What is the definition of 'Perceptual coding' in audio? I- Process of reducing and/or compressing the amount of digital information needed to repr...
What is the definition of 'Perceptual coding' in audio?
I- Process of reducing and/or compressing the amount of digital information needed to reproduce sound before recording.
II- Based on studies of acoustics and hearing, these systems send or throw inaudible information, reducing the 'real state' needed in the storage medium.
III- It is a type of speaker driver that creates sound when a quartz crystal receives electrical energy.
IV- It is a type of noise or sound that has a constant amount of energy in each octave.
a) I and II are correct.
b) II and IV are correct.
c) I and IV are correct.
d) III and IV are correct.
I- Process of reducing and/or compressing the amount of digital information needed to reproduce sound before recording.
II- Based on studies of acoustics and hearing, these systems send or throw inaudible information, reducing the 'real state' needed in the storage medium.
III- It is a type of speaker driver that creates sound when a quartz crystal receives electrical energy.
IV- It is a type of noise or sound that has a constant amount of energy in each octave.
a) I and II are correct.
b) II and IV are correct.
c) I and IV are correct.
d) III and IV are correct.
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Ed 
A definição correta de "Perceptual coding" em áudio é o processo de reduzir e/ou comprimir a quantidade de informação digital necessária para reproduzir o som antes da gravação. Com base em estudos de acústica e audição, esses sistemas enviam ou descartam informações inaudíveis, reduzindo o "estado real" necessário no meio de armazenamento. Portanto, a alternativa correta é a letra a) I e II estão corretas.
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