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首页> 外文期刊>Journal of visual communication & image representation >Novel rate control scheme for intra frame video coding with exponential rate-distortion model on H.264/AVC
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Novel rate control scheme for intra frame video coding with exponential rate-distortion model on H.264/AVC

机译：基于H.264 / AVC的指数速率失真模型的帧内视频编码新型速率控制方案

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摘要

Rate control regulates the output bit rate of a video encoder in order to obtain optimum visual quality within the available network bandwidth and to maintain buffer fullness within a specified tolerance range. Due to the benefits of intra-only encoding, such as less computational cost and less latency, it has been more and more widely used. In this paper, we propose an accurate intra-only rate control scheme for H.264/AVC, which includes a novel complexity measurement and a new rate-distortion (R-D) model. We also propose a linear rate-complexity model which takes the intercept into consideration to reduce the estimation error. The proposed R-D model is integrated by the linear rate-complexity model and an exponential rate-quantization model. Based on theoretical analysis and experimental validation, the proposed scheme has high bits prediction precision, and it can also accurately handle buffer fullness. Compared with JVT-W042, our algorithm achieves higher average PSNR and improves the coding quality up to 0.35 dB.
机译：速率控制可调节视频编码器的输出比特率，以便在可用网络带宽内获得最佳视觉质量，并将缓冲区充满度保持在指定的容差范围内。由于仅帧内编码的优点，例如更少的计算成本和更少的等待时间，它已被越来越广泛地使用。在本文中，我们提出了一种用于H.264 / AVC的准确的仅帧内速率控制方案，该方案包括新颖的复杂度测量和新的速率失真（R-D）模型。我们还提出了一种线性速率复杂度模型，该模型考虑了截距以减少估计误差。所提出的R-D模型由线性速率复杂度模型和指数速率量化模型集成。基于理论分析和实验验证，该方案具有较高的比特预测精度，并且还可以准确地处理缓冲区充满度。与JVT-W042相比，我们的算法实现了更高的平均PSNR，并将编码质量提高了0.35 dB。

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