CN2588701Y

CN2588701Y - Network media player

Info

Publication number: CN2588701Y
Application number: CN02250096U
Authority: CN
Inventors: 苏毅; 罗成; 唐建新; 苏林
Original assignee: WANGSHITONGELECTRONICS CO Ltd SHENZHEN CITY
Current assignee: WANGSHITONGELECTRONICS CO Ltd SHENZHEN CITY
Priority date: 2002-12-03
Filing date: 2002-12-03
Publication date: 2003-11-26
Anticipated expiration: 2012-12-03

Abstract

The utility model relates to a network media player. The utility model aims at the defect of the existing STB which must be connect with the network during working; besides a CPU, a network interface, a decoder, a videoencoder and an automatic frequency coder, the existing STB is added with an erasable write memory for storing compressed video and audio signals inputted from the network interface, and the flow direction of the signal source is changed. The video and audio signals received by the network interface are not directly sent to the decoder but stored in the memory, and read by the decoder for carrying out decoding process when the signals are needed to be play, and digital video signals and digital audio signals are outputted to the videoencoder and the automatic frequency coder respectively. The network media player of the utility model is not needed to connect with the network when playing, thereby, the range of use can be spread.

Description

Network media player

Technical field

The utility model relates to apparatus for media playing, more particularly, relates to a kind of network media player.

Background technology

Set-top box is a kind of typical network media player in the prior art, and its principle as shown in Figure 1.Wherein network interface 7 is used to connect outside cable network, for example when connecting the cable of cable TV, can receive the video and audio signal that it sends, and the video and audio signal here generally is the digital signal of compressed encoding process; This signal is delivered to decoder 2 through CPU 1, de-compresses into digital video signal and digital audio and video signals; By video encoder 3 digital video signal is reduced to analog video signal again, by audio coder 4 digital audio and video signals is reduced to simulated audio signal simultaneously; Delivering to television set (TV) at last plays.FLASH 6 (flash memory) among the figure is used to deposit the required program of CPU 1 operation, 5 internal memories as CPU 1 of SDRAM.

From the above-mentioned course of work as can be seen, this TV-set top box can only carry out online broadcast, when set-top box and network disconnect when being connected, just can not receive video and audio signal source again, also just can't play any information.Because of it can only could be worked when being connected with network, so range of application is very limited.

The utility model content

The technical problems to be solved in the utility model is, the defective that could work in the time of must being connected with network at existing set-top box, a kind of network media player is provided, makes it when not being connected, also can play the effect of media player, thereby expand its scope of application greatly with network.

The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of network media player, comprise CPU, be used for being connected to receive the network interface of compressed video and audio signal with external network, be used for described compressed video and audio signal are carried out the decoder of decoding processing with output digital video signal and digital audio and video signals, be connected, be used for described digital video signal and digital audio and video signals are reduced to respectively the video encoder and the audio coder of analog video signal and simulated audio signal with described decoder;

It is characterized in that, also comprise being used to store by the compressed video of described network interface input and the scratch pad memory of audio signal; Described decoder reads compressed video and audio signal from described memory, carry out decoding processing again, and respectively to described video encoder and audio coder output digital video signal and digital audio and video signals.

In network media player described in the utility model, described scratch pad memory can be hard disk or FLASH storage card.Described network interface can be the ordinary lines network interface, can also comprise radio network interface.

The utility model has increased scratch pad memory on the basis of existing set-top box, and changed the flow direction of signal source, by video and audio signal that network interface received is not directly to deliver to decoder, but be kept in the memory earlier, when needs are play, read by decoder again and carry out decoding processing, so it does not need to be connected with network when playing, thereby can expand its scope of application greatly, specific embodiment will be introduced in the back.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the theory diagram of existing set-top box;

Fig. 2 is the theory diagram of the utility model network media player;

Fig. 3 is the circuit diagram of network media player in preferred embodiment of the utility model.

Embodiment

The principle of the network media player in the utility model as shown in Figure 2, the main distinction of its hardware components and existing set-top box is to have increased memory interface 8 and scratch pad memory 9.Scratch pad memory 9 wherein can be a hard disk, or the FLASH storage card, for example CF card, SM card, mmc card, SONY memory stick etc.Decoder 2 wherein can be compression Video Decoders such as MPEG-1 (motion picture expert group, the active images that a kind of compression ratio is bigger and the compression standard of sound), MPEG-2, MPEG-4.

Also changed the flow direction of signal source in the utility model, the video and the audio signal that are received by wired network interface 7 are not directly to deliver to decoder 2, but be kept at earlier in the memory 9, when needs are play, read by decoder 2 again and carry out decoding processing, so it does not need to be connected with network when playing, thereby can expand its scope of application greatly.

As can be seen from Figure 2, can also on wired network interface 7, connect radio network interface 10, for example connect the standard radio bridge, thus the video and the audio signal that network media player of the present utility model can be received send by wireless network.

A preferred embodiment of utility model network media player as shown in Figure 3, U1 wherein is integrated CPU and decoder, what adopt is the CS98000 chip, and this chip has the function of central processing unit and mpeg decoder, and its effect is equivalent to CPU 1 and the decoder 2 among Fig. 2.SDRAM in the U2 corresponding diagram 2 among Fig. 3 is the internal memory of U1; U3 is the FLASH 6 in the corresponding diagram 2 then, is used to deposit the required working procedure of U1.

U6 among Fig. 3 is the wired network interface circuit, employing be the RTL-8019AS chip, be connected to the CON5 that is used to connect external network by network transformer U7 again.

U4 among Fig. 3 is the video encoder circuit, employing be the CS4955 chip, the analog video signal of its output can output to television set or miscellaneous equipment through CON2.

U5 among Fig. 3 is the audio coder circuit, employing be the CS4360 chip, the simulated audio signal of two sound channels of output can output to television set or miscellaneous equipment through CON3 and CON4.

CON1 among Fig. 3 is a memory interface, during use, hard disk or FLASH card directly can be inserted on the CON1, also can change memory as required.

On superliner coach, amusement equipment generally all are housed, the TV, the devices such as VCD, DVD that for example are used for movie, Music Television (MTV), and in playing process, generally all can break for commercialsy, present way be will be inserted with advertising segment earlier performance recording on VCD, DVD or other storage medium, take on the passenger vehicle again and play.The shortcoming of this method is that the program among each VCD or the DVD is fixed, if want to change ad content or intercut frequency, just need make VCD or DVD video disc again, so change programme content, ad content or intercut the cost of frequency higher.

After being installed in network media player of the present utility model on the automobile, cooperate television set again, but same movie program, Music Television (MTV) and advertising message.And be easy to change programme content, ad content or intercut frequency.Concrete grammar is to make the content that needs change by control centre earlier, when automobile sails to control centre, can network media player and control centre's server be coupled together by grid line, carries out video and audio signal transmission then.If in network media player, load onto radio network interface, then can be by control centre by the wireless base station to the network media player transmission of video and the audio signal that are contained on the automobile, do not need grid line to connect,, also can change its programme content, ad content or intercut frequency in the way even automobile is travelling.

Claims

1, a kind of network media player, comprise CPU, be used for being connected to receive the network interface of compressed video and audio signal with external network, be used for described compressed video and audio signal are carried out the decoder of decoding processing with output digital video signal and digital audio and video signals, be connected, be used for described digital video signal and digital audio and video signals are reduced to respectively the video encoder and the audio coder of analog video signal and simulated audio signal with described decoder;

2, network media player according to claim 1 is characterized in that, described scratch pad memory is a hard disk.

3, network media player according to claim 1 is characterized in that, described scratch pad memory can be CF card, SM card, mmc card or SONY memory stick.

4, according to each described network media player among the claim 1-3, it is characterized in that described network interface includes wired network interface and radio network interface.

According to each described network media player among the claim 1-3, it is characterized in that 5, described decoder can be compression Video Decoders such as MPEG-1, MPEG-2, MPEG-4.

6, according to each described network media player among the claim 1-3, it is characterized in that described CPU can be integrated in the chip of decoder.