KR19990001262A - Video tape playback control method in tele video - Google Patents

Abstract

The present invention relates to a video tape reproduction control method for televideo, comprising a television function for performing a reproduction processing operation on a broadcast signal transmitted from a broadcasting station, and a video tape (T) driven by a tape driving mechanism (44). In a tele video capable of scheduled recording / playback, in which a video tape recorder function for performing a video recording / playback operation is performed, it is determined whether a synchronization signal is detected from a video signal read from a video tape T with a playback mode set. And if the synchronization signal is detected, the playback operation is performed on the video tape T. If the synchronization signal is not detected, the playback position adjustment operation is performed on the video tape T. And reading out from the video tape T after performing a playback position adjustment operation on the video tape T. When a synchronizing signal is detected from the phase signal, the playback operation is performed on the video tape T, while the video signal read out from the video tape T even after the playback position adjustment operation is performed on the video tape T. And if the synchronization signal is not detected from the video signal T, reproducing the reproduction shift adjustment operation for the video tape T.

Description

Video tape playback control method in tele video

The present invention relates to a method for controlling videotape playback in televideo. More particularly, the present invention relates to stability of a playback picture by setting a CUE mode in a region where a playback state of the videotape is poor. The present invention relates to a method of controlling videotape playback in televideo.

Televisions for reproducing and outputting video signals and audio signals included in broadcast signals transmitted from a broadcasting station are signal-coupled to a video tape recorder (VCR) or a laser disc player (LDP) and reproduced on a video tape or a laser disc. It is also used as a video and audio output device for audio and audio signals. In the related art, a VCR, which is a playback device of a video signal and an audio signal, and a television coupled to the VCR are configured as independent entities, but recently have a complex function. It is a state to propose a televideo (TVCR) by combining a designed television and a VCR.

The tele video includes a series of devices for performing a VCR function, that is, a reel for driving a video tape mounted in a deck at a constant speed, and a video / audio signal recorded on the video tape, A plurality of audio / video heads for recording video / audio signals, amplification means for amplifying video / audio signals read by the audio / video heads, and the audio / video heads are externally installed so that the audio / video heads And a drum which rotates synchronously to read the video / audio signal recorded on the video tape or to record the video / audio signal on the video tape.

When the video tape is set in the deck equipped with the tele video and the playback mode is set for the video tape, the video / audio signal recorded on the video tape is output through the CRT screen and the speaker of the tele video. At this time, if the video signal recorded on the video tape is damaged, a screen containing a noise signal is output through the CRT screen, or a screen with an unstable output state is output.

In such a state, the user manually sets the CUE mode (ie, quick view mode) on the video tape to adjust the output state of the screen, skips the playback area containing the damaged video signal, and plays back the normal video signal. In this case, the state of the screen output through the CRT screen is improved. In this case, when the damaged video signal area is relatively large, it is inconvenient for the user to check the screen output state and adjust the setting of the CUE mode. .

Accordingly, the present invention has been made in view of the above circumstances, and when the playback operation is performed, the stability of the playback screen can be provided by setting the CUE (quick view) mode for a region in which the playback state of the video tape is poor. It is an object of the present invention to provide a method of controlling videotape playback in digital video.

According to the present invention for realizing the above object, there is provided a television function for performing a playback processing operation for a broadcast signal transmitted from a broadcasting station, and a video tape for performing a recording / playback operation for a video tape driven by a tape driving mechanism. In a tele video capable of reserved recording / playback in which a recorder function is mixed, determining whether a synchronization signal is detected from a video signal read from a video tape while a playback mode is set, and if the synchronization signal is detected as a result of the determination, While performing a playback operation on the video tape, if the synchronization signal is not detected, performing a playback position adjustment operation on the video tape; and performing the playback position adjustment operation on the video tape. If a sync signal is detected from a video signal read from While the playback operation is performed on the video tape, if the synchronization signal is not detected from the video signal read out from the video tape even after performing the playback position adjustment operation on the video tape T, the playback position adjustment on the video tape is performed. Provided is a videotape playback control method for televideo, which comprises a step of performing an operation again.

According to the present invention made up of the above steps, if a video signal read from the video tape is damaged and no synchronization signal is detected from the video signal, the CUE mode for the video tape is automatically set so that a normal video signal from the video tape is obtained. Since the corresponding CUE mode is set until reading, the user can eliminate the trouble of manually setting the playback position of the video tape in consideration of the screen output through the CRT screen.

1 is a block diagram of a tele video to which the present invention is applied;

2 is a flowchart illustrating a videotape playback control method in 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,

16: OSD processing unit, 18: tuner,

20: audio IF module, 22: video IF module,

24: A / V switching unit, 26: audio signal processing unit,

28: audio amplifier, 30: video signal processing,

32: video amplifier, 40: data storage,

42: display unit, 44: tape driving mechanism,

46: signal recording reading unit, 48: video / audio signal processing unit,

50: Sync signal detection unit.

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

1 is a block diagram of a tele video to which the present invention is applied. In FIG. 10, reference numeral 10 denotes a control signal input unit for controlling the overall function of a corresponding tele video. Remote control is applied to the remote control of the video or a control panel defined on the front of the tele-video, the control signal input unit 10 in the present invention, the main power on / off button for setting the main power on / off function And a TV / VCR mode setting button for selectively switching and setting a TV / VCR mode, a series of buttons for controlling the television function, and a series of buttons for controlling the video function, for example, a playback key for setting the playback mode. And a stop key for stopping the playback operation, a stop key (STOP) for stopping the reservation recording, and the like.

Reference numeral 12 is a control unit for controlling the overall function of the tele-video corresponding to a plurality of button operations for setting the control function provided in the control signal input unit 10, in the present invention, the control unit 12 is a playback mode is set If the synchronization signal is not detected from the video signal reproduced in the state, the CUE mode is automatically set to perform the control operation so that the playback position of the video tape T is adjusted.

In addition, reference numeral 16 is an OSD processing unit for generating a predetermined OSD text signal to OSD display the function set by the control signal input unit 10 on the CRT screen under the control of the control unit 12, 18 is an antenna. A tuner for tuning a specific channel based on a tuning voltage VT read and provided from the channel data storage unit 14 under control of the control unit 12 among a plurality of broadcast channels.

Reference numeral 20 is an audio IF module for extracting and IF-converting the audio signal for the channel selected by the tuner 18, and 22 is an image for IF conversion by extracting the video signal for the channel selected by the tuner 18. An IF module, and 24 denotes an image / audio signal applied by the video / audio IF module 20 and 22 and an image / audio signal applied by the video / audio signal processor 48 to be described later from the controller 12. A path for recording a video / audio signal applied from the video / audio IF modules 22 and 20 on the video tape T by performing a predetermined switch operation based on the output mode switching signal SW. The A / V switching unit sets a path for reproducing and outputting the video / audio signal from the video / audio signal processor 40 to be described later through the CRT apparatus and the speaker SP.

In addition, reference numeral 26 denotes a voice signal that is switched and output from the A / V switching unit 24 and is set in the control signal input unit 10, for example, to perform a voice processing operation such as volume control, voice surround or voice multiplex processing. A voice signal processor for amplifying the voice signal output from the voice signal processor 26 and reproducing it through a speaker SP as a voice output device connected to a rear stage, and 30 denotes the control. An image signal processing unit for performing an image related processing function designated by the signal input unit 10, for example, adjusting luminance / contrast, or inserting an OSD text signal generated by the OSD processing unit 16 on the screen. An image amplifying unit which amplifies the image signal processed by the image signal processing unit 30 to be displayed on the CRT device.

In FIG. 1, reference numeral 40 denotes a data storage unit for storing, for example, a reservation channel for reservation recording, a recording start time / reservation end time, etc. set by the control signal input unit 10, and 42 denotes the controller ( 12 is a display unit which performs a fluorescent display, i.e., a status display including a playback mode and a playback time of the video tape T, under the control of 12).

Further, reference numeral 44 denotes a tape driving mechanism for driving the video tape T under the control of the control unit 12 based on a function set on the basis of a button operation configured in the control signal input unit 10. The mechanism 44 is provided with a reel motor (not shown) and a drum motor (not shown) for driving the video tape T. The video tape T is driven in the forward and reverse directions by driving the reel motor and the drum motor. Drive with

Reference numeral 46 denotes a plurality of audio / video heads configured to read audio / video signals from the video tape T driven by the tape driving mechanism 44 or to output video and audio signals to the video tape T. A signal recording / reading unit for recording, and 48 denotes a path for performing reproduction processing for the audio signal and the video signal recorded on the video tape T read by the signal recording / reading unit 46; A video / audio signal processor having a path for processing video signals and audio signals to be recorded on the video tape T by the signal recording / reading section 46.

Reference numeral 50 denotes a synchronization signal detection unit for detecting a synchronization signal from the video signal output from the A / V switching unit 24 and analyzing the degree of damage of the video signal.

The operation according to the television function in the televideo having the above-described configuration will be briefly described.

The controller 12 applies the tuning voltage VT corresponding to the tuning signal to the tuner 18 when the tuning signal for a specific channel is input after the power is turned on by the control signal input unit 10. Accordingly, the voice signal of the channel tuned by the tuner 18 is extracted from the voice IF module 20, IF converted, and then applied to the voice signal processor 26 through the A / V switching unit 24. The voice signal processing unit 22 processes the voice signal based on the volume control signal or the voice multiple control signal set through the control signal input unit 10 and applies the voice signal to the voice amplifier 28. The audio signal amplified by the amplifier 28 is applied to the speaker SP and is reproduced and output.

In addition, the video signal of the channel tuned by the tuner 18 is extracted from the video IF module 26 and IF converted, and then applied to the video signal processor 28 via the A / V switching unit 24. In addition, the image signal processing unit 28 performs RGB processing for reproducing the video signal, and performs insertion processing of the OSD text signal provided by the OSD processing unit 16 under the control of the control unit 12. The video signal is applied to the video amplifier 32, and the video signal amplified by the video amplifier 32 is output on the CRT apparatus.

Hereinafter, a method of controlling videotape playback in 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 the user inserts the video tape T into the video tape storage unit, mounts the video tape T in the deck, and sets the playback mode using the playback key configured in the control signal input unit 10 ( In step 70), the control unit 12 performs a playback operation on the video tape T (step 71).

That is, in step 71, the control unit 12 applies a predetermined control signal to the tape driving mechanism 44 and the signal recording / reading unit 46 to record the video / audio signal recorded on the video tape T. The video / audio signal read out by the audio / video head configured in the signal recording / reading section 46 is applied to the video / audio signal processing section 48 to be processed as a playable signal, and then A / V switching unit 24 is applied.

At the same time, the control unit 12 applies a predetermined switching signal SW to the A / V switching unit 24 so that the video / audio signal from the video / audio signal processing unit 48 is output to the audio signal processing unit ( 26) and the video signal processor 30, and the voice signal processor 26 performs a voice processing operation on the voice signal and then transfers the voice signal to the voice amplifier 28. The audio signal is amplified by the audio amplifier 28 to be reproduced and output through the speaker SP. At the same time, the video signal processor 30 performs an image processing operation on the video signal. The processed video signal is applied to the video amplifier 32 so that the video signal is amplified by the video amplifier 32 and reproduced through the CRT.

While performing the above operation, the control unit 12 determines whether a reproduction stop signal is input from the control signal input unit 10 (step 72), and when it is determined that the reproduction stop signal is input from the control signal input unit 10. (YES in step 72) The tape drive mechanism 44 applies a predetermined control signal to the signal recording / reading section 46 to stop the playback operation performed in step 71.

However, if it is determined in step 72 that the input state of the reproduction stop signal is not determined from the control signal input unit 10 (NO in step 72), it is determined whether the synchronization signal is detected by the synchronization signal detection unit 50. (Step 74).

Here, when the video signal read out from the video tape T is in a good state, the sync signal detector 50 detects the sync signal from the video signal switched and output by the A / V switching unit 24. According to the determination result (YES) in step 74, the control unit 12 receives the corresponding synchronization detection signal from the synchronization signal detection unit 50. Proceed to continue playback operation.

However, if the video signal read from the video tape T is damaged and the sync signal of the video signal is lost or disappeared, the sync signal detector 50 outputs the video output from the A / V switching unit 24. The synchronous signal is not detected from the signal, and therefore, the synchronous detection signal is not applied to the controller 12.

Accordingly, the control unit 12 proceeds to step 75 according to the determination result NO in step 74 and selects the tape driving mechanism 44 and the signal recording / reading unit 46 to automatically set the CUE mode. A control signal is applied to adjust the traveling speed of the video tape T (step 75).

While performing the above operation, the control unit 12 proceeds to step 74 and constantly checks whether the synchronization signal is detected by the synchronization signal detection unit 50, and if the synchronization signal is detected by the synchronization signal detection unit 50 as a result of the determination. Proceeding to step 71, the entire apparatus is controlled to perform a normal playback operation on the videotape.

As described above, according to the videotape playback control method for televideo according to an embodiment of the present invention, if the video signal read from the videotape is damaged and normal reproduction of the video signal is difficult, the quick view mode is automatically activated. By skipping the playback area of the video tape on which the damaged video signal is recorded and adjusting the playback position to the area where the normal video signal is recorded on the video tape, the user sets the viewing mode quickly so that the playback position of the video tape can be set. This can eliminate the hassle of adjusting.

Claims (2)

A reservation in which a television function for performing a reproduction processing operation for a broadcast signal transmitted from a broadcasting station and a video tape recorder function for performing a recording / reproducing operation for a video tape T driven by the tape driving mechanism 44 are mixed. In televideo recording / playback, Determining whether a synchronization signal is detected from a video signal read out from the video tape T while the playback mode is set; If the synchronous signal is detected as a result of the determination, performing a playback operation on the video tape T; if the synchronous signal is not detected, performing a playback position adjustment operation on the video tape T; If a synchronization signal is detected from the video signal read out from the video tape T after the playback position adjustment operation is performed on the video tape T, the playback operation is performed on the video tape T. Reconstructing the playback adjustment operation for the video tape T if the synchronization signal is not detected from the video signal read out from the video tape T even after performing the playback position adjustment operation for the tape T. A video tape reproduction control method in tele video. 2. The playback position adjustment operation for the videotape (T) is characterized in that the control unit (12) automatically sets the CUE mode to control the tape drive mechanism (44) and the signal recording / reading unit (46) to control the video. A video tape reproduction control method for televideo, which is performed by increasing the running speed of the tape (T).