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

Tuesday, May 02, 2006
Pioneer DVR-111

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

Errors total Num: 1068752
Errors (Loudness) dB(A) Num: 53596 Avg: -73.6 dB(A) Max: -34.9 dB(A)
Error Muting Samples Num: 3411 Avg: 1.1 Samples Max: 40 Samples
Skips Samples Num: 0 Avg: 0.0 Samples Max: 0 Samples
Total Test Result 76.6 points (out of 100.0 maximum)

Pioneer produced very satisfactory results in this test. The total error count is about average, while the Maximum Error loudness is close to being within the acceptable limits. There were no skipped samples reported and the overall test score of 76.6 points out of 100 is very good.

- ABEX TCD-726

Errors total Num: 763
Errors (Loudness) dB(A) Num: 48 Avg: -65.5 dB(A) Max: -58.2 dB(A)
Error Muting Samples Num: 1 Avg: 1.0 Samples Max: 1 Samples
Skips Samples Num: 0 Avg: 0.0 Samples Max: 0 Samples
Total Test Result 91.9 points (out of 100.0 maximum)

This is a much easier test disk than the previous one and most of the latest generation drives pass this test with a perfect score. Not so the Pioneer drive though. The total test result score of 91.9 out of 100 is still good though.

 

- 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
Pioneer DVR-111 5/5 5/5 5/5 5/5 1/5

The DVR-111 reached the fifth level and produced audible clicks. This is better than average performance.

- Summary

Overall, the drive has a very good CD error correction mechanism.




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