Memorex MRX-525GE
5. Daxon CD-R
Review Pages
2. CD - DVD Reading
3. CD Error Correction
4. DVD Error Correction
5. Daxon CD-R
6. MMM&M CD-R
7. Taiyo Yuden CD-R
8. TDK CD-R
9. Verbatim CD-R
10. Verbatim CD-RW
11. The DaTARIUS DVD Analyzer R 2x
12. CMC MAG M01 000 (00) DVD+R
13. MAXELL 003 000 (00) DVD+R
14. DAXON AZ3 (000) DVD+R
15. MCC 003 DVD+R
16. RICOHJPN R03 004 (04) DVD+R
17. YUDEN000 T03 DVD+R
18. RITEK R04 DVD+R
19. CMC MAG AM3 DVD-R
20. DAXON016S DVD-R
21. CMC MAG AE1 DVD-R
22. OPTODISC R016 DVD-R
23. MCC 03RG20 DVD-R
24. RITEK F1 DVD-R
25. TTH02 DVD-R
26. MKM 01RD30 DVD-R DL
27. MKM 03 RD30 DVD-R DL
28. RITEK S04 001 DVD+R DL
29. MKM 003 (000) DVD+R DL
30. MKM 01RW6X01 DVD-RW
31. RITEKW06 DVD-RW
32. RITEKW04 DVD-RW
33. MKM A03 DVD+RW
34. RICOHJPN W21 DVD+RW
35. INFODISC A10 001 DVD+RW
36. MXL 16 DVD-RAM
37. Burning Times Summary
38. Conclusion
For this test, each CD-R disc was burned to its maximum capacity and at its maximum speed. Then the same disc is read with the CDSpeed software, and the disc was scanned for digital errors (BLER, C1 and C2) with our system provided by Clover Systems. To simplify the presentation, we present the BLER, E31 and E32 error rates for each disc, which unveil the most serious errors on each disc.
Disc Info
Writing strategy - 16.08X Average
Writing time - 5:21 min
Although the drive recognized it as a 48X compatible disc, the burning process was done at 16X.
Reading strategy - 15.27X Average
Writing Quality - Clover Systems
Low E31 and zero E32 (uncorrectable) errors.
- About Clover Systems
The Clover Systems CDX Compact Disc Analyzer is a tool to quantitatively measure the quality of a CD. It will analyze CD-DA, CD-ROM, CD-ROM XA, CD-I, CD-R, Photo-CD, Enhanced CD and CD-RW discs at 4X, 8X, 24X, 32X or 40X speed. It effectively measures disc quality by examining the quantity and severity of CIRC errors generated during playback. It also provides the capability to measure signal parameters related to pit geometry, such as asymmetry and reflectivity. Together, all these bits of information provide a thorough analysis of disc quality. The Clover Systems Analyzers can also perform various format-checking tests on data discs, and do bit-for-bit data comparison on all types of CDs. All tests are carried out at the speed of 4X.
CIRC error correction uses two principles to detect and correct errors. The first is redundancy (extra information is added, which gives an extra chance to read the disc), and the second is interleaving (data is distributed over a relatively large physical area). The CIRC error correction used in CD players uses two stages of error correction, the well known C1 and C2, with de-interleaving of the data between the stages.
The error type E11 means one bad symbol was corrected in the C1 stage. E21means two bad symbols were corrected in the C1 stage. E31 means that there were three or more bad symbols at the C1 stage. This block is uncorrectable at the C1 stage, and is passed to the C2 stage. Respectively, E12 means one bad symbol was corrected in the C2 stage and E22 means two bad symbols were corrected in the C2 stage. E32 means that there were three or more bad symbols in one block at the C2 stage, and therefore this error is not correctable.
BLER (Block Error Rate) is defined as the number of data blocks per second that contain detectable errors, at the input of the C1 decoder. Since this is the most general measurement of the quality of a disc, you will find BLER graphs for all media tested below. If you click on the images you can see a more detailed table, indicating error levels. The Red Book specification (IEC 908) calls for a maximum BLER of 220 per second averaged over ten seconds. Discs with higher BLER are likely to produce uncorrectable errors. Al low BLER shows that the system as a whole is performing well, and the pit geometry is good. However, BLER only tells us how many errors were generated per second, and it does not tell us anything about the severity of those errors.
Review Pages
2. CD - DVD Reading
3. CD Error Correction
4. DVD Error Correction
5. Daxon CD-R
6. MMM&M CD-R
7. Taiyo Yuden CD-R
8. TDK CD-R
9. Verbatim CD-R
10. Verbatim CD-RW
11. The DaTARIUS DVD Analyzer R 2x
12. CMC MAG M01 000 (00) DVD+R
13. MAXELL 003 000 (00) DVD+R
14. DAXON AZ3 (000) DVD+R
15. MCC 003 DVD+R
16. RICOHJPN R03 004 (04) DVD+R
17. YUDEN000 T03 DVD+R
18. RITEK R04 DVD+R
19. CMC MAG AM3 DVD-R
20. DAXON016S DVD-R
21. CMC MAG AE1 DVD-R
22. OPTODISC R016 DVD-R
23. MCC 03RG20 DVD-R
24. RITEK F1 DVD-R
25. TTH02 DVD-R
26. MKM 01RD30 DVD-R DL
27. MKM 03 RD30 DVD-R DL
28. RITEK S04 001 DVD+R DL
29. MKM 003 (000) DVD+R DL
30. MKM 01RW6X01 DVD-RW
31. RITEKW06 DVD-RW
32. RITEKW04 DVD-RW
33. MKM A03 DVD+RW
34. RICOHJPN W21 DVD+RW
35. INFODISC A10 001 DVD+RW
36. MXL 16 DVD-RAM
37. Burning Times Summary
38. Conclusion