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Home > Hardware Reviews > Optical Storage

Friday, January 16, 2009
LiteOn eSAU208

3. CD error correction tests

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

- ABEX TCD-721R

Errors total Num : 1408771
Errors (Loudness) 64939 -71,4dB(A) Max :-19,7dB(A)
Error Muting Num :6350 Avg : 1.2 Samples Max : 335 Samples
Skips Num : 5 Avg :331,2 Samples Max : 486 Samples
Total Test Result 60,9 points(of 100.0 maximum)
C2 accuracy 97,9 %

Not that much of a good score. There were some skipped samples and the maximum Errors Loudness level is too high, at -19,7 dB(A). There might be a few clicks and some small ammount of noise in the playback procedure of the specific media. There also many muted samples.

- ABEX TCD-726

Errors total Num 35
Errors (Loudness) Num :5 Avg : -77,4 dB(A) Max : -70,3 dB(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 94,0 points( of 100.0 maximum)
C2 accuracy 100%

Good performance here, successfully hiding and correcting most defected data.

- 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
Slimtype eSAU208
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. Average behavior here. Overall, the drive exhibited mediocre performance with our defective test discs.




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