JPH04366469A - Recorder/reproducer - Google Patents

Abstract

PURPOSE:To suitably reproduce a record signal by recording formats even when one magnetic tape is recorded by using a BGV system together with a presentation system. CONSTITUTION:Format identification information for identifying a recording format is recorded on a subinformation recording area corresponding to a main information recording area by a record signal processor 11 in parallel with an operation in which the processor 11 records still picture information and voice information on the main information recording area of a magnetic tape 12 in response to the format selected by recording format circuits 20, 21. The same partition identification number is recorded on the subinformation recording area by the processor 11 until the format is switched. At the time of reproducing, a reproduction signal processor 13 reproduces corresponding to the format based on the format identification information recorded on the subinformation recording area.

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.

[0003] 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 can be simultaneously recorded as sub information. Even if noise occurs, it can be repaired, and therefore not only can the original sound be faithfully reproduced, but also audio can be reproduced 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 still image video signals for one screen are prepared, and during recording, the video signals for one screen are converted into analog It is converted into a digital signal by a digital (hereinafter referred to as A/D) 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 A/D 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. 7 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.

In this recording format, the audio signal is recorded continuously as shown in FIG. 7, whereas the video signal is recorded in the first and second fields corresponding to one screen, that is, one still image. Since only these signals are intermittently recorded only when necessary, this is effective for reproducing still images as BGV (Background Video) during audio reproduction, for example.

Separately, in a DAT with the same configuration, the 2-channel mode is selected and the audio signal and still image video signal are transferred to the 2-channel area set on the magnetic tape as shown in FIG.
A format in which recording is performed alternately as shown in the figure below has also been proposed. In this case, since audio and still images are played back alternately during playback, this is effective for so-called presentations such as catalog introductions. In the following description, the former recording format will be referred to as the BGV format, and the latter recording format will be referred to as the presentation format.

[0014]

[Problems to be Solved by the Invention] However, the above-mentioned conventional DAT has the problem that it cannot be played back properly unless it is recorded in one of the BGV format and the presentation format on a single magnetic tape. There is a point. That is, even if recording is performed using both the BGV format and the presentation format on one magnetic tape, there is no function provided to properly reproduce recorded signals according to the respective recording formats.

Accordingly, an object of the present invention is to provide a recording and reproducing apparatus that can properly reproduce recorded signals according to each recording format even if different recording formats are mixed and recorded on one magnetic tape. It is.

[0016]

[Means for Solving the Problems] The present invention provides a recording function using a parallel recording format for recording still image information and audio information corresponding thereto in parallel in the main information recording area of a magnetic tape, and a recording function for recording still image information and audio information corresponding thereto in parallel. A main information recording means having a recording function using a separate recording format for recording corresponding audio information in two parts, front and rear, in the main information recording area of a magnetic tape, and an alternative between both recording functions of the main information recording means. In parallel with the recording by the main information recording means, the recording format switching means activates the format identification information for identifying the recording format in the main information recording area, and the sub information of the magnetic tape corresponding to the main information recording area. Format information recording means to be recorded in a recording area, and main information of a magnetic tape that is unified in the recording format at that time from when the recording format is switched by the recording format switching means until the next switching is carried out. A partition information recording means for recording partition identification information that identifies a recording area as one partition from other main information recording areas in a sub-information recording area corresponding to the main information recording area, and reproducing recorded main information in a parallel recording format. It has a function to play back main information recorded in a separate recording format, and by reading the format identification information recorded in the sub-information recording area of the magnetic tape, it reproduces still image information and audio by operating according to the recording format. The present invention is a recording/reproducing apparatus characterized by comprising: information and reproducing means for reproducing information from a magnetic tape.

[0017]

[Operation] According to the present invention, in parallel with the main information recording means recording still image information and audio information in the main information recording area of the magnetic tape according to the recording format switched and selected by the recording format switching means, the magnetic tape Format identification information for identifying the current recording format is recorded by the format recording means in a sub-information recording area of the tape corresponding to the main information recording area. Also,
Until the recording format is switched, the same partition identification information is recorded in the sub-information recording area of the magnetic tape by the partition information recording means.

At the time of reproduction, based on the format identification information recorded in the sub information recording area of the magnetic tape, the reproduction means performs a reproduction operation corresponding to the recording format, and the information recorded in the main information recording area of the magnetic tape is reproduced. The still image information and audio information are played back.

Furthermore, the section information recorded in the sub-information recording area of the magnetic tape can be used as a search indicator to identify each main information recording area of the magnetic tape, which is standardized in an arbitrary recording format, as a separate section. Ru.

[0020]

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/reproducing device is a DAT that can select between a 2-channel mode and a 4-channel mode as an operating state.
The channel mode is selected when recording in the presentation recording format, and the 4-channel mode is selected when recording in the BGV recording format.

In the 2-channel mode selected for recording in the presentation recording format, 2 channels are set in the main information recording area of the magnetic tape, and these 2 channels are used for recording and reproducing two types of audio signals, as will be described later. It can be switched between being used as a camera and recording and reproducing still image video signals.

Furthermore, in the 4-channel mode selected for recording in the BGV recording format, 4 channels are set in the main information recording area of the magnetic tape, and as will be described later, 2 channels are used to store 2 types of audio signals. The remaining two channels are used for recording and reproducing still image video signals.

In FIG. 1, the input terminal TR is a terminal for inputting one type of audio signal, and the audio signal in this case is, for example, a signal output from a speaker placed on the right side in front of the listener. This is the correct audio signal. Another input terminal TL 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 in front of the listener on the left side. It is.

[0024] 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.

The A/D conversion circuits 1 and 2 have the 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 The sampling frequency of the A/D conversion circuits 1 and 2 is, for example, 48 KHz. Output terminals of the A/D conversion circuits 1 and 2 are connected to input terminals 51 and 52 of the changeover switch 5 via lines 3 and 4, respectively.

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. The sampling frequency of the A/D conversion circuit 6 is, for example, 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. Switching of the changeover switch 5 is controlled based on control signals A/V, LR, and LR1 from the recording signal processing section 11.

In this embodiment, the recording operation is performed using the above-mentioned BG.
There are two types: one based on the V format recording format and the other based on the presentation format recording format. In the recording operation using the BGV method, the output terminal 54 of the changeover switch 5 is switched and connected between the input terminals 51 to 53. That is, the digital audio signal D1 output from the A/D conversion circuit 1 and the digital audio signal D2 output from the A/D conversion circuit 2 are output from the A/D conversion circuit 6 as recording signals assigned to two channels. The digital video signal D3 is taken into the recording signal processing section 11 as a recording signal to be assigned to the remaining two channels.

On the other hand, in the recording operation using the presentation method, the time segment in which the audio signal is assigned to two channels and the time segment in which the video signal is assigned to the two channels are alternately repeated, and the above switching is performed in the time segment for audio signal assignment. The output terminal 54 of the switch 5 is switched and connected between the input terminals 51 and 52, and the output terminal 54 of the changeover switch 5 is kept connected to the input terminal 53 during the video signal allocation time segment. That is, in the time segment for audio signal assignment, the digital audio signals D1 and D2 are handled as recording signals for two channels, and in the time segment for video signal assignment, the digital video signal D3 is handled as a signal for two channels by the recording signal processing unit 11. be included.

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 format identification subcode F and a partition identification subcode Chap, which will be described later.

[0033] The above format identification subcode F is:
This is sub-information for identifying whether the recording format used when recording the digital signal output from the recording signal processing section 11 in the main information recording area of the magnetic tape 12 is the BGV format or the presentation format. Further, the section identification sub-code Chap is sub-information for identifying continuous main information recording areas unified in the same recording format on the magnetic tape 12 as one section from other sections. These subcodes are recorded in the sub-information recording area of the magnetic tape 12 in parallel with the recording of the digital audio signal and the digital video signal in the main information recording area.

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 applying the digital signal derived from the reproduced signal processing section 13 to the input terminal 154 via the line 14 to each output terminal 151 to 153 by a switching operation. The switching of the changeover switch 15 is performed using control signals A/V, LR,
Controlled based on LR1.

In the reproduced signal processing section 13, the magnetic tape 12
Based on the format identification signal F read from the subcode recording area of the magnetic tape 12, it is determined which recording format the signal read from the main data recording area of the magnetic tape 12 is based on, and the control signal A/A corresponding to the format is generated. V, LR, and LR1 are applied to the changeover switch 15.

When a signal in the BGV recording format is read, the input terminal 1 of the changeover switch 15
54 is switched and connected between each output terminal 151-153. On the other hand, when a signal according to the recording format of the presentation method is read, the reproduction time divisions of the audio signal and the reproduction time division of the video signal are alternately repeated, and in the reproduction time division of the audio signal, the changeover switch 15
The input terminal 154 of the selector switch 15 is switched and connected between the input terminals 151 and 152, and the input terminal 154 of the changeover switch 15 is kept connected to the input terminal 153 during the video signal reproduction time segment.

Output terminal 151 of the changeover switch 15,
152 are corresponding D/A conversion circuits 16 and 17, respectively.
It is connected to the.

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 TR2, 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.

The recording format switching circuit 21 is a circuit for selectively activating the recording function according to the BGV recording format and the recording function according to the presentation recording format provided in the recording signal processing section 11. A format changeover switch 20 is connected to the circuit for specifying which of the above recording formats to select.

FIG. 2 is a timing chart showing the recording and reproducing operation when the BGV recording format is selected in the DAT, and FIG. 3 is a timing chart showing the recording and reproducing operation when the presentation recording format is selected. This is a timing chart, and FIG. 4 is a timing chart of the above DA.
3 is a diagram schematically showing an example of signal recording on the magnetic tape 12 by a recording operation of T. FIG. Each operation of recording and reproducing the DAT will be described below with reference to FIGS. 2 to 4.

Recording For example, when the selector switch 20 is set to the BGV side, the recording format switching circuit 21 activates the recording function of the recording signal processing section 11 in accordance with the BGV recording format. As a result, control signals A/V, LR, and LR1 shown in FIG. 2 are applied to the changeover switch 5 from the recording signal processing section 11 as changeover control signals.

At this time, 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. Furthermore, the input terminal TV is provided with a signal that corresponds to the audio signal, for example, in synchronization with the start of input of the audio signal, or at an arbitrary timing.
A still image video signal for a screen is input.

Audio signals inputted from input terminals TR and TL are converted into, for example, 16-bit digital audio signals D1 and D2 by A/D conversion circuits 1 and 2, respectively, which perform sampling operations at a sampling frequency of 48 KHz. , 4 as serial signals. line 3
, 4 are applied to input terminals 51 and 52 of the changeover switch 5, respectively.

On the other hand, the video signal input to the input terminal TV is converted into an 8-bit digital video signal D3 by the A/D conversion circuit 6 that performs sampling operation at a sampling frequency of 14.3 MHz, and is sent to the data bus 7 as a parallel signal. Given. This digital video signal D3 is written to the image memory 8a via the data bus 7.

The output terminal 54 of the selector switch 5 is selectively supplied with the digital audio signal led out to the input terminals 51 and 52 and the digital video signal led out to the input terminal 53, and the digital audio signal is sent to the line 10. The signal is given to the recording signal processing section 11 from That is, the changeover switch 5
The switching operation in is performed in synchronization with the sampling period in the A/D conversion circuits 1 and 2.

In the recording signal processing section 11, sub information for error correction and other sub information for input digital audio signals and digital video signals are added to each digital signal, and further signal processing such as modulation is performed. be done. In this case, as sub information, format identification sub code F
(=0) and a section identification subcode Chap (=1) are added.

The digital audio signal that has undergone signal processing is stored in the main data recording area for two channels set on the magnetic tape 12, and the digital video signal is stored in the main data recording area for the remaining two channels as shown in FIG. The data are recorded in parallel and sequentially as shown in Section 1 of .

At this time, the above-mentioned format identification subcode F (=0) and partition identification subcode Chap (=1) are recorded in the subcode recording areas corresponding to these main data recording areas. Ru.

Next, for example, when the format changeover switch 20 is set to the presentation side, the recording format changeover circuit 21 correspondingly switches the recording function of the recording format of the presentation system among the recording functions of the recording signal processing section 11. Activate. As a result, the recording signal processing unit 11 sends the control signals A/V, A/V, shown in FIG.
LR and LR1 are given.

That is, in this setting state, as shown in FIG. 3, the video signal assignment time segment and the audio signal assignment time segment are alternately repeated, and in the video signal assignment time segment, the output terminal 54 of the changeover switch 5 is connected to the input terminal 53, and the changeover switch 5 is alternately switched between the input terminals 51 and 52 in the time segment of audio signal assignment.

Therefore, in the time segment of video signal allocation, the video signal for one screen inputted from the input terminal TV is converted into a digital video signal D3 by the A/D conversion circuit 6, and then sent through the data bus 7 to the image signal D3. After being written to the memory 8a, the parallel signal is converted into a serial signal by the P/S conversion circuit 9, and the recording signal processing unit 1 outputs the signal as a recording signal for two channels.
1.

The recording signal processing section 11 adds sub-information for error correction and other sub-information to the captured digital video signal, and further performs signal processing such as modulation. In this case, the sub-information includes a format identification subcode F (=1) and a partition identification subcode Chap (=2
) is added. The format identification subcode F (=1) in this case indicates that the recording format at this time is the presentation format. Also,
In this case, the value of the section identification subcode Chap (=2) has been added by "1" since the previous recording, and the main information recording area at this time is a section different from the previous main information recording area. It represents that.

Furthermore, in the time division of audio signal allocation, the respective audio signals inputted from the input terminals TR and TL are converted into digital audio signals D1 and D2 by the corresponding A/D conversion circuits 1 and 2, and the switching Input terminal 5 of switch 5
1, 52, and an output terminal 53, and are taken into the recording signal processing unit 11 as recording signals for two channels. As in the case of the digital video signal described above, the recording signal processing unit 11 processes the captured digital audio signal by adding sub information for error correction, a format identification subcode F (=1), and a partition identification subcode to the captured digital audio signal. Sub-information such as code Chap (=2) and recording error correction code are added.

The digital video signal for one screen that has undergone signal processing in the time division of video signal allocation is transferred to the magnetic tape 1.
The digital audio signal corresponding to the still image for one screen recorded in the main information recording area No. 2 and then subjected to signal processing in the time division of audio signal allocation is recorded in the main information recording area as shown in section 2 of FIG. are recorded alternately and sequentially.

Hereinafter, the recording format is switched as shown in section 3 and section 4 in FIG. 4 according to the method set by the changeover switch 20, and a format identification indicating the recording format is provided in the sub information recording area. subcodes F (=0) and F (=1) are recorded. Furthermore, each time the format changeover switch 20 is changed, that is, each time the recording format is changed, the value of the partition identification subcode Chap recorded in the subinformation recording area is incremented, and the recording format is unified according to this value. Each section of the magnetic tape 12 that is stored is identified. A recording signal is read from the reproduction magnetic tape 12 by a rotating magnetic head (not shown), and the read signal is input to the reproduction signal processing section 13.

The reproduced signal processing unit 13 performs demodulation and error correction processing based on the reproduced sub-information, and the digital signal subjected to such signal processing is applied from the line 14 to the input terminal 154 of the changeover switch 15. . At the same time, the reproduction signal processing unit 13 determines whether the recording signal read from the magnetic tape 12 is recorded in the BGV recording format or in the presentation format, based on the format identification subcode F, which is reproduction sub-information. Switch 1 determines whether the data has been recorded and switches the control signal A/V, LR, LR1 according to the method.
Give to 5.

Now, the magnetic tape 1 is in the recording state shown in FIG.
2 is played back from the beginning of the tape BOT, the format identification subcode read at this time is F(
= 0), the control signals A/V, LR, L shown in FIG.
R1 is given. That is, in this case, the input terminal 154 of the changeover switch 15 is connected to each of the output terminals 151 to 15.
3 alternately.

As a result, the output terminal 153 has an input terminal T.
A digital video signal corresponding to the video signal input from V is derived, and the signal is given to the S/P conversion circuit 18 and given to the data bus 7 as a parallel signal of 8 bits each. This digital video signal is written into one of the image memories 8a and 8b via the data bus 7.

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

On the other hand, the output terminal 151 of the changeover switch 15
, 152 derive digital audio signals corresponding to the audio signals input from the input terminals TR, TL, and these signals are converted into analog signals by the D/A conversion circuits 16, 17, respectively, and are sent to the output terminals TR1, TL1. derived.

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.

When the playback position of the magnetic tape 12 moves from section 1 to section 2, the read format identification subcode becomes F (=1). Therefore, the control signal applied from the reproduced signal processing section 13 to the changeover switch 15 is switched from the control signal shown in FIG. 2 to the control signal shown in FIG. 3.

As a result, in the time segment in which the digital video signal is read from the main information recording area of the magnetic tape 12,
The input terminal 154 of the changeover switch 15 remains connected to the output terminal 153, and the input terminal 154 of the changeover switch 15 is alternately switched between the output terminals 151 and 152 during the time period in which the digital audio signal is read.

Therefore, the digital video signal is sent to the S/P conversion circuit 18, image memories 8a, 8b, data bus 7, D
The signal is reproduced through the /A conversion circuit 19 and output to the output terminal TV1. Further, the corresponding digital audio signals are reproduced through D/A conversion circuits 16 and 17, respectively, and output terminals T.
R1 and TL1.

Thereafter, in the same manner, the switching control of the changeover switch 15 is changed according to the read format identification subcode F, and the reproduction operation according to the recording format is performed.

[0072] Furthermore, the section identification subcode Chap is as follows:
It is used as an index when searching for a desired section from among the sections of the magnetic tape 12 that have a unified recording format.

In the above embodiment, a case has been described in which the recording format is changed many times on the way to one magnetic tape 12. However, when recording only in the BGV recording format, the magnetic tape 12 The recorded contents on the magnetic tape 12 are as shown in FIG. 5, and when recording only in the presentation format recording format, the recorded contents on the magnetic tape 12 are as shown in FIG.

[0074]

As described above, according to the recording and reproducing apparatus of the present invention, the main information recording means records still image information in the main information recording area of the magnetic tape according to the recording format selected by the recording format switching means. In parallel with recording audio information, format identification information for identifying the recording format at that time is recorded by the format recording means in the sub information recording area corresponding to the main information recording area of the magnetic tape. The same partition identification information is recorded by the partition information recording means in the sub-information recording area of the magnetic tape until the format is switched, and at the time of playback, the playback means records the same partition identification information in the sub-information recording area of the magnetic tape based on the format identification information recorded in the sub-information recording area of the magnetic tape. By performing the playback operation corresponding to the recording format,
Since still image information and audio information recorded in the main information recording area of the magnetic tape are played back, different recording formats, such as BGV, can be recorded on a single magnetic tape.
Even if recording is performed using a mixture of presentation formats and presentation formats, it is possible to properly reproduce recorded signals according to each recording format.

Furthermore, the section information recorded in the sub-information recording area of the magnetic tape can be used as a search indicator to identify each main information recording area of the magnetic tape, which is standardized in any recording format, as a separate section. .

[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 timing chart showing a recording and reproducing operation corresponding to the BGV recording format in the recording and reproducing apparatus of the embodiment.

FIG. 3 is a timing chart showing a recording and reproducing operation corresponding to a presentation format recording format in the recording and reproducing apparatus of the embodiment.

FIG. 4 is a diagram schematically showing an example of signal recording on a magnetic tape by the recording/reproducing apparatus of the embodiment.

FIG. 5 is a diagram schematically showing another example of signal recording on a magnetic tape by the recording/reproducing apparatus of the embodiment.

FIG. 6 is a diagram schematically showing still another example of signal recording on a magnetic tape by the recording/reproducing apparatus of the embodiment.

FIG. 7 is a diagram schematically showing an example of signal recording on a magnetic tape by a conventional recording/reproducing device.

FIG. 8 is a diagram schematically showing another example of signal recording on a magnetic tape by a conventional recording/reproducing 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 20 Format selection switch 21 Recording format switching circuit

Claims (1)

[Claims] Claim 1: A recording function using a parallel recording format that records still image information and audio information corresponding thereto in parallel in the main information recording area of a magnetic tape, and a recording function that records still image information and audio information corresponding thereto on a magnetic tape. main information recording means having a recording function using a separate recording format for recording in two parts, front and rear, in the main information recording area of the main information recording area; and recording format switching means for selectively activating both recording functions of the main information recording means. and, in parallel with the recording by the main information recording means, format information recording for recording format identification information for identifying the recording format in the main information recording area in the sub information recording area of the magnetic tape corresponding to the main information recording area. and from the time the recording format is switched by the recording format switching means until the next switching, the main information recording area of the magnetic tape unified with the recording format at that time is set as one section, and other sections are A partition information recording means for recording partition identification information for identifying the main information recording area in a sub-information recording area corresponding to the main information recording area, a function for reproducing the recorded main information by a parallel recording format, and a function by a separate recording format. It has a function of reproducing main recording information, and by reading format identification information recorded in the sub-information recording area of the magnetic tape, reproduces still image information and audio information from the magnetic tape in an operation according to the recording format. 1. A recording and reproducing device comprising a reproducing means.