JP3456011B2 - Signal playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to a compact
Disk (hereinafter referred to as “CD”) subcode channel
Video data that is played back as
A signal reproducing device suitable for applying to obtain a revision signal.
About the installation. [0002] 2. Description of the Related Art In the format of a CD, it is well known in the art.
Sub-code of one symbol (8 bits) for each frame
Is added. And each of the 8 bits is a channel
They are called P, Q, R, S, T, U, V, W. this
The subcode makes one block with 98 frames
However, since the first two frames are sub-code synchronized,
Substantially 96 frames (subcode frames), one block
Make up the lock. Here, the frame frequency is 7.3.
Since it is 5 kHz, the frame frequency of the subcode
Is 7.35 × 10^Three/ 98 = 75Hz Becomes Conventionally, a track is placed on a subcode channel P.
At the same time as time information and
Track number and INDEX for track number
CD software (hereinafter referred to as “CD-DA” software)
To the channels R to W (6 bits)
I want to record text data and graphics data
Yuru CD-G software is known. The channel Q read from the 96 frames
The signal of FIG. 13 has four fields as shown in FIG. 13A.
To achieve. In FIG. 13A, the CONTROL field
The (4 bit) part describes the information content of each track on the disc.
It is shown. ADDRESS field (4-bit
G) indicates what the contents of the DATA-Q field are
In the DATA-Q field (72
Bit) time information, track number and track number
INDEX and the like are recorded. In addition, CRC
Parity for error detection is included in the field (16 bits).
Has been recorded. [0005] The DATA-Q field contains a program area.
In the area, as shown in FIG.
G), INDEX (8 bits) for the track number,
Time information (24 bits) indicating the playing time of the track, etc.,
"00" data (8 bits), absolute time of disk, etc.
It consists of the indicated time information (24 bits). The data of channels R to W (6 bits)
Is one symbol, and as shown in FIG.
Bol is collected to form a pack, and 4 more packs
Collected into packets. That is, one subcode
One packet is composed of frames (96 symbols).
You. [0007] The symbol 0 of each pack is "MODE" and
And “ITEM” and what mode the pack is in
Indicates whether it is recorded. Currently “ZERO”
Mode, “LINE GRAPHICS” mode, “T
VGRAPHICS ”mode and“ USER ”mode
There are four types of modes. Symbol 1 is
“INSTRUCTION” and symbols 4 to 19
It shows the character of the data field up to. The symbols 2 and 3 determine the characteristics of the pack.
It is added to the two symbols 0 and 1 described above.
Parities Q0 and Q1. Also, symbols 20 to 23
Is added to 20 symbols from 0 to 19
Parity P0 to P3. The above-mentioned "TV GRAPHICS" mode
The text data and text data recorded on channels RW
The image with the raster data is displayed on the TV screen.
This is the mode for making In this mode, the font
Think of it as one basic unit. The font is shown in FIG.
As shown in B, 6 pixels in the horizontal (COLUMN) direction,
It is composed of 12 pixels in the vertical (ROW) direction. This
Here, one pixel indicates the minimum pixel that can be displayed. In this mode, a format that can be displayed on a television screen
50 fonts horizontally and 18 fonts vertically
It is. FIG. 16A shows the configuration of the display memory.
COLUMN1-48, ROW1-16
Is the SCREEN area, within the range that can actually be displayed.
is there. BORD for one font not displayed outside
There is ER. "TV GRAPHIICS" mode
Is displayed on the TV screen.
UCTION ”is“ PRESET ”as shown in FIG.
MEMORY "," PRESET BORDER ",
"WRITE FONT FOREGROUND / BA
CKROUND ”,“ SOFT SCROOOL SC
REEN, WITH PRESET ”,“ SOFT S
COOL SCREEN, WITH COPY ”,
“LOAD THE CLUT, COLOUR 0TO
  COLOUR 7 ”,“ LOAD THE CLU ”
T, COLOUR8 TO COLOUR 15 "and
And "EXCLUSIVE-OR FONWITH 2"
COLOURS ". FIG. 15A is a diagram showing a “RESET MEMOR”.
The pack structure of “Y” is shown.
MEMORY "initializes the reproduction system of channels R to W
It is mainly used at the beginning of the program area.
Horizontal screen points to set vertical and horizontal movement
And the vertical screen pointer PV
Reset to "0". Symbol 5 is 4 bits
Recorded with the value from "0" to "F" incremented by one
And specified by “COLOR” of symbol 4
All phones on display memory in color number color
Is set to be single color data. At this time
The play color number is set using the “COLOR” symbol 4.
One of the 16 colors specified. In addition, "PRESE
T MEMORY ”is overlooked due to an error
Stipulated to repeat 16 times in a row
And 16 more consecutive “PRESET MEM
Repeatedly recorded several times using the “ORY” instruction as one processing unit.
Often. FIG. 15B is a diagram showing a “PRESET BORDE”.
R shows a pack configuration.
"BORDER" is the BORDER on the display memory
All fonts in the part are “COLOR” of symbol 4
The color of the specified color number is set. FIG. 15C shows "WRITE FONTF F".
OREGROUND / BACKGROUND "Pack
1 shows the configuration. This "WRITE FONT FO
REGRUND / BACKGROUND "is a symbol
ROW address (vertical address) determined by
COLUMN address (horizontal address)
Font) of symbol 8 to symbol 19 in position
This is an instruction to write data. FIG. 15D shows "SOFT SCROLL".
SCREEN, WITH PRESET ”pack configuration
Is shown. This “SOFT SCROLL SCR
EEN, WITH PRESET ”means horizontal or vertical
Is a scroll instruction. FIG. 15E shows "SOFT SCROLL".
SCREEN, WITH COPY ”pack configuration
are doing. This pack configuration is called "SOFT SCROO
LSCREEN, WITH PRESET ”symbol
4 with “COLOR” replaced with “0000”
is there. FIG. 15F shows “LOAD THE CLU”.
T, COLOUR0-COLOUR7 "pack configuration
FIG. G shows “LOAD THE CLUT, COL”.
The pack configuration of OUR8 to COLOUR15 "is shown.
You. These packs have the color numbers described above
Or a color look-up table that indicates FIG. 15H shows “EXCLUSIVE-OR”.
  Pack structure of "FONT WITH 2COLOURS"
It shows the result. This instruction is “WRITE FON
T ”or“ PRESET MEMORY ”with 2 colors or 1
Up to 16 colors in the font written in color
It is. Here, when reproducing the CD-G software,
For example, when playing CD-G software for karaoke,
This will be described with reference to FIG. FIG. 17A shows an image displayed during normal reproduction.
FIG. 17B shows an example of an image, and FIG. 17B displays the image on a television screen.
"INSTRUCTION" is displayed. FIG. 17B
"W" stands for "WRITE FONT FOREG
ROUND / BACKGROUND "instruction," P "
"PRESET MEMORY" instruction, "E" is "EX"
CLUSIVE-OR FONT WITH 2COL
OURS ”instruction, but the number of instructions is limited to one
It is not something to be done. FIG. 17C shows a return during normal playback.
It is an example of the image displayed when performing operation | movement. FIG.
7D is the time elapsed since the start of the reproducing operation and recorded on the CD.
Absolute time (hereinafter referred to as "disc absolute time")
FIG. In FIG. 17D, solid line a
Dashed line b indicates the return operation.
This shows the case where the cropping is performed. [0021] CD-G software for karaoke is played.
Until time t1 (disc absolute time ta), "WRIT
E FONT FOREGROUND / BACKGRO
"Paint 1" (song title)
Screen) is displayed. "PRESET MEMOR
Image was preset at time t1 by Y "command
Later "WRITE FONT FOREGROUND /
“Image 2a” (Lyrics table)
Is displayed. Then, "EXCLUSIVE-O
R FONT WITH 2COLOURS ”command
As time elapses, "image 2a" becomes "image 2b"
Respond to the progress of the song from the end as shown in "Image 2c"
The colors of the lyrics are sequentially rewritten. Time point t5 (disk
In the absolute time td), as shown in "Image 2d", all parts
Rewriting of the minute is completed. At this time t5, the "PR
The ESET MEMORY ”command is executed and the image is
It is reset and "WRITE FONT FOREGR
OUND / BACKGROUND ”command
3 "(new title screen) is displayed. [0022] By the way, a disk is
Return to practice part of the lyrics repeatedly during playback
An operation may be performed. For example, during playback
A return operation is performed at t3 (disc absolute time tc),
At time t4, reproduction is started from the position of the disk absolute time tb.
Then, at time t3, rewriting to the position shown in "Image 2c"
Was performed, so that the state of "image 2c"
"EXCLUSIVE-OR" from the disk absolute time tb
The “FONT WITH 2COLOURS” instruction is executed.
It is. Therefore, the data is rewritten between time t2 and time t3.
17C, that is, the hatched portion of “image 2e” in FIG. 17C
Rewritten again. For the rest,
"EXCLUSIVE-OR Font WITH 2"
COLOURS ”instruction.
By performing a return operation, you can respond to the progress of the song.
The color of the lyrics is not sequentially changed and at time t6,
Is different from “image 2f”. In the return operation, the disk absolute time t
Assuming that playback is performed before a
For the state, "WR" related to "Paint 1" (song title picture)
ITE FONT FOREGROUND / BACKKG
"ROUND" command is executed, so the lyrics of "Picture 2c"
Is displayed on the screen with
Lyrics cannot be determined because they are written and displayed
was there. Therefore, in the present invention, the association with the display screen is made.
Signal reproduction device that can perform reliable and reliable return operation
Is provided. [0025] A signal reproducing apparatus according to the present invention.
The equipment isTime code data indicatesTime information and image switching
Information from a recording medium that records image information with data
Information reading means to be read and operation for operating the information reading means
Means and a recording medium read by the information reading means.
Image switching detection means for detecting image switching data from image information
And the image switching data is detected by the image switching detecting means.
Every time the recording medium is read by the information reading means,
Time informationThe first to rememberTime storage means,First time
A first time based on the time information stored in the storage means;
Stores time information before time information stored in storage means
A second time storage means for performing
During the return operation of the information reading means, the first time storage means
And a plurality of time information stored in the second time storage means
Read by the information reading means.
That the time information of the recorded recording medium matchesTo detect
With coincidence detecting means,Matching time information with match detection means
At the position whereReturn actionStop [0026] According to the present invention, a screen switching signal is generated during a reproducing operation.
Time information recorded on the disc when a signal is detectedTo
This time information is stored in the first time storage means.
Time information indicating a time earlier than the time indicated by the second time
Memorize in the storage means,Return initiated by switch operation
The operation is based on the operation timing of the operation switch or the operation
Time information during return operation and the stored
Time information is found to match
Is completed. For this reason, return movements such as track jumps
Even if time information cannot be read continuously during operation
Match detection with multiple time information is performed, so match detection
The function can be improved. For example, CD-G
When playing back a video,
Operation can be stopped, and
Even if the operation is started, the image switching data "PRES"
ET MEMORY ”instruction is executed and the display is preset.
Is displayed, a new table is displayed before the operation switch is operated.
Display is always normal without overwriting
Can be applied. Also applies to karaoke, etc.
As a result, operability can be greatly improved. [0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to FIG.
An example will be described. In FIG. 1, 1 is a CD-G software.
And 2 is a signal reading unit. The signal reading unit 2
It consists of an optical pickup and a servo circuit. this
The CD reproduction signal output from the signal reading unit 2 is a digital
The signal is supplied to the signal processing unit 3. In the digital signal processing section 3, signal reading is performed.
EFM demodulation and error correction for CD playback signal from unit 2
Processing and the like are performed. The digital signal processing unit 3
Audio signal SDD, subcode signal SCA and
And time code data TCD. This digital
The audio signal SDD is converted by a D / A converter (not shown).
It is converted into an analog audio signal and output. Ma
The subcode signal SCA is the subcode channel P
~ W data signal and clock signal related to subcode
And is supplied to the decoder unit 4. Ta
Imcode data TCD is stored in subcode channel Q.
It consists of recorded time information data signals.
Provided to the stem control unit 7 and the back search control unit 20
Be paid. From the decoder unit 4, the above-mentioned pack
“TV GRAPHICS” mode is set with symbol 0
Is set by the symbol 1 as described above.
According to the type of “INSTRUCTION”, each phone
R, G, B data of the image is displayed as an image signal GD.
Supplied to the memory 5. The display memory 5
The image data supplied to and stored in the
Supplied to an RGB encoder (not shown)
It is converted into a signal and output. The sub-code signal is further transmitted from the decoder unit 4.
The signal SCB is supplied to the picture top detection unit 10. This
Is set by pack symbol 1
Of "INSTRUCTION" channels R to W
Than the timing of the data signal and the output of this data signal
It consists of a slightly delayed clock signal CK1. What
Note that the data of channels R to W of "INSTRUCTION"
The output of the data signal is held for a predetermined time, and the next pack
Is reset before the signal is supplied. Here, referring to FIG.
The configuration of the output unit 10 will be described. In FIG. 2, the decoder unit 4
"INSTRU" of the subcode signal SCB supplied from the
The data signals of the channels R to W of the “C.
Is supplied to the memory control unit 11. The preset memory detector 11 supplies
The data of the channels R to W is “PRESET MEM”.
It is determined whether or not the instruction is an “ORY” instruction.
ESET MEMORY ”instruction
In this case, the judgment signal PC at the low level “L” is the judgment signal recognition.
And a preset memory counter unit supplied to the unit 12.
13 is supplied. In the decision signal recognition unit 12, the decoder unit 4
Clock signal CK of subcode signal SCB supplied from
Preset memory detector at rising edge of 1
The determination signal PC supplied from the controller 11 is recognized. here
Then, in the preset memory detecting unit 11, "PRESET M
When it is recognized that the instruction is an EMORY ”instruction,
The clear signal CLR output from the constant signal recognition unit 12 is
Level "H". Also, "PRESET ME
If it is recognized that the instruction is not a “MORY” instruction,
The “L” clear signal CLR is the period of the clock signal CK1.
Output only for a while. This clear signal CLR is preset
Memory counter 13 and picture top signal generator
14. The preset memory counter section 13
"PRESET MEMORY" using constant signal PC
The instruction count of the instruction is counted. In addition, "PRESE
Low level "L" when not TMEMORY "instruction
The clear signal CLR of the preset memory counter unit 13
And the counter is reset.
The number of consecutive SET MEMORY ”instructions is counted.
The Rukoto. By the way, "PRESET MEMOR
Y ”instruction is not overlooked due to errors
To be repeated 16 times in a row
Here, 16 times in a row to make sure that the instruction is detected
It is determined whether or not execution has been performed, but the number of determinations is 16
However, the present invention is not limited to this. This preset memory cow
"PRESET MEMORY" instruction is 1
High level "H" judgment when counted 6 times
The signal PCC is supplied to the picture top signal generator 14.
You. The picture top signal generating section 14
The determination signal PCC from the reset memory counter unit 13
The picture top signal PTS is output based on the signal. Place
In the CD-G software, "PRESET MEMO
The RY "instruction is repeated 16 times in succession as described above.
However, in order not to overlook the instruction, 16 times
The following "PRESET MEMORY" instruction is processed by
It is often recorded several times as repeated. this
Therefore, the picture top signal generation unit 14
The high-level “H” pin is determined based on the “H” determination signal PCC.
The next high level when the capture top signal PTS is output
Assuming that the determination signal PCC of “H” is not accepted,
-Until the clear signal CLR of level "L" is supplied,
The picture top signal PTS of level “H” is held
You. This picture top signal PTS is used for back search control.
It is supplied to the section 20. Next, picture top detection will be described with reference to FIG.
The operation of the unit 10 will be described. When the reproducing operation is performed, the time t11
Of the first “PRESET MEMORY” instruction
Preset memory is detected by the data of the panels R to W (FIG. 3A).
When supplied to the unit 11, the judgment signal PC (FIG. 3B) becomes low.
Level "L", but before the next instruction is supplied
Data of channels R to W are reset at time t12 and determined
The signal PC is at a high level “H”. This determination signal P
C is counted by the preset memory counter unit 13.
You. Also, the rising edge of the clock signal CK1 (FIG. 3C)
Thus, the state of the determination signal PC is recognized. In addition,
The clock signal CK1 is determined by the preset memory detector 11.
Recognition is performed after the constant signal PC becomes stable.
Signal rises slightly later than t11.
You. Here, the judgment signal PC is at the low level “L”, that is,
It is determined that the instruction is a “PRESET MEMORY” instruction.
When set, the clear signal from the judgment signal
The signal CLR (FIG. 3D) is held at the high level “H”. The 16th "PRESET MEMOR"
At time t13 when the Y "instruction is executed, the preset menu
In the memory counter 13, based on the determination signal PC, “PR
ESET MEMORY ”instruction has been counted 16 times
Is detected. Preset memory counter for this
The determination signal PCC of the high level “H” is output from the unit 13 (FIG. 3).
E) is output and the “PRESET MEMORY” command is issued.
Retained only for the duration of the order. In addition, high-level "H"
By outputting the constant signal PCC, the picture top signal
High level "H" picture top signal from the generator 14
PTS (FIG. 3F) is output and the state is maintained. Next, determination is made based on the clock signal CK1 at time t14.
When the state of the signal PC is recognized, "PRESET
  High level "H" because it is not a MEMORY "instruction
The judgment signal is recognized, and the judgment signal
The clear signal CLR of "L" is output. This loule
A picture top signal is generated by the clear signal CLR of the bell "L".
The picture top signal PTS of the raw section 14 is reset
Therefore, the level is changed from the high level “H” to the low level “L”.
Thus, from the picture top signal generation unit 14,
"PRESET MEMORY" instruction is executed 16 times
Instruction that is not “PRESET MEMORY”
Until it is executed, the picture top of high level "H"
The signal PTS is output. Next, the back search control unit 20 will be described.
Bell. In FIG. 4, the digital signal processing unit 3
Time code data TCD supplied to the
Are supplied to the time memory unit 21-0 and the comparison units 22-0 to 22-n.
Be paid. The time memory unit 21-0 stores a picture
The picture top signal PTS is supplied from the top detection unit 10.
Is done. In the time memory section 21-0, a high level
When the picture top signal PTS of “H” is supplied,
That is, the “PRESET MEMORY” instruction is repeated 16 times.
The time data of the disk absolute time when executed successively
It is memorized. The stored time data TMN-0 is
It is supplied to the im memory units 21-1 to 21-n. Time memo
In the remote unit 21-1, a predetermined value (eg,
(For example, 1 second) is subtracted and stored. That is, the time
Time data TMN-1 before data TMN-0 is stored.
You. In the time memory section 21-2, the time data TMN-0
From the time memory unit 21-1 (for example,
2 seconds) is subtracted and stored in the time memory unit 21-1.
Time data TMN-2 before the time data
You. Similarly, in the time memory unit 21-n, the time data T
From MN-0 to larger than the time memory unit 21- (n-1)
Value is subtracted and stored in the time memory unit 21- (n-1).
Time data TMN-n before the time data
It is. The time data TMN-0 is supplied to the comparing unit 22-0.
And sequentially supplied from the digital signal processing unit 3.
Time of the absolute time of the disc of the time code data TCD
Compared to data. The time data is obtained by the comparing unit 22-0.
If it is determined that they match, the high level "H" matches
The signal TMC-0 is supplied to the OR gate circuit 23. As well
And the time data TMN-1 to TMN-2 are
2-1 to 22-n, from the digital signal processing unit 3
Discs of time code data TCD supplied sequentially
Compared to time data versus time. This comparison unit 22-1 ~
If it is determined that the time data matches in 22-n, the
High level "H" match signals TMC-1 to TMC-n, respectively
Is supplied to the OR gate circuit 23. Output signal TMC from OR gate circuit 23
A is supplied to the back search switch unit 24. The back search switch unit 24 has a switch.
Switch section 9 is connected, and the return operation switch of the switch section 9 is switched.
When the switch is operated, the low level back
A search start signal BSS is supplied. This back search
The back search signal BSC is output from the switch unit 24.
You. This back search signal BSC is supplied to the delay circuit 25.
After a delay of a predetermined time τa,
1 and the flip-flop unit 26 shown in FIG.
Provided to the decoder section 4 and the system control section 7 shown in FIG.
Be paid. The flip-flop 26 has a pictograph.
Picture top signal PTS from cha top detector 10
Is supplied. From the flip-flop 26,
-Supplied with delayed back search signal BSCD of level "L"
Display, the high level "H"
The memory control signal WE is output, and then the picture top
The rising edge of the high-level "H" signal of the signal PTS
Output is reset to low level "L"
You. The display menu from the flip-flop unit 26 is displayed.
The memory control signal WE controls the switching of the switch 6 shown in FIG.
Supplied as a signal. The terminal a of the switch 6 is high.
It is pulled up to level "H" and the terminal b
The display memory rewrite control signal from the coder unit 4 is supplied.
Be paid. The movable terminal of the switch 6 is connected to the display
It is connected to the rewrite control terminal 5a of the memory 5. This switch
6 is a display memory control signal which is a switching control signal
When WE is at the high level “H”, the a side is selected.
You. For this reason, the rewrite control terminal 5 of the display memory 5
a is pulled up to high level "H" and
Rewriting of image data stored in memory 5 is prohibited.
It is. Display memory control signal WE is low level
When it is "L", the b side is selected. For this reason,
A decoder unit 4 is connected to a rewrite control terminal 5a of the display memory 5.
Is supplied from the display memory rewrite control signal,
Image data in the display memory 5 by the decoder unit 4
Is rewritten. In the decoder section 4, the back search control section 2
0 to high level "H" delayed back search signal BSC
During the period when D is supplied, the sub signal from the digital signal
The reading of the code signal SCA is stopped and the display is stopped.
Rewriting of image data in memory 5 and picture top detection
The supply of the subcode signal SCB to the output unit 10 is stopped.
You. The system control unit 7
High-level “H” delay backser
The return control signal R
The PC is supplied to the signal reading unit 2. For this reason, delay
Returns while the search signal BSCD is at the high level "H".
The operation is performed. The system control unit 7
Display unit 8 is connected and supplied from digital signal processing unit 3
Time is displayed based on the time code data TCD
Will be This example is configured as described above, and FIG.
The operation of the first embodiment will be described with reference to FIG. CD1
During playback, the time information recorded on CD1 is
From the signal processing unit 3 as time code data TCD
It is supplied to the search control unit 20. TN in FIG. 5A indicates the time information of the disk.
The numerical value indicates, for example, the absolute time of the disk.
The time point t21 (disc absolute time 24) and the time point t21 '
(Disk absolute time 34) "PRESET MEMO
The RY "instruction is executed 16 times or more. CD1
Is reproduced at time t21 and time t21 '
When the "T MEMORY" instruction is detected,
The high level "H" picture top signal PTS (FIG. 5)
B) is output. At this time, the back search control unit 20
"PRESET MEMOR" in the time memory section 21-0
The time data TMN-0 when the “Y” instruction is detected (FIG. 5)
C-0) is stored. That is, at time t21
Time data indicating "disk absolute time 24" is stored.
At time t21 ', the time indicating "disc absolute time 34"
The interim data is stored. The time memory unit 21-1 has a time memory
A predetermined value from the time data TMN-0 stored in the unit 21-0
Is subtracted from the time data TMN-1 (FIG. 5C-1) is stored.
It is. For example, at time t21, “disk absolute time 2
Time indicating "disk absolute time 23 obtained by subtracting 1 from 4"
The data is stored, and at time t21 ', "disk absolute time
When indicating "the disk absolute time 33 obtained by subtracting 1 from 34"
The interim data is stored. Similarly, the time data TMN-2
(Fig. 5C-2) and time data TMN-n (Fig. 5C-n)
Are "disc absolute time 22" and "data
Time data indicating "disk absolute time (24-n)" is stored.
At time t21 ', the "disc absolute time 32"
The time data indicating "disk absolute time (34-n)" is stored.
It is. Here, the return operation is performed at time t22.
The return operation switch of the switch section 9 is operated
And the low-level “L” back search start signal BSS
(FIG. 5D) is output. The CD having a diameter of 12 cm shown in FIG.
On a disc, signals such as music information are recorded on the disc.
FIG. 6A shows a program with a radius of 25 mm to 58 mm.
Recorded at 75 frames / s in the program area. Also, C
The rotation of the D disk is a constant linear velocity (1.2 to 1.4 m /
s), for example, a linear velocity of 1.3
m / s, one track (one rotation) is about
It is equivalent to 9 frames (about 0.12 sec)
In the outermost track, one track (one rotation) is about 21 frames
Minutes (about 0.28 sec). What
Fig. 6B shows the disc position and the frame per track.
This shows the relationship between the number of programs. Therefore, the operation is performed in the return operation.
Track jump is one track jump on the innermost side
9 frames per hit, and on the outermost side
Jumps 21 frames per track jump
Depending on the read position of the disc.
Time information TN of the disk is continuously read during
Not be performed. In FIG. 5E-0, F-0, G-0 and H-0,
Time indicating "disk absolute time 24" during return operation
Indicates the status during return operation when data is read.
You. 5E-1, F-1, G-1, and H-1 show the return operation.
During operation, time data indicating "disc absolute time 24" is read.
Time data indicating "disk absolute time 23" without being read
FIG. 5 shows a return operation in the case where is read out.
E-2, F-2, G-2, H-2 are "disc absolute time 24"
And the time data indicating "disk absolute time 23"
Time data indicating "disc absolute time 22"
5E-n, F-n, and G in FIG.
-n and H-n change from "disc absolute time 24" to "disc absolute
Time data indicating up to (24- (n-1))
Not read and indicates "disk absolute time (24-n)"
Status during return operation when time data is read
Is shown. It should be noted that, in the diagram showing the return operation described above,
It progresses from right to left in the figure as time passes. Here, the back search start signal BSS is
To the back search switch unit 24 of the
When supplied, the back search signal B of high level "H"
SC (FIGS. 5G-0 to G-n) are output. This backser
Signal BSC is supplied to the delay circuit 2 of the back search control unit 20.
5, the signal is delayed by a predetermined time τa,
As the delayed back search signal BSCD (FIG. 5H-0 to H-n)
Output. 5H-0 to H-n, the time t
The delayed back search signal B is delayed by a predetermined time τa from 22.
The time when the SCD is output is not shown. Therefore, the return operation in the signal reading section 2
Indicates that the return operation switch of the switch section 9 is turned on at time t22.
The operation is started with a delay of a predetermined time τa after the operation. What
During the return operation, the time code data TCD is not
Read continuously. Read during this return operation
The time information TBN of the time code data TCD shown in FIG.
-0 to En. During the return operation, the high level "H" is set.
Of the delayed back search signal BSCD shown in FIG.
Is supplied to the digital signal processing unit 3.
The reading of the coded signal SCA is stopped. others
During the return operation, the data in the display memory 5
It will not be rewritten and will be displayed on the screen from time t22.
The display after the elapse of the fixed time τa is held. A return operation is performed.
Of the time code data TCD read during the
The time data of the time information TBN (FIG. 5E-0) is "Disk"
When “absolute time 24” is reached, the ratio of the back search control unit 20
The time data stored in the time memory unit 21-0 by the comparing unit 22-0
Data TMN-0 (disc absolute time 24)
Is detected, and the high level is output from the OR gate circuit 23.
The "H" coincidence signal TMCA (FIG. 5F-0) is output.
The back signal is output by outputting the coincidence signal TMCA.
The back search signal BSC from the switch unit 24 (see FIG.
G-0) is set to the low level "L" and at the time t23.
At the time t24 after the elapse of the predetermined time τa
H signal BSCD (FIG. 5H-0) is at low level "L".
You. During the return operation, "disc absolute time 2
At time t25, the time data indicating "4" is not read out.
Time data indicating "disk absolute time 23" is read out.
Time data of the time information TBN (FIG. 5E-1)
When the absolute time 23 ”is reached, the comparing unit 22-1
The time data TMN-1 of the memory unit 21-1 (disc absolute time)
23) is detected, and the OR gate circuit is detected.
23 to the high level "H" coincidence signal TMCA (FIG. 5F
-1) is output. This coincidence signal TMCA
Signal BSC (FIG. 5G-1) is set to low level "L".
At the same time, a time t2 after a predetermined time τa has elapsed from the time t25.
At 6, the delayed back search signal BSCD (FIG. 5H-1) is low.
The level is set to “L”. Similarly, during the return operation, the "disk absolute"
Time indicating "time 24" and "disk absolute time 23"
At time t27, the data is not read,
The time data indicating "interval 22" is read out and the time information TB
The time data of N (FIG. 5E-2) is "disk absolute time 2
2 ”, the comparing unit 22-2 stores the time memory unit 21-2.
Same as time data TMN-2 (disc absolute time 22)
Is detected, and the high level "H" coincidence signal T
MCA (FIG. 5F-2) is output. This coincidence signal TMC
At A, the back search signal BSC (FIG. 5G-2) is low level.
"L" and a predetermined time τa from time t27.
At time t28 after the elapse, the delayed back search signal BSCD (FIG.
5H-2) is set to the low level "L". Further, during the return operation, "disc absolute
Time 24 ”to“ disc absolute time (24− (n−
1))) is not read out and time t29
Is the time data indicating "disc absolute time (24-n)"
Is read and the time data of the time information TBN (FIG. 5E-n) is read.
When the data becomes "disc absolute time (24-n)",
The comparison unit 22-n uses the time data TMN of the time memory unit 21-n.
-n (disk absolute time (24-n))
Is detected, and the high level "H" coincidence signal TMCA
(FIG. 5F-n) is output. This coincidence signal TMCA
The search signal BSC (FIG. 5G-n) is low level "L".
And after a lapse of a predetermined time τa from time t29.
At time t30, the delayed back search signal BSCD (FIG. 5H-
n) is set to the low level “L”. This delayed back search signal BSCD is low.
When the level is set to “L”, the return operation of the signal readout unit 2 is performed.
Is stopped and the reproducing operation is started again. Note that the time t
Return operation at time t30 after the elapse of a predetermined time τa from 29
Since the operation is stopped, the reproduction operation is performed at the time t21 described above.
"PRESET MEMORY" instruction was recorded
Reading of CD1 starts before the absolute time position.
It is. At time t30, the delayed back search signal BSCD
Is set to the low level “L”.
Read subcode signal SCA from digital signal processing unit 3
Is started. Note that, as shown in FIG.
The unit 26 includes the delayed back search signal BSCD and the picture
Although the top signal PTS is supplied, the delay buffer is
When the search signal BSCD is set to the low level “L”,
A high-level "H"
The play memory control signal WE (FIG. 5L) is output. This
, The switch 6 is set to the a side and the display
Rewriting of image data in the memory 5 is prohibited. Thereafter, at time t31, "PRESET ME
When a "MARY" instruction is detected, a high-level "H"
The top signal PTS (FIG. 5K) is output,
A low level “L” display is displayed from the flop-flop section 26.
The memory control signal WE is output. For this reason, the switch
When the b side is selected, the image of the display memory 5 is displayed.
Data is rewritten. Thus, from time t30
During the playback period up to time t31, the display memory 5
Since the writing operation is prohibited, the time
The display after a predetermined time τa has elapsed since t22
At time t31. Note that "disc absolute time 2"
When the time data indicating “4” is read,
The time data indicating “absolute time 24” is not read and “
When the time data indicating "disk absolute time 23" is read out,
If "disc absolute time 24" and "disc absolute time
Time data indicating "interval 23" is not read and "disk
When the time data indicating "vs. time 22" is read out
The operation from time t30 described above is performed at time t24, respectively.
The same operation is performed from time t26 and time t28. By the way, "disk absolute time 24" is shown.
Time data is not read and "disk absolute time 24"
Match is detected with time data before the time data indicating
Already, "PRESET MEMO
Before the absolute time position where the RY ”command was recorded
Since the position is set, a predetermined time has elapsed since the match was detected.
When a match is detected without elapse of τa,
Needless to say, the start operation may be ended. As described above, according to the present embodiment, the return operation
Regardless of the switch operation timing or operation time,
Return operation is stored with time information during return operation
It is detected that one of multiple time information matches
The processing is terminated after a lapse of a predetermined time. For this reason,
The time information is read continuously during the return operation by the pump.
Even if it cannot be output, the match detection with multiple time information
And the match detection function can be improved.
Reliable return operation control can be performed,
The display is always preset even if the playback operation starts again.
Therefore, the new display is overwritten on the display before the operation.
Improve operability with correct display
Can be. By the way, a part of the lyrics while playing the disc
In the return action to practice the minute repeatedly,
More effective training by clarifying the singing start point
Can practice. Therefore, FIG. 7 shows a second embodiment.
Signal reproduction that can clarify the starting point
1 shows a configuration of an apparatus. In addition, about the part corresponding to FIG.
Are denoted by the same reference numerals, and a detailed description thereof will be omitted. In FIG. 7, the output from the decoder unit 4 is
The sub-code signal SCB is
And supplied to the start point detection unit 40.
Be paid. In the start point detection unit 40,
From the data of channels R to W of the subcode signal SCB
"EXCLUSIVE-OR FONTH WITH2C
The "OLOURS" instruction is detected. As described above, a general karaoke CD
-In G software, the "PRESETEMEMORY" instruction
Therefore, after the image is preset, "WRITE FO
NT FOREGROUND / BACKGROUND "
Lyrics are displayed by command. Then, as the song progresses
Let's say “EXCLUSIVE-OR Font WITH”
  2COLOURS ”instruction to write the color of the corresponding lyrics sequentially
"EXCLUSIVE-OR FO"
NT WITH 2COLOURS ”instruction is detected continuously.
The point at which the song is issued is set as the singing start point. Here, “EXCLUSIVE-OR F
ONT WITH 2COLOURS ”instruction
When detected, it is a high level "H" pulse signal.
The start detection signal SSP is transmitted to the back search control unit 20a.
Supplied to The configuration of the back search control unit 20a is
As shown in FIG. In FIG. 8, a portion corresponding to FIG.
The same reference numerals are given to the same, and the detailed description is omitted. In FIG. 8, the digital signal processing unit 3
The supplied time code data TCD is stored in a time memory
Unit 21-0 and the comparing unit 22-0.
Remote time memory section 31, comparison section 32 and LSB
Is supplied to the shield unit 34. This start time memory section
In 31, a start point is detected from the start point detection unit 40.
The signal SSP is supplied and the start detection signal SSP
Is set to the high level “H”, the time code data
A predetermined value from the time data of the absolute time of the disc of the TCD
(For example, 5 seconds) is subtracted and stored. The comparison unit 32 includes a start time memory unit
The time data TMNS and the time code data stored in
The time data of the absolute time of the disc of the data TCD is compared.
You. It is determined that the two time data match.
And the coincidence signal TMCS of high level “H”
Is supplied to the AND gate circuit 33. The AND gate circuit 33 has a delay buffer.
The search signal BSCD is supplied and the coincidence signal TMCS
And the delayed back search signal BSCD.
Countdown start signal CDS is countdown system
It is supplied to the control unit 41. In the LSB hold section 34, as shown in FIG.
The least significant bit signal of the time code data TCD (see FIG.
9A) is held until the next data is supplied.
The held data signal (FIG. 9B) is
It is supplied to the OR gate circuit 36. Supply to delay circuit 35
The held data signal is delayed by a predetermined time τb.
(FIG. 9C) Supplied to the EOR gate circuit 36. EOR
The gate circuit 36 holds the held data and the delayed held data.
Countdown clock, which is the exclusive OR signal of the data
The signal DCK (FIG. 9D) is supplied to the countdown control unit 41.
Be paid. In the countdown control section 41 shown in FIG.
Indicates that the countdown start signal CDS is at a high level.
By being set to “H”, the countdown clock signal D
A predetermined value is subtracted from the initially set value in synchronization with CK.
It is. This subtracted value is displayed on the countdown display section 42.
Is displayed. Note that the initially set values are
The start time memory unit 31 of the point detection unit 40
It is set to be the same as the value to be subtracted from the time data.
You. In addition, the predetermined value is used as the least significant bit signal of the time data.
It is a related value. For example, start time
Absolute disk of time code data TCD in memory unit 31
Assuming that “5” is subtracted from the time data of time,
The value of the period setting is “5”. Also, time code data
Minimum bit of time data of TCD disk absolute time
If the signal is inverted every “1”, the predetermined value
Let it be "1". Referring now to FIG. 10, a second embodiment will be described.
Will be described. When you play CD1, it becomes CD1
The recorded time information is transmitted from the digital signal processing unit 3 to the time.
To the back search control unit 20a as code data TCD
Supplied. Also, the subcode channels P to
The W data signal is supplied to the picture top detection unit 10 and the star.
Is supplied to the remote point detection unit 40. The SIS of FIG. 10A is the channel of the subcode.
"INSTRUCTION" based on data from P to W
"E" indicates "EXCLUSIVE-OR FON"
TWITH 2COLOURS ”instruction,“ P ”is“ PR ”
ESET MEMORY ”instruction,“ W ”is“ WRITE ”
  FONT FOREGROUND / BACKGROOU
ND "instruction, but the number of instructions is limited to one
Not something. TN in FIG. 10B is time information of the disk.
And the numerical value indicates, for example, the absolute time of the disc.
You. Note that the time t41 (absolute time 19 of the disk) and the time t41
"PRESET ME" at 41 '(absolute time 34)
It is assumed that a “MORY” instruction is executed 16 times or more. At time t41 and time t41 when CD1 is reproduced.
"PRESET MEMORY" command is detected at 41 '
Then, as described above, the high-level "H"
The signal PTS (FIG. 10C) is
Output from At this time, the back search control unit 20a
"PRESET MEMOR" in the time memory section 21-0
The time data TMN-0 when the "Y" instruction is detected (FIG. 10)
D) is stored. For example, at the time t41, “D
The time data indicating "disk absolute time 19" is stored,
At t41 ', time data indicating "disk absolute time 34"
Is stored. At time t42, "EXCLUSIVE-
OR FONT WITH 2COLOURS ”instruction
When detected continuously, it goes to high level as described above.
The “H” start detection signal SSP (FIG. 10E)
Output from the point detection unit 40. At this time,
In the start time memory unit 31 of the search control unit 20a,
Is "EXCLUSIVE-OR FONTH WITH"
  Time data when 2COLOURS ”instruction is detected
10 is subtracted from the time data TMNS (see FIG. 10).
F). For example, at time t42, "
Time data indicating "disk absolute time (27-5)" is stored.
Is done. Here, the return operation is performed at time t43.
The return operation switch of the switch section 9 is operated
And the low-level “L” back search start signal BSS
(FIG. 10G) is output. Note that in FIG.
FIGS. 10H, J, K, and L to be described show states during the return operation.
It is shown from time to time and progresses from right to left in the figure.
It is. The back search start signal BSS is
Supplied to the back search switch unit 24 of the switch control unit 20a.
The high level "H" back search signal BSC
(FIG. 10K) is output. Also, it is delayed by a predetermined time τa.
The delayed back search signal B at the high level "H"
The SCD (FIG. 10L) is output. Note that FIG.
At a time delay τa from time t43.
The timing when the reach signal BSCD is output is not shown.
No. Therefore, the return operation in the signal readout unit 2
Is started with a delay of a predetermined time τa from the time point t43.
During the return operation, the time code data TCD is
The time information TBN (FIG. 10H) is read out discontinuously and
It is. During the return operation, the high level
The delayed back search signal BSCD of “H” is supplied to the decoder unit 4.
Data in the display memory 5
No replacement is performed, and a predetermined time τ from time t43 is displayed on the screen.
The display after elapse is retained. Also, at time t44
Time code data TCD read during turn operation
The time data of the time information TBN of “disk absolute time 1
9 ", the high level" H "coincidence signal TMC-0
(FIG. 10J) is output. According to the coincidence signal TMC-0,
Therefore, the back search signal BSC (FIG. 10K) is low level.
"L" and a predetermined time τa from time t44
At time t45 after the lapse of time, the delayed back search signal BSCD goes low.
-Level "L". This delayed back search signal BSCD is low.
When the level is set to “L”, the return operation of the signal readout unit 2 is performed.
Is stopped and the reproducing operation is started again. This playback operation
Is the “PRESET MEMOR” at the time t41 described above.
From the position before the absolute time when the Y "instruction was recorded
Reading of CD1 is started. It should be noted that “PRESET MEME” starts at time t45.
MORY ”command detected and high level“ H ”picture
Time t46 when the top signal PTS (FIG. 10N) is output
Until the display memory control signal WE (FIG. 10P)
Is set to the high level “H” so that the display memory
5 is prohibited, the time t is displayed on the screen.
The display after a predetermined time τa has elapsed since 43 is retained
Then, it is preset at time t46. Thereafter, at time t47, the reproduction operation of the return operation
Time information of time code data TCD read during operation
The time data of the report TN is "disc absolute time 22"
Starts in the comparison unit 32 of the back search control unit 20a
Time data TMNS stored in time memory unit 31
(The disk absolute time (27-5))
When the coincidence signal TMCS of high level “H” is detected,
The signal is supplied to the ND gate circuit 33. This AND gate times
From road 33, countdown timer of high level "H"
The count signal CDS (FIG. 10R) is
1 is output. The count from the EOR gate circuit 36
The down clock signal DCK (FIG. 10S) counts down.
Is supplied to the countdown control unit 41.
At 41, the predetermined value “1” is changed from the initial value “5” to the counter value.
Is sequentially subtracted in synchronization with the down-count clock signal DCK.
Countdown is performed. This countdown day
The CDD (FIG. 10T) is provided to the countdown display section 42.
It is fed and a countdown display is made. For example, time
"5" is displayed at t47 and "4" is displayed at time t48
Is done. At time t49, "0" is displayed and the song starts.
It is. Note that the countdown display is limited to numeric display.
Bar graph display or blinking display
It can be expressed as a variable period or this countdown
The display may be displayed on a television screen. Further
You can also give a countdown by voice
Of course it is. In this example, “EXCLUSIVE-O
R FONT WITH 2COLOURS ”instruction
The singing start point is the point at which it is detected successively
But the singing point is "EXCLUSIVE-OR
The "FONT WITH 2COLOURS" instruction continues
The time is not limited to the time when the
Singing to INDEX of DATA-Q field of Nell Q
And record the point instruction data,
The point at which the instruction data is detected is used as the singing start point
Is also good. As described above, according to this example, the singing start position
Is displayed on the countdown display section 42.
So you can easily grasp the timing of singing,
You can practice effectively. In the first and second embodiments described above, the data
When return operation is performed during disk playback
As mentioned above, for singing practice etc.
A search operation is also performed. Therefore, FIG.
The configuration of the signal reproducing device that can also support the search operation is described in FIG.
Show. The parts corresponding to those in FIG.
The detailed description is omitted. In FIG. 11, the system control unit
7 is connected to the forward search switch of the switch section 44.
Switch 44a or back search switch 44b is operated
Then, the high level "H" only during the switch operation period
Operation signal FBK from the system controller 7
The data is supplied to the decoder unit 4 and the flip-flop unit 43. In the decoder section 4, the high level
While the "H" operation signal FBK is supplied, the digital
Reading of the subcode signal SCA from the signal processing unit 3
Stopped. The flip-flop 43 has a picture
The picture top signal PTS is supplied from the
Supplied from the system control unit 7
High level "H" in synchronization with the fall of the production signal FBK
Display memory control signal WE supplied to switch 6
Is done. This high level "H" display memory system
The control signal WE is a rising edge of the picture top signal PTS.
Held until For this reason, the forward search switch 44
a or the back search switch 44b is operated
During the period in which the sub code signal SCA is
Since the embedding is stopped, the image in the display memory 5 is displayed.
Data is not rewritten. Also, switch operation
After the work is completed, the picture top detection unit 10 sets “PRESET ™
Until the EMORY ”command is detected, the display menu
The memory control signal WE is set to high level "H" and the switch
6 is selected, the display memory 5
Image data is not rewritten. Next, referring to FIG. 12, the operation of the third embodiment will be described.
Is described. The SIS of FIG. 12A is the same as in the second embodiment.
Based on the data signals of the subcode channels P to W
"INSTRUCTION", and TN in FIG.
Indicates the time information of the disk, and the numerical value is, for example,
Indicates time. At the time point t51, "PRES
If the ET MEMORY "command is detected,
Picture top signal PTS of high level "H" (see FIG.
12D) is output from the picture top detection unit 10. At time t52, the forward
When the switch 44a is operated, the high level "H"
Operation signal FBK is output from the system control unit 7.
And the signal search section 2 starts the forward search
Is done. At the time t53, “PRESET MEMO
The RY ”command is issued when the operation signal FBK is at a high level“ H ”.
Reading of the subcode signal SCA of the decoder unit 4
Stopped, not detected, high level "H" picture
No top signal PTS is output. When the switch operation is completed at time t54,
When the forward search in the signal reading unit 2 is completed,
Then, the operation signal FBK is set to the low level “L”. this
High level in synchronization with the fall of the operation signal FBK
The display memory control signal WE of “H” is flip-flopped.
Output from the drop unit 43. Thereafter, at time t55, "PRESET MEME"
MORY ”command detected and high level“ H ”picture
Is supplied to the flip-flop 43.
As a result, the display memory control signal WE becomes low level.
Is "L". As described above, in the forward search operation, the forward search is performed.
At time t52 when the forward search switch 44a is operated.
After the switch operation is completed, "RESET MEMOR
Until the time point t55 when the Y "command is detected, the display menu is displayed.
The image data of the memory 5 is not rewritten. this
Therefore, forward search starts after forward search starts
When the display is "PRESET MEMORY" command detected
Held until Next, the back search switch 44b is operated.
The following describes the case in which 12F and 12G are back search
Time information TN and operation signal FBK of the operating disk
Which progresses from right to left in the figure over time
It is. 12H, J, K and L show the back search operation.
“INSTRUCTION” SI during playback operation after creation
S, time information TN, picture top signal PTS and data
The display memory control signal WE is shown. At time t56, the back search of the switch unit 44 is performed.
When the switch 44b is operated, the operation of the high level “H” is performed.
The operation signal FBK is output from the system control unit 7.
At the same time, the signal search unit 2 starts a back search. When the switch operation is completed at time t57,
When the back search in the signal reading unit 2 is completed,
The production signal FBK is set to the low level “L”. This operation signal
High level "H" in synchronization with the falling edge of signal FBK
Display memory control signal WE is flip-flop section
43. Thereafter, the reproducing operation is started, and at time t58
“PRESET MEMORY” instruction is detected and goes high.
The picture top signal PTS of level “H” is flip-flopped.
Display memory control by being supplied to
The signal WE is set to the low level “L”. As described above, even in the back search operation,
Back search switch 4
After the switch operation is completed from the time t56 when the 4b is operated
When "PRESET MEMORY" command is detected
Until t58, the image data of the display memory 5 is written.
It cannot be replaced. For this reason, after the start of back search
Is displayed at the beginning of the back search "PRESET MEM
It is held until the detection of the "ORY" instruction. As described above, according to the present embodiment, the forward server
Switch or back search switch
Even display until it detects a preset position on the screen
The image data in the memory is not rewritten. this
Therefore, forward search operation or back search operation
Even if the playback operation is started again after the end,
The display at the start of the switch operation is retained until is detected.
Display, the new display is overwritten on the display before the operation
The correct display is made without any. [0111] According to the present invention, the screen is turned off during the reproducing operation.
When a conversion signal is detected, the time information recorded on the disc is
InformationIs stored in the first time storage means.
The time information indicating the time before the time indicated by the interval information is the second
Stored in the time storage means, Started with a switch operation
Return operation has the operation timing of the operation switch
Or regardless of the operation time, Time information during return operation
A plurality of time information stored in the first and second time information storage means;
At the position where it was detected that it matched any of the time information
Will be terminated. For this reason, time information is continuously transmitted during the return operation.
Even if the data cannot be read continuously, multiple time information
Since match detection is performed, the match detection function can be improved.
Can be. For example, when playing CD-G software
It is necessary to stop the return operation without malfunction
Not only can the image be cut off even if the playback operation is started again.
"PRESET MEMORY" instruction,
Since the display is executed and the display is preset, the operation switch
The new display is not overwritten on the display before the operation of
A normal screen display can always be performed. Also,
Operability is greatly improved by applying to karaoke etc.
be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a configuration of a first embodiment of a signal reproducing apparatus according to the present invention. FIG. 2 is a diagram illustrating a configuration of a picture top detection unit. FIG. 3 is a diagram illustrating an operation of a picture top detection unit. FIG. 4 is a diagram showing a configuration of a back search control unit 20. FIG. 5 is a diagram showing the operation of the first embodiment. FIG. 6 is a diagram showing a track jump operation. FIG. 7 is a diagram showing a configuration of a second embodiment of the signal reproducing apparatus according to the present invention. FIG. 8 is a diagram showing a configuration of a back search control unit 20a. FIG. 9 is a diagram illustrating generation of a countdown clock signal. FIG. 10 is a diagram showing the operation of the second embodiment. FIG. 11 is a diagram showing a configuration of a third embodiment of the signal reproducing apparatus according to the present invention. FIG. 12 is a diagram illustrating the operation of the third embodiment. FIG. 13 is a diagram illustrating a configuration of a channel Q of a subcode. FIG. 14 is a diagram illustrating a configuration of a packet, a pack, and the like. FIG. 15 is a diagram showing eight “INSTRUCTIONS” in the “TV GRAPHIICS” mode. FIG. 16 is a diagram showing a configuration of a font and a display memory. FIG. 17 is a diagram showing a conventional operation. [Description of Signs] 1 CD 2 Signal readout unit 3 Digital signal processing circuit 4 Decoder unit 5 Display memory 7 System control unit 8 Display unit 9 Switch unit 10 Picture top detection unit 20, 20a Back search control unit 40 Start point detection Unit 41 countdown control unit 42 countdown display unit 43 flip-flop unit 44 switch unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-272452 (JP, A) JP-A-7-272449 (JP, A) JP-A-58-133690 (JP, A) JP-A-6-272690 161407 (JP, A) JP-A-6-1204093 (JP, A) JP-A-4-191882 (JP, A) JP-A-3-5984 (JP, A) JP-A-63-26087 (JP, A) JP-A-63-26086 (JP, A) JP-A-62-256594 (JP, A) JP-A-62-139187 (JP, A) JP-A-60-52987 (JP, A) (JP, U) Japanese Utility Model 4-72385 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name)

Claims (1)

(57) [Claim 1] Information reading means for reading information from a recording medium on which time information indicated by time code data and image information having image switching data are recorded, and operating the information reading means Operating means for performing, image switching detection means for detecting the image switching data from the image information of the recording medium read by the information reading means, and each time the image switching data is detected by the image switching detecting means, based on the first time storage means and, the first time the time information stored in storage means for storing the time information of the recording medium which is read by the information reading means
From the time information stored in the first time storage means.
A second time storage means for storing previous time information; and a memory for reading the information read means started by the operation means.
During the turn operation, the first time storage means and the second time storage means
Time information stored in the time storage means
Time information and the information read out by the information reading means.
The and a coincidence detection means for detecting that the time information of the recording medium match, at the position matching the time information in the coincidence detection means has been detected
A signal reproducing device, wherein the return operation is stopped.