CN1893572A - Insertion-type media player for use in network television-set top-set-box - Google Patents
Insertion-type media player for use in network television-set top-set-box Download PDFInfo
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- CN1893572A CN1893572A CNA2005100276116A CN200510027611A CN1893572A CN 1893572 A CN1893572 A CN 1893572A CN A2005100276116 A CNA2005100276116 A CN A2005100276116A CN 200510027611 A CN200510027611 A CN 200510027611A CN 1893572 A CN1893572 A CN 1893572A
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Abstract
The media player includes a playing module composed of control module, module of network transmission protocol, module for analyzing packaging format, intelligent buffer module, and DSP interface module run on network processor. The media player also includes hardware support kit with network processor and decoding chip in high speed as core, as well as supporting software kit with embedded type Linux as core. Through network interface, after receiving and processing IP media data, the media player sends data to DSP for decoding, and then outputs audio/video signal through D/A conversion chip and audio/video interface in order to implement function for playing media programs. Through upgrading DSP decoding program, adding network transmission protocols etc. supported by module, the invention reduces upgrading cost. Intelligent buffer module makes playing procedure smoothly and sharply. DSP function of online screen display (OSD) displays information of image and text in video frame.
Description
The ■ technical field
The present invention relates to a kind of insertion-type media player that is applied to network television-set top-set-box, belong to the field of picture communication of electrical communication technology.
The ■ background technology
Along with the Internet era arrival, realize easily that by network the intermediate equipment of data sharing is arisen at the historic moment.Network television-set top-set-box is exactly wherein a kind of, it can be converted into the media program data on the IP network that receives the audio-video signal output of simulation through coding, parsing, realize video request program (VOD), electronic program guides (EPG), Email, internet browsing and various interactive services and multimedia service in interior function, make people not go out the door and just can enjoy all enjoyment that home theater, family Internet bar are brought.
In the prior art, the player of coil insertion device top box is generally provided by chip supplier, the set-top box that the chipset that these players can only be used for chip supplier and provide is formed, and can not be used for the chipset that other chip supplier provides.In the applying date is on December 03rd, 2002, application number is to disclose a kind of " network media player " in 02250096.0 the Chinese utility application file, 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 with described decoder, 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; The scratch pad memory that also comprises the video and audio signal that is used for the input of storage networking interface.The player of existing coil insertion device top box is only supported 1-2 kind audio frequency and video form and supported the chipset of appointment, supports more multitone video format as needs, will change chipset and corresponding player, and is not only cumbersome, and increases cost.
Present IP network is very poor for the control of flow aspect, can't guarantee with stable flow rate transmission data, cause decoding intermittently, not smooth, influenced the smooth and easy and clear of television image to a certain extent.
The ■ summary of the invention
The object of the present invention is to provide and a kind of prior art has been made the improved insertion-type media player that is applied to network television-set top-set-box, this media player highly versatile, possess good scalability, and can effectively improve the not smooth phenomenon of the decoding that causes because of the network traffics fluctuation.
In order to achieve the above object, technical solution of the present invention is: the system configuration scheme that is provided with a soft or hard combination, be the hardware support kit (3) of core and to adopt built-in Linux operating system be the software kit (2) of core promptly, and form and run on playing module (1) on the network processing unit by a plurality of modules with network processing unit and high-speed decoding chip.
Described playing module (1) comprises control module (11), network transmission protocol module (12), encapsulation format analysis module (13), intelligent buffer module (14), high-speed decoding chip (DSP) interface module (15).
Control module (11) is the core of playing module (1), and is mutual by itself and each module, safeguards the playing process of media program.
Network transmission protocol module (12) is responsible for finishing all work relevant with network, comprises with media server connecting; According to particular network host-host protocol and media apparatus interaction.
Encapsulation format analysis module (13) is responsible for finishing all work relevant with the medium encapsulation format, comprises judging whether the data that receive meet specific encapsulation format; Obtain necessary information according to encapsulation format analyzing medium data.
Intelligent buffer module (14) is in charge of a buffer area, and purpose is the not smooth phenomenon of decoding that causes because of the network traffics fluctuation in order to improve.
High-speed decoding chip (DSP) interface module (15) is responsible for and the DSP communication, comprises and writes media data to DSP; Writing on screen shows (OSD) data and orders DSP; The control dsp operation; It is medium to DSP to download decoding program.
Described network processing unit is the master controller of operation playing module (1), carries out the startup of system initialization routine, operating system, and moves various controls and handling procedure.
Described high-speed decoding chip (DSP) is and the supporting decoder module of playing module (1), and the operation decoding program converts the media data of various forms to audio-video signal.It also has in screen demonstration (OSD) function simultaneously, can export screen displayed figure and Word message at video.
Media player function of the present invention realizes by following steps:
A. network transmission protocol module receives and the process IP media data by network interface;
B. deposit in the buffer area after the encapsulation format analysis module analyzing medium data;
C. the media data in the buffer area writes DSP;
D.DSP decodes to media data, and by analog-digital chip and audio-video interface audio-video signal is exported.
The decoding program of media player of the present invention can read from the memory of set-top box, also can obtain from network.And, can support multiple network host-host protocol such as RTSP, HTTP, MMS etc., can support the new network transmission protocol, can support multiple medium encapsulation format such as ASF, MPEG2-PS, MPEG2-TS, ISMA-MP4 etc., can support new medium encapsulation format, the decoding program of DSP is supported the various types of media coded format, as WMV9, WMA, MP3, MPEG1/2/4 etc., support is downloaded decoding program to DSP from network, makes the decoding capability of DSP be expanded by download.That can utilize DSP exports screen displayed figure and Word message in screen demonstration (OSD) function at video, imports response etc. as media name, media length, broadcast state, user.
The good effect of ■ invention
Media player of the present invention adopts modularized design method, cooperate corresponding software system and hardware system can under the situation of not changing hardware, support multiple network host-host protocol, medium encapsulation format and media coding form, and can future by the more network transmission protocol of software upgrading support, medium encapsulation format and media coding form, have the characteristics of high scalability.Use the intelligent buffer module effectively to improve the not smooth phenomenon of decoding that causes because of the network traffics fluctuation, make television image more smooth and easy clear.That utilizes DSP shows that at screen (OSD) function at video output screen displayed figure and Word message, has made things convenient for user's operation.
By loading new module and downloading decoding program and can realize from the network transmission protocol, medium encapsulation format to the omnibearing expansion of media coding form, strengthened the function of the product that uses this player greatly, accelerate the Products Development cycle, improved competitiveness of product.
The ■ description of drawings
Fig. 1 is the graph of a relation of playing module of the present invention (1) and software kit (2) and hardware support kit (3);
Fig. 2 is the formation block diagram of the playing module (1) of media player of the present invention;
Fig. 3 is the formation block diagram of the software kit (2) of media player of the present invention;
Fig. 4 is the media data and the control command flow graph of media player of the present invention.
Fig. 5 is the formation block diagram of the hardware support kit (3) of media player of the present invention;
Fig. 6 is the flow chart of the playing module (1) of media player of the present invention;
The ■ embodiment
The invention will be further described below in conjunction with drawings and Examples.
With reference to Fig. 1:
This is the graph of a relation of playing module of the present invention (1) and software kit (2) and hardware support kit (3).Playing module of the present invention (1) need operate on the hardware support kit (3), needs the support of software kit (2) can bring into play its function simultaneously.
With reference to Fig. 2:
This is the formation block diagram of the playing module (1) of media player of the present invention.Playing module of the present invention (1) comprises control module (11), network transmission protocol module (12), encapsulation format analysis module (13), intelligent buffer module (14), dsp interface module (15).
Control module (11) is the core of playing module (1), and is mutual with each module by it, safeguards the playing process of media program.
Control module (11) at first needs each module of initialization, then starts the playing flow that each module begins media program and promptly begins to receive and processing media data.
The media data of coming from transmission over networks is under the control of control module (11), at first enter network transmission protocol module (12) and finish the processing of host-host protocol, enter encapsulation format analysis module (13) then and carry out format analysis, deposited in the buffer area by intelligent buffer module (14), the data in the last buffer area write by dsp interface module (15) and do in the dsp chip to export after decoding is converted to audio-video signal again.
Control module (11) is finished in the process of above-mentioned flow process in responsible coordination control, also need to receive the order that the user sends by remote controller simultaneously, according to the state of current player each module is made control corresponding again after judging the control action of order representative, as stop, time-out, F.F., rewind down, continuation etc.
Control module (11) also needs to stop the work of each module during flow process end condition such as program transmission finish when occurring, customer requirements stops to play, can't recover fatal error, withdraws from player after discharging resource.
Control module (11) also needs to be sent in screen by dsp interface module (15) to DSP and shows that (OSD) data and order are to import information such as response video output screen displayed such as media name, media length, broadcast state, user.
Network transmission protocol module (12) is responsible for finishing all work relevant with network, comprising: and media server connects; According to particular network host-host protocol and media apparatus interaction,, obtain the descriptor of media program etc. as the broadcast of control media program; Reception is handled data from the media data of media server transmission and according to agreement.The different network transmission protocols such as HTTP, RTSP, MMS etc. use an identical group interface function, thereby make that the process that adds a kind of new network transmission protocol is fairly simple.
Encapsulation format analysis module (13) is responsible for finishing all work relevant with the medium encapsulation format, comprising: judge whether the data that receive meet specific encapsulation format; Obtain necessary information according to encapsulation format analyzing medium data, such as the location of data, the temporal information of data etc.Different medium encapsulation format such as ASF, MPEG2-PS, MPEG2-TS, MP3 etc. use an identical group interface function, thereby make that the process that adds a kind of new medium encapsulation format is fairly simple.
Intelligent buffer module (14) is in charge of a buffer area, and purpose is the not smooth phenomenon of decoding that causes because of the network traffics fluctuation in order to improve.Its function comprises: the size of decision buffer area; Deposit the data after analyzing in buffer area; The state of judging buffer area is as full, sky etc.; Read data in the buffer area in DSP.Because present IP network is very poor for the control of flow aspect, can't guarantee with the stable flow rate transmission of media data, and is so it is desultory to cause decoding, not smooth at all.Can improve this phenomenon by the intelligent buffer module.
Dsp interface module (15) is responsible for and the DSP communication, comprises and writes media data to DSP; Writing on screen shows (OSD) data and orders DSP; The control dsp operation; It is medium to DSP to download decoding program.
With reference to Fig. 3:
This is the formation block diagram of the software kit (2) of media player of the present invention.The core of software kit (2) is embedded Linux operating system (22), adds that various hardware drive programs, application program (21) and data file constitute.
Hardware drive program mainly comprises serial line interface driver module (23), infrared interface driver module (24), network interface driver module (25), high-speed decoding chip (DSP) driver module (26) etc.
Application software system (21) is made up of a plurality of independently working procedure modules, connects by configuration file and system message queue, carries out different functions separately.Each program module all can produce log information in running, be saved in the journal file by local module.
Described infrared interface driver module (24) be responsible for to receive the user by the control command that remote controller sends, and puts into command queue after converting specific command code to, and the control module (11) that waits media player (1) reads.Network interface driver module (25) has been realized the TCP/IP network protocol stack, a succinct easy-to-use network interface is provided for upper level applications such as player, the network transmission protocol module (12) of player by this interface finish with network on other equipment such as the task of connecting, receiving data such as media server.High-speed decoding chip (DSP) driver module (26) then provides the bottom passage mutual with dsp chip, the dsp interface module (15) of player has been set up path by the program of this driver and DSP inside, can finish as downloading DSP decoding program, transmission of media data, control DSP decoded state (as stop, time-out, F.F., rewind down, continuation etc.), being transmitted in screen and showing tasks such as (OSD) order and data.
With reference to Fig. 4:
This is the media data and the control command flow graph of media player of the present invention.
As shown in the figure, thick arrow is represented the flow direction of media data.Referring to figs. 2 and 3 description, the media data on the network is according to following path flow:
At first carry out protocol processes to network transmission protocol module (12) by network interface driver module (25), make format analysis to encapsulation format analysis module (13) again, deposit the buffer area that intelligent buffer module (14) is managed then in, read from buffer area afterwards, finish decoding by entering DSP behind dsp interface module (15) and the DSP driver module (26).
As shown in the figure, thin arrow is represented the flow direction of control command.Referring to figs. 2 and 3 description, user's control commands is read from infrared driver module (24) by control module (11), judges it specifically is which kind of each module of order (as time-out, continuation, F.F., rewind down etc.) back control is made corresponding action then.Control module (11) also will be judged and currently whether received whether end of transmission of media data and media data from network in addition, and same controls corresponding module according to these conditions.
With reference to Fig. 5:
This is the formation block diagram of the hardware support kit (3) of media player of the present invention, comprises network processing unit (NP), high speed decoder (DSP), memory, network interface, analog-digital chip, audio-video interface and peripheral interface (comprising internal memory, serial line interface, infrared interface etc.).
Described network processing unit (NP) is the master controller of operation playing module (1).It receives and handles from the various data on the IP network by network interface, and the audio, video data that parses is sent on the high-speed decoding chip (DSP), is moving the operating system and the application program of described software kit (2) on the network processing unit.
Described high-speed decoding chip (DSP), be and the supporting decoder module of playing module (1), carry out initialization, the operation decoding program by network processing unit, convert the audio, video data of various forms to audio-video signal by analog-digital chip, by audio-video interface it is exported again.Wherein the video conversion chip CCIR mode data that will derive from DSP converts analog, base-band television signal to, and sort signal can be play on the standard television interface.The audio conversion chip will derive from the AC97 audio signal of DSP and export frequently through conversion rear drive double-tone.It also has in screen demonstration (OSD) function simultaneously, can export screen displayed figure and Word message at video.Specialty decoding drive software and OSD display driver software on the DSP are provided by DSP production firm.
Described memory has been preserved system initialization routine, operating system, decoding program, application program and various data, adopts non-volatile flash memory (FLASH) to realize.
Described network interface adopts general Ethernet interface, and external RJ45 socket can connect twisted-pair feeder, the network interface of internal interface network processing unit (MII).
Described analog-digital chip is converted to the audio-video signal of numeral the audio-video signal of simulation.Wherein the video conversion chip CCIR mode data that will derive from DSP converts analog, base-band television signal to, and sort signal can be play on the standard television interface.The audio conversion chip will derive from the AC97 audio signal of DSP and export frequently through conversion rear drive double-tone.
Described audio-video interface, the output interface of analog audio-video signal.
Described other peripheral interface components and parts comprise internal memory, serial line interface, infrared interface etc.
With reference to Fig. 6:
This is the flow chart of the playing module (1) of media player of the present invention, and its groundwork flow process is described.The flow process of media renderer plays media program as shown in the figure.
At first, playing module bring into operation (51), control module obtains the address (52) of media program that need to play from call parameters, what judge that this program uses according to program address is which kind of network transmission protocol (53), the network transmission protocol module (54) of initialization correspondence then.The network transmission protocol of media program is a lot, as HTTP, RTSP, MMS etc., by this operational mode, media player can be supported the multiple network host-host protocol under the situation of not changing hardware, and can be according to the development in future of the network transmission protocol, by realizing the new more network transmission protocol of network transmission protocol module support.
Control module is called function and media server in the network transmission protocol module connect (55), connect the descriptor (56) of setting up back and media server communication acquisition media program, usually the encapsulation format, coded format and the version that include media program in this information, data such as program length.Control module extracts the encapsulation format information (57) of program from descriptor then, judges call which kind of encapsulation format analysis module, this encapsulation format analysis module (58) of initialization according to encapsulation format information.The encapsulation format of media program is a lot, as ASF, MPEG2-PS, MPEG2-TS, ISMA-MP4 etc., by this operational mode, media player can be supported multiple encapsulation format under the situation of not changing hardware, and can be according to the development in future of medium encapsulation format, by realizing the new more encapsulation format of encapsulation format analysis module support.
Control module also needs to come initialization intelligent buffer module (59) according to host-host protocol, encapsulation format that program uses, such as the size of decision buffer area etc.
Control module is looked for corresponding decoding program (60) according to the coded format and the version of program in memory.If do not have in the memory, download corresponding decoding program from the procedure service device.Subsequently decoding program is downloaded to (61) among the DSP, and start dsp operation decoding program (62).The coded format version of media program is a lot, as MPEG2, MPEG4, WMV9, MP3 etc., by this operational mode, media player can be supported multiple coded format under the situation of not changing hardware, and can be according to the development in future of coded format, by the more coded format of upgrading decoding program support.
After decoding program started, the function that control module is called in the network transmission protocol module sent the order (63) of broadcast program to media server, starts each module simultaneously and begins to receive processing media data (64).
Control module is called function in the network transmission protocol module and is detected currently whether received that from network media data needs to handle (65), if data are arranged then the function that calls in the network transmission protocol module is handled (66).The function that the data that processing obtains are given in the encapsulation format analysis module is again analyzed (67).Data after the analysis deposit (68) in the buffer area in by the function of intelligent buffer module.
The function that control module is called in the infrared driver module detects the current user input commands (69) of whether having received, if have then judge whether to be cease and desist order (70), the words that are need be sent control commands corresponding to each module and close each module, withdraw from playing module (75) then, finish user's instruction (71) if other user command then need be sent control commands corresponding to each module equally.Can support different control commands according to the different network transmission protocols with media server, such as time-out, fast forwarding and fast rewinding etc.
Control module is called function in the intelligent buffer module and is decided and currently whether should write media data (72) in the buffer memory to DSP, need to judge whether end of transmission (73) of media data after writing according to current state information, need that the remaining data in the buffer area is continued to write among the DSP its decoding of wait if transmission has finished and finish (74), withdraw from playing module (75) after closing each module then, need to continue to wait for the data (65) on the network if transmission is not finished.
Said process (65-74) constitutes the major cycle body of playing module, only with the specific termination condition of generation (as the user withdraw from, program end, fatal error etc.) time playing module just can withdraw from otherwise carry out this loop body always.
Claims (9)
1. insertion-type media player that is applied to network television-set top-set-box, comprise network interface unit, network processing unit, decoder, digital to analog converter, peripheral interface units, internal memory, it is characterized in that: also comprise by control module (11), network transmission protocol module (12), encapsulation format analysis module (13), intelligent buffer module (14), dsp interface module (15) and forming, and run on playing module (1) on the network processing unit (NP).It receives and the process IP media data by network interface, media data is sent to after DSP decodes again, and by analog-digital chip and audio-video interface audio-video signal is exported, and finishes the playing function of media program.
2. insertion-type media player according to claim 1 is characterized in that:
It is the software kit of core that described network processing unit (NP) has injected with built-in Linux operating system (22), comprises serial port drive module (23), infrared driver module (24), network-driven module (25), DSP driver module (26).
3. insertion-type media player according to claim 1 is characterized in that:
Described insertion-type media player uses an identical group interface function can support existing multiple network host-host protocol, also can support the new network transmission protocol.
4. insertion-type media player according to claim 1 is characterized in that:
Described insertion-type media player uses an identical group interface function can analyze existing multiple medium encapsulation format, also can analyze new medium encapsulation format.
5. insertion-type media player according to claim 1 is characterized in that:
Described insertion-type media player can be from local storage or network obtain decoding program and download among the DSP then.
6. insertion-type media player according to claim 1 is characterized in that:
Described insertion-type media player can be supported new media coding form by downloading decoding program in DSP.
7. insertion-type media player according to claim 1 is characterized in that:
Described intelligent buffer module (14) is judged the state of buffer area according to depositing data in the buffer area in, stably reads data in the buffer area in DSP, improves the not smooth phenomenon of decoding that causes because of the network traffics fluctuation.
8. insertion-type media player according to claim 1 is characterized in that:
Described insertion-type media player can utilize that DSP's show that at screen (OSD) function at video output screen displayed figure and Word message, includes but not limited to import response etc. as media name, media length, broadcast state, user.
9. insertion-type media player according to claim 1 is characterized in that:
The flow process of described insertion-type media player playing media program, its step (51-64) is:
Playing module starts (51), need to obtain the media program address (52) of broadcast, judge the network transmission protocol (53) that media program uses according to the media program address, the network transmission protocol module (54) of initialization correspondence, by network transmission protocol module and the media server of depositing media program connect (55), obtain the descriptor (56) of media program from media server, from the descriptor of media program, extract the encapsulation format information and the encoding format information (57) of media program, the encapsulation format analysis module (58) of initialization correspondence, initialization intelligent buffer module (59).Check the local corresponding decoding program (60) that whether exists, if do not have, download corresponding decoding program (61) to DSP from the procedure service device, start dsp operation decoding program (62), send play command (63) by network transmission protocol module to media server, playing module begins to receive processing media data (64).
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| CNA2005100276116A CN1893572A (en) | 2005-07-07 | 2005-07-07 | Insertion-type media player for use in network television-set top-set-box |
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| CN100533380C (en) * | 2007-11-30 | 2009-08-26 | 上海广电（集团）有限公司中央研究院 | Upgrade system and upgrade method based on DSP |
| CN101227594B (en) * | 2008-02-01 | 2010-07-14 | 深圳市迅雷网络技术有限公司 | On-line video playing control method, apparatus and on-line video player generating method |
| CN101895737A (en) * | 2010-07-13 | 2010-11-24 | 中兴通讯股份有限公司 | Multimedia decoding method and device as well as video monitoring method and system |
| CN102035700A (en) * | 2009-09-29 | 2011-04-27 | 鸿富锦精密工业（深圳）有限公司 | Digital content system |
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| CN101621403B (en) * | 2008-07-02 | 2011-11-30 | 中兴通讯股份有限公司 | Set top box multicast upgrading method |
| CN102469360A (en) * | 2010-11-17 | 2012-05-23 | 郑州威科姆科技股份有限公司 | Media data play method based on dual elementary stream (ES) interfaces in embedded system |
| CN101800894B (en) * | 2009-02-09 | 2012-06-27 | 纬创资通股份有限公司 | Method and system for converting and transmitting multimedia video and audio |
| CN102710411A (en) * | 2011-02-15 | 2012-10-03 | 佳能株式会社 | Network system, program set distribution method, distribution server, distribution server and control method |
| CN103024596A (en) * | 2012-12-25 | 2013-04-03 | 四川九洲电器集团有限责任公司 | Network media stream string playing method on basis of RTSP (real time streaming protocol) for set-top box of IPTV (internet protocol television) |
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| CN101227594B (en) * | 2008-02-01 | 2010-07-14 | 深圳市迅雷网络技术有限公司 | On-line video playing control method, apparatus and on-line video player generating method |
| CN101621403B (en) * | 2008-07-02 | 2011-11-30 | 中兴通讯股份有限公司 | Set top box multicast upgrading method |
| CN101800894B (en) * | 2009-02-09 | 2012-06-27 | 纬创资通股份有限公司 | Method and system for converting and transmitting multimedia video and audio |
| CN102035700A (en) * | 2009-09-29 | 2011-04-27 | 鸿富锦精密工业（深圳）有限公司 | Digital content system |
| WO2011069353A1 (en) * | 2009-12-08 | 2011-06-16 | 深圳市七彩虹科技发展有限公司 | Media player with low time base jitter |
| CN101895737A (en) * | 2010-07-13 | 2010-11-24 | 中兴通讯股份有限公司 | Multimedia decoding method and device as well as video monitoring method and system |
| CN102469360A (en) * | 2010-11-17 | 2012-05-23 | 郑州威科姆科技股份有限公司 | Media data play method based on dual elementary stream (ES) interfaces in embedded system |
| CN102710411A (en) * | 2011-02-15 | 2012-10-03 | 佳能株式会社 | Network system, program set distribution method, distribution server, distribution server and control method |
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