MP3（MPEG-1 Audio Layer III）
MP3 是最广为人知的音频格式，使用有损感知压缩将文件大小减少约 90%，同时保持可接受的音质。它使在互联网上存储和分享歌曲成为可能，从而彻底改变了数字音乐。
MIME 类型
audio/mpeg
类型
二进制
压缩
有损
优点
- + Universal playback support on every device and platform
- + Excellent compression for spoken word and music
- + Variable bitrate (VBR) optimizes quality per frame
- + ID3 tags support rich metadata (title, artist, album art)
缺点
- − Lossy compression permanently removes audio data
- − Quality degrades with each re-encoding
- − Surpassed by AAC, Opus, and Vorbis in compression efficiency
何时使用 .MP3
当需要最大兼容性时，将 MP3 用于音乐和语音音频——播客、音乐播放器以及注重文件大小的网络音频。
技术细节
MP3 使用心理声学模型丢弃低于听觉阈值和被更大声音掩蔽的声音。它使用改进的 DCT 和 Huffman 编码，以 8 至 320 kbps 的比特率将音频编码为帧。
历史
Fraunhofer 研究所于 1980 年代末开发了 MP3，并于 1993 年标准化为 ISO/IEC 11172-3。该格式推动了 1990 年代末的数字音乐革命，至今仍被普遍支持。
从 .MP3 转换
转换为 .MP3
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