TDK
880N DVD±RW
recorder -
Page 3
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:
3143574
|
Errors
(Loudness) dB(A)
|
Num:
139529 |
Avg:
-74.3 dB(A) |
Max:
-18.7 dB(A) |
Error
Muting Samples
|
Num:
9506 |
Avg:
1.0 Samples |
Max:
28 Samples |
Skips
Samples
|
Num:
12 |
Avg:
6.0 Samples |
Max:
0 Samples |
Total
Test Result |
66.1
points (out of 100.0 maximum) |

The performance with this disc was not very good. The total error
count was high, and the maximum level of the loudness errors reported
will probably mean audible "clicks" in playback. The total score could be
better. In addition, many samples were muted.
- ABEX TCD-726

Errors total
|
Num:
108
|
Errors (Loudness) dB(A)
|
Num:
4 |
Avg:
-96.1 dB(A) |
Max:
-89.2 dB(A) |
Error Muting Samples
|
Num:
2 |
Avg:
40.0 Samples |
Max:
40 Samples |
Skips Samples
|
Num:
0 |
Avg:
0.0 Samples |
Max:
0 Samples |
Total Test Result
|
89.7
points (out of 100.0 maximum) |

The Abex TCD-726 test disc is much easier for drives in general to read. That's
why TDK performed better than with the previous CD. The total error count was
not high, while there no skips and
only two mutes. The total score of 89.7 out of 100 is good.
- 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
|
TDK 880N
|
5/5
|
5/5
|
0/5
|
0/5
|
0/5
|
The drive once again performed very poorly. It managed to playback only the
first two levels out of five. We expected to play successfully at least
the first four levels.
- Summary
Test Disc
|
Reading Speed
|
Score
|
ABEX TCD-721R
|
Max
|
66.1
|
ABEX TCD-726
|
89.7
|
Average Score
|
77.9
|
The total score of the drive is not too low. However the CD error correction
of the TDK 880N is not something to be proud of.