The important thing to note is that for both Ogg and Flac, encoding is from PCM to the encoded (Ogg/Flac) format, and decoding is from the encoded (Ogg/Flac) format to PCM. On playback, the 700 kb of FLAC data is “decoded” (perfectly) back to 1411.2 kb of PCM data and then played for you to listen to. However, you also say that your media player does support FLAC format.įLAC encoding is able to take 1411.2 thousand bits of “PCM” data each second and “encode” the data cleverly so as to reduce the number of bits to somewhere around 700 thousand bits of “FLAC” data per second. In other words, your media player is not able to decode the 160 kb of “Ogg data” back to 14411.2 kb of “PCM” data.
In your case, you say that your media player does not support Ogg. What happens in a media player that supports Ogg playback is that the Ogg file is decoded, so that the 160 kb of Ogg data each second is expanded back to 1411.2 kb of PCM data per second, which can then be played back as analog sound for you to listen to. The way this happens is the the Ogg encoder takes the 1411.2 thousand bits of “PCM” data each second and “encodes” the data cleverly so as to reduce the number of bits to only 160 thousand bits of “Ogg” data per second. In comparison, an Ogg encoded file may represent the same analog sound in around 160 kbps. In other words, it has a “bit rate” of “1411200 bits per second” (1411.2 kbps). To be precise, CD audio uses 1411200 bits of data for every second of audio. I dont’ understand why If I only change the compression method, so from OGG(VORBIS) to FLAC, but datas are less than the original CD, files becomes huge.Īs you are aware, CD audio uses a huge amount of digital data to represent that analog audio.
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