Summary of transverse evaluation of 32 DVD burning discs
Source: Computer News
When you can buy 399 yuan DVD dual burner and 1.5 yuan DVD, we can say for sure that the era of DVD burning has begun.
However, there are some disharmonies in this popular DVD burning trend-there are many brands of DVD burning discs, but the quality is uneven. The key is that the prices vary greatly. High-priced dishes may not be of high quality-this is the most troublesome problem. On the contrary, there is "gold" in low-priced CDs-this is what DVD burning enthusiasts often do and talk about the most. Computer newspaper evaluation laboratory specially launched this large-scale horizontal evaluation of DVD recording quality. The test objects are mainstream 4×/8× DVD+R and DVD-R discs. I hope that the majority of DVD "burning friends" can understand the current situation of DVD burning discs on the market through this evaluation, and at the same time, they can choose their favorite "golden" discs.
DVD burning disc market:
The chaotic flowers gradually confused the eyes.
Now the price of DVD burning discs has plummeted. Three months ago, a 4× DVD+R or DVD-R film in the mainland market needed 4 ~ 6 yuan, but now, it only needs 2 ~ 4 yuan, and there are even some unlabeled white discs, and the price is only 1.5 yuan/piece. Even for boxed 4x4 discs, the price is only 8 ~ 12 yuan each. 8× DVD+R or DVD-R film, the unit price is only 3.5 ~ 8 yuan.
The price of DVD burning discs is civilian, which is of course very attractive. However, it is often said that more choices are not necessarily a good thing. If you go to a computer store, you will find that there are so many brands of DVD burning discs, especially DVD+R and DVD-R discs that you don't know how to choose. A first-and second-tier city usually has about 40 brands/varieties, and the brand repetition of each city is not high. Generally speaking, there are more than 100 brands/varieties of DVD burning discs in China, and they are still expanding.
Teach you a trick:
Manufacturer information view
Faced with so many brands, consumers really feel at a loss, which is also the main reason why we launched this evaluation. Here's a trick to teach you first: check the manufacturer information of the disc. Through this information, we can make a preliminary judgment on the quality of the CD.
The quickest way to query the manufacturer information of CD is to use corresponding software, such as DVDINFOPro and DVD Identifier. Here, I recommend you to use DVD Identifier, which is a DVD disc information identification software that can continuously upgrade the database through the network. Through it, we can check the manufacturer ID, manufacturer name, media type ID and other information of DVD burning discs.
According to the information of Fuji 4XDVD+R disc displayed in DVD recognizer, we can see that it emits light by itself.
▲ Hot: DVD identifier download address. com/soft com/soft/ 13830 . html
If you buy many brands/types of discs, you will find some interesting phenomena. For example, many DVD+R films in the market are from manufacturers/production lines with media type ID 00 1 (of course, this "00 1" is not just a manufacturer or a production line), which actually reflects the pattern of DVD market from one side: there are many brands/types, but the number of factories/production lines is relatively small. So we can find out the rules and find our favorite manufacturers and brands.
The safest way to buy:
Quality inspection
Note: If you are not familiar with the knowledge of quality inspection of DVD burning discs, you must read this section, otherwise it will affect your understanding of the full text.
In front of us, we introduced the method of judging the quality of DVD by viewing the manufacturer information of DVD with software, and also told you some manufacturers/brands with better quality. Strictly speaking, however, even the products of big manufacturers are graded, and the quality of similar products varies with the media type ID. The situation of ordinary parts in the market is more complicated. For example, the disc with the code "00 1" is not a product of one production line in one place, so the actual collocation and quality of dyes are not exactly the same, even the material and technology of the base are different. So the code is "00 1", but the quality of the discs is mixed, and the price varies greatly according to the final brand. Some only sell one from 3 yuan, and some as high as one from 8 yuan. We can't judge the quality of these discs only from the manufacturer's information. If you want to judge which discs are good and which are not, the safest way is to do quality inspection of discs.
Quality of DVD burning disc and PI/PIF test
From the application level, the method of judging the quality of DVD burning discs is similar to the method of testing the quality of DVD burner, which can be said to be the same: the same burner, a large number of discs, is to test the quality of discs; A large number of burners and a fixed disc can reflect the recording quality of different burners.
At present, the quality of DVD recording can be measured by FE/TE (focusing error/tracking error), jitter, TA and other tests. However, these methods are somewhat theoretical and idealistic and not intuitive enough. A DVD burner with good quality means good lettering! Good reading! Therefore, a qualified DVD burner must first be able to burn successfully. If it fails, the quality will be out of the question. Next, it is reading. The application of DVD is mainly reading. Therefore, after recording, the fluency of reading becomes the standard to judge the quality of DVD recording. PI/PIF detection must be introduced here.
Basic knowledge of PI/PIF
When data is saved to a DVD disc, the data in the disc will be saved as a block. Each block consists of original data and corresponding check codes. Because of the existence of check code, we also call this kind of data block ECC block, or ECCB for short.
In the DVD recording specification, it is defined that "if there is one byte or more error in a line of ECCB, it is called PI error", which is also called PI error, PIE or PI.
"When the error in a line after PI error correction is still more than 5 bytes, it is called PI- uncorrectable", and PI- uncorrectable is called PIF(PI Failure) in many softwares.
In the process of reading optical disc by optical drive, if PIF appears, it will be handled by PO verification mechanism. If PO recovery fails, ECCB will not be able to read normally. Therefore, in the quality test of DVD recording disc, we require the PO value to be 0.
▲ HOT: For the detailed analysis and illustration of DVD data structure, please refer to the evaluation of Computer Newspaper, No.32, 2004 and the level measurement of DVD burner in the market version.
Quality inspection of CD-DVD speed
In order to make the burned CD read smoothly, the burning quality must be guaranteed. Therefore, the DVD recording specification stipulates the recording quality as follows: the error of ECCB PI for 8 consecutive times cannot exceed 280; PI- uncorrectable (PIF) in ECCB cannot exceed 4. We would like to remind you that in the absence of PO, a PI value greater than 280 and a PIF greater than 4 does not mean that the CD cannot be read normally, but only that the quality of the CD is not ideal.
Nero's CD-DVD Speed provides the quality inspection function of DVD discs. The indicators of this test are also PI and PIF, and the indicator it follows is 280/4. The lower the PI/PIF value, the better the optical disc quality.
It is worth noting that CD-DVD Speed also provides the display of recording quality score, but this score is not very strict, because it mainly depends on the PIF value, especially when the instantaneous PIF is too high, the quality score will drop to 0. But in fact, the instantaneous PIF value is too high, which usually does not affect the smooth reading of optical discs. So this quality score can only be used as a reference. Important data are maximum PI value, average PI value, maximum PIF value and average PIF value.
Brief introduction of evaluation scheme
After knowing the knowledge of PI/PIF inspection, we can check the quality of the CD. If you don't have the energy and money to collect so many discs, then you must not miss our evaluation.
test platform
CPU:P4 2.8E GHz
Motherboard: UNIKA i848P(UP48PN)
Graphics card: NVIDIA GeForce FX5700LE
Memory: 5 12MB regal DDR400.
Hard disk: Seagate 80GB
System: Chinese Windows XP+SP 1
Test software: Nero CD-DVD speed 3.42, DVD identifier.
Auxiliary test software: Nero CD-DVD Speed 3. 10 (for data accident detection)
Optical disc burning drive:1.lggsa-4082b2.plextor px-716a.
Optical disc reading drive: BTC DRW 1 108IM
Test description: Because the evaluation objects are 4×/8× DVD+R and DVD-R discs, and they must be burned at the nominal speed strictly (that is, the nominal 4× disc must be burned at 4×, and it is not allowed to burn at an overspeed or a deceleration), we chose the dual 8× DVD dual burner GSA-4082B as the main burning platform. At present, there is no DVD burner that can handle all the discs at the nominal speed, so if the discs of GSA-4082B can't pass smoothly (for example, 4× can only be burned by 2×), PX-7 16A will be used to burn them to ensure the nominal speed. If the disc can be over-engraved, the speed is limited. Use CD-DVD Speed's "Create Data Disc" function to burn, which is an actual burning rather than a simulated burning, and it will fill the burning disc with 5000 files of different sizes. During the recording process, disks that have failed for three consecutive times will be withdrawn from the evaluation.
After the recording is completed, take the DRW 1 108IM of BTC as the reading platform, and use CD-DVD speed version 3.42 for PI/PIF detection, with a unified test speed of 6×. In the PI/PIF test, discs that report errors twice in a row will also be withdrawn from the evaluation.
Special note: The lower the values of PI and PIF, the better the quality of the disc.
Optical disc evaluation
Disc evaluation is divided into DVD+R and DVD-R.
Due to the limited space, we can't put the PI/PIF test chart of each CD in the newspaper, only the PI/PIF test chart of the recommended CD. If you need the PI/PIF details of all the tested products, please go to bbs.cpcw.com's "Computer Newspaper Resource Library" and Computer Newspaper Forum.
It is recommended to buy. ※.
Mitsubishi 8×DVD+R boxed
Digital 8×DVD+R boxed
Color Leopard A+ Class 4×DVD+R
PioData 8×DVD-R
Tieliko 4×DVD-R boxed
Tsinghua Tongfang 4x DVD-R
Clone 4×DVD-R
Color Leopard A Class 4×DVD-R
Reminder: the batch of discs changes quickly, so be careful when buying.
DVD+R disc
(Only the single introduction of Tsinghua Tongfang is summarized, and others are omitted).
Tsinghua Tongfang 4×
Manufacturer ID: not applicable
Name of manufacturer: Not applicable
Media type ID:00 1
Maximum pi: 25; Average pi: 4.73
Maximum pif:13; Average PIF: 0.3 1
Reference price: 8 yuan/piece.
Tsinghua Tongfang's DVD burning discs seem to be listed in thunis at the same time, and the price is the same (I don't know if you got a cheaper price), but the quality is good. In the whole data reading process, the PI value is quite stable, and it has been well maintained at around 10, but at the end, the PI value rises slightly. In addition, its PIF only exceeds 4 in two places, and most PIF values are less than 3.
Comprehensive test data sheet (select some brands)
CD brand Tsinghua Tongfang 4X Tieli 4X "Sony" 4X Ziguang 4X unmarked white CD 4X
Manufacturer ID Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable
Manufacturer's Name Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable
Media type id 001001001001
The maximum PI value is 25 103 276 532 128.
The average PI value is 4.73 8.20135.69 47.49 44.93.
Maximum PIF value 13 13 9 29 35
The average PIF value is 0.31.120.751.151.25.
Purchase Order Value 0 0 0 0 0 0 0
Single chip reference price 8 yuan 8 yuan 3 yuan 8 yuan 1.5 yuan
Special note: The lower the values of PI and PIF, the better the quality of the disc.
DVD-R disc
Tsinghua Tongfang 4X
Manufacturer ID:SKC
Name of manufacturer: SKC
Maximum pi: 38; Average pi: 4.74
Maximum PIF:2, average PIF:0.04.
Reference price: 8 yuan/piece.
This Tsinghua Tongfang 4X DVD-R from SKC can be said to be the "dark horse" in this cross test. Its PI error control is better and PIF control is better. The total number is less than 1000, and there are only two at most. This also earned it a high quality score of 95 points. I recommend it to everyone here, hoping to reduce the price as soon as possible.
DVD-R disc test data sheet
Disc brand Tsinghua Tongfang 4X Fuji 4X (box) Melody 4X (box) Tielike 4X (box) Label-free white disc 4X
Manufacturer id skctyg01gsc002vdsmsab01an31
Name of manufacturer SKC Solar Photovoltaic Power Generation Co., Ltd. Anweier Precision Technology Co., Ltd.
Media Type ID Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable
The maximum PI value is 38 35137100172.
The average PI value is 4.741.4619.142.2519.80.
Maximum PIF value 2 17 20 28 7
The average PIF value is 0.04 0.02 0.04 0.08 0. 16.
Purchase Order Value 0 0 0 0 0 0 0
Single chip reference price 8 yuan 12 yuan, 9 yuan, 8 yuan 1.5 yuan.
Special note: The lower the values of PI and PIF, the better the quality of the disc.
label
Through this evaluation, it can be found that most of the 4×/8× DVD R burned discs on the market at present have no problem in use, but there are great differences in quality, especially in DVD+R, and the product quality of Japanese manufacturers such as Mitsubishi, Taiyou and Ricoh is the most guaranteed. If we only consider quality and stability, we can consider their original products, but the price is relatively expensive. The quality of other DVD+R discs is mixed, even the "00 1" series. Among them, TILIKE, PDK, Tsinghua Tongfang, Caibao A+ and A-series DVD+R discs are relatively superior in quality. If you want to pursue cost performance, you can choose these brands. We can also choose films from big manufacturers in the industry (for example, Mitsubishi's 8×DVD+R films, the price is 8 ~ 10 yuan/film), or discs from other brands in their factory (for example, the number of 8×DVD+R is more). As for DVD-R, due to its early development, there are relatively many manufacturers with dyes and production technology, and the quality of most discs is still remarkable, and the quality of some brands is not even inferior to that of Japanese manufacturers. And there are many "gold" in DVD-R, such as 4×DVD-R of clone, 4×DVD-R of Caibao and 8×DVD-R of PioData. If boxed boxes are needed and the price is not too expensive, brands such as Tielike are the best choice. Of course, there are also some design problems in DVD-R discs, such as COMO, which is too thin and very soft. Although HAPPY looks beautiful, many recorders can't burn normally.
Because recording and quality inspection need a lot of time, and there are many discs, and some of them have been tested more than once, the total time spent in this horizontal test is about 200 hours, and the investment in purchase is also quite huge. But I believe it is very helpful to everyone. In fact, we haven't collected all the dishes from all the manufacturers/production lines in the market (because there are too many brands, as mentioned at the beginning of the article), and there are also products from manufacturers/production lines such as BeAll, OCTOPLUS, OPTODISC, Princo, Prodisc, Pitsexp, WFKA 1 1, POMSI, etc. More importantly, we hope that this horizontal test can inspire and guide consumers, and finally judge and identify the quality of DVD discs by themselves, so as to find "gold" easily.