JPS6331068A - Recorder - Google Patents

Abstract

PURPOSE:To record thereafter a sound signal and to shorten an access time until reproduction is executed by providing a block not to execute the video recording at every time a video signal is recorded to the prescribed number of a block at the time of recording. CONSTITUTION:When an after-recording mode is set, recording 43 is executed, a head 2 is shifted to a next empty track 45 and a recording counter in a system controller 5 is incremented. Here, while a recording counter records, for example, after the recording of the video signal is executed by five tracks such as a present execution example, the counter is provided in the system controller 5 to shift a head for a track for the after-recording and set the empty track. Next, when the contents of the recording counter are '5', a head 2 is shifted to the outer-most circumference empty track and the contents of the recording counter is reset to '0'.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a recording device, and particularly to a recording device for recording video signals on a recording medium.

<Prior art> Development of a recording device that records video signals on a conventional recording medium, such as a recording device that can record one field's worth of video signals on concentric tracks formed on a magnetic sheet called a video floppy. is in progress.

On such a magnetic sheet, for example, audio information of about 20 seconds can be compressed on the time axis, and then FM modulated and recorded on the track.

<Problems to be Solved by the Invention> However, in such a recording device, only one of the video signal for one field or the audio signal for a predetermined period of time can be recorded on one track. If a signal and an audio signal are to be reproduced at the same time, the video signal will be reproduced while the audio signal is written to the memory, expanded on the time axis, and reproduced.

In this case, if the audio signal is recorded on a specific track, for example, the innermost track, the video signal will not be played back for a relatively long period of time, such as when the head is moved to play back the audio signal while the video signal is being played back. A problem arose that resulted in the suspension of the program.

This problem occurs not only in recording media such as magnetic sheets, but also in recording devices that can selectively record either audio signals or video signals in a plurality of recording areas (blocks).

The present invention aims to solve such problems.

Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention provides a recording device that records a video signal in each block on a recording medium by a recording means, and in which the video signal is recorded by the recording means. The present invention is characterized by comprising a control means that performs control so as to provide a block on which video recording is not performed every time a predetermined number of blocks are recorded.

Function> In the above configuration, the control means is controlled so that a block, for example, an empty block, on which no video recording is performed is provided every time a predetermined number of blocks of video signals are recorded. The configuration of the embodiment will be explained using FIG. 1. In the embodiments described below, an apparatus for recording and reproducing still image information and audio information on a magnetic disk is disclosed, but the present invention is not limited to this, and a recording medium such as an optical disk may be used. Further, the medium is not limited to a disk shape, but may be a card shape, and may not have a track shape.

FIG. 1 is a block diagram of a recording apparatus according to an embodiment of the present invention.

In FIG. 1, a magnetic sheet 1 as a recording medium can freely set a video track Trv as a recording area and an audio track TrA corresponding to this track. 2 is a magnetic head that performs recording and reproduction on the audio track T r A and video track TRV; 3 is a pulse motor that moves this magnetic head 2 in the radial direction;
Reference numeral 4 represents a motor control circuit for controlling the drive of the pulse motor 3, and reference numeral 5 represents a system controller for controlling the motor control circuit and a circuit to be described later. 6 is a switch for selectively connecting the magnetic head 2 to the output of the recording system A and the input of the reproducing system B;
The output of the recording system A is connected to the terminal 6a, and the input of the reproduction system B is connected to the terminal 6b. In this recording system A, 7
1 is a camera that converts an incident optical image into an electrical signal; 8 is a microphone that sends out an audio signal; 9 is a PCM modulation circuit that PCM modulates the audio signal from the microphone 8;
0 is a memory that stores the audio signal from the PCM modulation circuit 9; 11 is a time-base compression circuit that reads out the audio signal stored in the memory 10 at high speed in order to compress the time-base; 12 is the camera 7 and time-base compression This switch selectively connects the output of the circuit 11 to the FM modulation circuit 13. The camera 7 is connected to the terminal 12a of this switch 12, and the camera 7 is connected to the terminal 12b.
A time axis compression circuit 11 is connected to. 15 is a DPSK modulation circuit for DPSK-modulating a data signal, which will be described later, output from the system controller 5; 16 is a DP
A bandpass filter (B
PF), 17 is a frequency multiplexer for frequency multiplexing the data signal sent from this BPF 16 and the audio and video signals sent from the FM modulation circuit 13 via the gate circuit 14; 18 is a frequency multiplexer from this frequency multiplexer 17; This is a recording amplifier that amplifies the output of

In the reproduction system B, 19 is a reproduction amplifier that amplifies the reproduction signal via the switch 6, 20 is a bandpass filter (BPF) connected after this amplifier 19, and 21 is this BPF.
This is a DPSK demodulation circuit that performs DPSK demodulation on the data signal sent out from the PF 20, and the data signal demodulated here is input to the system controller 5.

23 is an FM demodulation circuit for FM demodulating the video signal inputted via the regenerative amplifier 19 and the gate circuit 22;
and a switch for selectively changing the connection with the time axis expansion circuit 26.A connection switch 27 for connecting to the monitor 25 is connected to the terminal 24a of this switch 24.
A time axis expansion circuit 26 is connected to b. The time axis expansion circuit 26 includes a memory 28 that stores audio signals, and expands the time axis by lowering the speed at which audio signals are read from the memory 28 relative to the speed at which the audio signals are written into the memory 28. 29 is a PCM demodulation circuit for PCM demodulating the audio signal read out from the memory 28, and 30 is a speaker connected to the PCM demodulation circuit 29 via a connection switch 31. A timing pulse generator 32 sends out timing pulses for reading audio signals from the memory 28, and sends out timing pulses when a start pulse from the system controller 5 is input. Further, the system controller 5 discriminates the data signal from the DPSK demodulator 1, generates a start pulse when an audio signal is recorded, and reproduces the audio signal.

The system controller 5 also includes a recording/playback mode setting switch 41 which is turned on when setting the recording mode and turned off when setting the playback mode, and a recording/playback mode setting switch 41 that is turned on when setting the recording mode and turned off when setting the playback mode. a setting switch 42 for setting the normal recording mode or an after-recording (dubbing) mode, a recording execution switch 44 for determining the recording trigger timing, and a setting switch 44 for setting the track to be accessed by the head 2. UP switch 4 to shift to 1 track inner station side
5. While the DOWN switch 46, which shifts the track to the outer circumferential side, and the recording execution switch 44 are on, there is a continuous recording mode in which recording is performed continuously while moving the head 2, or when the recording execution switch 44 is on. Even head 2
After recording is performed on the track accessed by the user, no further recording will be performed until the recording execution switch is turned off and then turned on again.
A series setting switch 47 is connected. Further, 35 is a sheet presence/absence detection circuit that detects the presence or absence of a magnetic sheet from the outputs of the photocouplers 35A and 35B, and 36 is a sheet presence/absence detection circuit that detects the output of the regenerative amplifier to determine whether the track being accessed by the head 2 has been recorded or not. an envelope detection circuit for determining whether there is an empty track; 37 is a display unit that displays a warning when there is no empty track according to the output of the system controller 5;
39 is a setting dial which will be described later in FIG.

FIG. 2 shows an example of the recording format of a data signal that is frequency-multiplexed with a video or audio signal by the frequency multiplexer 17. In FIG. be done. 1 video signal to b
2 indicates whether to record by field or by frame. A 19-bit signal representing the date is recorded in d. A 1-bit signal indicating whether the signal recorded on the track is a video signal or an audio signal is recorded in e. Here, it is assumed that "O" is recorded when the signal to be recorded is a video signal, and "1" is recorded when the signal is an audio signal. A signal indicating whether there is an after-recording track or a video signal corresponding to the video or audio signal recorded on this track is recorded in f.

Here, if there is a corresponding dubbing track or audio signal, "0" is recorded, and if there is not, "1" is recorded. If rQJ is recorded in f above, 0g is the corresponding dubbing track or audio signal. A 6-bit signal representing the track number or the track number on which the video signal is recorded is recorded.

Next, the operation of the embodiment configured as described above will be explained using the flowcharts shown in FIGS. 3 to 7.

First, when a power switch (not shown) is turned on, it is first determined from the output of the sheet presence/absence detection circuit 35 whether the magnetic sheet 1 is present or not (#1), and if it is present, each track on the sheet 1 has been recorded. Initialize is performed to determine whether the data has been recorded or not (#3).

That is, the switch 6 is switched to 6bg11, the head 2 is sequentially moved from the track at the innermost or outermost end of the sheet 1 to the track at the opposite end, and the envelope detection circuit 36 detects whether or not each track is recorded. It is detected from the output and stored in the track memory within the system control.

Next, if the recording mode is set by the recording/reproduction mode setting switch 41, the flow branches to #7, and if the reproduction mode is set, the flow branches to #6 (#5).

When the recording mode is set, it is determined whether or not there is an empty track on the magnetic sheet from the track memory information stored in the above-mentioned initialization (#3), and if there is no empty track, a warning is displayed on the display section 37. Action (#8)
, if there is one, the head 2 is moved to the outermost empty track (#9). Next, switch switch 6 to 6a side (
#11), when the video recording mode is set by the setting switch 42, switch the switch 12 to the 12a side (#15); on the other hand, when the video recording mode is not set, switch the switch 12 to the 12b side. (#14),
The flow proceeds to 0 shown in FIG.

When the video recording mode is set, it is determined whether the dubbing mode setting switch 43 is on or not, and when the dubbing mode is set, the flow advances to O shown in Figure 5, and when the dubbing mode is not set, the flow advances to O shown in Figure 5. A recording counter, which will be described later, is reset (#19), and the flow proceeds to step 2 shown in FIG.

Next, the operation of the system controller 5 when not in the post-recording mode will be explained using FIG. 4.

In such a case, it is determined whether or not the recording execution switch 44 is turned on, and when it is turned on, the process branches to #25, the gate circuit 14 is opened, and the video signal for one field is transferred onto the magnetic sheet 1. #25) to record on the track, then determine whether there is an empty track #20). If there is no empty track, branch to #8 in Figure 3 and issue a warning; if there is, move head 2 to the next outermost track. Shift to track (#27).

Next, it is determined whether the single recording mode is set or not based on the state of the switch 47 (#29). If the single recording mode is set, wait until the recording execution switch 44 is turned off before starting the recording. Return to ■ in Figure 3.

If continuous recording mode is set, wait for a certain period of time set by the continuous recording interval (#30)
Returning to #23, if the recording execution switch 44 is turned on, recording is performed again, and if the recording execution switch 44 is turned off, the flow returns to step #23.

Next, the operation of the system controller 5 when the post-recording mode is set will be explained using FIG.

Regarding this flow, description of steps similar to those shown in FIG. 4 will be omitted.

Note that steps #23, 24, 26゜27.2 in Fig. 4
9, 30 and 31 are steps #41 and 43 in FIG. 5, respectively.
44, 45, 50, 56.57.

When the dubbing mode is set, first it is determined whether the recording execution switch is turned on or not (#41), and when the recording execution switch is turned on, recording is performed (#43), and the head 2 is moved to the next empty track. The recording counter in the system controller 5 is incremented (#45). Here, the recording counter is used to set an empty track by shifting the head by one track for dubbing after recording video signals for 5 tracks as in this embodiment, for example, during recording. It is provided within the system controller 5.

Next, determine whether the content of the recording counter is "5°" (t$49), and if it is "5", store the track number accessed by head 2 in the dubbing register (#51). ), then it is determined whether there is an empty track (#52), and if there is, the head 2 is moved to the outermost empty track (#53), and the contents of the recording counter are reset to "0"(#52). 53), Like the stack pointer, the dubbing register is a register that is read out in the order in which data is input.If there is no empty track, jump to #8 in Figure 3 and issue a warning, #50.#
For 57, see #29. This is the same as #31, so the explanation will be omitted.

Furthermore, even if an empty track is provided, the system controller 5 writes information indicating that it has been recorded to the bit corresponding to the empty track in the track memory described above, thereby preventing other video signals from being recorded on the empty track. Prevent this from happening.

In addition, whether the recording counter is reset in #55 or
Alternatively, you can set the video signal recording without setting the dubbing mode and retain the contents until it is reset in #19, so you can set the dubbing mode as the recording mode once and then set it to the playback mode. Then, set the recording mode to dubbing mode. That is, even if the dubbing mode is interrupted, one free track is automatically provided for every five tracks, which has the effect of making it easier to input audio later.

Next, the operation of the system controller 5 when the audio recording mode is set by the setting switch 42 will be explained using FIG.

In this case, it is determined whether the recording execution switch 44 is on or not (#61), and if it is off, it is written, and if it is on, it starts writing the audio signal into the memory 10. The memory 10 is composed of a shift register, and can store audio information for about 10 seconds, for example. Furthermore, when audio information for 10 seconds or more is written, the latest 10 seconds of audio signal is stored in the memory 10.

Next, it is determined whether the dubbing mode is set (#65), and in the dubbing mode, it is determined whether there is already a dubbing track on the magnetic sheet and whether there is data in the dubbing register. If there is data in the dubbing register, the data is read out (#69), and the head 2 is moved to the track corresponding to the data, that is, the dubbing track (#71).

After the recording execution switch 44 is turned on and writing of the audio signal into the memory 10 is started, the recording execution switch 44 is turned on again.
When is turned on (#66).

The audio signal stored in the memory IO is read out and the signal modulated by the FM modulation circuit 13 is recorded on the magnetic sheet 1 by the head 2 (#73), and the flow returns to step #73).

Therefore, according to the embodiment shown in FIG. 6, if the audio recording mode is set while the dubbing mode is set, the head 2 automatically moves to the dubbing track and the audio signal is transferred to the dubbing track. recorded.

According to this embodiment, since the recording execution switch, which is a trigger switch for video recording, is used as a switch for setting the start and end of recording when an audio signal is received, it is necessary to provide operating members on each side. There is no.

Next, the operation of the system controller 5 when the playback mode is set by the switch 41 will be explained using FIG.

In such a case, if the UP switches 45 and 46 are operated, the head 2 is moved one track to the inner or outer circumference (#81 to #84) 6 Then, the output of the DPSK demodulation circuit 21 is taken in ( #85) Next, it is determined whether or not the track has been recorded, and if it has been recorded, it is determined whether or not the video signal is recorded on the track by detecting the bit shown in e of the data signal shown in FIG. #8
7) If it is a video track, it is determined whether there is a track on which the corresponding audio signal is recorded by detecting the bit indicated by f of the data signal ($ 88), and if there is, the head 2 is placed on the corresponding track. Move (#90
), switch the switch 24 to ba (#92), write the reproduced audio information to the memory 28 (#94), then read the written audio information from the memory 28 at low speed, perform time axis conversion, and perform PCM demodulation. Start playing the audio demodulated by circuit 29 through the speaker (#96)
.

Next, return head 2 to the corresponding video track #98)
, the switch 24 is switched to the a side to reproduce the video signal on Tanabata 25 (#100), so the corresponding audio signal and video signal are reproduced at the same time.

Also, when it is determined in #87 that it is not a video track, switch the switch 24 to the b side (#101), then write the audio signal to the memory 28 (#102), and when the writing is completed, the timing pulse A start signal is sent to the generator 32 to start reading out the signal written in the memory 28 (#103), the audio signal is played back from the speaker, and when the reading is completed (#10)
5) Flow returns to.

Therefore, according to the above embodiment, corresponding video signals and audio signals are simultaneously reproduced.

In the above embodiment, the time during which audio input can be performed during dubbing is uniquely determined by the number of dubbing tracks, but next, the number of tracks on which video signals are recorded for one dubbing track is variable. An embodiment in which it is possible to set the post-recording time per track on which a video signal is recorded will be described.

In this embodiment, a dial 39 shown in broken lines in FIG. 1 is provided, and the flow shown in FIG. 7 is changed to that shown in FIG. 8.

In FIG. 8, steps #58, #59, and #60 are added. First, in #58, the value set on the dial 39 is read.

Next, in #59, it is determined whether or not the content of the recording counter is smaller than N, and if it is smaller than N, the process goes to #60.
In step #41, the value of the recording counter is preset to N, and if it is larger than N, the flow proceeds directly to #41.

Here, the aforementioned N is 4°3.2 and 1.0 when the values set on the dial 39 are 1.2, 3, and 4.5, respectively.
This is the value. The input of the dial 39 may be based on a code version, or a variable resistor whose resistance value changes as the dial is rotated may be detected.

According to this embodiment, the number of video signal tracks for the post-recording track can be made variable, and the usability of post-recording can be improved.

In addition, in this embodiment, the dubbing track is set in the dubbing mode whether it is in the single recording mode or in the continuous recording mode, but between #50 and #41. By providing a step for resetting the recording counter, it is possible to prevent the dubbing track from being set in the continuous recording mode even in the dubbing mode.

In other words, when attempting to reproduce a magnetic sheet recorded in M-continuous recording mode at the same speed as when it was recorded, if an after-recording track is provided, when the head 2 accesses the after-recording track, the continuous reproduction will not be possible. Although the interval will be disturbed, the above-mentioned drawback can be overcome by providing a step for resetting the recording counter between #50 and #41 as described above.

In the embodiment described above, post-recording tracks for recording audio signals are provided for each predetermined number of tracks on which video signals are recorded, but the present invention is not limited to this, and data related to video signals can be recorded in addition to audio signals. A track may be provided for each predetermined number of tracks on which video signals are recorded.

It goes without saying that the present invention is not limited to the type or shape of the medium.

<Effects of the Invention> As explained above, in the present invention, when recording a video signal on a recording medium, each time a predetermined number of blocks are recorded with a video signal, a block is provided in which no video recording is performed. It is also possible to record the signal.

Furthermore, if information that is paired with a video signal recorded in a nearby block is stored in a block that does not perform video recording, the paired information can be played back when the video signal recorded in the block is being played back. In this case, the access time until the information is reproduced can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention; FIG. 2 is a diagram showing an example of the recording format of a data signal that is frequency multiplexed with a video or audio signal by the frequency multiplexer 17; FIG. 8 is a flowchart showing the operation of the system controller 5 shown in FIG. 1-------1 Magnetic sheet 2-------Head 3------- Valse motor 10---Memory

Claims (1)

[Claims] A recording device that records a video signal in each block on a recording medium by a recording means, and a control means that performs control so that a block on which no video recording is performed is provided every time the recording means records the video signal for a predetermined number of blocks. A recording device comprising: