Walkman is small, light weight to carry on the resumption, recording, put the sound equipment, such as Sony's previous Walkman, AIWA JX505 JX such series, Panasonic, etc.; later CD, MD, MP3, MP4, cmmb digital mobile TV, portable, pocket, play a sound with headphones is its character, is a kind of electronic products. Initially only a Walkman radio, tape playback or recording, due to small size, when the collapse at the waist to carry, and more young people to use. With the development of electronic technology and progress, the volume becomes smaller, the evolution of many kinds, including CD, MD, MP3, MP4 and other species, and player market in the founding of the Sony-Walkman dominate after 25 years, the market gradually MP3 by erosion, have been replaced by Apple's iPod market share in the first position.Edit this paragraph player developmentWorld's first Walkman by Sony Corporation in 1979 developed the Walkman portable cassette player, marking the birth of the concept of portable music, but the term has since become the Walkman portable music player, a synonym. Walkman development has now been twenty years, during which the constant emergence of new audio player sonyMusic standards and varieties are still in the popular Walkman main Walkman, Discman, MD, MP3 player four. Walkman in this paper which refers to the way 磁带随身听 analog recording, first a simple talk about the tape for the playback medium of the Walkman tape player. Since 1966, Philips released the audio tapes since the first case, as a music storage medium, it is in the market penetration has reached the point where women and children, while the tape is in the current price of the four mainstream Walkman minimum storage medium. Convenient recording tape and good shock resistance has long been widely recognized. Walkman's biggest flaw is that it uses analog tape recording, magnetic tape, a sense of relying on the distribution of particles recorded sound, it almost sound quality of digital sound quality and now can not be compared, but also in so long a 'band', we should quickly find a song which is quite difficult. While some technologies such as Dolby noise reduction to compensate for the shortcomings on the sound quality, and some mid-range models have adopted a fast search of a song at the beginning and end of the method to achieve a direct function of the song selection, but the Walkman After all, in front of many digital music players is a spent force, at present it is the most real place is that learning a foreign language, but some students like pocket deflated deflated, they might also preferred price cheaper Walkman (areas of expertise and high-end applications by excluded). Next up are three kinds of digital music players in the boss - Discman (CD player). SONY Discman is launched in 1984, in the next few years, this product swept the world, but high prices due Discman and CD discs are usually more expensive than ordinary tape several times, so Discman into the mainstream market, probably only four or five years or so. Currently, Discman the prices have come down to more reasonable price, usually five or six hundred you can buy a Nissan's low-end products, domestic production is even cheaper. The Discman advantage, even in today's rapid development of digital music, CD is still synonymous with the highest quality, it is beyond the audio range of human hearing range, is beyond the reach of the tape! Some of the Walkman is "advanced" features such as automatic selections, song playback, optional replay, only the basic functions on the Discman it. The Discman biggest shortcomings than the volume too large, very inconvenient to carry, under normal circumstances few people would leave it hanging around the waist or pocket or belt it out the best back a bag! Another point is that players in the mobile use, the laser head will have stopped reading the data, although currently there have been numerous anti-shock technology, but still the sound quality or battery life will have an impact. Currently produced in the aiwajx505 DiscmanThere are many manufacturers, there are Sony (SONY), Matsushita (Panasonic), Kenwood (Kenwood), Epworth (aiwa), Philips (Philips), etc., most of the domestic market has been occupied by SONY and Matsushita, the even steal the show in the Walkman on the market only in the SONY Aiwa and Panasonic is caught between. SONY CD which is setting the standard in DISCMAN manufacturing has certain advantages. Price-to-bottom offer different choices, so has a very strong competitive edge. The sound quality on the Sony features in delicate and accurate, the sound at the end of warmer, more resistant to listen. Relative to SONY, the Panasonic model undoubtedly come from behind, the Japanese side of the statistics, Panasonic Discman sales figures have far more than SONY. Panasonic successful for many reasons, but most importantly, cheap, either Walkman or Discman, almost every product on the same grade, better than Panasonic's lower price, or be able to provide more accessories. Currently the three most popular digital music player is the MD and MP3 players. MiniDisc MD is the abbreviation for the first time in 1992, published by SONY, a music publishing industry for the design of magneto-optical disk storage media, its quality can be close to the CD, currently in Japan in the Asian region very popular. In 1993, SONY has also made the computer data storage used MD Data Drive (on the computer and almost with the MO). The so-called mini-discs, which store music in a physical medium is placed in small plastic case within the 160MB (data mode, 140MB) a small disc, about 74 minutes of music can be stored and can be repeated numerous times to write music wiping data. MD format is primarily defined two new CDs: one is the magnetic disc can be recorded, for home recording use; the other is not recorded CDs for music distribution with (in fact there is an unusual hybrid model ). CD-ROM the size of the two formats are 64mm, using what is known as ATRAC audio compression technology and the specific storage format. It is because there is an audio compression technology exists to facilitate the MD can be stored compressed about 60 to 80 minutes of 44.1Khz, stereo music. To MD so hot for many reasons, most important is its small size relative to the Discman many. MD rewritable magneto-optical disk itself is only 64 mm in diameter, thickness of 1.2 mm, it is built on the 72 × 68 × 5 mm hard plastic protective case, the computer looks and a similar structure with the silver plate, but the actual disk size smaller than three inches. Beyond the carrier film is less than the CD, but you can enjoy similar to CD quality sound, which is its greatest success. MD CD and high durability are obvious to all, and tape recordings of very poor quality and the CD is easy to compare the characteristics of wear and tear, MD virtually no physical defects, essentially external factors will not affect the magneto-optical disk MD. In addition, MD similar to the computer hard disk sector is stored can be easily moved into position to remove the song, and a free split or combination of track segments. The disadvantage of MD is relatively large. As expensive (machine, disc, even the best have a computer or a Discman + a lot of CD), recorded music a long time (even if recorded songs from the computer, it can not be as easy as copying files, to record more how long it would take a long time music), as the data carrier is too much trouble, as the Walkman or the volume is too large and so on. It is precisely because of the huge amounts of money to promote SONY, good business, operational, luxury packaging, huge brand appeal, etc., contributed to the success of MD. The current MD of the few brands available in the market the more common are SONY, SHARP (Sharp), Panasonic, Aiwa, Pioneer, SONY and SHARP is one of MD on the market, "TWINS", whether in technology or product on, have their own attractions, and other manufacturers use these two movements, or their products directly to OEM. Finally, the turn in the little brother of digital music players - MP3 player (Walkman) has. In 1998, Han Guoshi Korea (SEAHAN) introduced the world's first MP3 player, the next in just a few years time, with the popular MP3 music format, global network, MP3 players in the major world-class manufacturers are more and more mature under respected for its fast file transfer recording, and the shape is more cool, more and more functions, whether at home or abroad (except for Japan, they true to his camp, MD), more and more by the majority owners of the trendy fashion favorite. MP3 music compression developed in order to deal with a mathematical algorithm, mainly used for rapid and effective dissemination of audio. With the rapid development of the Internet, coupled with Scour net, Napster to provide music and MP3 player pocket under the radioSet of Internet companies have mushroomed, MP3 quickly become the preferred desktop Internet audio formats. MP3 is so popular, people are dreaming that it can be also used in portable consumer electronics products. To this end, need to find a storage medium storing music files. The disadvantage of the Discman and MD, in fact, precisely the advantages of MP3 players. MP3 player because the music is stored in solid state Flash memory, there is no mechanical transmission parts, we are not afraid because the vibration caused by physical impact, and not designed in the shape of CD size limitations, they can be arbitrary small and cool design shape. In addition, compared with the MD, MP3 player and a great advantage lies in its "recording" process - just the music files copied from the computer can be simple. In other words, the recording time is much shorter than the actual playing time, just a few minutes to get a CD with a considerable length of music, plus MP3 music of "new sources" online everywhere, this is Mo and MD forget the dust of. However, MP3 players also have an Achilles heel - poor sound quality. Well-known MP3 music format is an efficient lossy compression, and CD sound quality simply can not be compared, even with the same compressed compared to the MD, is a lot worse, since this is a true MP3 music music enthusiasts held in contempt of the main reasons (in particular, coupled with good headphones, the audio quality between the two is fairly obvious).
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