JPH03256253A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To automatically eliminate a commercial, etc., by outputting a command signal based on a specified mode discriminating signal corresponding to a sound mode and stopping a recording operation of a receiving signal upon noncoincidence between an output level of this command signal and an output level of the sound signal mode. CONSTITUTION:When a TV signal is turned into other broadcasting mode than the stereo broadcasting, 'L' signal is led to a terminal (a) of a changeover circuit 6, and the command signal S3 of 'L' is outputted from an output terminal (o). Then, when this command signal S3 is given to a gate circuit 5, it is inverted by an inverter 5a, and the command signal of 'H' S3 is given to the other input of an OR gate 5b. By this method, since an output of the gate circuit 5 is turned into a control signal of 'H', a control signal for instructing a magnetic recording signal processing circuit and mechanical servo control circuit to make a pause in the recording is outputted by a control circuit 4 upon receipt of this 'H' signal. By this method, the recording is made to pause, and hence the recording to a video tape is put under pause accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic recording/reproducing device such as a video tape recorder.
The present invention relates to a recording and reproducing apparatus that automatically records and stops the recording at -.times., in order to delete unnecessary information such as I.

(Prior Art) When recording transmitted audio signals and video signals on a recording medium such as a magnetic tape, for example, in a magnetic recording and reproducing apparatus such as a video tape recorder, recording start time and recording time, or recording start By setting the time and recording end time, the transmitted television signal is constantly recorded during the set time.

An example of this type of video tape recorder is shown in FIG.

In the figure, reference numeral 10 denotes a control section equipped with a microcomputer, which controls a lie circuit 1, a memory circuit 2, a timer circuit 3, and a control circuit 4 according to a control program.

The latch circuit 1 temporarily holds an input signal, and receives output from an operation switch for performing operations such as recording, playback, stop, and -time stop, and also receives output from a remote control. There is. Further, the output signal from the latch circuit 1 is given to the memory circuit 2, and time data from the timer circuit 3 is also led thereto.

That is, the memory circuit 2 is configured to store information corresponding to human input from the operation switch or input from the remote control. For example, by turning on the recording key of the operation switch, information to start recording is stored in the memory circuit 2, and this information to start recording is given to the control circuit 4. There is. At this time, the storage circuit 2 is capable of timer recording based on time data from the timer circuit 3.

Based on the output information from the storage circuit 2, the control circuit 4 sends a control signal for performing an operation corresponding to the information to a magnetic recording signal processing circuit, mechanical servo control circuit, etc. (not shown). ing.

When recording television signals using the video cheap recorder with the above configuration, normal recording can be performed by operating the operation switch or remote control, and the operation time can be set using the timer FI@3. , it is now possible to reserve programs and automatically record them.

However, in the television signal recorded in this way, in addition to the program to be recorded (hereinafter referred to as "necessary information"), information that is not originally necessary, such as commercials, is also recorded.

Therefore, when this is reproduced to view the necessary information, unnecessary parts are inserted between the necessary information, resulting in a very awkward reproduction state. Particularly when the recorded information is a movie or the like, if a commercial or the like suddenly appears during a lively scene, the user may lose interest.

Therefore, in the past, in order to delete this unnecessary part, two video tape recorders were prepared, and the video tape cassette on which the information was recorded was first set in the playback video tape recorder, and then the video tape recorder was put into playback mode, and at the same time the video tape recorder was recorded. Set another videotape cassette in the side videotape recorder to record, and while dubbing on both videotape recorders, set the recording side videotape recorder to pause mode for unnecessary parts, and record only the necessary parts. The following methods were adopted.

In addition, when directly recording the transmitted television signal, press the -time stop button each time during unnecessary parts such as commercials to pause recording, and then restart the -time when the commercial ends. It was necessary to press the stop button to cancel recording stop mode.

(Problem to be Solved by the Invention) However, the former method described above requires two video tape recorders, one for playback and one for recording, which increases the cost and requires manual operation. This made the operation extremely troublesome. Furthermore, in the latter method, since the transmitted television signal is directly recorded, there is a problem in that if the - time stop button is operated incorrectly, necessary information may be cut off.

The present invention has been made in view of the above circumstances, and its purpose is to automatically record and temporarily stop recording by determining the audio mode and obtaining a command signal when recording a television signal, etc. An object of the present invention is to provide a magnetic recording/reproducing device.

(Means for Solving the Problems) In order to solve the problem described in item 1, the magnetic recording and reproducing device of the present invention is capable of recording and reproducing audio and video signals including audio multiplexed signals such as stereo broadcasting and dual language broadcasting. an audio multiplexing decoder that determines and separates the audio mode when receiving the audio signal and video signal and outputs a mode discrimination signal, and a specific mode discrimination signal output from the audio multiplexing decoder. and a switching circuit that outputs a command signal, and when the output level of the command signal matches the output level of the audio mode included in the audio signal, records the audio signal and video signal at that time on a recording medium. The configuration includes a control section that outputs a control signal to cause the recording medium to pause or stop recording on the recording medium when they do not match.

(Function) With the above configuration, when recording an audio signal and a video signal, the type of audio multiplexed signal included in the audio signal is determined, and a specific mode determination signal is output based on the determination result. When this mode discrimination signal is applied to the switching circuit, a command signal responsive to the mode discrimination signal is output.

The control unit Lj receiving this command signal causes the audio signal and video signal at that time to be recorded on the recording medium only when the output level of the audio mode included in the audio signal matches the output level of the command signal. Outputs a control signal.

Further, when the output level of the audio mode and the output level of the command signal do not match, a control signal is output to temporarily stop or stop recording. When the output level of the audio mode and the output level of the command signal match again, a control signal is output to cancel the -time stop and continue recording.

By automatically performing such operations, it becomes possible to record only the necessary information included in the television signal.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the electrical configuration of the magnetic recording/reproducing apparatus of the present invention.

In the figure, 2 is a latch circuit, 2 is a memory circuit, 3 is a timer circuit, and 4 is a control circuit, and these structures are similar to those of the conventional example shown in FIG. The magnetic recording/reproducing apparatus of the present invention is constructed by inserting a gate circuit 5 between the storage circuit 2 and the control circuit 4 having the above configuration, and adding a switching circuit 6 and an audio multiplex decoder 7 to this.

The audio multiplex decoder 7 distinguishes and separates the television signal, and when the television signal is a stereo broadcast, it determines that it is a stereo broadcast and separates the audio signal into the L (left) channel and the R (right) channel. When broadcasting in two languages, the system separates the audio signal into main audio and sub audio, and distinguishes that it is a dual language broadcast.
When monaural broadcasting is performed, it is determined that it is monaural broadcasting, and each mode determination signal S2
is applied to the switching circuit 6.

The switching circuit 6 specifies the audio mode during recording of the television signal based on the mode discrimination signal S2, and uses a mode control signal Sl from a mode controller (not shown).
Terminals a - d and the output terminal O shown in FIG.
is applied to the gate circuit 5.

FIG. 2 shows a more specific configuration of the switching circuit 6 and the gate circuit 5, and the switching circuit 6 will be specifically explained with reference to the same figure.

The switching circuit 6 includes a switching element 6a and a NOR gate 6.
terminals a and b of the switching element 6a.
The output of the audio multiplex decoder 7 is connected to. The rH level is introduced into the terminal a when receiving stereo broadcasting, and the "L" level is introduced when receiving other broadcast modes. In addition, the "H" level is introduced to the terminal when receiving a dual-language Japanese broadcast, and the rLJ level is introduced when receiving other broadcast modes.Furthermore, the terminal C is configured so that each input terminal is A NOR game 1 connected to each output of the audio multiplex decoder 7 (i.e., the output when receiving a stereo broadcast and the output when receiving a dual language broadcast)
-6b output. In other words, at terminal C,
When receiving monaural broadcasting when the outputs of the audio multiplex decoder 7 supplied to terminals a and terminal A are both at the "L" level, "
"H" level has been introduced. Note that the terminal d is connected to a potential at the river J'' level, and this rHJ level is introduced when the voice mode is not specified. On the other hand, output terminal 0 is connected to inverter 5a of gate circuit 5.

Furthermore, the switching circuit 6 is capable of specifying the audio mode during recording using the mote control signal S1, and when any of the terminals a to d specified by the mode control signal S1 is connected to the output terminal O. , the output of the rH" level or "L" level appearing at the terminals a to d is sent to the command signal S.
3, it is applied to the gate circuit 5.

Note that this mode control signal SL is a signal output based on various audio modes when receiving a television signal, and is sent out by operating an operation switch or remote control. This mode control signal S1 may be outputted arbitrarily by providing a dedicated switch, or may be obtained by configuring software by the microcomputer of the control section 10.

The gate circuit 5 gates the output signal S4 for temporary stop when recording a television signal, and includes an inverter 5a and an ○R gate 5b. And OR Age-5
It is designed to be applied to the other input of b. A temporary stop output signal S4 output from the memory circuit 2 is introduced into one input of the OR gate 5b, and a temporary stop output signal S4 is output in response to a command signal S3 from the switching circuit 6. gated, and its output signal is given to the control circuit 4 as a control signal S5.

In response to the control signal S5 from the gate circuit 5, the control circuit 4 controls the operations of the magnetic recording signal processing circuit, the mechanical servo control circuit, etc., and controls the operation of temporarily stopping recording and re-recording. It has become.

Next, the operation of the magnetic recording/reproducing apparatus having the above configuration will be explained.

When recording a television signal on a videotape, when an operator operates an operation switch or a remote control to select, for example, stereo broadcast mode, the mode control signal SL output at that time is applied to the switching circuit 6. , terminal a and terminal 〇 are connected. At this time, if the mode discrimination signal s2 given from the audio multiplex decoder 7 to the switching circuit 6 is a stereo broadcast discrimination signal, the terminal a becomes the "I4" level, so the output terminal 0 outputs rH"1.
A level signal is output. And this rH.

When the level command signal S3 is given to the gate circuit 5,
By being inverted by the inverter 5a, "L"
A level signal is sent to the OR circuit 5b.

At this time, if the output signal S4 of the rLJ level that does not temporarily stop the recording of the television signal is provided from the memory circuit 2 to the OR circuit 5b, the output signal is an "L" level signal that causes the recording to continue. Therefore, during recording of stereo broadcasting, recording will continue unless a pause operation is performed using the operation switch or remote control. On the other hand, when the television signal is in a broadcasting mode other than stereo broadcasting, the "L" level is introduced to the terminal a of the switching circuit 6, and the output terminal 0
A command signal s3 at the "L" level is output from the "L" level command signal s3. Then, when this command signal S3 is given to the gate circuit 5,
Inverted by the inverter 5a, OR age-5b
The command signal S3 at rl (J level is given to the other input of As a result, a control signal instructing the magnetic recording signal processing circuit and the mechanical/servo control circuit to temporarily stop recording is output.

This causes recording to be temporarily stopped (pause state), and recording to the videotape is temporarily stopped.

Then, when the stereo broadcast starts again, the OR
The signal given to the human power connected to circuit 5a of circuit 5b becomes "L" level again (that is, the command signal S3 becomes rHJ level), and the output of OR gate 5b becomes "L" level again. , -, the stop is canceled and recording of the stereo broadcast is started.

As a result, on the videotape, the audio signal and video signal that is the stereo broadcast immediately before unnecessary information such as a CM is received, and the audio signal and video signal that is the stereo broadcast immediately after the reception of unnecessary information is finished. can be recorded continuously, and only necessary information can be recorded during stereo broadcasting.

Incidentally, the operation is basically the same when receiving other broadcast modes, for example, when recording a bilingual Japanese broadcast, the terminal of the switching circuit 6 is connected to the output terminal 0 based on the mode control signal S1.

At this time, the terminal is rH.

Since the level mode discrimination signal S2 is given, the "H" level command signal S3 is outputted from the output terminal 0 of the switching circuit 6, and rl- and level signals are outputted otherwise. Therefore, the control signal S5 at the "I5" level is output from the gate circuit 5 only during the reception of the dual language broadcast, and the video signal and audio signal at the time of the reception of the dual language broadcast, with unnecessary parts deleted, are recorded on the video tape. are recorded.

Furthermore, when recording monaural broadcasting, the mode control signal S1
Terminal C of switching circuit 6 is connected to output terminal 0 based on . Since this is not a stereo broadcast or a dual-language broadcast, the mode discrimination signal S2 at the "L" level is introduced into both of the NOR gates 6b. Therefore, since the NOR gate 1-6b outputs a signal at rH level, the command signal S3 at r)(J level is output from the output terminal 0. Therefore, the OR gate 5b of the gate circuit 5 receives The "L" level signal from the storage circuit 2 and the "I-" level signal inverted by the inverter 5a are input, and the output is "L".
” level signal appears. Furthermore, when broadcasting is not monaural, the NOR gate 6b outputs a signal at the "L" level, so the command signal S3 at the "L" level is output from the output terminal 0. Therefore, the OR gate 5b of the gate circuit 5 receives the rl-J level signal from the memory circuit 2 and the rHJ level signal inverted by the inpark 5a, and its output has a
A signal of "H" level appears. That is, the recording operation is performed during monaural broadcasting, and the recording operation is stopped during non-monaural broadcasting.

By the way, based on the mode control signal S1, the switching circuit 6
When the terminal d of the switch circuit 6 is connected to the output terminal 0, a state unrelated to the audio mode of television broadcasting is established, and the command signal S3 of rH level is always output from the output terminal d of the switching circuit 6. becomes.

Therefore, the control signal S5 at the "L" level is always outputted from the gate circuit 5, and the control to temporarily stop recording is not performed, and the video signal and the audio signal are continuously recorded.

Furthermore, when the operator selects the normal playback mode, the terminal d and the output terminal O are connected based on the mode control signal S1, and operation control such as - hour stop is not performed. do not have.

In the above embodiment, the present invention is applied to a video tape recorder, but it is also applicable to Hi-Fi audio that can receive audio multiplex broadcasts.

Further, in the above embodiment, in order to delete unnecessary portions such as commercials, the gate circuit 5 is configured to output the control signal S5 instructing the temporary stop mode, but the control signal S5 instructing the stop mode is It is possible to configure it to output .

Furthermore, by interlocking the timer circuit 3 and the memory circuit 2 and controlling the gate circuit 5, the timer circuit 3
It is also possible to perform switching control to temporarily stop or stop the recording of television signals according to the time set by .

Furthermore, the switching circuit 6 and the gate circuit 5
It is also possible to have a configuration built in a microcomputer.

(Effects of the Invention) The magnetic recording/reproducing device of the present invention, when recording an audio signal and a video signal including an audio multiplex signal, determines the audio mode of the audio signal and uses a specific mode discrimination signal corresponding to the audio mode. output a command signal based on the command signal, and automatically control the pause or stop of the recording operation of the audio signal and video signal at the time of reception depending on whether the output level of this command signal matches the output level of the audio mode. Therefore, when recording television signals etc. on videotape, unnecessary parts such as commercials are automatically deleted and only necessary information is recorded, whether in stereo broadcasting or dual language broadcasting. This has the effect of being able to record continuously.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a block diagram showing the electrical configuration of a magnetic recording/reproducing device, and FIG. 2 is a block diagram showing the electrical configuration of the device, and FIG. A circuit diagram showing a more specific configuration, and FIG. 3 is a block diagram showing an electrical configuration of a conventional example. 1... Latch circuit 4... Control circuit 6... Switching circuit 7... Audio multiplex decoder 10... Control section 2... Memory circuit 5... Gate circuit

Claims (1)

[Claims] 1) In a magnetic recording and reproducing device capable of recording and reproducing audio signals and video signals including audio multiplexed signals such as stereo broadcasting and bilingual broadcasting, when receiving the audio signals and video signals, an audio multiplex decoder that discriminates and separates audio modes and outputs a mode discrimination signal; a switching circuit that outputs a command signal based on a specific mode determination signal output from the audio multiplex decoder; and an output of the command signal. When the level matches the output level of the audio mode included in the audio signal, a control signal is output that causes the recording medium to record the audio signal and video signal at that time, and when they do not match, the output level is output to the recording medium. 1. A magnetic recording and reproducing apparatus comprising: a control section that outputs a control signal to temporarily stop or stop recording.