Multi-disc type digital-code automobile sound equipment

Abstract

The digital car audio in multiple disks type includes base unit and movable panel. The base unit is composed of radio module, external antenna, USB interface, SD interface (compatible to MMC card), audio input jack, circuit of audio power amplification, circuit of low frequency power, and one from optical drive, tape drive, or movable hard disk. The movable panel is composed of CPU, MP3 decoder, USB hub, USB interface, audio output circuit, audio output jack, control key set on panel, display screen, and FLASH memory etc. Using number keys on the control key set on panel selects relevant FLASH memory to play MP3 music in FLASH memory just like using CD player with multiple disks. There are USB interfaces capable of connecting to computer directly. FLASH memory set or one FLASH memory can be fetched from the movable panel as a whole or individually to connect to USB interfaces of computer. Functions provided by the digital car audio are accorded with custom of use by most drivers.

Description

technical field [0001] The invention relates to a digital car stereo, in particular to a multi-disk digital car stereo. Background technique [0002] At present, with the continuous popularization of digital products, digital products have also begun to enter the automotive field. The most representative is MP3 products. Various MP3 products have been used in cars, such as: tape-type car MP3 audio converter, FM car MP3 transmitter, cassette + U disk MP3 player, CD+U disk MP3 player, MP3 hard disk car jukebox, etc., because the tape-type car MP3 audio converter and FM car MP3 transmitter are converted by two-channel stereo head And FM transmission and reception, the music stored in the MP3 player is sent to the car player for playback, the sound quality is average due to the loss of conversion and reception, it is a primary substitute product; Cassette + U disk MP3 player and The CD+U disk MP3 player is based on the cassette player or CD player, adding the interface of the M...

AI Technical Summary

Problems solved by technology

[0002] At present, with the continuous popularization of digital products, digital products have also begun to enter the automotive field. The most representative is MP3 products. Various MP3 products have been used in cars, such as: tape-type car MP3 audio converter, FM car MP3 transmitter, cassette + U disk MP3 player, CD+U disk MP3 player, MP3 hard disk car jukebox, etc., because the tape-type car MP3 audio converter and FM car MP3 transmitter are converted by two-channel stereo head And FM transmission and reception, the music stored in the MP3 player is sent to the car player for playback, the sound quality is average due to the loss of conversion and reception, it is a primary substitute product; Cassette + U disk MP3 player and The CD+U disk MP3 player is based on the cassette player or CD player, adding the interface of the MP3 playback circuit and U disk, SD card (compatible with MMC card). Read MP3 music on the storage disk for playback, because it is directly amplified and output without conversion or transmission, so the sound quality is very good, which can be close to the CD playback effect, but the structure of the U disk and other storage media inserted outside is easy to cause damage to the U disk , and the stored tracks are limited, and the selection of songs is inconvenient, which is a transitional product; the MP3 hard disk car jukebox uses a large-storage mobile hard disk as the storage medium of the player, and uses the front panel controller or wireless remote control to compile the playlist. , File management, the mobile hard disk is generally 20G-40G, the capacity is very large, and can generally store 5000-10000 songs, but the functions of MP3 hard disk car jukeboxes are complicated, the price is high, and it is not easy to popularize (actually there is also the problem of shock absorption effect ), it is not convenient to use while driving a car; in fact, the car player product has developed to the present, the most accepted and popular by drivers is the multi-disc CD player product, the multi-disc player is generally 6-10 discs, fixed in the trunk Inside, the CD disc is loaded once before driving, which avoids the inconvenience of using a single-disc CD player and frequently changing the disc during driving. The driver can choose any one of them to play according to his needs while driving. , easy to operate and does not affect driving safety, but if you want to enjoy MP3 music like using a multi-disc CD player, the current car MP3 player cannot do it, and designing a multi-disc digital car audio can solve this problem very well

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