CN101790030A - Digital set top box based on Java processor - Google Patents
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Abstract
The invention discloses a digital set top box based on a Java processor, comprising a set top box mainboard and a Java processing module that are generally used at present. The set top box uses the Java processing module as a co-processing core and the function of processing the Java program by hardware is realized on the digital television set top box so as to efficiently operate local or online Java games and Java application program. The Java processing module can be realized by adopting a Java processor, a memory and an Ethernet interface inlayed in the set top box mainboard, wherein the Java processor adopts a Java SoC (System on Chip) processor (VP6000) or other Java dedicated processors as the coprocessor of the set top box mainboard. By adopting the Java processor, the invention realizes that the local or online Java games and Java application program on the television set top box can be rapidly and smoothly operated, thereby greatly improving the interactivity and entertainment of the television set top box and ensuring that the design of the television set top box is more intellectualized and humanized.
Description
Technical field
The present invention relates to a kind of new architecture of the digital home entertainment equipment based on Java application specific processor technology, specifically, relate to a kind of digital TV set-top box based on Java application specific processor technology.
Background technology
Along with the arrival in digital home's epoch, people day by day improve for the requirement of quality of life, require the household electrical appliance intellectuality in many aspects, can be good at meeting consumers' demand, and reach better satisfaction.
Digital TV set-top box on the existing market is on structure, generally by tuning demodulator, master chip, internal memory, peripheral interface circuit, Conditional Access interface CA (Conditional Access) with look audio frequency output etc. is several most ofly to be constituted; On logic function, generally be divided into tuning demodulation module, look the audio decoder module, the video encoding module, look audio frequency output module and control circuit module.Control circuit is made up of host CPU, program storage, data storage, bus driver and various peripheral interface circuit, it is the control centre of set-top box, the control circuit significant feature is control and the work of coordinating the each several part circuit, finish the various functions of machine according to the program of design, and carry out human-computer dialogue in the user by guidance panel interface and IR remote controller.
But existing digital TV set-top box, handle some carry or network on the Java recreation or during java application, all occur certain delay or stagnation, cause the not smooth of picture, influenced the interactive and recreational of digital TV set-top box.
Summary of the invention
At above deficiency, the invention provides a kind of more enough interactive and recreational digital TV set-top box of submitting set-top box greatly to based on Java processor technology.
Top box of digital machine based on the Java processor of the present invention comprises the set-top box mainboard, and a Java processing module that is used for directly efficient operation Java recreation and java application, and described Java processing module and set-top box mainboard communicate.
Described Java recreation and java application comprise the Java recreation and the java application of this locality or network.
Described Java processing module is one to be embedded in the set-top box expansion board of set-top box mainboard, described set-top box expansion board comprises Java processor, internal memory and Ethernet interface, the set-top box expansion board is at first passed through the control command information and the data of Ethernet interface receiving set up box mainboard, by Java processor operation Java recreation and java applet, return to the set-top box mainboard by instruction and the result data that Ethernet interface will be handled again then.
Described Java processor is a Java SoC processor, and it comprises: directly operation is by the Java nuclear VP6000 of the Java bytecode program of standard Java compiler generation; Use AMBAAHB bus connection processing device nuclear and memory controller, adopt the APB bus that the AMBA bus of the simple and easy interconnection of low-power consumption is provided for the low-speed peripheral of system; Be used for storing the unify memory of file system of start-up routine, real-time oss; The dma controller, Ethernet interface, SPI and the I that provide for the range of application of expansion Java processor
2C interface.
Described Java processing module is the Java application specific processor, described Java application specific processor as coprocessor directly and the set-top box mainboard communicate.
Described set-top box mainboard comprises: 1) tuning demodulator: the modulated digital signal demodulation that is used for transmitting is reduced into transport stream; 2) master chip: at first the flag information that transmits according to transport stream carries out demultiplexing to the transport stream that receives, the descrambling information that is transmitted according to the CA smart card carries out descrambling to program stream then, TS stream behind the descrambling is delivered in the video-audio decoder and respectively it is decoded, being reduced into the AV signal exports, simultaneously, also isolate multiplexing sorts of systems tables of data in transport stream, give the set-top box processes device and export respectively; 3) internal memory: be used for storing systems soft ware, drive software, application program, user profile and the application data of set-top box, and software contained on it upgraded by online mode; 4) peripheral interface circuit: comprise External memory equipment and the interface that communicates back, also comprise RS232 interface, Infrared remote controller interface, Wireless Keyboard interface and Wi-Fi interface; 5) intelligent card interface: read data in the CA smart card by card reader, be used for the descrambling of digital television program; 6) look audio frequency output: finish video filtering and audio frequency and amplify.
Beneficial effect of the present invention: the present invention can directly realize quick, smooth operation TV set-top box this locality or recreation of the Java on the network and java application by the Java processing module, greatly improve the interactive and recreational of TV set-top box, make the design intellectuality and the hommization more of TV set-top box.
Description of drawings
Fig. 1 is the structural representation of the enforcement one of set-top box of the present invention;
Fig. 2 is the structural representation of the set-top box expansion board of the invention process one;
Fig. 3 is the structural representation of the invention process one Java SoC processor;
Fig. 4 is the structural representation of the invention process two.
Embodiment
Below in conjunction with accompanying drawing the present invention is further set forth.
The present invention is based on the top box of digital machine of Java processor, it adds Java application specific processor technology on control circuit on the geostationary basis of other modules of original set-top box, specifically can be divided into embedding mainboard mode and two kinds of embodiments of coprocessor mode.
As depicted in figs. 1 and 2, the top box of digital machine that embeds the Java processor of mainboard mode comprises set-top box mainboard and the set-top box expansion board (Java processing module) that is embedded in the set-top box mainboard, the set-top box expansion board comprises Java processor, internal memory and Ethernet interface, the set-top box expansion board is at first passed through the control command information and the data of Ethernet interface receiving set up box mainboard, by Java processor operation Java recreation and java applet, return to the set-top box mainboard by instruction and the result data that Ethernet interface will be handled again then.
The set-top box mainboard can adopt general technological means now, and promptly it comprises:
1) tuning demodulator: the effect of tuning demodulator is that the modulated digital signal demodulation that will transmit is reduced into transport stream, the difference of tuning demodulator has just constituted different top box of digital machines, for example be used for the QPSK demodulation satellite set top box (DVB-S), be used for the wired digital set-top box (DVB-C) of QAM demodulation and be used for terrestrial transmission top box of digital machine (DVB-T) demodulator of OFDM demodulation.
2) master chip: along with the development of chip technology, More and more factories is integrated in the function of set-top box in the master chip more, and for example present most of manufacturer all is integrated in CPU, decoder, demodulation multiplexer, graphic process unit and video-audio processor in the master chip.In master chip, at first the flag information that transmits according to transport stream carries out demultiplexing to the transport stream that receives, the descrambling information that is transmitted according to the CA smart card carries out descrambling to program stream then, TS stream behind the descrambling is delivered in the video-audio decoder and respectively it is decoded, being reduced into the AV signal exports, simultaneously, also isolate multiplexing sorts of systems tables of data in transport stream, give the set-top box processes device and export respectively.
3) internal memory: internal memory mainly is divided into Flash internal memory and sdram memory.Flash is used for storing systems soft ware, drive software, application program and some user profile of set-top box, content also can keep when system cut-off, Flash can upgrade software contained on it by online mode simultaneously, reaches the purpose of updating set-top box software; SDRAM is used for storing applied data.Many functions of set-top box all need internal memory to realize, for example graphics process, look audio decoder and demultiplexing etc., different application demands, the size configure of internal memory also has nothing in common with each other.
4) peripheral interface circuit: peripheral interface circuit generally comprises: a. External memory equipment (external hanging type hard disk); B. the interface (communication interfaces such as network adapter and modulator-demodulator) that communicates back is used to satisfy the user information is passed back to front end, improves interactivity; C. other equipment interfaces (as RS232 interface, Infrared remote controller interface, Wireless Keyboard interface and Wi-Fi interface etc.).
5) intelligent card interface: read the descrambling that data in the CA smart card are used for digital television program by card reader, also adopt general-purpose interface CI (Common Interface) to finish the reading of CA smart card among some STB, CI is one and is organized as the standard interface that defines between the hardware module of set-top box and separation by DVB
6) look audio frequency output: mainly finish functions such as video filtering and audio frequency amplification.
At embedding the mainboard mode, the IDART Lab of Zhongshan University has successfully realized based on Java processor set-top box expansion mainboard---Java SoC processor (VP6000), as shown in Figure 3, the basic structure of JavaSoC processor comprises Java nuclear VP6000, AMBA bus system, accumulator system and dma controller/Ethernet interface/SPI/I
2C interface.This processor is based upon on the AMBA bus basis, and extensibility is good, can have the processor of AMBA bus interface by compatible other.Adopt the SoC chip of 0.25 micrometre CMOS process, dominant frequency be 100MHz, power consumption less than 100mW, the construction cycle is short, cost is lower, is fit to drop into middle and low-end market and uses.Java SoC processor design have 4 grades of flowing water CPU processor VP6000, AMBA bus processor, support SDRAM, SRAM, NAND FLASH and the NOR FLASH memory interface processor of variable bit width and Ethernet, SPI and I
2Peripheral Interface processors such as C are designed to complete SoC system.
Java nuclear VP6000 can directly move the Java bytecode program that is generated by standard Java compiler.It is articulated on the AMBA bus system by the ahb bus interface, fetches byte code instruction (Bytecode Instructions), storehouse (StackA and B) top data and a large amount of control signals (Control Signals) from memory module.Java nuclear VP6000 is the microprocessor of full flowing structure, it propose a kind of novelty with the approach of Java command mappings to self micro-code instruction, and micro-code instruction can be finished in the monocycle.
Java SoC processor uses AMBA ahb bus connection processing device nuclear and memory controller and other high-speed cells, adopt the APB bus to provide the simple and easy interconnection of low-power consumption for the low-speed peripheral of system, the bridger between system bus and the peripheral bus provides access agent and the buffering between AHB parts and APB parts.
Along with the deep submicron process technology is increasingly mature, the scale of integrated circuit (IC) chip is increasing.The method for designing of numeral IC from driving based on sequential develops into the method for designing based on IP reuse, and obtained extensive use in the SoC design.In SoC design based on IP reuse, the on-chip bus design is the problem of most critical, for this reason, a lot of on-chip bus standards have appearred in industry, wherein, be subjected to numerous IP developer and SoC system integration person's favor by the AMBA on-chip bus of ARM company release, become structure on a kind of popular industrial standard sheet, the AMBA standard has mainly comprised AHB system bus and APB peripheral bus, and AMBA on-chip bus AMBA 2.0 standards comprise four part: AHB, ASB, APB and Test Methodology.The interconnecting of AHB adopted and traditional had primary module and from the shared bus of module, interface separates with interconnect function, and this is significant to the interconnection between the chip upper module.AMBA has been not only a kind of bus, a kind of especially interconnection system that has interface module.
Based on the SOC (system on a chip) of AMBA, the module that great majority hang on the bus is the functional module of single attribute: primary module or from module, primary module is to the module of sending read-write operation from module, and as CPU, DSP etc.; From module is the module that takes orders and make a response, as the RAM on the sheet, and AHB/APB bridge etc.In addition, also have some modules to have two kinds of attributes simultaneously, for example direct memory access (DMA) (DMA) is from module when being programmed, but must primary module when reading to transmit data in system, if there are a plurality of primary modules on the bus, just need moderator to decide and how to control of the visit of various primary modules bus, 16 primary modules and a plurality of from module arbitrarily can be arranged at most on the ahb bus, if the primary module number greater than 16, then need add one deck structure again.The APB bridge is a primary module unique on the APB bus, also be on the AHB system bus from module, its major function is address, data and the control signal that latchs from the AHB system bus, and provide the selection signal of two-stage decode, thereby realize of the conversion of AHB agreement to the APB agreement with generation APB ancillary equipment.
Memory is used for storing start-up routine, the real-time oss file system of unifying, it comprises: 1) normal memory controller (RAM and ROM on NOR Flash, SRAM, SDRAM, the sheet), NOR Flash be used for storing start-up routine, microcode table, address offset amount mapping table, class loader with the RTOS start-up routine, ROM is used for the stores low level start-up routine on the sheet, RAM is used for dynamic memory microcode table and address offset amount mapping table on the sheet, SRAM is used for storing large-scale java application and system's runtime data, and SDRAM is the same with the SRAM function.These five kinds of memories are unified addressing, and wherein, NOR Flash is 8, and SDRAM is 16, and SRAM and NORFLASH address wire and data wire can be multiplexing, compatible 8 and 16.2) NAND FLASH controller, NAND FLASH is used for storing RTOS and file system, and NAND Flash has obtained using widely in modern digital product with the cost performance of its superior characteristic and Geng Gao.Integrated NAND Flash controller becomes a kind of trend in on-chip system chip, Java SoC processor is by the data transfer mode of direct memory access (DMA), make the message transmission rate of NAND Flash obtain certain raising, satisfied the designing requirement of practical application.
Be the range of application of expansion Java processor, this Java SoC processor provides dma controller, Ethernet interface, SPI and I
2C interface.This processor provides Ethernet interface, to satisfy the network application scope of Java processor; SPI is a kind of serial synchronous communication agreement, form by a main equipment and one or more slave unit, main equipment starts a synchronous communication with slave unit, thereby finish the exchange of data, the SPI interface is by SDI (serial data input), SDO (serial data output), (four kinds of signals of serial shift clock and CS (from enable signal) constitute SCK, CS has determined unique slave unit of communicating by letter with main equipment, as there is not a CS signal, then can only there be a slave unit, main equipment is initiated communication by producing shift clock, during communication, data are exported by SDO, the SDI input, data are exported by SDO at the rising or the trailing edge of clock, read in by SDI in back to back decline or rising edge,, finish the transmission of 8 or 16 bit data like this through the change of 8 or 16 clocks; I
2The C bus is the universal serial bus that is made of data wire SDA and clock SCL, can transmit and receive data, be used to connect microcontroller and ancillary equipment thereof, between CPU and the controlled module, carry out two-way transmission between module and the module, various Be Controlled modules all are connected in parallel on this bus, each module all has unique address, in the transmission of Information process, and I
2On the C bus and each modular circuit that connects be main controller (or controlled device), be again transmitter (or receiver), this depends on the function that it will be finished, though each control circuit hang on same the bus, independently of one another, uncorrelated mutually, I
2The C bus has three types of signals in transmitting data procedures, they are respectively: commencing signal, end signal and answer signal have all integrated I on a lot of semiconductor integrated circuit at present
2C interface, a lot of peripheral components such as memory, monitoring chip etc. also provide I
2C interface is so this processor also provides I
2C interface.
The workflow of the top box of digital machine of embedded Java processor is: after system powers on, Java processor in the expansion board, internal memory and Ethernet interface all are in wait state, the user selects Game Menu by guidance panel or remote controller, enter after the Game Menu, after choosing certain recreation, handle through master chip, by Ethernet control command information and data are passed to the Java processor, the Java processor is started working then, mode of operation is as operation Java recreation or java applet, after the intact instruction of Java processor processing result data etc. is returned to master chip by Ethernet again, after handling, master chip shows on television set that by the audio frequency and video output module this has just realized " man-machine interaction ".In a word, the user repeats above-mentioned flow process up to game over always after selecting Game Menu, and Java processor, internal memory and Ethernet interface in the expansion board are all got back to wait state.
As Fig. 4 is the top box of digital machine based on the Java processor of coprocessor mode, it comprises set-top box mainboard and Java processing module, the set-top box mainboard adopts present current techique (with embedded identical), the Java processing module adopts the Java application specific processor, the Java application specific processor as coprocessor directly and the set-top box mainboard communicate.The set-top box master chip is receiving the user when selecting game mode, gives the enable signal of Java application specific processor as coprocessor, starts this Java application specific processor.
The workflow based on the top box of digital machine of Java processor of coprocessor mode:
After system powers on, the Java application specific processor is in wait state, the user selects Game Menu by guidance panel or remote controller, enter after the Game Menu, after choosing certain recreation, handle, pass to the Java application specific processor by the master chip control signal through master chip, the Java application specific processor is started working then, and mode of operation is as operation Java recreation or java applet.The Java application specific processor is handled after the instruction result data etc. is returned to master chip again, shows on television set that by the audio frequency and video output module repeat above-mentioned flow process up to game over, the Java application specific processor is got back to wait state after master chip is handled.Different with the embedded main board mode is, in the internal memory that the Java games of coprocessor mode and java application are placed on former set-top box, be among the SDRAM, and the embedded main board mode both can be placed on Java games and java application in the internal memory of former set-top box, can be placed among the Flash of expansion board again.
Claims (6)
1. top box of digital machine based on the Java processor, it comprises the set-top box mainboard, it is characterized in that it also comprises a Java processing module that is used for directly efficient operation Java recreation and java application, described Java processing module and set-top box mainboard communicate.
2. the top box of digital machine based on the Java processor according to claim 1 is characterized in that, described Java recreation and java application comprise the Java recreation and the java application of this locality or network.
3. the top box of digital machine based on the Java processor according to claim 1 and 2, it is characterized in that, described Java processing module is one to be embedded in the set-top box expansion board of set-top box mainboard, described set-top box expansion board comprises Java processor, internal memory and Ethernet interface, the set-top box expansion board is at first passed through the control command information and the data of Ethernet interface receiving set up box mainboard, by Java processor operation Java recreation and java applet, return to the set-top box mainboard by instruction and the result data that Ethernet interface will be handled again then.
4. the top box of digital machine based on the Java processor according to claim 3 is characterized in that, described Java processor is that Java SoC processor comprises:
Directly operation is by the Java nuclear VP6000 of the Java bytecode program of standard Java compiler generation;
Use AMBA ahb bus connection processing device nuclear and memory controller, adopt the APB bus that the AMBA bus of the simple and easy interconnection of low-power consumption is provided for the low-speed peripheral of system;
Be used for storing the processor piece built-in storage of the start-up routine, bytecode, microcode look-up table and the microcode instruction set that import from the outside;
The dma controller, Ethernet interface, SPI and the I that provide for the range of application of expansion Java processor
2C interface.
5. the top box of digital machine based on the Java processor according to claim 2 is characterized in that, described Java processing module is the Java application specific processor, described Java application specific processor as coprocessor directly and the set-top box mainboard communicate.
6. according to claim 2 or 5 described top box of digital machines, it is characterized in that described set-top box mainboard comprises based on the Java processor:
1) tuning demodulator: the modulated digital signal demodulation that is used for transmitting is reduced into transport stream;
2) master chip: at first the flag information that transmits according to transport stream carries out demultiplexing to the transport stream that receives, the descrambling information that is transmitted according to the CA smart card carries out descrambling to program stream then, TS stream behind the descrambling is delivered in the video-audio decoder and respectively it is decoded, being reduced into the AV signal exports, simultaneously, also isolate multiplexing sorts of systems tables of data in transport stream, give the set-top box processes device and export respectively;
3) internal memory: be used for storing systems soft ware, drive software, application program, user profile and the application data of set-top box, and software contained on it upgraded by online mode;
4) peripheral interface circuit: comprise External memory equipment and the interface that communicates back, also comprise RS232 interface, Infrared remote controller interface, Wireless Keyboard interface and Wi-Fi interface;
5) intelligent card interface: read data in the CA smart card by card reader, be used for the descrambling of digital television program;
6) look audio frequency output: finish video filtering and audio frequency and amplify.
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| CN113312182A (en) * | 2021-07-27 | 2021-08-27 | 阿里云计算有限公司 | Cloud computing node, file processing method and device |
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