**对比文件名称：** US20160173881A1 - VIDEO ENCODING AND DECODING METHOD ACCOMPANIED WITH FILTERING, AND DEVICE THEREOF
**目标专利名称：** 478视频译码中具有非线性自适应环路滤波器的固定滤波器CN113597762B
**模型名称：** Qwen-Max
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## 特征比对表格
| 技术特征描述 | 对比文件原文引用 | 公开性论述 |
| **技术特征A**：《直接公开》 | [0006] "determining...a filter parameter set based on a band including the value of the first sample...filtering a value of the at least one second sample by using the determined filter parameter set"<br>[0095] "The filter parameter sets may be stored in advance."<br>[0095] "the video encoding apparatus 10 may transmit the filter parameter sets via signaling."<br>[0197] "Ch may indicate an input chroma signal...Luma may indicate an input luma signal...{f(i,j,p)} indicates a filter parameter set for correcting a chroma sample value by using a luma sample value" | 对比文件明确公开了滤波器参数集的概念。[0006]段描述了根据样本值的频带来确定滤波器参数集。[0095]段公开了滤波器参数集可以预存储也可以通过信令传输，这与目标专利中固定滤波器集的概念相符。对比文件中的filter parameter set相当于目标专利中的滤波器系数集。 |
| **技术特征B**：《直接公开》 | [0166] "The video decoding apparatus 20 may decode each image of a video for each block."<br>[0340] "A block may include a largest coding unit, a coding unit, a prediction unit, a transformation unit, etc. from among coding units according to a tree structure." | 对比文件[0166]明确描述了视频解码器对图像的每个块进行解码。块在图片(图像)中，这与目标专利中"CTB在视频数据的图片中"的技术特征相符。 |
| **技术特征C**：《隐含公开》 | [0095] "the video encoding apparatus 10 may transmit the filter parameter sets via signaling."<br>[0097] "A total range of a predetermined sample value may be divided into signaled intervals or predetermined intervals."<br>[0201] "M indicates a scale of filter parameters. For example, M may determine a range of a value that a signaled filter parameter may have."<br>[0202] "Bit shifting rightward by a shift value may be referred to as a de-scaling shift." | 对比文件[0201]描述了M表示滤波器参数的尺度，可以决定信号滤波器参数的范围值。这隐含涉及了限幅值的概念。[0097]描述了样本值的总范围可以划分为信号区间或预定义区间，暗示了限幅参数可以设置到最大范围。 |
| **技术特征D**：《直接公开》 | [0197] "[Ch(x,y)+(...M(p)·∑f(i,j,p)·Luma(2ξ+i,2ζ+j)+offset)>>Shift]"<br>[0198] "clipping may refer to an operation of transforming an input signal into a signal corresponding to 0 to 255"<br>[0212] Equation (1)及其描述 | 对比文件在[0197]中描述了滤波公式，其中涉及输入样本减去当前样本的操作(如Luma(2ξ+i,2ζ+j)与Ch(x,y)的关系)。[0198]明确描述了限幅(clipping)操作，将输入信号限制到0到255的范围。对比文件的等式(1)公开了基于限幅值来确定经限幅输入的概念。 |
| **技术特征E**：《隐含公开》 | [0198] "clipping may refer to an operation of transforming an input signal into a signal corresponding to 0 to 255, and matching 0 to a signal corresponding to a value less than 0 and matching 255 to a signal corresponding to a value greater than 255"<br>[0095] "The filter parameter sets may be stored in advance." | 对比文件[0198]描述了限幅操作将值限制到0到255范围，当设置为最大范围(255)时实际上相当于不应用限幅。结合预定义的滤波器参数集，当使用预定义集时可以不应用限幅操作。 |
| **技术特征F**：《直接公开》 | [0212] Equation (1): "Ch(x,y) = Clip((Ch(x,y) + (M(p)·∑f(i,j,p)·Luma(2ξ+i,2ζ+j) + offset) >> Shift))"<br>[0215] 描述了将滤波值加到非校正色度样本值 | 对比文件等式(1)明确公开了应用滤波器的操作：将滤波器参数集(f(i,j,p))乘以样本值，求和后加到当前样本上。这与目标专利中将ALF应用于经限幅输入的技术特征相符。 |
| **技术特征G**：《直接公开》 | [0212] Equation (1): "M(p)·∑f(i,j,p)·Luma(2ξ+i,2ζ+j)"<br>[0217] Equation (2): "a(i,j)·f(i,j,p)·Luma(2ξ+i,2ζ+j)" | 对比文件等式(1)和(2)明确公开了针对每个输入计算乘积的操作：滤波器系数f(i,j,p)乘以输入样本值Luma(2ξ+i,2ζ+j)。这与目标专利技术特征G相符。 |
| **技术特征H**：《直接公开》 | [0212] Equation (1): "M(p)·∑f(i,j,p)·Luma(2ξ+i,2ζ+j)"中的"∑"符号 | 等式(1)中的求和符号"∑"明确公开了对乘积结果求和的操作。这与目标专利技术特征H"对用于所述经限幅的输入的所述乘积求和以确定求和值"完全对应。 |
| **技术特征I**：《直接公开》 | [0212] Equation (1): "Ch(x,y) + (M(p)·∑f(i,j,p)·Luma(2ξ+i,2ζ+j) + offset)"<br>[0215] "the decoder 22 may add a filtered value to a non-corrected chroma sample value" | 对比文件等式(1)明确公开了将求和结果与当前样本(Ch(x,y))相加的操作。[0215]段也明确描述了"将滤波值与非校正色度样本值相加"。 |
| **技术特征J**：《隐含公开》 | [0169] "During in-loop filtering, the video decoding apparatus 20 according to another exemplary embodiment may perform additional filtering other than deblocking filtering and sample adaptive offset (SAO) filtering."<br>[0111] "the video encoding apparatus 10 may transmit the filter parameter sets that correspond to the bands via a picture parameter set (PPS)"<br>[0111] "As another example, the video encoding apparatus 10 may transmit the filter parameter sets that correspond to the bands via a video parameter set (VPS) or a sequence parameter set (SPS)" | 对比文件[0169]描述了环路滤波操作(包括非线性滤波)。[0111]公开了通过PPS、SPS或VPS传输滤波器参数集。虽未明确提及"非线性ALF"和"语法元素指示固定滤波器集是否可用于预测"的组合，但本领域技术人员可以理解滤波器参数集的信令机制。 |
| **技术特征K**：《隐含公开》 | [0095] "the video encoding apparatus 10 may transmit the filter parameter sets via signaling"<br>[0193] "The filter parameter set may be determined in advance or signaled via a bitstream." | 对比文件[0095]和[0193]公开了滤波器参数集可以通过比特流传榆或预定义。这隐含暗示了存在启用/禁用滤波的标志机制。 |
| **技术特征L**：《隐含公开》 | [0095] "The filter parameter sets may be stored in advance."<br>[0198] "clipping may refer to an operation of transforming an input signal into a signal corresponding to 0 to 255" | 对比文件描述了预定义的滤波器参数集和限幅操作。当使用预定义滤波器集时，可以设置最大限幅值而不实际应用限幅。 |
| **技术特征M**：《直接公开》 | [0138] "FIG. 2A is a block diagram of a video decoding apparatus 20, according to various exemplary embodiments."<br>[0140] "The video decoding apparatus 20 based on spatial scalability may receive streams in which image sequences of different resolutions are encoded according to different layers." | 对比文件明确描述了视频解码方法和装置。图2A和相关描述公开了视频解码操作。 |
| **技术特征N**：《直接公开》 | [0066] "FIG. 1A is a block diagram of a video encoding apparatus 10, according to various exemplary embodiments."<br>[0071] "Here hereinafter, an encoding process of the video encoding apparatus 10 will be described." | 对比文件明确描述了视频编码方法和装置。图1A和相关描述公开了视频编码操作。 |
| **技术特征O**：《隐含公开》 | [0157] "The decoder 22 may decode the first layer images by determining a prediction image, combining the prediction image and the residual through motion compensation between same layer images."<br>[0148] "Motion compensation means an operation of synthesizing a reference image determined by using the motion vector of the current image and a residual of the current image and reconfiguring a reconstruction image of the current image." | 对比文件描述了预测图像的确定以及重构过程。[0148]明确描述了运动补偿操作。这隐含公开了基于块生成预测块的概念。 |
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## 总结
对比文件US20160173881A1主要涉及利用亮度和色度样本之间关系进行滤波校正的视频编码/解码方法。该对比文件公开了滤波器参数集的概念、限幅操作、将滤波器系数乘以输入样本并求和的应用过程等技术特征，但在"固定滤波器集"与"最大支持限幅值"的特定组合方面，仅有隐含公开，未完全直接公开目标专利权利要求1的全部技术特征。
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