KR100544151B1 - Software management system for imbedded operating system of digital television - Google Patents

Abstract

An embedded OS software integrated system of digital television is disclosed. An apparatus according to the present invention includes: a first layer having a device driver on top of hardware; A second layer installed on top of the first layer to form a hardware abstraction layer serving as an interface for operating each hardware; A fourth layer having an MCU INF manager and middleware for acting as an interface with a hardware virtual layer step; And the embedded OS system of digital television, which is composed of a fifth layer for loading a menu structure and an application program as a final step of the platform, subdividing device drivers and acting as an interface with applications and middleware. A third layer composed of an OS abstraction layer is performed. Accordingly, the present invention builds an OS Abstraction Layer (OSAL) between the OS layer and the application layer of a digital television, thereby modifying only the OS virtual layer during system development, thereby enabling development without modification of the overall software stack. Get

Digital, television, OS, layer, application, middleware, integration, hardware

Description

SOFTWARE MANAGEMENT SYSTEM FOR IMBEDDED OPERATING SYSTEM OF DIGITAL TELEVISION

1 is a block diagram showing a software stack constructed on a platform of a digital television according to the present invention.

<Description of Symbols for Main Drawings>

101: first layer (103) 103: second layer (Layer)

105: fourth layer 107: fifth layer

109: third layer

The present invention relates to middleware as a distributed element-based software development method, and more particularly, to an embedded OS software integration system for digital television that provides a distributed software development framework in an embedded system.

In general, distributed systems take the practical structure of a multi-tiered client / server architecture. In other words, it is not a separation between the business layer and the data access layer, but a transparent system that exposes all the functionality of an application so that any service provided by a component in the system or a component on another system can be used. It is middleware that supports this distributed system. Middleware is a general purpose software developed to overcome the differences between different models with the goal of making distributed computing easier.

In general, software development has problems with the lack of an operating system when developing network applications, including networking and operation problems between different models. In other words, to execute processing between two or more systems, a communication function is required that delivers the necessary content for heterogeneous networking or protocols between different operating systems or server software. At this time, the function of middleware is to efficiently connect different hardware, DBMS (Data Base Management System), protocol, application, data format, etc. in the middle.

The middleware is a first layer (Layer) having a device driver (Device Driver) on the top of the hardware, and a hardware virtual layer (Hardware Abstraction Layer) installed as the top of the first layer to serve as an interface for operating each hardware ) And a fourth layer having an MCU manager (MCU INF Manager) and middleware for interfacing with the hardware virtual layer. In addition, as a final step, an application layer for mounting a menu structure and other application programs is separately provided.
The fourth layer includes a tuning task including a graphic task, a video task, an audio task, a closed caption, a rating, and a SI / PSIP. It consists of middleware that includes a task). The middleware consists of an Event Manager, a User Interface (USIF), an EEPROM Manager, and a Key Dispatch Engine. The application of the fifth layer includes a menu, an EPG, a download application, and other registered applications.
However, the above-described middleware has a problem that mutual compatibility is not achieved when the platforms are different in software development of existing digital television. That is, when the addition or change of software is not compatible between the application layer and the OS (OS: first layer to fourth layer), the inconvenience of having to modify the entire software stack is caused.

The present invention was created to solve such a problem, and the purpose of the present invention is a naming service and an interface definition language (IDL) compiler based on a remote procedure call (RPC) method on an embedded system. By combining the digital TV to ensure the real-time performance of digital television, independence of platform and network protocols, and to provide an integrated framework of the embedded system of digital television that facilitates the reconstruction of system and software components. To provide a TV embedded embedded OS software integration system.

In order to achieve the above object, an embedded OS software integration system of a digital television according to an aspect of the present invention comprises: a first layer having a device driver on top of hardware; A second layer installed on top of the first layer and forming a hardware abstraction layer serving as an interface for operating each hardware; A fourth layer having an MC INF manager and middleware for acting as an interface with the hardware virtual layer step; And an embedded OS system of a digital television composed of a fifth layer for loading a menu structure and an application program as a final stage of a platform, wherein the device driver is subdivided and an interface with an application and middleware. A third layer including an OS abstraction layer, which plays a role, is included.
According to a preferred embodiment of the present invention, the third layer may be any one of protocols such as Remote Method Invocation (RMI), Common Object Request Broker Architecture (CORBA), Distributed Component Object Model (DCOM), and the like. It is characterized by one.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 is a block diagram showing a platform of a digital television according to the present invention. As shown, a first layer having a device driver on top of hardware; A second layer installed on top of the first layer and forming a hardware abstraction layer serving as an interface for operating each hardware; A fourth layer having an MC INF manager and middleware for acting as an interface with the hardware virtual layer step; And an embedded OS system of a digital television composed of a fifth layer for loading a menu structure and an application program as a final stage of a platform, wherein the device driver is subdivided and an interface with an application and middleware. A third layer including an OS abstraction layer, which plays a role, is included.

The fourth layer 105 is tuned to include a graphic task, a video task, an audio task, a closed caption, a rating, and a SI / PSIP. It consists of middleware that contains a task (Tuning Task). The middleware is composed of an Event Manager, a User Interface (USIF), an EEPROM Manager, and a Key Dispatch Engine. Applications of the fifth layer 107 include a menu, an EPG, a download application, and other registered applications.

The third layer 109 can be used for this communication with any of a variety of interaction protocols. For example, the protocol used may be Java® Remote Method Invocation (RMI), Common Object Request Broker Architecture (CORBA), Distributed Component Object Model (DCOM), or the like. The service object that the customer receives from the cruise service may be called back with code deployed at the service provider, for example by calling the RMI method, or run locally to provide the requested service, or a combination of these approaches. It is available.

The Remote Method Invocation (RMI) provides a simple and straightforward model for distributed programming using Java objects. A system based on RMI can be highly ported and executed in any Java virtual machine, and the CORBA (Common Object Request Broker Architecture) can integrate distributed application programs based on object-oriented technology. CORBA provides a standard mechanism for defining the interface of components, and can provide tools to facilitate the implementation of these interfaces using a developer's specific language.

As described above, the embedded OS software integrated system of the digital television according to the present invention builds an OS abstraction layer (OSAL) between the OS layer and the application layer of the digital television to modify only the OS virtual layer during system development. You can develop without modifying the entire software stack. In addition, since the development process only through the modification of the OS virtual layer (OSAL) is achieved, the development period is shortened.

What has been described above is only one embodiment for implementing the embedded OS software integrated system of digital television according to the present invention, and the present invention is not limited to the above-described embodiment, as claimed in the following claims. Without departing from the gist of the present invention, anyone of ordinary skill in the art will have the technical spirit of the present invention to the extent that various modifications can be made.

Claims (5)

A first layer having a device driver on top of hardware; A second layer installed on top of the first layer and forming a hardware abstraction layer serving as an interface for operating each hardware; A fourth layer having an MC INF manager and middleware for acting as an interface with the hardware virtual layer step; And an embedded OS system of a digital television composed of a fifth layer for loading a menu structure and an application program as a final stage of the platform, And a third layer comprising an OS abstraction layer that divides the device driver and serves as an interface with an application and middleware. delete delete delete The method of claim 1, wherein the third layer is any one of protocols such as Remote Method Invocation (RMI), Common Object Request Broker Architecture (CORBA), Distributed Component Object Model (DCOM), and the like. Features an embedded OS software integration system for digital television.

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