Elliott also said that in order to translate what the aliens are actually saying, it may still be necessary to have a code book.
艾略特还说，为了翻译外星人所说的，可能仍然需要一本密码本。
A code USES symbols to replace words, phrases, or sentences. To read the message of a real code, you must have a code book.
一个密码用符号来代替单词，短语或者句子。想要解读一个真正的密码信息，你必须有一个密码本。
The size of the code book for the pitch is enlarged in the all-voiced mode so that the pitch can be more exactly quantized.
将码字索引空间按照带通浊音度模式进行细致划分，全浊音模式下的基音周期得到了更多的码矢量，从而进一步提高了基音周期的量化精度。
However, it is also hard to keep a code book secret for long. So codes must be changed frequently.
然而，让密码本长时间保密，不被他人知道也是很难得。因此必须频繁更换密码。
We introduce the SAR raw data compression coding application with the improved code book and get well experiment effect.
文中还介绍了利用改进的码书对SAR原始数据进行量化编码的应用，得到了较好的效果，并给出了实验结果。
We put forward to improve some modules with large computational complexity, such as pitch estimation module, the adaptive and the fixed code-book research modules.
并提出改进一些计算量较大的模块，如基音估计、自适应码本搜索、固定码本搜索等模块。
We put forward to improve some modules with large computational complexity, such as pitch estimation module, the adaptive and the fixed code-book research modules.
并提出改进一些计算量较大的模块，如基音估计、自适应码本搜索、固定码本搜索等模块。
应用推荐