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Home > Hardware Reviews > Optical Storage > CD-RW External

Monday, April 14, 2003
Philips JR32RWDV

3. CD Error Correction Tests

Philips JackRabbit32 CD-RW/DVD drive - Page 3

Error Correction Tests

In the following tests we examine the error correction capabilities of the Philips JR32RWDV while reading an artificially defected recorded CD.

- EAC CD-R Test Disc

- Test Results (Max Reading)

The drive starts reporting errors at 8mins. The errors within the black triangle defect, reached -23dB in specific areas. The five scratches also produced errors and the signal/noise level was higher than -18dB(A). The score is of 52.8 out of 100 (max), which is a low performance compared to other drives.

Errors total
Num: 115251240
Errors (Loudness) dB(A)
Num: 581862
Avg: -29.0 dB(A)
Max: -7.2 dB(A)
Error Muting Samples
Num: 76652
Avg: 1.0 Samples
Max: 622 Samples
Skips Samples
Num: 353
Avg: 44.2 Samples
Max: 2934 Samples
Total Test Result
52.8 points (of 100.0 maximum)

- ABEX TCD-721R

- Test Results (Max speed)

Errors total
Num: 1221100
Errors (Loudness) dB(A)
Num: 63415
Avg: -59.5 dB(A)
Max: -11.3 dB(A)
Error Muting Samples
Num: 5602
Avg: 1.6 Samples
Max: 1211 Samples
Skips Samples
Num: 2
Avg: 4.0 Samples
Max: 4 Samples
Total Test Result
71.6 points (of 100.0 maximum)

The score for Philips JR32RWDV is 71.6, which is an average performance. The total errors occurred are less than those in the previous test, but the muted samples were less. The drive also gave only 2 skip samples.

- ABEX TCD-726

- Test Results (Max Speed)

The drive gave a very high score of 83.1 points out of 100. Only 4 loudness errors occurred and their level is low, -86.2dB(A) on average. The only skip sample had a length of 257 samples.

Errors total
Num: 0
Errors (Loudness) dB(A)
Num: 4
Avg: -86.2 dB(A)
Max: -84.9 dB(A)
Error Muting Samples
Num: 0
Avg: 0.0 Samples
Max: 0 Samples
Skips Samples
Num: 1
Avg: 257.0 Samples
Max: 257 Samples
Total Test Result
83.1 points (of 100.0 maximum)

- Conclusion

Test Disc
Reading Speed
Score
EAC CD-R
Max
52.8
ABEX TCD-721R
71.6
ABEX TCD-726
83.1
Average Score
69.16

The Philips JR32RWDV gets an average score of 69.16 out of 100 in the reading error correction tests. As we have mentioned in previews hardware tests, the EAC tests give a general idea of the behavior of a drive with respect to error correction of defected data discs. An average score should not discourage users for using the specific drive, since it is very hard to achieve 100% success in these tests . However, there were drives that gave better results than the JR32RWDV, mostly IDE ones, thus Philips could definitely work on improving this performance by providing improved error handling on firmware updates.

- C2 Information accuracy

- Test Results (MAX Speed)

The drive cannot retrieve any C2 error information, according to EAC. As a result, the amount of C2 missed equals to the errors occurring when comparing with respect to the original .wav. No sync errors occurred, resulting to an average quality score of 86.2 points.




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