JP3460470B2 - Magnetic recording / reproducing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a magnetic recording / reproducing apparatus capable of displaying a special reproduction state of a recording tape on a TV screen. 2. Description of the Related Art In recent years, a magnetic recording / reproducing apparatus has been required to have a function of knowing recorded contents in advance, that is, a so-called tape check function, for reproducing a recording tape. Hereinafter, a conventional magnetic recording / reproducing apparatus will be described with reference to FIG. FIG. 3 is a block diagram showing a configuration of a conventional magnetic recording / reproducing apparatus. In FIG. 3, reference numeral 21 denotes an operation unit for performing various operations.
The operation unit includes a tape check operation unit for executing a tape check command. Reference numeral 25 denotes a control head for reproducing a control signal recorded on the magnetic tape 24, and reference numeral 26 denotes a VISS for detecting a VISS signal from the control signals reproduced by the control head 25.
In the signal detection unit, the VISS signal is duty-modulated and recorded at the beginning of the recorded program. 27 is a magnetic head for extracting a video signal recorded on the magnetic tape 24, 23 is a reproducing unit for reproducing the video signal extracted by the magnetic head 27, and 22 is a reproducing unit when various operation commands are performed by the operation unit 21. A control unit that controls the switch 23 and performs a switching control of a switch circuit 28 described later when a VISS signal is detected by the VISS signal detection unit 26; an antenna 29 that receives a television signal;
Is a television signal input terminal for inputting a television signal received by the VTR main body 30;
A switching circuit for switching between outputting the reproduced video signal reproduced by the reproducing unit 23 or outputting the television signal received by the antenna 29 under the control of the control unit 31;
Is a television receiver (hereinafter, referred to as a TV receiver) that projects a video signal output from the TV receiver. The operation of the conventional magnetic recording / reproducing apparatus configured as described above will be described below. First, when performing a tape check, the magnetic tape 24 is rewound to the start end, a tape check operation unit (not shown) in the operation unit 21 is operated, and an operation command signal is input to the control unit 22. Based on the operation command, the control unit 22 drives the magnetic tape 24 to fast-forward, switches the switch circuit 28 to the b side, and transmits the television signal received by the antenna 29 via the television signal input terminal 32 and the switch circuit 28. Input to the TV receiver 31 for projection. The control head 25 constantly detects a control signal recorded on the magnetic tape 24 during the fast-forward, and inputs the control signal to a VISS signal detector 26. And if there is a VISS signal in the control signal,
The VISS signal detection unit 26 detects this VISS signal,
This information is output to the control unit 22. The control unit 22 is VIS
When recognizing that the S signal has been detected, the control unit controls the reproduction unit 23 to switch to the fast-forward reproduction state, and controls the switch circuit 28 to switch to the a side. Then
The video signal during fast-forward playback extracted by the magnetic head 27 is played back by the playback unit 23,
It is input to the receiver 31. The TV receiver 31 displays the video signal of the fast-forward reproduction, that is, the video signal of the first part of the program recorded on the magnetic tape 24 by the fast-forward reproduction. Can be confirmed. After playing this fast-forward playback video for several seconds,
The control unit 22 switches the switch circuit 28 to the b side and stops the fast forward reproduction of the reproduction unit 23. Then, the magnetic tape 24 is set to the fast-forward state until the next VISS signal is detected. Subsequent operations are the same as described above. However, in the above-described conventional configuration, the television signal projected on the TV set 31 and the tape check function operate during the fast-forward state when the tape check function operates. Since the television signal projected on the TV set 31 cannot be distinguished when it is not present, there is a problem that it cannot be confirmed whether the tape check function is operating. An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a magnetic recording / reproducing apparatus capable of displaying an operation state of a tape check function on a TV screen. In order to achieve this object, a magnetic recording / reproducing apparatus according to the present invention comprises a VISS signal detecting section for detecting a VISS signal recorded on a magnetic tape, and the VISS signal detecting section. An OSD that generates a first image signal when a VISS signal is detected and generates a second image signal when a VISS signal is not detected; a television signal input terminal that inputs a television signal from outside; A reproducing unit for reproducing a video signal recorded on the magnetic tape; a control unit for controlling the reproducing unit to fast-forward reproduce the magnetic tape when a VISS signal is detected by the VISS signal detecting unit; Switching to output by switching between a television signal input from a signal input terminal and a video signal fast-forward reproduced by the reproduction unit Means for mixing the output signal of the switching means and the output signal of the OSD, and outputting the mixed signal. The operating state of the tape check function can be displayed on a TV screen. An object of the present invention is to provide a recording and reproducing device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to the first aspect of the present invention is a method for detecting a VISS signal recorded on a magnetic tape.
The ISS signal detection unit and the VISS signal detection unit
An OSD that generates a first image signal when an ISS signal is detected and generates a second image signal when a VISS signal is not detected, a television signal input terminal that inputs a television signal from outside, A reproducing unit for reproducing a video signal recorded on a magnetic tape; a control unit for controlling the reproducing unit to fast-forward reproduce the magnetic tape when a VISS signal is detected by the VISS signal detecting unit; Switching means for switching and outputting a television signal input from an input terminal and a video signal fast-forward-reproduced by the reproducing unit; mixing for mixing and outputting an output signal of the switching means and an output signal of the OSD Means. With such a configuration, the operation state of the tape check function can be displayed on the TV screen. Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of an embodiment of a magnetic recording / reproducing apparatus according to the present invention, and FIG. 2 is a schematic diagram showing a display state of a TV receiver in this embodiment. In FIG. 1, reference numeral 1 denotes an operation unit for performing various operations. The operation unit includes a tape check operation unit for executing a tape check command. Reference numeral 5 denotes a control head for reproducing a control signal recorded on the magnetic tape 4, and reference numeral 6 denotes a VISS signal detecting unit for detecting a VISS signal from the control signals reproduced by the control head 5.
The SS signal is duty-modulated and recorded at the beginning of the recorded program. 7, a magnetic head for extracting a video signal recorded on the magnetic tape 4;
A playback unit for playing back the video signal extracted in step 1;
Controls the playback unit 3 when various operation commands are issued,
When the VISS signal is detected by the VISS signal detection unit 6, fast-forward reproduction control of the reproduction unit 3 and a switch circuit 8 described later
, A control unit for performing a switching control of a television signal, an antenna 9 for receiving a television signal, a television signal input terminal 14 for inputting a television signal received by the antenna 9 to the VTR main body 10, and a reference numeral 8 A switching circuit for switching between outputting a reproduced video signal reproduced by the reproducing unit 3 or outputting a television signal received by the antenna 9 under control is a video tape recorder main body (hereinafter referred to as VT).
Reference numeral 11 denotes a television receiver (hereinafter, referred to as a TV receiver) for displaying the video signal output from the switching circuit 8, and reference numeral 12 denotes the TV receiver 11 when the tape check function is operating. An on-screen display circuit (hereinafter, referred to as OSD) for generating an image signal such as a character superimposed on the video signal, and 13 a mixing circuit for mixing the image signal generated by the OSD 12 and the video signal output from the switching circuit 8 It is. The operation of the magnetic recording / reproducing apparatus according to the present embodiment having the above-described configuration will be described below. First, when performing a tape check, the magnetic tape 4 is rewound to the start end, a tape check operation unit (not shown) in the operation unit 1 is operated, and the operation command signal is transmitted to the control unit 2.
Enter The control unit 2 sets the magnetic tape 4 in the fast-forward state based on the operation command, and switches the switch circuit 8
Switch to the side. After the fast-forward of the magnetic tape 4 is started, the control signal recorded on the magnetic tape 4 is reproduced by the control head 5 and input to the VISS signal detection unit 6. When the VISS signal is not detected by the VISS signal detector 6, the magnetic tape 4 continues to be fast-forwarded. When the switch circuit 8 is switched to the side b, the television signal received by the antenna 9 becomes
The signal is input to the mixing circuit 13 via the television signal input terminal 14 and the switch circuit 8. On the other hand, the control unit 2
The OSD 12 generates an image signal composed of a character “searching” and a graphic meaning fast-forward as shown in FIG. In the mixing circuit, the image signal generated by the OSD 12 is superimposed on the television signal output from the switch circuit 8 and output to the TV receiver 11 for projection. Thus, the magnetic tape 4
During fast-forwarding, the TV receiver 11 constantly displays an image signal "searching" as shown in FIG. 2A. The control head 5 constantly detects the control signal recorded on the magnetic tape 4 during the fast-forward, and inputs the control signal to the VISS signal detector 6. If a VISS signal is included in the control signal, VI
The SS signal detection unit 6 detects the VISS signal and outputs this information to the control unit 2. When the control unit 2 recognizes that the VISS signal has been detected, the control unit 2 controls the reproduction unit 3 to switch to the fast-forward reproduction state, and sets the switch circuit 8 to a
Control to switch to the side. Then, the magnetic tape 4 is fast-forward-played by the playback unit 3, and the fast-forward-played signal is input to the mixing circuit 13 via the switch circuit 8. Further, the control unit 12 controls the OSD 12
Reference numeral 12 generates an image signal composed of a character "reproduction" and a graphic meaning reproduction as shown in FIG. In the mixing circuit 13, the image signal generated by the OSD 12 is superimposed on the fast-forward reproduction signal output from the switch circuit 8 and output to the TV receiver 11 for projection. After displaying the fast-forward reproduced video on which the image signal is superimposed as shown in FIG. 2B for several seconds, the control unit 2 switches the switch circuit 8 to the b side and simultaneously controls the reproduction unit 3. Stop fast forward playback. And magnetic tape 24
In the fast-forward state again until the next VISS signal is detected, and a television signal in which an image signal is superimposed on a television signal is displayed on the TV receiver 11 as shown in FIG. Subsequent operations are the same as described above. As described above, according to the present embodiment, during the operation of the tape check function, the video signal on which the image signal generated by the OSD 12 is superimposed is displayed on the TV receiver 11, thereby enabling the operation state of the tape check function. Can be easily grasped. As described above, according to the present invention, there is an excellent effect that the operation state of the tape check function can be easily and reliably confirmed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a magnetic recording / reproducing apparatus according to the present invention. FIG. 2 is a schematic diagram showing a display screen of a TV receiver during a tape check function operation in the embodiment. FIG. 3 is a block diagram of a conventional magnetic recording / reproducing apparatus. [Description of References] 3 Reproducing section 4 Magnetic tape 6 VISS signal detecting section 8 Switching circuit 12 OSD 13 Mixing circuit 14 Television signal input terminal

Claims (1)

(57) Claims: 1. A VISS signal detecting section for detecting a VISS signal recorded on a magnetic tape, and a first image signal when a VISS signal is detected by the VISS signal detecting section. When the VISS signal is generated and no VISS signal is detected, the second
An OSD for generating an image signal, a television signal input terminal for externally inputting a television signal, a reproducing unit for reproducing the magnetic tape, and the magnetic tape when a VISS signal is detected by the VISS signal detecting unit. A control unit that controls the playback unit to perform fast-forward playback, switching means for switching and outputting a television signal input from the television signal input terminal and a video signal fast-forward played back by the playback unit, Mixing means for mixing and outputting the output signal of the switching means and the output signal of the OSD , wherein the output signal of the OSD is an output signal of the magnetic tape.
Displays the display contents corresponding to the forward or fast-forward playback state.
Magnetic recording and reproducing apparatus, characterized in that Shimesuru.