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    • 6. 发明授权
    • Quality scalable coding with mapping different ranges of bit depths
    • 质量可扩展编码,映射不同位深度的范围
    • US08774269B2
    • 2014-07-08
    • US12447005
    • 2006-10-25
    • Detlev MarpeMartin WinkenHeiko SchwarzThomas Wiegand
    • Detlev MarpeMartin WinkenHeiko SchwarzThomas Wiegand
    • H04N7/12
    • H04N19/102H04N19/117H04N19/184H04N19/186H04N19/187H04N19/30H04N19/36H04N19/50H04N19/61
    • A more efficient way of addressing different bit-depths, or different bit-depths and chroma sampling format requirements is achieved by using a low bit-depth and/or low-chroma resolution representation for providing a respective base layer data stream representing this low bit-depth and/or low-chroma resolution representation as well as for providing a higher bit-depth and/or higher chroma resolution representation so that a respective prediction residual may be encoded in order to obtain a higher bit-depth and/or higher chroma resolution representation. By this measure, an encoder is enabled to store a base-quality representation of a picture or a video sequence, which can be decoded by any legacy decoder or video decoder, together with an enhancement signal for higher bit-depth and/or reduced chroma sub-sampling, which may be ignored by legacy decoders or video decoders.
    • 通过使用低位深度和/或低色度分辨率表示来提供代表该低位的相应基本层数据流来实现寻址不同位深度或不同位深度和色度采样格式要求的更有效的方式 深度和/或低色度分辨率表示,以及用于提供更高的比特深度和/或更高的色度分辨率表示,使得可以对相应的预测残差进行编码,以便获得更高的比特深度和/或更高的色度 分辨率表示。 通过这种措施,编码器能够存储可以由任何传统解码器或视频解码器解码的图像或视频序列的基本质量表示以及用于更高位深度和/或降低色度的增强信号 子采样,这可能被传统解码器或视频解码器忽略。
    • 7. 发明授权
    • Encoding method, decoding method, and encoding apparatus for a digital picture sequence
    • 用于数字图像序列的编码方法,解码方法和编码装置
    • US08526492B2
    • 2013-09-03
    • US10584658
    • 2004-11-04
    • Heiko SchwarzTobias HinzThomas Wiegand
    • Heiko SchwarzTobias HinzThomas Wiegand
    • H04N7/12H04N11/02H04N11/04
    • H04N19/577H04N19/115H04N19/124H04N19/149H04N19/172H04N19/176H04N19/177
    • Rate control mechanisms for video encoding aim to provide the best possible video quality while keeping given conditions on transmission rate and decoding delay. In order to achieve a constant video quality, the anchor and non-anchor frames of different frame types are encoded using a different number of bits. However, since video sequences generally contain widely varying picture content and previously coded frames are used to predict a given frame, a suitable assignment of frame target bit rates is hard to determine, especially for non-anchor frames. According to the invention, non-anchor frames are coded using a fixed quantization parameter. Since the quantization parameter used for the encoding of non-anchor frames is directly derived from the average quantization parameter of the previously encoded anchor frame, such approach ensures a constant video quality. Beside of that, the complexity of the rate control strategy is reduced, because no macroblock-level rate control is applied for the encoding of non-anchor frames.
    • 视频编码的速率控制机制旨在提供最佳视频质量,同时保持传输速率和解码延迟的条件。 为了实现恒定的视频质量,使用不同数量的比特对不同帧类型的锚和非锚定帧进行编码。 然而,由于视频序列通常包含广泛变化的图像内容,并且先前编码的帧用于预测给定的帧,因此难以确定帧目标比特率的适当分配,特别是对于非锚帧。 根据本发明,使用固定的量化参数对非锚定帧进行编码。 由于用于非锚定帧的编码的量化参数直接从先前编码的锚帧的平均量化参数导出,所以这种方法确保了视频质量的恒定。 除此之外,由于没有宏块级速率控制被应用于非锚帧的编码,所以速率控制策略的复杂性被降低。
    • 10. 发明申请
    • Process and Arrangement for Encoding Video Pictures
    • 编码视频图像的过程和布置
    • US20080298464A1
    • 2008-12-04
    • US10570092
    • 2004-08-23
    • Tobias HinzHeiko SchwarzThomas Wiegand
    • Tobias HinzHeiko SchwarzThomas Wiegand
    • H04N7/26
    • H04N19/19H04N19/103H04N19/115H04N19/126H04N19/147H04N19/176H04N19/194H04N19/61
    • Today's video codecs require the intelligent choice between many coding options. This choice can efficiently be done using Lagrangian coder control. But Lagrangian coder control only provides results given a particular Lagrange parameter, which correspond to some unknown transmission rate. On the other hand, rate control algorithms provide coding results at a given bitrate but without the optimization performance of Lagrangian coder control. The combination of rate control and Lagrangian optimization for hybrid video coding is investigated. A new approach is suggested to incorporate these two known methods into the video coder control using macroblock mode decision and quantizer adaptation. The rate-distortion performance of the proposed approach is validated and analyzed via experimental results. It is shown that for most bit-rates the combined rate control and Lagrangian optimization producing a constant number of bits per picture achieves similar rate distortion performance as the constant slope case only using Lagrangian optimization.
    • 今天的视频编解码器需要许多编码选项之间的智能选择。 这种选择可以使用拉格朗日编码器控制来有效地完成。 但是拉格朗日编码器控制只提供给定一个特定的拉格朗日参数的结果,这对应于一些未知的传输速率。 另一方面,速率控制算法以给定的比特率提供编码结果,但没有拉格朗日编码器控制的优化性能。 对混合视频编码的速率控制和拉格朗日优化的组合进行了研究。 建议采用新的方法将这两种已知方法并入使用宏块模式决定和量化器适配的视频编码器控制。 提出的方法的速率失真性能通过实验结果得到验证和分析。 显示对于大多数比特率,组合速率控制和拉格朗日优化产生每个图像的恒定比特数,实现与仅使用拉格朗日优化的恒定斜率情况类似的速率失真性能。