Calculating masking threshold of every critical band by auditory masking model, then quantization steps are controlled by masking threshold and value of audio carrier of the embedding points.
依据听觉掩蔽模型计算每个临界频带的掩蔽阈值，再根据水印嵌入点处的掩蔽阈值和音频载体值的大小共同控制量化步长。
The subtracter (230) calculates the difference between the output of the adder (250) and the quantized value of the output of the adder (250) to determine the quantization error.
减法器（230）计算加法器（250）的输出和加法器（250）的输出的量化值之间的差以便确定量化误差。
The quantization step is adjusted through the neural network according to the statistics of the blocks, and then the watermark is embedded on the singular value of the blocks.
根据各个分块的统计特性，利用神经网络来确定的各个分块的量化步长，将水印嵌入到各个分块的奇异值。
By the use of the technical proposal provided by the embodiment of the invention, an estimation energy value is not necessarily quantized, thus saving bits of quantization.
使用本发明实施例提供的技术方案，可以不对估计能量值进行量化，节省量化比特。
Method difference F and mean value F are applied to adjust the quantization gap to make the embedded watermark adapt to the Yu carrier image much better.
方差F和均值F被用来调整量化间隔以使嵌入的水印更好地适应于载体图像。
When coding the erroneous image by fractal vector quantization, a self-adaptive 2-d wiener digital filter to filtrate the contracted mean value image, which can result into a good quality codebook.
误差图像进行分形矢量量化编码时，使用设计的自适应二维维纳数字滤波器，对收缩的均值图像进行滤波后，可构造好的码书。
When coding the erroneous image by fractal vector quantization, a self-adaptive 2-d wiener digital filter to filtrate the contracted mean value image, which can result into a good quality codebook.
误差图像进行分形矢量量化编码时，使用设计的自适应二维维纳数字滤波器，对收缩的均值图像进行滤波后，可构造好的码书。
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