FLAC 【Free Lossless Audio Codec】
FLAC is one of the lossless compression methods and file formats for audio data.
It can be saved without loss of sound quality. The standard file extension is “.fla” or “.flac”.
FLAC
Most audio data compression methods use lossy compression, which dramatically increases the compression ratio rather than allowing the original data to be modified or lost, but FLAC is so fully compressed that the sound quality does not deteriorate in any way. absolute in principle.
The compression rate cannot be determined unequivocally because it is greatly affected by the audio content, but when a general music CD is used as the sound source, a lossy compression method such as MP3 is reduced to about 1/ 10 while maintaining sound quality. While it can be compressed, FLAC has half to a third of the amount of data that other lossy compression methods have.
The sampling frequency of the corresponding audio data is 1 to 655 350 Hz (655 kHz), the number of quantization bits is 4 to 32 bits, and up to 8 channels can be superimposed and recorded. The compression/decompression method is open to the public, and the standard compression/decompression software (codec) is open to the public under the BSD license.
It also defines a container format (.flac file) that records compressed data to a file, but can also be adopted as a codec for other container standards, such as the Ogg format (.ogg/.oga) and the Matroska format (.mka ). ) In /.mkv), FLAC can be used as one of the audio formats. The FLAC container format also defines the “FLAC uncompressed” format, which allows you to specify uncompressed as an option and records audio to WAV format as is without compression.
