JP2702040B2 - 8mm VCR audio editing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an 8 mm VCR audio editing apparatus.

[0002]

2. Description of the Related Art Currently, the mainstream of home VCRs is 1 /
The 2-inch VCR was able to perform audio editing because it had a separate audio track on the tape.
However, in the case of 8 mm, there is no separate audio track, and the audio signal is FM-modulated together with the video signal, and the main recording area excluding the sub-recording area (the part where the video signal, FM audio signal and tracking pilot signal are recorded) Audio editing could not be performed because it was recorded on However, audio editing could be performed by adding a PCM (Pulse Code Modulation) function and using the sub recording area.

However, when the PCM function is applied, the price increases, so that the PCM function is not applied except for some high-end models. Therefore, there is a problem that audio editing cannot be performed in a low-cost model having no PCM function, which occupies most of the 8 mm VCR.

[0004]

Accordingly, a first object of the present invention is to use two sub-recording areas by additionally installing two fixed heads horizontally in a sub-recording area not used in an 8 mm VCR having no PCM function. By doing so, audio editing is possible. Another purpose is to install two fixed heads horizontally in the sub-recording area.
After a number of tracks are secured, one track is used for audio and the other is used for caption and audio to perform a caption function.

[0005]

[Summary of the present invention for achieving the above objects comprises a first head which records and reproduce a <br/> caption data according to the linear audio signal and character, the linear Record audio signal in sub recording area and
A second head for reproducing, and a power supplied from the first head.
Recorded by the linear audio signal and the rotating head
For switching between the input FM audio signal
Control for recording and reproducing the control signal in the sub-recording area.
And Ruheddo, the caption data processing means for processing the caption data reproduced by said first head, the tail is recorded by the first and second head
FM audio amplifier for amplifying audio signals;
Audio signal reproduced by first and second heads
And an audio signal processing means for processing the audio signal amplified by the FM audio amplifier, and selecting means for connecting to the caption data processing unit or selectively the said audio signal processing means the first head, before
Serial FM audio amplifier and said audio signal processing means
A switching means for selectively connecting the door, the first
When recording the caption data with a head
Is the control recorded by the control head.
A roll signal for selecting the FM audio signal;
Level and the audio signal is transmitted by the first head.
When recording numbers, the control head
The control signal to be recorded is reproduced by the first head.
To a second level to select the generated audio signal,
The control reproduced by the control head
When the control signal is at the first level,
The first head is the caption data processing means.
And connected to the switch.
Means for communicating with the FM audio amplifier and the audio signal.
Signal processing means to be connected, and
The control signal reproduced by the control head.
When the signal is at the second level,
A first head connected to the audio signal processing means;
So that the switching means is
FM audio amplifier and audio signal processing means
And a microprocessor for controlling such bets is cut
It is characterized by having .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing a pattern of an inclined track of a tape on which a signal is recorded by a general 8 mm VCR. As can be seen in FIG. 1, 0 mm on both sides of the 8 mm tape 100.
6 mm fixed head tracks 101a and 101b are formed. Inside the fixed head tracks 101a, 101b
Guard bands 102a and 102b of 0.1 [mm] are formed.
A recording area 103 serving as a main recording area and a sub recording area is formed inside the guard bands 102a and 102b. In the main recording area of the recording area 103, a video signal, an FM audio signal, and a tracking pilot are recorded. In the recording area 103 , when the tape 100 moves in the X-axis , the head (not shown) moves
About an axis (180 ° + 36 °) inclined obliquely track portion by rotation is formed.

Accordingly, audio editing may be performed by recording a PCM audio signal in a sub-recording area for recording an 8 mm VCR signal having a PCM function and a tracking pilot signal. However, currently most 8mm VC
R is a popular type without PCM function. An 8 mm VCR without a PCM function could not perform audio editing because the sub recording area could not be used on the tape 100.

According to the present invention, two fixed heads are installed in the sub-recording area to secure two channels so that an audio signal can be recorded and reproduced, thereby performing not only audio editing but also a caption function. It is something that can be done. FIG. 2 shows an 8 mm according to the invention.
FIG. 2 is a block diagram of an audio editing device of the VCR. In FIG.
Reference numeral 200 denotes a first and second heads 201 and 202 for recording and reproducing a linear audio signal or a linear audio signal and caption data in the sub recording area of FIG. 1 in two channels, and recording or reproducing a control signal on a fixed head track 101b. This is a fixed head composed of a control head 203 that performs control.

The first head 201 of the fixed head 200 is a caption / audio combined head capable of recording and reproducing caption data and audio signals.
Reference numeral 210 denotes caption data processing means for processing caption data reproduced from the first head 201.
Reference numeral 220 denotes audio signal processing means for processing audio signals output from the fixed head 200 and the existing FM audio amplifier 241. The FM audio amplifier 241
Is an amplifier for processing an FM audio signal reproduced in the main recording area. 230 is a selection means for selecting the caption data processing means 210 or the audio signal processing means 220 and connecting it to the first head 201 of the fixed head 200.

The first head is selected by the selection means 230.
In step 201, the caption data is recorded and reproduced, or the audio signal is recorded and reproduced. 240
Is switching means for controlling the connection between the FM audio amplifier 241 and the audio signal processing means 220. By the switching means of the switching means 240, the audio signal processing means 220 processes the FM audio signal output from the FM audio amplifier 241 or processes the audio signal recorded or reproduced by the fixed head 200. .

Reference numeral 250 denotes a selection means 230 and a switching means 24
0 and the character signal based on the caption data processed by the caption data processing means 210 is transmitted to the OSD means 251.
, And processes a control signal recorded or reproduced by the control head 203. The microprocessor 250 has a first head when recording.
When recording caption data using
Is the control to be recorded by the control head 203.
Level to select the FM audio signal.
High level, and the first head
When recording numbers, the control head 203
The control signal to be recorded is reproduced by the first head 201.
Level at which the selected audio signal is selected.
Level, and during playback, the control head 203
When the reproduced control signal is high level,
The selection means 230 is used by the first head 201 for the caption data.
While controlling so as to be connected to the processing means 210,
Switching the switching means 240 to the FM audio amplifier 241
Control to be connected to the audio signal processing means 220,
Also, the control reproduced by the control head 203
When the roll signal is at the second level, the selection means 230
First head 201 connected to audio signal processing means 220
And the switching means 240
FM audio amplifier 241 and audio signal processing means
220 is cut off. When reproducing the FM audio signal which is a basic function of the 8 mm VCR, the microprocessor 250 outputs the control signal S2 to turn on the switching means 240.

At this time, the FM audio amplifier 241 outputs an FM audio signal in the main recording area of the 8 mm tape 100 on which the video signal, the FM audio signal, and the tracking pilot signal are recorded. FM audio amplifier
The FM audio signal output at 241 is input to the audio signal processing means 220 through the switching means 240. The audio signal processing means 220 processes the input FM audio signal and outputs it through an output means such as a speaker. Therefore, the user can view the video and the FM audio.

On the other hand, if the sub-recording area in the recording area 103 in FIG. 1 is used for two-channel audio signals,
The microprocessor 250 outputs the control signals S1 and S2 to record the connection between the common terminal C and the selection terminal NC of the selection means 230, and to turn off the switching means 240 so that the audio signal processing means 220 and the FM audio amplifier 241 It will break the connection.

When the common terminal C of the selection means 230 and the selection terminal NC are connected and the switching means 240 is turned off, the linear audio signals recorded on the two channels of the sub-recording area are transmitted to the first and second terminals of the fixed head 200. Head 201, 20
2 and applied to the audio signal processing means 220. The audio signal processing means 220 processes and outputs the audio signals reproduced by the first and second heads 201 and 202.

As described above, when two heads 201 and 202 are used, stereo is possible, and two heads 201 and 202 secured in the sub recording area are used.
If one channel is recorded in English and the other channel is recorded in Japanese, the user can select and listen to a desired language. When one channel of the sub-recording area shown in FIG. 1 is used for caption and another channel is used for audio signal, the microprocessor 250 outputs a control signal S1 and outputs the control signal S1. The terminal C is connected to the selection terminal NO .

The common terminal C of the selection means 230 and the selection terminal NO
Is connected, the data is recorded on one of the two channels of the sub recording area, and the first head 201 of the fixed head 200 is
Is applied to the caption data processing means 210. The caption data processing means 210 processes the reproduced signal and applies caption data to the microprocessor 250. The microprocessor 250 is provided for the caption data processing means 21.
A character signal according to the caption data processed in step 0 is applied to the OSD means 251 to generate caption subtitles. At this time, the microprocessor 250 outputs the control signal S2 to turn on or off the switching means 240.

The switching means is controlled by a control signal S2.
When 240 is turned on, the output of FM audio amplifier 241
Signal, and a linear audio signal reproduced by the second head 202 of the fixed head 200 is applied to an audio signal processing unit 220. Therefore, the audio signal processing means 220 outputs the FM audio signal recorded in the main recording area supplied from the FM audio amplifier 241 and the selection.
The second head 202 of the fixed head 200 via the selection means 230
You output by processing the linear audio signal that had been recorded in et supplied sub recording area.

Here, the control signals S1 and S2 may be read from the control head 203 and output by the microprocessor 250 according to the control signal S3. That is, when recording a video signal and an audio signal on the tape, if the user arbitrarily records the control signal S3 on the track for the fixed head of the tape, the control signal S3 is read by the control head 203 during reproduction, The read control signal S3 is applied to the microprocessor 250.
When the control signal S3 is applied to the microprocessor 250, the microprocessor 250 outputs the control signals S1 and S2 according to the control signal S3 to control the selection means 230 and the switching means 240.

At this time, the control signal S3 to be recorded in advance depends on the order in which the user wants to edit, or automatically edits a desired portion and records arbitrarily according to the order in which the user wants to listen. Here, the linear audio signal is recorded at a deeper frequency at a lower frequency than the PCM signal, and since the recording angle is different, even if the linear audio signal is recorded in the sub-recording area of the 8 mm tape where the PCM signal is recorded, the linear audio signal is The crosstalk phenomenon between audio signals does not occur.

FIG. 3 is a schematic view showing an installation state of the fixed head 200 shown in FIG. In FIG. 3, on both sides of the rotating head drum 300, a tape 100 is attached to the rotating head drum 300.
The guide posts 301a and 301b for bringing the two into close contact are provided. The guide posts 301a, fixed head 200 according to the present invention is to 301b in the guide post 301b on the right side (in the drawing) are installed perpendicular to the tape 100. At this time, fixed head
The first and second heads 201 and 202 of the tape 200 are installed horizontally in the sub-recording area of the tape 100, and the control head 203
Is set horizontally on the fixed head track.

At this time, the first and second heads of the fixed head 200
Reference numerals 201 and 202 are installed horizontally in the sub recording area of the tape 100, and the control head 203 is installed horizontally on the fixed head track. Figure 4 is a timing diagram illustrating the signal states of the main part in FIG. Figure 4
(A) is an example diagram of the control signal S3 in FIG. 2, automatically without switching to the order or wishes portion the user wants to edit, Figure 4 by the order to Listen
Comprising a control signal such as an exemplary diagram illustrated in (A) a video signal and an audio signal or the like to record when recording on the tape. The control signal S3 recorded on the tape is read by the control head 203, and the control signal S3 read by the control head 203 is applied to the microprocessor 250.

When the control signal S3 applied to the microprocessor 250 is at a high level, the microprocessor 25
0 outputs the control signal S2 to turn on the switching means 240. When the control signal S3 applied to the microprocessor 250 is at a low level, the microprocessor 250 outputs a control signal S2 to switch the switching means.
240 is turned off.

[0023] FIG. 4 (B) is an example diagram of a FM audio signal reproduced by the main recording area where the video signal and the FM audio signal and the pilot signal is recorded. FIG. 4 ( C)
FIG. 4 is an example diagram of an audio signal edited and recorded in a sub recording area, in which an audio signal is recorded in a sub recording area .
The Rutoki records the control signal S3 as shown in FIG. 4 (A) at a high level.

[0024] During reproduction, controls signal S3 by Tsu <br/> the control head 203 is reproduced, the reproduced con
The troll signal S3 is recognized by the microprocessor 250
Is done. The reproduced control signal S3 is low level
, The microprocessor 250 responds to the control signal S2 .
The switching means 240 is turned off. When the switching means 240 is turned off, the linear audio signal edited and recorded in the sub recording area is applied to the audio signal processing means 220 and processed.

FIG. 4 (D) is an audio signal processing unit 220
FIG. 3 is an example of an audio signal that is processed and finally output. Further, when the control signal S3 that will be shown in FIG. 4 (A) is at a high level, the audio signal processing means FM audio signal switching means 240 is turned on is recorded in the main recording area from an FM audio amplifier 241 220 to be applied, and the control signal S3 is switching means 240 when is low Les <br/> bell off, FM
Audio amplifier 241 to audio signal processing means 220
Output of the FM audio signal is cut off.

Thus , according to the control signal S3 ,
A linear audio signal edited as Ru shown in FIG. 4 (D) Te you output the final basis. FIG. 5 shows an example of a caption data format. Caption data is recorded using five bits between start data indicating a start fulcrum and end data indicating an end fulcrum. 32 kinds of character by the data (including special characters) that displays the.

That is, alphabets A to Z and ""
? !・ Special characters such as and spaces are displayed. Such caption data is recorded on one channel of the sub recording area, and a linear audio signal is recorded on another channel. in this way,
According to the present invention, an audio editing function can be performed with a simple hardware configuration in which only a fixed head is installed in an 8 mm VCR, and a caption function, audio multiplexing, and a hi-fi stereo function can be provided. The 8 mm tape is a metal tape. Therefore, sound quality with good high frequency characteristics can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a pattern of an inclined track on which a signal is recorded on a general 8 mm VCR tape.

FIG. 2 is a block diagram of an 8 mm VCR audio editing device according to the present invention.

FIG. 3 is a schematic diagram showing an installation state of a fixed head in FIG. 2;

FIG. 4 is a timing chart showing signal states of main parts in FIG. 2;

FIG. 5 is a waveform diagram showing an example of a caption data format.

[Explanation of symbols]

 100 Tape 101a, 101b Fixed head track 102a, 102b Guard band 103 Recording area 200 Fixed head 201, 202 head 203 Control head 210 Caption data processing means 220 Audio signal processing means 230 Selection means 250 Microprocessor 251 OSD means 300 Rotating head drum 301a, 301b Guide post

Claims (1)

(57) [Claims] 1. A a first head to record and reproduce the key <br/> catcher description data according to the linear audio signal and character, to record and reproduce the linear audio signal to the sub recording area
A second head, and the linear audio supplied from the first head.
Said FM audio recorded by a signal and a rotating head
Control signal for switching between the signal and the sub-recording area.
A control head for recording and reproducing on said the caption data processing means for processing the caption data reproduced by the first head, the Eau recorded by said first and second head
FM audio amplifier for amplifying an audio signal, and audio reproduced by the first and second heads
And audio signal processing means for processing the signals and Eau <br/> I o signal the amplified by the FM audio amplifier, connected to the caption data processing unit or selectively the said audio signal processing means the first head recording and selection means, switching means for selectively connecting said audio signal processing means and said FM audio amplifier, the caption data by the first head
When recording, record by the control head
Select the FM audio signal as the control signal
The first level, and the first head
When recording audio signals,
The control signal to be recorded by the first
A second level for selecting the audio signal reproduced by the head
Before being played by the control head
When the control signal is at the first level,
The first head operates the caption data.
Control to be connected to the
Switching means is connected to the FM audio amplifier and the audio
Audio signal processing means so that they are connected.
The control head reproduced by the control head.
When the troll signal is at the second level,
Means said first head and the audio signal processing means
And connected to the switch.
Means for communicating with the FM audio amplifier and the audio signal.
Audio editing apparatus 8mmVCR characterized by having a microprocessor and No. processing means is controlled to be disconnected.