December 29 01:17 1》How to choose a DVD player?
The emergence of DVD has undoubtedly brought a cold wind to the very hot VCD player market, but it has also brought good news to many AV enthusiasts who are not satisfied with the image effects of VCD. Recently, a variety of DVD players have been launched on the market, which is indeed refreshing. Compared with VCD, the advantages of DVD are obvious, whether in terms of image clarity, high-fidelity sound, or the playback capacity of the disc. They are far better than VCD, and its charm is really hard to resist. Faced with the continuous introduction of DVD players on the market, how should consumers choose a DVD player that satisfies them based on their actual situation?
(1) Attention should be paid to the region coding of DVD. Since the birth of DVD, the American Film Industry Alliance has been worried that the emergence of DVD will also lead to crazy piracy and reproduction like VCD, so it adopts DVD technology to produce restrictions - namely zoning. They divided the world into six different levels of DVD system playback software areas, stipulating that DVD players in each area code can only play DVD discs with the same area code. The specific division range: the first area is North America, including the United States and Canada; the second area is China and Japan; the third area is Hong Kong and Taiwan; the fourth area is Central America, South America and Australia; the fifth area is Russia and North Korea. , India and South Korea; the sixth region is mainland China, and the codes in each region are incompatible with each other. Therefore, when consumers in our country purchase DVD players, they can only choose those marked with "Region Six" or "China Region" The model and disc can function properly. It is worth noting that many second-region models (i.e., Japanese regions) have entered the Chinese market, and the prices are lower. Therefore, consumers should pay attention to identification, otherwise, if they buy DVD players from other regions, they will It cannot be used because the disc with the same area code cannot be found.
(2) Pay attention to the compatibility of DVD players. As a latest technological product, the software of DVD players cannot keep up. Currently, there is a shortage of DVD-related video discs. Therefore, it is important to buy DVD players. Enthusiasts should pay attention to the compatibility of the model, that is, it can play other disc types (such as LD or VCD, etc.). Otherwise, if there are no DVD discs to play at the moment, the machine will be idle and cause unnecessary waste. Therefore, if you like large video discs, you can buy a DVD/LD compatible machine. If you like VCD, you can buy a DVD/VCD compatible machine. There are also DVD/LD/VCD fully compatible machines. Consumers can choose according to their needs. Choose according to your own hobbies and needs. But for AV enthusiasts, it is not wise to choose a compatible machine, because the effect of using DVD to play VCD and LD is not better than that of a player with a single function (LD or VCD), and the current performance of LD and VCD players The price is quite cheap, even if you own them all, it is only the price of a fully DVD-compatible machine.
(3) Selection of DVD practical functions At present, ordinary DVD players have an S terminal, a set of composite video terminals, an AC-3 standard six-channel surround sound stereo terminal and a set of coaxial Audio terminal output, or two sets of audio output terminals. Other functions, such as those on VCD players, are generally available in DVD players, such as digital karaoke, fast and slow mirror playback, still images, menu functions, time memory playback, etc. Of course, the function settings of different models of machines will be different. More functions are not always more, and the price of models with more functions will be correspondingly higher. These should be determined according to the financial situation and hobbies of the buyer.
2》How to choose a DVD player
Experts remind: First, pay attention to AC-3, and second, consider the price and performance
The development experience of DVD players It has passed through the two development stages of "I don't know where it is in the depths of the clouds" and "it comes out after being called out, but it is still half-hidden by the pipa". Thanks to the painstaking research and hard work of many manufacturers' researchers, the price has continued to fall and the quality has continued to improve. However, some manufacturers take advantage of consumers' lack of understanding of the details of DVD products, cut corners, and shoddy products, in an attempt to capture the market at a lower price, which has brought a haze to the DVD player market, and at the same time also It has caused great harm to consumers.
Today's DVD player technology is developing at a rapid pace. New products, new models, and new styles are emerging one after another. The product prices vary. You have to choose a DVD that satisfies you and your family from the dazzling array of shelves. It's really not an easy task.
A: Buy real Dolby AC-3
For consumers, the most important thing in terms of functionality is whether it has real Dolby Digital (AC-3) 5.1 channel decoding.
Many brands of DVD players have the Dolby logo on them, but do all machines have AC-3 decoding capabilities? The answer is no. According to the survey, many DVD players cannot realize the true AC-3 decoding function, but use the following methods instead:
1. Simple two-channel. Regardless of whether the audio data on the disc is encoded in accordance with AC-3, it will be output as a two-way mixed audio. Since the audio output of the remaining four channels is omitted, the hardware cost is greatly reduced, and the patent fees paid to Dobly are greatly reduced compared with true Dolby AC-3 decoding. It is a low-priced solution for DVD players. In this way, users can only hear simple left and right channel effects. If you want to enjoy the true Dolby AC-35.1 channel surround sound effect, you need to connect an external AC-3 decoding power amplifier with coaxial or optical input terminals. Its market price is about 2,000 yuan, that is, you need to buy another DVD player. The price of the machine.
2. Two channels with six output terminals. This method is also called "fake six-channel". It actually only has three sets of the same two-channel output. It is a simple copy of the two-channel machine and cannot achieve the real Dolby AC-35.1 channel machine. It is often easy to become a source of legitimate interests. Therefore, consumers should carefully screen when purchasing.
3. Virtual simulation of AC-3 channels. This method uses a sound field processing chip to simulate two-channel audio through software algorithms such as superposition and cancellation to simulate an AC-35.1 channel decoding output? The effect of Dolby AC-35.1 channel, but because all its sound sources come from the two main channels, the expressiveness and layering of the sound field are much inferior to those of real AC-3 decoding, and it is easy to confuse audio-visual and harm consumers. interests.
So, what is the real Dolby AC-35.1 channel decoding output? Dolby AC-3 is a perceptual encoding technology specially designed for multi-channel digital audio. It combines sound quality and advanced digital signal processing technology to achieve unprecedented high efficiency, high quality and versatility. In multi-channel form, Dolby AC-3 provides five full-audio channels, which are arranged in a 3/2 structure: three front channels (left, center, and right) plus two surround channels. channel, and a channel for bass audio effects. In layman's terms, they are front left, front right, center, surround left, surround right and subwoofer, which are the so-called "5.1" channels. Compared with analog AC-2 (Dolby Prologic), Dolby AC-3 has two completely independent surround channels, each channel can provide the same full-band fidelity as the front three channels Audio. Therefore, the decoding that truly reproduces the above effects is the true Dolby AC-35.1 channel decoding.
B: Price selection should be based on machine performance.
Price is the issue that our consumers are most concerned about. But it is very unwise to talk about price without performance. Non-branded machines are cheap, but their performance is unreliable and few patronize them. The direct reason is that their performance and price are relatively low. In terms of performance, they can generally be divided into the following situations:
First of all, external The content is expressed in basic functions. DVD players with Dolby AC-3 decoding, MP3 decoding, DTS digital output, optical fiber and coaxial output have become standard configurations recognized by the market and should be classified as mid-range; while the ones mentioned above do not have Dolby AC-3 The decoding machine is only at the level of DVD in terms of image quality. It is not a standard DVD player at all. As consumers gradually improve their ability to appreciate audio, it will soon be eliminated from the market because hundreds of them will It can be used as an entry-level product to meet the needs of some friends who have limited money to watch DVD programs.
Secondly, it is the connotation of performance, which is reflected in the compatibility, stability and error correction of the product.
Regarding this point, I think those who have experience with VCD players know better. When exciting programs cannot be played freely on the machine, the annoyance may make you more cautious when purchasing DVDs. Some manufacturers, out of consideration for their own interests, rush to market before their product solutions are mature to earn huge profits. Consumers should be particularly careful about this.
Third, it is reflected in the ductility of the product. High-fidelity HDCD support with stronger sound field layering, more nuanced sound details, richer and more digital flavor is only a new thing abroad, but domestic manufacturers with strength and responsibility have made it a standard configuration of new DVDs , dedicated to the majority of consumers. Relatively speaking, for the majority of audio and video enthusiasts, four-channel Dolby ProLogic surround sound (AC-3 or Dolby ProLogic) is not a new thing, but its decoding support is not something that all DVD players are capable of. In the early days of the development of audio-visual technology, this method was popular all over the world as a de facto standard, and almost all multi-sound movies, LD and music products adopted this method. For this kind of output form, in the past, we often used an external power amplifier with this kind of decoding function (the price is about a thousand yuan) to experience the cinema-like shocking effect. Now, some powerful brand DVD players have built-in this kind of decoder, and the price has basically remained unchanged. Smart consumers may wish to consider it. In addition, it is worth mentioning that some well-known manufacturers in the audio industry have also noticed this new change in the DVD player market and are working on developing a six-channel pure power amplifier without any decoding. This new product will help the majority of audio and video users rationally allocate resources and will not waste investment due to duplication of functions.
It can be seen that the price is not the process of choosing a DVD player. In essence, it is the process of choosing a brand that has a strong sense of responsibility for consumers and the market, has stable machine performance, powerful functions, and is reasonably priced.
3》How to choose a home DVD player
After last year’s new product + price war, DVD players have taken off their expensive coat and entered the homes of ordinary people. Nowadays, you can buy an ordinary home DVD player for a few hundred yuan. If you think it’s time to buy one, where should you start?
At present, DVD players can be roughly divided into two categories according to their uses, professional audiophile level and general household use. The price of professional audiophile level is several thousand or even tens of thousands, which is more suitable for people in the audio and video industry or audiophiles; there is no special According to your needs, it is enough to buy an ordinary home DVD player, and the price is generally less than a thousand yuan. Here are some suggestions on how to choose a home DVD player.
Why does choosing a DVD player start with the "core"? The advancement of DVD is mainly reflected in two aspects: First, better image quality and more realistic sound effects. But if you want to get this more advanced enjoyment, you must have a DVD internal chip to process the image and sound. With a better chip, you can better enjoy the realistic effects brought by DVD.
DVD players are not like computers. In the past, few people noticed what chips were used in DVD players of different brands, and no one would take apart the machine to check when purchasing. So how do you understand the DVDs of different brands? What chip does the machine use? Nowadays, domestic DVDs are very good in terms of technology and quality, and most domestic brand DVDs now use chips from major foreign manufacturers. If divided according to this, domestic DVD players basically fall into two camps. Manufacturers that mainly promoted CVD at that time, such as Jinzheng, Malida, and Xiamen, still used C-CUBE's decoding chips on DVDs; while TCL, BBK, Xinke, and SVA (SVA) and other manufacturers that followed the SVCD route at that time mostly used decoding chips from other companies. One of the more representative ones is the decoding chip from Cirrus Logic. Cirrus Logic has obtained many technical patents in the DVD field and uses this chip. Its products are very popular in developed regions such as North America, Europe, and Japan. Because its chips have obvious technical advantages and high cost performance, domestic manufacturers have also cooperated with it: TCL's TD-3720P uses this kind of chip and is a cost-effective machine. type. When watching DVD movies, the colors are not only full and gorgeous, but the anti-interference and stability are also enhanced.
Delicate pictures alone are not enough to impress people. They must also be matched with realistic modern home theater sound effects, which puts forward corresponding requirements for DVD players.
Among the many audio output methods, Dolby AC-3 and DTS are designed to make you feel immersed in the scene. At the same time, they have basically become standard equipment for mid-range and above DVD players.
The concepts of HDCD and DVD-Audio have also come into our sight. Both are upgrades to the existing CD music standards, but the latter is more revolutionary, claiming to have 1,000 times more resolution than CD. , with the characteristics of high sound quality, large capacity, multi-channel, and interactivity. DVD-Audio, like existing CDs, also stores music on optical discs.
Of course, it is not enough for a DVD player to have an advanced sound decoding processing chip. If you want to get realistic and shocking sound effects, it is not enough to rely on TV speakers. You must also configure audio equipment to form a home theater. The price of a home theater ranges from two to three thousand yuan to tens of thousands of yuan, and you can choose it as needed.
When purchasing, it is best to choose well-known brands at home and abroad. The products of these major manufacturers are more secure in terms of material selection and after-sales service. Today's famous brand products, even the mainstream DVD models using high-quality foreign decoding chips, have fallen below a thousand yuan, concentrated between 600-900 yuan. In this price range, there are the most types to choose from.
However, products that support the latest technologies such as DVD-Audio are still around 1,200-1,400 yuan. In addition to excellent performance in playing DVD movies, products of this level can also enjoy DVD-Audio discs. Considering that DVD-Audio discs are still relatively rare in China, this type of product is a bit ahead of its time. However, DVD players generally come with a DVD-Audio disc as a gift when purchasing, so music-loving friends can enjoy it in advance.
Of course, DVD models priced below 600 yuan also exist, but some products remove some of the sound decoding chips introduced earlier. If you are not so picky about your appreciation requirements, you can also consider such products. Of course, this does not include the promotions offered by some home appliance shopping malls for certain high-end models: limited special offers, coupon promotions, etc.
The last thing you need to pay attention to is the output interface of the DVD player. Many DVD players can be connected to computers and progressive color TVs. In terms of audio, many disc players also support optical fiber and copper shaft output. Friends who have audio, high-end color TVs, MD machines and other equipment may wish to pay attention. Qiao Lin
4》How to choose a new DVD player
Building your own home theater has become a new fashion in many families. To assemble a home theater, in addition to a large-screen TV, it also includes surround sound amplifiers, surround sound speakers, and program source playback equipment---VCD players or DVD players. DVD players are program source playback equipment that integrates the latest contemporary digital audio-visual technology. In just a few years, their products have been updated rapidly. Currently, the third generation of DVD players have been launched one after another. Therefore, consumers should focus on the third generation of DVD players when purchasing DVD players. This article briefly introduces the main technology, performance and features of the third generation DVD player, so that consumers will not be blind or deceived when purchasing a DVD player.
The third-generation DVD player combines the advantages of the first two generations and adopts updated manufacturing processes and production technologies to make the IC in the player more integrated and the number of IC chips relatively reduced; in addition, The accuracy of the whole machine has been improved and it is safer and more reliable, and many new functions have also been applied. Among the third-generation DVD players, the most important audio digital-to-analog converters mostly use 96KHz/24bit chips, while the video digital-to-analog converters use 27MHz/10bit chips. Therefore, these two data can be used to determine whether the DVD player belongs to the third generation. One of the important indicators of third-generation products. In addition, in order to improve the picture clarity, many DVD players have begun to have built-in video scanning multipliers, thereby nearly doubling the picture clarity. The newly launched mirror TVs of 29 inches or above have a resolution of more than 500 lines. These TVs are more suitable for use with third-generation DVD players.
Paying attention to the application of digital surround sound is also one of the characteristics of the third generation DVD player. Many new DVD players have built-in Dolby Digital and DTS decoders and are equipped with corresponding output terminals. Many of them have begun to accept THX certification standards and launched new THX DVD players. Of course, the price of this type of DVD player will be more expensive.
Since many surround sound amplifiers currently have built-in Dolby Digital and DTS decoders, in order to avoid duplication of investment, consumers should pay attention to three choices when matching them; one is to use a DVD player with built-in Dolby Digital and DTS decoders. 5. A surround sound amplifier with a 1-channel input terminal; the second is to use an ordinary DVD player with a surround sound amplifier with built-in Dolby Digital and DTS decoders; the third is to use an ordinary DVD player with an ordinary surround sound amplifier, and then Connect an external DolbyDigital and DTS decoder. The third method has the best performance, but may also be the most expensive. From an economic point of view and convenience, the second method is the best. Consumers can determine the method they choose based on their own circumstances.
In order to enhance the flexibility of configuration and improve the utilization of existing audio equipment, most third-generation DVD players are equipped with various virtual surrounds because ordinary households only use a pair of stereo speakers. Sound systems; such as DVS Dolby virtual surround sound, SRS real virtual surround sound, Spatializer's latest N-2-23D surround sound, etc. This type of DVD player can also be used with an ordinary audio amplifier and a pair of main speakers to listen to virtual multi-channel surround sound effects that are effective.
According to the current situation in our country, the newly launched domestic DVD players and some imported DVD players sold to our country can not only play DVD discs, but also CD records, VCD discs, and super VCD discs. Etc., some high-priced models of DVD players can also play CD-R discs, DTSDVD discs and THXDVD discs. If consumers have not yet purchased a VCD player or super VCD player at home, from a long-term perspective, they should give priority to purchasing a DVD player.
The third-generation DVD player pays more attention to the interactivity of human-computer dialogue in terms of basic settings and function operations. The highly intelligent and fool-like GUI on-screen menu and graphic instruction operation eliminate the need for users to perform complicated settings or operations. They can easily complete various function settings and operations by simply pressing the remote control. Among the basic settings, digital surround sound mode selection, image quality adjustment, zoom function, mosaic filtering, etc. are more common. Of course, different brands of models will differ in this regard, and consumers should ask clearly when purchasing.
Regarding the region code issue of DVD players, the restrictions on third-generation DVD players have been quite relaxed. However, general consumers should note when purchasing that the area code for mainland China is "6". There are also DVD players on the market that are universal for all regions, and there are also DVD players that convert single-region to full-region DVD players. This is an open secret. When purchasing, consumers can bring several DVDs with different region codes. If the DVD player you choose can play these DVDs normally, then it is probably a full-region DVD player.
Finally, it is about the output of DVD players. When purchasing a machine, consumers should pay attention to the settings of the various output terminals on the back panel of the machine. Generally, there should be one to two pairs of analog audio output terminals, one to two pairs of coaxial video output terminals, and one to two pairs of S-Video video terminals. , a coaxial digital output or an optical fiber digital output terminal, a set of 5·1 channel output terminals, and a set of color difference component output terminals. If your large-screen TV has a set of component input terminals on the back panel and uses the component output terminals of the DVD player, the picture clarity will be the best. By the way, when purchasing a DVD player, you should repeat the movement of the DVD disc tray in and out several times. There should be no "squeaking" sound, and the movement in and out should be smooth and not swinging from side to side. In addition, the power input of many foreign brands of DVD players has two settings: 120V and 220V. There is a power voltage conversion switch near the power socket on the back panel of the machine. It must be converted to 220V when using it, otherwise the machine may burn. I hope that after understanding some of the above-mentioned common sense about DVD players, you can choose a product that satisfies your needs. In your own home, you can enjoy various movie programs with realistic sound and picture effects.
5》DVD~
The ones sold in shopping malls are probably genuine, and you can buy them there.
If they are in other places, you have to Check to see if it is the official disc version. The official disc version is a type of pirated version. There are downloadable versions and gun versions. The gun version is directly recorded in the cinema. The effect is very poor, worse than VCD. I guess you need to ask more and read more.