Friday, September 21, 2018
Most Popular
Hardware Reviews
Optical Storage
WEB Reviews
Seagate Enterprise Capacity 3.5 V.3 4TB SAS 6Gb/s HDD Review
OCZ Vector 256GB SSD Review @ Custom PC Review
Gigabyte F2A85XM-D3H
NZXT Phantom 630
Auvio Bluetooth Portable Speaker Review
Corsair H90 CPU Cooler Review
BIOSTAR Hi-Fi Z77X (Intel Z77) Motherboard Review
Noctua NH-L9i Cooler Review on Technic3D
Breaking News
PlayStation Now Adds Downloading of PS4, PS2 Games
U.S. Music Industry Dominated by Streaming
Amazon Announces New Echo Devices, New Alexa Features
AR Headset Prevalence is Still a Few Years Out
Alibaba and Intel Cloud Deliver Joint Computing Platform for AI Inference at the Edge
GoPro Launches New Hero 7 Black, Silver and White Cameras
Xiaomi Launches the Mi 8 Lite And Mi 8 Pro Smartphones in China
Airbnb to Comply with European Commission Demands, Facebook and Twitter Need to Do More
Home > Hardware Reviews > Optical Storage > DVD Recorders Double Layer

Friday, September 24, 2004
NEC ND-3500A

3. CD Error Correction Tests

NEC ND-3500A 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.


Errors total
Num: 1457211
Errors (Loudness) dB(A)
Num: 173395 Avg: -80.4 dB(A) Max: -18.5 dB(A)
Error Muting Samples
Num: 5997 Avg: 1.2 Samples Max: 18 Samples
Skips Samples
Num: 36 Avg: 6.0 Samples Max: 6 Samples
Total Test Result
63.9 points (out of 100.0 maximum)
C2 Accuracy
98.6 %

The total error count was about average, and the maximum error loudness level was high at -18.5dB. There were 36 skipped samples which is high, while the drive achieved a total score of 65.4. In general, the drive 's performance was not that good with this test disc.

- ABEX TCD-726

Errors total
Num: 8438
Errors (Loudness) dB(A)
Num: 12262 Avg: -85.5 dB(A) Max: -11.5 dB(A)
Error Muting Samples
Num: 323 Avg: 4.4 Samples Max: 18 Samples
Skips Samples
Num: 2 Avg: 6.0 Samples Max: 6 Samples
Total Test Result
73.9 points (out of 100.0 maximum)
C2 Accuracy
96.3 %

The Abex TCD-726 test disc is much easier for drives in general to read. Most drives manage to compile a score in the 90s with the better drives managing 100. The drive managed only 73.9, showing again that the drive's CD error correction capabilities need improving. A good reader should produce better results than these.

- 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 (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
NEC ND-3500A

The drive successfully passed only the first two out of the five check levels for this test. Here too, the drive turned in a poor performance. Almost all drives have difficulties reading the 5th level but good quality drives can read up to the 4th level. However, most drives will pass at least the third level without any problems.

- Summary

Generally we can say that the CD error correction of the NEC ND-3500A is less than average, something that could be fixed with newer firmware releases.

Get RSS feed Easy Print E-Mail this Message

Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2018 - All rights reserved -
Privacy policy - Contact Us .