Displaying 3 results from an estimated 3 matches for "psychacoust".
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psychacoustic
2003 Mar 14
0
encoder block diagram
...o any allowed size
- selected window size depends on bitrate
MDCT
- transforms audio data to frequency domain
PSYCHOACOUSTIC MODEL
- Vorbis uses its own psychoacoustic model
- FFT for tonal analys and MDCT for noise analysis
Floor
- a psychoacoustic floor is created from the data, given from the
psychacoustic model
- the floor is a spectral envelope and represents a low resolution
model of the audio spectrum
- floor type 0 uses LSP and floortyp 1 a linear interpolation algorithm
to compute the floor curve
? currently only floor type 1 is used
? don't know whether the MDCT input for the psychoacous...
2002 Dec 21
4
An intresting article
Unintended Consequences of MP3 Compression to Hearing:
http://www.informatik.fh-hamburg.de/~windle_c/Logologie/MP3-Gefahr/MP3-risk.html
Based in some real facts or just someone makeing stuff up?
Chris
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2003 Mar 12
2
encoder block diagram
...o any allowed size
- selected window size depends on bitrate
MDCT
- transforms audio data to frequency domain
PSYCHOACOUSTIC MODEL
- Vorbis uses its own psychoacoustic model
- FFT for tonal analys and MDCT for noise analysis
Floor
- a psychoacoustic floor is created from the data, given from the
psychacoustic model
- the floor is a spectral envelope and represents a low resolution
model of the audio spectrum
- floor type 0 uses LSP and floortyp 1 a linear interpolation algorithm
to compute the floor curve
? currently only floor type 1 is used
? don't know whether the MDCT input for the psychoacous...