CN100433803C - Digital media player - Google Patents

Abstract

The present invention relates to a digital media player. In order to solve the problem that the media format that can be received by the existing media player is relatively single and the application scope is very limited, the present invention provides a digital media player that can be connected to multiple input devices and can support multiple media formats, including an input interface, an output interface and an MPEG decoder; the input interface includes at least one wireless local area network interface, the decoder is an MPEG-1, MPEG-2 or MPEG-4 decoder, the output interface includes at least one CVBS interface, and also includes a DVI interface, etc. The digital media player of the present invention can be connected to a PC, a HUB, or the Internet through a wired (LAN) or wireless (WLAN) local area network to receive or download the required music, movie and other data, and its output interface is connected to the corresponding audio and display equipment, so that the corresponding audio and video signals can be received, processed, and played in real time. The entire player is small in size and is particularly suitable for use in companies and homes.

Description

digital media player

technical field

The invention relates to a multimedia playing device, more specifically, to a digital media player integrating wired and wireless network transmission technology, compressed video decoding technology, and analog and digital output interfaces.

Background technique

The set-top box is a kind of typical media player in the prior art, and it usually receives the video and audio signal transmitted through the cable TV cable through a cable TV interface, and the video and audio signal here are generally processed through compression coding Digital signal; the signal is sent to the decoder, decompressed into digital video signal and digital audio signal; then the corresponding digital-to-analog conversion circuit restores the digital video signal to an analog video signal, and restores the digital audio signal to an analog audio signal ; Send to television set (TV) to play at last.

The main function of this set-top box is to convert the digital signal from the cable TV cable into the analog signal required by the traditional analog TV. Its input terminal can only be connected with the cable TV network, and the media format it can receive is relatively simple, and it cannot play pictures, movies or music stored in computers or servers. When the set-top box is disconnected from the cable TV cable, it can no longer receive video and audio signal sources, and cannot play any information, so the scope of application is very limited.

Contents of the invention

Aiming at the above-mentioned defects of the existing set-top box, the present invention solves the problems that the existing media player can only be connected with the cable TV cable, the media format that can be received is relatively single, and the application range is very limited. Device-connected, digital media player that supports multiple media formats.

The technical solution adopted by the present invention to solve the technical problems is: to construct a digital media player, including a microprocessor, an input interface, an output interface, and a decoder for decoding and processing compressed video and audio signals; wherein It includes a remote control receiving circuit connected to the microprocessor, and a remote controller that can send remote control signals to the remote control receiving circuit; wherein, the input interface includes at least one wireless local area network interface, and the decoder is MPEG-1, For an MPEG-2 or MPEG-4 decoder, the output interface includes at least one CVBS (composite video signal) output interface.

In the digital media player of the present invention, the input interface also includes one or more of the three input interfaces of a USB universal interface, a wired LAN interface, and a card reader for reading data from a memory card. kind.

The output interface also includes one or more of three kinds of video output interfaces: DVI (digital video) interface, Y/C bright color separation interface, and YPbPr component output interface. At the same time, it also includes one or more of three audio output interfaces: 2-channel stereo output interface, digital audio optical fiber output interface, and digital audio coaxial output interface.

In the digital media player of the present invention, in order to facilitate control without a remote controller, it also includes a control panel circuit connected to the microprocessor.

A variety of input interfaces are integrated in the digital media player of the present invention, especially a wireless local area network interface is set, and the digital video signal of external input can be received in a wireless manner, including MPEG-1, MPEG-2, and MPEG-4 formats. VCD, DVD, DIVX, XVID digital video signal and CD, MP3, WMA audio signal. At the same time, its various output interfaces can be used to output audio and video signals to different devices. The digital media player of the present invention can be connected to a personal computer through a USB interface, can also be connected to a personal computer or a HUB (network hub) through a wired or wireless local area network, and can be further connected to the Internet to browse web pages or download audio, video or picture data; Connect its output interface to the corresponding audio and display equipment, then it can receive, process and play corresponding audio and/or video signals in real time. The whole player is small in size, especially suitable for companies and families.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the functional block diagram of digital media player of the present invention;

Fig. 2 is a circuit block diagram of a digital media player in a preferred embodiment of the present invention;

Fig. 3 is a schematic diagram of an exploded structure of a digital media player in a preferred embodiment of the present invention;

FIG. 4 is a schematic diagram of the rear panel of the digital media player shown in FIG. 3, showing multiple input and output interfaces.

Detailed ways

As shown in the dotted line box of Fig. 1, in the digital media player of the present invention, comprise a microprocessor and an MPEG decoder, during concrete implementation, can adopt a chip that integrates microprocessor and MPEG decoder. The MPEG decoder can decode digital signals such as MPEG-1, MPEG-2, or MPEG-4 it receives, and at the same time, it integrates a TV encoder, which can process the decoded digital video signal into an analog video output after the signal. It can be seen that the decoder can output corresponding digital and analog audio and video signals.

As can be seen from Fig. 1, this digital media player has four kinds of input interfaces, is respectively: 1) USB common interface, specifically can be USB1.1 or USB2.0 common interface, and it can be connected with external personal computer (PC) Connect to receive the required digital audio and video signals; 2) Internet local area network interface (LAN), which can be directly connected to the PC, or connected to other PCs or servers through the HUB, or connected to the Internet to receive the required Digital audio and video signals; 3) Wireless local area network interface (WLAN), specifically IEEE802.11b or IEEE802.11g, which can be directly connected to a PC, or connected to other PCs or servers through a HUB, or connected to the Internet, to Receive the required digital audio and video signals; 4) card reader, which can be connected with memory cards used in devices such as digital cameras, such as CF cards, SD cards, SM cards, MMC cards, or SONY memory sticks, etc., to Read static or dynamic video data in it. It can be seen that the digital media player of the present invention can be connected with external devices through various input interfaces to receive required audio or video signals.

As can be seen from Figure 1, the digital media player has four video output interfaces, which are:

1) CVBS interface, used to output composite video signal, which is a basic analog video signal suitable for common analog TV.

2) Y/C bright color separation interface, which can output analog video signals with bright color separation, and can be connected to the S terminal of the TV;

3) YPbPr component output interface;

4) DVI interface, which directly outputs digital video signals and can be directly connected to digital TV or other digital video display devices.

As can be seen from Figure 1, the digital media player is also provided with two audio output interfaces, analog and digital, wherein the analog audio output interface is a 2-channel stereo output interface, and the digital audio output interface can be an optical fiber output interface or Coaxial output interface. It can be seen that the digital media player of the present invention can be connected to external devices through various output interfaces to output audio and video signals to related audio and display devices.

In order to facilitate the user to control the digital media player, a remote control receiving circuit is arranged in it, and a remote controller which is structurally independent from the digital media player sends remote control signals to the remote control receiving circuit. In addition, in order to facilitate control without a remote controller, a control panel circuit is also provided, and some main control functions can also be completed through the control buttons.

By connecting the output interface of the digital media player of the present invention to corresponding audio equipment, various digital music can be played, and audio formats such as MP3, AC3, LPCM, WAV, WMA can be supported, and it can be used as an internet radio.

In addition, the digital media player of the present invention can also be used to browse digital pictures or play movies. For example, if you directly play pictures, movies or music in the computer to the TV, the viewing effect will be much better because the TV screen is much larger than the computer display; the digital media player can support JPEG, GIF, TIF, BMP, PNG and other picture formats, and support MPEG1/2/4, DIVX, Xvid, RMP4 and other video formats; also support Dolby 5.1 surround sound effect and high-definition TV.

In addition, the digital media player of the present invention can also be used to browse webpages. If it is connected to the Internet through a high-speed network line, the required music and movies can be downloaded. At this time, the TV can be used as a display, and the user can lie comfortably Operate on the sofa.

In a preferred embodiment of the present invention, the circuit of digital media player is as shown in Figure 2, wherein, decoder adopts EM8550/EM8551 chip, wherein integrates MPEG decoding, microprocessor (MCU), TV encoder (TV ENCODER ) and other functions; the upper part on the right is a wireless network interface (PCMCIA) with a card reader, the lower part is a wired network interface (RJ45), and the upper part on the left is a USB interface. These three constitute the four inputs of the entire player interface. The SDRAM and FLASH under the wired network interface are the program memory and internal memory of the decoder. Under the USB interface are various output interfaces, from top to bottom are: analog audio left and right channel output, digital audio optical fiber output, digital audio coaxial output, composite video output, S terminal output, component Y, Pb, Pr output, VGA (Video Graphics Array) output, and DVI digital video output.

In a preferred embodiment of the present invention, the structure of the digital media player is as shown in Figure 3 and Figure 4, as can be seen from Figure 3, the whole player consists of an upper shell 2, a lower shell 6, a front panel 1, a rear panel 5 , a printed circuit board 3 with a corresponding circuit, and a wireless network interface 4 with a card reader.

The schematic diagram of the rear panel shown in Figure 4 shows the various input and output interfaces of the player. From left to right, they are: DVI digital video output, component Y, Pb, Pr output, S terminal output, composite video output, Analog audio left and right channel output, digital audio coaxial output, digital audio optical fiber output, wired network interface, USB interface, and power input interface.

Claims (1)

1. digital media player, the decoder that comprises microprocessor, input interface, output interface and be used for compressed video and audio signal are carried out decoding processing; It is characterized in that,

Also comprise the remote-control receiving circuit that is connected with described microprocessor, and the remote controller that can send remote signal to described remote-control receiving circuit; Wherein, described input interface comprises a wireless lan interfaces at least, and described decoder is MPEG-1, MPEG-2 or MPEG-4 decoder, and described output interface comprises a CVBS (composite video signal) output interface at least;

Also comprise the control panel circuit that is connected with described microprocessor, and described microprocessor and decoder are integrated in the same chip;

Described input interface also comprises: cable LAN interface (LAN), USB general-purpose interface and be used for from the card reader of storage card reading of data;

Described output interface also comprises: DVI (digital visual interface), Y/C light tone separation interface, YPbPr component output interface and audio output interface;

Described card reader and described wireless lan interfaces integrate;

Described audio output interface is one or more in analogue audio frequency 2 channel stereo output interfaces, digital audio optical fiber output interface or the coaxial output interface of digital audio.

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