DVD Error Correction Tests

Teac DV-W50D

In the following tests we examined the DVD error correction capabilities of the Teac DV-W50D drive. For the tests we used CDVD Benchmark v1.21 and Nero CDSpeed . The reference test media comes from ALMEDIO.

- Single Layer media

ABEX TDR-821

This is a single sided, single layer DVD-ROM with a 4.7GB capacity, in which there are scratches with dimensions from 0.4 to 3.0 mm. The following transfer rate picture comes from CDVD Benchmark v1.21 transfer rate test.

Teac DV-W50D managed to finish the reading test without encounter any problem. The drive read the scratched disc fast and at the end of the test the reported speed was 13X. So the upshot is a great ability.

ABEX TDR-825

This is also a single sided, single layer DVD-ROM with a 4.7GB capacity. The data structure of the disc is exactly the same as the TDR-821, with the difference that there not scratches on it but defected areas with dimensions from 0.5 to 1.1 mm. There also fingerprints sized from 65 to 75 micrometers.

Again the test was completed without any read errors. During the procedure the reading speed was reduced from 10X to 5X on the fingerprint defected area, but after that the speed resumed and the test was finished successfully.

- Dual Layer media

ABEX TDR-841

This is a 8.5GB dual layer, single sided DVD-ROM disc with artificial scratches with dimensions from 0.4 to 3.0mm, in both layers.

The reading procedure began with the speed of 3.5X. At the end of the first layer the drive lower the speed in order to read the disc, an unreasonable event because the specific area wasn't defective. Eventually the test was finished without any reported problems.

ABEX TDR-845

The disc is a single sided, dual layer DVD-ROM disc with a capacity of 8.5GB. The only difference between the TDR-845 and the TDR-841 is that the first includes defected areas and fingerprints. The dimensions of the defected areas are ranged from 0.5 to 1.1 mm and the fingerprints are sized from 65 to 75 micrometers.

During the test the drive attribute smoothly without difficulties achieving the speed of 8X at the end of each layer. The reading process started at 3.5X.

ABEX TDV-541

The TDV-541 is a single sided, dual layer DVD-VIDEO disc, with capacity of 8.5GB. The disc is based upon the TDV-540 series which is designed for inspection and adjustment of DVD-VIDEO players. The discs check the layer switch operation from layer 0 to layer 1 and also include test pictures and test signals for DVD sound files. The current TDV-541 checks also the error correction capabilities of the drive and includes scratches from 0.4 to 3.0 mm.

The reading process started at 3.5X. The speed at the end of the first layer was 8X. That means that the drive didn't need slow down to read the effected area, which bypass without any reported problems.

ABEX TDV-545

The TDV-545 disc is based on the TDV-540 series. It is a single sided, dual layer DVD-VIDEO disc with a capacity of 8.5GB. The TDV-545 includes artificial black dots on the data surface, sized from 0.4 to 1.0 mm. It has also 65 - 75 micro meters fingerprints.

Black dots and fingerprints were not a problem for the drive. The speed at the end of the first layer is at 8X while the reported average speed is 6.17X. The test finished without any read errors.