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Home > Hardware Reviews > Optical Storage

Wednesday, December 26, 2007
LITE-ON DVDRW-LH20A1L

3. CD Error Correction

In the following tests, we check the drive's behavior when reading scratched / defective audio discs. The test discs used were the ABEX series from ALMEDIO.

- ABEX TCD-721R

Errors total
Num : 750657
Errors (Loudness)
Num 39501
Avg : -73.3 dB(A)
Max : -23.0dB(A)
Error Muting
Num : 2509
Avg : 1 Samples
Max : 9 Samples
Skips
Num 0
Avg : 0.0 Samples
Max : 0 Samples
Total Test Result
77.2 points (of 100.0 maximum)

A good score from the LiteOn drive. Total error count is low and there are no skipped samples.

- ABEX TCD-726

Errors total
Num : 0
Errors (Loudness)
Num : 0
Avg : -174 dB(A)
Max : -174dB(A)
Error Muting
Num : 0
Avg : 0.0 Samples
Max : 0 Samples
Skips
Num : 0
Avg : 0.0 Samples
Max : 0 Samples
Total Test Result
100.0 points (of 100.0 maximum)

- CD-Check Audio Test Disc

The CD-Check Test Disc is another tool for evaluating the Sound Reproduction / Error correction capabilities of a CD player. The disc offers a signal combination with disc error patterns to rate the drive's abilities to read music and reproduce it completely. Five tracks on the disc contain a sequence of progressively more difficult tests. These tracks are referred to as Check Level-1 through Check Level-5.

The tracks are reproduced through a software multimedia player (e.g. Windows Media Player). Each level is considered as passed, if the tone is smooth, continuous without interruptions, skipping or looping. The higher the Check Level passed, the more reliable the sound reproduction of the tested drive.

Error Level
1
2
3
4
5
LH-20A1S
5/5
5/5
5/5
0/5
0/5

The drive managed to correctly play the first three tracks. Problems occurred with the fourth and fifth tracks. An average performance from the LH-20A1L in this test.

Overall, the drive is probably slightly above average when reading defective CDs.




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