CN1144450C - Software architcture for television set-top terminal providing compatibility with multiple operating environments - Google Patents

Software architcture for television set-top terminal providing compatibility with multiple operating environments Download PDF

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Publication number
CN1144450C
CN1144450C CNB008092079A CN00809207A CN1144450C CN 1144450 C CN1144450 C CN 1144450C CN B008092079 A CNB008092079 A CN B008092079A CN 00809207 A CN00809207 A CN 00809207A CN 1144450 C CN1144450 C CN 1144450C
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China
Prior art keywords
software
core
layer
interface
operating
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CNB008092079A
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Chinese (zh)
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CN1357194A (en
Inventor
杰克・M・比恩鲍姆
杰克·M·比恩鲍姆
・德尔索尔多
克里斯·德尔索尔多
・高兹道
罗伯特·高兹道
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Arris Technology Inc
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General Instrument Corp
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00Arrangements for program control, e.g. control units
    • G06F9/06Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44Arrangements for executing specific programs
    • G06F9/455Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4437Implementing a Virtual Machine [VM]

Abstract

A software architecture is provided to enable core television set-top software (20) to run in different operating environments. A kernel abstraction component (18) uses kernel calls and kernel-specific translations to abstract operating system-specific functions from an operating system kernel (16). The functions are made available to the core software (20) in a generic format. Additionally, a device drivers-to-driver model interface (30) separates the details of the driver model environment from the core system software (20). Furthermore, a software interface (26) allows application programs (10) (such as program guides, games, and Internet web browsers) and middleware (12) to communicate with the core set-top system software (20). The core software allows the set-top to provide television functions such as service acquisition, system information management, download capability, return path communication, set-top configuration, and conditional access control.

Description

Be used for pushing up the software architecture of establishing terminating machine with the TV of a plurality of operating environment compatibilities
The application's case is advocated in the U.S. Provisional Application No.60/135 of an on May 21, in 999 application, 221 right.
Technical field
The invention provides a kind of software architecture, be used to make the TV top to establish the kernel software of terminal and different operating environment compatibilities.
Background technology
Recently the appearance that terminal is established on numeral top has stimulated user's television network, the development of for example wired/satellite television net.This Terminal Type machine can be supported the programming service of higher level, and various application program and function based on software, electronic program guides for example, and stock or meteorological billboard, the home services of shopping and bank is played etc.And, estimate that this trend will be along with phone, the rise of TV and computer network and indoor computer network and continue the development.
The top box of digital machine (for example user terminal) of wired or satellite television and so on needs operating system (OS) software, and middleware software and device driver are for operation.
Operating system (OS) software provides the operation top to establish required multithreading, real time operating system (OS) support.
Middleware software is the software that connects two application programs that are separated from each other.For example, this class middleware software can be used as the media between an application program and the network, uses management across the interaction between the diverse application program of variety classes computing platform.More generally, middleware software is used as the sticker between the stand-alone utility, and because it connects the both sides of an application program, and send data betwixt, so be called as " pipeline " sometimes (plumbing).
In addition, driver is used for controlling the different hardware equipment of a terminating machine, such as tuner, and demodulator, MPEG-2 decoder (for example, audio frequency, video and data), video encoder, Audio mixer etc.
In a set-top box, provide " kernel software ", it allows the TV functions that establish on this top provides following necessity: service obtains, system information (SI) management, download capabilities (for example for new application program and operating system (OS) software), return path communication (for example establishing) for tabulation purpose poll top, the top establishing is put, and conditional access control (being fail safe).
In the past, each top is established and is designed to only use a specific operation environment.Do not establish environment in the past and propose to handle the multiple operation problem of environment at the top.Generally speaking, application program or be rewritten as software this environment under by the system software of being set up departments in the top perhaps layer goes to various operating environments by an extraction (abstraction).
Therefore, its benefit is: need not to change the core top system software of setting up departments and can establish on a top and select different operating environments.This makes it possible to the design of a kind of top heavily covered and is used for a plurality of operating environments.Can realize simultaneously the replacement of function software environment quickly, new top equipment was gone on the market in the faster time.
Particularly, expectation can have a kind of like this software architecture, and it allows a user, such as a cable television system operator, select the top establish in employed operating environment and device driver, wherein operating environment comprises operating system (OS) core, middleware software and application software.This core is pushed up the system software of setting up departments and should be allowed this device to operate in a shared system environments.This architecture should allow to develop kernel software under arbitrary operating environment in a plurality of different operating environment, realizes this architecture then, and wherein operating environment comprises such as VRTX, WINDOWS CE, and AperiOS, operating environment is established on PowerTV and other tops.
This architecture should be applicable to the terminating machine of the program receiving service by the network of any kind, and wherein said network comprises broadband communication network, digital subscriber ring (DSL) network etc.
The invention provides a kind of software architecture, it has above-mentioned and other advantages.
Summary of the invention
According to the present invention, a kind of software architecture is provided, it can make the kernel software of a top equipment operate under arbitrary operating environment in a plurality of different operating environment.
According to the present invention, a kind of device that is provided for realizing the software architecture of a TV user terminal comprises:
One computer-readable medium has computer program code; And
Be used to carry out described computer program code to realize the device of a layer-stepping software architecture, it comprises:
First hardware layer (34), support terminal hardware;
Second device driver layer (32) comprises at least one device driver;
The 3rd device driver interface layer (30) comprises the interface that is used for described at least one device driver;
The 4th layer (16,18,20,22,24,26) comprise the core system software (20) in order to TV functions to be provided;
Described the 4th layer (16,18,20,22,24,26) also have core abstraction function (18), and it makes described core system software (20) can operate in the different operating environments with described the 3rd device driver interface layer (30) together;
Layer 5 (14,16) is used for middleware software and shifts;
Operating system kernel (16) resides at described the 4th layer and layer 5, and the multithreading, the real time operating system support that provide operating terminal required are provided; And
Layer 6 (12), provide middleware software with at least one application program (10) interface.
The core extract layer can operate core system software with the device driver interface layer under different operating environments.In addition, provide operating system (OS) core at the 4th and five layer.
This architecture further comprises the software interface between core system software and layer 5, and it can operate core system software in different operating environments.
The TV functions of core system software comprises message sink and issue, and system information is handled, the terminating machine configuration, and the terminating machine control messages is handled, and service obtains, conditional access control, download capabilities, one or more in return path communication and the diagnostic data management.
In addition, TV functions can comprise the conditional access service, and this service comprises one or more: object authentication, object mandate, resource authorization, the service of baseline cipher key change, and encryption function.
Simultaneously according to the present invention, a kind of method that is provided for realizing the software architecture of TV user terminal comprises the following step:
By first hardware layer (34), the hardware of support terminal machine;
By second device driver layer (32), provide at least one device driver;
By the 3rd device driver interface layer (30), be provided for the interface of described at least one device driver;
By the 4th layer (16,18,20,22,24,26), provide in order to the core system software (20) of TV functions (20) and core abstraction function (18) to be provided, it makes described core system software (20) operate in different operating environments with the 3rd device driver interface layer (30) together;
By layer 5 (14,16), provide middleware software to shift;
Be provided at the operating system kernel (16) of described the 4th layer and layer 5, the multithreading, the real time operating system support that provide operating terminal required are provided; And
By layer 6 (12), provide middleware software with at least one application program (10) interface.
Description of drawings
This figure explanation is according to TV user terminal architecture of the present invention.
Implement mode of the present invention
This figure has illustrated according to of the present invention in order to realize the software platform or the architecture of set-top box.This platform can use any appropriate operating system to realize, such as being positioned at Oregon, VRTX (the virtual executed in real time) operating system that the Mentor Graphics company of Wilsonville is provided, be positioned at Washington, the WINDOWS CE that Microsoft provided of Redmond is positioned at N.Y., the AperiOS that the Sony company of New YOrk is provided, be positioned at CA, the Power TV that the Power TV company of Cupertino is provided etc.
This architecture is believed to comprise three mains, comprising the rudimentary (function 30 relevant with the device driver function with hardware, 32 and 34), establish the relevant intergrade of software (function 14,16 with the core top, 18,20,22,24 and 26), and senior (function 10,12) relevant with middleware software and application program.
Particularly, the top level of software configuration comprises one or more application programs 10, for example can comprise Digital Television (DTV) omniselector application program (by being positioned at California, the Liberate Technologies of SanCarlos provides), interactive game, the TV characteristic that strengthens, the web browser of internet etc.These application programs need be pushed up the system software 20 of setting up departments with core and be communicated.This communication is by middleware software/application programming interfaces 12, and middleware software transfer layer 14 and software interface 26 are finished.
Following one deck of software configuration comprises middleware software/application programming interfaces API (application programming interfaces) 12.This layer 12 is parts (being that operating system (OS) is proprietary) of operating environment, and provides and establish on the top interface of the application program of carrying out in (hardware 34 is established on for example wired top) 10.The software that layer 12 is provided for application program, using and controller top box resource, and with other application programs and deposit.Layer 12 environment that provides simultaneously in order to executive utility.Layer 12 also provides in order to write the API of application program, and a programming (authoring) environment is provided simultaneously.In addition, the transmission (issue) of this layer processing shared resource, multiple utility program, application program are selected, application program is packed into (launch) and application program stops.Best, it provides a kind of compatible interface to terminal user.
The middleware software transfer layer 14 that for example is used for wired, DSL or other TV service is in order to respectively with TV, it is required and by the specified special functional interface of the supplier/manufacturer of middleware software that figure and communication interface 20,22 and 24 convert the part of middleware software to.The middleware software supplier specifies an interface of testing and verified its software thereon usually.Also as the layer 14 of part operation environment allow with one easily mode the middleware software solution migrated to this top establish.More specifically, when allowing to carry out different intermediate software layers, layer 14 permission core are pushed up the system software 20 of setting up departments and are maintained the original state.
Comprising middleware software transfer layer 14 and the core top system software 20 of setting up departments, the level of figure, audio frequency, subsystem of video 22 and network service storehouse 24 provides operating system (OS) core 16.This OS core 16 for example can comprise MIPS (the per second 1,000,000 instructions) port of 4.0 editions VRTX cores that are exclusively used in Motorola 68000 series microprocessors that the microtechnology department by Mentor Graphics company provides.This operating system kernel 16 provides the operation top to establish the support of required multithreading real time operating system (OS).Together with middleware software transfer layer 14 and operating system (OS) core 16 of middleware software/application programming interfaces API 12 and the part that device driver is operating environment.Particularly, operating system (OS) core 16 provides such as multitask and handles, internal task communication, synchronization, and operating system (OS) software such as storage management.These softwares are used for creation task, set task priority, carry out the communication between task, and the synchronization of system task and application program task operation.
Extracting part 18 according to core of the present invention provides other parts required general kernel heart function.Particularly, core is extracted part 18 and extract these functions from the specific function (specifics) of operating system (OS) core 16.Core is extracted part 18 and is comprised two parts, that is, (i) calls by the used core of part, and the conversion of (ii) special-purpose core.Some central characteristics of supporting is to realize in the mode that is independent of basic core.
According to the present invention, core extraction part 18 pushes up the system software 20 of setting up departments with the details of operating system (OS) core with core to be separated, and the specific function of core system software and the realization of an operating system (OS) core is isolated.The portability of the kernel software 20 between operating environment can be provided in this way.The extraction 18 of operating system (OS) core provides operating system (OS) service of type to core system software 20 with a kind of general fashion.These services for example comprise: information receiving, threading operation, storage management, synchronization, and incident management.
The core top system software 20 of setting up departments comprises support to the television system characteristic.For example, this software can be written as and support DigiCipher  II digital television system characteristic.DigiCipher  II is by its assignee, U.S. Pennsylvania, the exclusive system that general instrument Corp. developed of Horsham.This system comprises the characteristic that is exclusively used in the cable TV environment that carries out following current and adverse current communication.These are included but are not limited to service and are obtained (for example, the film that the choosing that obtains to pay is seen), SIM system information management by set up departments characteristic that system software 20 supported of core top, the top establishing is put and is controlled, the return path of poll comprises authentication and the download capabilities of authorizing, and the nonvolatile memory management.
Core is pushed up the system software 20 of setting up departments and is also comprised conditional access system driver (CABIOS), in order to fail safe and access control to be provided.This part support target authentication, object mandate, resource authorization, Encryption Tool case, and the characteristic of baseline cipher key change.The interface layer that is used for Encryption Tool case (cryptographic tool case) is a public-key encryption standard (PKCS) 11.
More specifically, the core top system software 20 of setting up departments provides the service that allows the top to establish to be present in communication (for example cable TV) network.As mentioned above, the function of this software comprises:
Message sink and issue---this software part on a control channel or by a band in channel reception message, and publish to and be used to the suitable software process explaining and handle.
System information is handled---and this part is explained by being used to specify modulation type, channel map, map of services, Service Description, the system information that the agreement (for example advanced television system committee (ATSC), perhaps digital video broadcasting (DVB) standard) of service part provides.This information allows software to search, rebuild and sends this service to user or application program.
Configuration is handled with control messages---and this part is explained from a for example wired head end controller and is sent to configuration and the control messages that establish on the top.This information is in order to provide a top of operating in cable television system or other available networks to establish.This part is set the characteristic that establish on the top, and the ability of being established operation by operator's remote control top is provided.
Numeral and analog service obtain---and this part is carried out the required function that is necessary of video that " tuning " presented to the televiewer.
Conditional access subsystem---this part is authorized service and application program.Video service is sent to the top with the form of encrypting and establishes.Conditional access (CA) system is with about the authorization message of this service and send to the authorization message of establishing on this top and compare.When approval one service had been authorized to, then this CA system can will should decipher in service.
Download subsystem---this part obtains software objects from wired or other available networks, and it is stored in the top establishes in the memory.These objects can comprise for example software group (software suite) or application program.This download subsystem determines whether it has been authorized to receive object, and if then handle and store each section (segment) of this object.In case this object is stored; Then it is identified, and can carry out this object by for example head end control or by operating system.
Return path subsystem---this part is collected and is bought and diagnostic message, and passes it back head end (or other suitable Systems Operator positions) according to order.At last this information is sent to an accounting system, keeps accounts so that can establish employed service to this top.Return path can be a storage-transfer device, perhaps a request formula human-computer dialogue mechanism.
Diagnostic data ADMINISTRATION SUBSYSTEM---this part collection and management can be established state in order to the diagnosis top, be allowed long-range definite this top to establish the operation of software and intact data.These data can supply operating system (OS) to show to user or installation personnel.It can supply return path subsystem usefulness simultaneously, and is gathered by the computer on this Systems Operator position (for example in a wired head end).
CABIOS (conditional access basic service) provides the conditional access service on the basis of normal service access control, comprising:
The object authentication---this function authenticates a software object, to determine whether this object is the object of being considered.This class authentication is for example finished with the signature that this object sends by coupling.
Object mandate---this function mandate be written into the top establish in and in establish on the top the execution object.Its service condition formula access hardware is determined the licensing status that establish on the top.
Resource authorization---this function mandate uses the top to establish resource by the conditional access hardware.
The service of baseline cipher key change---these functions are supported the cipher key change request of wired modulation demodulation system, and it meets wired loading data service interface regulation (DOCSIS).
Cryptographic function---these functions provide a basic cryptographic tool case, and utility program operating system and application program in establishing for the top are used.Though can use other standards, as above indicated, typical cryptographic tool group is followed PKCS 11 standards.
In best specific embodiment, figure, audio frequency and subsystem of video 22 comprise two dimension (2D), three-dimensional (3D) and operate in the video database of graphical display driver top layer.This class display driver is usually by such as being positioned at Ontario, Canada, and each supplier of ATI Technologies Inc. of Thornhill provides.Subsystem 22 provides a standard A PI, and the middleware software supplier is so far transferable, and can make vision signal and the figure that will view and admire combined.Especially, with analog or digital video and graphics overlay combination, to present to combined picture of user.This subsystem 22 provides the audio frequency that can be present under the various modes simultaneously, such as solid and around audio.This audio subsystem can be supported the record and the playback of audio file simultaneously.
Network service storehouse 24 provides standardized network stack, in order to auxiliary web page browsing and with the communicating by letter of external equipment.This subsystem 24 comprises the multiple standardised networks agreement that sends by many communication paths.This storehouse can comprise for example extending to by being positioned at Oregon, the CNX communication of the VRTX operating system that Mentor Graphlogic Inc. of Wilsonville provides of Mentor/Microtec.
This subsystem 24 resides at the top layer of communications driver (for example second too (Ethernet) and DOCSIS driver), and provide a for example Berkeley socket (Berkeley software Design, Inc.), as with such as transmission control protocol (TCP)/Internet protocol (IP) (for example a DOCSIS modulator-demodulator or second too the TCP/IP interface on net (Ethernet) equipment), User Datagram Protoco (UDP) (UDP), ARP(Address Resolution Protocol), Internet Control Message Protocol (ICMP), DHCP (DHCP) client, (CCP, the interface of the agreement of link control protocol (LCP) and IP(Internet Protocol) control protocol (IPCP) etc. are used in dialing for domain name system (DNS) client and PPP(Point-to-Point Protocol).
Known as affiliated field, for establishing hardware 34 with the top of realizing desirable function, must provide various drivers in order to the manipulator top box.In the drawings, these drivers are described with low order (low level) device driver 32, and according to the present invention, its interface 30 by device driver and driver module pushes up the system software 20 employed driver module interfaces of setting up departments with core.
Device driver is separated the details of driver module environment with the interface 30 of driver module with core system software 20.The interface 30 of device driver and driver module is isolated in order to the proprietary driver module that device driver 32 and operating environment are provided.Low order device driver software 32 is proprietary hardware, and can stride operating environment and use.The interface 30 of device driver and driver module provides operating system (OS) desirable interface by the device driver 32 to proprietary hardware, and this driver is combined with operating system (OS).
Device driver is used to push up each equipment supported of establishing.These drivers comprise a graphdriver, its can for example provide by the ATI hardware access that ATI Technologies Inc. provided (HAP) layer on write.Employed graphic data base can be write on HAP during established on the top.Other typical tops are established device driver and are comprised a communications driver, tuner (combination of for example general equipment DOCSIS tuner and quadrature amplitude modulation (qam) sign indicating number), serial port (using for example IEEE 1394 high performance serial bus), parallel port, second is net (Ethernet) port too, USB (USB) port, light-emitting diode (LED), keypad and/or keyboard driver, one DOCSIS driver, such as the Broadcom DOCSIS driver that is provided by the Broadcom company that is positioned at California, USA Irvine, and smart card.One smart card can be established middle use on the top, be used for such as user's procurement application such as on-line purchases.Each equipment during establish on the top all needs a driver functions to operate.
Obviously, the invention solves and make core top establish the problem that software can be established the operating environment compatibility with multiple top.Use software architecture provided by the present invention, need not perhaps kernel software to be transferred to different operating environments by an extract layer by rewriteeing own coding at each environment.But provide the interface of a unique device driver and driver module and one to extract part in order to overcome portability the very corn of a subject simultaneously, and each interlayer in architecture provides a clearly interface.The present invention can use the OO technology such as C++ or Java programming language to realize, yet the present invention never only limits to this.
The top that is combined as of part described here is established software the basis that can make advanced set-top box realize advanced feature is provided.Each part provides advanced top to establish the required necessary function of terminating machine.Novel architecture of the present invention provide the core top establish software be transferred to substitute operating environment can heavily cover usability and portability, fully understood and the software part of test in advance thereby allow heavily to cover to use.This architecture also allows to be provided at fast and directly the realization that substitutes in the operating environment.
Described though The present invention be directed to various specific implementation, should be understood: under the scope of in not departing from the present patent application claim, being stated, can be carried out various reorganizations and correction.

Claims (28)

1. device that is provided for realizing the software architecture of a TV user terminal comprises:
One computer-readable medium has computer program code; And
Be used to carry out described computer program code to realize the device of a layer-stepping software architecture, it comprises:
First hardware layer (34), support terminal hardware;
Second device driver layer (32) comprises at least one device driver;
The 3rd device driver interface layer (30) comprises the interface that is used for described at least one device driver;
The 4th layer (16,18,20,22,24,26) comprise the core system software (20) in order to TV functions to be provided;
Described the 4th layer (16,18,20,22,24,26) also have core abstraction function (18), and it makes described core system software (20) can operate in the different operating environments with described the 3rd device driver interface layer (30) together;
Layer 5 (14,16) is used for middleware software and shifts;
Operating system kernel (16) resides at described the 4th layer and layer 5, and the multithreading, the real time operating system support that provide operating terminal required are provided; And
Layer 6 (12), provide middleware software with at least one application program (10) interface.
2, device as claimed in claim 1, wherein:
Operating environment comprises described middleware software, and middleware software shifts, and operating system kernel.
3, device as claimed in claim 1, wherein:
Operating environment comprises described middleware software, and middleware software shifts, operating system kernel, and device driver.
4, device as claimed in claim 1, wherein:
Operating environment comprises described middleware software, and middleware software shifts, operating system kernel, device driver, and application program.
5, device as claimed in claim 1, wherein:
The TV user terminal is the TV user terminal of coming received television signal by broadband communication network.
6, device as claimed in claim 1, wherein TV functions comprises one of following at least:
Message sink and issue;
System information is handled;
Terminal configuration;
The terminal control messages is handled;
Service obtains;
Conditional access control;
Download capabilities;
Return path communication; And
The diagnostic data management.
7, device as claimed in claim 1, wherein TV functions comprises the conditional access service, it comprises one of following at least:
The object authentication;
The object mandate;
Resource authorization;
The service of baseline cipher key change; And
Cryptographic function.
8, device as claimed in claim 1, wherein:
The core abstraction function is provided for the core of operating system kernel and calls and the core dedicated convert.
9, device as claimed in claim 1, wherein:
The core abstraction function is used for the core system software and the part operation system core that is exclusively used in operating environment are isolated.
10, device as claimed in claim 1, wherein:
The interface of described at least one device driver is isolated core system software and the equipment component driver that is exclusively used in operating environment.
11, device as claimed in claim 1, wherein:
Operating system kernel provides the software of the terminal that is exclusively used in an operating environment, comprises one of following at least: communication in the multitask, task, information receiving, synchronization, storage management, and incident management.
12, device as claimed in claim 1, wherein:
Architecture further comprises the software interface between a core system software and the layer 5, uses so that described core system software can be operated in different operating environments.
13, device as claimed in claim 12, wherein:
Software interface is used for core system software and part middleware software that is exclusively used in operating environment and middleware software transfer are isolated.
14, device as claimed in claim 12, wherein:
Software interface is used for core system software and the distinctive certain applications program of an operating environment are isolated.
15, a kind of method that is provided for realizing the software architecture of TV user terminal comprises the following step:
By first hardware layer (34), the hardware of support terminal machine;
By second device driver layer (32), provide at least one device driver;
By the 3rd device driver interface layer (30), be provided for the interface of described at least one device driver;
By the 4th layer (16,18,20,22,24,26), provide in order to the core system software (20) of TV functions (20) and core abstraction function (18) to be provided, it makes described core system software (20) operate in different operating environments with the 3rd device driver interface layer (30) together;
By layer 5 (14,16), provide middleware software to shift;
Be provided at the operating system kernel (16) of described the 4th layer and layer 5, the multithreading, the real time operating system support that provide operating terminal required are provided; And
By layer 6 (12), provide middleware software with at least one application program (10) interface.
16, method as claimed in claim 15 further comprises step:
Make described core system software (20) comprise described middleware software, middleware software shifts, and operates under the operating environment of operating system kernel.
17, method as claimed in claim 15 further comprises step:
Make described core system software (20) contain described middleware software, middleware software shifts, operating system kernel, and operate under the operating environment of device driver.
18, method as claimed in claim 15 further comprises step:
Make described core system software (20) comprise described middleware software, middleware software shifts, operating system kernel, and device driver, and operate under the operating environment of application program.
19, method as claimed in claim 15 further comprises step:
By the TV user terminal, come received television signal by broadband communication network.
20, method as claimed in claim 15 further comprises step:
Provide and comprise one of following at least TV functions:
Message sink and issue;
System information is handled;
Terminal configuration;
The terminal control messages is handled;
Service obtains;
Conditional access control;
Download capabilities;
Return path communication; And
The diagnostic data management.
21, method as claimed in claim 15 further comprises step:
The TV functions that comprises the conditional access service is provided, and it comprises one of following at least:
The object authentication;
The object mandate;
Resource authorization;
The service of baseline cipher key change; And
Cryptographic function.
22, method as claimed in claim 15 further comprises step:
By the core abstraction function, the core that is provided for operating system kernel is called and the core dedicated convert.
23, method as claimed in claim 15 further comprises step:
By the core abstraction function, the core system software and the part operation system core that is exclusively used in operating environment are isolated.
24, method as claimed in claim 15, wherein:
By the interface of at least one device driver, core system software and the equipment component driver that is exclusively used in an operating environment are isolated.
25, method as claimed in claim 15 further comprises step:
By operating system kernel, the terminal that is exclusively used in operating environment software is provided, comprise one of following at least: multitask, internal task communication, information receiving, synchronization, storage management, and incident management.
26, method as claimed in claim 15 further comprises:
Software interface between core system software and the layer 5 is provided, uses so that this core system software can be operated in different operating environments.
27, method as claimed in claim 26 further comprises step:
By software interface, core system software and part middleware software that is exclusively used in an operating environment and middleware software transfer are isolated.
28, method as claimed in claim 26 further comprises:
By software interface, core system software and the certain applications program that is exclusively used in an operating environment are isolated.
CNB008092079A 1999-05-21 2000-03-24 Software architcture for television set-top terminal providing compatibility with multiple operating environments Expired - Fee Related CN1144450C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13522199P 1999-05-21 1999-05-21
US60/135,221 1999-05-21

Publications (2)

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CN1357194A (en) 2002-07-03
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