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Home > Hardware Reviews > Optical Storage > DVD External

Thursday, April 21, 2005
LG GSA-5160D

3. CD Error Correction Tests

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

Total erors
Num: 2374290
Errors (Loudness) dB(A)
Num: 125491
Avg: -76.4 dB(A)
Max: -22.5 dB(A)
Error Muting Samples
Num: 7417
Avg: 1.2 Samples
Max: 582 Samples
Skips Samples
Num: 0
Avg: 0 Samples
Max: 0 Samples
Total Test Result
74.8 points (out of 100.0 maximum)

The results are not very bad, nor good. The total error count is high and so is the total of the error muted samples. No samples were skipped.

- ABEX TCD-726

Errors total
Num: 62616
Errors (Loudness) dB(A)
Num: 8968
Avg: -84.7 dB(A)
Max: -46.1 dB(A)
Error Muting Samples
Num: 277
Avg: 1.0 Samples
Max: 3 Samples
Skips Samples
Num: 0
Avg: 0.0 Samples
Max: 0 Samples
Total Test Result
80.8 points (out of 100.0 maximum)

Most of the drives in the market would give a perfromance that ranges from acceptable to excellent with the 726 test disc. Though this is not the case here, the LG did relatively good , reporting an average error total.

- 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 being reproduced through a software multimedia player (i.e. 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
LG GSA-5160D
5/5
5/5
3/5
0/5
0/5

The drive successfully passed only the first two out of the five check levels for this test. This is a rather poor performance. Usually, all drives have difficulties reading the 5th level, and a good drive can read 4th level. But most drives will pass the third level without any problem.

- Summary

The CD error correction capabilities of the drive are just below average and should be improved by LG.




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