CN102098284A - Digital media adapter and conversion method - Google Patents

Digital media adapter and conversion method Download PDF

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Publication number
CN102098284A
CN102098284A CN 201010592404 CN201010592404A CN102098284A CN 102098284 A CN102098284 A CN 102098284A CN 201010592404 CN201010592404 CN 201010592404 CN 201010592404 A CN201010592404 A CN 201010592404A CN 102098284 A CN102098284 A CN 102098284A
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module
conversion
digital
audio
media
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CN 201010592404
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Chinese (zh)
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饶鹏
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深圳市和宏实业有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/08Network architectures or network communication protocols for network security for supporting authentication of entities communicating through a packet data network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements or protocols for real-time communications
    • H04L65/60Media handling, encoding, streaming or conversion
    • H04L65/601Media manipulation, adaptation or conversion
    • H04L65/605Media manipulation, adaptation or conversion intermediate

Abstract

The embodiment of the invention discloses a digital media adapter and a conversion method, which are used for completing switching from a portable audio/video player to high-definition multimedia interface (HDMI) equipment. In method in the embodiment of the invention, a media activation module, an image conversion module, an audio conversion module, an output conversion module and a control module are provided, wherein the media activation module is used for transmitting an authentication command to a media terminal; the audio conversion module is used for converting an analogue audio signal into a digital audio signal; the image conversion module is used for converting an analogue image signal to a digital image signal; the output conversion module is used for uniformly converting the obtained digital audio signal and digital image signal into digital video signals and outputting the digital video signals; and the control module is used for transmitting a control command to the audio conversion module, the image conversion module and the output conversion module. Moreover, the invention also provides an implementation method of the digital media adapter.

Description

一种数字媒体适配器以及转换方法 A digital media adapters, and conversion method

技术领域 FIELD

[0001] 本发明涉及电子领域,尤其涉及一种数字媒体适配器以及转换方法; 背景技术 [0001] The present invention relates to the field of electronics, in particular to a conversion method and a digital media adapter; BACKGROUND

[0002] 在市场上,便携式的音频播放器和视频播放器(也就是俗称的MP3和MP4播放器)都非常的流行,几乎年轻人娱乐休闲的必备之选;而苹果APPLE公司生产的便携式的音频播放器和视频播放器,无论从质量、外观还是科技含量的角度考虑,都是市场上的首选, 2001-2008年APPLE音视频数码产品全球销售达到2亿多部,占有很大的市场份额。 [0002] in the market, portable audio players and video players (also known as MP3 and MP4 players) are very popular, youth recreation almost essential choice; Apple APPLE company's portable audio player and video player, both in terms of quality, appearance or tech consideration, are the first choice on the market, from 2001 to 2008 APPLE global sales of digital audio and video products to more than 200 million, a large market share.

[0003]高清晰度多媒体接口(HDMI,High Definition Multimedia Interface),是一种全数位化影像和声音传送接口,可以传送无压缩的音频信号及视频信号。 [0003] High-Definition Multimedia Interface (HDMI, High Definition Multimedia Interface), is an all-digital video and audio transmission interface for transmitting audio and video signals uncompressed. HDMI技术可应用于DVD播放机、个人电脑、机顶盒、数位音响与电视机等领域。 HDMI technology can be used in DVD players, personal computers, set-top boxes, digital audio and TV and other fields. HDMI可以同时传送音频和视频信号,由于音频和视频信号采用同一条电缆,大大简化了播放设备的系统结构。 HDMI can transmit audio and video signals, since the audio and video signals using the same cable, greatly simplifying the system structure of the playback apparatus. 随着科学技术的发展,HDMI技术也变得越来越普及,并受到各种电子产品的大力追捧,HDMI相关产品的市场扩张已经成为了一种趋势。 With the development of science and technology, HDMI technology has become increasingly popular, and vigorously sought after variety of electronic products, market expansion HDMI related products has become a trend.

[0004] 结合上述两种技术的发展,市场上出现了这样一种用户需求_将APPLE音视频数码产品的媒体流转接到HDMI设备上播放。 [0004] with the development of both technologies, there has been a user needs on the market _ the media APPLE digital audio and video products, transfer to the player on the HDMI device.

[0005] 在现有技术中,由于APPLE数码产品并没有设计HDMI接口,若需要对APPLE数码产品的媒体流进行转接到HDMI设备上播放,需要搭配各种转换配件进行转接,过程非常繁琐。 [0005] In the prior art, because the product is not designed APPLE digital HDMI interface, if the need for digital products APPLE media stream player transferred to HDMI equipment, it is necessary with a variety of accessories for the conversion adapter, the process is very cumbersome . 例如:需要配备APPLE数码产品专用的音视频组合线(APPLE to AV cable), RGB TO HDMI转换器和外置电源,将APPLEto AV cable的一端与APPLE数码产品相连,另一端分别接入RGB TO HDMI转换器的音频信号输入端口和视频信号输入端口,然后在通过RGB TO HDMI转换器的HDMI输出端向HDMI设备输出音频或视频信号。 For example: APPLE required with digital audio and video products for combined line (APPLE to AV cable), RGB TO HDMI converter and external power supply, connecting one end of APPLEto AV cable APPLE digital product, and the other end respectively connected RGB TO HDMI converter input audio signal and a video signal input port of the port, and then outputs the signal to the HDMI audio or video device through the HDMI output terminal RGB tO HDMI converter. 由于转接过程复杂,导致了用户的不便。 Since the switching process is complex, resulting in inconvenience to the user.

发明内容 SUMMARY

[0006] 本发明实施例提供了一种数字媒体适配器以及转换方法,用于便捷的完成便携式音频视频播放器到HDMI设备的转接。 Embodiment [0006] The present invention provides a method of converting digital media adapters, and for convenience the completion of the portable audio player into the video adapter HDMI device.

[0007] 本发明提供的数字媒体适配器,包括:媒体激活模块,图像转换模块,音频转换模块,输出转换模块以及控制模块;所述媒体激活模块用于向媒体终端发送认证指令,使得所述媒体终端分别向音频转换模块和图像转换模块发送模拟音频信号和模拟图像信号;所述音频转换模块用于通过媒体激活模块获取所述媒体终端发送的模拟音频信号,将所述模拟音频信号转换为数字音频信号,并向输出转换模块输出所述数字音频信号;所述图像转换模块用于通过媒体激活模块获取所述媒体终端发送的模拟图像信号,将所述模拟图像信号转换为数字图像信号,并向输出转换模块输出所述数字图像信号;所述输出转换模块用于将获取到的数字音频信号和数字图像信号统一转换成数字视频信号,并输出所述数字视频信号;所述控制模块用于分别向所述音频转换模 [0007] The present invention provides a digital media adapter, comprising: a media activation module, an image conversion module, an audio conversion module converts the output module and a control module; activation module configured to send the media to the media terminal authentication instruction, such that the media terminal are transmitted analog audio signal and an analog image signal to the audio conversion module and the image conversion module; said audio transducer module is configured to acquire the analog audio signal sent from the terminal through the media media activation module, the analog audio signal into a digital audio signal, and outputs the output module converts the digital audio signal; the image conversion module for acquiring an analog image signal sent from the media terminal through the media activation module, the analog image signal into a digital image signal, and output conversion module to output the digital image signal; means for converting the output of the acquired digital audio signal and the digital image signal into a digital video signal is unity, and outputs said digital video signal; and the control means for are converted to the analog audio 块、图像转换模块和输出转换模块发送控制指令,控制信号转换的流程。 Block, and outputs the converted image conversion module transmits a control command module, the control signal conversion process.

[0008] 本发明提供的数字媒体转换方法,包括:向媒体终端发送认证指令,使得所述媒体终端可以向数字媒体适配器发送模拟信号,所述模拟信号包括模拟音频信号和模拟图像信号;分别获取媒体终端发送的模拟音频信号和模拟图像信号;将所述模拟音频信号和模拟图像信号分别转换为数字音频信号和数字图像信号;将所述数字音频信号和数字图像信号统一转换成数字视频信号,并输出所述数字视频信号。 [0008] converting the digital media of the present invention provides a method, comprising: transmitting authentication instruction to the media terminal, such that the media terminal may send an analog signal to a digital media adapter, said analog signal comprises an analog audio signal and an analog image signal; obtaining respectively an analog audio signal and analog image signal transmitted from the media terminal; the analog audio signal and analog image signals are converted into a digital audio signal and digital image signal; unified digital audio signal and converting the digital image signal into a digital video signal, and outputting said digital video signals.

[0009] 从以上技术方案可以看出,本发明实施例具有以下优点:本发明的数字媒体适配器集成了媒体激活模块,图像转换模块,音频转换模块,输出转换模块以及控制模块,上述5 个模块都焊接在一个PCB板,PCB板与外部主体外壳之间只有一个数据传输接口,媒体终端可以直接插入该数据传输接口与本发明的数字媒体适配器相连接,则媒体文件信号转换的过程就可以一体化完成,非常的方便和快捷。 [0009] As can be seen from the foregoing technical solutions, embodiments of the present invention has the following advantages: a digital media adapter of the invention incorporates a media activation module, an image conversion module, an audio conversion module, an output module and a control module converts the five modules welding only have a data transfer interface, the media terminal can be inserted into the data transfer interface of the present invention is directly between a PCB board, PCB board housing and the outer body is connected to the digital media adapter, the signal conversion process media file can be integrally It is complete, very convenient and fast.

附图说明 BRIEF DESCRIPTION

[0010] 图1是本发明实施例中数字媒体适配器的一个逻辑结构示意图; [0010] FIG. 1 is a schematic structural diagram of a digital media adapter of the embodiment of the present invention;

[0011] 图2是本发明实施例中数字媒体适配器另一个逻辑结构示意图; [0011] FIG. 2 is a schematic diagram of the logical structure of another embodiment of the present invention, the digital media adapter embodiment;

[0012] 图3是本发明实施例中数字媒体适配器的实物示意图; [0012] FIG. 3 is a schematic view of the physical embodiment of the digital media adapter embodiment of the present invention;

[0013] 图4是本发明实施例中数字媒体适配器与媒体终端相连接后的示意图; [0013] FIG. 4 is a schematic view of the embodiment of the digital media and media terminal adapter is connected to embodiments of the present invention;

[0014] 图5是本发明实施例中数字媒体转换方法一个流程示意图。 [0014] FIG. 5 is a diagram of a digital media conversion method a schematic flow diagram embodiment of the present invention.

具体实施方式 detailed description

[0015] 本发明实施例提供了一种数字媒体适配器以及转换方法,用于便捷的完成便携式音频视频播放器到HDMI设备的转接。 Embodiment [0015] The present invention provides a method of converting digital media adapters, and for convenience the completion of the portable audio player into the video adapter HDMI device.

[0016] 请参阅图1,本发明实施例中数字媒体适配器的一个实施例包括: [0016] Referring to FIG. 1, the embodiment of the present invention, the digital media adapter according to one embodiment includes:

[0017] 媒体激活模块101,音频转换模块102,图像转换模块103,输出转换模块104以及控制模块105 ; [0017] The media activation module 101, an audio conversion module 102, the image conversion module 103, the output of conversion module 104 and a control module 105;

[0018] 媒体激活模块101用于向媒体终端发送一条认证指令,使得该媒体终端分别向音频转换模块102和图像转换模块103发送模拟音频信号和模拟图像信号; [0018] The transmission medium 101 to activate the analog audio signal and an analog image signal 103 means for transmitting a terminal authentication instruction to the media so that the media terminal to the audio conversion module 102, respectively, and the image conversion module;

[0019] 音频转换模块102用于通过媒体激活模块101获取该媒体终端发送的模拟音频信号,将模拟音频信号转换为数字音频信号,并向输出转换模块104输出该数字音频信号; [0019] The audio conversion module 102 through the media activation module 101 acquires an analog audio signal transmitted from the media terminal, analog audio signal into a digital audio signal, outputs the digital audio signal and outputs the conversion module 104;

[0020] 图像转换模块103用于通过媒体激活模块101获取该媒体终端发送的模拟图像信号,将模拟图像信号转换为数字图像信号,并向输出转换模块104输出该数字图像信号; [0020] The image conversion module 103 is used by a media activation module 101 acquires an analog image signal transmitted from the media terminal, the analog image signal into a digital image signal, and outputs the conversion module 104 outputs the digital image signal;

[0021] 输出转换模块104用于将获取到的数字音频信号和数字图像信号统一转换成数字视频信号,并输出该数字视频信号,该数字视频信号可以为最小化传输差分信号(TMDS, Transition Minimized Differential Signaling); [0021] The digital audio signal and outputs the digital image signal conversion module 104 for converting the acquired unified into a digital video signal and outputting the digital video signal, the digital video signal may be a transition minimized differential signaling (TMDS, Transition Minimized Differential Signaling);

[0022] 控制模块105用于分别向音频转换模块102、图像转换模块103和输出转换模块104发送控制指令,控制模块105通过指令和时钟电路控制信号转换的整个过程,包括:控制转换的速率,使得音频和视频的转换同步;控制信号的缓存,调整缓存输出;控制信号转换的开始和结束等。 [0022] The control module 105 respectively to the audio conversion module 102, the image conversion module 103 and an output conversion module 104 sends a control instruction 105 to control the entire process by instructing the control signal converting circuit and the clock module comprising: a control rate conversion, converting such audio and video synchronization; buffer control signal, adjust an output buffer; control signal into the start and end the like.

[0023] 本发明实施例中数字媒体适配器的各个单元具体的交互过程如下:[0024] 当媒体终端接入数字媒体适配器之后,媒体激活模块101判断与媒体终端之间的电路是否导通,若是,则向媒体终端发送一条认证指令,打开媒体终端的媒体输出端口,使得媒体终端分别向音频转换模块和图像转换模块发送模拟音频信号和模拟图像信号。 Specific interaction of the respective units [0023] Example embodiments of the present invention, digital media adapters as follows: [0024] When the media terminal access digital media adapter, the circuit between the media and the media activation module 101 determines whether the terminal is turned on, if , sending an authentication command to the media terminal, media terminal opens a media output port, respectively, such that the media terminal transmitting an analog audio signal and an analog image signal to the audio conversion module and the image conversion module. 该认证指令用于激活媒体终端的中央处理器(CPU,Central Processing Unit),如:若该媒体终端为iphone手机,则该认证指令为附件测试系统(ATS,Accessory Test System)指令。 A central processing unit (CPU, Central Processing Unit) instructions for activating the authentication medium of the terminal, such as: if the terminal is a media iphone mobile phone, the accessory authentication instruction to the test system (ATS, Accessory Test System) command.

[0025] 由于在模拟信号的传输中,媒体数据的音频信号和图像信号是分开的,因此,当媒体终端的媒体输出端口打开后,控制模块105会分别向音频转换模块102和图像转换模块103发送控制指令,使得音频转换模块102和图像转换模块103分别获取媒体终端发送的模拟音频信号和模拟图像信号,并对将模拟音频信号和模拟图像信号转换为数字音频信号和数字图像信号。 [0025] Since the transmission of analog signals, the audio signal and an image signal media data are separated, and therefore, when the media output ports of the media terminal is opened, the control module 105 will respectively to the audio conversion module 102, and an image conversion module 103 send control commands, such that the audio conversion module 102, and an image conversion module 103 respectively acquire the analog audio signal and analog image signal transmitted from the media terminal, and the analog audio signal and analog image signal into a digital audio signal and digital image signal. 该模拟图像信号可以为RGB图像信号以及复合视频信号(YPbPr),该数字图像信号可以为YUV数字信号。 The analog image signal may be a RGB image signal and the composite video signal (YPbPr), the digital image signal may be a YUV digital signal.

[0026] 当媒体终端向音频转换模块102和图像转换模块103传输模拟信号时,控制模块105向媒体激活模块101获取该模拟信号的信息(如整个媒体文件的大小),分别向音频转换模块102和图像转换模块103发送控制指令触发这两个模块开始进行信号转换,并根据媒体文件的大小指示:当完成第几帧信号转换时,结束信号转换。 [0026] When the media terminal to the audio conversion module 102, and an image conversion module 103 to transmit analog signals, the control module 105 acquires information (such as the size of the entire media file) of the analog signal to the media activation module 101, respectively, to the audio conversion module 102 and an image conversion module 103 sends a control command triggering two modules start signal conversion, and instructs the media depending on the size of file: upon completion of the first few frames of signal conversion, the conversion end signal. 音频转换模块102和图像转换模块103转换模拟信号的时钟频率也是由控制模块105决定。 Clock frequency of the audio conversion module 102, and an image conversion module 103 converts the analog signals is also determined by the control module 105.

[0027] 经音频转换模块102和图像转换模块103转换后的信号输入到输出转换模块104 后,输出转换模块104向控制模块105反馈当前状态,控制模块105向输出转换模块104发送格式转换的控制指令,指示输出转换模块104视频信号转换的播放码率以及分辨率。 [0027] via the signal input after 103 converts the audio conversion module 102 and the image conversion module to the output of conversion module 104, the output conversion module 104 feedback current state to the control module 105, control the transmission format converter to the output conversion module 104 module 105 instruction indicating the output conversion module 104 converts the video signal of the playback rate and resolution. 由于本发明需要向HMDI设备输出媒体信号,所以输出转换模块104在向HMDI设备输出媒体信号前,统一将数字音频信号和数字图像信号转换成为TMDS信号。 Since the present invention requires HMDI device to output media signals, the output of conversion module 104 in the device to output media signals before HMDI unified digital audio signal and digital image signal into a TMDS signal.

[0028] 当输出转换模块104将数字视频信号转换完成后,则可以将该数字视频信号通过HDMI端口输出到HDMI设备中播放。 [0028] When the conversion module 104 outputs the digital video signal conversion is completed, to the HDMI output device can play the digital video signal through the HDMI port.

[0029] 本发明的数字媒体适配器集成了媒体激活模块,图像转换模块,音频转换模块,输出转换模块以及控制模块,在媒体激活模块激活了媒体终端以后,由控制模块统一控制图像转换模块、音频转换模块和输出转换模块,使得图像转换模块和音频转换模块分别将获取到的模拟图像信号和模拟音频信号转换为数字图像信号和数字音频信号,然后输出转换模块再将数字图像信号和数字音频信号统一的转换为数字视频信号,并向HDMI设备输出该数字视频信号。 [0029] Digital media adapter of the present invention integrates a media activation module, an image conversion module, an audio conversion module, an output conversion module and a control module, the media activation module activates the media terminal later, by the control module collectively controls the image conversion module, an audio and an output conversion module converting module, so that the image and audio conversion module converting module respectively to obtain an analog image signal and analog audio signal into a digital image signal and a digital audio signal, and then outputs the digital image signal conversion module and a digital audio signal unified into a digital video signal, and outputs the digital video signal from the HDMI device. 媒体终端直接插入本发明的数字媒体适配器后,整个媒体转换的过程一体化完成,非常的方便和快捷。 After the media directly into the digital media terminal adapter of the present invention, the entire integrated media conversion process is completed, very convenient and fast.

[0030] 为了便于理解,下面以一具体的实施例对本发明数字媒体适配器再进行详细描述,请参考图2,具体为: [0030] For ease of understanding, the following a specific embodiment of the present invention, digital media adapter further described in detail, referring to FIG 2, in particular:

[0031] 本发明实施例中的数字媒体适配器还可以包括: [0031] Examples of the digital media adapter may further embodiment of the present invention comprises:

[0032] 遥控器201和电源输出模块202 ; [0032] The remote controller 201 and a power output module 202;

[0033] 本发明的媒体激活模块203还可以外接上红外信号接收模块,当遥控器通过红外光信号向媒体激活模块203发送操作指令时,媒体激活模块203根据该操作指令进行相应的操作;本发明的遥控器主要是触发媒体激活模块203向媒体终端发送一条认证指令,并间接控制媒体终端的音频和视频模拟信号的发送。 [0033] The media of the present invention, the activation module 203 may also add the infrared signal receiving module when the remote activation module 203 sends an operation instruction to the media by an infrared light signal, the media activation module 203 performs a corresponding operation according to the operation instruction; present the invention is mainly remote control to trigger the activation module 203 sends a media authentication instruction to the media terminal, and indirectly control the audio and video analog signals of the transmission media terminal.

[0034] 上述遥控器201与媒体激活模块203的通信渠道可以是物理电路连接,可以红外光传输,也可以是其它电磁波信号的收发渠道,此处具体不作限定。 [0034] The remote controller 201 activates a communication channel with a media module 203 may be a physical circuit connections, infrared light can be transmitted, the transceiver may be other sources of electromagnetic signals, in particular is not limited herein.

[0035] 媒体激活模块203是一种集成的微控制单元(MCU,Micro ControlIerUnit),当媒体激活模块203激活了媒体终端后,媒体终端通过该MCU向音频转换模块204和图像转换模块205传输媒体文件的模拟信号,该MCU上可以外接时钟电路、片外存储器,负责在媒体终端与音频转换模块204或图像转换模块205之间传输和缓存该模拟信号;该MCU还可以外接复位电路,当模拟信号的传输发生错误时,可以自动或被动复位。 [0035] The media activation module 203 is an integrated micro control unit (MCU, Micro ControlIerUnit), when the media activation module 203 activates the media terminal, media terminal to the MCU through the audio conversion module 204, and image conversion module 205 transmission media outer file analog signal, a clock can be external to the MCU circuit, memory chip, and is responsible for the transmission between the buffer 205 the analog audio signal terminal and the media conversion module 204 or the image conversion module; the MCU also be an external reset circuit, when an analog when a transmission signal error can be reset automatically or passively.

[0036] 当媒体终端被激活后,电源输出模块202通过媒体终端与本发明数字媒体适配器之间的数据连接端口向输出电流,为媒体终端充电。 [0036] When the media terminal is activated, the power output module 202 is connected between the data terminal and the media of the present invention the digital media adapter port, the charging current to the output terminal for the media. 电压输出模块202可以包含电压适配电路,将向媒体终端输出的电流调节为该媒体终端的额定电流。 Voltage output module 202 may comprise a voltage adaptation circuit, the output current will be adjusted for the media terminal rated current media terminal.

[0037] 控制单元207也是一种MCU ;本发明能够同时转换音频和图像信号取决于3种工作周期的模式:1、控制周期,用于引导信息的发送,同时也与信号输出端的字符同步;2、视频周期,用于发送有效视频行的像素;3、数据周期,用于传输音频信号。 [0037] The control unit 207 is a kind of the MCU; the present invention can simultaneously convert the audio and image signals depending on the duty cycle of the three modes: one control period, for guiding the transmission information, but also with the synchronizing character signal output terminal; 2, the video period, for transmitting the pixel of active video lines; 3, a data period, for transmission of audio signals. 控制单元207通过发送控制指令来完成这3种工作周期的控制过程。 The control unit 207 sends control instructions to complete the control procedure of the duty cycle of these three.

[0038] 当媒体终端向音频转换模块204和图像转换模块205传输模拟信号之后,控制模块207分别向音频转换模块204和图像转换模块205发送控制指令触发这两个模块开始进行信号转换。 [0038] When the media terminal to the audio conversion module 204 and the image conversion module 205 to transmit analog signals, the control module 207 to the audio conversion module 204, and image conversion module 205 sends a control command triggering two modules start signal conversion.

[0039] 音频转换模块204可以使用脉码调制(PCM,Pulse Code Modulation)的方法将模拟音频信号量化为数字音频信号,即让模拟音频信号的不同幅度分别对应不同的二进制数,例如采用8位编码可将模拟音频信号量化为256 (2的8次方)个量级,实用中常采取24 位或30位编码。 [0039] The audio conversion module 204 may use pulse code modulation (PCM, Pulse Code Modulation) method of the analog audio signal is quantized into a digital audio signal, i.e., so that different amplitude of the analog audio signals corresponding to different binary number, for example 8-bit encoding the analog audio signal quantized take 24 or 30 is encoded as 256 (8 th power of 2) orders of magnitude, often practical.

[0040] 图像转换模块205可以选用集成芯片AD9880,AD9880可以处理RGB图像以及复合视频(YPbPr)这两种模拟图像信号,具有150MSPS的编码速率和330MHz的带宽。 [0040] The image conversion module 205 can use an integrated chip AD9880, AD9880 may process the RGB image and a composite video (YPbPr) both analog image signal, and having a coding rate of a bandwidth of 330MHz 150MSPS. AD9880 的内部集成了所有的输入信号缓存,直流分量回复,偏置和增益调节电路,像素时钟生成电路,和输出数据格式。 Internal AD9880 integrates all the input buffer, the DC component response, the offset and gain adjustment circuit, a pixel clock generating circuit, and output data format. 由于AD9880内置了色彩空间转换电路,可以输入任意格式的色彩空间,也同样可以输出任何格式的色彩空间;在本发明实施例中,AD9880先将YPbPr模拟信号转成低压差分信号(LVDS,Low-Voltage Differential Signaling)信号,再通过编码,将LVDS信号转换成数字YUV信号。 Since AD9880 built color space conversion circuit, the input color space can be in any format, also may be output in any color space format; in the embodiment of the present invention, YPbPr AD9880 analog signal into a first low voltage differential signal (LVDS, Low- Voltage Differential Signaling) signal, and then by encoding, converting the LVDS signal into a digital YUV signal.

[0041] AD9880中的控制电路可以通过2-线的串口与控制模块105连接。 The [0041] AD9880 control circuit 105 may be connected through a 2-wire serial control module. AD9880有6个高阻抗的R、G、B输入通道。 AD9880 has six high-impedance R, G, B input channels. 适应的模拟信号电压范围为:0. 5-1. 0V。 Analog signal voltage range adapted to:.. 0 5-1 0V. 由于AD9880输入管脚的阻抗为75欧,所以在布线时,尽可能媒体激活模块101靠近连接。 Since the impedance of the input pin of AD9880 75 ohms, so that in the wiring, as close to the media activation module 101 is connected. 在实际系统的配置中,各零部件的阻抗尽可能匹配,以便在更宽的信号带宽范围内得到更好的性能。 In the actual system configuration, the impedance matching of each of the components as possible, in order to obtain better performance over a wider bandwidth signal.

[0042] 转换完成的数字音频信号和YUV信号输入到输出转换模块206,控制单元207通过控制指令通知输出转换模块206 :视频信号转换的播放码率以及分辨率。 [0042] The complete conversion of the digital audio signal and outputs the converted YUV signal is input to the module 206 notifies the control unit 207 outputs a control command conversion module 206: playback video signal conversion rate and resolution. 转换模块206对数字音频信号和YUV信号统一转换为所需要的TMDS信号,转换模块206可以为AD9889型号TMDS信号转换芯片。 Conversion module 206 and a digital audio signal is converted to a YUV signal unified desired TMDS signal, conversion module 206 may be a Model AD9889 TMDS signal conversion chip.

[0043] 当输出转换模块206将信号转换完成后,就可以将该TMDS信号通过HDMI端口输出到HDMI设备中播放。 [0043] When the output signal conversion module 206 converts completed, can be output to the HDMI TMDS signal playback device through the HDMI port.

[0044] 上述媒体激活模块,音频转换模块,图像转换模块,输出转换模块以及控制模块等5个模块都可以焊接在一个印刷电路板(PCB,Printed CircuitBoard)上,再在该PCB板上布置好供电电路和数据传输电路,本发明实施例中的数字媒体适配器的电子结构配置完成。 [0044] The media activation module, an audio conversion module, an image conversion module, an output module and a control module converts five modules are soldered on a printed circuit board (PCB, Printed CircuitBoard) on the well then the PCB is arranged the power supply circuit and a data transmission circuit, the electronic structure of the digital media adapter configuration of the present embodiment of the invention. 由于本发明数字媒体适配器的各个功能模块高度集成,所以本发明数字媒体适配器的体积相对小巧,便于携带,只要有HDMI设备的地方,带上用户本发明数字媒体适配器就可以随时的进行媒体转换,提高了用户体验。 Since each function module according to the present invention, a digital media adapter highly integrated, so that the volume of the digital media adapter of the present invention is relatively compact, easy to carry, as long as the HDMI apparatus where the present invention is to bring the user digital media adapter media conversion can be performed at any time, improve the user experience.

[0045] 本发明实施例中数字媒体适配器的主体外壳采用直插式的底座结构,具体结构请参考图3,该直插式底座的底部有一个散热口,该直插式底座的侧面有一个电源插口和HDM I端口,设计简洁,操作简单。 [0045] The main body housing an embodiment of the present invention, digital media adapter-line using a base structure, a specific configuration Referring to FIG. 3, there is a bottom-line vents of the base, the side surface of a base-line power jack port and HDM I, simple design, easy to operate.

[0046] 媒体终端(如dphone手机)可以直接插入本发明的底座,请参考图4,无需辅助数据线连接,非常的便捷。 [0046] The media terminal (e.g. dphone phone) may be directly inserted into the base of the present invention, please refer to FIG. 4, no auxiliary data line is connected, very convenient. 即便媒体终端的大小可能存在不合适的情况,本发明也可以配备一条转接数据线,该转接数据线与现有技术中的AVcable有所不同,AV cable的转接设备端分音频端和图像端,而且图像端还可能分为“R”、“G”、“B”三端,音频端还可能分左右声道,在接线时非常麻烦,而本发明的转接数据线的转接设备端仅对应本发明数字媒体适配器的一个插口,连接方便。 Even if the size of the media terminal may exist drawbacks in the present invention may be provided with an adapter data line, the data line switching prior art AVcable different adapter device side end audio sub AV cable and end of the image, but the image may also be divided into three terminal ends "R", "G", "B", left and right audio channels may end, when the wiring is very troublesome, and the data transfer line adapter of the present invention a socket device side corresponding to only digital media adapter of the present invention, easy connection.

[0047] 下面对对应上述数字媒体适配器的数字媒体转换方法的实施例进行说明,请参考图5,本发明实施例中数字媒体转换方法的一个实施例包括: [0047] The following embodiment corresponds to the above-described embodiment of the digital media adapter digital media conversion method will be described, referring to FIG 5, a digital media conversion method embodiment of the present invention, an embodiment comprising:

[0048] 501、向媒体终端发送认证指令; [0048] 501, the terminal sends an authentication command to the media;

[0049] 当媒体终端和本发明数字媒体适配器连接后,数字媒体适配器向媒体终端发送一条认证指令,打开媒体终端的媒体输出端口,使得媒体终端可以向数字媒体适配器发送媒体文件的模拟信号。 [0049] When the media terminal and a digital media adapter of the present invention, a digital media adapter sends an authentication command to the media terminal, media terminal opens a media output port, so that the media terminal may transmit an analog signal to digital media files media adapter.

[0050] 该认证指令用于激活媒体终端的CPU,使得媒体终端打开媒体输出端口。 [0050] The media terminal authentication instruction for activating a CPU, a terminal to open the media so that the media output port. 若该媒体终端为iphone手机,则该认证指令为ATS指令。 If the media terminal for the iphone mobile phone, the authentication instruction for the ATS command.

[0051] 502、分别获取模拟信号; [0051] 502, respectively acquire an analog signal;

[0052] 在媒体终端的媒体输出端口打开后,当媒体终端在本地播放媒体时,媒体终端的媒体输出端口就会输出相应媒体的模拟信号。 [0052] After the media output port of the media terminal is opened, when the media terminal in the local media player, media media terminal output port will output an analog signal corresponding to the media. 该模拟信号包括:模拟音频信号和模拟图像信号。 The analog signal comprising: an analog audio signal and an analog image signal.

[0053] 由于在模拟信号的传输中,媒体数据的音频信号和图像信号是分开的,因此,数字媒体适配器通过内部的两个模块分别获取该模拟音频信号和模拟图像信号。 [0053] Since the transmission of analog signals, audio signals and image signals are separated from the media data, thus obtaining the digital media adapter analog audio signal and an analog image signal obtained by the inside of the two modules, respectively.

[0054] 503、分别进行数字信号的转换; [0054] 503, respectively converted digital signal;

[0055] 数字媒体适配器分别对获取到的模拟音频信号和模拟图像信号进行数字信号的转换,分别转换为数字音频信号和数字图像信号;该模拟图像信号可以为RGB图像信号以及复合视频信号(YPbPr),该数字图像信号可以为YUV数字信号。 [0055] The digital media adapters respectively the acquired analog audio signal and an analog image signal converted digital signal, respectively, into digital audio signals and digital image signal; the analog image signal may be an RGB image signal and the composite video signal (YPbPr ), the digital image signal may be a YUV digital signal.

[0056] 数字图像信号的转换过程可以为先将YPbPr模拟信号转成低压差分信号LVDS信号,再通过编码,将LVDS信号转换成数字YUV信号。 [0056] The conversion process of the digital image signal can be converted into Low Voltage Differential Signaling LVDS signal YPbPr first analog signal, and then by encoding, converting the LVDS signal into a digital YUV signal.

[0057] 该模拟信号转数字信号可以使用脉码调制(PCM,Pulse Code Modulation)的方法,将模拟信号量化为数字信号,即让模拟信号的不同幅度分别对应不同的二进制数,例如采用8位编码可将模拟信号量化为256 (2的8次方)个量级,实用中常采取24位或30位编码。 [0057] The analog signals to digital signals may be used a pulse code modulation (PCM, Pulse Code Modulation) method, the analog signal is quantized into a digital signal, i.e., so that the analog signals of different amplitudes corresponding to different binary number, for example 8-bit encoding the quantized analog signal to take 24 or 30 is encoded as 256 (8 th power of 2) orders of magnitude, often practical.

[0058] 504、进行数字视频信号的转换; [0058] 504, converts the digital video signal;

[0059] 当模拟音频信号和模拟图像信号分别被转换为数字音频信号和数字图像信号后,数字媒体适配器对该数字音频信号和数字图像信号进行合并,统一转换为数字视频信号。 [0059] When the analog audio signal and analog image signals are converted into digital audio signal and the digital image signal, a digital media adapter merging the digital audio signal and digital image signal into a digital video signal is unity. 该数字视频信号可以为TMDS信号。 The digital video signal may be a TMDS signal.

[0060] 505、输出数字视频信号。 [0060] 505, outputs a digital video signal.

[0061] 数字媒体适配器将转换好的数字视频信号通过HDMI端口向HDMI设备传输。 [0061] Digital media adapter to the converted digital video signal to the HDMI port HDMI transmission devices.

[0062] 本发明的整个转换过程都由数字媒体适配器的控制单元通过指令进行控制,控制单元根据时钟电路监控音频和视频信号的数据帧发送和转换的情况,实时的缓存和传输数据,调整信号转换的速率,使得从模拟信号转数字信号,到数字的音频和图像信号转视频信号,再到数字视频信号的输出的各个工作周期得到协调,使得HDMI设备播放媒体数据时与数字媒体适配器输出的信号同步。 [0062] The whole conversion process by the control unit of the present invention, digital media adapter is controlled by the command, control, and real-time transmission of the data cache data clocking circuit according to the situation monitoring audio and video signals and transmit the frame conversion unit, adjustment signal conversion rate, so that digital signals from analog signals to digital audio and image signals into a video signal, and then outputs the duty cycle of the respective digital video signal are coordinated so that the HDMI equipment playing the media data output from the digital media adapter signal synchronization.

[0063] 本发明数字媒体转换方法在向媒体终端发送认证指令之前,还可以遥控器触发的步骤: [0063] Step digital media conversion method of the present invention, before sending the authentication instruction to the media terminal, may also be triggered by remote control:

[0064] 数字媒体适配器的遥控器向数字媒体适配器的媒体激活模块发送操作指令,触发向媒体终端发送认证指令的步骤。 [0064] The digital media adapter to the remote control to activate the digital media adapter module sends media operation command, the step of sending instructions to the authentication terminal trigger the media. 该遥控器发送操作指令的通信渠道可以是物理电路连接,可以红外光传输,也可以是其它电磁波信号的收发渠道,此处具体不作限定。 The remote controller transmits the operation instruction circuit communication channel may be a physical connection, an infrared optical transmission, the transceiver may be other sources of electromagnetic signals, in particular is not limited herein.

[0065] 本发明数字媒体转换方法在数字媒体适配器向媒体终端发送认证指令之后,可触发数字媒体适配器的电源输出模块向该媒体终端输出电流,对该媒体终端进行充电。 After the [0065] present invention, the digital media conversion method transmits authentication instruction to the media terminal adapter in the digital media, digital media adapter may trigger the power output module to the media terminal output current, to charge the media terminal.

[0066] 本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件完成,所述的程序可以存储于一种计算机可读存储介质中,上述提到的存储介质可以是只读存储器,磁盘或光盘等。 [0066] Those of ordinary skill in the art may understand that the above embodiments of the method steps may be all or part by a program instructing relevant hardware, the program may be stored in a computer-readable storage medium, the above mentioned the storage medium may be a read-only memory, magnetic or optical disk.

[0067] 以上对本发明所提供的一种数字媒体适配器以及转换方法进行了详细介绍,对于本领域的一般技术人员,依据本发明实施例的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。 [0067] for one or more digital media adapters, and conversion method of the present invention provides a detailed description for those of ordinary skill in the art, according to the invention The idea of ​​an embodiment, there are changes in the specific embodiments and application scope place, Therefore, the specification shall not be construed as limiting the present invention.

Claims (8)

  1. 1. 一种数字媒体适配器,其特征在于,包括:媒体激活模块,图像转换模块,音频转换模块,输出转换模块以及控制模块; 所述媒体激活模块用于向媒体终端发送认证指令,使得所述媒体终端分别向音频转换模块和图像转换模块发送模拟音频信号和模拟图像信号;所述音频转换模块用于通过媒体激活模块获取所述媒体终端发送的模拟音频信号,将所述模拟音频信号转换为数字音频信号,并向输出转换模块输出所述数字音频信号;所述图像转换模块用于通过媒体激活模块获取所述媒体终端发送的模拟图像信号,将所述模拟图像信号转换为数字图像信号,并向输出转换模块输出所述数字图像信号;所述输出转换模块用于将获取到的数字音频信号和数字图像信号统一转换成数字视频信号,并输出所述数字视频信号;所述控制模块用于分别向所述音频转换 A digital media adapter, characterized by comprising: a media activation module, an image conversion module, an audio conversion module converts the output module and a control module; activation module configured to send the media to the media terminal authentication instruction, such that the media terminal are transmitted analog image signal and an analog audio signal to the audio conversion module and the image conversion module; said audio converter module configured to obtain the media terminal through the media activation module transmits the analog audio signal, the analog audio signal into a digital audio signal, and outputs the output module converts the digital audio signal; the image conversion module for acquiring an analog image signal sent from the media terminal through the media activation module, the analog image signal into a digital image signal, and outputs the digital image signal output conversion module; said conversion module is configured to output the acquired digital audio signal and the digital image signal into a digital video signal is unity, and outputs said digital video signal; and the control module respectively to said audio transducer 模块、图像转换模块和输出转换模块发送控制指令,控制信号转换的流程。 Module, the image conversion module and the output module converts the transmission control instruction, the control signal conversion process.
  2. 2.根据权利要求1所述的适配器,其特征在于,所述适配器还包括: 电源输出模块,用于对所述媒体终端进行充电。 2. The adapter according to claim 1, wherein said adapter further comprising: a power output module for charging the media terminal.
  3. 3.根据权利要求1或2所述的适配器,其特征在于,所述适配器还包括: 遥控器,用于向媒体激活模块发送操作指令,触发媒体激活模块。 The adapter of claim 1 or claim 2, wherein said adapter further comprises: a remote controller for transmitting operation instructions to the media activation module, the activation module to trigger the media.
  4. 4.根据权利要求1或2所述的适配器,其特征在于,所述媒体激活模块,图像转换模块, 音频转换模块,输出转换模块以及控制模块都焊接在一个印刷电路板PCB上。 The adapter of claim 1 or claim 2, wherein the media activation module, an image conversion module, an audio conversion module converts the output module and a control module are soldered on a printed circuit board PCB.
  5. 5.根据权利要求4所述的适配器,其特征在于,所述适配器还包括: 主体外壳;所述PCB固定于主体外壳之内;所述主体外壳为直插式底座,所述媒体终端可直接插入所述底座,并与所述PCB相连接。 The adapter according to claim 4, wherein said adapter further comprises: a housing body; the PCB is fixed to the main body of the housing; the housing main body is a base-line, the media terminal can be directly inserting said base and connected to the PCB.
  6. 6. 一种数字媒体转换方法,其特征在于,包括:向媒体终端发送认证指令,使得所述媒体终端可以向数字媒体适配器发送模拟信号, 所述模拟信号包括模拟音频信号和模拟图像信号;分别获取媒体终端发送的模拟音频信号和模拟图像信号; 将所述模拟音频信号和模拟图像信号分别转换为数字音频信号和数字图像信号; 将所述数字音频信号和数字图像信号统一转换成数字视频信号,并输出所述数字视频信号。 A digital media conversion method, comprising: transmitting authentication instruction to the media terminal, such that the media terminal may send an analog signal to a digital media adapter, said analog signal comprises an analog audio signal and an analog image signal, respectively; acquiring an analog audio signal and analog image signal transmitted from the media terminal; the analog audio signal and analog image signals are converted into a digital audio signal and digital image signal; said digital audio signal and the digital image signal into a digital video signal unified and outputting the digital video signal.
  7. 7.根据权利要求6所述的方法,其特征在于,所述向媒体终端发送认证指令之后包括: 向所述媒体终端输出电流,对所述媒体终端进行充电。 7. The method according to claim 6, wherein, after sending the instruction to the authentication media terminal comprising: a current output terminal to the media, the media terminal is charged.
  8. 8.根据权利要求6或7所述的方法,其特征在于,所述向媒体终端发送认证指令之前包括:向数字媒体适配器的媒体激活模块发送操作指令,触发向媒体终端发送认证指令的步马聚ο 8. The method of claim 6 or claim 7, further comprising prior to said sending terminal authentication instruction to the media: sending an operation instruction to the digital media adapter media activation module to trigger the transmission of a media terminal authentication instruction step horse poly ο
CN 201010592404 2010-12-16 2010-12-16 Digital media adapter and conversion method CN102098284A (en)

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WO2012079353A1 (en) * 2010-12-16 2012-06-21 深圳市和宏实业有限公司 Digital media adapter and conversion method
CN103324883A (en) * 2013-06-24 2013-09-25 腾讯科技(深圳)有限公司 Multimedia player terminal, authentication method, authentication system and server thereof

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US20040170159A1 (en) * 2003-02-28 2004-09-02 Kim Myong Gi Digital audio and/or video streaming system
CN201323607Y (en) * 2008-12-26 2009-10-07 中国移动通信集团公司 Adapter for extending functions of mobile terminal
CN201467377U (en) * 2009-06-08 2010-05-12 杭州赛安斯图像科技有限公司 High-definition digital video/audio decoding device

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CN102098284A (en) * 2010-12-16 2011-06-15 深圳市和宏实业有限公司 Digital media adapter and conversion method

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US20040170159A1 (en) * 2003-02-28 2004-09-02 Kim Myong Gi Digital audio and/or video streaming system
CN201323607Y (en) * 2008-12-26 2009-10-07 中国移动通信集团公司 Adapter for extending functions of mobile terminal
CN201467377U (en) * 2009-06-08 2010-05-12 杭州赛安斯图像科技有限公司 High-definition digital video/audio decoding device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012079353A1 (en) * 2010-12-16 2012-06-21 深圳市和宏实业有限公司 Digital media adapter and conversion method
CN103324883A (en) * 2013-06-24 2013-09-25 腾讯科技(深圳)有限公司 Multimedia player terminal, authentication method, authentication system and server thereof

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