![\"Psychoacoustics\"](\"https:\/\/www.mdpi.com\/applsci\/applsci-09-02854\/article_deploy\/html\/images\/applsci-09-02854-g004.png\")
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Introduction to sound<\/p>\n
![\"psychoacoustic\"](\"https:\/\/d3i71xaburhd42.cloudfront.net\/13674722d0e4fc8a6877773b25a62ee9850eb46a\/3-Figure2-1.png\")
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time domain masking
\nMasking that occurs between temporarily adjacent sounds.<\/p>\n
temporary masking<\/p>\n
audio encoding
\nencoding process
\ncoded process<\/p>\n
audio file format
\nAudio File Format ( wiki ): The format of the file that contains the audio data.<\/p>\n
Format Classification
\nLossless formats: such as WAV, FLAC, APE, ALAC, WavPack (WV)
\nLossy formats: such as MP3, AAC, Ogg Vorbis, Opus
\nperformance comparison
\nLatency Comparison
\ndelay compare<\/p>\n
Efficiency Comparison
\nefficiency comparison<\/p>\n
AAC encoding
\nAAC (wiki): Advanced Audio Coding, a proprietary audio coding standard for lossy digital audio compression based on MPEG-2, which appeared in 1997.<\/p>\n
AAC exhibits better sound quality than MP3 and is intended to replace the MP3 format.<\/p>\n
usual format
\nAAC LC : (low complexity) low complexity specification
\nAAC HE V1 : (high efficiency) AAC LC + SBR (Spectral Band Replication)
\nAAC HE V2 : AAC LC + SBR + PS (parametric stereo)
\nac profile<\/p>\n
data exchange format
\nADIF : (Audio Data Interchange Format) Audio Data Interchange Format, can only be decoded from scratch, commonly used in disk files.
\nADTS : (Audio Data Transport Stream) audio transport stream format, each frame has a sync word, which can be decoded at any position in the audio stream for data transmission.<\/p>\n","protected":false},"excerpt":{"rendered":"