DVD Error Correction Tests

In the following tests we examined the DVD reading capabilities of the TEAC drive with scratched / defective DVD media. For the tests we used CDVD Benchmark and Nero CDSpeed. The reference test media come from ALMEDIO.

- Single Layer media

ABEX TDR-821

This is a single sided, single layer DVD-ROM with a 4.7GB capacity, and its surface has an artificial scratch of dimensions varying from 0.4 to 3.0 mm. The following transfer rate picture comes from the CDVD Benchmark v1.21 transfer rate test.

The resultant output is smooth and relatively clean. The TEAC drive did note return any read errors, reading was accurate and the final speed was 12x.

ABEX TDR-825

This is also a single sided, single layer DVD-ROM with 4.7GB capacity. The data structure of the disc is exactly the same as that of the TDR-821, with the difference that there are no scratches on the surface and instead defective areas ranging in dimensions from 0.5 to 1.1 mm. There are also fingerprints with height between 65 and 75 micrometers.

Here again we have a very smooth graph with no errors, and the drive passes over both areas containing scratches and fingerprints, without any problems. the TEAC drive proves so far to be a very good DVD reader. The test was finished succesfully and the reading speed was 12x CAV.

- Dual Layer media

ABEX TDR-841

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

The TEAC DV-W58G once again performed extremely well and managed to finish this defective surface test without posting any errors. Each layer of the disc reached a maximum reading speed of over 8x CAV.

ABEX TDR-845

This disc is a single sided, dual layer DVD-ROM disc with capacity of 8.5GB. The only difference between the TDR-845 and the TDR-841 is that the first includes both defective areas and fingerprints. The dimensions of the defective areas range from 0.5 to 1.1 mm and the fingerprints have height sized from 65 to 75 microns (micrometres).

So far, the drive has performed brilliantly and seems to be an excellent DVD reader with defective media.

ABEX TDV-541

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

The average reading speed was 6.33x while the speed at the end of the first layer reached 8.46x. Also, NeroCDSpeed reports low seek times for the disc. There is a slight glitch just after the switch over to the second layer, but the drive seems to recover quickly.

ABEX TDV-545

The TDV-545 disc is based on the TDV-540 series. It is a single sided, dual layer Video/S-2 disc with a capacity of 8.5GB. The TDV-545 includes artificial black dots on the disc's surface, sized from 0.4 to 1.0 mm. It also has 65 - 75 micrometre high fingerprints.

This test disc also proved not to be a problem. The reading strategy was CAV, while the maximum speed reached at the end of the first layer was 8.40x.