... 固定绕圈 fixed winding 定点实现 fixed-point realization 定点表示[法] fixed-point representation ...
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CDF9/7定点实现方法虽可以解决上述问题，但存在恢复图像质量下降的缺点。
The existed fixedpoint implementation methods of CDF9/7 can solve the problem of computation and storage, but they degrade the quality of the reconstructed image.
但是FTF算法具有众所周知的数值性能不稳定性，该问题在用有限字长定点实现时变得尤为明显。
Numerical unstability of FTF algorithm becomes conspicuous especially when the algorithm is implemented by the finite-word-length fixed-point arithmetic.
系统使用CCD获取原始数字图像数据，采用快速算法实现了核心的二维DCT变换，经过编码后，在一个16位定点DSP上实现了快速图像压缩。
The system uses CCD for getting digital image, uses a 16 bit fix-point DSP to perform fast discret cosine transform(DCT) arithmetic and image encoding and realizes a fast image compression in end.
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