WO2003043008A1 - Lecteur de musique numerique dote d'une fonction de cryptage - Google Patents

Lecteur de musique numerique dote d'une fonction de cryptage Download PDF

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Publication number
WO2003043008A1
WO2003043008A1 PCT/CN2002/000175 CN0200175W WO03043008A1 WO 2003043008 A1 WO2003043008 A1 WO 2003043008A1 CN 0200175 W CN0200175 W CN 0200175W WO 03043008 A1 WO03043008 A1 WO 03043008A1
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WIPO (PCT)
Prior art keywords
module
computer
bus interface
digital
music player
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PCT/CN2002/000175
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English (en)
French (fr)
Inventor
Cuyu Chang
Dongsheng Li
Original Assignee
Beijing Broadmaking Technology Development Co.,Ltd.
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Filing date
Publication date
Application filed by Beijing Broadmaking Technology Development Co.,Ltd. filed Critical Beijing Broadmaking Technology Development Co.,Ltd.
Publication of WO2003043008A1 publication Critical patent/WO2003043008A1/zh

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/16—Storage of analogue signals in digital stores using an arrangement comprising analogue/digital [A/D] converters, digital memories and digital/analogue [D/A] converters 
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G11B33/08—Insulation or absorption of undesired vibrations or sounds
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C2207/00—Indexing scheme relating to arrangements for writing information into, or reading information out from, a digital store
    • G11C2207/16—Solid state audio

Definitions

  • the invention belongs to the technical field of design of digital music players, and particularly relates to the design of digital music players based on mobile memories. Background technique
  • a general-purpose music player generally uses a magnetic tape, an optical disc, or various flash memory cards as a music storage medium. These methods of storing music all have significant shortcomings.
  • the magnetic tape has a large volume, a small capacity, is susceptible to moisture and magnetization, and has a short life. At the same time, because of its mechanical structure, the shock resistance is poor.
  • the optical disc has a large capacity, it is a read-only medium. Users must re-purchase the disc when they need to update their music. And it is also a mechanical mechanism with poor seismic resistance.
  • the new generation of music players generally use various flash cards as storage media, such as CF cards, SmartMedia cards, and MemoryStick.
  • the purpose of the present invention is to overcome the shortcomings of the existing technology, and design a new structure of digital music player with encryption function, so that it has a small size, large capacity, simple operation, strong seismic performance, The advantages of copyright protection and low cost.
  • a digital music player with encryption function designed by the present invention is a universal digital music player host composed of a microprocessor, a key input module, a liquid crystal display module, a decoding module, a digital-to-analog conversion module and a power amplifier module, in which the key input The module, the liquid crystal display module, the computer external bus interface module and the decoding module are directly connected to the micro-processing, the digital-to-analog conversion module is connected to the decoding module, and the power amplifier module is connected to the digital-to-analog conversion module. It is characterized in that-the host also includes a The computer's external bus interface module is connected to the microprocessor via a data bus and a mobile memory connected to the host computer via the computer's external bus interface module.
  • the mobile memory is a mobile memory based on a computer's external bus interface.
  • the mobile memory has processing capabilities for storing music files and can implement encryption operations.
  • the host and the mobile memory are connected via a computer's external bus interface. Connect, and use standard computer external bus protocol and mobile memory communication protocol for communication;
  • the host cooperates with the encryption function of the mobile storage to realize the functions of encryption and copy prevention;
  • the computer external bus interface may include a universal serial bus interface (USB for short), FireWire interface (for short 1394), Bluetooth interface (for short Bluetooth), and so on.
  • USB universal serial bus interface
  • FireWire interface for short 1394
  • Bluetooth interface for short Bluetooth
  • the storage medium of the mobile memory may include storage media such as flash memory (abbreviated as Flash), ferroelectric memory (abbreviated as FRAM), and dynamic memory (abbreviated as DRAM).
  • flash memory abbreviated as Flash
  • FRAM ferroelectric memory
  • DRAM dynamic memory
  • the present invention uses a computer-based external bus to use flash memory (Flash for short) or ferroelectric storage
  • flash memory Flash for short
  • ferroelectric storage A new type of mobile storage device, such as a memory device (“FRAM”), is a storage medium for music players. It has the characteristics of small size, large capacity, convenient operation, and good shock resistance;
  • the mobile memory adopts a standard computer external bus interface to connect with the host, and has the characteristics of supporting hot plugging, high transmission rate, and being able to easily exchange data with the computer;
  • the mobile memory has processing capabilities, can implement functions such as encryption and copy protection, so as to achieve copyright protection of music;
  • FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a host according to an embodiment of the present invention. detailed description
  • FIG. 1 is a general structural diagram of an embodiment of the present invention, in which a host is added on the basis of a general MP3 player.
  • the mobile memory of this embodiment uses the large-capacity mobile memory of the universal serial bus interface of the applicant's invention patent 01200990.3.
  • the mobile memory communicates with the host through the USB main mode interface module of the host Connected, the mobile memory is mainly composed of a single-chip microcomputer, a USB slave mode interface module and a chip-based storage medium, and the single-chip microcomputer runs the corresponding software to control the communication between the USB slave mode interface module and the host, read and write memory, and implement music data. Encryption and decryption algorithm.
  • the universal digital music player communicates with the mobile storage through the USB main mode interface module, and runs the encryption and decryption algorithm in conjunction with the encryption and decryption module on the mobile memory to verify the legality of the music data.
  • the data encryption method based on the mobile memory in this embodiment uses the encryption method in the applicant's invention patent 01134721. X.
  • the host structure of this embodiment is shown in FIG. 2, and is mainly composed of a microprocessor, a USB main mode interface module, a key input module, a liquid crystal display module, a decoding module, a digital-to-analog conversion module, and a power amplifier module.
  • the microprocessor uses ATMEL
  • the company's AVR microcontroller, USB main mode interface module uses Scanlogic's SL811H chip, the decoding module uses Micronas's Mas3507D chip, the digital-to-analog conversion module and power amplifier module use Micronas's integrated digital-analog conversion and power amplifier chip Mas3550A, and the input module And LCD display modules use commonly used buttons and segment LCD screens.
  • SL811H is connected to the microprocessor through an 8-bit data bus, so that the microprocessor can access the USB bus mobile memory through this interface;
  • the keys and the LCD are connected through the input and output pins of the microprocessor, respectively, and the microprocessor Controls key sampling and LCD display;
  • Mas3507D is connected to the microprocessor through the I2C bus.
  • the function of the chip is to decode the encoded music data.
  • Mas3550A is connected to the Mas3507D through the I2S bus. Its function is to decode the decoded audio stream. Perform digital-to-analog conversion and then power amplification to drive headphones or speakers.
  • USB memory and USB Mass Storage protocol are used for communication between the mobile storage and the host.
  • the general working process of this embodiment is as follows: The user can first download the music file to the mobile storage through the USB interface of the computer, and then connect the mobile storage to the USB interface of the host.
  • the microprocessor can read the music data on the mobile memory through the USB interface module; after the microprocessor obtains the music data, it uses its encryption and decryption module to verify the legality of the music data If the data is valid, the processor sends the music data to the decoding module for decoding, the decoded volume stream is then sent to the digital-to-analog conversion module and the power amplifier module for digital-to-analog conversion and power amplification, and finally to the headphones or speakers to form music.
  • the user's key input or the working status of the host can be displayed through the liquid crystal display module.

Description

W 具有加密功能的数码音乐播放机 技术领域
本发明属于数码音乐播放机的设计技术领域， 特别涉及基于移动存储器的数码音乐 播放机的设计。 背景技术
目前， 通用的音乐播放机一般采用磁带、 光盘或者各种闪存卡为音乐的存储介质。 这些存储音乐的方式均存在很大的不足。首先， 磁带体积大， 容量小， 容易受潮和磁化， 寿命短， 同时由于其为机械结构， 抗震性能差； 光盘虽然容量大， 但是为只读介质， 用 户需要更新音乐时就必须重新购买光盘， 而且其同样为机械机构， 抗震性能差； 新一代 的音乐播放器一般采用各种闪存卡为存储介质，例如 CF卡、 SmartMedia卡和 MemorySt i ck 等， 这类存储器虽然体积小、 容量大， 但是其接口标准不统一， 必须借助各种读卡器才 能读写数据， 操作复杂而且成本很高。 另外， 这些存储介质存在一个共同的不足， 均不 具备处理能力， 是一种被动的存储介质， 容易被非法复制， 难以实现音乐的版权保护。 发明内容
本发明的目的是为克服已有技术的不足之处， 设计出了一种新的具有加密功能的数 码音乐播放机的结构， 使其具有体积小， 容量大， 操作简单， 抗震性能强， 具有版权保 护功能和成本低的优点。
本发明设计的一种具有加密功能的数码音乐播放机， 由微处理器， 按键输入模块， 液晶显示模块， 解码模块， 数模转换模块和功放模块组成的通用数码音乐播放机主机， 其中按键输入模块、 液晶显示模块、 计算机外部总线接口模块和解码模块直接和微处理 相连接， 数模转换模块与解码模块连接， 功放模块与数模转换模块连接； 其特征在于- 所说的主机还包括一个计算机的外部总线接口模块， 该模块通过数据总线和所说的微处 理器连接， 以及一个通过计算机外部总线接口模块和主机相连接的移动存储器。
所说的移动存储器为基于计算机外部总线接口的移动存储器， 该移动存储器具备处 理能力， 用于存放音乐文件， 并能够实现加密操作； ' 所说的主机和移动存储器之间通过计算机的外部总线接口进行连接， 并釆用标准的 计算机外部总线协议和移动存储器通讯协议进行通讯；
该主机配合移动存储器的加密功能可以实现加密和防止拷贝的功能；
所说的计算机外部总线接口可包括通用串行总线接口 （简称 USB)、 火线接口 （简称 1394)、 蓝牙接口 (简称 Bluetooth)等。
所说的移动存储器的存储介质可包括闪速存储器（简称 Flash)、铁电存储器（简称 FRAM)、 动态存储器（简称 DRAM)等存储介质。
本发明的特点：
1、 本发明采用基于计算机外部总线的、 以闪速存储器（简称 Flash)或者铁电存储 器'（简称 FRAM) 等芯片存储介质为存储器的新型移动存储器为音乐播放机的存储介质， 具有体积小， 容量大， 操作方便， 抗震性好的特点；
2、移动存储器采用标准的计算机外部总线接口和主机相连接， 具有支持热插拔，传 输速率高， 能够方便的和计算机设各交换数据的特点；
• 3、移动存储器通用性好，既能够存储音乐文件，也能够存储普通的计算机数据文件；
4、移动存储器具备处理能力， 能够实现加密和防止拷贝等功能，从而可以实现音乐 的版权保护； 附图说明
图 1为本发明实施例的总体结构示意图。
图 2为本发明实施例的主机结构示意图。 具体实施方式
本发明所提出的一种具有加密功能的数码音乐播放机的实施例结合附图 1、 2说明如 图 1为本发明实施例的总体结构图， 其中主机在通用的 MP3播放机基础上增设了一 个 USB主模式的接口模块； 本实施例的移动存储器采用本申请人的发明专利 01200990. 3 中的通用串行总线接口的大容量移动存储器； 该移动存储器通过主机的 USB主模式接口 模块与主机相连， 所说的移动存储器主要由单片机、 USB从模式接口模块和基于芯片的 存储介质构成， 由单片机运行相应的软件来控制 USB从模式接口模块与主机的通讯、 读 写存储器和实现音乐数据的加密解密算法。 该通用数码音乐播放机通过 USB主模式接口 模块与移动储器通讯， 并通过运行加密解密算法， 配合移动存储器端的加密解密模块来 进行音乐数据的合法性验证。
本实施例的基于移动存储器的数据加密方法采用本申请人的发明专利 01134721. X 中的加密方法。
本实施例的主机结构如图 2所示， 主要由微处理器、 USB主模式接口模块、 按键输 入模块、 液晶显示模块、 解码模块、 数模转换模块和功放模块组成， 其中微处理器采用 ATMEL公司的 AVR单片机， USB主模式接口模块采用 Scanlogic公司的 SL811H芯片， 解 码模块采用 Micronas公司的 Mas3507D芯片，数模转换模块和功放模块采用 Micronas公 司集成了数模转换和功放的芯片 Mas3550A， 而输入模块和液晶显示模块分别采用常用的 按键和段式液晶屏。 其中， SL811H通过 8位的数据总线和微处理器相连， 使微处理器通 过该接口能够访问 USB总线的移动存储器； 按键和液晶显示分别通过微处理器的输入输 出管脚连接， 由微处理器控制进行按键采样和液晶显示； Mas3507D则通过 I2C总线和微 处理器连接， 该芯片的功能是将编码好的音乐数据进行解码； Mas3550A通过 I2S总线和 Mas3507D连接， 其功能是将解码后的音频流进行数模转换， 然后进行功率放大， 以驱动 耳机或者音箱。
移动存储器和主机之间采用 USB协议和 USB Mass Storage协议进行通讯。 本实施例的一般工作过程如下： 用户首先可以通过计算机的 USB接口向移动存储器 下载音乐文件， 然后再将移动存储器接入所说主机的 USB接口。 当用户通过按键输入模 块输入播放的命令后，微处理器通过 USB接口模块就可以读取移动存储器上的音乐数据； 微处理器获取音乐数据后， 通过其加密解密模块来验证音乐数据的合法性， 如果数据合 法， 徼处理器就将音乐数据送入解码模块进行解码， 解码后的音量流再送入数模转换模 块和功放模块进行数模转换和功率放大， 最后送入耳机或者音箱形成音乐。 用户的按键 输入或者主机的工作状态均可以通过液晶显示模块进行显示。

Claims

权 利 要 求 书
1、一种具有加密功能的数码音乐播放机， 由微处理器， 按键输入模块， 液晶显示模 块， 解码模块， 数模转换模块和功放模块组成的通用数码音乐播放机主机， 其中按键输 入模块、 液晶显示模块、 计算机外部总线接口模块和解码模块直接和微处理相连接， 数 模转换模块与解码模块连接， 功放模块与数模转换模块连接； 其特征在于： 所说的主机 还包括一个计算机的外部总线接口模块， 该模块通过数据总线和所说的微处理器连接， 以及一个通过计算机外部总线接口模块和主机相连接的移动存储器。
2、如权利要求 1所述的具有加密功能的数码音乐播放机， 其特征在于，所说的计算 机外部总线接口包括通用串行总线接口、 火线接口、 蓝牙接口。
3、 如权利要求 1所述的一种具有加密功能的数码音乐播放机的设计， 其特征在于， 所说的移动存储器的存储介质包括闪速存储器、 铁电存储器、 动态存储器。
PCT/CN2002/000175 2001-11-16 2002-03-19 Lecteur de musique numerique dote d'une fonction de cryptage WO2003043008A1 (fr)

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CN01270949U CN2510963Y (zh) 2001-11-16 2001-11-16 具有加密功能的数码音乐播放机
CN01270949.2 2001-11-16

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0957489A1 (en) * 1998-05-11 1999-11-17 Van de Pol, Teun Portable device and method to record, edit and playback digital audio
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EP1102172A1 (en) * 1999-11-22 2001-05-23 Yao, Li-ho Dual interface memory card and adapter module for the same
CN2463878Y (zh) * 2001-01-12 2001-12-05 北京先锋博创科技发展有限公司 通用串行总线接口的大容量移动存储器

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Publication number Priority date Publication date Assignee Title
EP0957489A1 (en) * 1998-05-11 1999-11-17 Van de Pol, Teun Portable device and method to record, edit and playback digital audio
KR20010026378A (ko) * 1999-09-06 2001-04-06 윤종용 유.에스.비 인터페이스 기능을 구비한 엠피3 플레이어 시스템
EP1102172A1 (en) * 1999-11-22 2001-05-23 Yao, Li-ho Dual interface memory card and adapter module for the same
CN2463878Y (zh) * 2001-01-12 2001-12-05 北京先锋博创科技发展有限公司 通用串行总线接口的大容量移动存储器

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