Creating DVD Player

Hard digital video or digital versatile disk (DVD) is a type of optical data storage media capable of holding up to 17-giga byte (GB) of information. First introduced in mid-1990, they were developed as an improved form of compact disc (CD) technology. DVD can produce such high-quality images and sound, they are expected to eventually replace both the VCR and CD player. It is anticipated that the market for DVD players will reach 10 million units in 2000.BackgroundDVD works in the same way as a conventional CD. Just like on the CD, the information is encoded as a series of small holes in the disk. The hole was held in a spiral path in a structure similar to the cassette. By using a laser, this hole can be interpreted as a binary code. When the surface is smooth to read, interpret machine data point as 0. When the hole is encountered, the data points read as 1. However, the key innovation that makes DVD superior CD is a laser used to read and make a hole. DVD uses a shorter wavelength red laser that can put holes are more dense on the disk surface. This not only allows for more data, it also requires that the disc is only half as thick as a conventional CD. As a result, the two layers can be bonded together to make a double-sided disc that has the same thickness as a CD (1.2 mm).DVD system has three features, which makes it very desirable, including high storage capacity, interoperability, and back-ward compatibility. In the early stages of the introduction of DVD, single disc will hold as much as 4.7 GB of information. This is roughly equivalent to seven CD-ROM. In future releases of this technology, the disc can store up to 17 GB. This amount of storage space that will really change the way a computer program was developed and will allow for the inclusion of the video clip again. The data format and the lasers used in DVD players will be the same for the computer like for players television. This will allow consumers to play the same disk on their computer that they play on their TV. DVD players will also have the ability to play CD technology. In this way, consumers do not need to buy a replacement product of their current CD collection.DVDs can be used for a variety of applications including film, audio systems, computers, and video games. Since the in-formation stored on disk is an electronic, image quality is estimated three times better than conventional VHS image. In addition, the image will not degenerate with age or use. The computer program also will benefit from the DVD. For example, the program used to pick up some CDs can now be condensed into a single DVD. Video games also will benefit from the DVD technology. Since the DVD offers the possibility of high memory and interactivity, video clips can be incorporated to enhance the playing experience.HistoryDevelop the ability to store data for later is always important. First correct data storage and retrieval systems are journals and ledgers. While they are still in use today, they are slow, inefficient, and large. When a computer is being developed for 1950 and 1960, one of the main benefits is their ability to store and retrieve data quickly. It has now become one of the cornerstones of information storage and retrieval. Early computer storage media include things such as punch cards, vinyl LPs, magnetic tapes, cartridges, and magnetic disks. As computers increased, so did data storage capabilities. In the late 1970s, the internal hard drive was introduced. Each data storage system developed to improve comfort and efficiency than the best available method of storage. Many of these systems continue to be improved on even today.The development began with the introduction of the DVD by Sony from the CD in the early 1980s. This new storage media used lasers to read the small hole carved in the disk. The first audio CD player introduced in 1983. They are useful because they allow to save over 75 minutes of music on a single disc. That's nearly twice what vinyl LP can hold. While they are slow acceptance, CDs eventually replaced cassettes as the preferred media choice for audio broadcasts.Video CD players were introduced at the end of the decade. For various reasons, they never became popular enough to replace the VCR. The use of CD in the computer began in 1987. This device is very useful as it allows storage of up to 650 megabytes (MB) on a single disk. Until then, the maximum storage on magnetic disks is 1.3MB. CD Early computer is slower than a typical disk drive and read it. Data transfer speeds continue to increase as well as their ability to write data. In 1994, 4X speed CD-ROM (Read Only Memory) is introduced. In the next two years is two-fold. In 1996, the speed 24X CD ROM. Recordable CD player was first produced in 1996.Introduced in 1996, the CD write some developed by Matsushita using multiple phase-change process. It uses a laser to change the reflective properties of the disk. Now CD-RW recorder can use this technology.Since all the advancements in technology came a CD, researchers continue to look for ways to increase the storage capacity of this machine. Later, scientists discovered that by using a shorter wavelength laser, more data can be packed on a single disk. This led to the creation of the DVD. In 1997, the first DVD players were introduced. This machine is slower than the fastest CD player and recorded. However, the next generation DVD is scheduled for release during 1999 will be faster and use recording technology. Finally, the DVD is expected to replace VCRs and CD players.DesignA DVD player is designed like a CD player. For example, a computer DVD drive that is the same size and shape as a CD-ROM drive. They also have the outer plastic housing and comes complete with a plastic button on the front panel. Some DVD drives have a plastic tray, which extends out of the machine to accept the disc. Others have an automatic feed system where the disc is inserted. In the DVD drive, a lot of the same electronics as well as the CD-ROM drive. Both have advanced electronics and mechanisms for disk drives, printed circuit boards and assembly of optical systems. While the DVD mechanism drives come in various designs, each of which basically consists of a spindle that holds the disk and a motor that rotates it. Circuit board contains all electronic components, which helps to convert the data being read into a format that can be used.Assembly of the optical system is part of the DVD that reads data from the disk and sends to be converted into binary code. In the DVD machine, consists of a diode RedLaser, which has the ability to produce short-wavelength pulse. This is a low-noise red laser light to produce in the range of 600-650 (nm) nanometers. It is much shorter than the 780 nm laser used in conventional CD. Another major component of the optical system is a diode assembly, which receives the optical signal from the laser and converts it into electronic signals. Very smooth and mirror lenses make up the rest of the optical system assembly.Disk DVD also looks like a CD-ROM, but the data is packed more closely together. Disk surface is coated with a layer of reflective silver that is protected by a layer of thin, hard lacquer. If semitransparent gold layer deposited on
 
Perbandingan jumlah data compact disk dan disk DVD dapat berisi. Kepadatan pit DVD jauh lebih besar, yang memungkinkan disk untuk menyimpan setidaknya tujuh kali lebih banyak data sebagai CD.
Perbandingan jumlah data compact disk dan disk DVD dapat berisi. Kepadatan pit DVD jauh lebih besar, yang memungkinkan disk untuk menyimpan setidaknya tujuh kali lebih banyak data sebagai CD.
lapisan perak reflektif, disk dapat dibuat untuk menyimpan 2 lapis data pada satu sisi. Dengan menggunakan daya yang lebih kecil, laser dapat membaca data dari lapisan emas pertama dan kemudian dengan meningkatkan kekuatan, dapat membaca lapisan perak. Ini hampir dua kali lipat kapasitas satu sisi menjadi 8,5 GB. Akhirnya, disk dua sisi tunggal akan dapat menyimpan hingga 17 GB data.
Sejak DVD diciptakan terutama untuk film, sistem kompresi diperlukan. Untuk melakukan ini, produsen telah sepakat untuk menggunakan sistem kompresi MPEG-2 (Motion Picture Expert Group). Ini adalah sistem di mana hanya elemen gambar yang berubah dari frame ke frame disimpan. Untuk audio, Dolby digital kompresi akan digunakan. Karena kedua sistem kompresi yang digunakan, sebuah decompressor atau decoder juga harus disertakan dalam DVD player. Saat ini, ini adalah kartu yang terpisah yang dihubungkan ke komputer. Dewan decoder memproses data dari disk dan mengirimkannya tepat untuk grafis komputer dan sistem audio.
Bahan Baku
Berbagai bahan baku yang digunakan dalam pembangunan DVD player dan disk. Kaca yang digunakan untuk membuat dioda laser dan lainnya dalam sistem. Komponen utama pada papan sirkuit yang terbuat dari silikon. Logam aluminium digunakan untuk perumahan serta plastik keras. Bahan dasar disk adalah plastik. Mereka selain itu dilapisi dengan lapisan berwarna perak dan lapisan emas tipis. Permukaan disk lebih lanjut dilapisi dengan lapisan keras pernis untuk melindunginya dari kerusakan.
Manufaktur
Proses
Komponen mesin DVD biasanya diproduksi oleh perusahaan terpisah dan kemudian dirakit oleh produsen DVD. Produksi bagian komponen adalah proses yang sangat khusus, dan hanya beberapa perusahaan yang dilengkapi untuk memasok seluruh industri. Komponen utama meliputi perakitan sistem optik,  









                               A DVD player consists of advanced electronics, including the mechanism of disk drives, printed circuit boards and assembly of optical systems. It consists of a spindle that holds the disk and a motor that rotates it. Circuit board contains all electronic components, which helps to convert the data being read into a format that can be used. Assembly of the optical system is part of the DVD that reads data from the disk and sends to be converted into binary code.A DVD player consists of advanced electronics, including the mechanism of disk drives, printed circuit boards and assembly of optical systems. It consists of a spindle that holds the disk and a motor that rotates it. Circuit board contains all electronic components, which helps to convert the data being read into a format that can be used. Assembly of the optical system is part of the DVD that reads data from the disk and sends to be converted into binary code.internal electronic circuit boards and disk drive mechanism.Optical systems* 1 The optical system consists of a laser, a photodetector, prisms, mirrors, and lenses. Laser and photodetector mounted in a plastic housing, and other components are placed in certain places. Great care was taken on the position of each piece because without alignment, the system will not perform properly. Electrical connections are installed and the optical system is then ready to be attached to the disk drive mechanism.Disk drive mechanisms* 2 optical system attached to a motor that will drive it. This in turn is connected to other parts of the disk drive, including the principle of the loading tray (if any) and the spindle motor. Other gears and belts are attached and the entire assembly is placed in the main body.Internal electronics* 3 The electronic components of machinery and advanced DVD using the latest technology in electronic processing. Circuit boards are manufactured much like that of other electronic equipment. The process begins with a board that has an electronic configuration printed on it. This forum is then passed through a series of machines, which puts the right chip, diodes, capacitors and other electronic pieces in the right place. This process is done in a clean room to prevent the damage that can be caused by airborne dust. When completed, it is sent to the next step for soldering.* 4 A wave soldering machine used to affix electronic components to the board. Before the board is inserted into the machine however, was first washed to remove contaminants. The board then heated using infrared heat. The bottom of the board is passed over molten solder wave and through capillary action, the right place is filled. As the board was allowed to cool, the solder hardens holding the piece in place.Final assembly and packaging* 5 When all the components are ready they are assembled to produce the final product. Electronic board connected to the rest of the engine and the main cover attached. DVD machine and then sent along with the packing station where they were boxed together with accessories such as disc, manual, and power cord. They then put on pallets and shipped to distributors and end customers.Quality ControlTo ensure the quality of the DVD machine, visual inspection and electrical are done throughout the whole production process and the weaknesses detected. In addition, the functional performance of each machine DVD finishes tested to ensure it works. This test is carried out under different environmental conditions such as excessive heat and humidity. They involve playing disk tests, which will result in a specific electronic signal. Since most of the DVD manufacturers do not produce all their own part, they are very dependent on their suppliers for good quality. Most manufacturers specify their own quality specifications, which their suppliers must meet.FutureDVD technology is relatively new. There are many areas that will be improved in the coming year. Key developments for DVD including greater storage capacity, improved reader capabilities, and an increasing number of movies are available in DVD format.Currently, the most intensely studied of DVD technology increases data storage capabilities. While the technology has been developed to produce a 17GB disk, some companies have found ways to save even more. A new coding techniques are being developed that can make a three-fold increase in storage DVD. In this method, the hole created on the disk will have different levels of depth. This will allow the hole to encode for the numbers 0 to 8, not just 0 or 1. It is anticipated that the DVD device using this technology will be available during 1999. Other storage media also show particular promise. A recent technology has shown that it can store up to 30 GB of data. The system uses a red laser and a magnetic field to retrieve the data. The use of a blue laser allows for greater storage capacity.Another area of ​​improvement will be found in the DVD player the ability to read two layers of information on one side of the disk. Although theoretically DVD player can read both layers two layers of information is rarely used because of the high cost. As technology improves however, these barriers must be overcome and the full potential of the DVD may be realized.Currently, one of the most inhibiting factor in the development of the DVD is the lack of a universal standard for storing and retrieving media. This is similar to the problems that developed in the 1980s between VHS and Beta video players. In the near future, this issue should be resolved when the major manufacturers agreed format DVD.