JPH06236664A - Multihead disk player - Google Patents

Abstract

PURPOSE:To transmit the same reproducing video signals to plural output channels with a time lag by repeatedly reading divided areas by plural read means and coupling and outputting the obtained divided read signals. CONSTITUTION:An area on a recording disk 1 is divided into plural areas 1 to 5, and the respective divided areas are separately read out by reading heads 10 to 14. The heads 10 to 14 repeatedly read only the alotted divided area, and repetitively output a read signal corresponding to the divided area. Video signal reproducing devices 21 to 25 reproduce divided area video signals from the respective read signals corresponding to the divided areas, and sound signal reproducing devices 31 to 35 reproduce divided area sound signals from the respective read signals. Then, the respective obtained reproducing signals are coupled in order of the divided area, and outputted through an output channel. By such constitution, the same reproducing video signals are transmitted to the plural output channels with the time lag.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-head disc player for reading information signals from a recording disc through a plurality of reading heads.

[0002]

2. Description of the Related Art CATV (Community Antenna Television) is known as a wired image transmission means for general households.
Each home subscribes to, for example, a movie specialized channel, a NEWS specialized channel, or the like owned by a CATV program production company, and receives a movie or NEWS broadcasting service supplied via a dedicated line.

Normally, a CATV broadcasting station is supposed to broadcast each program according to a preset schedule. However, the broadcast receiver does not always receive the broadcast according to the schedule time, and at this time, the desired program cannot be viewed from the beginning. Therefore, 2 more channels
There is a CATV broadcasting station which is configured by one channel, and information of the same program is transmitted to each of these two channels with a time shift. CAT like this
The V broadcasting station provides a broadcasting service for movie works and the like by using a multi-head disk player capable of sending the same reproduced video signal to each of the two channels while shifting the time.

FIG. 1 shows an example of a conventional structure of the multi-head disk player as described above. In the figure, the reading heads 3 and 4 are arranged with a spindle motor 2 that rotationally drives a recording disk 1 on which movie information and the like are recorded facing each other by 180 degrees. The reading head 3 reads the recording information recorded on the recording disk 1 and supplies the read signals to the video signal reproducing device 5 and the audio signal reproducing device 6, respectively. The video signal reproduction device 5 reproduces the video signal from the supplied read signal and outputs the video signal of channel 1. The audio signal reproducing device 6 reproduces the audio signal from the supplied read signal and outputs the audio signal of channel 1. The reading head 4 reads the recorded information recorded on the recording disk 1 and supplies the read signals to the video signal reproducing device 7 and the audio signal reproducing device 8, respectively. The video signal reproducing device 7 reproduces the video signal from the supplied read signal and outputs the video signal of channel 2. The audio signal reproducing device 8 reproduces the audio signal from the supplied read signal and outputs the audio signal of channel 2.

With the above-described structure, the reading operation is performed with the reading head 3 ahead, and after the desired time elapses, the reading operation of the reading head 4 is started. By this operation, a time difference is generated between the video / audio signal obtained on channel 1 and the video / audio signal obtained on channel 2 by the above-mentioned desired time. Here, for example, if the broadcast time of one movie work recorded on the recording disk 1 is set to 2 hours and the time difference between channel 1 and channel 2 is set to 1 hour, the receiver By selecting and receiving one of them, the movie work can be viewed from the beginning after at least one hour has passed.

By the way, in the case of a popular movie work, there is a case where the above-mentioned one-hour time difference transmission cannot meet the wishes of the receiver. In this case, there is a demand to send the data with a shorter time difference. In order to meet this demand, it is necessary to increase the number of read heads to make the transmission output multi-channel, but if the number of read heads is increased,
There is a problem that the read heads interfere with each other on the inner peripheral portion of the recording disk, which is difficult to realize due to space restrictions.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is a multi-head disk capable of transmitting the same reproduced video signal to each of a plurality of output channels with a time shift. The purpose is to provide a player.

[0008]

A disc player for transmitting an information signal read from a disc through a plurality of read heads for each of a plurality of output channels, wherein a recording region of the disc is divided into a plurality of divided regions. To each of the read heads, information reading means for repeatedly reading only the sectioned regions assigned by the read heads to obtain separate read signals from each of the read heads,
And a connection unit for transmitting a plurality of connection signals obtained by connecting the respective read signals in the order of the corresponding divided areas as the information signals through the output channel.

[0009]

The area on the recording disk is divided into a plurality of divided areas, and each of the divided areas is shared by a plurality of reading means, and each reading means repeatedly reads only this shared area to repeatedly generate a divided read signal. Then, each of the obtained divided read signals is connected according to the arrangement of the divided areas to obtain a connection signal, which is output for each output channel.

[0010]

2 and 3 show the structure of a multi-head disc player according to the present invention. In the figure, a slider 15 moves the read head 10 within the divided area 1 of the recording disk 1 in response to a slider movement signal from the servo circuit 110. The read head 10 has a sectional area 1
The recorded information is read and the read signals are supplied to the video signal reproducing device 21 and the audio signal reproducing device 31, respectively. The video signal reproducing device 21 reproduces the video signal from the supplied read signal, and the reproduced video signal thus obtained is switched to the switching circuit 10.
The input terminals a of 1 to 105 are supplied. The audio signal reproducing device 31 reproduces an audio signal from the supplied read signal, and supplies the obtained reproduced audio signal to the respective input ends a of the switching circuits 301 to 305.

The slider 16 moves the read head 11 within the sectional area 2 of the recording disk 1 in response to a slider movement signal from the servo circuit 120. The read head 11 reads the recorded information in the divided area 2 and outputs the read signal as a video signal reproducing device 22 and an audio signal reproducing device 3.
Supply to 2 respectively. The video signal reproduction device 22 reproduces the video signal from the supplied read signal, and the obtained reproduction video signal is input to each of the input terminals b of the switching circuits 101 to 105.
Supply to. The audio signal reproducing device 32 reproduces an audio signal from the supplied read signal, and supplies the obtained reproduced audio signal to the respective input terminals b of the switching circuits 301 to 305.

The slider 17 moves the read head 12 within the sectional area 3 of the recording disk 1 in response to a slider movement signal from the servo circuit 130. The read head 12 reads the recorded information in the divided area 3 and outputs the read signal to the video signal reproducing device 23 and the audio signal reproducing device 3.
Supply to 3 respectively. The video signal reproducing device 23 reproduces the video signal from the supplied read signal, and the obtained reproduced video signal is input to each of the input terminals c of the switching circuits 101 to 105.
Supply to. The audio signal reproducing device 33 reproduces the audio signal from the supplied read signal, and supplies the obtained reproduced audio signal to the respective input terminals c of the switching circuits 301 to 305.

The slider 18 moves the read head 13 within the sectional area 4 of the recording disk 1 in response to a slider movement signal from the servo circuit 140. The read head 13 reads the recorded information in the divided area 4 and outputs the read signal to the video signal reproducing device 24 and the audio signal reproducing device 3.
Supply to 4 respectively. The video signal reproduction device 24 reproduces the video signal from the supplied read signal, and the obtained reproduction video signal is input to each of the input terminals d of the switching circuits 101 to 105.
Supply to. The audio signal reproducing device 34 reproduces an audio signal from the supplied read signal, and supplies the obtained reproduced audio signal to the respective input terminals d of the switching circuits 301 to 305.

The slider 19 moves the read head 14 within the sectional area 5 of the recording disk 1 in response to a slider movement signal from the servo circuit 150. The read head 14 reads the recorded information in the divided area 5 and outputs the read signal as a video signal reproducing device 25 and an audio signal reproducing device 3.
Supply to 5 respectively. The video signal reproducing device 25 reproduces the video signal from the supplied read signal, and the obtained reproduced video signal is input to each of the input terminals e of the switching circuits 101 to 105.
Supply to. The audio signal reproducing device 35 reproduces the audio signal from the supplied read signal, and supplies the obtained reproduced audio signal to the respective input ends e of the switching circuits 301 to 305.

As described above, the read heads installed to read the adjacent divided areas on the recording disk 1 are installed at positions where the spindle motor 2 is sandwiched therebetween.
With this configuration, there is no interference between adjacent read heads. In the drawing, each reading head is linearly arranged across the spindle motor 2, but the present invention is not limited to this. At this time, the arrangement position of each read head is within a divided area assigned to each read head, and at any position on the recording disk 1 as long as the adjacent read heads do not interfere with each other. I don't care.

Here, the above-mentioned video signal reproducing devices 21 to 25 have the same function, and the configuration thereof is shown in FIG. In FIG. 4, a BPF (Band Pass Filter) 41
Extracts the video FM carrier wave containing the video signal from the supplied read signal, and extracts the video FM carrier wave from the video signal demodulation circuit 4
Supply to 2. The video signal demodulation circuit 42 performs FM demodulation on the supplied video FM carrier to extract a video signal, which is then A / D converter 43 and address decoder 44.
Supply to each. The address decoder 44 extracts track address information in one frame of the image from the supplied video signal and sends it to the control bus 250. The A / D converter 43 converts the supplied video signal into a digital video signal and supplies the digital video signal to the video memory 45. The memory control circuit 46 uses the control bus 25
A write command signal and a read command signal are supplied to the video memory 45 according to the write control command and the read control command supplied from 0. The video memory 45 is responsive to the write command signal supplied from the memory control circuit 46 for A / D
The digital video signal supplied from the converter 43 is written and stored. Furthermore, the video memory 45 is
In response to the read command signal supplied from the memory control circuit 46, the stored digital video signal is read and supplied to the D / A converter 47. D / A converter 47
Converts the supplied digital video signal into an analog signal and outputs it as a reproduced video signal. A / above
D converter 43, video memory 45, memory control circuit 46
And the D / A converter 47 has a TBC (Time B
an ase corrector circuit, which removes the jitter component contained in the video signal extracted by the video signal demodulation circuit 42 and outputs it as a reproduced video signal.

The audio signal reproducing devices 31 to 35 have the same function, and the configuration thereof is shown in FIG. In FIG. 5, a BPF (Band Pass Filter) 51 extracts an audio FM carrier including an audio signal from the supplied read signal, and supplies this to an audio signal demodulation circuit 52.
The audio signal demodulation circuit 52 performs FM demodulation on the supplied audio FM carrier wave to extract an audio signal, and outputs this as a reproduced audio signal.

The black image signal generating circuit 400 generates a black image signal for forming a black image on the entire screen and supplies it to the input terminals f of the switching circuits 101 to 105. The servo circuits 110 to 150 are provided in the read head 10.
Focus and tracking servo signals for activating the read heads 10 to 1 are generated.
Each focus and tracking adjustment mechanism of 4 (not shown)
Supply to. Further, the servo circuits 110 to 150
Supplies a slider movement signal to each of the sliders 15 to 19 for moving each read head to an arbitrary address position within the assigned divided area in response to a slider movement control command supplied from the control bus 250.

Each of the switching circuits 101 to 105 has a reproduction video signal supplied to the input terminals a to e and an input terminal f.
Of the black image signal supplied to the control bus 250
1 signals corresponding to the selection control command supplied from the CPU 1 are selected and output as reproduced video signals of channels 1 to 5, respectively. Each of the switching circuits 301 to 305 is
Of the reproduced audio signals supplied to the input terminals a to e, one reproduced audio signal corresponding to the selection control command supplied from the control bus 250 is selected and output as reproduced audio signals of channels 1 to 5, respectively. To do.

The system controller 200 is, for example,
CPU (Central Processor Unit), ROM (Read Only
Memory) and a RAM (Random Access Memory), and the like.
Various control commands are sent to the control bus 250 according to the software stored in the OM. Next, the operation of the present invention in the above configuration will be described.

6 to 9 are flowcharts showing the control operation executed by the CPU of the system controller 200 in the above-mentioned configuration, and FIG. 10 is an operation time chart according to the flowchart. First,
In response to the start of the reproducing operation (step S1), the CPU sends to the switching circuits 101 to 105 a selection control command for selectively outputting the black image signal supplied to the input terminal f thereof as a reproduced video signal (step). S2). Then C
The PU stores the parameter data of “1” in the predetermined address CHa of the RAM, “1” in CHb, “1” in CHc, “1” in CHd, and “1” in CHe (step S
3).

At this time, CHa to CHe refer to the read heads 10 to 15, and the parameter data stored in the CHa to CHe is one of the channels 1 to 5 in which the read signal from the read head is stored. It becomes the control data that indicates whether it is output by the channel. Next, the CPU reads, from each of the read heads 10 to 15, the head address on the recording disk at the start of the read operation from a predetermined address of the ROM (step S).
4). Next, in order to move each read head to this head address, a slider movement control command is sent to the servo circuits 110 to 150 (step S5), and the read heads 15 to 18 have finished moving to the head address. After detecting that, the operation is temporarily stopped (step S
6).

Next, the CPU reads the current time from a timer (not shown), determines the current time and the scheduled broadcast time of the preset schedule, and compares the current time until the current time is determined to be the same. The determination operation is continued (step S7). If it is determined in step S7 that they are the same,
The CPU includes the switching circuits 101 to 105 and the switching circuit 3.
Of 01 to 305, the selection control command for outputting the reproduction signal supplied to the input end a is sent to only one set of the switching circuits indicated by the parameter data stored in the predetermined address CHa of the RAM (step S8). . In step S8, for example, when the parameter data stored in CHa is "1", the switching circuits 101 and 301
The selection control command is supplied to only one set, so that the switching circuits 101 and 301 respectively output the reproduced video signal and the reproduced audio signal supplied to the input end a. Further, when the parameter data stored in CHa is "5", the selection control command is supplied to only one set of the switching circuits 105 and 305, whereby the switching circuits 105 and 305 are input to the input terminal a.
The reproduced video signal and the reproduced audio signal supplied to are output respectively.

Next, the CPU sends a slider movement control command to the servo circuit 110 so that the reading head 10 starts the reading operation (step S9). The read head 10 is divided from the inner peripheral side of the recording disk 1 to the divided area 1
The recorded information is read and the read signal is supplied to the video signal reproducing device 21 and the audio signal reproducing device 31. On this occasion,
The CPU reads the track address extracted by the video signal reproducing device 21 based on the read signal from the read head 10 (step S10), and determines whether this track address is the same as the start address of the divided area 2. It is determined (step S11).

When it is determined in step S11 that the addresses are the same, the CPU sends a slider movement control command to the servo circuit 120 so that the reading head 11 starts the reading operation (step S001). The reading head 11 reads the recorded information in the divided area 2 from the inner peripheral side of the recording disk 1, and supplies the obtained read signal to the video signal reproducing device 22 and the audio signal reproducing device 32. Next, the CPU selects, from among the switching circuits 101 to 105 and the switching circuits 301 to 305, the switching circuit 1 indicated by the parameter data stored in the predetermined address CHb of the RAM.
A selection control command for outputting the reproduction signal supplied to the input end b is sent to only the set (step S002). In step S002, for example, when the parameter data stored in CHb is "1", the switching circuit 10
The selection control command is supplied to only one set of 1 and 301, whereby the switching circuits 101 and 301 respectively output the reproduced video signal and the reproduced audio signal supplied to the input terminal b. Next, a slider movement control command is sent to the servo circuit 110 to move the read head 10 to the head address of the divided area 1 (step S003), and it is detected that the read head 10 has finished moving to the head address. After that, the operation is temporarily stopped (step S004). CPU
Overwrites the above-mentioned predetermined address CHa with the value obtained by adding "1" to the parameter data stored in the predetermined address CHa of the RAM as new parameter data (step S005). Next, the CPU determines whether or not the value of the parameter data stored in CHa is greater than “5” (step S006). When it is determined in step S006 that the parameter data is greater than "5", the value of the parameter data stored in CHa is forcibly set to "1" (step S007). After the end of step S007, or when it is determined in step S006 that the parameter data is not greater than "5", the process returns to step S7 and the above-described operation is repeatedly executed.

In step S11, the reading head 10
If it is determined that the track address extracted based on the read signal from the same is not the same as the start address of the divided area 2, the CPU reads the track address extracted by the video signal reproducing device 22 (step S1).
2) It is determined whether or not this track address is the same as the start address of the divided area 3 (step S13). When it is determined in step S13 that the addresses are the same, the CPU sends a slider movement control command to the servo circuit 130 so that the reading head 12 starts the reading operation (step S101). The reading head 12 reads the recorded information in the divided area 3 from the inner peripheral side of the recording disk 1, and supplies the obtained read signal to the video signal reproducing device 23 and the audio signal reproducing device 33.

Next, the CPU has switching circuits 101 to 1
05 and the switching circuits 301 to 305, a selection control command for outputting the reproduction signal supplied to the input terminal c is sent to only one switching circuit set indicated by the parameter data stored in the predetermined address CHc of the RAM. (Step S1
02). In step S102, for example, CHc
When the parameter data stored in 1 is "1", the selection control command is supplied to only one set of the switching circuits 101 and 301, which causes the switching circuits 101 and 301 to reproduce the video image supplied to the input terminal c. The signal and the reproduced audio signal are output respectively. Next, a slider movement control command is sent to the servo circuit 120 to move the read head 11 to the head address of the divided area 2 (step S103),
After detecting that the read head 11 has finished moving to the head address, the operation is temporarily stopped (step S
104). The CPU overwrites the above-mentioned predetermined address CHb with a value obtained by adding "1" to the parameter data stored in the predetermined address CHb of the RAM as new parameter data (step S105). Next, CPU
Determines whether the value of the parameter data stored in CHb is greater than "5" (step S106). If it is determined in step S106 that the parameter data is greater than "5", CH
The value of the parameter data stored in b is forcibly set to "1" (step S107). Step S107
After completion of the above, or when it is determined in step S106 that the parameter data is not greater than "5",
Returning to step S10, the above-described operation is repeatedly executed.

In step S13, the reading head 11
If it is determined that the track address extracted based on the read signal from the same is not the same as the start address of the divided area 3, the CPU reads the track address extracted by the video signal reproducing device 23 (step S1).
4) It is determined whether or not this track address is the same as the start address of the divided area 4 (step S15). When it is determined in step S15 that the addresses are the same, the CPU sends a slider movement control command to the servo circuit 140 so that the reading head 13 starts the reading operation (step S201). The reading head 13 reads the recorded information in the divided area 4 from the inner peripheral side of the recording disk 1, and supplies the obtained read signal to the video signal reproducing device 24 and the audio signal reproducing device 34.

Next, the CPU uses the switching circuits 101 to 1
No. 05 and switching circuits 301 to 305, a selection control command for outputting the reproduction signal supplied to the input terminal d is sent to only one switching circuit set indicated by the parameter data stored in the predetermined address CHd of the RAM. (Step S2
02). In step S202, for example, CHd
When the parameter data stored in 1 is "1", the selection control command is supplied to only one set of the switching circuits 101 and 301, which causes the switching circuits 101 and 301 to reproduce the video image supplied to the input terminal d. The signal and the reproduced audio signal are output respectively. Next, a slider movement control command is sent to the servo circuit 130 to move the read head 12 to the head address of the divided area 3 (step S203),
After detecting that the read head 12 has finished moving to the head address, the operation is temporarily stopped (step S
204). The CPU overwrites the above-mentioned predetermined address CHc with a value obtained by adding "1" to the parameter data stored in the predetermined address CHc of the RAM as new parameter data (step S205). Next, CPU
Determines whether the value of the parameter data stored in CHc is greater than "5" (step S206). If it is determined in step S206 that the parameter data has a value greater than “5”, CH
The value of the parameter data stored in c is forcibly set to "1" (step S207). Step S207
After completion of the above, or when it is determined in step S206 that the parameter data is not greater than "5",
Returning to step S10, the above-described operation is repeatedly executed.

In step S15, the reading head 12
If it is determined that the track address extracted based on the read signal from the same is not the same as the start address of the divided area 4, the CPU reads the track address extracted by the video signal reproducing device 24 (step S1).
6) It is determined whether or not this track address is the same as the start address of the divided area 5 (step S17). When it is determined in step S17 that the addresses are the same, the CPU sends a slider movement control command to the servo circuit 150 so that the reading head 14 starts the reading operation (step S301). The reading head 14 reads the recorded information in the divided area 5 from the inner peripheral side of the recording disk 1, and supplies the obtained read signal to the video signal reproducing device 25 and the audio signal reproducing device 35.

Next, the CPU uses the switching circuits 101 to 1
No. 05 and the switching circuits 301 to 305, a selection control command for outputting the reproduction signal supplied to the input terminal e is sent to only one switching circuit set indicated by the parameter data stored in the predetermined address CHe of the RAM. (Step S3
02). In step S302, for example, CHe
When the parameter data stored in 1 is "1", the selection control command is supplied to only one set of the switching circuits 101 and 301, which causes the switching circuits 101 and 301 to reproduce the video image supplied to the input terminal e. The signal and the reproduced audio signal are output respectively. Next, a slider movement control command is sent to the servo circuit 140 in order to move the read head 13 to the head address of the divided area 4 (step S303),
After detecting that the read head 13 has finished moving to the head address, the operation is temporarily stopped (step S
304). The CPU overwrites the above-mentioned predetermined address CHd with the value obtained by adding "1" to the parameter data stored in the predetermined address CHd of the RAM as new parameter data (step S305). Next, CPU
Determines whether the value of the parameter data stored in CHd is greater than "5" (step S306). If it is determined in step S306 that the parameter data is greater than "5", CH
The value of the parameter data stored in d is forcibly set to "1" (step S307). Step S307
After completion of the above, or when it is determined in step S306 that the parameter data is not greater than “5”,
Returning to step S10, the above-described operation is repeatedly executed.

In step S17, the reading head 13
If it is determined that the track address extracted based on the read signal from the same is not the same as the start address of the divided area 5, the CPU reads the track address extracted by the video signal reproducing device 25 (step S1).
8) It is determined whether or not this track address is the same as the outermost peripheral address of the program area of the recording disk 1 (step S19). Step S19
If the CPU determines that the addresses are the same, the CPU selects one of the switching circuits 101 to 105 at a predetermined address CHe of the RAM.
A selection control command for outputting the black image signal supplied to the input terminal f is sent to only one set of the switching circuits indicated by the parameter data stored in (step S401). Next, a slider movement control command is sent to the servo circuit 150 to move the read head 14 to the head address of the divided area 5 (step S402), and the read head 14 is moved.
After detecting that has finished moving to the start address,
The operation is temporarily stopped (step S403). CP
The U overwrites the above-mentioned predetermined address CHe with the value obtained by adding "1" to the parameter data stored in the predetermined address CHe of the RAM as new parameter data (step S404). Next, the CPU determines whether or not the value of the parameter data stored in CHe is a value larger than “5” (step S405). When it is determined in step S405 that the parameter data has a value larger than "5", the value of the parameter data stored in CHe is forcibly set to "1" (step S406). After the end of step S406, or when it is determined in step S405 that the parameter data is not greater than "5", the process returns to step S10 and the above-described operation is repeatedly executed.

As described above, in the multi-head disc player according to the embodiment of the present invention, the area on the recording disc is divided into five areas to be divided into five areas, and each of the divided areas is divided into five reading heads 10 to 10. 14 shares the readings with each other. At this time, the reading heads 10 to 14
10 repeatedly reads only this segmented region and repeatedly outputs a read signal corresponding to this segmented region as shown in FIG. The video signal reproduction devices 21 to 25 reproduce the divided area video signals from the respective read signals corresponding to the divided areas and supply them to the switching circuits 101 to 105, respectively. Each of the switching circuits 101 to 105 selects each of the above-mentioned divided area video signals in the order according to the arrangement of the divided areas on the basis of the supplied parameter data and sends it to the output channel.

For example, in FIG. 10, output channel 1
If only considering, the parameter data C of channel 1
Ha is "1" in the period of PD1, PD2 is "2", PD3 is "3", PD4 is "4", and PD5 is "5". The switching circuit 101 outputs the reproduced video signal corresponding to the divided area 1 supplied from the video signal reproducing device 21 when CHa is “1”, and reproduces the video signal when CHb is “1”. The reproduced video signal corresponding to the divided area 2 supplied from the device 22 is output. Switching circuit 10
1 performs the switching operation in the same manner as described above, and further sequentially selects and outputs each of the divided area video signals 3 to 5 corresponding to the divided areas 3 to 5.

That is, each of the reproduced signals corresponding to the divided areas 1 to 5 read and reproduced separately by the read heads 10 to 14 is connected in order of the divided areas by the switching circuit as the connecting means, and this connection is performed. The combined signal is output through the output channel. Therefore, by changing the connection start timing of the switching circuit, which is the above-mentioned connecting means, for each output channel, it is possible to provide a time difference in output for each output channel.

For example, output channel 1 in FIG.
Parameter data CHa is changed from PD1 to PD5 from "1" to "5". That is, in the output channel 1, PD1 becomes the connection start timing. On the other hand, the parameter data CHb of channel 2 is changed from "1" to "5" from PD2 to PD6. That is, in the output channel 2, the PD 2 becomes the connection start timing. Therefore, as shown in FIG. 10, the reproduced video signal output from the output channel 2 has a time difference from the reproduced video signal output from the output channel 1 by at least the reading time of the reading head 10.

11 and 12 show the construction of a multi-head disc player according to another embodiment of the present invention. In the configurations of FIGS. 11 and 12, after the read signals output from the respective read heads are connected by the switching circuit, the
A reproduction signal is obtained by the audio signal reproducing device, and the function of each block and the operation of the entire configuration are the same as those of the multi-head disc player shown in FIGS. With the configuration as shown in FIGS. 11 and 12, the number of switching circuits as connecting means can be halved compared to the configurations as shown in FIGS. 2 and 3, and the overall configuration can be simplified. Incidentally, FIG.
In the configuration of FIG. 12 and FIG. 12, there is no black image signal generator, but if necessary, this is inserted into the output of each video signal reproducing device, and the black image signal generator generates a black image signal in response to a command from the system controller 200. The generation should be controlled.

[0038]

As described above, in the multi-head disc player of the present invention, the area on the recording disc is divided into a plurality of divided areas, and each of the divided areas is divided by a plurality of reading means. The means repeatedly reads only this shared area to repeatedly generate a divided read signal, connects each of the obtained divided read signals in accordance with the arrangement of the divided areas to obtain a concatenated signal, and outputs this to each output channel. I am trying.

Therefore, according to the multi-head disc player of the present invention, it becomes possible to transmit the same reproduction signal to each of the plurality of output channels with a time shift.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a conventional multi-head disc player.

FIG. 2 is a diagram showing a configuration of a multi-head disc player according to the present invention.

FIG. 3 is a diagram showing a configuration of a multi-head disc player according to the present invention.

FIG. 4 is a diagram showing a configuration of a video signal reproducing device.

FIG. 5 is a diagram showing a configuration of an audio signal reproducing device.

FIG. 6 is a flowchart showing an operation procedure of the multi-head disc player according to the present invention.

FIG. 7 is a flowchart showing an operation procedure of the multi-head disc player according to the present invention.

FIG. 8 is a flowchart showing an operation procedure of the multi-head disc player according to the present invention.

FIG. 9 is a flowchart showing an operation procedure of the multi-head disc player according to the present invention.

FIG. 10 is a diagram showing the operation of the multi-head disc player according to the present invention.

FIG. 11 is a diagram showing a configuration of a multi-head disc player according to another embodiment of the present invention.

FIG. 12 is a diagram showing the configuration of a multi-head disc player according to another embodiment of the present invention.

[Explanation of symbols for main parts]

 10 to 14 read heads 101 to 105 switching circuit

Claims (1)

[Claims] 1. A disc player for transmitting an information signal read from a disc through a plurality of read heads for each of a plurality of output channels, wherein the read head is a divided area obtained by dividing a recording area of the disc into a plurality of divided areas. An information reading unit that assigns to each of the read heads, repeatedly reads only the divided areas assigned by the read head, and obtains separate read signals from each of the read heads; A multi-head disk player having a plurality of connection signals for transmitting the plurality of connection signals as the information signals via the output channels.