KR0113525Y1 - Apparatus for checking remaining amount of recorded programs using caption data - Google Patents

Abstract

The present invention relates to a recording program remaining amount checking device using caption data, and the conventional tape remaining amount checking uses only the difference between the supply reel pulse and the take-up reel pulse to calculate only the remaining amount to the end of the tape. The present invention provides a video signal recording and reproducing apparatus, comprising: a data detector for extracting a data component loaded in a vertical retrace section from an inputted playback video signal, and a program remaining amount for detecting and decoding program residual information information from data detected by the data detection unit; And a display unit for displaying the program remaining amount information decrypted by the program remaining amount information decoding unit.

Description

Residual Checking Device for Recording Program Using Caption Data

1 is a configuration diagram for the conventional tape remaining check

2A and 2B are waveform diagrams of supply reel pulses and take-up reel pulses according to FIG.

3 is a view for explaining the principle of the present invention

4 is a diagram showing a program remaining amount checking according to the tape running amount according to the present invention

5 is a block diagram of the program remaining amount checking device of the recording tape using the caption data according to the present invention

6 is an operation flowchart of the present invention

＊ Explanation of symbols on main parts of drawing

10: data slicer 20: caption decoder

30: caption micom 40: main micom

50: OSD unit 60: Title IC

70: synchronization separator

The present invention relates to a recording program remaining amount checking device using caption data, and more specifically, to recording a remaining amount of recording program using caption data enabling accurate calculation of the remaining amount up to the end of recording using a certain code of caption data. Relates to a device.

In general, the remaining amount of tape checking is performed by supplying the supply reel and take up reel pulses as shown in FIG. 2 (a) (b) to the light emitting diode (LED1). Photocouplers 1 and 2 composed of (LED2) and light-receiving transistors (TR1) and (TR2) were generated by a microcomputer (not shown) to calculate the difference between the two pulses to determine the remaining amount of tape.

This tape remaining checking function checked the time to the end of the tape by comparing the take-up reel pulse with the supply reel pulse.

However, if the user watches a general rental tape, the actual part to be known is the time until the end of the recorded part. However, only the remaining amount of the entire tape can be checked by the conventional tape remaining checking method. It was impossible to determine exactly how much was left.

The present invention solves this problem, and an object of the present invention is to use a constant code of caption data as a pilot signal, and to use the data after the pilot signal as the data for calculating the remaining tape amount of the tape to the end of recording. The present invention provides an apparatus for checking the remaining amount of recorded programs using caption data.

In order to achieve the above object, a feature of the present invention is to extract a data component contained in a vertical retrace section from an inputted video signal in a video signal recording and reproducing apparatus. And a recording program remaining amount checking device using caption data comprising a program remaining amount information decoding unit for detecting and decoding data, and a display unit for displaying the remaining program information decoded by the program remaining amount information decoding unit.

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

First, the principle of the present invention will be described.

As shown in FIG. 3, the caption data coding for checking the remaining amount of the recorded video is composed of two parts. In general, since the caption data has 8 bits as its basic configuration format, 28 = 256 pieces of data can be represented.

In the video caption subtitles, not all 256 data are needed, so one format is used as a pilot signal that the next 8 bits are data for the remaining tape.

For example, if the pilot code is 1111 1111 in binary, when the microcomputer reads this code, it will recognize that the next 8-bit data is the remaining tape data, not the caption data.

The number displayed as 8 bits is 0-255, so up to 256 remaining data can be recorded on one tape. The time interval for recording this data is set according to the tape playback speed and type.

For example, if the following data is read

1111 1111 0100100

+ -------- + + ----- +

A B

The first part of A tells you that the last 8 bits are the remaining data, and the second part of B represents 36 in decimal, indicating that there is 36 minutes left from the tape location where this code was recorded to the end of the recording.

4 shows the relationship between the caption data recording portion and the tape travel amount. For example, FF (remaining pilot code) 01 (hexadecimal number) is used at the end of the video signal recording portion of the tape where the travel amount is 1 minute. 1 minute after the caption data is read, the microcomputer is informed that the end of the video signal recording is reached.

Of course, in order to read such data, the pilot code and the remaining amount of data must be input at the correct time interval when caption data is recorded on the tape.

5 is a block diagram of a recording tape remaining amount checking device using caption data of the present invention based on the above principle. The data slicer 10 extracts various data components from an input video signal, and the data slicer. A caption decoder 20 for recording caption data from (10), a caption micom 30 for detecting a pilot signal for detecting the remaining tape amount from the output of the caption decoder 20, and the caption micom 30 OSD unit for displaying the remaining amount of tape calculated by the main micom 40 under the control of the main micom 40, and the main micom 40 to calculate the remaining amount of the recording portion using the remaining pilot signal and caption data from the 50, the title IC 60 in which the titles of various recording programs are recorded, and the various synchronization signals Hsync (Vsync) and (Csync) are separated from the input video signal. It is composed of a synchronization separator 70 provided to the caption decoder 20.

In the present invention configured as described above, the data slicer 10 extracts various data components from an input video signal, and the extracted data is input to the caption decoder 20 to decode caption data.

The data decoded from the caption data is input to the caption micom 30 through the data bus to detect a pilot signal for detecting the remaining amount of program on the tape, and is input to the main microcomputer 40 together with the caption data.

Accordingly, the main microcomputer 40 calculates the remaining amount using the pilot signal and caption data, and displays the remaining amount of the program calculated on the OSD screen through the OSD unit 50 if desired by the user.

6 is a flowchart for carrying out the present invention. The main microcomputer 40 reads caption data from the caption microcomputer 30 to determine whether there is a pilot code (S1) and (S2).

When the pilot code is detected in step S2, the 8-bit data following the pilot code is recognized as the remaining data, the 8-bit data is read, the remaining tape is calculated as time, and the remaining time is displayed through the OSD. S6).

If it is determined in step S2 that there is no pilot code, only the caption data is displayed (S7) and the process returns to step S1.

As described above, the present invention uses the constant code of the caption data as a pilot signal, so that the remaining amount of the recorded portion can be accurately known by using 8-bit data behind the pilot signal to calculate the remaining amount of the program recording portion of the recording tape. .

Claims (1)

An apparatus for checking a remaining amount of a recorded program using caption data coded divided into pilot signals and remaining time data; A data detector which detects the pilot program and the remaining time data from the caption data carried in the vertical retrace section of the playback signal of the recorded program; A program remaining amount information decoding unit for discriminating the detected remaining time data according to the detected pilot signal as remaining time data of a recorded program and calculating a remaining time of the program; And a display unit for displaying the remaining time calculated by the program remaining amount information decoding unit as a caption subtitle.