APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SECOND SEMESTER M.TECH DEGREE EXAMINATION, MAY 2016 Electronics &
Communication Engineering

(Signal Processing)

01506314 Audio Signal Processing

Max. Marks : 60 Duration: 3 Hours

Answer any two question from each part

Part A

1.8) Distinguish between Bark scale and Mel scale. (4) 0) Distinguish between Simultaneous
Masking and Temporal Masking in audio signals (5)

2. 2) Explain how head related transfer functions are used in spatial audio design. (5)
b) Write short notes on auditory filter banks (4)
3. Explain how room acoustics play an important role in spatial audio design(9)

Part B
1 . Write short notes on

(a) Redundancy removal (b) Perceptual irrelevancy removal (9)
2. Explain the concept of pre-echo and give any two models to suppress it (9)

3. Write in detail about parametric coding of multichannel audio (9)

Part C
4. a)Describe the tools required to enhance the AAC coding standard (6)
b)Write in detail about MDCT and its properties (6)
5 a)Write short note on Psychoacoustic models (6)

b)Explain the different types of single channel cochlear implants (6) 6.3)
Explain how human cochlea acts as frequency encoder (6) b) Explain deafness.
\Vhat are the auditory system impairments which lead to deafness (6)