What are the Different Types of Piracy?

Pirated discs are a kind of cheap discs that are different from genuine discs, which is not conducive to the development of the publishing market, but has promoted the development of movies to a certain extent.

Pirated disc

Right!

A pirated disc is a cheaper type than a genuine disc

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Difference between genuine and pirated discs

I rarely buy pirated discs (not more than 4 in total). Some time ago, everyone was buying Cai Qin's "Meet" and "Opportunity" to say how effective it is. I have already bought Cai Qin's "Old Songs", "Remembering the Classics" and "Folk Songs Tsai Chin". I'm afraid I can buy a new disc with the same style and the same recording effect, but I can't help tempting, so I decided to buy a pirated version first. Listen. So ten yuan bought back the high-quality pirated discs that I described in the response of the post "Masters, why don't you talk about the D version?" In addition to all the titles of "Meet", this disc also contains The 4 songs on Opportunity, including Opportunity, can be said to be very valuable. When I went home, the effect was extraordinary. The singing and orchestration were very HI-FI, a step higher than the previous discs, so I immediately bought back the genuine "Meet" and "Opportunity". Looking at this pirated disc that had completed its mission prematurely, I had a sudden idea: why not use this ready-made baby to actually test the difference between pirated and genuine? So this comparison test.

Test equipment: TEAC VRDS-25 CD player, Golden Throat C-265 front stage, Golden Throat P-450 rear stage, Zhuo Li Noble No. 3 speaker (wire omitted). The contrast track is mainly "Meet", first use Goethe 80 headphones to plug in the headphone jack for comparison, and then use the speaker to play the comparison. Really better than not knowing, one by one, the difference between the two is too great. The biggest flaw of piracy is that the left and right channels seem to be reversed: the violin sound at 1 minute and 20 seconds, the genuine disc is on the left, and the pirated disc is on the right; the triangular iron at 2 minutes and 10 seconds, the genuine disc is clearly to the right While pirated discs are slightly to the left. Secondly, there is a difference in sharpness. The pirated discs have a larger mouth shape than the original discs, which is a bit "blind." The "spitting sound" and "water change sound" of the original discs are obviously truer than the pirated discs. Furthermore, in the positioning of the sound field, the genuine disc is significantly stronger than the pirated disc, such as the triangle iron at 2 minutes and 10 seconds. At the beginning, the pirated disc also appears to be positioned slightly to the left, but it is a bit "floating" at the back, which makes people confused. Where is halal positioning? The last is the high and low frequency extension of the accompaniment. Piracy is not as complete as genuine discs, especially when the amount of accompaniment increases and the amount of music information increases. The general feeling is: listening to the original disc is more comfortable, the effect is better. Later, I simply used "opportunity" to conduct a comparative test. When I heard Tsai Qin's monologue, it seemed that I was a little stuffy when listening to pirated discs, but not when listening to genuine discs.

Facts have proved that the effects of pirated discs and genuine discs are indeed different. Such relatively well-made pirated discs are still the same. Compared with genuine discs, the differences are even greater.

Some enthusiasts may be dissatisfied: we play the computer, the installed Windows 98 and other software are all pirated, and the CDROM grade used is also average, why the effect is the same as the effect of installing genuine software, and I do not see the computer often crashes what! If the difference between the original disc and the pirated version is large, a software with a 0 or 1 difference may lead to completely different software. As a computer engineer, I can tell you the secret: the data format of a computer disc is different from the music data format on a CD. The data of the computer disc carries a large amount of redundant error correction codes and sector positioning information. Therefore, when the optical drive reads the disc and finds that the positioning is incorrect, it will repeatedly adjust the optical head to adapt to the idling process (you can often hear the optical drive in the Abnormal sound during this adjustment). If there is an error in the data, the redundant error correction code can be used to automatically correct the erroneous data. If there are too many errors that can't be corrected automatically, the computer will have to go on strike and tell you that it can do nothing. Therefore, for computer discs, there is only the problem of whether they can be read, and rarely the problem of misreading. In this way, the quality of the optical drive is only reflected in the speed of the speed and the strength of the reading ability, not like the CD turntable, the price can be dozens or even hundreds of times worse.

The CD format was determined before the personal computer was invented. At that time, technical limitations made the CD data format inherently inadequate. Redundant error correction codes in CD data were much less than those in CD-ROM. Some error correction codes were even related to Music data is placed on different tracks. The most terrible thing is that the CD has no sector mark. The CD player's optical head reads 0 or 1 digital music signals at a constant linear speed. The information line along the spiral is read from the inner circle to the outside. Once it starts broadcasting, it can only go on at such a constant speed. (Otherwise, it will not be able to return to that pause point because there are no sectors.) Once there are fluctuations in other electrical environments such as voltage, the stability of the CD player's turntable, or the quality of the CD, the CD player will read an error. Data (wrong data read at the right time, or correct data read at the wrong time is wrong data for CD playback), at this time it will never stop reading a certain section repeatedly, nor will it Can't fix the error and strike (you can feel this more when you listen to the CD with a computer optical drive), you can only use interpolation algorithms to confuse the pass, so what is the data read from the CD, and the quality of the CD player turntable and the original disc itself The quality of production has a lot to do; the software data read from the CD-ROM is first put into the computer's memory and then executed, so it doesn't matter that all 0's and 1's are read earlier and later, and CDs are different. 0 and 1 Read must be strictly chronological order, time synchronization will not seriously affect the quality (ie, "at the wrong time read the correct data"), which is the so-called "time-base error" (JITTER). All of this makes it impossible to copy the data on a CD exactly as it is on a computer disc. It also leads to the fact that the quality of the CD turntable is crucial to the final sound, and the quality of the CD turntable and decoder. Coordination determines how much the time base error is, which only results in the fact that the price of the CD player can differ by hundreds of times. Sadly, it was all caused by the inventor of the CD! If the CD format, like CD-ROM, adds a lot of error correction codes and positioning information, and adds more time synchronization information to eliminate time base errors, it is impossible to have tens of thousands or even hundreds of thousands of CD players. The sound heard with a CD player of three to four hundred yuan is exactly the same as that heard with a CD machine of several thousand yuan. A pirated disc is just like a pirated software and is exactly the same as a genuine one.

I hope that the above explanation will clear up the confusion in the hearts of many fans. In short, enthusiasts who buy genuine discs are not fools. It is impossible to pay more for them without any difference. Still the jargon: ears receive the goods.

It is sensible to buy piracy in the following situations:

1. Only interested in the melody, not focusing on the sound effect;

2. Hearing insensitivity, or no hearing training or practice, can not hear the difference between genuine and pirated discs;

3 Although I can hear the difference between genuine discs and pirated discs on good equipment, but my own equipment is limited, and there is no difference between playing genuine discs and pirated discs;

4 Restricted economic conditions.

As for the economic conditions, friends who have enough equipment, pay attention to sound effects, and can hear the difference between genuine discs and pirated discs, buying genuine discs is the only option. If it is only for economic reasons, it is recommended to use a better blank disc to copy on a special recorder (the quality is not good on the computer), the effect is slightly different from the genuine disc, and the cost is slightly more expensive than the pirated disc .

Of course, the genuine discs mentioned here do not include the products of domestic CD manufacturers, let alone the so-called imported editions. The so-called genuine discs in China are the culprits in damaging the reputation of genuine discs. They are the ones who earn real profits. Many enthusiasts believe that the sound quality of genuine discs is not different from pirated discs, mainly from the conclusion that these so-called genuine and their pirated versions are compared.