C6472上的实时H264 / AVC视频编码器的GOP级并行实现

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In this paper, we exploit the parallelism offered by six-core Digital Signal Processor (DSP) TMS320C6472 to implement the H264/AVC video encoder in order to meet the real-time constraint for different video resolutions. To enhance the encoding speed, GOP Level Parallelism approach is implemented on 5 slave DSP cores. A master core is reserved to manage data transfers among DSP memory and personal computer in order to perform a real-time video encoding demo taken into account video capture and bit-stream storage. Multithreading algorithm and ping-pong buffers technique are used in order to optimize the communication overhead. Experimental results show that our enhanced implementation allows to overcome the real-time constraint by reaching up to 120 f/s (frame/second) for Common Intermediate Format resolution (CIF 352×288) and 35f/s for Standard Definition (SD 720×480). Our proposed approach can save about 80% of run-time for High Definition resolution (HD 1280×720). The Enhanced GOP Level parallelism approach on five DSP cores achieves a good average speedup factor of 4.88 without inducing any quality degradation or bit-rate increment.
机译:在本文中,我们利用六核数字信号处理器(DSP)TMS320C6472提供的并行性来实现H264 / AVC视频编码器,以满足不同视频分辨率的实时约束。为了提高编码速度,在5个从DSP内核上实现了GOP级并行方法。保留了一个主内核,用于管理DSP内存和个人计算机之间的数据传输,以便执行考虑了视频捕获和比特流存储的实时视频编码演示。为了优化通信开销,使用了多线程算法和乒乓缓冲区技术。实验结果表明,我们的增强型实现方式可以克服常见的实时限制,通用中间格式分辨率(CIF 352×288)达到120 f / s(帧/秒),标清(SD 720×)达到35f / s。 480)。我们提出的方法可为高清分辨率(HD 1280×720)节省大约80%的运行时间。五个DSP内核上的增强型GOP级并行性方法可实现良好的平均加速因子4.88,而不会引起质量下降或比特率增加。

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