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

Monday, February 20, 2006
Samsung SH-W163A

3. CD Error Correction

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: 951004
Errors (Loudness) dB(A) Num: 50538 Avg: -73.8 dB(A) Max: -36.0 dB(A)
Error Muting Samples Num: 3072 Avg: 1.0 Samples Max: 8 Samples
Skips Samples Num: 0 Avg: 0.0 Samples Max: 0 Samples
Total Test Result 76.8 points (of 100.0 maximum)
C2 Accuracy 99.7 %

With a low total error count, no skipped samples and low muting samples count, the drive's error correction mechanism seems to be up to the task in this CD error correction test.

- ABEX TCD-726

Errors total Num: 00
Errors (Loudness) dB(A) Num: 0 Avg: 0 Max: 0
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 points (of 100.0 maximum)
C2 Accuracy 100 %

With 100 points total, we have a flawless reading of this error correction test disc.

- 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
Samsung SH-W163
5/5
5/5
4/5
0/5
0/5

The drive passed only the first three Check Levels of the test (actually, only the first two with 4 out of 5 in the 5th). The results indicate average performance with the specific test disc. 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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