Chapter 3 / 3.8 / 3.8.7

3.8.7 What Is Companding?

Learn how companding improves the perceived quality of digitized speech. Explore why compressing low-level speech amplitudes before quantization and expanding them after decoding gives better performance without increasing bit rate.

1. What Does Companding Mean?
2. Why Is Companding Needed?
3. Why Are Low-Level Signals More Affected by Quantization Noise?
4. What Is Dynamic Range?
5. How Does Compression Improve Quantization?
6. What Happens After Transmission?
7. How Does Companding Affect Quantization Levels?
8. Why Is Human Hearing Relevant?
9. What Is μ-law Companding?
10. What Is A-law Companding?
11. Why Are There Two Standards?
12. How Much Improvement Does Companding Provide?
13. Does Companding Increase Bit Rate?
14. Is Companding Lossless?
15. Where Is Companding Used?
16. Is Companding Still Relevant Today?
17. How Does Companding Compare with Increasing the Number of Bits?
18. Why Is Companding Important?

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