What is advanced sound coding?

codec - from the encoder/decoder or compressor/decompressor - is software or hardware designed for compression and decompression data streams consisting of audio and/or video data. Compression reduces the size of digital audio and video files, which means that they occupy less storage space and also transmit faster. There are a number of different codecs designed with different goals. One important codecs is advanced sound coding, which often refers to AAC. The formal name is ISO/IEC 14496-3: 2001 (International Organization for Standardization/International Electrical Engineering Commission). It is part of MPEG-2 and MPEG-4 standards and AAC_MP4 compression was further developed from AAC_MP2. Advanced sound coding is considered better than MP3, both in the amount of compression and in sound. Compression can be either without loss and mdash ;; Created so that the original can be accurately restored or loss -up - removal of data bits when compressing files with greater compression, but inability to completelynovit the original file. Advanced sound coding is a loss -making compression format.

There are several different advanced sound coding profiles. The MP4 file expansion applies to the standard MPEG-4 file, while M4A refers to unprotected AAC. The M4P is for protected AAC. The differences between .m4A or .mp4 files on the one hand and the .AAC extension are, on the other hand, that the formats of the signal containers .M4A and .mp4 extend the formats of marking standards and therefore can transfer information about songs and albums that. AAC files. Many players are not accepted.

Advanced sound coding is an open standard. It has been admitted to Apple® QuickTime®, is used in Apples® iTunes® and is the default Apple® iPod® format to ensure high quality sound. Because it supports protected files and therefore management of digital rights (DRM), use AAC in these places POMIt can check access to material protected by iTunes®.