JPH1092161A - Recording medium and recoreded information reproducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a reproduced image easily which is full of variations and free from incongruity. SOLUTION: A set of main image information which carries a main image, a set of auxiliary image information which carries an auxiliary image which corresponds to at least one channel among N channels and a set of identification information of that channel are recorded in a recording medium. A recorded information reproducer reproduces the recorded information of the recording medium in which the set of the main image information which carries the main image and a set of title information which carries titles corresponding to a plurality of languages in relation to the main image are recorded. Further, a reading means 22 which reads the information in the recording medium optically and generates read information, a selecting means 32 which selects one among a plurality of the languages, a demodulating means 31 which demodulates the main image information from the read information and demodulates the title information corresponding to the language selected by the selecting means and a means 33 which mixes the demodulated main image information and the title information so as to have the titles superposed upon the main image and generates synthesized image information are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a video disc,
The present invention relates to a recording medium such as a digital audio disc and an apparatus for reproducing recorded information.

[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 disk 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. 26, data corresponding to the image information has one symbol formed by 6 bits of channels R to W of 8 bits forming the 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 a 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. The symbols 2 and 3 following the instruction are:
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. Each symbol from the symbol 20 to the symbol 23 following the data field 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. In the line graphics mode, for example, a liquid crystal display or the like is provided on the front of the player to display a description of a song or the like.
As shown in FIG. 7, 288 horizontal (pixels) × 24 vertical
A horizontally long screen of [pixel] is configured. A pixel is a minimum pixel that can be displayed, and is a screen configuration unit called a font (FONT) divided into 6 pixels in the horizontal (COLUMN) direction and divided into 12 pixels in the vertical (ROW) direction. Usually, image processing is performed every time.

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, which 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.
In addition, the area outside the screen area is a border (BORD
ER).

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 with 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 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 location of each piece of information data recorded. It forms address time data that can be used as the indicated position data. Further, the bits of the channel P form data including inter-music information.

In the method of recording and reproducing image information as a subcode 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. there were.

Therefore, if an attempt is made to obtain a reproduced image by mixing an image signal corresponding to the sub-image information recorded as the sub-code with a video format signal carrying the separately generated main image information, the sub-image information and the main image If there is no relationship between the information and the information, a sense of incongruity occurs in the obtained mixed reproduced image.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and is directed to a recording medium and a recording information reproducing apparatus capable of easily obtaining a reproduced image that is rich in change and has no uncomfortable feeling. The purpose is to provide.

[0011]

A recording medium according to the present invention is a recording medium for recording image information, and includes at least one of main image information carrying a main image and N (N is a natural number of 2 or more) channels. The sub-image information carrying the sub-image corresponding to one channel and the identification information of the at least one channel are recorded.

A recording information reproducing apparatus according to the present invention reproduces recording information of a recording medium on which main image information carrying a main image and subtitle information carrying subtitles corresponding to a plurality of languages are recorded. Reading means for optically reading the recording medium to generate read information, selecting means for selecting one of the plurality of languages, and selecting the main image information and the selecting means from the read information Demodulating means for demodulating subtitle information corresponding to a language, and means for generating combined image information by mixing the main image information and the subtitle information demodulated by the demodulating means so that the subtitle is superimposed on the main image. It is characterized by having.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to FIGS. First, FIG.
As shown in FIG. 5, 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, a graphics mode with motion picture (GRAPHICS MODE WITH M)
Set the code to insert as symbol 0 to specify OTION 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 TRA) as shown in FIG.
There is an instruction called NSPARENCY CONTROL TABLE).
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, the mixing ratio between the video format signal obtained by the subcode and the video format signal multiplexed and recorded together with the coded information signal including the subcode is set to different values.

Channels R to W of symbols 4 to 8 and channels R of symbol 9
Each bit of S is from color number “0” to color number “1”.
A code TCB- designating a mode for each pixel for which each color registered as 5 "is specified.
0 to TCB-15. FIG. 3 shows the correspondence between the bit patterns of these codes TCB-0 to TCB-15 and each mode, and the mixing ratio in each mode.

The color number "0" is changed to the color number "1".
The 16 colors up to 5 "are set by a load color look-up table color 0 to color 15 (LOAD CLUT COLOUR0 to COLOUR15) instruction in the TV graphics mode.
Color 0 to color 15 have a configuration as shown in FIG.
This is an instruction to set the contents of a color lookup table indicating the color of a preset color number or a foreground / background color number. 16 in total
Although it is necessary to specify a color, since each color is 4 bits for RGB, two symbols are required to set one color, and only eight colors can be set in one pack. For this reason, this instruction
It is divided into two instructions that specify the color and the latter eight colors, respectively.

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". In the color mixture for each color number, red is represented by 4 bits of channels RU of even symbols assigned to the color number, and green is represented by channels V and W following channels RU of even symbols. 2 bits and 2 of the next odd symbol channel R, S
The blue color is represented by the following four bits of channels T to W. Therefore, the gray scale for each color 2 ⁴ (= 16) exists as, RGB three
Since it is a color, it is possible to mix 16 ³ (= 4096) colors. The gray scale “0000” is the darkest state,
“1111” corresponds to the brightest state.

A WRITE FONT FOREGROUND / BACKGROUND instruction in the TV graphics mode is shown in FIG.
And has a configuration as shown in FIG.
This is an instruction to write font data of the symbols 8 to 19 at a column address position defined by the address and the symbol 7. For a pixel whose font data is "0", the color of the color number defined by "color 0 (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. At this time, channel R of symbol 4 and symbol 5
And S, the sub-picture channel can be specified. Up to 16 image channels can be specified. By specifying the image channel, 16 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.

Next, a case where a digital audio signal as a coded information signal into which a subcode including image information is inserted as described above is recorded on a composite disc as shown in FIG. 6 will be described. In FIG.
0 indicates a first area (hereinafter referred to as a CD area) 20a on the inner circumference side where a digital audio signal into which a subcode including image information is inserted is recorded, and an FM-modulated video format signal and image information. And a second area (hereinafter, referred to as a video area) 20b in which a digital audio signal into which the subcode is inserted is superimposed and recorded. The video format signal contains a frequency component higher than that of the PCM signal.
It is necessary to increase the rotation speed of the disc when recording a signal to the CD area 20b as compared to when recording to the CD area 20a. The disc must be played at a high rotational speed. The rotation speed is C
In the D area 20a, 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 very high, one thousand and several hundred rpm.

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 an index code related to the recorded contents of each area, for example, each area. A first and a second index code group corresponding to each area are recorded as sub-codes by repeating index codes indicating the start and end times of the respective small parts, and are added to the index code of the audio lead-in area. Also includes type information indicating whether the disc is a composite disc.

Also, for example, the bits of channel R of the subcode recorded in the audio lead-in area have the same format as the bits of channel Q as shown in FIG. That is, the number of bits of the channel R in one subcode frame is 98 as in the other channels, and 96 bits excluding the two bits forming the synchronization signal are the control field, the address field, the data field, and the It is divided into four CRCC fields.

The bits of the data field are, as shown in FIG. 8, a code indicating the channel number of each image channel from 0 to 15, a code indicating the presence or absence of image information, and a character group consisting of eight characters indicating the contents of the image information. The code corresponding to each character is formed. In a portion corresponding to a predetermined horizontal scanning line in a vertical blanking period of a video format signal recorded in the video area 20b, channel designation data for designating an image channel can be inserted as a control signal.

FIG. 9 shows a disc player for reproducing the recorded information of the composite disc as described above. In FIG. 9, a disk 20 is driven to rotate by a spindle motor 21, and the 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 and storing the demodulated video format 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 the 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, and the PCM audio signal is, for example, EFM.
(Eight to Fourteen Modulation) signal, and in the video domain, the digital signal is
When superimposed on the video signal subjected to M modulation processing, EFM
Since the signal adversely affects the low-frequency component of the FM video signal, the EFM signal is recorded in a state where the signal level is suppressed by about several tens of dB with respect to the video carrier, although the modulation degree is the same. Therefore, even with the same EFM signal, the CD
Since the frequency characteristics and the amplitude are different between the area reproduction and the video area reproduction, by switching the signal processing system of the reproduced EFM signal between the CD area and the video area,
The demodulation system is 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 the EFM signal included in the signal together with the FM video signal is extracted by the 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 a compact disk, the selection switch 35 is always in the state of selecting the a side. The reproduction EFM signal selected by the selection switch 35 is E
The signal is supplied to the FM demodulation circuit 42. EFM demodulation circuit 42
Is configured to demodulate a 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 audio information output from the EFM demodulation circuit 42 is supplied to a deinterleave / interpolation circuit 43. The deinterleave / interpolation 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. When output, 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 has a CIRC (Cross Interleave Reed).
The digital data is supplied to the deinterleave / error correction circuit 43 when error correction is performed by the Solomon Code, and an uncorrectable signal is simultaneously supplied to the deinterleave / error correction circuit 43 when correction is impossible. .

The output data of the deinterleave / interpolation circuit 43 is supplied 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, the bits of channel R in the subcode output from the EFM demodulation circuit 42 are transmitted to the system controller 32 and the deinterleave / error correction circuit 52.
Supplied to Further, two bits of channels P and Q in the subcode output from the EFM demodulation circuit 42 are:
The 6 bits of channels R to W are supplied only to the system controller 32, and are supplied only 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. The output data of the deinterleave / error correction circuit 52 is output to a mode / instruction decoder 53.
Supplied to The mode / instruction decoder 53 outputs the symbols R to T of the symbol 0 of each pack.
Mode and channels U to W represented by bits
The mode specified by the item represented by the three bits of
The instruction represented by the 6 bits of W 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 every pixel on the screen of 50 horizontal fonts × 18 vertical fonts, 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 data is detected at the corresponding address in the RAMs 56a to 56p. Write, horizontal and vertical synchronizing signals h, v
A memory control circuit 57 for sequentially reading out one storage content corresponding to an image channel specified by the channel specification data d output from the system controller 32 among the M56a to 56p in a predetermined order.

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 includes a load, a CLUT, and a load of the output data of the deinterleave / error correction circuit 52 depending on 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, color data corresponding to each color number is held, and the data is indicated by data read from the image memory device 55 from the held color data. Is selected and output.

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 type 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. The video switch 33 has a TCT66 output,
Analog video conversion circuit 65 derived from subcode
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 directly 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.
The fixed contact x of the changeover switch 69 is an open end. 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. The movable contacts u of these 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. A signal obtained by mixing the video signal obtained from the subcode and the video format signal output from the video format signal demodulation processing circuit 30 is derived from the common connection point J. Changeover switches 68, 6
When the 9 movable contacts u make contact with the fixed contacts x, the mixing ratio of the video format signal obtained from the subcode is 100%.
When the movable contact u comes into contact with the fixed contact z, the mixing ratio becomes 0%. The values of the resistors R1 and R2 are set so that the mixing ratio becomes M (M is 20 to 80%) when the movable contact u comes into contact with the fixed contact y. The signal derived from the common connection point J is supplied to the video output terminal OUT3.

In the vicinity of the moving path of the pickup 22 in the radial direction of the disk, it is detected by detecting that the beam spot emitted from the big-up 22 arrives at a position corresponding to the vicinity of the boundary between the CD area and the video area on the composite disk. A position detector 70 for generating a signal is provided. By the generation of this detection signal, it is possible to detect that the pickup 22 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, Q, and R in a subcode output from the EFM demodulation circuit 42, and a disk to be reproduced from the operation unit 60. Is compact
Disc specification information indicating whether the disc is a composite disc or a composite disc, mode specification information indicating whether the reproduction area during reproduction of the composite disc is only the CD area, only the video area, or both areas are supplied. In this system controller 32,
The processor processes a signal input according to a program stored in the ROM in advance, and drives each part of the video format signal demodulation processing circuit 30, the selection switch 35, the memory control circuit 57, and the drive circuit (not shown) for driving the spindle motor 21. ), And controls the driving circuit 71 for driving the slider motor, the display unit 72, and other components.

FIG. 10 is a block diagram showing a specific example of the video format signal demodulation processing circuit 30.
The RF signal from the amplifier 26 is demodulated into a video signal by a demodulation circuit 75, and then supplied to a time axis correction circuit 76 and a separation circuit 77. 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. Time axis correction circuit 76
Is composed of, for example, a variable delay element such as a CCD (Charge Coupled Device), and performs a time axis correction by changing a delay amount of the element according to a control signal from the time axis control circuit 78. Time axis control circuit 7
Reference numeral 8 denotes an oscillation output of a crystal oscillator (VCXO) 79 which oscillates in synchronization with, for example, a horizontal synchronizing signal h separated and extracted by the separation circuit 77 and a divided output thereof, and a horizontal signal in the video signal passed through the time axis correction circuit 76. It is configured to output a control signal according to the phase difference between the synchronization signal and the color burst signal.
No. 82, for example.

The time-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 RAM (random access memory). As the video memory 83, a memory having a storage capacity capable of storing at least one field of video information 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 in each address of the video memory 83 is sequentially read out by the clock from and the control is performed to rewrite the contents of each address of the video memory 83 in response to the write enable signal w output from the system controller 32. It has a configuration. 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 selectively outputs the video format signal directly supplied from the time axis correction circuit 76 on the a side, and switches to the b side in response to the switching command from the system controller 32, thereby selecting the video memory. The video format signal passed through 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, and 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. The pickup 22 is moved to the innermost position of the disk (step S1). When the detection switch (not shown) detects that the pickup 22 has reached the innermost position, the processor focuses the pickup 22 and then searches the index code recorded in the audio lead-in area at the innermost position of the disc. The information is read (step S2), and subsequently, is set based on the value of a predetermined bit of, for example, a control signal portion in a data block constituted by bits of channel Q forming a subcode in the read information. It is determined whether the disk is a composite disk (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 forms the sub-code in the read information obtained in step S2 by using the bits in the control field among the bits of the channel R forming the subcode. It is determined whether or not sub-code graphics are recorded according to the set code (step S5). If it is determined in step S5 that sub-code graphics have been recorded, the processor uses the bits in the data field of the bits of channel R that form the sub-code in the read information obtained in step S2. The channel number of the image channel recorded by the formed code and the character group forming the sentence explaining the content are detected and displayed (step S6). If a character display is not used as the display unit 72 at this time, only the recorded image channels may be displayed. In this case, for example, sixteen light emitting diodes corresponding to each of the sixteen image channels are provided on the display unit 72, and only one of the sixteen light emitting diodes corresponding to the recorded image channel is turned on. do it.

Thereafter, the processor accelerates the spindle motor 21 toward the maximum specified rotational speed in the video area (step S7), and simultaneously drives the slider motor 24 at a high speed to move the pickup 22 at a high speed in the outer peripheral direction of the disk. (Step S8). If it is determined in step S5 that subcode graphics have not been recorded, the processor immediately proceeds to step S7.

Thereafter, when it is detected by the detection signal from the position detector 70 that the pickup 22 has reached the video area (step S9), the processor starts the reproduction operation of the video area (step S10). During the reproduction of the video area, the processor controls to write predetermined video information of at least one field (or one frame) obtained from the disc into the video memory 83. The video information to be written may be the first information in the video area.
It can also be specified in advance by specifying an address by key operation of 0.

The processor is also provided with the separating circuit 7.
It is determined whether or not an image channel designating code exists in the control data c output from 7 (step S11).
If the image channel designation code exists, the data d corresponding to the channel designated by the code is supplied to the memory control circuit 57 (step S12), and it is determined whether or not the reproduction of the video area has been completed (step S1).
3).

If it is determined in step S11 that there is no image channel designation code in the control data c, the processor determines whether or not an image channel has been designated by a key operation of the operation unit 60 (step S14). When it is determined that the image channel has been designated by the key operation, the data d corresponding to the designated image channel is supplied to the memory control 57 (step S).
15), proceed to step S13.

If it is determined in step S14 that the image channel has not been designated by the key operation, the processor supplies data d corresponding to the predetermined image channel to the memory control circuit 57 (step S1).
6) The process proceeds to step S13. If it is determined in step S13 that the reproduction of the video area has not ended, the processor proceeds to step S11 again. If it is determined that the reproduction of the video area has ended, the processor sets the spindle motor 21 to the CD. The speed is reduced toward the maximum specified rotation speed in the region (step S17), and at the same time, the slider motor 24 is driven to rotate at a high speed to pick up
2 is moved to the disk innermost position at a high speed (step S18). When it is detected that the pickup 22 has reached the innermost position of the disk by the detection output of the above-mentioned detection switch (not shown) (step S19), the processor starts the reproduction operation of the CD area (step S20).
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, and outputs it as a video output. Play back still images.

During reproduction of the CD area, the processor determines whether or not an image channel has been designated by a key operation of the operation unit 60 (step S21). If it is determined that the image channel has been designated by a key operation Supplies the data d corresponding to the designated image channel to the memory control circuit 57 (step S22), and determines whether or not the reproduction of the CD area has been completed by reading the audio lead-out information (step S24).

If it is determined in step S21 that the image channel has not been designated by the key operation, the processor supplies data d corresponding to the predetermined image channel to the memory control circuit 57 (step S2).
3) The process proceeds to step S24. If it is determined in step S24 that the reproduction of the CD area has not ended, the processor proceeds to step S21 again. If it is determined that the reproduction of the CD area has ended, the processor drives the slider motor 24. Then, the pickup 22 is moved to the home position (step S25), the disc is ejected by a loading mechanism (not shown), and a series of reproducing operations is completed.

Steps S1 to S16 in the above operation
After the recording information in the video area of the composite disc is reproduced in step S17 to S24, the recording information in the CD area is reproduced in steps S17 to S24. The channel number and the content of the recorded image channel are displayed on the display unit 72.

Therefore, before the reproduction of the video area or the CD area is started, it is possible to know the channel number and the contents of the image by the subcode which can be superimposed on the image obtained by the video format signal recorded in the video area. Become. Further, the operation unit 6 is executed by steps S14 and S15 executed during the reproduction of the video area or steps S21 and S22 executed during the reproduction of the CD area.
Since the image channel can be selected by the key operation of 0, a desired image can be easily obtained.

Here, during playback of the video area, the mode / instruction decoder 53 loads the CL
UT, color 0 to color 7 instruction and load, CLUT,
When the color 8 to color 15 instructions are decoded, the CLU
T58 holds color data of the designated 16 colors out of 4096 colors. Thereafter, the light font foreground / background instruction and the like are decoded, whereby the RAM 56 in the image memory device 55 is decoded.
Image data of 16 channels is stored in a to 56p. 16 according to the data corresponding to the key operation of the operation unit 60
When one of the channel image data is specified,
The image data of the designated channel is stored in the image memory device 5
5 are sequentially output 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 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. 12, the mixing ratio of a 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%, and each pixel in the region D 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%.
%, The mixture ratio of the portion corresponding to each pixel in the area D is 1
By setting to 00%, 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 can be formed. Therefore, as shown in FIGS. 13A to 13C, a caption, a score, and a description of a scene obtained by a sub-code are added to a moving image obtained by a video format signal recorded in a video area or a still image obtained by a video memory 83. Etc. can be inserted.

As described above, by sequentially processing the signals read from the disk 20, it is possible to superimpose the image by the sub-code 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 recording information on the disk 20 is continuously read. It will be reproduced, and no discomfort will occur.

By inserting data corresponding to characters in each language into each of the image channels, subtitles in multiple languages are recorded on a single disc, and the desired operation is performed by operating the keys on the operation unit 60. It is possible to selectively display the subtitle superimposed in the language of the country, and there is an advantage that it is not necessary to create a master for each country.

FIG. 14 is a diagram showing another embodiment of the present invention. In this embodiment, a zero mode in a conventional system,
Set a code to be inserted as a symbol 0 to specify the extended line graphics mode and the extended TV graphics mode in addition to the four modes of the line graphics mode, the TV graphics mode, and the user mode. ing.

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.
There is a command called (SET TRANSPARENT CONTROL WORD) and a command called light font as shown in FIG. The set TCW instruction is a TC4 instruction represented by a total of 8 bits of channels T to W of symbol 4 and symbol 5.
The bits b0 to b7 of W correspond to the respective color numbers indicating the eight colors in the line graphics mode, and the mixing ratio of the pixel designated by the corresponding color number by the value of each bit b0 to b7 is 0%, 100. This is an instruction to set any value of%. In addition, light
The font command writes font data at a designated position in the image memory in the same manner as the light font command in the line graphics mode, and simultaneously outputs two colors represented by three bits of channels U to W of symbols 4 and 5, respectively. The mixing ratio at each numbered pixel is represented by the bit T of channel T for symbols 4 and 5.
This is an instruction to set any one of 0% and 100% according to each value of 0 and T1.

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. 17 and a command called a preset memory as shown in FIG. The set TCW instruction in the extended TV graphics mode is a color number in which each bit b0 to b15 of the TCW represented by a total of 16 bits of channels T to W of symbols 4 to 7 indicates 16 colors in the TV graphics mode. 0%, 1%, and 1%, respectively.
This is an instruction to set to any value of 00%. The preset memory instruction also sets the mixing ratio of the pixel set to the color of the color number represented by the four bits of the channels T to W of the symbol 4 to 0% and 100% by the value of the bit T of the channel R of the symbol 4 This is an instruction to set any value of%.

The image information recorded as a subcode in the recording format as described above is obtained by setting the TCT 66 in the apparatus shown in FIG. 9 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 number of bits of the instruction code indicating the mixing ratio at each position on the two-dimensional screen formed by the video format signal is 1 or 2, but the number of bits of the instruction code is within one pack. Any value may be used as long as it does not exceed the number of bits of the data field.

As described above, the graphic code including the image information and the instruction code indicating the mixing ratio at each position on the two-dimensional screen formed by the video format signal are inserted as the subcode of the coded 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. 14, in addition to the four modes of the conventional system, namely, the zero mode, the line graphics mode, the TV graphics mode and the user mode, an extended line graphics mode and an extended 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 command in the line graphic mode is a command for setting a rectangular area called a “window” at a position on the screen specified by the 4 bits of the channels T to W of the symbol 4. Screen area is vertical in line graphic mode
Since there are only two fonts in the direction, the whole area of the screen area is set as a window, and only the position of the window in the vertical direction on the CRT display screen is designated as shown by diagonal lines in FIG. 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. 21 is provided. A preset memory (PRESET MEMORY) in the TV graphics mode. An instruction having a configuration as shown in FIG. 22 obtained by modifying an instruction referred to as “PRESET BORDER” and an instruction having a configuration as shown in FIG.
An instruction having a configuration as shown in FIG.

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 position of x, sy) in the vertical direction is represented by ROW by 5 bits of channels S to W of symbol 6, and the position of point (sx, sy) in the horizontal direction is 6 to 6 of R to W of symbol 7. It is represented by a column (COLUMN) by a bit. The vertical position of the point (ex, ey) corresponding to the lower right corner of the window is represented by ROW using 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 represented by a column (COLUMN) by the 6 bits R to W of the symbol 9. According to this set window instruction, a window as shown by hatching in FIG. 24 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 specified to one of, for example, 0%, 30%, 70%, and 100% by two bits of channels R and S of symbol 4.

The preset memory instruction in the extended TV graphics mode is the same as the instruction 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 the 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 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. The instruction specifies one of the colors and sets 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. 25 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. 25, 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 × 18 fonts, each address being capable of storing 2-bit data, a mode indicated by an output of the mode / instruction decoder 53, and a type of instruction 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 detected mixture ratio is stored in the address corresponding to the font in the window of the RAM 91. The data corresponding to the mixing ratio 0% of the video format signal obtained by the subcode is written in the address corresponding to the font outside the window,
A memory control circuit 9 for sequentially reading out the stored contents of the RAM 91 in a predetermined order according to 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 an open end. 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 R6, R6
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 OUT3.

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 is decoded. Holds color data of 16 colors designated out of 4096 colors. After this,
By decoding a font foreground / background instruction or the like, image data of 16 channels is stored in the RAMs 56a to 56p of the image memory device 55. 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 RAM 91 in the window attribute memory device 90 is decoded.
In the address corresponding to the font outside the window specified by the window set instruction, data indicating the mixing ratio of the video format signal of 0% is written by the subcode, and the window set is stored in the address corresponding to the font in the window. Data indicating the mixture ratio specified by the instruction is written. This window attribute memory 90
The data read from the RAM 91 is supplied to the video switch 33, and 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 determined in font units. , And the same operation as the device of FIG. 9 works.

In the above embodiment, the recording medium on which the subcode carrying the image information is recorded is a composite disc called CDV. However, the recording medium on which the subcode carrying the image information is recorded is as follows. Other recording media such as a disk called an LDD, that is, a disk on which FM-modulated video format signals and audio signals and digital audio signals are multiplex-recorded can also be used.

In the apparatus shown in FIGS. 9 and 25, the bits of the channel R including the identification code information of the image channel are supplied to the system controller 32, and the identification code information is displayed on the display section 72. A decoder for decoding the code information is separately provided to generate a video format signal according to the identification code information, and the generated video format signal is connected to the connection point J of the video switch 33.
It is also conceivable to superimpose the identification code information on an image based on a video format signal or the like recorded in the video area by mixing with the signal derived in the above.

[0072]

As described in detail above, according to the present invention,
It is possible to easily obtain a reproduced image that is rich in change, has no uncomfortable feeling, and meets a user's request.

[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 diagram showing a recording area of a composite disc.

FIG. 7 is a diagram showing a format of a channel R of a subcode recorded in a lead-in area.

FIG. 8 is a diagram showing a format of a data field.

FIG. 9 is a block diagram showing an apparatus for reproducing image information recorded on a disk by a recording and reproducing method according to the present invention.

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

FIG. 11 is a flowchart showing an operation of a processor in the system controller 32 of the apparatus in FIG. 9;

FIG. 12 is a diagram showing an image obtained by the apparatus of FIG. 9;

FIG. 13 is a diagram showing an image obtained by the apparatus of FIG. 9;

FIG. 14 is a diagram showing types of recording modes in another embodiment of the present invention.

FIG. 15 is a diagram showing a configuration of a set TCW instruction.

FIG. 16 is a diagram showing a configuration of a light font command.

FIG. 17 is a diagram showing a configuration of a set TCW instruction.

FIG. 18 is a diagram showing a configuration of a preset memory instruction.

FIG. 19 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. 20 is a diagram showing a window in the extended line graphics mode.

FIG. 21 is a diagram showing a configuration of a set window instruction in the extended TV graphics mode.

FIG. 22 is a diagram showing a configuration of a preset memory instruction.

FIG. 23 is a diagram showing a configuration of a preset border command.

FIG. 24 is a diagram showing a window in the extended TV graphics mode.

FIG. 25 is a block diagram showing an apparatus for reproducing image information recorded on a disc by the recording and reproducing method according to the present invention.

FIG. 26 is a diagram showing a recording format of a subcode.

FIG. 27 is a diagram showing a screen configuration in a line graphics mode.

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

[Explanation of symbols]

 Reference Signs List 20 disc 22 pickup 26 RF amplifier 30 video format signal demodulation processing circuit 31 coded information signal demodulation processing circuit 32 system controller 33 video switch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Fig11B 27/00 D

Claims (4)

[Claims] 1. A recording medium for recording image information, comprising: main image information carrying a main image; and N (N is a natural number of 2 or more)
A recording medium, wherein sub-image information carrying a sub-image corresponding to at least one of the channels and identification information of the at least one channel are recorded. 2. The recording medium according to claim 1, wherein the sub-image is a caption, and the identification information is information for identifying a language type of the caption. 3. The recording medium according to claim 1, further comprising mixture ratio designation information indicating a mixture ratio between the main image and the sub image. 4. An apparatus for reproducing recorded information of a recording medium on which main image information carrying a main image and subtitle information carrying subtitles corresponding to a plurality of languages related thereto are recorded. Reading means for generating read information by reading the information; selecting means for selecting any of the plurality of languages; and subtitle information corresponding to the main image information and the language selected by the selecting means from the read information. Recording, comprising: demodulation means for demodulating; and means for generating composite image information by mixing main image information and subtitle information demodulated by the demodulation means so that the subtitle is superimposed on the main image. Media recording information reproducing device.