KR0141861B1 - How to control a video cassette recorder on your computer - Google Patents

Abstract

The present invention relates to a method of controlling a video cassette recorder in a computer. To this end, in the method of controlling a video cassette recorder in a computer, a serial having a predetermined format including a synchronization signal, a data type signal, and a data signal transmitted from the computer is provided. A method of receiving and processing data at the video cassette recorder, the method comprising: determining whether there is a signal transmitted from the computer, and if there is a signal transmitted from the computer, determining whether the synchronization signal is obtained by reading a predetermined bit; And determining a data type by reading a data type signal of a predetermined bit when the synchronization signal is confirmed, and performing a corresponding process according to the type of data determined in the step. Provide a control method.

Description

How to control a video cassette recorder on your computer

1 shows a connection between a computer and a video cassette recorder

2 is a flowchart illustrating a video cassette recorder control process in a computer according to a preferred embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

100: computer 110: key input unit

120: microprocessor 130: transceiver

140: TV reception and overlay processing unit 200: video cassette recorder

210: key input unit 220: microcomputer

230: deck portion 240: image processing unit

250: voice processing unit 260: transceiver

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling a video cassette recorder in a computer, and more particularly, to a video cassette recorder control in a computer so as to directly control the operation of a video cassette recorder (VCR) in a personal computer (PC). It is about a method.

In general, the most basic part of multimedia is the convergence of computers and home appliances, which is the digitization of information, that is, the fusion of digitalized information. Computers are excellent at editing and storing processing, while at the same time weak at processing sound and information.

In contrast, home appliances such as televisions, audio equipments, and VCRs are strong in processing audio and video information, but weak in editing and storing information. Taking advantage of these computer and home appliances and complementing each other's shortcomings will be the main form of multimedia.

Meanwhile, the TV reception and overlay board is a PC expansion board that can be inserted into and used in an expansion slot of the PC in response to the multimedia as described above.

The above TV reception and overlay board is a TV tuner board with a built-in TV tuner that allows you to watch VHF / UHF / CATV broadcasts and VCRs on a monitor, and allows you to work on your computer while watching TV / CATV / VCR The overlay board is supported.

In addition, there is a Grab function that allows you to save still images of the desired scene as graphic files in various formats, as well as to change the screen to an arbitrary size or to move it to any position, such as mosaic and multi-screen. Various special effects can be exhibited.

However, when watching the video and audio of the VCR by using the above-described TV reception and overlay board, the operation of the VCR cannot be controlled by the mouse or keyboard of the PC, and the desired operation by the VCR (for example, , Rewinding, fast forward, playback), and the inconvenience of having to perform a separate PC operation again.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a method of controlling a video cassette recorder in a computer that enables the PC to control the operation of the VCR.

A feature of the present invention for achieving the above object is, in a method for controlling a video cassette recorder in a computer, the video cassette has serial data having a predetermined format including a synchronization signal, a data type signal, and a data signal transmitted from the computer. A method for receiving and processing in a recorder, the method comprising: determining whether there is a signal transmitted from the computer; if there is a signal transmitted from the computer, reading a predetermined bit to determine whether the synchronization signal is present; If it is confirmed, the method of controlling a video cassette recorder in a computer comprising reading a predetermined data type signal of a predetermined bit and determining a data type, and performing a corresponding process according to the type of data determined in the determining step. do.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a connection relationship between a computer and a video cassette recorder for explaining a preferred embodiment of the present invention. The figure shows a key input unit 110, a microprocessor 120, a transceiver 130, a TV receiver and overlay processor 140, a key input unit 210 and a microcomputer 220 of the VCR 200. ), A deck 230, an image processor 240, an audio processor 250, and a transceiver 260.

In the figure, the key input unit 110 is provided with a plurality of keys to control the operation of the PC and outputs a key signal resulting from the user's key operation, and a keyboard and a mouse are usually used.

The microprocessor 120 outputs a control signal for controlling PC operation corresponding to the key signal from the key input unit 110 and contracted code data for VCR operation control.

In addition, the transceiver 130 converts the code data from the microprocessor 120 into serial code data and transmits it through a transmission line in a non-equivalent manner, and uses an RS-232C communication interface.

In addition, the transmission line is connected to the TXD (Transmit Data), RXD (Receive Data), GND (Signal Ground) port of the RS-232C port.

Meanwhile, the TV reception and overlay processing unit 140 converts a TV broadcast signal or a video and audio signal input from a VCR, which are selectively received under the control of the microprocessor 120, into a signal that can be displayed and output to a monitor and a speaker. The video information is processed and output, and the input video information is edited and stored, and stored in a file in a storage unit (not shown).

In addition, the key input unit 210 includes a plurality of keys to perform and control the operation of the VCR, and outputs a key signal resulting from a key manipulation of the user.

In addition, the microcomputer 220 outputs a control signal for controlling the operation of the contracted VCR in response to the key signal from the key input unit 210 and the serial code data from the transceiver unit 260.

On the other hand, the deck unit 230 reads and outputs the video and audio signals recorded on the video tape under the control of the microcomputer 220.

The image processor 240 removes and amplifies the image signal from the deck unit 230 and outputs the image signal.

In addition, the voice processing unit 250 removes and amplifies the audio signal from the deck unit 230 and outputs the processed signal.

Meanwhile, the transceiver 260 converts the serial code data transmitted from the transceiver 130 of the PC into parallel code data and outputs the same. The universal asynchronous receiver-transmitter conforming to the RS-232C communication interface standard: UART).

Next, a video cassette recorder control process in a computer according to a preferred embodiment of the present invention will be described in detail with reference to the transmission and reception units 130 and 260 with reference to FIGS.

The format of the data exchanged between the PC and the VCR in the present invention is composed of an ESC code (1 byte) + data type (1 byte) + data (predetermined byte).

First, a process of receiving data transmitted from the VCR will be described with reference to FIG.

It is determined whether the VCR is in a receivable state (step 200), and if it is in a receivable state, a predetermined bit (1 byte) of data transmitted from the PC is read (step 202).

Next, it is determined whether the read predetermined bit is a synchronization signal, that is, an ESC code (step 204).

At this time, when the synchronization signal is confirmed, the PC transmits a predetermined bit (1 byte), i.e., the type of data (step 206), so that the data type is requested data necessary for controlling the VCR in the PC (e.g., display). Data, counter data, remaining tape data, error data, timer data, reservation data, etc.) (step 208).

At this time, if the request data, the type of the request data is determined by storing the type of the request data (step 210).

Then, the request data is prepared for sending to the PC. That is, a transmission ready flag is set (step 212).

Next, in step 208, it is determined whether it is information data (reservation data set in the PC, time data, key data input for VCR operation control, etc.) if it is not request data (step 214). The next data transmitted from the PC is read in units of predetermined bits (1 byte) (step 216), and all received data is stored (steps 218 and 220).

Next, when reception is completed, the reception completion flag is set and ends (step 222).

Next, since data to be transmitted to the PC is prepared in step 212, a process of transmitting to the PC will be described with reference to FIG.

First, in step 220, a reception completion flag is set, and in step 212, it is determined whether a transmission ready flag is set to check whether there is data to be transmitted (step 300).

At this time, if the reception completion flag is set and the transmission ready state is set, and if the transmission ready flag is set and there is data to be transmitted, a delay of a predetermined time (about 5 msec) is delayed (step 302) to prevent an error caused by duplication of transmission and reception. In step 210, the stored request data type is read (step 304).

Next, it is determined whether the request data type is the set request data type (step 306), and if the requested data is set, the corresponding request data to be sent is read out from the VCR and prepared (step 308).

Next, a sync signal (one byte ESC code) is first sent out in accordance with the format of the above-mentioned transmission data (step 310).

Subsequently, an actual code indicating a type of request data, that is, a data type signal (1 byte) is sent (step 312).

Next, the request data prepared in step 308 is sent out to the end in units of predetermined bits (1 byte) (steps 314 and 316), and the process ends.

As described above, according to the present invention, when watching the video and audio of the VCR in the PC, there is an effect that can conveniently control the operation of the VCR directly from the PC.

Claims (4)

A method of controlling a video cassette recorder in a computer, wherein the video cassette recorder receives and processes serial data having a predetermined format including a synchronization signal, a data type signal, and a data signal transmitted from the computer. Determining whether there is a received signal; reading a predetermined bit if there is a signal transmitted from the computer; determining whether the signal is the synchronization signal; and reading a data type signal of a predetermined bit when the synchronization signal is confirmed. And determining a step of performing a corresponding process according to the type of data determined in the step. The method of claim 1, wherein the determining of the data type comprises: determining whether the computer is request data for requesting data required for controlling a video cassette recorder, reservation data set from the computer, time data, A method of controlling a video cassette recorder in a computer, comprising determining whether the information data includes input key data for controlling the operation of the video cassette recorder. The method of claim 1, wherein the performing of the processing according to the data type comprises: determining the type of request data in the case of the request data and transmitting the determined request data to the computer; and in the case of the information data, the data signal transmitted from the computer. And storing the received data by a predetermined bit unit. 4. The method of claim 3, wherein sending the request data to the computer comprises: determining whether the video cassette recorder is in a reception completion state; Delaying a predetermined time when the reception is completed; Preparing request data in accordance with the format of the serial data; Transmitting the synchronization signal; Transmitting the predetermined data type signal corresponding to the type of the requested data; And transmitting the request data.