首页> 外文会议>International Symposium on Communications and Information Technologies(ISCIT 2005) vol.1; 20051012-14; Beijgin(CN) >Implementation of Video Encoder with Real-Time Constant- and Variable-Bit-Rate Control
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Implementation of Video Encoder with Real-Time Constant- and Variable-Bit-Rate Control

机译:具有实时恒定比特率和可变比特率控制的视频编码器的实现

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Digital television (DTV) encoder is a very important part of DTV broadcast chain. Most real-time MPEG-2 encoders are designed to perform in a constant-bit-rate (CBR) mode. But an even better compressed stream can be created by employing a variable-bit-rate (VBR) encoding algorithm. VBR can be exploited as a means of achieving statistical multiplexing for digital broadcast satellites. This paper suggests an implementation procedure of DTV video encoder and proposes a novel VBR bit-allocation strategy that could be implemented in this encoder system. Firstly, a real time VBR bit-allocation strategy is deduced. Secondly, system implementation of DTV video encoder and our real time VBR bit-allocation strategy is discussed. Finally, Experimental results demonstrate that our proposed VBR encoder displays a better performance than the CBR encoder.
机译:数字电视(DTV)编码器是DTV广播链中非常重要的一部分。大多数实时MPEG-2编码器被设计为以恒定比特率(CBR)模式执行。但是,通过采用可变比特率(VBR)编码算法,可以创建更好的压缩流。可以将VBR用作实现数字广播卫星统计复用的一种手段。本文提出了DTV视频编码器的实现过程,并提出了可以在该编码器系统中实现的VBR比特分配策略。首先,推导了实时VBR比特分配策略。其次,讨论了DTV视频编码器的系统实现以及我们的实时VBR比特分配策略。最后,实验结果表明,我们提出的VBR编码器显示出比CBR编码器更好的性能。

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