JP3025659B2 - Recorded information reproducing apparatus and recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art When recording and reproducing the contents of a movie film source on a recording medium such as a video disk, characters such as translated subtitles are usually superimposed on the screen from the beginning. Characters obtained by such a conventional method are always displayed irrespective of the user's intention, and may be annoying in some cases.

Here, there has been proposed a method of recording and reproducing image information as a subcode on a digital audio disk. The subcode is formed by 8 bits, and the bits forming the subcode are P, Q, R, S,
It is divided into eight channels of T, U, V and W. In the method of recording and reproducing image information as a subcode, as shown in FIG. 16, data corresponding to the image information includes channels R to W of 8 bits forming the subcode.
6 bits form one symbol, and 98 symbols are 1
Treated as a block. 2 of these 98 symbols
The symbols are used as synchronization signals, and 24 symbols obtained by dividing the remaining 96 symbols into four equal parts are treated as a minimum unit [Pack] of data, and constitute one image processing instruction.

The first symbol of the 24 symbols (hereinafter, referred to as symbol 0) indicates a mode. Symbol 1 following symbol 0 indicating this mode is an instruction (INSTRUCTION) indicating the type of instruction. Symbols 3 and 4 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.

[0005] 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 (pixel) and 24 vertical
A horizontally long screen of [pixel] is configured. A pixel is a minimum pixel that can be displayed, and is a screen 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, 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.
In addition, the area outside the screen area is a border (BORD
ER).

[0007] The TV graphics mode is a mode for displaying an image on a television screen, and a screen of 288 [pixels] x 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 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, that is, 48 × 16.
It takes about 2.5 seconds to display characters. This is approximately 2.
48x1 on the track traced by the pickup for 5 seconds
This means that data for six characters can be recorded, and it is understood that the recording capacity is sufficient to record subtitles in several languages.

However, in the conventional recording / reproducing method based on the subcode, an image such as a character obtained is displayed using the entire area of the screen. Cannot be superimposed as a subtitle superimposed on the image based on the video format signal.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is directed to a recording system capable of superimposing character information such as subtitles on a moving image corresponding to a movie film source or the like. an object of the present invention is to provide an information playback equipment.

[0012]

A recording information reproducing apparatus according to the present invention is a recording information reproducing apparatus for reproducing recording information from a recording medium on which a main image signal and a sub image signal are individually recorded, The recording medium is based on the sub-image signal.
Display area specification information that specifies the screen area where the image should be displayed
Is further recorded, and the main image signal is recorded from the recording medium.
Signal, the sub-image signal, and the display area designation information.
Playback means for playing, and a finger according to the display area designation information.
An image based on the sub-image signal within the defined screen area
Is displayed in the main image signal so that the sub-image signal
And mixing means for mixing .

[0013]

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described in detail with reference to FIGS. First, as shown in FIG. 1, an extended line graphics mode and an extended TV graphics mode are set in addition to the four modes of a conventional method, a zero mode, a line graphics mode, a TV graphics mode, and a user mode. Set the code to be inserted as symbol 0 to specify.

The screen configuration in the extended line graphics mode is the same as that in the line graphics mode, and includes 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. 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 diagonal lines in FIG. Only is specified. The mixing ratio is specified by two bits of the channels R and S forming the symbol 4, and the mixing ratio will be described later.

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. 4 is provided. A preset memory (PRESET MEMORY) in the TV graphics mode. There is an instruction having a configuration as shown in FIG. 5 which is a modification of the instruction referred to as “PRESET BORDER” and an instruction having a configuration as shown in FIG.

The set window instruction in the extended TV graphics mode is referred to as a "window" defined by a position on the screen designated by symbols 6 and 7 and a position designated by symbols 8 and 9. This is a command for setting a rectangular area. The point corresponding to the upper left corner of the window (S
_{The position of x} , S _y ) in the vertical direction is represented by ROW by the five bits of channels S to W of symbol 6, and the position of point (S _x , S _y ) in the horizontal direction is R to R of symbol 7. It is represented by a column (COLUMN) by the 6 bits of W. A point (e) corresponding to the lower right corner of the window
_x , e _y ) in the vertical direction are S to W of the symbol 8
5 bits represented by the row (ROW) by the point (e _x, e _y) position R of the symbols 9 in the horizontal direction of the
ＷW are represented by a column (COLUMN) by 6 bits. With this set window instruction, a window as shown by hatching in FIG. 7 is set on the display screen.

The display in the set window mixes a video format signal obtained based on the subcode with a video format signal multiplexed and recorded together with a digital signal containing the subcode, for example, after being subjected to FM modulation. 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 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 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 a TV command.
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.

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 code for the first eight colors, ie, color 0 to color 7, is "30", and the instruction code for the second half color 8 to color 15 is "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.

FIG. 10 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 the figure, a composite disc 20 has a first area (hereinafter referred to as a CD area) 20 on the inner peripheral side where a digital audio signal into which a subcode including image information is inserted is recorded.
a and a second area (hereinafter referred to as a video area) 20b in which an FM-modulated video format signal and a digital audio signal into which a subcode including image information is inserted are recorded in a superimposed manner. I have. The video format signal contains a frequency component higher than that of the PCM signal, and is recorded when the signal is recorded in the video area 20b.
It is necessary to increase the rotation speed of the disc in recording in the D area 20a. As a result, the rotation speed of the disc in the video area 20b is naturally increased in reproduction as well as in the CD area 20a. Must be played in state. The rotation speed is several hundreds in the CD area 20a.
In the video area 20b, the rotation speed is 2,000 and several hundred rpm at the innermost periphery and 1,000 and several hundred rpm at the outermost periphery.

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 by repeating an index code indicating a start time and an end time of each small part, and the index code of the audio lead-in area includes the first and second index code groups. Type information indicating whether the disk is a composite disk is also included.

FIG. 11 shows a disc player for reproducing recorded information from a composite disc as described above. In FIG. 11, a disk 20 is driven to rotate by a spindle motor 21, and 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 displacing 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 which is movable in the radial direction of the disk. The slider 23 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. A read RF (high frequency) signal output from the pickup 22 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 the CD area is reproduced, 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) The unnecessary components are removed by 47 and 48 and then supplied to audio output terminals OUT ₁ and OUT ₂ via amplifiers 49 and 50.

On the other hand, two bits of channels P and Q in 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 includes a mode represented by the three bits of channels R to T of symbol 0 of each pack and a mode designated by the item represented by three bits of channels U to W, and the channel of symbol 1 of each pack. An instruction represented by 6 bits of R to W is decoded, and a signal indicating a mode and an 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
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 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 format signal is formed. The outputs of the D / A conversion circuits 61 to 63 are converted into video format signals by the analog video conversion circuit 65 and transmitted.

The deinterleave / error correction circuit 5
2 is also supplied to the window attribute memory device 67. The window attribute memory device 67 has a width of 50
A RAM 68 which has addresses corresponding to all fonts on the screen of font × 18 fonts, each of which can store 2-bit data, a mode indicated by the 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 mixing ratio are detected, and the detected mixing ratio is stored in the address corresponding to the font in the window of the RAM 68. 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 6 for sequentially reading out the stored contents of the RAM 68 in a predetermined order by the horizontal and vertical synchronization signals h and v.
It consists of nine. This window attribute memory device 6
7 is supplied to the switch control circuit 70. The switch control circuit 70 is configured to supply the video switch 33 with a control signal corresponding to the mixture ratio of each font indicated by the output data of the window attribute memory device 67. To the video switch 33, in addition to the output of the switch control circuit 70, a video format signal obtained from the sub-code 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. Is done.

In the video switch 33, the video format signal obtained from the subcode is transmitted to the changeover switch 7
2 are directly supplied to the fixed contacts u, and at the same time, the resistors R ₁ and R ₂
Are supplied to the fixed contacts x, y via the. Changeover switch 7
The second fixed contact z is an open end. The changeover switch 72 brings the movable contact t into contact with one of the fixed contacts u, x, y, z by a control signal output from the switch control circuit 70, and It is configured to selectively output one supplied signal. Further, the video format signal from the video format signal demodulation processing circuit 30 is supplied directly to the fixed contact z of the changeover switch 73 and simultaneously to the fixed contacts x and y via the resistors R ₃ and R ₄ . The fixed contact u of the changeover switch 73 is an open end. The changeover switch 73 is
Similar to the changeover switch 72, the movable contact t
Is brought into contact with one of the fixed contacts u, x, y, z. The movable contacts t of these changeover switches 72 and 73 are connected to each other. Between the ground and the common connection point J of movable contacts t resistor R ₅ is connected.
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 72 and 73 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%. Become.
When the movable contact t contacts the fixed contact x, the value of the resistors R _{1 to} R ₄ is set such that the mixture ratio becomes 70%, and when the movable contact t contacts the fixed contact y, the mixture ratio becomes 30%. Have been. Derived signals to the common connection point J is supplied to the video output terminal OUT _3.

In the vicinity of the moving path of the pickup 22 in the radial direction of the disc, it is detected by detecting that the beam spot emitted from the big-up 22 has reached a position corresponding to the vicinity of the boundary between the CD area and the video area on the composite disc. A position detector 75 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 75, one having a known configuration such as an optical sensor can be used. The detection signal output from the position detector 75 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. , And controls the driving circuit 76 for driving the slider motor, the display unit 77, and other components.

FIG. 12 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 80 and then supplied to a time axis correction circuit 81 and a separation circuit 82. The separation circuit 82 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 81
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 83. Time axis control circuit 8
Reference numeral 3 denotes an oscillation output and a divided output of a crystal oscillator (VCXO) 84 which oscillates in synchronization with, for example, a horizontal synchronization signal h separated and extracted by the separation circuit 82, and a horizontal signal in the video signal passed through the time axis correction circuit 81. 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 video signal whose time axis has been corrected becomes one input of a selection switch 85 and is supplied to an A / D (analog / digital) converter 87 via an LPF (low-pass filter) 86. In the A / D converter 87, 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 87 is supplied to a video memory 88 such as a RAM (random access memory). As the video memory 88, 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 88 are performed by a memory control circuit 89. The memory control circuit 89 includes a reference clock generation circuit 90
, The data written in each address of the video memory 88 is sequentially read out, and the contents of each address of the video memory 88 are controlled to be rewritten in response to a write enable signal w output from the system controller 32. It has a configuration. Video memory 8
8 is converted into an analog signal by a D / A (digital / analog) converter 91,
It becomes another input of the selection switch 85 via 92. The selection switch 85 normally outputs the video format signal directly supplied from the time axis correction circuit 81 on the a side, and switches to the b side in response to the switching command from the system controller 32, thereby providing the video memory. A video format signal which has passed through 88 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 76 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 based on the read information, it is determined whether the set disk is a composite disk (step S2).
3). 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 rotational 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 it is detected by the detection signal from the position detector 75 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 88. The video information to be written may be the first information in the video area, 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 rotation speed in the CD area (step S10), and simultaneously rotates the slider motor 24 at a high speed. It drives to move the pickup 22 to the innermost position of the disk 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 85 in the video format signal demodulation processing circuit 30 to the b side, selects the video information written in the video memory 88 at the time of reproducing the video area, and makes it a video output. Plays back still images. 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.

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. Now, during the reproduction of the video area, the mode / instruction decoder 53 loads the CLUT, color 0 to color 7 instructions and load.
When the CLUT color 8 to color 15 instructions are decoded, the CLUT 58 has the designated 1 out of 4096 colors.
Six color data are held. Thereafter, by decoding the light font foreground / background instruction and the like, the 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 converted to an analog video conversion circuit 6.
5 and supplied to the video switch 33.

Here, when the window set instruction is decoded, the R in the window attribute memory device 67 is
At the address corresponding to the font outside the window designated by the window set instruction of AM68, 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 68 of the window attribute memory 67 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 in font units.
As a result, as shown in FIG. 14, the mixing ratio of the portion corresponding to each font in the window D of the image A by the video format signal output from the video format signal demodulation processing circuit 30 is 0%, that is, from the analog video signal conversion circuit 65. If the mixture ratio of the portion corresponding to each font in the window D of the image B by the video format signal by the output subcode is set to 100%, the image A
Can be formed by combining the portion outside the window D with the portion inside the window D of the image B. The RAM in the window attribute memory device 67
By writing data indicating a mixing ratio of 100% of the video format signal by the subcode at an address corresponding to the font outside the window specified by the window set instruction of No. 68, the portion of the image A in the window D is It is also possible to form an image obtained by combining the image B with a portion outside the window D.

Therefore, as shown in FIGS. 15A to 15C, it is possible to insert a subtitle, a score, a description of a scene, and the like into a moving image obtained from a video format signal recorded in a video area by using a subcode. Becomes 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 disk, and the subtitles in the language of the desired country are operated by key operation of the operation unit 60. Supermarkets can be selectively displayed, eliminating the need to create masters for each country.

As described above, subcode channels R to W 6
The case where image information is recorded / reproduced using bits has been described. Characters, symbols, and the like as image information are coded, inserted into channel Q and recorded, and the window is set at a predetermined position. By doing so, it is conceivable to record and reproduce image information only by the channel Q. In this case, channel Q has 1
Since 64-bit data can be inserted at / 75 [seconds], 1
In seconds, 4800 bits of data can be inserted. Since 9/10 of the 4800 bits are used as track number, minute and second data, 1/10 of the maximum 4800 bits can be used as data representing characters, symbols, and the like. Therefore, for example, if characters in three languages are inserted, 160 bits can be allocated to one language per second, and the same effect as in the above embodiment can be obtained.

In the above embodiment, the recording medium on which the subcode carrying the image information is recorded is a composite disc called CDV, but the recording medium on which the subcode carrying the image information is recorded is described as a recording medium. Alternatively, another recording medium 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 be used.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating types of recording modes.

FIG. 2 is a diagram showing a configuration of a set window instruction in an extended line graphics mode.

FIG. 3 is a diagram showing a window in an extended line graphics mode.

FIG. 4 is a diagram showing a configuration of a set window instruction in the extended TV graphics mode.

FIG. 5 is a diagram showing a configuration of a preset memory instruction.

FIG. 6 is a diagram showing a configuration of a preset border command.

FIG. 7 is a diagram showing a window in the extended TV graphics mode.

FIG. 8 is a diagram showing a load color look-up table color 0 to color 7 instruction.

FIG. 9 is a diagram showing a configuration of a light font foreground / background instruction.

FIG. 10 is a diagram showing a recording area of a composite disc.

FIG. 11 is a block diagram showing a disc player as a recorded information reproducing apparatus according to the present invention.

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

FIG. 13 is a flowchart showing an operation of a processor in the system controller 32 of the apparatus shown in FIG. 11;

FIG. 14 is a diagram showing an image obtained by the apparatus of FIG. 11;

FIG. 15 is a diagram showing an image obtained by the apparatus of FIG. 11;

FIG. 16 is a diagram showing a recording format of a subcode.

FIG. 17 is a diagram illustrating a screen configuration in a line graphics mode.

FIG. 18 is a diagram showing a screen configuration in a TV graphics mode.

[Explanation of Signs of Main Parts]

 Reference Signs List 20 disc 22 pickup 30 video format signal demodulation processing circuit 32 system controller 42 EFM demodulation circuit 65 analog video signal conversion circuit 67 window attribute memory 70 switch control circuit 72, 73 switch

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuro Emi 2680 Nishi-Hanawa, Tatomi-cho, Nakakoma-gun, Yamanashi Prefecture Inside Pioneer Video Co., Ltd. (72) Inventor Junichi Yuo 4-2610 Hanazono, Tokorozawa-shi, Saitama Prefecture In the factory (56) References JP-A-63-43480 (JP, A) JP-A-56-102182 (JP, A) JP-A-63-160476 (JP, A) JP-A-63-14582 (JP, A) JP-A-58-92181 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 5/91-5/956 G11B 20/12 103 H04N 5/262-5/278 H04N 5/85

Claims (3)

(57) [Claims] 1. A recording information reproducing apparatus for reproducing recording information from a recording medium on which a main image signal and a sub-image signal are individually recorded, wherein the recording medium stores an image based on the sub-image signal. Show
Display area specifying information for specifying the screen area to be
The main image signal, the sub image signal, and the
Playback means for playing back each of the display area designation information, and the screen area designated by the display area designation information.
Before the image based on the sub-image signal is displayed
Recording means for reproducing the recorded information, comprising: mixing means for mixing the sub-image signal into the main image signal . 2. A main image signal and a sub image signal are individually recorded.
Information reproduction for reproducing the recorded information from the recorded recording medium
An apparatus for displaying an image based on the sub-image signal on the recording medium.
Display area specifying information for specifying a screen area to be
The mixing ratio when mixing the sub-image signal in the image signal is specified.
The mixture ratio designation information to be specified is further recorded, and the main image signal, the sub image signal, and the
Display area designation information, and each of the mixed non-designation information
Reproduction means for reproducing, and the screen area specified by the display area specification information
To display an image based on the sub-image signal,
At the mixing ratio specified by the mixing non-designating information
Mixing means for mixing the sub-image signal into the main image signal
And a recorded information reproducing apparatus. 3. The main image signal is an image signal carrying a moving image.
That is, the sub-image signal is an image signal carrying subtitles.
The recorded information reproducing apparatus according to claim 1 or 2, wherein: