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Home > Hardware Reviews > Optical Storage

Thursday, December 21, 2006
LITE-ON BD B LH-2B1S Blu-Ray Drive

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

For this test we could not perform the usual ripping task through the EAC software suite, since the CD ripping task would require some hours, and it would most probably not finish at all. The LiteOn LH-2B1S slowed down reading at 0.2X as soon as it reached the audio tracks that were placed in the "scratched" areas of the disc. Such a behavior could turn out to be of a profit for the end-users, since the drive would slow down reading in order to correctly read/rip their damaged disc. In our case, the drive read the contents of the demanding ABEX TCD-721R audio CD, as you can see in the corresponding CDSpeed test:

- ABEX TCD-726

Errors total Num: 0
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)

On the other hand, the drive ripped the ABEX TCD-726 test disc accurately. A perfect score for the LiteOn drive, which seems to be ready to handle the specific disc defects, which are artificial black dots and fingerprints.

- 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
Plextor BD-R PX-B900A
5/5
5/5
5/5
5/5
0/5

The drive achieved flawless reading with the first 4 tracks. Playing the fifth track gave back audible sound interruptions and clicks.

- Summary

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




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