CN103297825A - Multi-media portable terminal for achieving terrestrial digital television - Google Patents
Multi-media portable terminal for achieving terrestrial digital television Download PDFInfo
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- CN103297825A CN103297825A CN2012100449933A CN201210044993A CN103297825A CN 103297825 A CN103297825 A CN 103297825A CN 2012100449933 A CN2012100449933 A CN 2012100449933A CN 201210044993 A CN201210044993 A CN 201210044993A CN 103297825 A CN103297825 A CN 103297825A
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Abstract
The invention discloses a multi-media portable terminal for achieving terrestrial digital television. Based on a DVB-T standard, the portable terminal with a small and medium size (7 cun to 17 cun) LCD utilizes cooperative work of two processors to achieve all functions of a set top box in different work modes, and the portable terminal has a television signal receiving, disposing and displaying function and provides multi-media functions for USB interfaces and Ethernet interfaces. A user who utilizes the multi-media portable terminal for achieving the terrestrial digital television to watch television does not have to sit in front of a television, high-quality digital television programs can be watched in a fixed mode, a mobile mode and a hand-held mode, and the multi-media portable terminal is convenient to use and flexible. In addition, due to the utilization of the processors, the function potential is large, and the user can obtain a wonderful program function and can enjoy other multi-media entertainment functions at the same time.
Description
Technical field
The present invention relates to the digital television techniques field, in particular, relate to a kind of realization terrestrial DTV multimedia portable terminal.
Background technology
Along with popularizing and development of Digital Television cause, panoramic set-top box has appearred on the market, the design of these set-top box only limits to function and outward appearance, the general user watches the terrestrial DTV program by the mode that set-top box connects television set, the decoding of the reception of digital television signal is just finished by set-top box, and the audio frequency and video demonstration is independently finished by television set.But along with popularizing of Digital Television, released the concept of digital TV integrated machine, set-top box is integrated in the television body, it has simplified input, output interface, reduces unnecessary software and hardware, makes compact conformation, system effectiveness height; All-in-one is exactly in fact the assembly of set-top box and television set, and the reception decoding of digital television signal and audio frequency and video are play no longer and handled with absolute version, and these work are finished by an all-in-one integral body.But for the terrestrial broadcasting of broadcast type transmission, can not bring into play easy-to-use, receive advantage easily, do not develop yet and convenience devices.
CMMB (the China Mobile Multimedia Broadcasting that current China promotes, the China Mobile multimedia broadcasting TV), be commonly called as mobile TV, be unique by the independent intellectual property right Mobile Multimedia Broadcasting mark of SARFT's promulgation for industry standard, via satellite and/or terrestrial wireless emission TV, the broadcast system of multi-media signals such as broadcasting and data message, though can solve the problem of portable terminal receiving digital broadcast TV programme admirably, but terminal market is only at receiving terminal screen little (below 7 cun), the ropy problem of display frame on large-screen.
Along with Development of Multimedia Technology, the maturation in consumption electronic product market, the user is more and more stronger to the product demand that media business more the more can be provided, therefore, need provide a kind of convenient, can watch the high definition broadcasts TV and support that the product of multimedia service is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
In view of this, the invention provides a kind of realization terrestrial DTV multimedia portable terminal, to overcome in the prior art owing to the branch of existing all-in-one as television set, develop to the large scale direction, do not consider that the user moves demand easily, and CMMB can't provide high definition, and terminal market is only at 7 cun mobile devices with sub-screen, again the problem that large-sized screen-picture effect will be very poor.
For achieving the above object, the invention provides following technical scheme:
A kind of realization terrestrial DTV multimedia portable terminal based on DVB-T (DMB-Terrestrial, terrestrial wireless) standard, carries small-medium size LCD (7 cun to 12 cun), comprising: first processor and second processor;
Described first processor is tv signal processor, embedded MCU (Micro Control Unit, micro-control unit), and the decoding that is used for finishing the input audio-video signal is handled, and plays to LCD and loud speaker, realizes TV functions;
Described second processor is the System on Chip/SoC of Digital Television, by the tuner circuit that be used for to receive signal that is attached thereto be used for smart card circuitry with the smart card communication, finish the terrestrial DTV business jointly, described tuner circuit is by antenna received RF signal and demodulation output transmission serial flow, described second processor is to receiving the stream demultiplexing, and the Voice ﹠ Video data that will utilize the smart card descrambling to cross are given decoder and are decoded, described second processor uses video encoder with decoded digital video signal conversion and plays, the embedded USB of described second processor and Ethernet controller, by described USB or described Ethernet interface, described second processor receives and handles multi-medium data;
Described first processor and described second processor are connected to FLASH separately, are used for the storage of program and parameter separately, and described first processor and described second processor are by the program designation among the FLASH separately, the program among the independent operating FLASH separately;
Described first processor is connected with E2PROM respectively by the I1C bus with described second processor, uses same E2PROM storage data jointly, and the data partition among the described E2PROM is enjoyed, the data block agreement visit of sharing;
Described first processor has built-in RAM, and what described second processor connected is the RAM chip of DDR2 interface at a high speed;
Described first processor links to each other with GPIO interface (general input/output interface) by YPBPR interface (color difference components interface) with described second processor.
Wherein, described first processor also connects audio frequency and video input interface, audio frequency and video power amplifier, panel button and remote controller, serial ports and power distribution circuit.
Wherein, described first processor connects the FLASH of SPI interface, and described second processor connects the FLASH of sdram interface.
Wherein, described two processors program among the FLASH that oneself connects of can upgrading respectively.
Wherein, described first processor is primary processor, be responsible for the model selection of finishing the work, the power distribution management, the battery charging and discharging management, and the button that receives user's operation handles with remote controller, filters out oneself use, and the described GPIO interface that passes through that described second processor is used is sent to described second processor.
Wherein, described mode of operation is specially: audio frequency and video input pattern, Digital Television mode of operation and audio frequency and video output mode, wherein:
Described audio frequency and video input pattern be described portable terminal as display device, described second processor is not worked, described first processor work is closed the circuit that described second processor power supply is connected with it by power configuration administration module control;
To be described portable terminal set as the all-in-one of audio/video decoding and demonstration described Digital Television mode of operation, described first processor and the described second processor full-load operation, described first processor is finished Digital Television and is received decoding, described second processor is shown to video on the LCD, plays to loud speaker after audio frequency is amplified;
Described audio frequency and video output mode is that described portable terminal is as the equipment of audio/video decoder, the audio, video data that receives is not play by LCD and loud speaker, the directly volume audio and video output interface output by being connected with described second processor, described first processor is by the power configuration administration module, close the LCD drive circuit, all devices that described second processor is finished digital television function work on power.
Via above-mentioned technical scheme as can be known, compared with prior art, the invention discloses a kind of realization terrestrial DTV multimedia portable terminal, based on the DVB-T standard, carry the portable terminal of small-medium size LCD (7 cun to 12 cun), use two processor collaborative works, under different mode of operations, the all functions of existing set-top box have been realized, possess existing TV signal and receive the processes and displays function, USB is provided, the multimedia function of Ethernet interface adopts user's TV reception of the present invention to there is no need to be sitting in face of the television set, fixing, move and hand and all can watch high-quality digital television program, convenient, flexible; In addition, owing to used multiprocessor, the function potentiality are big, and the user can also enjoy other multimedia recreation functions when obtaining the highlight function.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiments of the invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to the accompanying drawing that provides.
Fig. 1 is the disclosed a kind of Organization Chart of realizing terrestrial DTV multimedia portable terminal of the embodiment of the invention;
Fig. 2 is the flow chart of the disclosed a kind of multimedia portable terminal switching working mode of the embodiment of the invention;
Fig. 3 is the disclosed a kind of operational data flow direction figure that realizes terrestrial DTV multimedia portable terminal of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The invention discloses a kind of realization terrestrial DTV multimedia portable terminal, based on the DVB-T standard, carry the portable terminal of small-medium size LCD (7 cun to 12 cun), use two processor collaborative works, under different mode of operations, the all functions of existing set-top box have been realized, possess existing TV signal and receive the processes and displays function, USB is provided, the multimedia function of Ethernet interface, adopt user's TV reception of the present invention to there is no need to be sitting in face of the television set, fixing, move and hand and all can watch high-quality digital television program, convenient, flexible; In addition, owing to used multiprocessor, the function potentiality are big, and the user can also enjoy other multimedia recreation functions when obtaining the highlight function.
See also accompanying drawing 1, for the invention discloses a kind of structure chart of realizing terrestrial DTV multimedia portable terminal; A kind of realization terrestrial DTV multimedia portable terminal disclosed by the invention specifically comprises:
The present invention uses two processor collaborative works, and wherein first processor 101 is tv signal processor, embedded MCU (Micro Control Unit, micro-control unit); Support is from PC (personal computer), field camera, GPS equipment (Global Positioning System, global positioning system) Shu Chu VGA (Video Graphics Array, Video Graphics Array) rgb signal of interface (Red Green Blue, R-G-B signals); Support conventional television apparatus or HDTV (High Definition Television, HDTV (High-Definition Television)) Shu Chu YPBPR (color difference components interface), Y/C (component vide), CVBS signal (Composite Video Broadcast Signal, composite video broadcast singal); Support the output of CCIR656 (ITU-R BT.656, digital interface standard) numeral simultaneously; The video input standard that can support comprises NTSC (National Television System Committee, the national television system standard), PAL (Phase Alternating Line, Phase Alternate Line) and SECAM (Sequentiel Couleur A Memoire, forsequential color transmit and the storage standard); Have LCD Interface, support the TCON screen of TTL (Transistor-Transistor Logic, logic gates)/TCON (Timer Control Register, timer control register) digital screen or simulation; Has OSD (On-Screen Display on-screen menu) simultaneously, Scalar (video scaling) function.The first processor 101 embedded MCU that this programme uses, make first processor 101 possess the ability of independent operating and control, the function that cooperates self OSD and Scalar, the control peripheral circuit is finished multiple mode of operation described later in this programme with 102 coordinations of second processor; The support of liquid crystal interface makes this programme compact conformation, and exploitation is quick, stable performance; Abundant interface input form, multiple standard is identified automatically, and this programme product versatility, flexibility are not fully exerted.
Second processor 102 is the System on Chip/SoC of Digital Television, integrated high definition picture, sound and the required all functions of image handled on the chip piece, can handle MPEG2, H.264 with compression such as VC-1 form, built-in USB2.0 master control, Ethernet controller, and can support up-to-date advanced security specification and abundant the application.Use the DDR2 interface to link to each other with external memory storage, stand-by power consumption, that full speed operates the work power consumption is all very little.
Two processors are connected to a FLASH separately for the storage of program and parameter separately.First processor 101 connects the FLASH of SPI interface, and second processor 102 connects the FALSH of sdram interface.After powering on, two processors are by the program designation among the FLASH that connects separately, and independent operating connects the program among the own FLASH separately, and can upgrade respectively program among the FLASH of oneself connection of two processors.Two the same E2PROM storage of the common use of processor data have reduced wiring and components and parts.Use the I2C bus that two processors are connected with E2PROM, the data partition in the E2PROM is enjoyed, the data block agreement visit of sharing.First processor 101 has built-in RAM, need not meet RAM in addition, and what second processor 102 connected is the RAM chip of DDR2 interface at a high speed.
First processor 101 connects audio frequency and video input interfaces (VGA, YPBPR, Y/C, CVBS, CCIR656), audio frequency power amplifier treatment circuit, LCD panel, serial ports, panel button and remote controller, power distribution management circuit, and links to each other with second processor 102 with GPIO (the general input/output interface of General Purpose Input Output) by YPBPR interface (color difference components interface).First processor 101 is finished the decoding of input audio-video signal is handled, and plays to LCD and loud speaker, realizes TV functions; First processor 101 is responsible for the model selection of finishing the work as primary processor, power distribution management, battery charging and discharging management; And the button that receives user's operation handles with remote controller, filters out oneself use, and the GPIO that passes through that second processor 102 is used sends to second processor 102.Can the program among the FLASH be upgraded by being connected to the serial ports on the processor.
First processor 101 can be imported multiple audio frequency and video source, because the interface panel space is limited, can only introduces a kind of audio frequency and video source, thereby adopt configurable input form, according to the side panel of user's needs configuration band distinct interface.Software can adapt to automatically, disposes what hardware interface, connects what equipment, and software is differentiated automatically and is arranged to this kind input, under the motionless situation of software and hardware, can meet the needs of different users flexibly.Form of power is various, and standard configuration 110～250AC changes the power supply adaptor of DC 10V1A, can use having under the situation of civil power, can use the direct current of 10V, and the 12VDC that equipment such as automobile provide also can use.The portable requirement that provides is provided built-in lithium battery, and the working power of the continuation of the journey more than 4 hours can be provided, and is not having civil power, the undesirable or hand-held situation of watching of power supply to use.Which power supply first processor 101 controls select, and in good time to battery charge.Because portable terminal adopts powered battery, for improving the service time of battery, terminal should be able to be turned off a part of receiving circuit to save power consumption.Adopt a kind of multistage power management, in specific operation mode, not influencing under this mode of operation function situation, turn off obsolete part power supply.
Second processor 102 is by the tuner circuit that be used for to receive signal that is attached thereto and be used for smart card circuitry with the smart card communication, finishes the terrestrial DTV related service jointly.Tuner receives radiofrequency signal and demodulation output transmission serial flow by antenna, 102 pairs of second processors receive the stream demultiplexing, and the Voice ﹠ Video data that will utilize the smart card descrambling to cross are given decoder and are decoded, second processor 102 uses video encoder that decoded digital video signal is converted to the YPbPr signal, sending first processor 101 to plays, perhaps use video encoder that decoded digital video signal is converted to the AV signal, export to miscellaneous equipment and play.Second processor 102 is connected to USB or Ethernet interface, receives and handle multi-medium data by their second processors 102.
Tuner uses the silicon tuner of tuner and demodulator one, has littler overall dimension and higher sensitivity, and built-in aerial and external antenna can be selected.
Scheme is used the Smart Card of Mini SIM size, size conforms ISO7810ID-000, and the contact contact then meets the regulation of 7816 pairs of ID-1 types of ISO IC-card.25 millimeters * 15 millimeters size, volume is little, is fit to mobile device.Multiple supporting deck is arranged, technology maturation on the market.The design of ingenious surface structure, the user uses more flexible, can be convenient, hand-holdable, can in movement, use, again fixedly use.Need not install, debug easy for installation.
Mode of operation comprises: AVI, AVO, DTV.Wherein, AVI (Audio Video Input) pattern, the audio frequency and video input pattern, this pattern is used this multimedia terminal as display device.Under this mode of operation, second processor 102 can not worked, and has only first processor 101 work.After entering this pattern, the embedded software of first processor 101 scans each interface, and the audio frequency and video output equipment of search subscriber access is searched synchronizing signal automatically automatically.In case first processor 101 confirms to have equipment to insert, and selects correct parameter, and adapts to the standard of input signal automatically.After entering the AVI pattern, first processor 101 is by the power configuration administration module, and the circuit that second processor, 102 power supplys are connected with it is closed in control, can cut off the power supply of the device of more than half consumed power at this moment, is the operating state of power saving.
DTV (Digital TV), the Digital Television mode of operation, this pattern is used the all-in-one of this multimedia terminal as audio/video decoding and demonstration.First processor 101 and the equipment full-load operation that second processor 102 is connected are the operating states of consumes power.First processor 101 is finished Digital Television and is received decoding, and second processor 102 is responsible for video is shown on the LCD, plays to loud speaker after audio frequency is amplified.
AVO (Audio Video Output), the Digital Television mode of operation, this pattern is used this multimedia terminal as audio/video decoder.The audio, video data that receives is not play by LCD and loud speaker, directly the audio and video output interface output by being connected with processor.First processor 101 is closed LCD and is driven relevant road by the power configuration administration module.All devices that second processor 102 is finished digital television function work on power.
The design of employing multi-operation mode, different mode of operations is finished in two processor chips collaborative works jointly.Pattern is selected by the user, as main frame, judges that control enters different pattern work by first processor 101, and the coordinated allocation different resource sees also accompanying drawing 2, is the flow chart of a kind of multimedia portable terminal switching working mode disclosed by the invention; The invention discloses a kind of flow process of multimedia portable terminal switching working mode, enter this flow process at every turn, first processor 101 judges whether to enter the DTV mode of operation, if, will open the power supply of second processor 102, and the digital television function related device powered on, going to judge whether is the AVO pattern again, if not the drive circuit that will open LCD; Judge it is not when entering the DTV pattern when first processor 101, will open LCD and speaker circuit and use for first processor 101.This programme latter two processor chips that power on are moved program separately respectively, for giving full play to the processor ability, two processors respectively provide an OSD (On-Screen Display on-screen menu) and user interactions, two OSD options do not conflict, and content is set can intercommunication, by a cover button and remote controller control, friendly interface, user-friendly, the rear board support can multiplely arrange, and can use in multiple occasion.
See also accompanying drawing 3, be a kind of operational data flow direction figure that realizes terrestrial DTV multimedia portable terminal disclosed by the invention; When audio-video signal is imported, audio, video data input first processor 101, first processor 101 decoding rear drive LCD, and transfer to loud speaker by audio power amplifier circuit and play.
Data flow is during from the DVB-T signal of antenna, introduces second processor 102 after tuning, the demodulation by tuner, through demultiplexing, descrambling, decoding.May generate the YPbPr signal by first processor 101 videos coding and reach first processor 101 this moment, is played to LCD and loud speaker; Also can directly by audio-video interface first processor 101 videos coding be generated the AV signal inserts in other playing audio/video.
Data flow enters second processor 102 by USB or Ethernet, by the control of second processor, 102 software decodes, can generate the YPbPr signal by first processor 101 videos coding and reach first processor 101, is played to LCD and loud speaker; Also can directly by audio-video interface first processor 101 videos coding be generated the AV signal inserts in other playing audio/video.
First processor 101 is Main Processor Unit, selects mode of operation, two processor collaborative works in case of necessity by first processor 101.Under the DTV mode of operation, the YPbPr signal of second processor, 102 outputs sends in the first processor 101.First processor 101 receives button or remote controller, filters the response that oneself needs, and sends second processor 102 to by the GPIO custom protocol.The mutual content of first processor 101 and second processor 102 comprises output parameter such as volume, language setting, display position size, osd information; Lcd screen relevant parameter such as contrast, brightness, color, backlight; System's operation desired parameters operating state, current program etc.Interactive mode can be used I2C, GPIO, UART, the content in simultaneously can sharing E 2PROM.
In sum: compared with prior art, the invention discloses a kind of realization terrestrial DTV multimedia portable terminal, based on the DVB-T standard, carry the portable terminal of small-medium size LCD (7 cun to 12 cun), use two processor collaborative works, under different mode of operations, the all functions of existing set-top box have been realized, possess existing TV signal and receive the processes and displays function, USB is provided, the multimedia function of Ethernet interface, adopt user's TV reception of the present invention to there is no need to be sitting in face of the television set, fixing, move and hand and all can watch high-quality digital television program, convenient, flexible; In addition, owing to used multiprocessor, the function potentiality are big, and the user can also enjoy other multimedia recreation functions when obtaining the highlight function.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. realize terrestrial DTV multimedia portable terminal for one kind, it is characterized in that, based on DVB-T (DMB-Terrestrial, terrestrial wireless) standard, carry small-medium size LCD (7 cun to 12 cun), comprising: first processor and second processor;
Described first processor is tv signal processor, embedded MCU (Micro Control Unit, micro-control unit), and the decoding that is used for finishing the input audio-video signal is handled, and plays to LCD and loud speaker, realizes TV functions;
Described second processor is the System on Chip/SoC of Digital Television, by the tuner circuit that be used for to receive signal that is attached thereto be used for smart card circuitry with the smart card communication, finish the terrestrial DTV business jointly, described tuner circuit is by antenna received RF signal and demodulation output transmission serial flow, described second processor is to receiving the stream demultiplexing, and the Voice ﹠ Video data that will utilize the smart card descrambling to cross are given decoder and are decoded, described second processor uses video encoder with decoded digital video signal conversion and plays, the embedded USB of described second processor and Ethernet controller, by described USB or described Ethernet interface, described second processor receives and handles multi-medium data;
Described first processor and described second processor are connected to FLASH separately, are used for the storage of program and parameter separately, and described first processor and described second processor are by the program designation among the FLASH separately, the program among the independent operating FLASH separately;
Described first processor is connected with E2PROM respectively by the I1C bus with described second processor, uses same E2PROM storage data jointly, and the data partition among the described E2PROM is enjoyed, the data block agreement visit of sharing;
Described first processor has built-in RAM, and what described second processor connected is the RAM chip of DDR2 interface at a high speed;
Described first processor links to each other with GPIO interface (general input/output interface) by YPBPR interface (color difference components interface) with described second processor.
2. portable terminal according to claim 1 is characterized in that, described first processor also connects audio frequency and video input interface, audio frequency and video power amplifier, panel button and remote controller, serial ports and power distribution circuit.
3. portable terminal according to claim 1 is characterized in that, described first processor connects the FLASH of SPI interface, and described second processor connects the FLASH of sdram interface.
4. portable terminal according to claim 1 is characterized in that, described two processors program among the FLASH that oneself connects of can upgrading respectively.
5. portable terminal according to claim 1, it is characterized in that, described first processor is primary processor, be responsible for the model selection of finishing the work, the power distribution management, the battery charging and discharging management, and receive button and the remote controller processing that the user operates, filter out and oneself use, the described GPIO interface that passes through that described second processor is used is sent to described second processor.
6. portable terminal according to claim 5 is characterized in that, described mode of operation is specially: audio frequency and video input pattern, Digital Television mode of operation and audio frequency and video output mode, wherein:
Described audio frequency and video input pattern be described portable terminal as display device, described second processor is not worked, described first processor work is closed the circuit that described second processor power supply is connected with it by power configuration administration module control;
To be described portable terminal set as the all-in-one of audio/video decoding and demonstration described Digital Television mode of operation, described first processor and the described second processor full-load operation, described first processor is finished Digital Television and is received decoding, described second processor is shown to video on the LCD, plays to loud speaker after audio frequency is amplified;
Described audio frequency and video output mode is that described portable terminal is as the equipment of audio/video decoder, the audio, video data that receives is not play by LCD and loud speaker, the directly volume audio and video output interface output by being connected with described second processor, described first processor is by the power configuration administration module, close the LCD drive circuit, all devices that described second processor is finished digital television function work on power.
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| CN103297825B (en) | 2018-01-23 |
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