|
================================
[Concept] Also called an audio converter, wireless transmitter for car MP3 or MP3 car audio companion, etc., it can be of ordinary MP3 player Car MP3 audio system. Belongs to the 21st century a new car audio products ================================= [Works] Various types of portable music devices such as MP3, CD, MD, the output audio signal, launched a wireless transmitter to the car FM stereo radio equipment owners only need to set the car radio frequency to the frequency of car MP3 or let the radio The search for the frequency can be played. ================================= [Sub class] ----------------- [Power supply] on the sub- Cigarette lighter-style car MP3 / with battery type Car MP3 (7 batteries or button batteries) ----------------- From the audio source] Sub- Independent Audio Interface Car MP3 / U disc Car MP3 / Car integrated MP3 player ----------------- Wired / Wireless] There are lines Refers to the decoded audio signal through the transmission line to the car stereo to play. In this way noise, sound quality if you have a very high demand, they know the sound modification or staff to install, you can use this way. Wireless MP3 output audio signal is launched into a wireless FM car stereo equipment to play. Without connection and adapted for a variety of models, has become the mainstream market. ================================= The course of development]. --------------- The first generation Is relatively simple plug in the cigarette lighter, cigarette lighter to draw power-line products; --------------- Second-generation Phone size portable car MP3, better sound quality, greater capacity The most important sign is the voice control, better adapted to the security needs of motorists. ---------------------- Compare -------------- 1 [sound quality] The first generation, especially low-priced products, in order to save costs, the use of a simple transmitter circuit, the sound quality will inevitably have a greater noise. The second alternative is the most advanced dedicated transmitter chip, to ensure good sound quality. -------------- 2, the life of] The first generation of the biggest pitfalls is the problem of voltage surge damage, rely on the supply of cigarette lighter cigarette lighter cigarette lighter design only, and no regulator measures, so the car starts is often a strong voltage surge. Experts warned the owners, in the ignition of the car, car MP3 Do not plug in the cigarette lighter, or may cause the pressure burn. If you fully comply with the provisions of the manufacturers, it would need to repeatedly plug is sometimes necessary to plug several times along the way, over time can easily cause damage to the Car MP3 or cigarette lighter. The use of second-generation and independent of the cigarette lighter does not exist the problem of short-lived. -------------- 3, the memory capacity] The first generation and some only 128M of memory, can only store dozens of songs. The second generation of memory above 1G, at least be able to store more than three hundred of songs. -------------- 4, the frequency range The first generation, some only two, three frequency points, once encountered the conflict of local wireless signal will not be able to play. The second generation of 200 frequency points, a random choice. -------------- 5, affordable sexual] The first generation can only be plugged into the cigarette lighter in the car The second generation under the car off the wireless transmitter, plug in headphones, is a conventional MP3 of the voice through songs, has a greater value in use. -------------- 6, voice select songs Voice control technology through the development of recent years has made great progress, and very practical stage. Voice song selection is the salient features of the second generation, just say the song title, song, one or two seconds will be able to broadcast in hundreds of song selected to make the drive select songs more easily and securely. It can be said that the voice selected song is the second generation of the most competitive advantage -------------- 7, high value-added] Due to the application of voice technology, then the second generation with more additional features ================================= [Features] a, first as a vehicle equipment, it should maximize the use of auto power, instead of using batteries, the car's cigarette lighter to provide power quality is not very standard, because others are designed for the cigarette lighter device, rather than electrical work car mp3, power supply system must be designed according to the conditions of supply of the car itself, to ensure that the mp3's stable work. b, to consider the car itself, the internal space factors need to drag the line or unreasonable because the volume affect the vehicle's interior clean and even affect the driving operation, are unreasonable. c, in order to consider the safety of driving, the simple use of the general population and other factors must be the "car" as a key consideration, user-friendly design. =================================
【Article is excerpted from: Baidu Encyclopedia】 |
|
|
来自： LOFT生活 > 《Home Topics》
