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Writing Quality

Jun 17,2002 0

1. Introduction

 

Review Pages

1. Introduction
2. Pits and Lands
3. Error Correction - Page 1
4. Error Correction - Page 2
5. Error Correction - Page 3
6. CIRC - Page 1
7. CIRC - Page 2
8. CD Decoding system
9. C1/C2 Errors - Page 1
10. C1/C2 Errors - Page 2
11. EFM - Page 1
12. EFM - Page 2
13. Jitter - Page 1
14. Jitter - Page 2
15. Jitter - Page 3
16. Oscilloscope
17. Jitter at DVD
18. Technologies for Reducing Jitter
19. JVC ENC K2
20. AudioMASTER
21. VariREC
22. TEAC Boost Function
23. Testing Equipement - Page 1
24. Testing Equipement - Page 2
25. Calibration media
26. Tests before recording
27. Tests after recording
28. Atomic Force Microscopy

 

Writing Quality - Page 1

- Introduction

We have all heard the familiar clicks and skips from our CD Audio Player that result from a scratched, damaged, or dirty CD disc. Sometimes the effects of disc defects can be subtle and result in audio distortion instead of obvious click and skips. This distortion results from the inability of standard CD player's error correction codes (ECC) to correct for the ablation of the underlying audio information by a scratch defect or electrical noise.

In fact, when the CD ECC fails, many CD drives have special circuitry called "error concealment" circuitry to conceal the errors that ECC was unable to fix. The error concealment circuitry introduces distortion while it tries to interpolate through the errors. Many types if error concealment circuity will even insert audio noise when activated to mask the errors. This is hardly what lovers of high fidelity audio reproduction seek.

In order to complete this article we used information from:

  1. Calimetrics (http://www.calimetrics.com)
  2. ECMA (http://www.ecma.ch/)
  3. Kelin Kuhn's paper (http://www.ee.washington.edu/conselec/CE/kuhn/cdaudio/95x6.htm)
  4. Clover Systems (http://www.cloversystems.com)
  5. YAMAHA Japan (http://www.yamaha.co.jp/computer)
  6. Plextor Europe (http://www.plextor.be)
  7. Pioneer Japan (http://www.pioneer.co.jp)
  8. Quantized (http://www.quantized.com)
  9. MS Science (http://www.mscience.com)
  10. Philips (http://www.licensing.philips.com)
  11. Advanced Surface Microscopy (http://www.asmicro.com/)
  12. Eclipse Data (http://www.eclipsedata.com)
  13. MMC Draft Standard (http://www.t10.org)
  14. JVC Japan (http://www.victor.co.jp/products/others/ENCK2.html)

 

Review Pages

1. Introduction
2. Pits and Lands
3. Error Correction - Page 1
4. Error Correction - Page 2
5. Error Correction - Page 3
6. CIRC - Page 1
7. CIRC - Page 2
8. CD Decoding system
9. C1/C2 Errors - Page 1
10. C1/C2 Errors - Page 2
11. EFM - Page 1
12. EFM - Page 2
13. Jitter - Page 1
14. Jitter - Page 2
15. Jitter - Page 3
16. Oscilloscope
17. Jitter at DVD
18. Technologies for Reducing Jitter
19. JVC ENC K2
20. AudioMASTER
21. VariREC
22. TEAC Boost Function
23. Testing Equipement - Page 1
24. Testing Equipement - Page 2
25. Calibration media
26. Tests before recording
27. Tests after recording
28. Atomic Force Microscopy

 

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