通过基于波段的残余神经网络进行λ-域速率控制,用于VVC HDR内部编码
概括
本文介绍了一种用于多功能视频编码 (VVC) 高动态范围 (HDR) 内部的新速率控制算法. 数据驱动的方法提高了HDR视频压缩效率和视觉质量.
科学领域:
- 视频压缩方法 视频压缩
- 图像处理 图像处理
- 机器学习 机器学习
背景情况:
- 高动态范围 (HDR) 视频提供了增强的现实主义,但也带来了压缩挑战.
- 现有的多功能视频编码 (VVC) 速率控制算法针对标准动态范围 (SDR) 进行了优化,在HDR内容上表现不佳.
- 有效的速率控制对于高效的HDR视频交付至关重要.
研究的目的:
- 开发一个数据驱动的速度控制算法,用于VVC HDR内.
- 为了解决当前VVC频率控制对HDR视频的局限性.
- 为了提高HDR视频压缩的编码效率和视觉质量.
主要方法:
- 对HDR内部编码特征的分析.
- 为HDR内开发一个零碎的Rate-Lagrange参数 (R-λ) 模型.
- 基于波段的残余神经网络 (WRNN) 的实施,以优化CTU级位分配.
- 创建一个大规模的HDR数据集,用于训练WRNN.
主要成果:
- 拟议的零碎R-λ模型准确地捕捉了HDR内部的速率-扭曲关系.
- WRNN有效地预测R-λ模型参数,以优化位分配.
- 实验结果表明,与最先进的方法相比,编码性能优越.
- 开发的算法实现了更好的压缩效率VVC HDR内编码.
结论:
- 拟议的数据驱动的λ域速率控制算法显著增强了VVC HDR内编码.
- 基于WRNN的方法为HDR视频压缩中的深度学习应用提供了一个有希望的方向.
- 该算法为优化HDR视频交付提供了强大的解决方案.
相关概念视频
01:07Time-Domain Interpretation of PD Control
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Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
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01:24Frequency-Domain Interpretation of PD Control
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Proportional-Derivative (PD) controllers are widely used in fan control systems to improve stability and performance. A fan control system can be effectively represented using a Bode plot to illustrate the impact of a PD controller through its transfer function. The Bode plot visually conveys how PD control modifies the fan's response across various frequencies, providing a frequency domain interpretation of the controller's behavior.
The proportional control gain, combined with the...
The proportional control gain, combined with the...
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01:26Linear Approximation in Frequency Domain
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Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
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01:21Linear Approximation in Time Domain
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01:18Reducing Line Loss
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With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss...
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01:20Deconvolution
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Deconvolution, also known as inverse filtering, is the process of extracting the impulse response from known input and output signals. This technique is vital in scenarios where the system's characteristics are unknown, and they must be inferred from the observable signals.
Deconvolution involves several mathematical techniques to derive the impulse response. One common approach is polynomial division. In this method, the input and output sequences are treated as coefficients of...
Deconvolution involves several mathematical techniques to derive the impulse response. One common approach is polynomial division. In this method, the input and output sequences are treated as coefficients of...
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