CN2510963Y

CN2510963Y - Digital music playing machine with encrypting function

Info

Publication number: CN2510963Y
Application number: CN01270949U
Authority: CN
Inventors: 常促宇; 李东生
Original assignee: XIANFENG BOCHUANG SCINECE & TECHNOLOGY DEVELOPMENT Co Ltd BEIJING
Current assignee: XIANFENG BOCHUANG SCINECE & TECHNOLOGY DEVELOPMENT Co Ltd BEIJING
Priority date: 2001-11-16
Filing date: 2001-11-16
Publication date: 2002-09-11
Anticipated expiration: 2011-11-16
Also published as: WO2003043008A1

Abstract

The utility model relates to a digital music playing host machine with an encrypting function, which belongs to the technical field of the digital music player designing. The utility model is composed of a microprocessor, a key inputting module, a liquid crystal display module, a decoding module and a digital-to-analog converting module and a power amplifier module, wherein the key inputting module, the liquid crystal display module, a computer external bus interface module and a decoding module are directly connected with the microprocessor. The digital-to-analog converting module is connected with the decoding module, and the power amplifier module is connected with the digital-to-analog converting module. The utility model is characterized in that the host machine also comprises an external bus interface module of a computer and a movable memory, wherein the external bus interface module of the computer is connected with the microprocessor through a data bus, and the movable memory is connected with the host machine through the external bus interface module of the computer. The utility model has the advantages of small volume, large capacity, simple operation, strong shock resistance performance, copyright protection functions and low cost.

Description

Digital music player with encryption function

Technical field

The utility model belongs to the design field of digital music player, particularly based on the design of the digital music player of mobile memory.

Background technology

At present, generally to adopt tape, CD or various flash card be the storage medium of music for general music player.All there is very big deficiency in the mode of these storage music.At first, the tape volume is big, and capacity is little, makes moist easily and magnetizes, and the life-span is short, simultaneously because it is a physical construction, and poor seismic behavior; Though the CD capacity is big, be read-only medium, just must buy CD again when the user need upgrade music, and it is similarly mechanical mechanism, poor seismic behavior; The various flash cards of the general employing of the music player of a new generation are storage medium, for example CF card, SmartMedia card and MemoryStick etc., though this class storer volume is little, capacity is big, but its interface standard disunity, must just can read and write data by various card reader, complicated operation and cost are very high.In addition, there is a common deficiency in these storage mediums, all do not possess processing power, are a kind of passive storage mediums, easily by bootlegging, are difficult to realize the copyright protection of music.

Summary of the invention

The purpose of this utility model is for overcoming the weak point of prior art, has designed a kind of structure of the new digital music player with encryption function, and it is little to make it have a volume; capacity is big; simple to operate, anti-seismic performance is strong, has the low advantage of copyright protection function and cost.

A kind of digital music player of the utility model design with encryption function, by microprocessor, keyboard input module, LCD MODULE, decoder module, the universal digital music machine host that D/A converter module and power amplifier module are formed, wherein direct and little processing is connected with decoder module for keyboard input module, LCD MODULE, computing machine external bus interface module, D/A converter module is connected with decoder module, and power amplifier module is connected with D/A converter module; It is characterized in that: said main frame also comprises the external bus interface module of a computing machine, and this module is connected with said microprocessor by data bus, and a mobile memory that is connected with main frame by computing machine external bus interface module.

Said mobile memory is the mobile memory based on the computing machine external bus interface, and this mobile memory possesses processing power, is used to deposit music file, and can realize cryptographic operation;

External bus interface by computing machine between said main frame and the mobile memory connects, and the computing machine external bus protocol and the mobile memory communications protocol of the standard of employing are carried out communication;

This main frame cooperates the encryption function of mobile memory can realize the function of encrypting and preventing to copy;

Said computing machine external bus interface can comprise USB (universal serial bus) (being called for short USB), fire-wire interfaces (being called for short 1394), blue tooth interface (being called for short Bluetooth) etc.

The storage medium of said mobile memory can comprise flash memory (being called for short Flash), ferroelectric memory (being called for short FRAM), dynamic storage storage mediums such as (being called for short DRAM).

Characteristics of the present utility model:

1, the utility model adopt based on the computing machine external bus, be that the novel mobile memory of storer is the storage medium of music player with flash memory (being called for short Flash) or ferroelectric memory chip-stored media such as (being called for short FRAM), it is little to have volume, capacity is big, the characteristics easy to operate, that shock resistance is good;

2, mobile memory adopts the computing machine external bus interface of standard to be connected with main frame, has the support hot plug, and the transfer rate height can be easily and the characteristics of computer equipment swap data;

3, the mobile memory versatility is good, can either store music file, also can store common computer data file;

4, mobile memory possesses processing power, can realize encrypting and prevents function such as copy, thereby can realize the copyright protection of music;

Description of drawings

Fig. 1 is the general structure synoptic diagram of the utility model embodiment.

Fig. 2 is the main machine structure synoptic diagram of the utility model embodiment.

Embodiment

A kind of embodiment with digital music player of encryption function that the utility model proposed 1,2 is described as follows in conjunction with the accompanying drawings:

Fig. 1 is the overall construction drawing of the utility model embodiment, and wherein main frame has been set up the interface module of a USB holotype on general MP3 player basis; The high capacity mobile memory of the USB (universal serial bus) in mobile memory employing the applicant's of present embodiment the utility model patent 01200990.3; This mobile memory links to each other with main frame by the USB holotype interface module of main frame, said mobile memory mainly is made of from mode interface module with based on the storage medium of chip single-chip microcomputer, USB, moves corresponding software by single-chip microcomputer and controls the encrypting and decrypting algorithm of USB from communication, read-write memory and the realization music data of mode interface module and main frame.This universal digital music player is by USB holotype interface module and mobile reservoir communication, and by operation encrypting and decrypting algorithm, the encrypting and decrypting module of cooperation mobile memory end is carried out the legitimate verification of music data.

Present embodiment adopt encryption method among the applicant's the patent of invention 01134721.X based on the data ciphering method of mobile memory.

The main machine structure of present embodiment as shown in Figure 2, mainly by microprocessor, USB holotype interface module, keyboard input module, LCD MODULE, decoder module, D/A converter module and power amplifier module are formed, wherein microprocessor adopts the AVR single-chip microcomputer of atmel corp, USB holotype interface module adopts the SL811H chip of Scanlogic company, decoder module adopts the Mas3507D chip of Micronas company, D/A converter module and power amplifier module adopt Micronas company integrated the chip Mas3550A of digital-to-analog conversion and power amplifier, and load module and LCD MODULE adopt button commonly used and segmentation liquid crystal display respectively.Wherein, SL811H links to each other with microprocessor by 8 data bus, makes microprocessor pass through the mobile memory that this interface can be visited usb bus; Button is connected by the input and output pin of microprocessor respectively with liquid crystal display, by microprocessor control carrying out button sampling and liquid crystal display; Mas3507D then is connected with microprocessor by the I2C bus, and the function of this chip is that the music data that encodes is decoded; Mas3550A is connected with Mas3507D by the I2S bus, and its function is that decoded audio stream is carried out digital-to-analog conversion, carries out power amplification then, to drive earphone or audio amplifier.

Adopt usb protocol and USB Mass Storage agreement to carry out communication between mobile memory and the main frame.

The general work process of present embodiment is as follows: the user at first can be by USB interface of computer to the mobile memory download music files, and then mobile memory is inserted the USB interface of said main frame.After the order that the user plays by keyboard input module input, microprocessor just can read music data on the mobile memory by usb interface module; After microprocessor obtains music data, verify the legitimacy of music data by its encrypting and decrypting module, if data are legal, microprocessor is just sent music data into decoder module and is decoded, decoded volume stream sends into D/A converter module again and power amplifier module carries out digital-to-analog conversion and power amplification, sends into earphone or audio amplifier at last and form music.User's the button input or the duty of main frame all can show by LCD MODULE.

Claims

1, a kind of digital music player with encryption function, by microprocessor, keyboard input module, LCD MODULE, decoder module, the universal digital music machine host that D/A converter module and power amplifier module are formed, wherein direct and little processing is connected with decoder module for keyboard input module, LCD MODULE, computing machine external bus interface module, D/A converter module is connected with decoder module, and power amplifier module is connected with D/A converter module; It is characterized in that: said main frame also comprises the external bus interface module of a computing machine, and this module is connected with said microprocessor by data bus, and a mobile memory that is connected with main frame by computing machine external bus interface module.

2, the digital music player with encryption function as claimed in claim 1 is characterized in that, said computing machine external bus interface comprises USB (universal serial bus), fire-wire interfaces, blue tooth interface.

3, a kind of digital music player with encryption function as claimed in claim 1 is characterized in that the storage medium of said mobile memory comprises flash memory, ferroelectric memory, dynamic storage.