Philips JackRabbit4 DVD+RW recorder - Page 4

DVD reading tests

- Single Layer DVD-ROM (Click for CDSpeed results)

In the DVD single layer read test, the Philips drive is faster than the Pioneer. The drive started the test at 4.91x and finished it at 11.21x with an average speed of 8.96x, while Pioneer had, for the same tasks, 3.38x, 8.16x and 6.07x respctively. The manufacturer's specifications for 8x DVD-ROM reading is confirmed, from the 8.96x average speed that the Philips drive shows in this test.

As in the CDR test, the same problem with the seek times measurements were faced here. For this reason we present the access times instead of seek times. The values we measured appear to be good.

- Dual Layer PTP DVD-ROM (Click for CDSpeed results)

The two layers of a PTP DVD-ROM disc are read sequentially with the drive starting the read process from the inner tracks on the disc, which is the beginning of each layer, and progressing outwards towards to the outer tracks for each layer.

Once again, the Philips JR4DVDRW was faster than the Pioneer DVR-SK12D. As we can see from the graph above the difference was at least 1x faster for Philips each time.

In comparison with the single layer disc, in the previous test, the access times are slightly increased. We consider that the 243 ms value for full access should be better.

- Dual Layer OTP DVD-ROM

The first layer of an OTP dual layer DVD-ROM is read exactly the same way as the first layer of the PTP disc we tested previously. The difference here is the reading strategy of the second layer on the disc. The beginning of the second layer is located in the outer part of the disc, so the drive starts reading from the outer tracks inwards towards the inner tracks of the disc.

As is usual with most drives, the first layer was read almost flawlessly with only a slight glitch near the end. The second layer was also read relatively smoothly and the resultant output is an almost symmetric graph.

- DVD Ripping Tests

We measured the DVD-Video ripping speed of the Philips JR4DVDRW using the latest version of DVD Decrypter software. The DVD Video title was the "Matrix" pressed DVD-Video.

The drive ripped the DVD movie files to our hard disk at a tranfer rate of 8165 KB/s average. The performance is very good, with the transfer speed being almost double that of the Pioneer drive.

- DVD Recordable / Rewritable reading Tests

The chart below shows the Nero CDSpeed results with the following media:

• 8x DVD+R
• 4x DVD+RW
• 4x DVD-R
• 2x DVD-RW

You will notice from the graph above that no matter what the media format, the Philips drive performed fast, producing more that double the speed of the Pioneer in all cases.