JP2801191B2 - Playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a video signal
Or from the recording medium on which the audio signal is recorded,
The present invention relates to a reproducing apparatus for reproducing signals and audio signals.
You. [Related Art] Conventionally, as an example of this type of device, a magnetic disk to be reproduced is used.
Each track of the disc has either a video signal or an audio signal.
Signals are recorded, and both are recorded together.
Audio recording track and video signal recording
Control information for playing tracks in relation to each other
The signal is recorded together with the time-compressed audio signal.
You. Also, audio signal recording tracks and video signal recording tracks
Tsuk is one of the tracks formed on the magnetic disk.
Any desired track can be selected. Also, on the same disk
Some video signal recordings related to audio signal recording tracks
Not only tracks but also audio signals
Some do not exist. In addition, the audio signal recorded on this disc is
It is compressed, and one track depends on the compression mode.
The recording / reproducing time of the voice is 3 seconds, 5sec.10sec.20sec.
The street is selectable. When playing this disc, the audio track must be
Plays back the playback control information signal recorded there.
Signal and demodulate the associated video signal recording track.
Discriminates, captures the audio signal into memory,
Access the video signal recording track obtained from the
To play the video, and then save it to memory.
When playing back the embedded audio signal while extending the time
The method is called. [Problems to be Solved by the Invention] However, in the above conventional example, the accessing
If the track is an audio track, the associated video
A continuous track to access the signal recording track
When moving the video, or detecting the recorded video signal.
If you do a search, a quick way to do this
Without it, it was inconvenient to use. The present invention has been made in view of the above-described problems, and has a plurality of areas different from each other.
Recording where video signal or audio signal is recorded in each area
Sequential playback speed for sequentially playing multiple video signals from a medium
Aiming to provide a fast and easy-to-use playback device.
Target. [Means for Solving the Problems] The playback apparatus of the present invention provides
Is the recording medium on which video or audio signals are recorded
In the apparatus for reproducing the video signal and the audio signal,
The video and audio signals recorded on the recording medium are reproduced.
Reproducing means for generating the sound,
Automatically sequence multiple video signals recorded on a recording medium
Operation instructing means capable of instructing to reproduce,
Prior to the instruction of the reproducing operation by the operation instruction means,
At least a video signal is recorded in a plurality of areas of the recording medium.
Searches the recorded area, and displays information indicating the search result.
The recording is performed by the instruction of the operation instruction means.
Automatically replays multiple video signals recorded on the medium sequentially
If the search result is generated, the information indicating the held search result is displayed.
The video signal is output from the plurality of areas of the recording medium according to the information.
The reproduction is performed so that only the recorded area is sequentially reproduced.
A reproduction operation control means for controlling the means. [Operation] With the above-described configuration, images are respectively projected on a plurality of different areas.
From a recording medium on which an image signal or an audio signal is recorded,
When sequentially reproducing a plurality of video signals, the
The video signal is recorded in a plurality of different areas.
Only the area where the audio signal is recorded
Since no playback is performed, the sequential playback speed of video signals is
Easy to use. [Embodiment] FIG. 1 is a block diagram of an embodiment of the present invention.
Ki disk, 2 magnetic disk, 1 to rotate at a constant speed
DC motor, 3 is the magnetic head, 4 is the magnetic head 3
A head moving mechanism for moving the head, 5 is a head moving mechanism,
4 is a head drive motor for driving, 6 is a head drive
A motor driver for driving the motor 5;
The magnetic head 3 accesses the innermost track on the magnetic disk 7.
The innermost track detection SW, 8 that turns ON when accessed,
To reproduce one pulse signal per one revolution of the disk
PG pulse generator including PG coil, 9 drives DC motor 2
Motor driver, 10 is a PG pulse generator
These output signals are input to rotate the magnetic disk at a constant speed.
A servo circuit for controlling the DC motor driver 9,
11 is reproduction for amplifying the output signal from the magnetic head 3
Amplifier, 12: MF demodulation to which signal from reproduction amplifier is input
Circuit 13 is a video signal to which the signal from the FM demodulation circuit 12 is input.
Signal processing circuit, which is connected to the video shot circuit 14.
It is. The video mute circuit 14 is connected to a system controller described later.
A circuit whose mute operation is controlled by the roller 28,
As a result, the output to the motor 15 is limited.
16 is an A / D conversion circuit to which the output of the FM demodulation circuit is input.
The A / D conversion circuit receives a clock signal from the oscillation circuit 26.
Has been entered. 17 is a memory, an A / D conversion circuit 16
From the address generator 24
Signal controls the memory address.
You. This memory stores the time expansion of the time-base compressed audio signal.
It has a function of performing the length. The D / A conversion circuit 18
Converts the output signal from the memory 17 to digital / analog
This output is the noise reduction of the audio signal.
It is connected to the audio signal processing circuit 19 that performs
ing. The output of the audio signal processing circuit 19 is an audio mute circuit
The audio muting circuit is connected to the
Circuit blocks that are muted by the stem controller 28
This output is connected to speaker 21
You. 22 is when the output signal from the FM demodulation circuit 12 is input
In addition, the information to which the signal from the timing generation circuit 25 is input is
Signal demodulation circuit, which is recorded in the audio signal recording track.
Control information signal for reproducing the
It is to demodulate. This demodulated data signal is transmitted to the
Connected to the stem controller 28, the timing generation circuit
A part of the demodulated data is also input. 23 is FM modulation time
A reproduction signal determination circuit to which the output signal of the path 12 is input,
The discrimination circuit determines whether the signal is a playback signal, video, or something else.
No, this output is not
You. 24 controls the memory 17 for reading and writing audio
Memory controller, which includes memory
17 read / write control and memory address
It is a block that includes a control circuit. 25 is
PG pulse from PG pulse oscillator
Output signal from the signal and information signal demodulation circuit
Notification signal demodulation circuit 22 and memory controller 24
The output of the timing signal is a timing signal. 26 is A / D conversion circuit 1
6 and the reference clock of the memory controller 17
The oscillation circuit that generates the signal, 27 is the D / A conversion circuit 18,
Generates a signal that serves as the reference clock for the
Oscillation circuit. 28 controls the entire system
System controller, 29 is the system controller
The ROM 30 containing the program to be controlled is
The RAM is read and written by the controller 28. SW1 is magnetic
UPS for instructing head 3 to move to the inner track
W and SW2 indicate the movement of the magnetic head 3 to the outer track.
It is downSW for. SW3 sets the audio playback mode
This is a sound reproduction mode NO / OFF switch for performing the operation. 31 is
Magnet composed of phototransistor and light emitting diode
It is a disk detection mechanism.
Useful for detecting the presence or absence of a magnetic disk between
This output is connected to the system controller 28.
ing. 32 receives an output signal from the reproduction amplifier 11
Envelope detection circuit that detects the playback envelope
Information indicating whether the track is empty or recorded according to the result
The signal is connected to the system controller 28. next
The operation of the embodiment will be described. First, formed on a magnetic disk
The number of tracks to be recorded is 50, and the maximum
The track formed on the outer circumference is the first track, the innermost circumference
Stipulates 50 tracks. Also on the inner circumference of the magnetic disk
Move the head where the magnetic head moves to the track
The moving location is defined as track down. Flow shown in FIG.
When the magnetic disk is set according to
explain. First, operate the power switch (not shown)
When power is supplied to the device, the system
Is reset and initialization is performed. At this time the picture Miyu
The output of both the circuit 14 and the audio mute circuit 20 are muted.
Initially set to When the initialization is completed,
Whether the magnetic disk is set in ep-1
The signal from the magnetic disk detection mechanism 31 to the system
This is determined by the controller 28 reading. Magnetic day
If the disc is set, move to Step-2,
Here, the system controller 28 controls the servo circuit 10.
By doing so, the DC motor driver 9 and DC motor 2
Therefore, the magnetic disk is rotated. In Step-3
50 tracks on the innermost circumference of the magnetic head or disk
The innermost track detection switch determines whether or not access is being made.
If 7 is ON, go to Step-5, otherwise
Go to Step-4 where the magnetic head is
To the inner circumference. This is the system controller 28
By controlling the motor driver 6, the
The moving motor 5 is driven and the head moving mechanism 4
It is what is performed. In other words, repeat Steps 3 and 4
As a result, the magnetic head is the innermost track (50 tracks)
Will be accessed. Access the innermost track
Then, the flow proceeds to Step-5, where the address of the RAM 30 is stored.
50 is set in the parameter N for setting. Next
The flow proceeds to Step-6, where the DC motor is ON.
If it is ON, go to Step-7.
If not, the flow branches to Step-1. Sunahachi Step
The case of proceeding to -7 means that the DC motor is turned on in Step-2.
This indicates that the magnetic disk has been set.
doing. In Step-7, the output of envelope detection 32 is switched
The empty track is read by the stem controller 28.
Information determination as to whether or not there is a lock. If it is not an empty truck, go to Step-8 and
If the answer is yes, go to Step-12. Step-8 is the playback signal
Whether the playback signal is video or not according to the signal input from the discrimination circuit 23
And if it is a video signal, proceed to Step-9.
The video signal track at address N in the RAM 20
Is set to data "11" indicating that the Reproduction signal discrimination circuit
The configuration of 23 will be described later. 20 indicates the end of writing
Therefore, the flow reaches Step-16 and ends the flow.
You. Here, the reproduction signal determination circuit 23 will be described with reference to FIG.
Will be explained. Here, the signal output from the FM demodulation circuit 12
Are connected as inputs.
Is a sync separation circuit, and the input signal is a video signal.
In this case, the sync signal is separated and output here.
You. This output signal is output from the horizontal sync counter 41 and the vertical sync
The horizontal sync counter 41 is synchronized with the vertical sync.
Configured as reset by the signal output from the separation circuit
Have been. That is, the horizontal synchronization counter 31
Signal from the horizontal sync signal to the next vertical sync signal.
Performs a count operation and counts
If the signal falls within the range, the reproduced signal is a video signal.
And outputs an "H" signal. In other words,
The image signal discriminating circuit detects the number of synchronization signals of the input signal
Thus, whether or not the image is a video is determined. Just this
Even if it is a configuration, if it is not a video signal in the video signal Step-9,
If this is the case, proceed to Step-10,
Roll information is taken in from the information signal demodulation circuit 22 and RA
Store in the table memory in M20. Then proceed to Step 11.
Here, the data indicating that this is an audio signal track
"10" is set to the memory N address. Step-12 has a flow
Going forward indicates an empty track,
Here, data “0” indicating an empty track is stored in the memory N address.
SET "0". Here, what is recorded in N tracks in the RAM 20
Information on whether it is video, audio, or empty track is SE
T will be. Next, the flow proceeds to Step-13, and it is determined whether N is 1 or not.
If it is not 1, move 1 track head to DOWN direction.
Move (Step 14) and subtract 1 from 2N in Step-15
Then, the process branches to Step-7 to perform the same operation as described above.
U. In Step-13, if N = 1, 50 traps
Information from one track to one track, RAM, or not
Since the discrimination can be executed, this is referred to
It may be used as a standard. Next, before describing the operation of the information signal demodulation circuit 22
Next, the audio recording format will be briefly described.
FIG. 4 (a) shows a track formed on a magnetic disk.
One of the recorded audio tracks is shown. Audio Trats
One track is divided into four sectors.
S ₁ , s _Two , s _Three , s _Four It is shown. Fig. 4
(B) shows an example of the sector format. One cell
The starter has a start flag at the start position,
The start signal of the sector is recorded and then
Correspondence of audio signal time axis compression rate and audio signal as code
Video signal track address and audio signal
When recording continuously over a
Track address and the next audio signal are recorded.
The track address etc.
Recorded as a roll code. In Figure 2 Step-10
Fetches this information into a table in memory
Will be. Also, as mentioned above, multiple tracks
If a continuous audio signal is recorded,
In the following, it is called one sequence of audio.
And Also, audio signals that can be completed with only a single track
This is also called one sequence for recording. Recording of the control information signal for audio reproduction described above
Next to the area, time-compressed audio is recorded.
However, the beginning of this is a continuous audio sequence between sectors.
Includes an overlap to maintain sex. sound
Behind the voice signal recording area is a signal indicating the end of the sector.
End flag is recorded. The playback control in Step-10 shown in the flow of FIG.
When loading the roll information into the memory,
Controls included in the four sectors of the track
The code is reproduced by the information signal demodulation circuit 22 and is reproduced.
Is executed by reading by the stem controller 28.
You. The information signal demodulation circuit is
Control signal is demodulated.
The timing generation circuit uses the reference signal as a reference signal.
Thus, a signal from the PG pulse generator 8 is input. Day
As a demodulation method, a signal from the PG pulse generator 8 is input.
It is empowered. The data demodulation method is PG pulse signal.
Start flag is detected for each sector based on signal
Then, from the information signal demodulation circuit 22 to the timing generation circuit 25
And demodulate the control code based on this.
Timing generator 25
Control by sending to the information signal demodulation circuit
Code demodulation is performed. Next, the operation of reproducing the video signal from the actual magnetic disk
Will be described. According to the flow shown in FIG.
When the disk is set, it automatically becomes the first from the 50th track.
When the recording information up to the track is stored in the RAM 20,
From FIG. 2 Step 16 to FIG. 5 Step-17, the RAM
Whether the data content of the address N in the address is "11", that is,
It is determined whether or not the image is a video track, and the
If so, proceed to Step 18 to monitor the status of SW3 and
Determines whether the playback mode is set, and
If not, go to Step-19 and release the video mute
Then, the reproduced video signal is output to the monitor. Flow is St
Proceed to ep-24 and end. Audio playback mode in Step-18
If is set, proceed to Step-20 and set the sound
Execute the voice playback sequence II and proceed to Step-24.
finish. If the RAM N address is not "11" in Step-17,
If so, proceed to Step-21, where the audio signal recording track
In order to determine whether or not there is, the data at RAM N
It is determined whether it is "10". If not "10"
The row branches to Step-24 and ends. If it is "10", Ste
Proceed to p-22. Here we set SW3 to set the audio playback mode.
Monitor the status to determine whether or not the
Otherwise, if the mode is not the sound reproduction mode, the flow is Step-24.
To execute the audio reproduction sequence I described later.
After that, the flow advances to Step-24, and ends. Here, the flow of the audio reproduction sequence I will be described with reference to FIG.
Will be described. In the audio sequence I (A), this is performed in Step A-1.
When access is recorded on the audio recording track
The playback control information signal is determined, and the
When the playback audio signal is accessed, it is loaded into the memory 17.
No. Next, in Step A-3, the reproduction code determined in Step A-1 is reproduced.
The corresponding video, which is the information contained in the control information signal
Track forwarding is performed based on the information of the signal track address.
U. Then, cancel the video mute, and in Step A-4,
Cancel the mute and read the audio signal
And playback of the audio starts at Step A-5.
You. Here, in Step A-1,
The beginning of the audio sequence to which the audio track belongs
From the audio playback sequence I (B).
Shown. In Step B-1, the audio transcript currently accessed
Playback control information signal recorded on the recording track
Is determined in Step B-1 according to the content of the information signal.
Determine if this is the first audio track in a sequence
You. If it is not the first audio track in the sequence,
In Step B-3, the data is added to the playback control information signal.
Included as data. The first audio tone in the audio sequence
Access the head to the rack, branch to Step B-1,
Steps B-1 and B-2 described above are repeated. Step B-1
Then, proceed to Step B-4 to retrieve the playback audio signal to memory.
And then correspond to Step A-3 described above in Step B-5
After sending a track to the video signal track
Undo mute to cancel audio mute and play audio
Is to start. Importing audio to memory
The memory shown in FIG.
The controller 24 is controlled and the timing
A / D according to the path and the output timing of the oscillation circuit 26
When the conversion circuit 16 operates, the audio data is stored in the memory 17.
This is done by importing data. Then the system
The controller 28 is included in the audio playback control information.
Based on the data signal of the time axis compression rate of the audio signal
Memory controller to control the read speed from
Control the clock signal by the oscillation circuit 27.
The audio data read from the memory according to the timing
Digital signal is converted from digital to analog and converted to noise by the audio signal processing circuit.
After processing such as slip reduction, the audio mute
It is output from the speaker after passing through the road 20.
According to the audio reproduction sequence I (B) in FIG.
When audio playback is instructed, even if continuous audio is
The track spans multiple tracks, and the head
Even if you are accessing a track that has been recorded halfway,
Play and listen to audio from the beginning of the continuous audio automatically
Can understand the recorded contents well. FIG. 7 illustrates the audio reproduction sequence II.
You. In Step C-1, the audio playback control information signal
This step is executed to determine the signal.
Prior to Step 10, at least the audio signal
Reading of the playback control information signal has been completed,
The video signal track address corresponding to each audio track address
The information data for the response is stored in RAM.
You. By Step C-1 of the audio reproduction sequence II,
The audio signal traffic corresponding to the video signal being accessed.
In order to obtain the data at address Tsuk, the data stored in RAM
Determine the raw control information signal. StepC-2 smells
While muting the video while recording the corresponding audio signal
The track is sent to access the track. StepC
-3 captures the playback audio signal into the memory, Step C-4
Then again, the video track corresponding to this audio recording track
The track is sent so that the head can be accessed. Next
Cancel the video mute at Step C-5
Is released, the sound reproduction is started, and the flow ends.
As a result, the sound is reproduced by the same operation as described above.
Will be In general, in still video formats, audio signals
The track where the number is recorded is the corresponding video track.
Is stored, but the reverse is not specified.
No. Therefore, the track that the head is playing is
If the audio playback instruction is given when the
It is not possible to play the audio track corresponding to the track.
However, according to the present embodiment, this is made possible.
There is an effect that can be. Next, Fig. 1 shows the operation when the UP and down SW of SW1 and SW2 are operated.
The rack reproduction sequence will be described with reference to FIG.
You. In the sequence described below, audio playback is performed by SW3.
For the sequence when the raw mode is set,
This section explains how to reproduce video and audio signals.
You. First, a description will be given using the flowchart of FIG. 8 (part 1).
I do. This flow chart is for each flow described above.
Program executed by a timer interrupt every 10 ms.
And operates as follows. Upsw is O in Step1-1
If N, the system controller 28 in Step 1-2
TIMER is added by 1. TIMER value is 1 in Step 1-3
If so, the process goes to Step 1-4 to perform video and audio muting. Ste
Track N accessed by p1-5 is 50 tracks.
If there is, in Step 1-6, N is incremented by one and the track is increased by one. S
In TEP1-7, the accessed track is a video signal
It is determined whether the signal is a video signal or not.
Press to cancel muting the image.
Do a Ute. In Step 1-10, the timer value is 100
It is determined whether it is smaller than
TIMER value becomes 100 because upSW is ON for 1 second
TIMER value is 100.
It goes to Step1-11, and 80 is set to TIMER.
SET. Therefore, after that, TIMER is 20 cows from 80 to 100
Flow, the flow will proceed to Step 1-5.
If the upSW is kept ON for more than 1sce,
This is done every 0.2sce. Also, Step
If upSW is no longer turned on in 1-1, step 1-12
Determine whether the track being accessed is a voice track
In the case of an audio track, the audio playback
Execute the sequence flow and if it is not an audio track
Sets TIMER to 0 in Step 1-14 and ends the flow. In other words, if you do this, operate UPsw during audio playback
If upSW is ON, that is, during fast-forward operation,
In both cases, audio playback is prohibited, and track movement is one track.
Fast-forwarding is performed at a constant speed for each click. Also
Only when the upSW is turned off, the
If the track is an audio track, an audio playback sequence
The sound is played by executing the flow of
Will be. The operation when downSW is turned on is also
Explain. FIG. 8 (part 2) NO
Shown at 1 '. The change is to check downSW in Step1'-1
And Step 1′-5 to determine whether N = 1 or not, and S
Except for N = N-1,1 track down at tep1'-6
It becomes the same flow. For the flow described below,
Only the operation of upsw will be explained, but the operation of downSW will be
The same can be applied by making the above changes. Next, the operation of upSW using the flow chart shown in FIG.
Access only the video signal recording track during fast forward
Embodiment in which the track movement is controlled so that
Will be described. In other words, the video signal is given priority
The track in the VIDEO priority playback mode
It can also be called a sequence of movement. This flow is similar to the flow of FIG.
This is the flow executed by the timer interrupt. NO.1 and
Description of the common steps is omitted. STEP2-1
If upSW is ON, add 1 to TIMER in Step2-2
Is done. If TIMER is 1 in Step 2-3, Step 2-4
No, the access track is not 50 tracks in Step 2-4
In this case, 1 is added to N, and one track is increased, and Step2-6 is performed.
Leads to. Here, it is determined whether the value of TIMER is 80 or not.
However, this is 0.2s
to determine whether or not to enter the fast forward mode for each ce
Step, if TIMER is equal to 80, fast forward
Indicates that the mode has been entered. Fast forward mode here
If not, the process proceeds to STEP 2-7, in which the video signal is muted.
The flow ends. Step 2 for fast forward mode
Go to -8, and the track accessed here is
Determine whether the track is a recording track or not, and if it is not a video recording track,
In this case, the flow proceeds to Step 2-9, and the video signal is
Then, the flow proceeds to Step 2-4, and the above flow is repeated.
You. Also, in Step 2-8, it may be a video recording track.
If determined, proceed to STEP 2-7 to mute the video signal.
Is to cancel. In other words, up in this flow
When fast forward mode is activated by holding down the SW
Access only the video recording track and decide on TIMER
Tracks are sent at predetermined time intervals, and
Tracks other than the video recording track to be accessed are skipped.
To work. By doing this upSW
Press and hold to output only the video signal to the monitor
Will be. Therefore, the audio signal is not played during fast forward.
You won't be disturbed without it. In this flow, Step 2-
Cancel the video mute in Step 2-7 without passing through
Therefore, even if it is not a track other than the video signal track,
Output to the monitor or when the track up operation is performed
In order to access only the VIDEO track, Step 2-
In Step 6, if you always branch to Step 2-8
Good. By doing this, you can move with the up operation
Tracks to be played back must be video recording tracks
Can be. <AUDIO priority playback mode (1)> Next, the UPSW operation is performed using the flowchart shown in FIG.
Depending on the operation, the head moves and the track to play is compatible
Audio signal or recorded video signal track only
Will be described. In other words,
Of the video track for which there is no audio signal recording track
No regeneration takes place. In other words, the priority is given to audio playback.
This realizes a rack feed sequence. This file
In the same manner as in the flow shown in FIGS. 8 and 9 described above,
This is a flow executed by a 10msec timer interrupt.
The description of the same steps is omitted. First, when the track feed is executed in Step 3-6, Step 3
Go to -7, the track accessed here is the video track
Is determined. In the case of video tracks,
The flow proceeds to Step 3-8, and the corresponding audio signal is transmitted in Step 3-8.
It is determined whether or not a signal recording track exists. Corresponding
If there is a recording track, proceed to Step 3-9,
Cancel Ute. The tiger accessed in Step 3-7
If the track is not a video signal recording track,
The process proceeds to step 5 and the track up operation is executed again. Ma
In Step 3-8, the recording track of the corresponding audio signal was recorded.
If does not exist, the flow branches to Step 3-5.
Thus, the one-track up operation is executed again.
That is, it is the access that the flow reaches Step 3-9.
Track is the video signal track and this video signal
Only if the corresponding audio recording track exists
Things. <AUDIO priority playback mode (No. 2)> Next, using the flowchart of FIG. 11, operating the UPSW
An embodiment in which the audio sequence is switched by
Will be explained. That is, the audio signal recorded on the recording medium is one track.
One sequence, that is, one set of audio signals
Contact may be recorded, but such audio signals
The connection of the signal could not fit in one track, and multiple tracks
In some cases, it may be recorded over a network. Hereinafter, these one group of audio signals are combined into one sequence.
In the following embodiment, the
The track accessed by the head is simply
In addition to moving to the current position, the sequence during playback
To play the next sequence of audio signals
A flow chart is disclosed. When proceeding to the next sequence, the head first
The track to be accessed is the first track in the audio sequence.
It becomes a video signal track corresponding to the clock. Below, Fig. 11
Will be described in accordance with the flow of FIG. Execute this flow
At least the audio tracks on the magnetic disk
The reading of the playback control signal has been completed,
At least the first audio sequence in each audio sequence
Address and audio sequence of the video signal track corresponding to the rack
The first track address of the license is located on the RAM shown in FIG.
It shall be stored. By the operation of UPSW, STEP4-1, STEP4-2, STEP4-
The flow proceeds to 3 and if TIMER is not 1, STE
Proceed to P4-4. Here, the recording of the sound being played at that time
The audio sequence to which the track belongs, or on a magnetic disk
Is the last recorded audio sequence,
In other words, it belongs to the audio sequence recorded on the innermost side.
Is determined. Record audio sequence
The determination of whether the track is on the outer or inner track side is made by voice sequencing.
Is determined based on the position of the top track of the
is there. In STEP4-4, the audio track belonging to the innermost side
Is determined as the final audio sequence, and ST
The flow proceeds to EP4-10. Also, the final audio sequence
If not, the flow proceeds to STEP 4-5, where
The next audio sequence, that is, the inner audio sequence
As the playback control signal for the top audio track of the
Head access to the recording track of the recorded video signal
Make At this time, it is stored in the aforementioned RAM
Refer to the content of the audio playback control signal.
You. Next, the flow moves to STEP4-6 where the video signal is sent.
The mute of the issue is released. Also, the UPSW is turned off.
For example, the flow proceeds from STEP 4-1 to STEP 4-9, where
By executing the flow of the audio playback sequence,
Playback of the sound will be started. In other words, the operation of the UPSW at this time changes the audio sequence to the next
That it functions as a switch to advance things.
Can be replaced. In addition, in FIG.
An example of the change has been described, but is described earlier with reference to FIGS. 9 and 10.
The voice sequence can be changed with DOWNSW as well.
However, the description is omitted because the description is complicated. According to the embodiment shown in FIG. 11 described above, UPSW, DO
By simply operating WNSW, the audio sequence can be changed to the next sequence.
Can be changed to a different
The track at the beginning of the sequence is played, so
Operability compared to moving the track to an adjacent track
Is greatly improved. In this embodiment, the AUDIO priority playback mode is used.
(Part 1), AUDIO priority playback mode (Part 2), and VID
Each of the EO priority playback modes is shown separately.
A switching switch is provided so that such switching can be performed
To switch between the above playback modes according to the purpose of use
It may be. In the embodiment described above, the first recording medium is used.
The disk type was used as shown in the figure.
The audio signal and the video signal are not limited to
If the medium is recorded in the presence of
A medium may be used. In the above embodiment, as shown by the dotted line in FIG.
An A / D converter field (frame) memory is
The video signal supplied to the field memory is
By using the video signal once stored,
To prevent loss of video playback during the
Can be. Also, writing video signals to such field memory
Only the timing of each video in the above-mentioned flow chart
The timing for performing the mute can be set as
If you provide a step of “video writing” instead of “
Good. If no field memory is provided, the head
Access to the audio track
Loss of video reproduction may occur due to the
As shown by the dotted line in the figure,
The video signal from the targe generator and the video muting circuit
An addition circuit that outputs an addition signal with the output is provided.
When located on the audio track, the character
For example, "Audio is being captured"
The display may be changed to a monitor. As described above, according to this embodiment, audio signals and video
The image signals are recorded on separate tracks, and the two are mixed.
The audio signal recording track even if
The live movement is operated by the track selective movement switch.
Audio playback to detect when
The timing to start is clear. Therefore,
A day where video signals and audio signals
There is an effect that a disk reproducing device can be provided. In addition, each of the playback modes described above is very different depending on the application.
Easy to use, operate UPSW and DOWNSW as in this embodiment
To perform the playback operation according to each mode.
It is extremely convenient to use. [Effect of the Invention] As described above, according to the present invention, a plurality of areas different from each other are provided.
Recording where video signal or audio signal is recorded in each area
When sequentially reproducing a plurality of video signals from a medium,
A video signal is recorded in a plurality of different areas of the recording medium.
Only the recorded area is played, and the audio signal is recorded.
Area is not played back, so the sequential playback speed of the video signal
Fast and very convenient.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 3 are block diagrams showing an embodiment of the present invention, FIG. 4 is a diagram showing a recording format of an audio signal, and FIGS. 5 is a flowchart illustrating the operation of the present embodiment. 1 ... magnetic disk 19 ... audio signal processing circuit 28 ... system controller SW1 ... UPSW SW2 ... DOWNSW

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Masahiko Ogawa               770 Shimonoge, Takatsu-ku, Kawasaki-shi Canon               Tamagawa Works Co., Ltd.                (56) References JP-A-62-95079 (JP, A)                 JP-A-49-24617 (JP, A)

Claims (1)

(57) [Claims] From a recording medium in which a video signal or an audio signal is recorded in a plurality of areas different from each other, the video signal,
An apparatus for reproducing an audio signal, comprising: a reproducing unit for reproducing a video signal and an audio signal recorded on the recording medium; and automatically transmitting a plurality of video signals recorded on the recording medium to the reproducing unit. Operation instructing means capable of instructing to sequentially and sequentially reproduce, and prior to instructing a reproducing operation in the operation instructing means, at least an area where a video signal is recorded among a plurality of areas of the recording medium. Search and hold information indicating the search result, and when automatically reproducing a plurality of video signals recorded on the recording medium in accordance with an instruction of the operation instructing means, the stored information is stored. Reproducing operation control means for controlling the reproducing means so as to sequentially reproduce only an area where a video signal is recorded among a plurality of areas of the recording medium in accordance with information indicating a search result; Playback apparatus according to claim that there were example.