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Apple Lossless - 版本历史
2026-07-15T15:55:16Z
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<p><b>新页面</b></p><div>{{noteTA<br />
|G1=IT<br />
}}<br />
{{Infobox software<br />
| name = Apple Lossless<br />
| logo =<br />
| screenshot =<br />
| caption =<br />
| author =<br />
| developer = [[蘋果公司]]<br />
| released = {{start date and age|2004|April|28}}<br />
| latest_release_version = {{Start date and age|2011|10|28}}<br />
| latest_release_date =<br />
| latest preview version =<br />
| latest preview date =<br />
| operating_system = <!-- Do not forget your source --><br />
| genre = [[音频编解码器]]<br />
| license = [[Apache License]] 2.0<br />
| website = {{URL|http://alac.macosforge.org}}<br />
}}<br />
{{Infobox file format<br />
| name = Apple Lossless<br />
| logo =<br />
| screenshot =<br />
| caption =<br />
| extensions = {{code|.m4a}} {{code|.caf}}<br />
|_noextcode = 1<br />
| mime =<br />
| type code =<br />
| uniform type =<br />
| magic =<br />
| owner = [[蘋果電腦|Apple Inc.]]<br />
| genre = [[無損壓縮]][[音頻編碼]]<br />
| container for =<br />
| contained by = [[MPEG-4 Part 14]]<br />
| extended from =<br />
| extended to =<br />
| standard =<br />
}}<br />
'''{{lang|en|Apple Lossless}}'''（{{lang|en|Apple Lossless Audio Codec}}，縮寫為{{lang|en|ALAC}}）為[[蘋果公司]]推出的[[无损数据压缩|無損]][[音頻壓縮]]編碼格式，可將非壓縮音頻格式（[[WAV]]、[[AIFF]]）壓縮至原先容量的40%至60%左右，編解碼速度很快。也因為是無損壓縮，聽起來與原檔案完全一樣，不會因解壓縮和壓縮而改變。<br />
<br />
ALAC与MP3的主要区别在于编码过程中，MP3会取消小部分高频及低频部分的音频数据，而ALAC则会如实记录，不会删除音频中任何细节数据。由于资料无损，ALAC音频文件大小会比MP3大，通常每片音乐CD（约70至80分钟）经ALAC编码后，音频文件大小约300MB。<br />
<br />
它是在2004年4月28日公佈的[[iTunes]]4.5和[[QuickTime]]6.5.1的其中一部份。<br />
<br />
ALAC的编码器已于2011年10月26日以[[Apache License]]为协议公布源代码<ref>{{Cite web |url=http://alac.macosforge.org/ |title=Apple Lossless Audio Codec|website=alac.macosforge.org |accessdate=2011-10-28 |archive-date=2016-06-18 |archive-url=https://web.archive.org/web/20160618193112/http://alac.macosforge.org/ |dead-url=no }}</ref>。<br />
<br />
Apple Music中的Lossless Audio使用ALAC編碼技術。<ref>{{cite web |author1=APPLE |title=About lossless audio in Apple Music |url=https://support.apple.com/en-us/HT212183 |accessdate=2023-10-16 |archive-date=2023-11-04 |archive-url=https://web.archive.org/web/20231104155212/https://support.apple.com/en-us/HT212183 |dead-url=no }}</ref><br />
<br />
== 相關條目 ==<br />
*[[Apple Music]]<br />
*[[iPod]]<br />
*[[FLAC]]<br />
*[[Monkey's Audio]]<br />
*[[MPEG-4 ALS]]<br />
*[[TTA]]<br />
*[[WavPack]]<br />
*[[Windows Media Audio|WMA Lossless]]<br />
*[[文件格式列表]]<br />
<br />
== 注释 ==<br />
{{reflist}}<br />
<br />
== 外部連結 ==<br />
* [https://www.apple.com/itunes/ iTunes - Apple]{{Wayback|url=https://www.apple.com/itunes/ |date=20170922185706 }}{{en}}<br />
* [https://www.apple.com/cn/itunes/ iTunes - Apple (中国)]{{Wayback|url=https://www.apple.com/cn/itunes/ |date=20170730124915 }}{{zh-cn}}<br />
* [https://www.apple.com/tw/itunes/ iTunes - Apple (台灣)]{{Wayback|url=https://www.apple.com/tw/itunes/ |date=20170730125102 }}{{zh-hant}}<br />
* [https://web.archive.org/web/20120620124229/http://craz.net/programs/itunes/alac.html ALAC Decoder (crazney.net)]<br />
* [https://www.rarewares.org/lossless.html Apple Lossless decoder (RareWares)]{{Wayback|url=https://www.rarewares.org/lossless.html |date=20080723100118 }}<br />
<br />
{{Compression Formats}}<br />
{{压缩软件}}<br />
<br />
[[Category:无损音频编解码器]]<br />
[[Category:蘋果公司軟體]]<br />
[[Category:IPod]]<br />
[[Category:ITunes]]<br />
[[Category:使用BSD许可证的软件]]</div>
imported>SchlurcherBot