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  2. List of PDF software - Wikipedia

    en.wikipedia.org/wiki/List_of_PDF_software

    As with Adobe Acrobat, Nitro PDF Pro's reader is free; but unlike Adobe's free reader, Nitro's free reader allows PDF creation (via a virtual printer driver, or by specifying a filename in the reader's interface, or by drag-'n-drop of a file to Nitro PDF Reader's Windows desktop icon); Ghostscript not needed. PagePlus: Proprietary: No

  3. LRC (file format) - Wikipedia

    en.wikipedia.org/wiki/LRC_(file_format)

    Title of the song ar: Artist performing the song al: Album the song is from au: Author of the song lr: Lyricist of the song length: Length of the song (mm:ss) by: Author of the LRC file (not the song) offset: Specifies a global offset value for the lyric times, in milliseconds. The value is prefixed with either + or -, with + causing lyrics to ...

  4. List of archive formats - Wikipedia

    en.wikipedia.org/wiki/List_of_archive_formats

    The replacement for the .sit format that supports more compression methods, UNIX file permissions, long file names, very large files, more encryption options, data specific compressors (JPEG, Zip, PDF, 24-bit image, MP3). The free StuffIt Expander is available for Windows and OS X. .sqx SQX: Windows: Windows: Yes A royalty-free compressing format

  5. Audio file format - Wikipedia

    en.wikipedia.org/wiki/Audio_file_format

    Audio file icons of various formats. An audio file format is a file format for storing digital audio data on a computer system. The bit layout of the audio data (excluding metadata) is called the audio coding format and can be uncompressed, or compressed to reduce the file size, often using lossy compression.

  6. Compressed audio optical disc - Wikipedia

    en.wikipedia.org/wiki/Compressed_audio_optical_disc

    A compressed audio optical disc, MP3 CD, or MP3 CD-ROM or MP3 DVD is an optical disc (usually a CD-R, CD-RW, DVD-R or DVD-RW) that contains digital audio in the MP3 file format. Discs are written in the " Yellow Book " standard data format (used for CD-ROMs and DVD-ROMs ), as opposed to the Red Book standard audio format (used for CD-DA audio CDs).

  7. MP3 - Wikipedia

    en.wikipedia.org/wiki/MP3

    The Moving Picture Experts Group (MPEG) designed MP3 as part of its MPEG-1, and later MPEG-2, standards.MPEG-1 Audio (MPEG-1 Part 3), which included MPEG-1 Audio Layer I, II, and III, was approved as a committee draft for an ISO/IEC standard in 1991, [14] [15] finalized in 1992, [16] and published in 1993 as ISO/IEC 11172-3:1993. [7]

  8. Data compression ratio - Wikipedia

    en.wikipedia.org/wiki/Data_compression_ratio

    For signals of indefinite size, such as streaming audio and video, the compression ratio is defined in terms of uncompressed and compressed data rates instead of data sizes: C o m p r e s s i o n R a t i o = U n c o m p r e s s e d D a t a R a t e C o m p r e s s e d D a t a R a t e {\displaystyle {\rm {Compression\;Ratio}}={\frac {\rm ...

  9. List of file formats - Wikipedia

    en.wikipedia.org/wiki/List_of_file_formats

    ?Q? – files that are compressed, often by the SQ program. 7z – 7-zip compressed file; ACE – ace: ACE compressed file; ALZ – ALZip compressed file; ARC – pre-Zip data compression; ARJ – ARJ compressed file; BZ2 – bzip2; CAB – A cabinet file is a library of compressed files stored as one file. Cabinet files are used to organize ...