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

Thursday, August 12, 2004
Pioneer DVR-108

3. CD Error Correction Tests

Pioneer DVR-108 DL Recorder - Page 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

Errors total
Num: 1219671
Errors (Loudness) dB(A)
Num: 54764
Avg: -73.2 dB(A)
Max: -9.6 dB(A)
Error Muting Samples
Num: 3909
Avg: 1.6 Samples
Max: 1101 Samples
Skips Samples
Num: 2
Avg: 30 Samples
Max: 30 Samples
Total Test Result
67.8 points (out of 100.0 maximum)
C2 Accuracy
-

The performance with the 721R test disc is about average. The drive reached a very high -9.6 dB(A) Error Loudness level and also skipped samples. The drive cannot return C2 error pointers, so there's no C2 Accuracy score.

- ABEX TCD-726

Errors total
Num: 749
Errors (Loudness) dB(A)
Num: 36
Avg: -68.4 dB(A)
Max: -57.1 dB(A)
Error Muting Samples
Num: 0
Avg: 0.0 Samples
Max: 0 Samples
Skips Samples
Num: 0
Avg: 0.0 Samples
Max: 0 Samples
Total Test Result
92.2 points (out of 100.0 maximum)
C2 Accuracy
-

The Abex TCD-726 test disc is much easier for drives in general to read. The Pioneer DVR-108 drive reached 92.2 score (out of 100), a good score.

- 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
Pioneer A08
5/5
5/5
5/5
5/5
1/5

The drive showed a good ability to correct errors and reached the 5th level where it managed one out of five.




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