Audio Signal Processing and Coding

PROBLEMS

11.1. What are the differences between the SACD and DVD-A formats? Explain using diagrams. Provide bitrates.

11.2. Use diagrams and describe the MLP algorithm employed in the DVD-A.

11.3. How is direct stream digital (DSD) technology employed in the SACD different from other encoding schemes? Describe using a block diagram.

11.4. What is the main idea behind the Integer MDCT and its application in lossless audio coding? Explain in a concise manner and by using mathematical arguments the difference between Integer MDCT (Int MDCT) and the MDCT. Show the utility of the FFT in both.

11.5. Explain using an example the lossless matrixing employed in the MLP. How is this scheme different from the Givens rotations employed in the IntMDCT?

11.6. List some of the key differences between the lossless transform audio coder (LTAC) and the IntMDCT algorithm?

11.7. Survey the literature for studies on fast algorithms for IntMDCT and describe at least one such algorithm. Show how computational savings are achieved.

11.8. Survey the literature for studies on the properties of IntMDCT. Discuss in particular properties dealing with preservation of energy/power (whichever is appropriate) and transform pair uniqueness.

11.9. Describe the concept of noise shaping. Explain how it is applied in the DSD algorithm.