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Home > Hardware Reviews > Optical Storage > DVD Recorders Double Layer

Tuesday, February 08, 2005
LiteOn SOHW-1653S

3. CD Error Correction Tests

LiteOn SOHW-1653S DVD Burner

CD Error Correction Tests

In the following tests, we check the drive's behavior when it comes to reading scratched / defective discs. The test discs we use are the ABEX series from ALMEDIO.

- ABEX TCD-721R


Errors total
Num: 897874
Errors (Loudness) dB(A)
Num: 51003 Avg: -74.1 dB(A) Max: -19.7 dB(A)
Error Muting Samples
Num: 2891 Avg: 1.0 Samples Max: 11 Samples
Skips Samples
Num: 2 Avg: 558.0 Samples Max: 588 Samples
Total Test Result
62.7 points (out of 100.0 maximum)
C2 Accuracy
99.7 %

The total error count was low even though the maximum error loudness level was high at -19.7dB. Despite also having low loudness error and muted samples error counts, the drive managed to notch up skipped samples meaming it couldn't correct all errors. In general, the drive's performance was not that encouraging with this test disc.

- ABEX TCD-726



Errors total
Num:
Errors (Loudness) dB(A)
Num: 0
Avg: -174.0 dB(A)
Max: -174.0 dB(A)
Error Muting Samples
Num: 0
Avg: 0 Samples
Max: 0 Samples
Skips Samples
Num: 0
Avg: 0 Samples
Max: 0 Samples
Total Test Result
100.0 points (out of 100.0 maximum)

The behavior of drive was much better in this case where it managed to correct all the disc's errors. The result was a perfect 100.

- CD-Check Audio Test Disc

The CD-Check Test Disc is a very useful 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 ability to read music and reproduce it completely. Five tracks on the disc contain a sequence of progressively difficult tests. These tracks are referred as Check Level -1 through Check Level -5.

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

Error Level
1
2
3
4
5
LiteON SOHW-1653S
5/5
5/5
5/5
0/5
0/5

The drive passed the first three Check Levels of the test. The performance reveals average sound reproduction and error correction. The fourth and the fifth levels include an error size of 1.125mm and 1.500mm respectively, and the drive produced continuous audible clicks over those tracks.




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