KR19980058705A - On-Screen Display (OSD) Device and Method Using Memory Device - Google Patents

Abstract

The present invention provides a method for storing OSD data including various languages by storing memory devices separate from the microcomputer, and reading the stored OSD data to the OSD unit and outputting the OSD data to the OSD unit. Even OSD devices for users of different languages can be developed cheaply and quickly by simply replacing memory devices that store data containing the languages.

Description

On-Screen Display (OSD) Device and Method Using Memory Device

The present invention has a memory device that stores data for On Screen Display (hereinafter referred to as “OSD”), including various languages separately from the microcomputer, and includes a corresponding language when the language used is different. The present invention relates to an OSD device and method using a memory device that does not require the development of a separate microcomputer by replacing a memory device that stores data.

In general, the conventional OSD device is composed of the OSD unit 10 and the microcomputer 11, as shown in Figure 1, the operation of the conventional OSD device having such a component is as follows.

The microcomputer 11 stores the OSD data corresponding to characters, symbols, or numbers as well as serves to operate each component according to a command given by the user. When the microcomputer 11 is applied to the microcomputer 11, the microcomputer 11 determines what external command is, and outputs OSD data and a control signal to the OSD unit 10 according to the determination.

The control signal includes a clock signal and a strobe signal. The strobe signal enables the OSD unit 10 to operate in a high or low potential state, and a clock signal is used to generate the strobe signal. When the OSD unit 10 is in an operable state by a signal, a time point for reading OSD data applied by the microcomputer 11 is determined.

The OSD unit 10 detects a synchronization signal from an input external video signal, mixes the OSD data applied from the microcomputer 11 with an external video signal in accordance with the detected vertical synchronization and horizontal synchronization, and displays the externally connected signal. Output to the device.

The OSD unit 10 uses a large number of integrated circuits (ICs) incorporating circuits that perform necessary operations. To this end, an oscillation frequency having a different value depending on a video signal and a voice signal processing method such as PAL, NTSC, SECAM, etc. Is needed. In a device such as a VCR (Video Cassette Tape Recorder), a synchronization signal (Sync) may be input from the OSD unit 10 to the microcomputer unit 11 to determine a method of an external video signal input in a record mode. do.

In the conventional conventional OSD device having the above-described configuration and operation, data for implementing the OSD is stored in the microcomputer. Thus, in order to apply to regions using various languages such as the PAL method, OSDs for different display languages are different. There was a problem of developing a separate microcomputer for implementation. In addition, there were also non-economics such as delays in product development and increased expenses.

Accordingly, an object of the present invention is to provide an OSD device for storing OSD data including various languages and a method of implementing the same using a separate memory device instead of a microcomputer, so that the time and cost required for product development is different. It is an object of the present invention to provide an OSD device and method using a memory device capable of reducing costs.

1 is a block diagram showing an example of a conventional on-screen display (OSD) device,

2 is a block diagram showing an embodiment of an on-screen display (OSD) device using a memory device to which the present invention is applied;

3 is a flowchart illustrating an embodiment of an on-screen display (OSD) method using a memory device to which the present invention is applied.

Explanation of symbols used in the main part of the drawing

20: OSD unit

21: microcomputer

22: memory element

Features of the OSD device and method using a memory device according to the present invention for achieving the above object is using a separate memory device for storing data such as language, characters, etc. applied to the OSD unit instead of a microcomputer and using this memory device How to implement the OSD.

Hereinafter, a preferred embodiment of an OSD device and method using a memory device according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, an OSD device using a memory device includes an OSD unit 20, a microcomputer 21, and a separate memory device 22. Here, since the configuration of the OSD unit 20 and the microcomputer 21 is the same as the conventional OSD device, only the components and operations unique to the present invention will be described in detail.

First, when an external command related to the OSD is applied to the microcomputer 21 by the user, the microcomputer 21 determines an external command such as a language used or a function of the OSD to be implemented, and according to the determination, the microcomputer 21 Access the memory device 22 using the address of the user's address as an index and read the corresponding data.

The memory device 22 stores data for implementing an OSD. In the data storage method, characters, symbols, or numbers are separated for each language and stored at a specific address. Screens, reservation recording setting screens, etc., are classified and stored in a page unit at another address. The memory device 22 uses a non-volatile random access memory (NV-RAM) or a read only memory (ROM) that does not cause leakage of stored data even when the power supply is cut off.

Thereafter, the microcomputer 21 outputs the OSD data read from the memory device 22, the clock signal and the strobe signal for the OSD implementation to the OSD unit 20, and the OSD unit 20 receives the external image signal. A synchronization signal is detected, and OSD data applied from the microcomputer 21 is mixed with an external video signal in accordance with the detected vertical synchronization and horizontal synchronization, and output to an externally connected display device.

FIG. 3 is a flow chart illustrating a control method of a microcomputer for implementing the embodiment of FIG. 2 using the memory device to which the present invention is applied. The configuration and operation of the process are as follows.

It is determined whether the OSD related signal for OSD ON or status change is input to the microcomputer 21. If there is no input of the related signal, the process of implementing the OSD method using the memory element is finished. Identify the language for OSD implementation of symbols or numbers, eg English or German.

Thereafter, a page indicating a type of OSD to be implemented, such as a menu screen, a time display screen, a reservation recording setting screen, and the like, is checked in connection with the input signal, and accesses the memory device 22 as determined in this process. The necessary OSD data is read by the microcomputer 21 for each language and page, and transmitted to the OSD unit 20.

After the above process, the on / off state of the OSD is determined, and if it is off, the process of implementing the OSD method using the memory device is finished, and if it is on, the process returns to the first process of determining the OSD related input signal.

As described above, according to the OSD apparatus and method using the memory device according to the present invention, an OSD is implemented using the memory device having a separate memory device for storing data such as language and characters applied to the OSD unit instead of the microcomputer. Even if the language is different, it is not necessary to develop a separate microcomputer by replacing only the memory device that stores data about the corresponding language even if the language is different. It has the effect of reducing expenses.

Claims (3)

Memory device that stores data for OSD implementation by language and page, A microcomputer for determining an OSD-related input signal and thereby reading the corresponding data of the memory device; And an OSD unit receiving OSD data from the microcomputer to synchronize the video signal supplied from the outside, and mixing the video signal with the video signal and outputting the mixed video signal to the display device. The method of claim 1, wherein the memory device, On-Screen Display (OSD) device using a memory device, characterized in that the non-volatile memory device. Determining whether the OSD-related signal is input and ending the control process if there is no input of the related signal; If there is an input of an OSD-related signal in the above process, checking a language for OSD implementation; Confirmation of the page indicating the type of OSD to implement, Reading the language and page-by-page OSD data from the memory device into the micro-computer as described above; Transmitting the read OSD data to an OSD unit; On-screen display (OSD) method using a memory device characterized in that the control to go back to the first process of determining the on-off state of the OSD after the above process to end the control process or again to determine the OSD-related input signal .