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Home > Hardware Reviews > Optical Storage > 48x CD-RW

Thursday, December 05, 2002
TEAC CD-W548E CD-RW

3. CD Error Correction Tests

TEAC CD-W548E IDE CD-RW - Page 3

Error Correction Tests

In the following tests we examine the reading error correction capabilities of the drive.

- EAC CD-R Test Disc

- Test Results (Max Reading)

Errors total
Num: 3130389
Errors (Loudness) dB(A)
Num: 15631
Avg:-21.8 dB(A)
Max: -6.2 dB(A)
Error Muting Samples
Num:1881
Avg:774.3 Samples
Max:3584 Samples
Skips Samples
Num: 2
Avg: 408 Samples
Max:408 Samples
Total Test Result
59.7 points (of 100.0 maximum)

The average level of errors is high and mainly produced from the scratched areas of the test disc. Many samples were also muted, and it seems that the most of them were long enough. The performance is low and the score is evaluated to 59.7 points out of 100.

- ABEX TCD-721R

- Test Results (Max speed)

Errors total
Num: 20918090
Errors (Loudness) dB(A)
Num: 144656
Avg:-42.0 dB(A)
Max: -5.7 dB(A)
Error Muting Samples
Num: 34620
Avg: 92.6 Samples
Max: 3584 Samples
Skips Samples
Num: 52
Avg: 81.8 Samples
Max: 1129 Samples
Total Test Result
52.7 points (of 100.0 maximum)

The ABEX 721R test disc is very hard for many drives and the Teac W548E doesn't seem to be an exception. The amount of total errors is higher than in the previous test, and the average level is -42 dB(A). But the main problem seems to be the error muting samples that are present in a high amount among with some skip samples. The performance is very low and the total score is only 52.7 points out of 100.

- ABEX TCD-726

- Test Results (Max Speed)

Errors total
Num: 0
Errors (Loudness) dB(A)
Num: 90
Avg:-29.3 dB(A)
Max: -17.9 dB(A)
Error Muting Samples
Num: 0
Avg: 0 Samples
Max: 0 Samples
Skips Samples
Num:1 0
Avg: 326.4 Samples
Max: 468 Samples
Total Test Result
75.9 points (of 100.0 maximum)

The ABEX 726 test disc was easier for the TEAC drive to read. There were less errors loudness and some skip samples. The overall score is 75.9 points.

- Conclusion

Test Disc
Reading Speed
TEAC CD-W548E
Score
EAC CD-R
Max
59.7
ABEX TCD-721R
Max
52.7
ABEX TCD-726
Max
75.9
Average Score
62.3

TEAC W548E did not showed the accuracy we expected in these tests. The average score is less than average and hardly reaches the 62.3 points out of 100.

- C2 Information accuracy

- Test Results (MAX Speed)

Below is the CDSpeed DAE quality test result of Teac W548E. As you can see, there were many unreadable areas and many compare errors. The drive looses control and produces many sync error after a specific scratch width. The quality score cannot be -5 as the software indicates, but is certainly low. The C2 accuracy is also very low, reaching the 41.24% only.

The C2 accuracy of the Teac W548E seems to be very low. The ABEX 726 test did not gave a C2 accuracy result, since no errors were returned. The overall accuracy score is only 52.1%. Both results from CDSpeed and EAC software show a similar behaviour for the drive.

Test Disc
Reading Speed
TEAC CD-W548E
Score
EAC CD-R
Max
51.00
ABEX TCD-721R
Max
53.2
ABEX TCD-726
Max
-
Average Score
52.1

Below are the C2 error graphs as produced by EAC analyser software...




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