JPH04332966A - Recorder/reproducer - Google Patents

Abstract

PURPOSE:To record paired still picture information and voice information in a state that one of them can be selectively after-recorded in recorder/reproducer. CONSTITUTION:For example, a plurality of screens of pieces of static picture information v1, v2,... are first discretely recorded on a magnetic tape 12 by a recording operation of picture recording means, and partition retrieving subinformation (b) is recorded on a subinformation recording area of the tape by a recording operation of subinformation recording means to be conducted in parallel with the previous recording. Then, pieces of voice information a1, a2,..., corresponding to the information v1, v2,... are discretely recorded on the tape 12 with the recorded subinformation (b) as an index by voice recording means having different time series of the recording operation from that of the picture recording means. Thus, the information v1, v2,... of one screen and the voice information a1, a2,... corresponding thereto are recorded in two parts divided longitudinally in the partitions R1, R2,... of the tape 12. The order of the recording operations of the picture recording means and the voice recording means may be reversely set.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention is a digital audio tape recorder capable of recording multiple series of signals in a composite manner and reproducing the recorded signals for each series.
Audio Tape recorder; hereinafter referred to as DA
(abbreviated as T) and other recording/reproducing devices.

0002

2. Description of the Related Art A conventional recording/reproducing device converts an audio signal into a digital signal and records it on a magnetic tape, and also converts the digital signal recorded on the magnetic tape into an audio signal and plays it back. DAT is well known.

In the case of this DAT, when converting an audio signal into a digital signal and recording it on a magnetic tape, information for error correction such as parity can be simultaneously recorded as sub information, so that one part of the recorded information can be recorded simultaneously. Even if a portion is missing, it can be repaired, making it possible not only to faithfully reproduce the original sound, but also to reproduce audio with extremely low noise.

By the way, some of the above-mentioned conventional DATs operate in a 2-channel mode in which two channels are set on a magnetic tape in which two types of audio signals are individually recorded, and in a two-channel mode in which two types of audio signals are recorded individually. There is also a 4-channel mode in which four channels are individually recorded on a magnetic tape.

[0005] In the 2-channel mode, two types of audio signals corresponding to the two speakers placed on the front left and front right sides of the listener are recorded on magnetic tape, and in the 4-channel mode, the listener On the other hand, four types of audio signals corresponding to four speakers arranged on the front left side, front right side, rear left side, and rear right side are recorded.

Furthermore, in the case of the above-mentioned 4-channel mode, audio signals are recorded on two of the channels, and still image video signals are recorded on the remaining two channels, so that audio signals and video signals can be recorded from one magnetic tape. Systems that allow simultaneous playback have also been known.

In this method, for example, two image memories each storing one screen worth of still image video signals are prepared, and at the time of recording, one screen worth of video signals is digitally stored before being recorded on a magnetic tape. It is converted into a digital signal by an analog (hereinafter referred to as D/A) conversion circuit, and is then sequentially written to one of the two image memories over a certain period of time (hereinafter referred to as the first time). time, and then a certain period of time that is sufficiently longer than the first time (hereinafter referred to as the second time)
One screen worth of digital video signals is read out from the image memory and recorded on two channels of magnetic tape.

At this time, the audio signal input in parallel with the video signal is also converted into a digital signal by another D/A conversion circuit and recorded on the remaining two channels of the magnetic tape. Therefore, a video signal for one screen and an audio signal such as a narration corresponding to this screen are simultaneously recorded on the magnetic tape in parallel.

FIG. 9 is a diagram showing the recording format of video signals and audio signals on the magnetic tape in this case.

On the other hand, during playback, the digital video signal for one screen read from the magnetic tape is once sequentially written into one of the above-mentioned image memories over a second period of time, and after the writing is completed, the digital video signal is read from the magnetic tape. 1 over the first time from the image memory
A video signal corresponding to a screen is read out, and the read out video signal is converted into an original analog video signal by a digital-to-analog (hereinafter referred to as D/A) conversion circuit and reproduced.

At this time, the digital audio signal read out from the magnetic tape in parallel with the digital video signal is also converted into an analog audio signal by the D/A conversion circuit and reproduced. As a result, when a still image video signal for one screen is reproduced, an audio signal such as a narration corresponding to the still image is reproduced in parallel.

0012

[Problems to be Solved by the Invention] However, in a system that simultaneously records video and audio signals, such as the conventional DAT described above, it is difficult to re-record only a portion of the video signal, or to re-record part of the audio signal. It is not possible to perform after-recording (hereinafter also referred to as dubbing), which involves re-recording only the original part.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a recording and reproducing apparatus capable of recording a pair of video signal and audio signal in a state in which only one of them can be selectively post-recorded.

[0014]

[Means for Solving the Problems] The present invention sequentially records information in a main information recording area of a magnetic tape, forming one section of information as a pair of still image information and audio information corresponding thereto. In a recording and reproducing apparatus that reproduces still image information and audio information in parallel, an image recording means records only the still image information of each section discontinuously on a magnetic tape in association with each section, and the image recording means an audio recording means for discontinuously recording only the audio information of each section in association with each section on a magnetic tape under a time series different from that of the image recording means and the audio recording means; Parallel to the recording operation of the recording means that records on the magnetic tape first, sub information for partition search is recorded in the sub information recording area of the magnetic tape, which serves as an index for the recording means that records on the magnetic tape later to search for the recording position. This is a recording/reproducing apparatus characterized by comprising a sub-information recording means.

[0015]

[Operation] According to the present invention, for example, by the recording operation by the image recording means, still image information for a plurality of screens is first recorded discontinuously on the magnetic tape, that is, one screen is recorded in a predetermined area of each section that is sequentially set on the magnetic tape. By the recording operation of the sub-information recording means in parallel with this, sub-information for partition search is recorded in the sub-information recording area of the magnetic tape.

Next, by the recording operation by the audio recording means, the audio information corresponding to each of the still image information is discontinuously recorded on the magnetic tape using the section search sub-information recorded in the sub-information recording area of the magnetic tape as an index. In other words, each section of the magnetic tape is recorded in correspondence with the non-recording area, and as a result, each section of the magnetic tape has one screen worth of still image information and the corresponding audio information, dividing the area into two. recorded before and after. Even if the recording operation by the audio recording means is performed first and the recording operation by the image recording means is performed later, recording is performed in the same manner.

As a result, for example, any one of the magnetic tapes
It is possible to post-record new still image information in an area where a screen's worth of still image information is recorded, or to post-record new audio information in an area where arbitrary audio information is recorded.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing a schematic configuration of a recording/reproducing apparatus which is an embodiment of the present invention. This recording and reproducing device is a DAT that can set a 2-channel mode as an operating state, and the 2 channels are 2 channels as described later.
It can be switched between being used for recording and reproducing various types of audio signals and for recording and reproducing still image video signals.

The input terminal TR is a terminal for inputting one type of audio signal, and the audio signal in this case is, for example, an audio signal to be output from a speaker placed in front of the listener on the right side. be. Another input terminal TL is
This is a terminal for inputting another type of audio signal, and the audio signal in this case is, for example, an audio signal to be output from a speaker placed on the front left side with respect to the listener.

[0020] Yet another input terminal TV is a terminal for inputting a still image video signal. These input terminals TR
, TL, and TV are the corresponding A/D conversion circuits 1,
2 and 6.

[0021] The A/D conversion circuits 1 and 2 have a function of converting the audio signals inputted from the corresponding input terminals TR and TL into, for example, 16-bit digital audio signals D1 and D2, and outputting them as serial signals. have In this embodiment, the sampling frequency of A/D conversion circuits 1 and 2 is 48K.
It is assumed to be Hz.

The output terminals of the A/D conversion circuits 1 and 2 are connected to the input terminals 51 and 5 of the changeover switch 5 via lines 3 and 4.
2 are connected to each other.

The A/D conversion circuit 6 has a corresponding input terminal T.
It has a function of converting the video signal input from V into, for example, an 8-bit digital video signal D3 and outputting it to the data bus 7 as a parallel signal. In this embodiment, the sampling frequency of the A/D conversion circuit 6 is 14.3 MHz.

An image memory 8a is connected to the data bus 7. This image memory 8a is a memory for taking in one screen worth of digital video signal D3 outputted from the A/D conversion circuit 6 via the data bus 7 and storing it.

A parallel-to-serial (hereinafter referred to as P/S) conversion circuit 9 is separately connected to the data bus 7. This P/S conversion circuit 9 has a function of taking in an 8-bit digital video signal read from the image memory 8a via the data bus 7, converting it from a parallel signal to a serial signal, and outputting the signal. The output terminal of this P/S conversion circuit 9 is connected to the input terminal 53 of the changeover switch 5.

The changeover switch 5 has input terminals 51 to 51.
It has a function of selectively supplying the digital signal derived from the output terminal 53 to an output terminal 54, and the output terminal 54 is connected to the recording signal processing section 11 at the next stage via a line 10.

In this embodiment, the recording operation is divided into an audio recording operation for recording an audio signal and an image recording operation for recording a video signal.
The output terminal 54 of is switched and connected between the input terminals 51 and 52. That is, during audio recording, the digital audio signal D1 output from the A/D conversion circuit 1 and the digital audio signal output from the A/D conversion circuit 2 are processed as signals assigned to each of the two channels by the recording signal processing unit. 11
be taken into account.

On the other hand, in the image recording operation, the output terminal 54 of the changeover switch 5 is kept connected to the input terminal 53. In other words, when recording an image, the A/D
The digital video signal output from the conversion circuit 6 is taken into the recording signal processing section 11 as a signal for two channels.

The recording signal processing section 11 has a modulation function for modulating the input digital signal, a sub information addition function for adding error correction information and other sub information to the input digital signal, etc. This recording signal processing section 11
The processed signals are recorded on the magnetic tape 12 by a rotating magnetic head (not shown) or the like. The sub-information in this case includes a section search sub-code b, which will be described later. This subcode b is recorded in the subcode recording area of the magnetic tape 12 in parallel with the recording operation that is performed first among the image recording operation and the audio recording operation.

The reproduced signal processing section 13 has a demodulation function for demodulating the signal read from the magnetic tape 12 and a processing function for performing processing such as error correction from the read sub-information, and its output terminal is connected to the line 14. via changeover switch 15
is connected to the input terminal 154 of.

The changeover switch 15 has an output terminal 151
, 152, 153, and has a function of selectively supplying a digital signal derived from the reproduced signal processing section 13 to the input terminal 154 via the line 14 to each output terminal 151-153. Output terminals 151 and 152 are connected to corresponding D/A conversion circuits 16 and 17, respectively.

The D/A conversion circuits 16 and 17 have a function of converting the digital signals output to the output terminals 151 and 152 of the changeover switch 15 into analog signals. Each output terminal of the D/A conversion circuits 16 and 17 is connected to a corresponding output terminal TR1 and TL1, respectively.

Another output terminal 1 of the changeover switch 15
53 is connected to a serial-parallel (hereinafter referred to as S/P) conversion circuit 18. This S/P conversion circuit 18
has a function of converting the digital signal derived to the output terminal 153 of the changeover switch 15 into an 8-bit parallel signal and outputting the same. The output terminal of this S/P conversion circuit 18 is connected to the data bus 7.

Connected to the data bus 7 is an image memory 8b that is different from the image memory 8a mentioned above. These two image memories 8a and 8b have the function of storing digital signals output from the S/P conversion circuit 18 during playback.

The data bus 7 also has another D/A.
A conversion circuit 19 is connected. This D/A conversion circuit 1
Reference numeral 9 has a function of converting digital signals read from the image memories 8a and 8b during playback into analog signals. The output terminal of this D/A conversion circuit 19 is connected to the output terminal TV1.

FIG. 2 shows an example of the recording operation by the DAT (
3 is a flowchart showing the time of recording an image in the recording operation (hereinafter referred to as a B-mode recording operation), and FIG. 4 is a flowchart showing the time of recording an image in the recording operation, and FIG. FIG. 5 is a schematic diagram showing the recording format, and FIG. 5 is a flowchart showing the reproduction operation using the DAT. With reference to FIGS. 2 to 5,
Each recording and reproducing operation of the DAT will be described below when the B-mode recording operation in which the audio signal is recorded first is adopted.

Recording In this recording operation, an audio signal is first recorded on the magnetic tape 12 according to the flowchart of FIG. That is, following the start of the recording operation in step s1, in step s2, an audio signal corresponding to the front right speaker for the listener is input to the input terminal TR, and an audio signal corresponding to the front left speaker is input to the input terminal TL. Each is input. A still image video signal is not input at this time.

The audio signals input from the input terminals TR and TL are processed at a sampling frequency of 48K in step s3.
The signals are converted into, for example, 16-bit digital audio signals D1 and D2 by A/D conversion circuits 1 and 2 that perform sampling operations at Hz, respectively, and are output as serial signals to lines 3 and 4. The digital audio signals D1 and D2 led out to the lines 3 and 4 are input to the input terminals 51 and 52 of the changeover switch 5.
are given to each.

The digital audio signal derived from the input terminals 51 and 52 is selectively applied to the output terminal 54 of the changeover switch 5, and the digital audio signal is applied from the line 10 to the recording signal processing section 11. That is, the switching operation in the changeover switch 5 is performed in synchronization with the sampling period in the A/D conversion circuits 1 and 2.

In this case, the A/D conversion circuits 1 and 2 convert
The data amount Da of the digital audio signals D1 and D2 obtained by D conversion is as follows per 1 sec.

[0041]

[Equation 1] Da = 48 (KHz) x 16 (bits) x 2 (ch) =
1536 (K bits/sec).

In the next step s4, the recording signal processing unit 11 adds sub-information for error correction and other sub-information to each digital signal, and further performs signal processing such as modulation. administered.

The digital audio signal that has undergone signal processing is sequentially recorded on two channels set on the magnetic tape 12 in the next step s5.

At this time, as one of the side information, FIG.
), the section search subcode b mentioned above is also recorded in the subcode recording area of the magnetic tape 12 in step s6. In other words, this section search subcode b is a recording area for a still image video signal in one section R1, R2, etc. in which one screen's worth of still image video signal and the corresponding audio signal are recorded as a pair. are recorded in association with

Here, for example, the first half area V1 of one section R1 is allocated as the recording area for the still image video signal v1, and the second half area A1 is allocated as the recording area for the audio signal a1. Since the still image video signal for one screen always has a constant amount of data, the recording area V1 of the still image video signal v1 is also determined to be constant. In this recording operation, only the audio signal is recorded, so the recording area V1 of the still image video signal v1 is left unrecorded.

In the next step s7, it is checked whether the recording operation should be ended or not. If the recording operation is to be continued, the process returns to step s2 and the above operation is repeated.

If it is confirmed in step s7 that the recording operation is to be completed, the process moves to the next step s8.
At this point, the audio recording operation is completed.

In this way, the magnetic tape 12 has the image shown in FIG.
As shown in (a), audio signals a1, a2, etc., corresponding to each still image, are recorded discontinuously in the audio signal recording areas A1, A2, etc. for each section R1, R2, ..., for example, a narration. . Note that there is no limit to the data amount of each audio signal, and the audio signal recording area A1,
The sizes of A2, . . . can be arbitrarily secured.

[0049] When the recording of the audio signal is completed, next, as shown in FIG.
A still image video signal is recorded on the magnetic tape 12 according to the flowchart. That is, following the start of the recording operation in step n1, an operation is performed in step n2 to search for the recording position on the magnetic tape 12 of the still image video signal to be recorded.

[0050] In this operation, a recorded audio signal, that is, a narration is played back by a playback operation to be described later, and when the narration corresponding to the still image to be recorded is played back, the user turns on a search start switch (not shown), for example. This is done automatically by setting it to . In this search operation, the starting position of the target section, for example, section R1, is searched for using the subcode b for section search recorded in the subcode recording area in parallel with the recording of the previous audio signal as an index.

In the next step n3, one screen worth of still image video signals to be recorded are sequentially input to the input terminal TV.

The input video signal is processed in the next step n4.
The signal is sampled at a sampling frequency of 14.3 MHz by the A/D conversion circuit 6, converted into an 8-bit digital video signal D3, and provided to the data bus 7 as a parallel signal.

[0053] This digital video signal D3 is processed in step n.
5, the data is written into the image memory 8a via the data bus 7.

The data amount Dv of the digital video signal D3 for one screen of still images stored in the image memory 8a is the period of one field which is the first time, that is, 1/60 sec.
Since it is the output of the A/D conversion circuit 6 during the period of

005
5]

[Formula 2] Dv=14.3 (MHz) x 8 (bits) x 1
/60 (sec) ≒ 1.91 (M bits).

When the writing of the digital video signal D3 for one screen into the image memory 8a is completed, the stored digital video signal is transferred to the image memory 8a in step n6 for a second time which is sufficiently longer than the first time. Read from. The read digital video signal passes through the data bus 7 to P
/S conversion circuit 9, and in step n7 P/S conversion circuit 9 receives
The signal is S-converted and output as a serial signal to the input terminal 53 of the changeover switch 5.

Therefore, the time Tv required for one screen worth of digital video signals to be taken into the recording signal processing section 11
From number 1 and number 2,

[0058]

[Formula 3] Tv=1.91 (M bits)/1536 (K bits/sec) ≒1.24 (sec)
becomes.

By the way, the conventional D
In the case of AT, the sampling frequency of the audio signal is set to 32
KHz, and the number of bits to be A/D converted in one sampling was 12 bits, so the data amount D for one screen when the video signal to which the same two channels as this audio signal are allocated is read from the image memory is: per sec

00
60]

[Equation 4] D=32 (KHz) x 12 (bits) x 2 (ch) = 7
68 (bits/sec). Therefore, from Equation 2 and Equation 4, the time T required for one screen worth of digital video signals to be read from the image memory is as follows:

[0061]

[Equation 5] T=1.91 (MHz)/768 (bit/s
ec)≒2.49 (sec).

That is, compared to the conventional example, in the case of this embodiment, the time required to record the video signal onto the magnetic tape 12 is significantly shortened.

In the next step n8, the recording signal processing unit 11 adds sub-information for error correction and other sub-information to each digital signal, and further performs signal processing such as modulation. administered.

The digital video signal that has undergone signal processing is sequentially recorded on two channels set on the magnetic tape 12 in the next step n9.

As a result, the digital video signal v1 of the image corresponding to the narration, which is, for example, the recorded audio signal a1, is recorded in the unrecorded area V1 in the first half of one section R1, as shown in FIG. 4(b). . That is, the still image video signal v1 of the image and the corresponding narration audio signal a1 are recorded in pairs, dividing the recording area of the section R1 into two.

In the next step n10, it is checked whether the recording operation should be ended or not. If the recording operation is to be continued, the process returns to step n2 and the above operation is repeated.

If it is confirmed in step n10 that the recording operation is to be completed, the process moves to the next step n11, where the image recording operation is completed.

Reproduction Next, the reproduction operation of the magnetic tape 12 will be explained with reference to FIG.

In the flowchart of FIG. 5, following the start of the reproduction operation in step m1, in step m2, a recording signal is read from the magnetic tape 12 by a rotating magnetic head (not shown), and the read signal is sent to the reproduction signal processing section 13. is input.

In the next step m3, the reproduced signal processing section 13 performs demodulation and error correction processing based on the reproduced sub-information, and the digital signal subjected to such signal processing is sent from the line 14 to the changeover switch 15. Input terminal 15 of
given to 4.

The changeover switch 15 has output terminals 151,1
52, 153, a digital signal corresponding to the video signal input from the input terminal TV is derived from the output terminal 153 of the changeover switch 15, and the derived digital signal is subjected to S/P conversion in step m4. The signal is applied to the circuit 18 and is applied to the data bus 7 as a parallel signal of 8 bits each. In step m5, this digital signal is
The data is written into either one of the image memories 8a and 8b connected to the data bus 7.

In the next step m6, the image memory 8
Reading is performed from the image memory in which digital video signals for one screen of either a or 8b have been written,
The read digital video signal is sent to D via the data bus 7.
/A conversion circuit 19. This digital video signal is converted into an analog signal by the D/A conversion circuit 19 in step m7, and is output to the output terminal TV1.

On the other hand, the output terminal 15 of the changeover switch 15
1, 152, a digital signal corresponding to the audio signal input from the input terminals TR, TL is derived, and the derived digital signal is connected to the D/A in step m8.
The signals are converted into analog signals by conversion circuits 16 and 17 and output to output terminals TR1 and TL1.

Writing of digital video signals to the image memories 8a and 8b is performed to either one of the image memories, and at this time, the digital video signal written to either of the other image memories is transferred to the D/A conversion circuit. It is given to 19.

When the writing operation of the digital signal to the one image memory is completed, that is, when the writing of the digital video signal for one screen is completed, the D/A conversion circuit 1
9 is supplied with the output of the one image memory.

At this time, the other image memory contains the S/
Writing of the digital video signal from the P conversion circuit 18 is started. In this way, the outputs of the image memories 8a and 8b are alternately given to the D/A conversion circuit 19, and in this way, the display of still images that change at regular intervals can be displayed using, for example, C
This is performed using a display device such as an RT (cathode ray tube). In parallel with this, audio signals such as narrations corresponding to each still image are sequentially reproduced.

In the next step m9, it is checked whether the reproducing operation should be ended or not. If it is confirmed that the reproducing operation is to be continued, the process returns to step m2 and the above operation is repeated. If it is confirmed in step m9 that the reproducing operation is to be completed, the process moves to the next step m10, where the reproducing operation is completed.

The above describes recording and playback when the B mode recording operation is adopted in which audio recording is performed first and image recording is performed later. The recording operation (hereinafter referred to as C mode recording operation) is performed according to the flowcharts shown in FIGS. 6 and 7. Of these, FIG. 6 shows the operation during image recording, and FIG. 7 shows the operation during audio recording. Further, FIG. 8 is a schematic diagram showing a recording format of a signal on the magnetic tape 12 by a C mode recording operation. With reference to FIGS. 6 to 8, the recording operation of the DAT when the C mode recording operation is adopted will be described below. In this recording operation, first, video signals are sequentially recorded on the magnetic tape 12 according to the flowchart of FIG. That is, following the start of the recording operation in step c1, a still image video signal for one screen to be recorded is input to the input terminal TV in step c2. No audio signal is input at this time.

Hereinafter, similarly to the case of image recording in the B-mode recording operation, the input video signal is sampled by the A/D conversion circuit 6 in the next step c3 and converted into an 8-bit digital video signal D3. and is applied to the data bus 7 as a parallel signal, and written from the data bus 7 to the image memory 8a in step c4.

In step c5, the digital video signal for one screen written in the image memory 8a is read out from the image memory 8a over a second time period that is sufficiently longer than the first time period, and is then sent to the P/S conversion circuit 9. , P/S converted in step c6, and output as a serial signal to the input terminal 53 of the changeover switch 5.

In the next step c7, the recording signal processing section 11 adds sub information for error correction and other sub information to the input digital video signal, and also performs signal processing such as modulation. Ru.

The digital video signal that has undergone signal processing is sequentially recorded on two channels set on the magnetic tape 12 in the next step c8.

At this time, as one of the side information, FIG.
), the above-mentioned block search subcode b is also recorded in the subcode recording area of the magnetic tape 12 in step c9 as a pair of one screen's worth of still image video signal and the corresponding audio signal. It is recorded in association with the still image video signal recording areas V1, V2, . . . of one section R1, R2, . In this recording operation, since only the video signal is recorded, the audio signal recording areas A1, A2, . . . of one section R1, R2, .

In the next step c10, it is checked whether the recording operation should be ended or not. If the recording operation is to be continued, the process returns to step c2 and the above operation is repeated.

If it is confirmed in step c10 that the recording operation is to be completed, the process moves to the next step c11, where the image recording operation is completed.

In this way, the magnetic tape 12 has the image shown in FIG.
As shown in (a), video signals v1, v2, . . . for one screen are discontinuously recorded in video signal recording areas V1, V2, . . . for each section R1, R2, .

[0087] When the recording of the video signal is completed, next, as shown in FIG.
An audio signal is recorded on the magnetic tape 12 according to the flowchart. That is, following the start of the recording operation in step d1, an operation is performed in step d2 to search for the recording position on the magnetic tape 12 of the audio signal to be recorded.

In this operation, a recorded video signal, that is, a still image, is played back by the playback operation, and at the time when the still image corresponding to the audio signal to be recorded is played back, the user turns on a search start switch (not shown), for example. This is done automatically by setting it to . In this search behavior,
Using as an index the section search subcode b recorded in the subcode recording area in parallel with the previous image recording, the target head position of the audio recording area A1 of the section R1, for example, is searched.

In the next step d3, an audio signal corresponding to the speaker on the right side in front of the listener is inputted to the input terminal TR, and an audio signal corresponding to the speaker on the left side in front of the listener is inputted to the input terminal TL.

Hereinafter, similarly to the case of audio recording in the B-mode recording operation, the audio signals input from the input terminals TR and TL are sent to the A/D conversion circuits 1 and 1 in step d4.
2 are converted into digital audio signals D1 and D2, respectively,
It is derived as a series signal on lines 3 and 4. line 3,
The digital audio signals D1 and D2 derived from the input terminal 4 are applied to input terminals 51 and 52 of the changeover switch 5, respectively.

The output terminal 54 of the changeover switch 5 is selectively supplied with the digital audio signal derived from the input terminals 51 and 52, and the digital audio signal is supplied from the line 10 to the recording signal processing section 11.

In the next step d5, the recording signal processing unit 11 adds sub information for error correction and other sub information to the input digital audio signal, and further performs signal processing such as modulation. . The digital audio signals that have undergone signal processing are sequentially recorded on two channels set on the magnetic tape 12 in the next step d6.

[0093] As a result, for example, the still image video signal v
The narration audio signal a1 corresponding to the recorded image No. 1 is recorded in the unrecorded area A1 in the latter half of one section R1. That is, the still image video signal v1 of the image and the corresponding narration audio signal a1 are recorded in pairs, dividing the recording area of the section R1 into two.

In the next step d7, it is checked whether the recording operation should be ended or not. If the recording operation is to be continued, the process returns to step d2 and the above operation is repeated. If it is confirmed in step d7 that the recording operation is to be completed, the process moves to the next step d8, where the audio recording operation is completed.

In this way, the magnetic tape 12 has the image shown in FIG.
As shown in (b), audio signals a1, a2, etc., for example, narrations corresponding to still images are recorded discontinuously in audio signal recording areas A1, A2, etc. for each section R1, R2, ... . In addition, in this C mode recording operation, since the size of the audio recording areas A1, A2, etc. in each section R1, R2, etc. is fixed at the time of image recording, the data of each audio signal during audio recording is The amount needs to be limited to an amount that fits within the recording areas A1, A2, . . . .

The arrangement of signals recorded by the C mode recording operation is the same as the signal arrangement recorded by the B mode recording operation, and therefore is reproduced by the same operation as the previous reproduction operation.

In the recording operation using the DAT, as described above, the video signal and the corresponding audio signal are recorded in pairs in front and rear sections of the magnetic tape 12, so that only the video signal is recorded. Alternatively, it becomes possible to partially post-record only the audio signal.

[0098]

As described above, according to the recording and reproducing apparatus of the present invention, for example, by the recording operation by the image recording means,
First, still image information for multiple screens is recorded discontinuously on a magnetic tape, and sub-information for partition search is recorded in the sub-information recording area of the magnetic tape by a parallel recording operation of the sub-information recording means. Audio information corresponding to each of the still image information is recorded discontinuously on the magnetic tape using the recorded sub-information for section search as an index by a recording operation by an audio recording means having a different time sequence of recording operation. . As a result, one screen of still image information and corresponding audio information are recorded in each section of the magnetic tape, dividing the area into two and recording the area before and after each section. In the area where still image information for minutes is recorded,
It is possible to post-record new still image information or post-record new audio information in an area where arbitrary audio information is recorded.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a recording/reproducing apparatus that is an embodiment of the present invention.

FIG. 2 is a flowchart showing audio recording in the B-mode recording operation by the recording/reproducing apparatus of the embodiment.

FIG. 3 is a flowchart showing image recording in the B-mode recording operation by the recording/reproducing apparatus of the embodiment.

FIG. 4 is a schematic diagram showing a recording format on a magnetic tape according to a B-mode recording operation.

FIG. 5 is a flowchart showing a reproducing operation by the recording/reproducing apparatus of the embodiment.

FIG. 6 is a flowchart showing image recording in the C mode recording operation by the recording/reproducing apparatus of the embodiment.

FIG. 7 is a flowchart showing audio recording in the C mode recording operation by the recording/reproducing apparatus of the embodiment.

FIG. 8 is a schematic diagram showing a recording format on a magnetic tape according to a C mode recording operation.

FIG. 9 is a schematic diagram showing a recording format on a magnetic tape by a conventional recording device.

[Explanation of symbols]

1, 2, 6 A/D conversion circuit 5, 15 Selector switch 8a, 8b Image memory 9 P/S conversion circuit 11 Recording signal processing section 12 Magnetic tape 13 Reproduction signal processing section 16, 17, 19 D/A conversion circuit 18 S/P conversion circuit TR, TL, TV input terminal TR1, TL1, TV1 output terminal

Claims (1)

[Claims] Claim 1: Information forming one block of pairs of still image information and corresponding audio information is sequentially recorded in a main information recording area of a magnetic tape, and the paired still image information and audio information are recorded in sequence. In a recording and reproducing apparatus that reproduces data in parallel, an image recording means records only the still image information of each section in a discontinuous manner on a magnetic tape in association with each section; , an audio recording means for discontinuously recording only the audio information of each section on a magnetic tape in association with each section, and a recording means of the image recording means and the audio recording means that records on the magnetic tape first. and a sub-information recording means for recording sub-information for partition search in the sub-information recording area of the magnetic tape, in parallel with the recording operation of the magnetic tape. A recording/reproducing device characterized by: