KR100207182B1 - Fbt noise reduction apparatus for televideo - Google Patents

Abstract

The present invention cancels the FBT oscillation sound output device of the tele video to cancel the FBT oscillation sound generated through the speaker and output a pre-stored sound signal when a high-speed search such as rewind playback or fast forward playback is performed during the playback of the televideo. To provide.

Accordingly, the present invention provides a televideo capable of reproducing image information recorded on a video tape, recording of a predetermined channel broadcast program through a tuner 2, and reproducing a video / audio of a tuned broadcast program. In addition to prohibiting the audio output of the audio signal according to the FBT oscillation sound from the audio processing means 26 and 28 in rewinding or fast-forwarding the recorded information of the tape, a separate sound signal is outputted to the audio output unit ( 32, a voice switching means 30 which is switched to output a voice via a medium, a voice memory means 34 in which predetermined sound data is stored in advance, and rewinding or fast-forwarding the recorded information of the video tape. Voice data converting means 36 for converting sound data from the memory means 34 so as to enable voice output and outputting the sound data through the voice switching means 30; Switching and controlling the voice switching means 30 during the rewinding or fast-forwarding playback of the video tape by the key operation of the function setting unit 40 to prohibit the output of the voice signal according to the FBT oscillation sound. And a control means 42 for controlling the audio signal read out from the voice memory means 34 to enable voice output.

Description

FBT oscillation output prevention device of tele video

The present invention relates to a device for preventing the output of FBT oscillation sound of televideo, and more particularly, to cancel the oscillation sound of FBT (Fly Back Transformer) generated during high speed search during playback of videotape in televideo. An apparatus for preventing FBT oscillation sound output.

Conventionally, a video tape recorder performs an operation of reproducing a video signal and an audio signal recorded magnetically on a video tape, and a television is a video / audio signal of a broadcast program transmitted wirelessly or by wire from a broadcasting station. It has a function of playing video / audio of video signal and audio signal which are played back or transmitted from an external video playback device such as a video tape recorder. In this regard, a television and a video tape recorder are generally connected to a transmission cable of a video / audio signal. The video / audio signal of the video tape or the video / audio signal for the program of the television broadcast is reproduced according to the setting state of the video mode or the television mode.

In other words, conventionally, a television and a video tape recorder are configured as independent components to exchange video / audio signals by means of a connection cable. At present, a video / audio signal reproducing function and a video tape recorder / Televideo (TVCR), which combines playback and recording functions of audio signals, has been developed and commercialized.

According to such a televideo, a tuning function for tuning a broadcast program transmitted from a plurality of broadcasting stations, a channel memory function searched by the tuning function, a video / audio signal or a videotape according to a broadcast program of a tuned channel A reproducing function for reproducing recorded information on a video / audio and an instant recording function and a reservation recording function for recording a broadcast program for a television channel of a predetermined channel currently being reproduced on a recording surface of a video tape are integrated.

In addition, in the state of reproducing the video information recorded on the recording surface of the video tape mounted in such a televideo, the fast search and rewinding playback or fast playback in a non-playing state such as rewinding (REW) or fast forwarding (FF) to a desired recording surface. High-speed search is performed in a regeneration state such as cold regeneration.

However, in such a tele video, when rewinding or fast-forwarding is performed in order to quickly search for a desired desired recording surface in the state of playing the video tape, the synchronization signal included in the video information recorded on the recording surface of the video tape is unstable. As the high-pressure phase of the FBT driven by the horizontal output signal obtained by the corresponding synchronization signal becomes unstable, there is a disadvantage that the discomfort of the viewer is increased by the output of unwanted FBT oscillation sound through the speaker.

Accordingly, the present invention has been made in view of the above circumstances, and when a high-speed search such as rewind playback or fast forward playback is performed during tele video playback, the FBT oscillation sound generated through the speaker is canceled and a prestored sound signal is output. It is an object of the present invention to provide a device for preventing the output of FBT oscillation sound of televideo.

In order to achieve the above object, according to the apparatus for preventing the output of the FBT oscillation sound of the tele-video according to the present invention, the video information recorded on the videotape, and the recording and tuning of the broadcast program of the predetermined channel tuned through the tuner In a tele video capable of video / audio reproduction of a program, the audio output of the audio signal according to the FBT oscillation sound from the audio processing means is prohibited while rewinding or fast-forwarding the recorded information of the video tape. Voice switching means for switching the sound signal so that the separate sound signal is output through the voice output unit, a voice memory means in which predetermined sound data is stored in advance, the rewinding playback or fast-forward playback of the recorded information of the video tape The sound switching is performed by converting the sound data from the memory means into a sound output. Switching and controlling the voice switching means during the rewinding or fast-forwarding playback of the video tape by the key operation of the voice data conversion means and the function setting unit outputted through the means so that the output of the voice signal according to the FBT oscillation sound is prohibited. In addition, the present invention provides an apparatus for preventing FBT oscillation sound output of a tele video, comprising control means for controlling the sound signal read out from the sound memory means to be sound output.

According to the present invention configured as described above, when rewinding or fast-forwarding a playback function to perform a high-speed search for a recording surface of a corresponding video tape during a playback function for video information recorded on a video tape in a tele video, the rewind playback or Instead of prohibiting the output of the FBT oscillation sound due to the instability of the synchronous signal generated by the fast-winding playback state, a separately stored sound signal can be output through the speaker.

1 is a block diagram showing a device for preventing the output of FBT oscillation sound of a tele video according to the present invention,

2 is a flowchart illustrating the operation according to the preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

2: Tuner 4: Video IF unit

6: mode switching unit 8: recording signal processing unit

10: recording amplifier 12: signal recording / reading unit

14: recording / playback driving mechanism 15: second microphone

16: playback amplifier 18: playback signal processing unit

20: Image detector 22: Image signal processor

24: image output unit 26: voice detector

28: voice signal processing unit 30: voice switching unit

32: voice output section 34: voice memory

36: voice data conversion unit 40: function setting unit

42: first microcomputer

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an apparatus for preventing FBT oscillation sound output of a tele video according to the present invention. In the apparatus of the present invention, reference numeral 2 denotes a channel for tuning a predetermined channel from the first microcomputer 42 to be described later. A channel tuner that receives channel tuning data VT and tunes a corresponding channel and mixes and outputs a local oscillation frequency signal generated by the channel tuning data VT, and 4 represents a tuner of the tuned intermediate frequency type. An image IF unit for amplifying a television broadcast signal in an image intermediate frequency is shown.

Also, reference numeral 6 denotes a television broadcast which is made to perform a playback function or a recording function according to the video mode or the tuner 2 according to the television mode by mode switching control by the first microcomputer 42 described later. The mode switching unit is switched to switch the playback of the program.

Also, reference numeral 8 denotes a recording signal for signal-modulating a signal capable of receiving a television broadcast signal tuned through the tuner 2 via the mode switching unit 6 according to the execution of the recording function according to the video mode. 10 shows a recording amplifier which amplifies the signal modulation processed television broadcast signal to a recordable signal level.

Reference numeral 12 comprises a plurality of magnetic heads provided in a head drum (not shown) to record the recorded television broadcast signal on the recording surface of the video tape, and to record on the video tape according to the execution of the playback function. Signal recording / reading unit for reading recorded information is shown.

Further, reference numeral 14 denotes the constant speed driving of the head drum equipped with the signal recording / reading unit 12 and the recording information reproduction or high speed search (i.e., rewinding reproduction or Recording / playback driving mechanism for servo-controlling a driving state for fast-forward / playback or recording of a television broadcast signal.

Reference numeral 15 denotes a first control unit which performs servo control for reproducing or rewinding or fast-forwarding playback of recorded information of a videotape according to a video mode or controlling fast forward playback according to a video mode through control communication with the first microcomputer 42 described later. 2 microcomputers.

Reference numeral 16 denotes a reproduction amplifier section which amplifies the recording information from the video tape read out through the signal recording / reading section 12 so that reproduction of the read recording information is possible. A reproduction signal processing unit for demodulation processing is shown.

Reference numeral 20 denotes an image detector for detecting a recorded video signal from a video tape or a video signal of a television broadcast, which are input through the mode switching unit 6 according to a playback function or a television mode in a video mode. And 22 denotes an image signal processing unit which separates the detected image signal into a luminance signal and a color difference signal, performs luminance adjustment and color demodulation processing, and then synthesizes the composite image signal and outputs the result. Amplifying the composite video signal to be output through the CRT screen, and driving the horizontal / vertical deflection coil of the CRT through the horizontal / vertical output signal of the horizontal / vertical synchronization signal included in the video signal. Indicates an output part.

Reference numeral 26 denotes a voice detector for detecting a recorded voice signal from a video tape input through the mode switching unit 6 or a voice signal of a television broadcast in accordance with a playback function in a video mode or a television mode. 28 denotes a voice signal processing unit for performing volume control, sound quality adjustment, and stereo signal processing or voice multiplex processing according to the detected voice signal.

Further, reference numeral 30 denotes an FBT oscillation sound generated by an unstable synchronization signal due to a fast search according to the video mode from the first microcomputer 42 described later, that is, a switching control resulting from the execution of a rewind playback or fast forward playback function. According to the present invention, a voice switching unit is switched so that the output of the voice signal is prohibited and a voice output from the voice memory 34 to be described later is switched. 32 denotes a voice signal through the voice switching unit 30. An audio output unit for amplifying power and outputting the power through a speaker is described.

Reference numeral 34 denotes, for example, a PROM in which sound data having a predetermined sound is stored in advance, and the stored sound data is read by receiving an address ADD and control data DATA from the first microcomputer 42 described later. The voice memory shown in Fig. 36 shows the audio data read-out of the voice memory 34 by enable control (ENA) from the first microcomputer 42 to be described later, so that the audio can be decoded and analog-converted. A voice data conversion unit output to the switching unit 30 side is shown.

Further, reference numeral 40 is composed of a matrix button unit provided in a predetermined portion of a remote controller for remote control or the main body of the main body, and executes a command for executing a video tape playback or recording function according to a video mode or a rewind play or fast forward play function for fast search. And a function setting unit for key setting an execution command for reproducing a television broadcast signal according to the television mode.

Further, reference numeral 42 denotes a connection with the second microcomputer 15 in response to execution of a rewind playback or fast forward playback function for fast search for the video tape in the video mode by the key operation of the function setting section 40. FIG. Rewind playback or fast forward playback of the video tape is performed through control communication, and an address ADD and control data DATA are provided to the voice memory 34 so that the prestored sound data is read. A first microcomputer for switching control of the voice switching unit 30 so as to enable audio output of the sound signal converted by the enable control (ENA) of the data conversion unit 36 is shown.

Next, the operation of the present invention made as described above will be described in detail with reference to the flowchart of FIG. 2.

First, in the case where the playback function according to the video mode is set by the function setting unit 40 while the video tape including the predetermined image information is mounted in step 50, the first microcomputer 42 switches the mode switching unit 6. ), The recording / playback driving mechanism 14 is servo-controlled by the control communication with the second microcomputer 15 to control the playback function according to the video mode, and the read operation is performed by the signal recording / reading unit 12. In this way, the recorded information recorded on the videotape is read and reproduced.

In that state, the process proceeds to step 51 where the first microcomputer 42 makes a key for executing a fast search, i.e., a rewind play or a fast rewind play function, on the video tape in which the function setting unit 40 is in the play state. It is determined whether the operation is being performed.

As a result of the determination in step 51, when the first microcomputer 42 determines that the function setting unit 40 is performing a key operation for executing the rewind playback or the fast forward playback function, the control proceeds to step 52 and the voice is By sending the address ADD and the control data DATA to the memory 34, predetermined sound data stored in advance are read out and decoded by the voice data conversion unit 36 which is in an enabled state so that the voice is converted to analog. Switching control of the switching unit 30 allows the sound signal to be output through the speaker through the power amplification through the voice output unit 32.

Accordingly, the signal is recorded and read by the signal recording / reading unit 12, and is output through the mode switching unit 26 through the signal amplification process of the reproduction amplifier unit 16 and the signal demodulation process of the reproduction signal processing unit 18. The output of the FBT oscillation sound from the FBT due to the unstable state of the synchronization signal included in the information through the audio signal processing unit 28 is prohibited.

Then, the process proceeds to step 53 where the first microcomputer 42 performs a key operation for reproducing the recorded information from the video tape that the function setting unit 40 was rewinding or fast-forwarding at a normal playback speed. Judge whether

As a result of the determination in step 53, if it is determined that the function setting section 40 is performing key operation for playing the video tape at the normal playback speed, control proceeds to step 54 and the address from the voice memory 34 is reached. The transmission of the ADD and the control data DATA is stopped, and the enable state of the voice data converter 36 is prohibited, and the voice switch 30 is switched to read from the video tape. The recorded voice signal according to the recorded information is amplified by the voice output unit 32 through the detection operation of the voice detector 26 and the voice signal processing of the voice signal processor 28 so that the voice can be normally output by the speaker. do.

According to the present invention made as described above, by prohibiting the output of the FBT oscillation sound generated by the unstable state of the synchronization signal in accordance with the high-speed search operation of the video tape in the tele-video and pre-stored sound signal can be output Therefore, it is possible to provide a user with convenience while preventing unwanted output of the FBT oscillation sound.

Claims (1)

A televideo capable of reproducing image information recorded on a videotape, recording of a predetermined channel broadcast program through a tuner 2, and video / audio reproduction of a tuned broadcast program, wherein the recorded information of the videotape In addition to prohibiting the voice output of the voice signal according to the FBT oscillation sound from the voice processing means (26, 28) during the rewind playback or the fast forward playback, a separate sound signal is transmitted through the voice output unit 32. A voice switching means 30 which is switched to output a voice, a voice memory means 34 in which predetermined sound data is stored in advance, and the voice memory means 34 when rewinding or fast-forwarding the recorded information of the video tape. Key data of the voice data converting means 36 and the function setting unit 40 for converting sound data from the sound data from the sound converting means 30 and outputting the sound data through the voice switching means 30. The audio switching means 30 is controlled to switch when the rewinding or fast-winding playback of the video tape is performed, thereby preventing the output of the audio signal according to the FBT oscillation sound and reading from the voice memory means 34. An apparatus for preventing FBT oscillation sound output of a tele video, characterized in that it comprises a control means (42) for controlling the output of the sound signal.