File format In the face of numerous e-book content providers and reading devices, it is necessary for us to understand some common e-book file formats. Commonly used e-book formats on PC 1. TXT file format This is currently a popular electronic reading file format that is favored by many people. This format also has the most production tools. Its biggest feature is that it is easy to read, simple to produce, and the produced electronic books are quite exquisite. The e-books in this format have embedded reading software, so you can read them without installing a special reader, and there is no high impact on the operating environment. Require. E-books in TXT format were mainly used for text-based book reading before 2004. However, this type of e-books also has some shortcomings. For example, most TXT files produced by related production software do not support Flash, Java, and common audio and video. file, requires IE browser support, etc. However, after 2004, electronic magazines and digital newspapers became popular. Without exception, they all adopted the EXE format and supported FLASH, multimedia and even scripting languages. Magazine format. Currently, digital newspapers, periodicals, and books provided by Founder Apabi’s Feiyue, XPLUS, ZCOM and other manufacturers all use this format. Reading software: Built-in reader, no additional reading software required. 2． PDF file format PDF (Portable Document Format) file format is an electronic file format developed by Adobe. This file format has nothing to do with the operating system platform, that is to say, PDF files are universal whether they are in Windows, Unix or Apple's Mac OS operating system. This feature makes it an ideal document format for electronic document distribution and digital information dissemination on the Internet. More and more electronic books, product descriptions, company announcements, online materials, and emails are beginning to use PDF format files. PDF format files have now become a de facto industry standard for digital information. Adobe designed the PDF file format to support cross-platform, multimedia integrated information publishing and release, especially to provide support for network information release. To achieve this purpose, PDF has many advantages that other electronic document formats cannot compare with. The PDF file format can encapsulate text, fonts, formats, colors, and graphics and images that are independent of device and resolution in one file. Files in this format can also contain electronic information such as hypertext links, sounds and dynamic images, support special-length files, and are highly integrated, secure and reliable. PDF files use industry-standard compression algorithms and are generally smaller than PostScript files, making them easier to transmit and store. It is also page-independent. A PDF file contains one or more "pages" and each page can be processed independently, which is especially suitable for multi-processor systems. In addition, a PDF file also contains the PDF format version used in the file, as well as the positioning information of some important structures in the file. It is precisely because of the various advantages of PDF files that they have gradually become the new favorite in the publishing industry. For ordinary readers, e-books produced with PDF have the texture and reading effect of paper books, and can "lifelikely" display the original appearance of the original book, and the display size can be adjusted arbitrarily, providing readers with a personalized reading method. Since PDF files do not depend on the language and fonts of the operating system and the display device, they are very convenient to read. These advantages enable readers to quickly adapt to e-reading and online reading, which is undoubtedly conducive to the popularization of computers and the Internet in daily life. With PDF file technology as its core, Adobe provides a complete set of electronic and online publishing solutions, including commercial software Acrobat for generating and reading PDF files and Illustrator for editing and producing PDF files. Adobe also provides font packages for reading and printing Asian scripts, that is, Chinese, Japanese and Korean scripts. Reading software: Adobe Acrobat8.1, Adobe Reader8.1, or other third-party reading software. 3. CEB file format CEB is Chinese eBook, which is a completely high-fidelity Chinese e-book format.

The format used by Founder Apabi Reader, a new e-book reading tool developed by Beijing Founder Apabi Technology Co., Ltd. It can retain all information of the characters, fonts, formats and colors of the original document, including pictures, numerical formulas, chemistry Formulas, tables, chess and cards, music scores, etc. At the same time, this format performs good compression on text images, etc., and the data volume of the file is small. CEB layout file technology is based on Founder's world-leading printing and publishing technology, and has become a world-class leader in the field of layout file technology. Since its launch in 2000, Founder's CEB format file technology has been widely used in the fields of e-books and electronic official documents. At the same time, Founder's CEB format file technology can be easily applied to Founder's products in the traditional printing and publishing field. The advantages and technological advancement of CEB: the display remains unchanged under different software and hardware environments and cannot be modified after generation; it integrates the current main font representation technologies: including various encoding systems and various font technologies, and supports ethnic minority languages (Mongolian, Uighur, Tibetan, Korean, etc.); automatically download supplementary characters to ensure that CEB files do not "open the skylight"; provide comprehensive graphics processing technology (including complete descriptions of various linear shapes); provide comprehensive Image and color processing support and compression (such as multiple color spaces, color restoration including ICC, RLE, G3, G4, Wavelet and other data compression); supports electronic signatures, data encryption and other security mechanisms; easy conversion, almost all formats All can be converted into CEB formats, including XML, S2, PS, PDF, TIFF, DOC, WPS, etc.; CEB files take up little space and only one-tenth of the original DOC files when typesetting is more complex; CEB is combined with XML , supports automatic generation of layouts, supports information extraction, and is flexible to use; you can create directories, link jumps, and add sounds, animations, and videos on CEB. Founder CEB format files serve as the basis for electronic document integration and the recommended reference standard for national electronic official document format files. They can present electronic documents in their original form and flavor. The electronic documents cannot be tampered with, ensuring the integrity of the documents. How to apply CEB files? 1. CEB files can be browsed directly through the free Apabi Reader. And can be directly embedded into IE browser for use. 2. It can be read through mobile devices, such as handheld computers, PDAs, and readers to achieve mobile office use. 3. CEB files can be directly printed out as paper documents. 4. CEB files are directly sent to printing machines and digital printing machines to output paper files. 5. CEB files use indexing tools to generate XML document elements to realize file information exchange. 6. CEB files export TXT text files through CEB SDK to realize file retrieval and reuse. Reading software: Apabi Reader3.1, Apabi Inspire Reader2.0 4 STK file format STK file format is an e-book format developed by Yirui Company, which requires the use of the company's handheld readers STAReBOOK and eREAD to read. In 2006, Chengdu Yuetong Company developed eREAD6.0 reading software, which can read STK format books on PC. The main book contents include comics, novels, business, fashion life, and religion. The reader is easy to operate and is especially suitable for reading comic books. In 2007, Chengdu Yuetong Company developed eREAD7.0 reading software, and in 2008, Chengdu Yuetong Company developed eREAD8.0 reading software. This reader software adds reading functions for mobile terminal devices such as psp nds mobile phones. The eREAD reading software integrates a book production function. Users can make their own books by themselves, which meets the needs of users to share books. Most of the free STK books on the Internet are produced by readers themselves and spread on the Internet. Reading software: eREAD6.0 eREAD7.0 eREAD8.0 5. PDG file format PDG (Picture and Text Digitization) format is an image storage format launched by Chaoxing Company. It has the advantages of multi-layer TIFF format. Due to the unique Wavelet transform algorithm has a high image compression ratio. Superstar uses the PDG format as a proprietary format for its digital library browser.

Reading software: Chaoxing Reader SSReader4.0 6. CAJ file format (Chinese academic journal, referred to as CAJ) is the file format of Tsinghua Tongfang Company. China Journal Network provides full-text downloads of journals in this file format. You can use CAJViewer to read and read on this machine. Print CAJ files obtained through "Full Text Database". Reading software: CAJViewer7.0 7. SEP format SEP is a universal, excellent, safe and reliable document distribution and exchange format on the Chinese platform. It is based on the technology of Shusheng Company that has reached the international advanced level. It has developed from layout technology and digital paper technology to intelligent document technology. SEP conforms to the characteristics of traditional paper and can be used to e-ify paper-based applications. Each SEP file is equivalent to several pages of paper documents, and can be attached with many digital features and intelligent features. SEP software can completely convert electronic documents generated by applications from various sources, and can completely retain text, images, graphics, document layout, etc. Shusheng SEP files adopt advanced classification compression methods, and adopt corresponding advanced compression algorithms for images, text, graphics, videos, etc., making the sharing, exchange and archiving of electronic documents an easy and pleasant thing. The free-to-use Shusheng SEP reader and the extensive use of more than 10 million various SEP electronic documents ensure that the technology is easy to use and stable. Shusheng software products using SEP file format and SEP family series document formats provide trustworthy document solutions for document integration work and e-government construction of governments and enterprises and institutions. Reading software: SursenReader 7.0, Sursen SepReader 8. XPS format . Microsoft's next version of office software, Office 12, will provide file storage capabilities in the XPS portable file format, including files saved by applications such as Word, Excel, PowerPoint, Access, Publisher, Visio, OneNote, and InfoPath. XPS. The XPS format is a file based on the Zip compression format. It can be decompressed using Zip or RAR software, and then its internal structure can be seen. This compression scheme also ensures that the size of the XPS file is relatively small. But compression alone is not enough, optimization must be done in some places, such as Subset font, etc. Reading software: Xps viewer 9. WDL file format WDL is an electronic reading file format developed by Huakang Company. Its characteristic is that it retains the original layout design well. You can read online or download electronic books to read locally. However, you need to use the company's special reader DynaDoc Free Reader to read, which can be read from the company's Free downloads from the website. Electronic readings in this format properly protect the interests of authors and publishers due to restrictions on printing and copying. Like the PDF format, this format still does not support some of the above effects. But it supports the import of pictures. This format does a better job of balancing the quality of file images and text with the size of the final product. Files using this format generally have a higher compression rate. It is a good choice for electronic books of all sizes. The production of electronic books in this format requires the use of the company's software DynaDoc generator. There is currently no exclusive version of this software. Readers can go to the company's website to find relevant information about the software. 10. NLC file format NLC format is the electronic book format of the National Library of China. It compresses the scanned book images into small NLC files according to the JBIG standard (lossless compression). NLC files are a variant of the JBIG format.

11. TXT format. TXT format e-books are a text format e-book commonly supported by mobile phones. E-books in this format have large capacity and small space, so they are supported by the majority of people who love to read e-books. Moreover, because This format is an e-book format generally supported by mobile phones, so it is also recognized and loved by the majority of mobile phone users. For mobile phone users who do not have TXT e-book readers on some mobile phones, we would like to recommend a software "MOTO TXT" (this software can be installed on S40 mobile phones, which are mobile phones using the Symbian 4.0 operating system, in English it is symbian 4.0 system , this type of mobile phone is generally a Nokia mobile phone, such as nokia5310, 5610, 6500, etc.). As TXT format e-books are favored by more and more people, the demand for TXT format e-books is gradually increasing. Looking for a website with complete resources to download TXT e-books has become a worry for many people. I would also like to recommend a website with complete resources for TXT e-books "UC e-books". Advantages of txt format: 1: Small size, storage Simple and convenient 2: txt format is relatively simple and will not be poisoned 3: txt format is a common format for computers and many mobile devices 12. CHM file format CHM is the abbreviation of "Compiled HelpManual" in English, that is, "compiled help file". The CHM file format is a help file system based on the characteristics of HTML files launched by Microsoft in 1998. Due to its high similarity with web browsers and many advantages, CHM format e-books and reading materials are widely loved by users. Open source CHM creation tool: chmcreator. Compared with e-books in other formats, CHM format e-books have the following characteristics: 1. Many files can be compressed and integrated into one file, which is easier to read, download and distribute than html, txt and other formats. 2. There is no need to install an additional browser to read under Windows systems, and it is more easily accepted by users than e-books in pdf and other formats. 3. Most Windows systems already have built-in CHM format readers, so e-books in CHM files are only data carriers and do not require higher execution permissions. It is more secure than e-books in exe format. 4. Since the content of CHM format e-books is based on the browser style, it is very close to the browser operation and interface style used by daily users, and is more easily accepted by users. 5. Powerful function configuration. For example, it can provide powerful full-text search, indexing, bookmarking and other functions. Many professional e-book download websites in China provide e-book downloads in various formats, such as "Pinshutang"