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假设一个文件中出现了8种符号S0,SQ,S2,S3,S4,S5,S6,S7,那么每种符号要编码,至少需要3bit。假设编码成000,001, 010,011,1...
假设一个文件中出现了8种符号S0,SQ,S2,S3,S4,S5,S6,S7,那么每种符号要编码,至少需要3bit。假设编码成000,001, 010,011,100,101,110,111。那么符号序列S0S1S7S0S1S6S2S2S3S4S5S0S0S1编码后变成 000001111000001110010010011100101000000001,共用了42bit。我们发现S0,S1,S2这3个符号出现的频率比较大,其它符号出现的频率比较小,我们采用这样的编码方案:S0到S7的码辽分别01,11,101,0000,0001,0010,0011, 100,那么上述符号序列变成011110001110011101101000000010010010111,共用了39bit。尽管有些码字如 S3,S4,S5,S6变长了(由3位变成4位),但使用频繁的几个码字如S0,S1变短了,所以实现了压缩。对于上述的编码可能导致解码出现非单值性:比如说,如果S0的码字为01,S2的码字为011,那么当序列中出现011时,你不知道是S0的码字后面跟了个1,还是完整的一个S2的码字。因此,编码必须保证较短的编码决不能是较长编码的前缀。符合这种要求的编码称之为前缀编码。要构造符合这样的二进制编码体系,可以通过二叉树来实现。-Suppose a file appears in eight kinds of symbols S0, SQ, S2, S3, S4, S5, S6, S7, then each symbol to be encoded, at least 3bit. Suppose encoding 000,001, 010,011,100,101,110,111. Then the symbolic sequence S0S1S7S0S1S6S2S2S3S4S5S0S0S1 encoded into 000001111000001110010010011100101000000001, sharing a 42bit. We found that S0, S1, S2 these three symbols the frequency of relatively large, the other symbols the frequency is relatively smal
- 2022-04-27 21:17:34下载
- 积分:1
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data structure Hash Table Application
数据结构 哈希表应用-data structure Hash Table Application
- 2023-05-02 12:40:03下载
- 积分:1
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Oracle BerkeleyDB
Oracle BerkeleyDB--SQLitehttp--www_sqlite_com_cn-_files2.rar//bdb2
- 2022-04-30 08:41:25下载
- 积分:1
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数据结构课程的作业,代码通俗易懂,且运行效率高。
数据结构课程的作业,代码通俗易懂,且运行效率高。-Data structure course work, the code easy to understand, and operating efficiency.
- 2023-04-03 23:55:04下载
- 积分:1
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This is a materials management system, some errors, but also please correct!
这是一个物资管理系统,有些错误,还请大家更正!-This is a materials management system, some errors, but also please correct!
- 2022-02-01 20:09:58下载
- 积分:1
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Algorithm category, the combined ranking of the source code, from the Introducti...
算法类,合并排序的源代码,来自算法导论上的-Algorithm category, the combined ranking of the source code, from the Introduction to Algorithms
- 2022-04-21 13:58:30下载
- 积分:1
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使用ADO +
ado+ACCE
- 2022-01-28 20:28:57下载
- 积分:1
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数据库操作,封装了BDE数据库操作的所有方法。C编译器…
数据库操作类,封装了BDE数据库操作的所有方法。 编译环境 C++ Builder6 下通过。-database operations, a package of database operation BDE all methods. C compiler environment Builder6 through.
- 2022-02-03 05:20:06下载
- 积分:1
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实现的功能是把数据库中的记录显示到列表视图中,可以进行记录添加、删除、修改、查询等操作...
实现的功能是把数据库中的记录显示到列表视图中,可以进行记录添加、删除、修改、查询等操作-the functions of the database records to the list view and can be recorded to add, delete, modify, search operation
- 2022-10-20 20:55:04下载
- 积分:1
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Oracle BerkeleyDB(Oracle内嵌数据库,没有提供Borland C++Builder编译版本),该源码把BerkeleyDB 4.5.20的...
Oracle BerkeleyDB(Oracle内嵌数据库,没有提供Borland C++Builder编译版本),该源码把BerkeleyDB 4.5.20的Visual C++ 2005的代码移植到Borland C++Builder上编译,生成静态库,可以在Borland C++Builder中进行开发使用.
工程文件路径为:
db-4.5.20uild_windowsLibdb45BCB.bpr
编译后生成静态库为:
Libdb45BCB.lib-Oracle BerkeleyDB (Oracle embedded database failed to provide Borland C Builder version), The source put BerkeleyDB 4.5.20 2005 Visual C code transplant Bo Identical compiled C Builder, generate static libraries, in Borland C Builder for development use. paper trails for the project : db- 4.5.20 build_windows Libdb45BCB.bpr compiler After generating static libraries : Libdb45BCB.lib
- 2022-07-22 09:54:39下载
- 积分:1