KR19990050593A - Recording Control Method in Multi Broadcasting Tele Video - Google Patents

Abstract

According to the present invention, when performing a recording operation for an RF broadcast signal in a televideo capable of receiving / processing a multicasting method, the video tape T is divided and classified according to the broadcasting method on the video tape T to record a broadcast signal. The present invention relates to a recording control method in a multi-broadcast televideo system, which reproduces and outputs broadcast signals of NTSC, PAL, and SECAM methods, and plays / plays a predetermined video / audio signal on a video tape (T). In a multi-cast televideo capable of recording; Detecting a broadcast method of a recording channel when the recording mode is set; If the result of the detection is that the broadcasting method of the recording channel is the PAL / SECAM method, it is determined whether the broadcasting method of the previous recording channel was the PAL / SECAM method. As a result of the determination, if the broadcasting method of the previous recording channel was the PAL / SECAM method, the video tape T A second step of recording a video signal of a PAL / SECAM method on the computer; In the first step, if the broadcast method of the recording channel is the NTSC method, it is determined whether the broadcast method of the previous recording channel was the NTSC method. As a result of the determination, if the broadcast method of the previous recording channel was the NTSC method, the video tape T is determined. A third step of recording an NTSC video signal; And a fourth step of recording a predetermined VIS signal at the video signal recording end point of the video tape T when the recording mode is terminated.

Description

Recording Control Method in Multi Broadcasting Tele Video

The present invention relates to a recording control method in a multi-broadcast type televideo, and more particularly, to dividing a video tape (T) when performing a recording operation on an RF broadcast signal in a televideo capable of receiving / processing a multi-broadcast method. The present invention relates to a recording control method in a multi-broadcasting televideo, which is capable of recording broadcast signals classified by the broadcasting method on the videotape T.

As is well known, the terrestrial broadcasting TV transmission system is classified into SYSTEM M, B / G, D / K, I, L, etc. according to the synchronization signal characteristics by CCIR REPORT, and also NTSC system (NATION TELEVISION) according to the color system. SYSTEM COMMITTEE), PAL (PHASE ALTERNATION BY LINE), SECAM (SEQUENTIEL COULEUR A MEMOIRE)

Therefore, countries around the world are doing TV broadcasting by combining their TV transmission and TV color system. For example, the United States, Japan, Korea, etc. adopt NTSC-M method, and Germany, Spain, Italy, Sweden, etc. PAL-B / G in Western Europe, PAL-D / K in China and Romania, PAL-I in the United Kingdom, Ireland and South Africa, SECAM-L in France and Luxembourg. In Eastern Europe, SECAM-D / K is adopted.

As described above, since the broadcasting methods employed in each country are different, it is not possible to be compatible with televisions and VCRs between countries with different broadcasting methods. In other words, televisions and VCRs produced in countries that adopt the NTSC system are designed to be able to process video / audio signals transmitted by the NTSC system, so they are transmitted using the PAL or SECAM method except the NTSC system. The playback process for the video / audio signal being played was not possible.

The multi-television developed in view of the above points is not limited to one broadcasting method, but the internal signal processing method is switched on the basis of the TV broadcasting method that is inputted. Video and audio signals can be reproduced and output.

In addition, the multi-broadcasting tele-video developed by adding a video cassette recorder function to the multi-television has been developed.

In the above-mentioned multi-broadcast televideo, broadcast signals of the selected recording channel are sequentially recorded on the videotape T when the recording mode is set. Therefore, the videotape T has the NTSC video signal and the PAL / SECAM videotape. Since the video signals are recorded in a mixed form, the NTSC video signal processing means and the PAL / SECAM video signal processing means are reproduced according to the broadcasting method of the video signals recorded on the video tape T when the video tape T is reproduced. As the switching operation is performed several times, the scanning bow and the vertical / horizontal deflection signal for the video signal are changed several times.

As a result, the signal processed inside the multi-broadcast televideo may become unstable, which is a major cause of deterioration of image quality when playing videotape.

Accordingly, the present invention has been made in view of the above circumstances, and when the recording operation for the RF broadcast signal is performed in a tele video capable of receiving / processing a multi-casting method, the video tape T is divided into the video tape T. It is an object of the present invention to provide a recording control method in a multi-broadcast televideo, which can record broadcast signals classified by broadcasting methods.

According to an embodiment of the present invention for realizing the above object, the NTSC, PAL and SECAM broadcast signals are reproduced and output, and a predetermined video / audio signal can be reproduced / recorded on the video tape T. In multi-cast televideo enabled; Detecting a broadcast method of a recording channel when the recording mode is set; If the result of the detection is that the broadcasting method of the recording channel is the PAL / SECAM method, it is determined whether the broadcasting method of the previous recording channel was the PAL / SECAM method. As a result of the determination, if the broadcasting method of the previous recording channel was the PAL / SECAM method, the video tape T A second step of recording a video signal of a PAL / SECAM method on the computer; In the first step, if the broadcast method of the recording channel is the NTSC method, it is determined whether the broadcast method of the previous recording channel was the NTSC method. As a result of the determination, if the broadcast method of the previous recording channel was the NTSC method, the video tape T is determined. A third step of recording an NTSC video signal; When the recording mode is terminated, there is provided a recording control method in a multi-broadcast televideo, comprising a fourth step of recording a predetermined VIS signal at a video signal recording end point of the video tape T.

According to the present invention composed of the above steps, when the recording mode is set in the multi-television, up to ½ of the total playable time of the video tape T, a PAL / SECAM type video signal is recorded and ½ point of the total playable time. Since the NTSC video signal is recorded, the broadcasting system is switched once from the PAL / SECAM system to the NTSC system during playback of the video tape T, thereby stabilizing the signal processed in the corresponding multi-television.

1 is a block diagram illustrating a main block configuration of a video signal processing system of a multi-broadcast televideo to which a recording control method is applied according to an embodiment of the present invention;

2 is a flowchart illustrating an operation of a recording control method in a multi-broadcast televideo according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: control signal input unit, 12: control unit,

14: tuner, 16: video IF module,

18: A / V switching unit, 20, 50: NTSC video signal processing unit,

22, 52: PAL / SECAM video signal processor, 24: video amplifier,

26: CRT drive unit, 28, 54: synchronous signal detection unit,

30,56: injection player detection unit, 34: data storage unit,

46: tape driving mechanism, 48: signal recording / reading,

58: vertical / horizontal deflection circuit.

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

1 is a diagram illustrating a main blur configuration according to an image processing system of a multi-broadcasting televideo to which a recording control method is applied according to an embodiment of the present invention. In FIG. A control signal input unit for inputting the setting state of the various functions provided, 12 is a control unit for performing the operation control for the entire apparatus based on the control signal input from the control signal input unit 10, assuming that the present invention The control unit 12 detects the broadcasting method of the tuned recording channel when the recording mode is set, and controls the broadcasting signal of the recording channel to be classified and stored according to the broadcasting method on the video tape T after the broadcasting signal of the recording channel is properly processed. do.

Further, reference numeral 14 is a tuner for tuning a specific channel among a plurality of channels received through the antenna based on the tuning voltage VT applied from the controller 12, and 16 is a channel tuned in the tuner 14. Is an image IF module that detects only an image signal after receiving IF broadcast signal from a TV broadcast signal, and 18 is an NTSC image signal processor to which an image signal from the image IF module 16 will be described later under the control of the controller 12. NTSC video signal processing unit 20 to be applied to the PSC / SECAM video signal processing unit 22 or to the video signal output from the NTSC video signal processing unit 50 to be described later when setting the playback mode. A / V switching unit for setting a path so that the video signal output from the PAL / SECAM video signal processing unit 52 to be described later or to be described later is applied to the PAL / SECAM video signal processing unit 22 to be described later.

Reference numeral 20 denotes an NTSC image signal processing unit for reproducing the video signal applied through the A / V switching unit 18 so as to conform to the NTSC method and outputting an RGB signal according to the reference. 22 is the A / V switching unit. A PAL / SECAM video signal processing unit for reproducing and processing the video signal applied to the PAL / SECAM method according to 18, and outputting an RGB signal according to the method, and 24 denotes the NTSC video signal processing unit 20 and the PAL / SECAM. An image amplifier for amplifying the video signal output from the SECAM image signal processor 22 to be reproduced and output through the CRT, 26 is a RGB electron beam for the video signal output from the image amplifier 24 is radiated to the CRT side It is a CRT drive unit that drives the CRT.

In FIG. 1, reference numeral 28 denotes a synchronization signal detection unit for detecting a horizontal synchronization signal HS and a vertical synchronization signal VS from the image signal output from the image IF module 16, and 30 denotes the synchronization signal detection unit ( 28 is a scan player detecting unit for detecting a scan player based on the horizontal sync signal HS and the vertical sync signal VS detected in the present invention. In the present invention, the scan player detecting unit 30 is provided from the sync signal detecting unit 28. The scanning player is detected by counting the applied horizontal synchronizing signal HS and then the detected scanning player is applied to the control unit 12 and reset by the vertical synchronizing signal VS from the synchronization signal detecting unit 28. do.

Reference numeral 34 denotes a data storage unit which stores data on the broadcasting method of the finally recorded recording channel.

In addition, reference numeral 46 illustrated in FIG. 1 includes a reel motor for driving the video tape T, a winding reel / supply reel, and the like, and the video tape T is determined under the control of the controller 12. A tape driving mechanism for controlling the driving state of the video tape T so as to travel at a speed, and 48 is composed of an audio head, a plurality of video heads, an audio erase head / full erase head, and the like. Is a signal recording / reading unit for reading audio / video signals from the video tape T driven by the < RTI ID = 0.0 >), < / RTI > or recording the video and audio signals on the video tape T, and 49 is under the control of the controller 12. A switching unit for switching the processing path of the video signal read by the signal recording / reading unit 48.

Reference numeral 50 denotes an NTSC image signal processor for reproducing the video signal applied via the switching unit 49 to the A / V switching unit 18 to conform to the NTSC method, and 52 denotes the switching. A PAL / SECAM video signal processing unit for reproducing the video signal applied via the unit 49 so as to be suitable for the PAL / SECAM method and outputting it to the A / V switching unit 18.

Reference numeral 54 denotes a synchronization signal detection unit for detecting a horizontal synchronization signal HS and a vertical synchronization signal VS from an image signal output from the signal recording / reading unit 48, and reference numeral 56 denotes a synchronization signal detection unit 28. An injection player detection unit detects an injection player based on the detected horizontal synchronization signal HS and the vertical synchronization signal VS.

Next, the recording control method in the multi-broadcast televideo according to an embodiment of the present invention will be described in detail with reference to the flowchart shown in FIG. 2.

First, when a recording mode is set by the control signal input unit 10 and a recording channel is selected according to the recording mode execution (step 80), the control unit 12 determines the preset voltage VT for the recording channel. Applied to the tuner 14, and the tuner 14 tunes a specific channel among a plurality of channels received through the antenna based on the corresponding tuning voltage VT, and then connects the broadcast signal according to the image IF module to the rear stage. (16).

Accordingly, the video IF module 16 IF-amplifies the corresponding broadcast signal, detects only the video signal from the IF-amplified broadcast signal, and applies it to the A / V switching unit 18 and at the same time the synchronization signal detector 28. The sync signal detector 28 detects a horizontal / vertical sync signal from the video signal and applies it to the scan player detector 30, and the scan player detector 30 transmits the sync signal detector 28. The scanning player is counted based on the horizontal synchronizing signal and the vertical synchronizing signal applied from the controller, and the counting result is applied to the controller 12.

Subsequently, the control unit 12 detects the broadcasting method of the recording channel based on the counting result value (step 82), and then determines whether the broadcasting method of the recording channel is the PAL / SECAM method (step 84). As a result, if the broadcasting method of the recording channel is the PAL / SECAM method (YES in step 84), it is determined whether the broadcasting method of the last recording channel was the PAL / SECAM method based on the data stored in the data storage unit 34 (step 86 ).

As a result of the determination, if the broadcasting method of the last recording channel was PAL / SECAM (YES in step 86), the control unit 18 controls the A / V switching unit 18 to broadcast TV from the video IF module 16. The signal is applied to the PAL / SECAM video signal processing unit 52 and the switching unit 49 is controlled to process the recordable signal in the PAL / SECAM video signal processing unit 52 based on the PAL / SECAM method. The video signal thus received is applied to the signal recording / reading unit 48 to be recorded on the video tape T by the signal recording / reading unit 48 (step 90). At this time, the video signal of the PAL / SECAM method is recorded from the initial point of the video tape T.

Subsequently, the control unit 12 determines whether the recording mode is terminated by the control signal input unit 10 (step 92). If the recording mode is terminated (YES in step 92), the signal recording / reading is performed. The mounting 48 is controlled to record the Vis signal at the video signal recording end point (step 94).

On the other hand, if it is determined in step 86 that the broadcasting method of the last recording channel is not the PAL / SECAM method (NO in step 86), it is determined that the broadcasting method of the last recording channel is the NTSC method and the video tape T is determined. It is determined whether a vis signal is detected while performing the rewind operation (step 98). If the predetermined vis signal is detected (YES in step 98) as a result of the determination, the process proceeds to step 88.

In this case, since NTSC video signals are recorded after ½ of the total playable time, to record PAL / SECAM video signals, the video tape T is first rewound through step 96 to record PAL / SECAM. After moving to the area, the non-signal recorded before the half of the total reproducible time of the video tape T through the step 98 (i.e., the vis signal at the point where the video signal of the PAL / SECAM method is finally recorded). ) And record the PAL / SECAM video signal after that point.

In addition, if the broadcast method of the corresponding recording channel is not PAL / SECAM method as a result of the determination in step 84, it is determined that the broadcast method of the corresponding recording channel is NTSC method (NO in step 84) and stored in the data storage 34. On the basis of the data of the broadcasting method of the last recording channel, it is determined whether the broadcasting method of the last recording channel is the NTSC method (step 100), and as a result of the determination, if the broadcasting method of the last recording channel was the NTSC method (YES in step 100). The controller 18 controls the A / V switching unit 18 so that the TV broadcast signal from the video IF module 16 is applied to the NTSC video signal processing unit 50 and the switching unit 49. The video signal processed by the NTSC video signal processing unit 50 as a recordable signal based on the NTSC method is applied to the signal recording / reading unit 48, and the video is recorded by the signal recording / reading unit 48. To be recorded on the tape (T) (Step 90). At this time, NTSC video signals are recorded from the half of the total playable time of the video tape T.

Subsequently, the control unit 12 determines whether the recording mode is terminated by the control signal input unit 10 (step 92). If the recording mode is terminated (YES in step 92), the signal recording / reading is performed. The mounting 48 is controlled to record the Vis signal at the video signal recording end point (step 94).

On the other hand, if it is determined in step 100 that the broadcasting method of the last recording channel is not NTSC (NO in step 100), if the broadcasting method of the last recording channel is PAL / SECAM, it is operated quickly for the video tape T. It is determined whether a vis signal is detected (step 106), and when a predetermined vis signal is detected, the video tape T is reproduced for a predetermined time to determine whether a synchronization signal is detected in the region after the vis signal is recorded. Judgment (step 110) determines whether the vis signal is the last recorded vis signal.

If the synchronization signal is not detected from the synchronization signal detection unit 54 and no synchronization signal is applied to the control unit 12, the control unit 12 performs the step 102 according to the determination result (YES) in step 110. Proceed to

In this case, since the PAL / SECAM video signal is recorded ½ point before the total playable time, the NTSC recording area is quickly wound by first winding the video tape T through step 106 in order to record an NTSC video signal. After that, the non-signal signal recorded after the half of the total playable time of the video tape T (i.e., the non-signal signal at the point where the NTSC video signal is finally recorded) is detected through step 108. In step 110, it is determined whether the vis signal is the final vis signal, and if the vis signal is the final vis signal, the NTSC video signal is recorded from that point.

Next, the operation of reproducing the recorded video tape T by dividing the PAL / SECAM video signal and the NTSC video signal by the above operation will be described in detail.

When the playback mode is set by the control signal input unit 10, the control unit 12 controls the signal recording / reading unit 48 to read the video signal recorded on the video tape T, and to record the signal. The image signal read and output from the reading unit 48 is applied to the switching unit 49 connected to the rear end and simultaneously applied to the synchronization signal detection unit 58. The synchronization signal detection unit 58 is a horizontal synchronization signal. (HS) and the vertical synchronizing signal (VS) are detected and applied to the scanning athlete detecting unit 56, and the scanning athlete detecting unit 56 is applied to the video signal reproduced based on the horizontal synchronizing signal HS and the vertical synchronizing signal. And the detection result is applied to the control unit 12.

On the other hand, the control unit 12 determines the broadcasting method of the video signal reproduced based on the scanning player, and then controls the switching unit 49 based on the broadcasting method of the video signal, the switching unit 48 Sets the processing path for the video signal output from the signal recording / reading unit 48 to the NTSC video signal processing unit 50 or the PAL / SECAM video signal processing unit 52 side.

Then, the control unit 12 controls the A / V switching unit 18 so that the video signal applied from the NTSC video signal processing unit 50 or the PAL / SECAM video signal processing unit 52 is the NTSC video signal. It is applied to the processing unit 20 or the PAL / SECAM video signal processing unit 22 to be reproduced.

At the same time, the controller 12 controls the vertical / horizontal deflection circuit 58 based on the detected broadcasting method, so that when the vertical / horizontal deflection circuit 32 is a scan player on the CRT screen, the NTSC method is used. In the case of 525 lines and the PAL / SECAM method, a pseudo horizontal / vertical synchronizer signal that is 625 lines is generated and applied to the CRT driving unit 26 so that the CRT driving unit 26 is driven by the pseudo horizontal / vertical synchronizer signal. Allows scanning of 525 or 625 lines on a CRT screen.

As described above, according to the recording control method of the multi-broadcast televideo according to an embodiment of the present invention, when the recording mode is set, the video signal of the PAL / SECAM method and the NTSC method are classified on the video tape T. Since the broadcasting method is switched once from the PAL / SECAM method to the NTSC method during playback of the video tape T, the signal processing during playback of the video tape T can be stabilized, and onto the CRT. It is possible to improve the image quality due to the video signal reproduced and output.

Claims (7)

In the tele-video of the multi-broadcasting system, which reproduces and outputs broadcast signals of NTSC, PAL and SECAM, and reproduces / records a predetermined video / audio signal with respect to the video tape T; Detecting a broadcast method of a recording channel when the recording mode is set; If the result of the detection is that the broadcasting method of the recording channel is the PAL / SECAM method, it is determined whether the broadcasting method of the previous recording channel was the PAL / SECAM method. As a result of the determination, if the broadcasting method of the previous recording channel was the PAL / SECAM method, the video tape T A second step of recording a video signal of a PAL / SECAM method on the computer; In the first step, if the broadcast method of the recording channel is the NTSC method, it is determined whether the broadcast method of the previous recording channel was the NTSC method. As a result of the determination, if the broadcast method of the previous recording channel was the NTSC method, the video tape T is determined. A third step of recording an NTSC video signal; And recording a predetermined VIS signal at a video signal recording end point of the video tape when the recording mode is terminated. The method of claim 1, further comprising: determining whether a vis signal is detected while performing a rewind operation on the video tape T if the broadcast method of the previous recording channel is not a PAL / SECAM method. ; In the multi-broadcast tele-video characterized in that the determination is made if the Vis signal is detected from the point to record the PAL / SECAM video signal from the point, if the non-vis signal is detected How to control recording. 2. The method of claim 1, further comprising: determining whether a vis signal is detected while performing a fast forward operation on the video tape T if the broadcast method of the previous recording channel is not an NTSC method; Determining whether the vis signal is the last vis signal when the vis signal is detected; And if the vis signal is the final vis signal, recording the NTSC video signal from the point, and if the vis signal is not the final vis signal, performing a fast forward operation. Recording control method in broadcasting televideo. 4. The method of claim 3, wherein if the synchronization signal is not detected after the detected vis signal, the vis signal is determined to be the final vis signal. 4. The method of claim 3, wherein if the broadcast method of the previous recording channel is not NTSC, the video tape T is fast-wound up to 1/2 of the total playable time. Recording control method in a multi-broadcast televideo system. The recording control method according to claim 5, wherein the total playable time for the video tape (T) is input by a user before setting the recording mode. 2. A video signal of the PAL / SECAM method is recorded up to 1/2 of the total playable time of the video tape T, and 1/2 of the total playable time of the video tape T is recorded. NTSC video signal is recorded from the recording control method for multi-casting tele-video.