JP2844332B2 - Information playback method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reproducing information on a recording medium on which image information is recorded.

[0002]

2. Description of the Related Art Generally, a compact disk (hereinafter referred to as a CD) is used.
There is proposed a method of recording and reproducing image information as a subcode on a digital audio disc having an outer diameter of about 12 cm, which is referred to as "abbreviated". The subcode is formed of 8 bits, and a bit group forming the subcode is divided into eight channels of P, Q, R, S, T, U, V, and W. In the method of recording and reproducing image information as a subcode, as shown in FIG. 27, data corresponding to the image information has one symbol formed by six bits of channels R to W among eight bits forming a subcode. , 98 symbols are treated as one block. This 9
Two of the eight symbols are used as synchronization signals, and 24 symbols obtained by dividing the remaining 96 symbols into four are treated as the minimum unit [Pack] of data, and constitute one image processing instruction. doing.

[0003] The first symbol (hereinafter referred to as symbol 0) of the 24 symbols indicates a mode. Symbol 1 following symbol 0 indicating this mode is an instruction (INSTRUCTION) indicating the type of instruction.
It is. Symbol 2 and symbol 3 following the instruction are a parity Q which is an error correction code. Each symbol from symbol 4 to symbol 19 following the parity Q forms a data field and includes color information and the like.
Symbol 20 to symbol 23 following the data field
Each symbol up to is a parity P which is an error correction code for protecting information in the pack.

There are four types of modes: a zero mode, a line graphics mode, a TV graphics mode, and a user mode. The zero mode is a mode for, for example, performing no operation on the display screen, that is, when the user wants to keep the image as it is, and all data in the pack are zero.

The line graphics mode is a mode for displaying a description of a music or the like by providing a liquid crystal display or the like on the front of the player, for example, as shown in FIG.
88 [pixels (PIXEL)] x 24 [pixels]
The horizontal screen is configured. Note that a pixel refers to a minimum pixel that can be displayed, and is divided into six pixels in the horizontal (COLUMN) direction and one pixel in the vertical (ROW) direction.
Normally, image processing is performed for each screen constituent unit called a font (FONT) divided into two pixels.

The number of fonts that can be displayed in the line graphics mode is 48 in the horizontal direction and 2 in the vertical direction, and this is called a screen area. Then, a memory having addresses corresponding to each pixel on the screen of 50 [horizontal] × 4 [vertical] fonts obtained by adding one font to each of the upper, lower, left and right sides of the screen area for the scroll function is provided. A subcode is formed to perform the processing.
The area outside the screen area is bordered (BO)
RDER).

The TV graphics mode is a mode for displaying an image on a television screen, and a screen of 288 [pixels] × 192 [pixels] is constructed as shown in FIG. The number of fonts that can be displayed in the TV graphics mode is 48 in the horizontal direction and 16 in the vertical direction. Also in this TV graphics mode, a horizontal font obtained by adding one font to each of the upper, lower, left and right sides of the screen area is obtained.
A subcode is formed so that image processing is performed by a memory having an address corresponding to each pixel on the screen of 0 [font] × 18 [font].

Examples of the image processing command include a command to paint the entire screen in a certain color, a command to draw a picture using two colors for one font on the screen, and a command to move the entire screen vertically or horizontally. Etc.

The channel Q bits out of the 8 bits forming the subcode include time information corresponding to the track length from the start of the program area of the CD to a predetermined portion of each information data recorded. And address time data which can be used as position data indicating a recording position. Further, the bits of the channel P form data including inter-music information.

In the method of recording and reproducing image information as a sub-coat as described above, the time required for displaying one font on the screen is about 3.3 / 1000 seconds, and 48 × 16 characters are displayed. Takes about 2.5 seconds. For this reason, it is not possible to record and reproduce an image with motion, and since a maximum of 16 colors can be used in one screen, the conventional method has a drawback that the obtained reproduced image is monotonous. Atsuta.

In order to obtain a reproduced image with a variety of variations by mixing a signal corresponding to the image information recorded as the subcode with a separately generated video format signal, the image information recorded as the subcode is If there is no relationship between the separately generated video format signals, the resulting reproduced image will be uncomfortable, so it is necessary to manually adjust the timing for starting the generation of the video format signal and the signal corresponding to the image information recorded as subcode. And it was not easy to obtain a reproduced image rich in changes and without a sense of incongruity.

[0012]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and has been achieved by selectively mixing sub-image information such as characters with a partial area of main image information. An object of the present invention is to provide an information reproducing method capable of reproducing information.

[0013]

An information reproducing method according to the present invention comprises a first recording medium on which a digital audio signal is recorded, an image signal carrying main image information, an image signal carrying digital audio signal, and an image signal carrying sub-image information. An information reproducing method in a reproducing apparatus capable of reproducing a second recording medium on which mixture ratio designation information for designating a mixture ratio of main image information and sub-image information is recorded, wherein the recording medium to be reproduced is a second recording medium. If it is determined that the recording medium is the recording medium, the main image information, the sub-image information, and the mixture ratio designation information are demodulated from the read signal obtained from the second recording medium, and the main image is reproduced at the mixture ratio according to the mixture ratio designation information. It is characterized by generating an image signal in which information is mixed with sub-image information.

[0014]

FIG. 1 to FIG. 26 show an embodiment of the present invention.
This will be described in detail with reference to FIG. First, as shown in FIG. 1, a graphics mode with motion picture (GRAPHICS MODEWITH) in addition to the four modes of the conventional system, namely, a zero mode, a line graphics mode, a TV graphics mode and a user mode.
Set a code to be inserted as symbol 0 to specify (MOTION PICTURE).

The screen configuration in the graphics mode with motion picture is the same as that in the TV graphics mode, and has a load transparency control table (LOAD) configured as shown in FIG.
TRANSPARENCYCONTROL TABLE
There is an instruction called E). This load transparency control table instruction is an instruction for specifying the mode of each pixel on the screen. There are three types of modes designated by this instruction: a transparent mode, a mixed mode, and a non-transparent mode. In these three modes, a video format signal (sub-image signal) carrying sub-image information obtained by a sub-code and a video format signal carrying main image information multiplexed and recorded together with a coded information signal containing this sub-code The mixing ratio with the (main image signal) is set to different values.

Channels R to W of symbols 4 to 8 and channels R and S of symbol 9
Are codes TCB-0 to TCB designating a mode for each pixel in which each color registered as color number "0" to color number "15" is specified.
CB-15 is formed. FIG. 3 shows these codes TC
It shows the correspondence between the bit patterns B-0 to TCB-15 and each mode and the mixing ratio between the subcode image (sub image) and the moving image (main image) in each mode.

The color number "0" is changed to the color number "1".
The 16 colors up to 5 ″ can be used in the load color look-up table color 0 to color 15 (LOAD CLUT COLOUR 0 to CO 15) in the TV graphics mode.
LOUR15) instruction. The load color look-up table colors 0 to 15 have the configuration shown in FIG. 4, and set the contents of a color look-up table indicating the colors of preset color numbers or foreground / background color numbers. Instruction. It is necessary to specify 16 colors in all,
Since each color of RGB is 4 bits, two symbols are required for setting one color, and only eight colors can be set in one pack. For this reason, this instruction is divided into two instructions for respectively specifying the first eight colors and the second eight colors.

The instruction codes for the first eight colors, ie, color 0 to color 7, are "30", and the instruction codes for the second half, color 8 to color 15, are "31". For the color mixture for each color number, red is represented by the 4 bits of channels RU of even symbols assigned to the color number, and green is channels V, W following channels RU of even symbols.
And the next odd symbol channels R and S are represented by a total of 4 bits, and blue is represented by the following 4 bits of channels T to W. Therefore, there are 2 ⁴ (= 16) gray scales of each color, and RGB
Since there are three colors, it is possible to mix 16 ³ (= 4096) colors. The gray scale “0000” corresponds to the darkest state, and “1111” corresponds to the brightest state.

Further, in the TV graphics mode, a light font foreground / background (WRITE Font FOREGROUND / B)
The ACGRUND instruction is an instruction that has a configuration as shown in FIG. 5 and writes font data of the symbols 8 to 19 at the positions of the row address defined by the symbol 6 and the column address defined by the symbol 7. is there. For a pixel whose font data is "0", the color of the color number defined by "COLOR 0" is designated as the background color.
For the pixel whose font data is "1", the color of the color number defined by "color 1 (COLOR 1)" is designated as the foreground color. Also,
At this time, the sub-picture channel can be specified by the 4 bits of the channels R and S of the symbols 4 and 5. Up to 16 image channels can be specified. By specifying this image channel, 1
Six types of images can be recorded, and the desired image channel can be selected and reproduced at the time of reproduction on the side using the disc.

FIG. 6 shows a composite disc on which a digital audio signal as a coded information signal into which a subcode including image information is inserted as described above. In FIG. 1, a composite disc 20 has a first area (hereinafter, referred to as a CD area) 20 on the inner circumference side where a digital audio signal into which a subcode including sub-image information is inserted is recorded.
a and a digital audio signal in which an FM-modulated video format signal carrying main image information and a subcode including sub-image information are inserted and recorded in a superimposed manner.
(Hereinafter referred to as a video area) 20b. The video format signal contains a higher frequency component than the PCM signal, and it is necessary to increase the rotation speed of the disk when recording the signal in the video area 20b as compared to when recording the signal in the CD area 20a. As a result, as a matter of course, it is necessary to perform the reproduction in a state where the rotation speed of the disk in the video area 20b is higher than that in the CD area 20a during the reproduction. The rotation speed is the CD area 2
At 0a, the rotation speed is several hundred rpm, while in the video area 20b, the innermost circumference of the area is 2,000 and several hundred rpm, and the outermost circumference is 1,000 and several hundred rpm, which is a very high rotation speed.

A lead-in area is provided at the head of each of the CD area 20a and the video area 20b, and these lead-in areas constitute traction codes related to the recorded contents of each area, for example, each area. First and second index code groups corresponding to each area are recorded by repeating index codes indicating the start and end times of each small portion, and the audio lead-in area (CD)
The index code of the area (lead-in area) also includes type information indicating whether the disc is a composite disc.

FIG. 7 shows a disc player for reproducing the recorded information of the composite disc as described above. In FIG. 7, a disk 20 is driven to rotate by a spindle motor 21, and its recorded information is read by an optical pickup 22. The pickup 22 includes an optical system including a laser diode, an objective lens, a photodetector, etc., a focus actuator that drives the objective lens in the optical axis direction with respect to the information recording surface of the disk 20, and a beam spot emitted from the pickup 22. A tracking actuator or the like for shifting the (information detection point) in the disk radial direction with respect to the recording track is incorporated. The pickup 22 is mounted on a slider 23 movable in the radial direction of the disc.
Is driven linearly by a transmission mechanism 25 composed of, for example, a combination of a rack and a pinion, using a slider motor 24 as a drive source. Read RF output from pickup 22
The (high frequency) signal is supplied to a video format signal demodulation processing circuit 30 and a coded information signal demodulation processing circuit 31 via an RF amplifier 26.

Video format signal demodulation processing circuit 30
Has, for example, a demodulation circuit for demodulating an RF signal and converting it to a video format signal, and a memory for digitizing the demodulated video format signal and storing the digitized video signal, and reading from the video format signal and the memory output from the demodulation circuit. One of the output video format signals is selectively output according to a switching command from the system controller 32. The video format signal output from the video format signal demodulation processing circuit 30 is supplied to a video switch 33. The video format signal demodulation processing circuit 30 is provided with a separation circuit for separating and extracting the horizontal synchronization signal h, the vertical synchronization signal v, and the control data c from the demodulated video format signal. The signals h and v and the control data c are transmitted to the system controller 3.
2 and so on.

On the other hand, the coded information signal demodulation processing circuit 31
The area to be reproduced during reproduction of the composite disc (C
A selection switch 35 is provided which switches according to the D area and the video area). The switch 35 is on the a side during the reproduction of the CD area and is on the b side during the reproduction of the video area. The switching is performed in response to the switching command. In the case of a composite disc, the rotation speed of the disc is extremely different between the CD area and the video area.
(Eight to Fourteen Modura
In the video area, if the digital signal is directly superimposed on the FM-modulated video signal during recording, the EFM signal adversely affects the low-frequency component of the FM video signal. The degree is the same, but the EFM signal is a number + d with respect to the video carrier.
It is recorded with the signal level suppressed to about B.
Therefore, even if the same EFM signal is used, the frequency characteristics and the amplitude are different between when reproducing the CD area and when reproducing the video area. Therefore, by switching the signal processing system of the reproduced EFM signal between the CD area and the video area, the demodulation is performed. The system is being shared.

That is, when reproducing the CD area, the reproduction R
The F signal is an EFM signal, and the frequency characteristic of the EFM signal is compensated by an equalizer circuit 36 having a predetermined equalizing characteristic, and further amplified by an amplifier 37 with a predetermined gain. On the other hand, in the case of reproducing the video area, the reproduction RF
Only an EFM signal included in the signal together with the FM video signal is extracted by an EFM extraction circuit 38 including an LPF or the like,
The frequency characteristic is compensated by an equalizer circuit 39 having an equalizing characteristic different from that of the equalizer circuit 36, and further amplified by an amplifier 40 having a gain larger than that of the amplifier 37. Is output as an EFM signal.
During reproduction of the compact disk, the selection switch 35 is always in the state of selecting the a side.

The reproduction EFM selected by the selection switch 35
The signal is supplied to the EFM demodulation circuit 42. The EFM demodulation circuit 42 is configured to demodulate the reproduced EFM signal to obtain PCM data, that is, digital data and subcodes including, for example, time-division multiplexed audio information of both left and right channels. The digital data including the audio information output from the EFM demodulation circuit 42 is supplied to a deinterleave / interpolation circuit 43. The deinterleave / interrogation circuit 43 cooperates with the RAM 44 to restore the digital data whose order has been rearranged by the interleaving performed at the time of recording and to send the digital data to the error correction circuit 45. Is output, the error data in the output data of the error correction circuit 45 is interpolated by an average value interpolation method or the like. The error correction circuit 45 is provided with a CIRC (Cross In).
Terreave Reed Solomon Cod
e) error correction is performed to supply digital data to the deinterleave / error correction circuit 43, and, if correction is impossible, simultaneously supply an uncorrectable signal to the deinterleave / error correction circuit 43. ing.

The output data of the deinterleave and interrogation bribe 43 is output to a D / A (digital / analog) conversion circuit 46.
Supplied to The D / A conversion circuit 46 has a demultiplexer for separating digital data including time-division multiplexed left and right channel audio information from each other, and reproduces both left and right channel audio signals. The playback audio signals of both the left and right channels are LPF
(Low-pass filters) After unnecessary components are removed by 47 and 48, they are supplied to audio output terminals OUT1 and OUT2 via amplifiers 49 and 50.

On the other hand, two bits of the channels P and Q of the subcode output from the EFM demodulation circuit 42 are supplied to the system controller 32, and the channels R to W
Are supplied to the deinterleave / error correction circuit 52. In the deinterleave / error correction circuit 52, 6-bit deinterleave of channels R to W and error correction by parity Q and P are performed. Output data of the deinterleave / error correction circuit 52 is supplied to a mode / instruction decoder 53. The mode / instruction decoder 53 outputs the mode designated by the three bits of channels R to T of symbol 0 of each pack and the mode designated by the item represented by the three bits of channels U to W, and the mode of each pack. The instruction represented by the 6 bits of the channels R to W of the symbol 1 is decoded, and a signal indicating the mode and the instruction is supplied to each unit.

The deinterleave / error correction circuit 5
2 is supplied to the image memory device 55.
The image memory device 55 has 16 RAMs 56a to 56p each having an address corresponding to all pixels on the screen of 50 font width × 18 font height, and each address can store 4-bit data. Data indicating the color number of each pixel of each image channel in the output data of the deinterleave / error correction circuit 52 is detected according to the mode indicated by the output of the instruction decoder 53 and the type of instruction, and the RAMs 56a to 56p are detected. Write to the corresponding address, and use the horizontal and vertical synchronizing signals
The memory control circuit 57 sequentially reads out, in a predetermined order, one storage content corresponding to an image channel specified by data d corresponding to a key operation of the operation unit 60 among the M56a to 56p.

The data output from the image memory device 55 is stored in a color look-up table (hereinafter referred to as C
LUT) 58. The CLUT 58 is used to load, CLUT, and load the output data of the deinterleave / error correction circuit 52 according to the mode indicated by the output of the mode / instruction decoder 53 and the type of instruction.
A color 0 to color 7 instruction and a load / CLUT / color 8 to color 15 instruction are detected, and the color data corresponding to each color number is held, and from the held color data, data read from the image memory device 55 is used. And selects and outputs the color data of the color number indicated.

The output data of the CLUT 58 is R,
It consists of three data representing the level of each color signal of G and B by 4 bits. 3 representing the level of each of the R, G, and B color signals output from the CLUT 58
The two data are supplied to D / A conversion circuits 61, 62 and 63 and are converted into analog signals. The outputs of the D / A conversion circuits 61 to 63 are supplied to an analog video conversion circuit 65. The analog video conversion circuit 65 is, for example, D
/ A conversion circuits 61 to 63 output a luminance signal and 2
Two color difference signals are obtained and 90
A signal obtained by parallel-modulating two color subcarriers having a phase difference of ° is added to form a carrier chrominance signal, and the carrier chrominance signal is added to a luminance signal and synthesized, and a synchronization signal is added to the NTSC video signal. The signal is formed. D / A is performed by the analog video conversion circuit 65.
Outputs of the conversion circuits 61 to 63 are converted into video signals and transmitted.

The deinterleave / error correction circuit 5
2 is also supplied to a transparency control table (hereinafter referred to as TCT) 66. The TCT 66 detects a load TCT instruction among the output data of the deinterleave / error correction circuit 52 according to the mode indicated by the output of the mode / instruction decoder 53 and the kind of the instruction, and detects the transparency control corresponding to each color number.・ Bit TCB-
0 to TCB-15, and the held TCB-0 to TC
One of the B-15s corresponding to the color number indicated by the data read from the image memory device 55 is selected and output.

The output of the TCT 66 is supplied to the video switch 33 as a control signal. Video switch 33
In addition to the output of the TCT 66, a video format signal obtained from the subcode and output from the analog video conversion circuit 65 and a video format signal output from the video format signal demodulation processing circuit 30 are supplied.

In the video switch 33, the video format signal obtained from the sub-code is changed by the changeover switch 6
8 and is simultaneously supplied to the fixed contact y via the resistor R1. The fixed contact z of the changeover switch 68 is an open end. The changeover switch 68 is
The movable contact u is controlled by the control signal output from the TCT 66.
Is brought into contact with one of the fixed contacts x, y, z to selectively output a signal supplied to one of the fixed contacts x, y, z.

The video format signal output from the video format signal demodulation processing circuit 30 is supplied directly to the fixed contact z of the changeover switch 69 and, at the same time, to the fixed contact y via the resistor R2. Changeover switch 6
Nine fixed contacts x are open ends. The changeover switch 69 has a configuration in which the movable contact u is brought into contact with one of the fixed contacts x, y, and z by a control signal, similarly to the changeover switch 68. These changeover switches 68 and 69
Are connected to each other, and the movable contacts u of the changeover switches 68 and 69 are connected to each other. A resistor R3 is connected between the common connection point j of these movable contacts u and the ground. The video signal obtained from the subcode and the video format signal demodulation processing circuit 30 are connected to the common connection point j.
A signal obtained by mixing with the video format signal output from is output. The movable contact u of the changeover switches 68 and 69
Is in contact with the fixed contact x, the mixing ratio of the video format signal obtained from the subcode to the output video format signal of the demodulation processing circuit 30 is 100%, and when the movable contact u contacts the fixed contact z, the mixing ratio is 0%. Becomes When the movable contact u contacts the fixed contact y, the resistors R1 and R
A value of 2 is set. The signal derived from the common connection point j is supplied to the video output terminal OUT3.

In the vicinity of the movement path of the pickup 22 in the radial direction of the disc, it is detected that the beam spot emitted from the pickup 22 has reached a position corresponding to the vicinity of the boundary between the CD area and the video area on the composite disc. Is provided. The generation of this detection signal makes it possible to detect that the beam spot has reached the video area. As the position detector 70, one having a known configuration such as an optical sensor can be used. The detection signal output from the position detector 70 is supplied to the system controller 32.

The system controller 32 is constituted by a microcomputer including a processor, a ROM (Read Only Memory), a RAM and the like. The system controller 32 includes a horizontal synchronizing signal h, a vertical synchronizing signal v, control data C, bits of channels P and Q in a subcode output from the EFM demodulation circuit 42, and a disk to be reproduced from the operation unit 60. Disc designation information indicating whether the disc is a disc or a composite disc, mode designation information indicating whether the reproduction area when reproducing the composite disc is only the CD area, only the video area, or both areas are supplied. In the system controller 32, a processor processes a signal input according to a program stored in a ROM in advance, and drives each part of a video format signal demodulation processing circuit 30, a selection switch 35, and a drive circuit (not shown) for driving the spindle motor 21. (Not shown), and controls various parts such as a drive circuit 71 for driving the slider motor 24 and a display unit 72.

FIG. 8 is a block diagram showing a specific circuit example of the video format signal demodulation processing circuit 30. The RF signal from the RF amplifier 26 is demodulated into a video signal by the demodulation circuit 75, and then the axis is corrected. Circuit 76 and separation circuit 7
7 is supplied. The separation circuit 77 separates and extracts the horizontal synchronization signal h, the vertical synchronization signal v, and the control data c included in the video format signal. The time axis correction circuit 76
For example, a CCD (Charge Coupled De)
VICE), and the time axis correction is performed by changing the delay amount of the element according to the control signal from the time axis control circuit 78. The time axis control circuit 78 controls the oscillation output of a crystal oscillator (VCXO) 79 that oscillates in synchronization with, for example, the horizontal synchronization signal h separated and extracted by the separation circuit 77 and the frequency divided output thereof, and the time axis correction circuit 76. A control signal corresponding to the phase difference between the horizontal synchronizing signal and the color burst signal in the passed video signal is output. The specific configuration is disclosed in JP-A-56-102182. ing.

The time-axis-corrected video signal becomes one input of a selection switch 80 and is supplied to an A / D (analog / digital) converter 82 via an LPF (low-pass filter) 81. In the A / D converter 82, the video signal is sampled at a predetermined cycle, and the obtained sample values are sequentially converted into digital data. The output data of the A / D converter 82 is supplied to a video memory 83 such as a PAM (random access memory). As the video memory 83, a memory having a storage capacity capable of storing video information for at least one field is used. The address control and mode control of the video memory 83 are performed by a memory control circuit 84. The memory control circuit 84 includes a reference clock generation circuit 85
The data written to each address of the video memory 83 is sequentially read out by the clock from the CPU and the contents of each address of the video memory 83 are rewritten in response to the write enable signal w output from the system controller 32. Control. Video memory 8
3 is converted into an analog signal by a D / A (digital / analog) converter 86,
It becomes another input of the selection switch 80 via 87. The selection switch 80 is normally on the a side and selectively outputs a video format signal directly supplied from the time axis correction circuit 76, and switches to the b side in response to a switching command from the system controller 32. A video format signal that has passed through the video memory 83 is selectively output.

The operation of the processor in the system controller 32 having the above configuration will be described with reference to the flowchart of FIG.

It is assumed that the composite disc has already been set at the reproduction position. In this state, when a start command is issued from the operation unit 60, the processor sends a drive command to the motor drive circuit 71 to drive the slider motor 24. Then, the pickup 22 is moved to the innermost position of the disk (step S1). Pickup 2
When the processor 2 detects that the pickup 2 has reached the innermost position by a detection switch (not shown), the processor focuses the pickup 22, and then stores the index code information recorded in the audio lead-in area on the innermost periphery of the disk. Is read (step S2), and based on the read information, it is determined whether or not the disc set is a composite disc (step S3). If the disc is a compact disc, the process directly shifts to the CD play mode (step S4), and the reproduction operation is continued as long as there is no instruction for program selection or the like. Since the reproducing operation in the CD play mode is well known, the description is omitted here.

If it is determined in step S3 that the disc is a composite disc, the processor immediately accelerates the spindle motor 21 toward the maximum specified rotation speed in the video area (step S5), and at the same time, the slider motor 24
Is driven at a high speed to move the pickup 22 at a high speed in the outer peripheral direction of the disk (step S6). Thereafter, when the detection signal from the position detector 70 detects that the pickup 22 has reached the video area (step S7), the processor starts the operation of reproducing the video area (step S8). During the playback of this video area, the processor must have at least one
Control is performed to write predetermined video information for the field (or one frame) to the video memory 83. The video information to be written may be the first piece of video information, or may be specified in advance by, for example, specifying an address by operating a key on the operation unit 60.

When it is detected in step S9 that the reproduction of the video area has been completed, the processor decelerates the spindle motor 21 toward the maximum specified rotational speed in the CD area (step S10), and simultaneously rotates the slider motor 24 at a high speed. The disk drive is driven to move the pickup 22 to the disk innermost position at a high speed (step S11). When the pickup 22 detects that the pickup 22 has reached the innermost position of the disk based on the detection output of the above-described detection switch (not shown) (step S12), the processor starts the reproducing operation of the CD area (step S13). At the same time, the processor switches the selection switch 80 in the video format signal demodulation processing circuit 30 to the b side, selects the video information written in the video memory 83 at the time of reproducing the video area, makes the video output, and outputs the video information. , A still image is reproduced. When it is detected that the reproduction of the CD area has been completed by reading the information of the audio readout (step S14), the processor drives the slider motor 24 to move the pickup 22 to the home position unless there is an operation command. The disc is moved (step S15), the disc is ejected by a loading mechanism (not shown), and a series of reproducing operations is completed.

If a still image reproduction command is issued from the operation unit 60 during execution of the routine shown in the flowchart of FIG. 10 or the main routine, the processor proceeds to step S20 to determine whether or not the video area is being reproduced. Is determined. If it is determined in step S20 that the video area is not being reproduced, the processor proceeds to step S2.
The execution of the routine executed immediately before shifting to 0 is restarted. If it is determined in step S20 that the video area is being reproduced, the processor sends out the write enable signal w over the period of one field (or one frame) by the vertical synchronizing signal v, and outputs the write enable signal w for one field (or one frame). The video information of (minute) is written to the video memory 83 (step S21). Next, the processor switches the selection switch 80 to the b-side (step S22), and resumes the execution of the routine that was being executed immediately before shifting to step S20.

After the recorded information in the video area of the composite disc is reproduced in steps S1 to S9 in the above operation, the recorded information in the CD area is reproduced in steps S10 to S14. When a still image reproduction command is issued during reproduction of the video area, video information for one field (or one frame) is written into the video memory 83 in steps S20 to S22, and the video memory 8
3 is selectively output from the selection switch 80, and a still image is reproduced.

Even when a still image reproduction command is not issued during the reproduction of the video area, the video signal written in the video memory 83 during the reproduction of the video area is selectively output from the selection switch 80 during the reproduction of the CD area. Still image playback is performed.

Now, during the reproduction of the video area, the mode / instruction decoder 53 loads / CLUTs.
When the color 0 to color 7 instruction and the load CLUT are decoded, the color 8 to color 15 instruction is decoded.
8 holds color data of 16 colors designated out of 4096 colors.

Thereafter, by decoding the light font foreground / background instructions and the like, the RAMs 56a to 56a in the image memory device 55 are decoded.
Image data of 16 channels is stored in 6p. When one of the 16-channel image data is designated by data corresponding to a key operation of the operation unit 60, the designated channel image data is sequentially output from the image memory device 55 and supplied to the CLUT 58. . Then,
The color data of the color number indicated by the image data is L
Output from the UT 58. A video format signal based on the color data is output from the analog video conversion circuit 65 and supplied to the video switch 33.

Here, when the load TCT instruction is decoded, the transparency control bits TCB-0 to TCB corresponding to each color number are stored in the TCT 66.
-15 is retained. And the held TCB-0 ~
One of the TCB-15 corresponding to the color number indicated by the data read from the image memory device 55 is selectively output from the TCT 66, and the output of the TCT 66 specifies the mixing ratio in the video switch 33. Then, the mixing ratio between the video format signal output from the analog video conversion circuit 65 and the video format signal output from the video format signal demodulation processing circuit 30 is controlled in pixel units.

As a result, for example, as shown in FIG. 11, the mixing ratio of the portion corresponding to each pixel outside the region D of the image A by the video format signal output from the video format signal demodulation processing circuit 30 is 100%, Is set to 0%, and the mixing ratio of the portion corresponding to each pixel outside the area D of the image B by the video format signal output from the analog video conversion circuit 65 is set to 0%. Forming an image C obtained by combining a portion outside the region D of the image A and a portion inside the region D of the image B by setting a mixture ratio of a portion corresponding to each pixel in the region D to 100%. Can be. Therefore, as shown in FIGS. 12 (a) to 12 (c), subtitles, musical scores, and scene description are added to the moving image obtained by the video format signal recorded in the video area or the still image obtained by the video memory 83 by subcode. Etc. can be inserted.

As described above, by sequentially processing the signals read from the disk 20, it is possible to superimpose the images by the sub-codes related to the moving image obtained by the video format signal recorded by the FM modulation. Therefore, it is possible to easily obtain a reproduced image that is rich in changes and has no uncomfortable feeling.

When an image obtained by the subcode is inserted into a still image obtained by the video memory 83, the information recorded on the disk 20 is continuously read. Playback is performed sequentially with the sound in the recording order, and no uncomfortable feeling occurs. Also, by inserting data corresponding to the characters in each language into each of the image channels, the subtitles in multiple languages are recorded on a single disc. It is possible to selectively display a subtitle superimposed by a subtitle, and there is also an advantage that it is not necessary to create a master for each country.

FIG. 13 is a diagram showing another embodiment of the present invention. In this embodiment, the zero mode in the conventional system,
By setting a code to be inserted as a symbol 0 in order to designate the extended line graphics mode and the extended TV graphics mode in addition to the four types of modes, that is, the line graphics mode, the TV graphics mode, and the user mode I have.

The screen configuration in the extended line graphics mode is the same as that in the line graphics mode, and the set TCW has a configuration as shown in FIG.
(SET TRANSPARENT CONTROL
WORD) and a write command as shown in FIG.
There is an instruction called a font. The set TCW instruction is used to set each bit bl to B of the TCW represented by a total of 8 bits of channels T to W of symbol 4 and symbol 5.
7 corresponds to each of the color numbers indicating the eight colors in the line graphics mode, and the mixing ratio in the pixel for which the corresponding color number is designated by the value of each bit b1 to b7 is either 0% or 100%. This is an instruction to set the value of The write font command writes font data to a designated position in the image memory in the same manner as the write font command in the line graphics mode, and simultaneously executes the channel U of the symbols 4 and 5.
The mixing ratio at each pixel designated by the two color numbers represented by the three bits of .about.W is 0% or 100% depending on the value of each of bits T0 and T1 of channel T of symbols 4 and 5. This is an instruction to set any of the values.

The screen configuration in the extended TV graphics mode is the same as that in the TV graphics mode, and includes a command called a set TCW as shown in FIG. 16 and a command called a preset memory as shown in FIG. The set TCW instruction in the extended TV graphics mode is composed of 16 bits in the TV graphics mode in which each bit b0 to b7 of the TCW represented by a total of 16 bits of the channels T to W of the symbols 4 to 7 represents 16 colors. 0%, 1%, 1%, 1%, 1%,
This is an instruction to set to any value of 00%. The preset memory instruction also sets the mixing ratio at the pixel set to the color of the color represented by the four bits of channels T through W of symbol 4 to 0% and 100% according to the value of bit T of channel R of symbol 4. This is an instruction to set any value of%.

The image information recorded as a sub-code in the recording format as described above is obtained by setting the TCT 66 in the apparatus of FIG. 7 to the data indicating the mixing ratio by the set TCW command, the write font command, and the preset memory command to each color number. Processing can be performed by adopting a configuration in which they are held in correspondence.

In the above embodiment, the bit number of the instruction code representing the mixing ratio at each position on the two-dimensional screen formed by the video format signal is 1 or 2, but the bit number of the instruction code is 1 or 2. Any value may be used as long as it does not exceed the number of bits of the data field in one pack.

As described above, the graphic code including the image information and the instruction code representing the mixing ratio at each position on the two-dimensional screen formed by the video format signal are inserted as subcodes of the code book information signal and recorded on the recording medium. As described above, a graphic code including image information and an instruction code specifying an area on a two-dimensional screen formed by a video format signal are inserted as subcodes of a coded information signal and recorded on a recording medium. The case will be described below.

First, similarly to the system shown in FIG. 13, in addition to the four modes of the conventional system, ie, the zero mode, the line graphics mode, the TV graphics mode, and the user mode, the extended line graphics mode and the extended mode are also provided. Set the code to be inserted as symbol 0 to specify the Dido / TV graphics mode.

The screen configuration in the extended line graphics mode is the same as that in the line graphics mode, and there is an instruction called a set window (SET WINDOW) having a configuration as shown in FIG. The set window instruction in the line graphic mode is an instruction for setting a rectangular area called a "window" at a position on the screen designated by the 4 bits of channels T to W of symbol 4. In the line graphic mode, since the screen area has only two fonts in the vertical (row) direction, the entire area of the screen area is set as a window, and the position of the window in the vertical direction on the CRT display screen as shown by hatching in FIG. Only is specified. The mixing ratio is specified by two bits of the channels R and S forming the symbol 4.

The screen configuration in the extended TV graphics mode is the same as that in the TV graphics mode. An instruction called a set window having a configuration as shown in FIG. 20 is provided, and a preset memory (PRESET MEMORY) in the TV graphics mode. There is an instruction having a configuration as shown in FIG. 21 which is a modification of the instruction referred to as FIG. 21 and an instruction having a configuration as shown in FIG. 22 which is a modification of the instruction referred to as the preset border (PRESET BORDER).

The set window instruction in the extended TV graphics mode is called a “window” defined by the position on the screen designated by the symbols 6 and 7 and the position designated by the symbols 8 and 9. This is a command for setting a rectangular area. Point corresponding to the upper left corner of the window (s
The vertical position of (x, sy) is represented by ROW by the five bits of channels S to W of symbol 6, and the horizontal position of point (sx, sy) is 6 to RW of symbol 7 Column (COLUM)
N). The vertical position of the point (ex, ey) corresponding to the lower right corner of the window is represented by ROW by the five bits S to W of the symbol 8, and the horizontal position of the point (ex, ey). The position in the direction is determined by the 6 bits of R to W of the symbol 9 in a column (COLUM).
N). With this set window instruction, a window as shown by hatching in FIG. 23 is set on the display screen.

The display in the set window is made by mixing a video format signal obtained based on the subcode and a video format signal which is multiplex-recorded together with a digital signal containing the subcode, for example, after being FM-modulated. The mixing ratio is designated to one of, for example, 0%, 30%, 70%, and 100% by two bits of channels R and S of symbol 4.

The preset memory command in the extended TV graphics mode is the same as the command in the TV graphics mode, except that the color number “0” designated by the 4 bits of the channels T to W forming the symbol 4 starts with the color number “0”. One of the 16 colors up to "15" designates the color of all fonts in the memory, and the mixing ratio in the window is a value indicated by the two bits of channels R and S forming symbol 4. Is an instruction to be set.

The preset border command in the extended TV graphics mode is
As in the case of the instruction in the graphics mode, the colors of all the fonts in the border portion on the memory are represented by 16 bits from the color number “0” to the color number “15” designated by the 4 bits of the channels T to W forming the symbol 4. This is an instruction to designate one of the colors and set the mixture ratio in the window to the value indicated by the two bits of the channels R and S forming the symbol 4.

FIG. 24 shows a disc player for playing a composite disc as shown in FIG. 6 in which a digital audio signal as a coded information signal into which a subcode including image information is inserted as described above is recorded. 24, a disc 20, a spindle motor 21, a pickup 22, a slider 23, a slider motor 24, a transmission mechanism 25, an RF amplifier 26, a video format signal demodulation processing circuit 30, a coded information signal demodulation processing circuit 31, a system controller 32, Video switch 33, operation unit 6
0, position detector 70, motor drive circuit 71, display unit 72
Are connected in the same manner as in the device of FIG.

However, in the coded information signal demodulation processing circuit 31 in this example, the TC
T66 is removed and the deinterleave / error correction circuit 5
2 is also supplied to the window attribute memory device 90. The window attribute memory device 90 has a horizontal 50
A RAM 91 having addresses corresponding to all fonts on the screen of font x 18 fonts and capable of storing 2-bit data at each address, and modes and instructions indicated by the output of the mode / instruction decoder 53 Of the data output from the deinterleave / error correction circuit 52, the data indicating the position of the window and the data indicating the mixture ratio are detected, and the data corresponding to the font in the window of the RAM 91 is detected. The data corresponding to the mixing ratio 0% of the video format signal obtained by the subcode is written to the address corresponding to the font outside the window,
And a memory control circuit 9 for sequentially reading the stored contents of the RAM 91 in a predetermined order by the horizontal and vertical synchronization signals h and v.
It consists of two. This window attribute memory device 9
The output data of 0 is supplied to the switch control circuit 93. The switch control circuit 93 is configured to supply a control signal corresponding to the mixing ratio of each font indicated by the output data of the window attribute memory device 90 to the video switch 33.

In the video switch 33, the video format signal obtained from the subcode is supplied directly to the fixed contact v of the changeover switch 95, and at the same time, is supplied to the fixed contacts x and y via the resistors R4 and R5. You. The fixed contact z of the changeover switch 95 is open. The change-over switch 95 changes the movable contact t to the fixed contacts u, x, y, by the control signal output from the switch control circuit 93.
It is configured to selectively output a signal supplied to one of the fixed contacts u, x, y, and z by being brought into contact with one of the z. The video format signal from the video format signal demodulation processing circuit 30 is supplied to the changeover switch 9.
6 and the resistors R8, R
7 are supplied to the fixed contacts y and x. The fixed contact u of the changeover switch 96 is an open end. The changeover switch 96 has a configuration in which the movable contact t is brought into contact with one of the fixed contacts u, x, y, and z by a control signal, similarly to the changeover switch 95. The movable contacts t of these changeover switches 95 and 96 are connected to each other. A resistor R8 is connected between the common connection point j of these movable contacts t and the ground. A signal obtained by mixing a video format signal obtained from the subcode and a video format signal from the video format signal demodulation processing circuit 30 is derived from the common connection point j. When the movable contact t of the changeover switches 95 and 96 contacts the fixed contact u, the mixing ratio of the video format signal obtained by the subcode becomes 100%, and when the movable contact t contacts the fixed contact z, the mixing ratio becomes 0.
%. When the movable contact t contacts the fixed contact x, the mixing ratio becomes 70%, and when the movable contact t contacts the fixed contact y, the mixing ratio becomes 30%.
Is set. The signal derived from the common connection point j is supplied to the video output terminal 0UT3.

In the above configuration, if the load / CLUT / color 0 to color 7 instruction and the load / CLUT color 8 to color 15 instruction are decoded by the mode / instruction decoder 53 during reproduction of the video area, The CLUT 58 holds color data of 16 colors designated out of 4096 colors.

Thereafter, by decoding the light font foreground / background instructions, etc., the RAMs 56a to 56a in the image memory device 55 are decoded.
Image data of 16 channels is stored in 6p. When one of the 16-channel image data is designated by the data d corresponding to the key operation of the operation unit 60, the designated channel image data is sequentially output from the image memory device 55 and supplied to the CLUT 58. Then, the color data of the color number indicated by the image data is output from the CLUT 58. A video signal based on the color data is output from the analog video conversion circuit 65 and supplied to the video switch 33.

Here, when the window set instruction is decoded, the R in the window attribute memory device 90 is read.
At the address corresponding to the font outside the window designated by the window set instruction of AM91, data indicating the mixing ratio of the video format signal of 0% by the subcode is written, and at the address corresponding to the font within the window, Data indicating the mixture ratio specified by the set instruction is written. The data read from the RAM 91 of the window attribute memory 90 is supplied to the video switch 33 and the analog video conversion circuit 65
The mixing ratio of the video format signal output from the video format signal and the video format signal output from the video format signal demodulation processing circuit 30 is controlled on a font-by-font basis, and the same operation as in the apparatus of FIG.

The case where a composite disc called a CDV is used as a recording medium has been described above, but a recording medium other than a CDV can be used as a recording medium. An apparatus using a disk called LDD as a recording medium other than CDV, that is, a disk on which FM-modulated video format signals and audio signals and digital audio signals are multiplex-recorded will be described with reference to FIGS. 25 and 26. I do.

In FIG. 25, the disk 20, spindle motor 21, pickup 22, slider 23, slider motor 24, transmission mechanism 25, RF amplifier 26, video format signal demodulation processing circuit 30, coded information signal demodulation processing circuit 31, system The controller 32, the video switch 33, the operation unit 60, the position detector 70, the motor drive circuit 71, and the display unit 72 are connected in the same manner as in the device of FIG.

However, in the coded information signal demodulation processing circuit 31 in this example, the selection switch 35, the equalizer circuit 36 and the amplifier 37 are removed from the configuration of FIG. 7, and the output of the amplifier 40 is directly supplied to the EFM demodulation circuit 42. Have been. The output of the TCT 66 is one input of the selection switch 98. The output of the control data generation circuit 99 is supplied to the selection switch 98 as another input. The selection switch 98 is normally on the b side, selectively outputs the output of the control data generation circuit 99, and selectively outputs the output of the TCT 66 by switching to the a side in response to a switching command issued from the system controller 32. It is configured to be.

The control data generating circuit 99 is configured to always generate data for controlling the movable contacts u of the changeover switches 68 and 69 in the video switch 33 to contact the fixed contacts z. Therefore, only the video format signal output from the video format signal demodulation processing circuit 30 is led out to the common connection point j and recorded as a subcode unless the selection switch 98 is switched to the side a by a switching command issued from the system controller 32. There is no mixing of the video format signals by the graphic code.

The operation of the processor in the system controller 32 having the above configuration will be described with reference to the flowchart of FIG.

It is assumed that the disc 1 has already been set at the performance position. In this state, when a start command is issued from the operation unit 60, the processor sends a drive command to the motor drive circuit 71 to drive the slider motor, thereby moving the pickup 22 to the innermost position of the disk (step S1). S101). Pickup 2
When the detection switch (not shown) detects that the motor 2 has reached the innermost position, the processor performs focusing of the pickup 22, and then starts reading of a signal recorded on the disk 20 (step S1). S10
2) Based on the control data c output from the video format signal demodulation processing circuit 30, it is determined whether or not a graphic code is recorded as a subcode of the digital audio signal recorded together with the video format signal (step S103).

If no graphic code is recorded, the processor operates in the normal play mode (step S1).
04) and the reproduction operation is continued as it is. Since the operation in the normal play mode is well known, the description thereof is omitted here.

If a graphic code has been recorded, the processor determines whether or not a superimpose command has been issued from the operation unit 60 (step S1).
05). If it is determined in step S105 that the superinvoke command has not been issued, the processor proceeds to step S104. When it is determined in step S105 that the superimpose command has been issued, the processor determines whether or not a special reproduction command has been issued from the operation unit 60 (step S10).
6). If it is determined in step S106 that the special reproduction command has not been issued, the processor switches the selection switch 98 to the a side to insert an image based on the graphic code into the moving image based on the video format signal from the video format signal demodulation processing circuit 30. (Step S107).

After execution of step S107, the processor determines whether or not the superimpose command is continuously issued from the operation unit 60 (step S108). If it is determined in step S108 that the superimpose designation has been continuously issued, the processor proceeds to step S107 again. When it is determined in step S108 that the superimpose command has not been issued, the processor switches the selection switch 98 to the b side to stop the insertion of the image by the graphic code into the moving image, and performs the same operation as in the normal play mode. A reproduction operation is performed (step S109), and step S1 is performed again.
Shift to 03.

If it is determined in step S106 that the special reproduction command has been issued, the processor determines whether the disk 20 is a CAV (constant angular velocity) disk according to the control data c output from the video format signal demodulation processing circuit 30. (Step S11)
0). In step S110, the disk 20 has a CAV
If it is determined that the disk is not a (constant angular velocity) disk, the processor determines that the disk 20 is a CLV (constant linear velocity) disk and controls each unit so that a still image is reproduced using the video memory 83 ( Step S11
1) The selection switch 98 is switched to the side a so that the graphic code image is inserted into the still image based on the video format signal from the video format signal demodulation processing circuit 30 (step S112). Note that the still image reproduction using the video memory 83 in step S111 is performed for one field (or one field) by the vertical synchronization signal v.
A write enable signal w is transmitted over a period of one frame to write one field (or one frame) of video information into the video memory 83, and the selection switch 80
Is switched to the b side.

After the execution of step S112, the processor determines whether or not the superimpose command has been continuously issued (step S113). Step S113
If it is determined in step S that the superimpose command is continuously issued, the processor returns to step S
Move to 112. If it is determined in step S113 that the superimpose command has not been issued,
The processor switches the selection switch 98 to the b side to stop the insertion of the graphic code into the still image and repeatedly determines whether or not the special reproduction command is continuously issued (step S114). When it is determined that the reproduction command has not been issued, the selection switch 80 is switched to the side a so that normal reproduction is performed (step S115), and the process returns to step S103.

On the other hand, if it is determined in step S110 that the disk 20 is a CAV (constant angular velocity) disk, the processor uses the control data c output from the video format signal demodulation processing circuit 30 to convert the graphic code for one screen. It is repeatedly determined whether or not the image data has been read (step S116). When the graphic code for one screen is read, an image corresponding to the graphic code is reproduced in the control data c output from the video format signal demodulation processing circuit 30. It is determined whether or not position information is included (step S117). If it is determined in step S117 that the image reproduction position information is included, the processor drives the motor drive circuit 71
To move the information reading beam of the pickup 22 to the position indicated by the image reproduction position information (step S118), and the information reading light of the pickup 22 every time the disk 20 rotates once. The still image reproducing operation by jumping the spot by one track is started (step S119).

If it is determined in step S117 that the image reproduction position information is not included, the processor sends a drive command to the motor drive circuit 71 to change the information reading beam of the pickup 22 for one screen. After moving to the vicinity of the graphic code recording start position (step S120), the process proceeds to step S119.

After execution of step S119, the processor switches the selection switch 98 to the side a so that the graphic code image is inserted into the still image based on the video format signal from the video format signal demodulation processing circuit 30 (step S121). Then, it is determined whether or not the superinvoke command is continuously issued (step S122). If it is determined in step S122 that the superimpose command has been continuously issued, the processor proceeds to step S121 again. If it is determined in step S122 that the super-in pause command has not been issued, the processor switches the selection switch 98 to the b-side to stop the insertion of the graphic code image into the still image and continue the special reproduction command. It is determined whether or not the image has been issued repeatedly (step S123). When it is determined that the special reproduction command has not been issued, the still image reproduction operation by the one-track jump is stopped and the normal reproduction is performed. After that (step S124), the process returns to step S103.

If the superimpose command by the key operation of the operation unit 60 is not issued in step S105 in the above operation, even if the graphic code is recorded, the process proceeds to step S104 to execute the normal reproduction operation. Therefore, the insertion of the image by the graphic code into the image based on the video format signal recorded by the FM modulation is regarded as when the superimpose command is issued by the key operation of the operation unit 60.

Next, when a special reproduction command is issued by a key operation of the operation unit 60, in the case of a CLV disc, the video format signal FM-modulated and recorded in the video memory in steps S106 and S110 to S113. After one field (or one frame) has been written, it is read out repeatedly to reproduce a still image and to continuously read the information recorded on the disk, and to use the video format signal written in the video memory. An image by a graphic code which is sequentially reproduced in the recording order is inserted into the still image.

In the case of a CAV disk, a still image based on a video format signal FM-modulated and recorded near the position specified in steps S110 and S116 to S122 or near the recording start position of a graphic code for one screen. An image by a graphic code for one screen is inserted.

If a special reproduction command is not issued by a key operation of the operation unit 60, steps S107 to S107 are executed.
An image by a graphic code is inserted into a moving image based on a video format signal recorded by being FM-modulated by 109.

[0090]

As described above, according to the information reproducing method of the present invention, when it is determined that the recording medium to be reproduced is the second recording medium, the main information is read from the read signal obtained from the second recording medium. By demodulating the image information, the sub-image information, and the mixture ratio designation information, and generating an image signal in which the main image information is mixed with the sub-image information at a mixture ratio according to the mixture ratio designation information, the sub-image information such as characters can be obtained. Selective mixing with a partial area of the main image information enables good reproduction.

[Brief description of the drawings]

FIG. 1 is a diagram showing types of recording modes in the present invention.

FIG. 2 is a diagram showing a configuration of a load transparency control table instruction.

FIG. 3 is a diagram showing a correspondence between a TCB bit pattern and a mixing ratio.

FIG. 4 is a diagram showing a load color look-up table color 0 to color 7 instruction.

FIG. 5 is a diagram showing a configuration of a light font foreground / background instruction.

FIG. 6 is a view showing a recording area of a composite disc.

FIG. 7 is a block diagram showing a reproducing apparatus for reproducing a recording medium using the information reproducing method according to one embodiment of the present invention.

8 is a block diagram showing a specific configuration example of a video format signal demodulation processing circuit 30 in the device of FIG.

FIG. 9 is a flowchart showing an example of the operation of the processor in the system controller 32 of the apparatus in FIG. 7;

FIG. 10 is a flowchart showing another example of the operation of the processor in the system controller 32 of the apparatus shown in FIG. 7;

FIG. 11 is a view showing an example of an image obtained by the apparatus shown in FIG. 7;

FIG. 12 is a view showing another example of an image obtained by the apparatus of FIG. 7;

FIG. 13 is a diagram showing types of recording modes in another embodiment of the present invention.

FIG. 14 is a diagram showing a configuration of a set TCW instruction.

FIG. 15 is a diagram showing a configuration of a light font instruction.

FIG. 16 is a diagram showing a configuration of a set TCW instruction.

FIG. 17 is a diagram showing a configuration of a preset memory instruction.

FIG. 18 is a diagram showing a configuration of a set window instruction in an extended line graphics mode according to still another embodiment of the present invention.

FIG. 19 is a diagram showing a window in the extended line graphics mode.

FIG. 20 is a view showing a configuration of a set window instruction in the extended TV graphics mode.

FIG. 21 is a diagram showing a configuration of a preset memory instruction.

FIG. 22 is a diagram showing a configuration of a preset border command.

FIG. 23 is an exemplary view showing a window in the extended TV graphics mode.

FIG. 24 is a block diagram showing a reproducing apparatus for reproducing a recording medium by using an information reproducing method according to another embodiment of the present invention.

FIG. 25 is a block diagram showing a reproducing apparatus for reproducing a recording medium using an information reproducing method according to still another embodiment of the present invention.

FIG. 26 is a flowchart showing the operation of a processor in the system controller 32 of the apparatus shown in FIG. 25;

FIG. 27 is a diagram showing a recording format of a subcode.

FIG. 28 is a diagram showing a screen configuration in a line graphics mode.

FIG. 29 is a diagram showing a screen configuration in a TV graphics mode.

[Description of Signs of Main Parts]

20 disk 22 pickup 26 RF amplifier 30 video format signal demodulation processing circuit 31 coded information signal demodulation processing circuit 33 video switch 42 EFM demodulation circuit 53 mode / instruction Decoder 55 Image memory device 58 Color look-up table 66 Transparency control table 68, 69 Switch

Continued on the front page (72) Inventor Yoichiro Tsuda 4-2610 Hanazono, Tokorozawa City, Saitama Prefecture Inside Pioneer Corporation Tokorozawa Plant (72) Inventor Shoichi Katagiri 4-2610 Hanazono Tokorozawa City, Saitama Prefecture Pioneer Corporation Tokorozawa Plant (72) Inventor Satoshi Nomura 4-2610 Hanazono, Tokorozawa-shi, Saitama Prefecture Pioneer Corporation Tokorozawa Plant Examiner Mitsutake Fujiuchi (58) Field surveyed (Int.Cl. ⁶ , DB name) H04N 5/92 G11B 20 / 12 H04N 5/265 H04N 5/85

Claims (4)

(57) [Claims] A first recording medium on which a digital audio signal is recorded, an image signal carrying main image information, a digital audio signal, an image signal carrying sub image information, and a mixing ratio of the main image information and the sub image information. Is a method of reproducing information in a reproducing apparatus capable of reproducing the second recording medium on which the mixture ratio specifying information for specifying the information is recorded, wherein it is determined that the recording medium to be reproduced is the second recording medium Demodulating the main image information, the sub-image information and the mixture ratio designation information from the read signal obtained from the second recording medium, and adding the sub-image information to the main image information at a mixture ratio according to the mixture ratio designation information. An information reproducing method characterized by generating an image signal obtained by mixing the above. 2. A first recording medium on which a digital audio signal is recorded, an image signal carrying main image information, a digital audio signal, an image signal carrying sub image information, and a mixing ratio of the main image information and the sub image information. And the second recording medium on which the mixed area specifying information for specifying the area where the sub-image information is to be mixed on the two-dimensional screen formed by the main image information is recorded. An information reproducing method for a reproducing apparatus capable of reproducing, when it is determined that a recording medium to be reproduced is the second recording medium, the main image information and the sub image data are read from a read signal obtained from the second recording medium. The image information, the mixture ratio designation information, and the mixture region designation information are demodulated, and the mixture region on the two-dimensional screen formed by the main image information is mixed with the mixture ratio according to the mixture ratio designation information. An information reproducing method comprising: generating an image signal in which the sub-image information is mixed in an area specified by area specifying information. 3. A first recording medium on which a digital audio signal is recorded, an image signal carrying main image information, a digital audio signal, an image signal carrying sub image information, and a mixing ratio of said main image information and sub image information. A method for reproducing information in a reproducing apparatus capable of reproducing a second recording medium on which mixture ratio specifying information for specifying the main image information is recorded, wherein the recording medium to be reproduced is the second recording medium and the main image information When it is determined that the mixture of the sub-image information is designated, the main image information, the sub-image information and the mixture ratio designation information are demodulated from the read signal obtained from the second recording medium, An information reproducing method comprising: generating an image signal in which the main image information and the sub-image information are mixed at a mixing ratio according to the mixing ratio designation information. 4. A first recording medium on which a digital audio signal is recorded, an image signal carrying main image information, a digital audio signal, an image signal carrying sub image information, and a mixing ratio of the main image information and the sub image information. And the second recording medium on which the mixed area specifying information for specifying the area where the sub-image information is to be mixed on the two-dimensional screen formed by the main image information is recorded. An information reproducing method in a possible reproducing apparatus, wherein it is determined that a recording medium to be reproduced is the second recording medium and that mixing of the sub-image information with respect to the main image information is specified. Demodulating the main image information, the sub-image information, the mixture ratio designation information and the mixture region designation information from the read signal obtained from the second recording medium, and using the mixture ratio according to the mixture ratio designation information. And generating an image signal in which the sub-image information is mixed in an area specified by the mixed area specifying information on the two-dimensional screen formed by the main image information.