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Home > Hardware Reviews > Optical Storage

Saturday, March 24, 2007
LITE-ON DVDRW SH-16A7S

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: 1306052
Errors (Loudness) Num:46269 Avg: -71.3 dB(A) Max: -11.7 dB(A)
Error Muting Samples Num:3848 Avg: 1.0 Samples Max: 7 Samples
Skips Samples Num: 0 Avg: 0.0 Samples Max: 0 Samples
Total Test Result 76.7 points (of 100.0 maximum)

This is average performance with the specific disc from the LiteOn drive .

- ABEX TCD-726

Errors total Num: 585
Errors (Loudness) dB(A) Num:42 Avg: -55.6 dB(A) Max :-19.8 dB(A)
Error Muting Samples Num: 4 Avg: 1.0 Samples Max: 1 Samples
Skips Samples Num: 2 Avg: 234.0 Samples Max: 234 Samples
Total Test Result 78.6 points (out of 100.0 maximum)

The LiteOn drive produces errors quite early, revealing either problems in the optics or the error correction implementation. Some of the spikes are quite high, which means that unwanted noise or clicks may reach the speakers of a sound system when you playback this audio disc.

The performance in this test is not as good as it should be, since competitive drives in the main, do not produce any errors at all in the specific test.

- 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 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
LiteOn LH-20A1P
5/5
5/5
5/5
0/5
0/5

The drive achieved flawless reading with the first 3 tracks. Playing the fourth and fifth track produced audible sound interruptions and clicks.

- Summary

Overall, the drive appears to have average CD Error correction capabilities.




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