JPH01256060A - Image information reproducing processor - Google Patents

Abstract

PURPOSE:To easily recognize the superimposed letters of a subtitle by varying the display state of an image signal corresponding to a graphic code including image information obtainable from a recording medium as its inserted subcodes. CONSTITUTION:The subject device is provided with a display state changing means for varying the display state of the image signal corresponding to the graphic code including the image information obtained from the recording medium (disk) as the inserted subcodes in response to a command. Consequently, the positions and colors of the superimposed letters of a subtitle based on the subcodes and a mixing ratio of superimposed letters of the subtitle to animation, etc., can manually by changed. By this method, the superimposed letters of the subtitle can easily be legible.

Description

TECHNICAL FIELD The present invention relates to an apparatus for reproducing image information recorded on a recording medium such as a video disc or a digital audio disc.

BACKGROUND ART In a recording medium such as a video disc on which the contents of a movie film source are recorded, characters such as translated subtitles are generally recorded as part of the screen information. Conventional devices that reproduce image information recorded on such recording media are configured to simply reproduce characters such as translated subtitles as part of screen information obtained from the recording medium. For this reason, in conventional image information reproduction processing devices, the characters for subtitles are displayed only at the bottom edge of the screen, or at the left or right edge, making it difficult to see. There was a problem in that it was not possible to follow the movement of the entire screen, which should be watched closely.

On the other hand, a method has been proposed in which image information is recorded as a subcode on a digital audio disc and reproduced. The subcode is formed of 8 bits, and the bit group forming this subcode is PSQ.

It is divided into 8 channels: R, S, T, U, V, and W. In the method of recording and reproducing image information as a subcode, as shown in Figure 9, the data corresponding to the image information is formed by 6 bits of channels R-W of the 8 bits forming the subcode to form one symbol. 98 symbols are treated as one block. Two of these 98 symbols are used as synchronization signals, and the remaining 96
Twenty-four symbols obtained by dividing the symbol into four equal parts are treated as a minimum unit of data [pack], and constitute one image processing command.

The first symbol of these 24 symbols (hereinafter referred to as symbol 0) indicates the mode. Symbol 1 following symbol O indicating this mode is an instruction (lN5TRUcTION) indicating the type of instruction. Symbol 3 and symbol 4 following the instruction are parity Q, which is an error correction code. Each symbol from symbol 4 to symbol 19 following parity Q forms a data field and includes color information and the like. Each symbol from symbol 20 to symbol 23 following the data field is parity P, which is an error correction code for protecting the information in the pack.

Modes include zero mode, line gelafix mode,
There are four types of modes: TV graphics mode and user mode. The zero mode is a mode for when, for example, no operation is to be performed on the display screen, that is, when it is desired to leave the image as it is, and all data in the pack is 0.

The line gala fix mode is a mode for displaying information such as song descriptions using a liquid crystal display, for example, on the front of the player. ] A horizontally long screen is constructed. Note that a pixel refers to the smallest pixel that can be displayed, and is a screen constituent unit called a FONT that is divided into 6 pixels in the horizontal (COLUMN) direction and 12 pixels in the vertical (ROW) direction. Normally, image processing is performed for each image.

The number of fonts that can be displayed in this line galley fix mode is 48 in the horizontal direction and 2 in the vertical direction, which is called a screen area. Then, for the scrolling function, an image is created by adding one font to the top, bottom, left and right of the outside of the screen area. Subcodes are formed to perform the processing. Note that the area outside the screen area is called a border.

The TV graphics mode is a mode for displaying images on the TV screen, and as shown in FIG.
A screen of 8 [pixels] x 192 [pixels] vertically is configured. The number of fonts that can be displayed in this TV graphics mode is 48 in the horizontal direction and 16 in the vertical direction. Also, in this TV graphics mode, there is an address corresponding to each pixel on the screen of 50 [font] horizontally x 18 [font] vertically, which is obtained by adding one font to the top, bottom, left and right of the outside of the screen area. Subcodes are formed to perform image processing by memory.

Image processing instructions include, for example, an instruction to fill an entire screen with a certain color, an instruction to draw a picture using two different colors for one font on the screen, an instruction to move the entire screen vertically or horizontally, etc. be.

Of the 8 bits forming the subcode, the channel Q bit contains time information corresponding to the track length from the beginning of the program area of the CD to a predetermined location of each information data recorded, and indicates the recording position. It forms address time data that can be used as position data. Further, the bits of channel P form data including inter-song information.

As described above, in the method of recording and reproducing image information as a subcode, a maximum of 16 image channels can be specified. That is, for example, WRITE FONT foreground/background in TV graphics mode.
The FORECROUND/13ACKGROUND) command has a configuration as shown in FIG. This is a write command. For pixels whose font data is “0”, “color〇” (COLO
The color with the first color specified in "RO)" is specified as the background color.If the font data is "1"
” for the pixel “Color1 (COLOR1)
” The color with the first number is the foreground color.
Specified as a color. Further, at this time, the channel in the sub-picture can be specified by the 4 bits of channels R and S of symbol 4 and symbol 5, and a maximum of 16 image channels can be specified. By specifying this image channel, 16 types of images can be recorded, and the user of the disc can select and reproduce a desired image channel at the time of reproduction.

In addition, each number from "0" to "15°" exists as the first collar number. From the first collar number "0" to the first collar number "15".
” corresponds to 16 different colors, and these 16 colors are stored in the LOAD color lookup table color 0 to color 15 (LOAD CL) in the TV graphics mode.
Set by the UT C0LOURO to C0LOUR15) commands. Load color lookup table
Colors 0 to 15 have the configuration shown in Fig. 13, and are preset color number 1 or foreground/
This is a command to set the contents of a color lookup table indicating the color of background color number 1. It is necessary to specify 16 colors in total, but since the colors are 4 bits each for RGB, 2 symbols are required to set one color, and only 8 colors can be set in one batch. For this reason, this command is divided into two commands that respectively designate the first eight colors and the latter eight colors.

The instruction code for the first eight colors, Color 0 to Color 7, is '30', and the instruction code for the latter half, Color 8 to Color 15, is '31'.The color combination for each color number is , red is
Color is represented by 4 bits of channel R-U of even symbols assigned to one number, and green is represented by 2 bits of channel VSW following channel R-U of even symbols and channels R and S of the next odd symbol. It is represented by 2 bits, a total of 4 bits, and blue indicates the following channel T-
It is represented by 4 bits of W. Therefore, there are 2' (-16) gray scales for each color, and since they are RGBB colors, it is possible to mix 16' (-4096) colors. In addition, gray scale "0000" is the darkest state,
"1111" corresponds to the brightest state.

Images obtained from a recording medium using the above-mentioned subcode recording/reproducing method and an F.
Zero mode, line graphic fix mode, and TV graphics in the conventional subcode-based image information recording and reproducing system are used to display images based on M-modulated and recorded video format signals on a single screen at the same time. In addition to the four types of modes: mode and user mode, there is a graphics mode with motion picture (GRAP former C8MODEWI) as shown in Figure 14.
The applicant of the present application has separately proposed setting a code to be inserted as symbol 0 in order to specify THMOTION PICTURE).

The screen configuration in graphics mode with motion picture is the same as that in TV graphics mode, and the screen configuration is as shown in FIG.
NSPARENCY C0NTR0L TABLE)
There is a command called. This load transparency control table command is a command that specifies the mode of each pixel on the screen. There are three modes specified by this command: transparent mode, mixed mode, and non-transparent mode. These 3
In each type of mode, the mixing ratio of the video format signal obtained by the subcode and the video format signal multiplexed and recorded together with the coded information signal including this subcode is set to a different value.

Channel RW of each symbol from symbol 4 to symbol 8 and each pip of channel R1S of symbol 9,
Codes TCB-0 to TCB-1 specify the mode for each pixel for which each color is registered as color number ``0°'' to color number ``15''.
5 is formed. FIG. 16 shows these codes TCB-
The correspondence between the bit patterns 0 to TCB-15 and each mode and the mixing ratio in each mode are shown.

According to the above-described recording and reproducing system, it is possible to superimpose an image obtained by a subcode of a digital audio signal as a subtitle on an image of a video format signal that has been FM modulated and multiplexed with a digital audio signal.

Even when a device configured to simply process image processing commands is used as an image information reproducing processing device that reproduces image information from a recording medium on which image information is recorded using such a recording/reproducing method, the characters in the subtitle superimpose are set at the time of recording. It may be difficult to see because it is displayed only in the specified mode.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide an image information reproduction processing device that can make the characters of subtitles easier to see.

The image information reproduction processing device according to the present invention is provided with display mode changing means for changing the display mode of an image signal corresponding to a graphic code containing image information inserted as a subcode obtained from a recording medium in response to a command. ing.

EXAMPLES Hereinafter, examples of the present invention will be described in detail with reference to FIGS. 1 to 8.

In FIG. 1, the disk 20 is connected to the spindle motor 21.
The recorded information is read by an optical pickup 22.

The disk 20 is, for example, a composite disk as shown in FIG. 2, and has a first area (
A second area (hereinafter referred to as a video area) in which an FM-modulated video format signal and a digital audio signal into which a subcode containing image information is inserted is multiplied by ff1 and recorded. )2
0b. PC for video format signal
It contains a higher frequency component than the M signal, and when recording the signal in the video area 20b, it is necessary to increase the rotational speed of the disc compared to when recording in the CD area 20a. However, even when playing, the CD area 20
It is necessary to reproduce the disc at a higher rotational speed in the video area 20b than in the video area 20b. The rotation speed is several hundred rpm in the CD area 20a, whereas in the video area 20b, the rotation speed is around 2,000 rpm at the innermost circumference of the area.
The rotational speed is extremely high at the outermost periphery, reaching over 1,000 rp+*.

A lead-in area is provided at the beginning of each of the CD area 20a and the video area 20b, and each lead-in area contains an index code related to the recorded content of each area, for example, each small part constituting each area. The first and second index code groups are recorded as subcodes corresponding to each area by repeating the index code indicating the start and end time, etc., and the index code of the audio lead-in area includes the Type information indicating whether the disc is a composite disc is also included.

The pickup 22 that reads recorded information on the disk 20 includes an optical system including a laser diode, an objective lens, a photodetector, etc., and a focus actuator that drives the objective lens in the front axis direction with respect to the information recording surface of the disk 20, and a pickup. A tracking actuator and the like are built in to bias the beam spot (information detection point) emitted from the recording track 22 in the disk radial direction. The pickup 22 is mounted on a slider 23 that is movable in the radial direction of the disk, and the slider 23 is linearly driven by a transmission mechanism 25 that uses a slider motor 24 as a drive source and is composed of, for example, a combination of a rack and a pinion. 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.

The video format signal demodulation processing circuit 30 includes, for example, R
It has a demodulation circuit that demodulates the F-fold signal and converts it into a video format signal, and a memory that stores the demodulated video format signal after digitizing it, and the video format signal output from the demodulation circuit and the video format signal read out from the memory. The configuration is such that one of the video format signals is selectively output in response to a switching command from the system controller 32. The video format signal outputted from the video format signal demodulation processing circuit 30 is supplied as the video output of the disc player 19 to the video switch 33 in the image information reproduction processing device 34 according to the present invention. Further, this video format signal demodulation processing circuit 30 is provided with a separation circuit that separates and extracts the horizontal synchronization signal h1 vertical synchronization signal V and control data C from the demodulated video format signal.
'These horizontal and vertical synchronizing signals, v, and control data C are supplied to each section such as the system controller 32.

Further, the coded information signal demodulation processing circuit 31 is configured to demodulate the PCM audio signal in the RF signal to generate an analog audio signal, and separate and output subcodes of the PCM audio signal. □ Of the subcodes output from the coded information signal processing circuit 31, the bits of channel PSQ are supplied to the system controller 32, and the bits of channel P-W are supplied to the image information reproduction processing device as the subcode output of the disc player 19. 34.

Near the movement path of the pickup 22 in the disk radial direction, a detection signal is generated by detecting that the beam spot emitted from the pickup 22 has arrived 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 is provided. By generating 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. A detection signal output from the position detector 70 is supplied to the system controller 32.

The system controller 32 is composed of a microcomputer including a processor, ROM (read only memory), RAM, and the like.

This system controller 32 has a horizontal synchronization signal,
Vertical synchronization signal V and control data c, EFM demodulation circuit 42
Each bit of channels P and Q in the subcode output from the
Disc designation information indicating whether the disc is a disc or a composite disc, mode designation information indicating whether the playback area during playback of the composite disc is only a CD area, only a video area, or a double-headed area, etc. are supplied. In this system controller 32,
The processor processes the input signal according to a program stored in advance in the ROM, and processes each part of the video format signal demodulation processing circuit 30, each part of the coded information signal demodulation processing circuit 31, and a drive circuit that drives the spindle motor 21 (Fig. (not shown), controls various parts such as a drive circuit 71 that drives a slider motor and a display section 72.

In the image information reproduction processing device 34, the channel R-W bits output from the coded information signal demodulation processing circuit 31 are supplied to a deinterleaving/error correction circuit 52. In the deinterleaving/error correction circuit 52,
De-interleaving of 6 bits of channels R-W and error correction using parities Q and P are performed. The output data of the deinterleaving/error correction circuit 52 is
The instruction decoder 53 is supplied with the instruction decoder 53.

The mode/instruction decoder 53 decodes the mode specified by the 3 bits of channel RT of symbol 0 of each pack and the mode specified by the item represented by 3 bits of channels U-W and the channel of symbol 1 of each pack. The structure is such that an instruction represented by 6 bits of R-W is decoded and a signal indicating the mode and instruction is supplied to each section.

Further, output data of the deinterleaving/error correction circuit 52 is supplied to a memory controller 54. The memory controller 54 is supplied with horizontal and vertical synchronization signals v separated by a synchronization separation circuit (not shown) from the video format signal output from one disc player. The memory controller 54 has a mode/
Depending on the mode indicated by the output of the instruction decoder 53 and the type of instruction, data indicating the color number of each pixel of each image channel in the output data of the deinterleaving/error correction circuit 52 is detected and the data is processed according to the image channel. multiplexer 55 along with control data
supply to. The memory controller 54 also sends write address data and a write command pulse corresponding to the pixel corresponding to the data to one of the 16 video memories 56a to 56p corresponding to the image channel of the data to be supplied to the multiplexer 55. At the same time, horizontal and vertical synchronizing signals are supplied to the video memories 56a to 56p.
The read address data and the read command pulse that change sequentially are supplied by the read address data and the read command pulse. The multiplexer 55 transfers data indicating the color number of each pixel output from the memory controller 54 to the video memories 56a to 56. It is configured to selectively supply one of them corresponding to the control data. The video memories 56a to 56p are horizontally 50
It consists of a RAM that has addresses corresponding to all pixels on a screen of font x 18 fonts vertically, and each address can store 4-bit data.

Data read from video memories 56a to 56p is supplied to selector 57. The selector 57 is configured to selectively output one of the data read from each of the video memories 56a to 56p according to the channel designation data d according to the key operation output from the operation unit 91. . The output data of this selector 57 is supplied to a color look up table (hereinafter referred to as CLUT) 58. The CLUT 58 controls the deinterleaving/error correction circuit 5 depending on the mode and instruction type indicated by the output of the mode/instruction decoder 53.
Load/CLUT-color 〇~ of the output data of 2
Color 7 command and load/CLUTφ Color 8 to Color 15 commands are detected and the color data corresponding to each color number is held, and from among the held color data, the color number indicated by the data output from the selector 57 is selected. The configuration is such that it selectively outputs color data.

The output data of this CLUT 58 consists of three data each representing the level of each color signal of R, G, and B with 4 bits. RSG, B output from CLUT58
The three data representing the level of each color signal are as follows:
The signals are supplied to D/A conversion circuits 61, 62, and 63 and converted into analog signals. The outputs of these D/A conversion circuits 61 to 63 are supplied to an analog video conversion circuit 65 via a matrix circuit 64. The matrix circuit 64 is configured to switch and control the connections between the D/A conversion circuits 61 to 63 and the analog video conversion circuit 65 using color control data e according to key operations output from the operation section 91. The analog video conversion circuit 65 includes D/A conversion circuits 61 to 63 supplied via the matrix circuit 64, for example.
A luminance signal and two color difference signals are obtained by the output of The configuration is such that a chrominance signal is added and synthesized with a luminance signal and a synchronization signal is added to form an NTSC video signal. This analog video conversion circuit 65 converts the outputs of the D/A conversion circuits 61 to 63 into video signals and sends them out.

Further, the output data of the deinterleaving/error correction circuit 52 is also supplied to a transparency control table (hereinafter referred to as TCT) 66. TCT6
6 is based on an image information recording and reproducing method using subcodes, which has been separately proposed by the applicant of the present invention, and de-interleaving and deinterleaving are performed depending on the mode and type of instruction indicated by the output of the mode/instruction decoder 53.
Detecting the load TCT command among the output data of the error correction circuit 52, the transverency control bits TCB-0 to TCB-15 corresponding to each color number are set.
is held, and one of the held TCB-0 to TCB-15 corresponding to the color number indicated by the data output from the selector 57 is selected and output.

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

In the video switch 33, the video format signal obtained from the subcode is directly supplied to the fixed contact X of the changeover switch 68, and simultaneously supplied to the fixed contact y via the variable resistance circuit 92.

The variable resistance circuit 92 is configured such that its resistance value changes in accordance with the mixture ratio control data f corresponding to key operations output from the operation unit 91. The fixed contact 2 of the changeover switch 68 has an open end. The changeover switch 68 is TCT6
The movable contact U is brought into contact with one of the fixed contacts xSySz by the control signal output from the fixed contact X5Y.
The configuration is such that a signal supplied to one of sZ is selectively output. Further, the video format signal outputted from the video format signal demodulation processing circuit 30 is directly supplied to the fixed contact 2 of the changeover switch 69 and simultaneously supplied to the fixed contact y via the variable resistance circuit 93.

The variable resistance circuit 93 is configured such that its resistance value changes in accordance with the mixture ratio control data f corresponding to key operations output from the operation unit 91. The fixed contact X of the changeover switch 69 has an open end. The changeover switch 69, like the changeover switch 68, is configured to bring the movable contact U into contact with one of the fixed contacts x and ySz in response to a control signal. These changeover switches 68 and six movable contacts U are connected to each other. Common connection point J of these movable contacts U
A resistor R is connected between and 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 this common connection point J.

When the movable contact U of the changeover switch 68, 69 contacts the fixed contact X, the mixing ratio of the video format signal obtained from the subcode becomes 100%, and the movable contact U contacts the fixed contact 2.
When it comes into contact with , the mixing ratio becomes 0%. In addition, the movable contact U
When contacting the fixed contact y, the mixing ratio changes to the variable resistance circuit 9
The value corresponds to the resistance value of 2.93. The signal derived at the common connection point J is supplied to the video output terminal.

FIG. 3 is a block diagram showing a specific circuit example of the video format signal demodulation processing circuit 30, in which the RF multiplied signal from the RF amplifier 26 is demodulated into a video signal by the demodulation circuit 85,
Thereafter, it is supplied to a time base correction circuit 86 and a separation circuit 87. The separation circuit 87 separates the horizontal synchronization signal h1 vertical synchronization signal V and control data C included in the video format signal.
are separated and extracted. Note that the separation circuit 87 has, for example, an oscillator, and is configured to generate and output a horizontal synchronization signal and a vertical synchronization signal V of a predetermined frequency when no video format signal is supplied by the oscillator. .

The time axis correction circuit 86 includes, for example, a CCD (Charg
e CoupledDevlce), etc., and is configured to perform time adjustment by changing the amount of delay of the element in accordance with a control signal from the time axis control circuit 88. The time axis control circuit 88 uses, for example, the oscillation output of a crystal oscillator (VCXO) 89 that oscillates in synchronization with the horizontal synchronization signal and its frequency-divided output separated and extracted by the separation circuit 87 and the video signal that has passed through the time axis correction circuit 86. It is configured to output a control signal according to the phase difference between the horizontal synchronization signal and the color burst signal in the signal, and its specific configuration is shown in Japanese Patent Application Laid-Open No. 102182/1982.

The time axis corrected video signal is supplied to a selection switch 90 and is also supplied to an A/D (analog/digital) converter 92 via an LPF (low pass filter) 91. In the A/D converter 92, the video signal is sampled at a predetermined period, and the obtained sample values are sequentially converted into digital data. The output data of this A/D converter 92 is supplied to a video memory 93 consisting of a RAM (random φ access ◆memory) or the like.

As the video memory 93, one having a storage capacity capable of storing at least one field's worth of video information is used. Address control and mode control of this video memory 93 are performed by a memory control circuit 94. The memory control circuit 94 sequentially reads the data written in each address of the video memory 93 using the clock from the reference clock generation circuit 95, and controls the data of the video memory 93 in response to the write enable signal W output from the system controller 32. The configuration is such that control is performed to rewrite the contents of each address. The data read from the video memory 93 is converted into an analog signal by a D/A (digital/analog) converter 96, and becomes an extraction input of the selection switch 90 via an LPF 97. The selection switch 90 is normally located on the a side and selectively outputs the video format signal directly supplied from the time axis correction circuit 86.
In response to a switching command from the system controller 32, b
By switching to the side, the video format signal that has passed through the video memory 93 is selectively output.・ Also, FIG. 4 is a block diagram showing a specific circuit example of the coded information signal demodulation processing circuit 31, in which a selection switch 35 is switched depending on the area to be played (CD area and video area) during playback of a composite disc. is provided.

This switch 35 is located on the a side when reproducing the CD area, and on the b side when reproducing the video area, and is switched in response to a switching command issued from the system controller 32. In the case of a composite disc, the rotational speed of the disc is extremely different between the CD area and the video area, and the PCM audio signal is e.g.
In the video domain, if the digital signal is directly superimposed on the FM modulated video signal during recording, the EFM signal will have a negative effect on the low frequency components of the FM video signal. Although the degree of modulation is the same, the EFM signal is recorded with a signal level suppressed by several tens of degrees compared to the video carrier. Therefore, the same EFM signal has different frequency characteristics and amplitude when playing back the CD area and when playing the video area. Therefore, by switching the signal processing system of the reproduced EFM signal between the CD area and the video area, the demodulation system can be changed. The aim is to share the information.

That is, when reproducing the CD area, the reproduced RF signal is EF
The EFM signal has its frequency characteristics compensated by an equalizer circuit 36 having predetermined equalizing characteristics, and is further amplified by an amplifier 37 with a predetermined gain. On the other hand, in the case of video area playback, FM is included in the playback RF signal.
Only the EFM signal included with the video signal is extracted by an EFM extraction circuit 38 consisting of an LPF or the like, and the frequency characteristic is compensated by an equalizer circuit 39 which has equalization characteristics different from that of the equalizer circuit 36, and is further larger than that of the amplifier 37. By being amplified by the amplifier 40 having a gain, it is output as an EFM signal with frequency characteristics and amplitude equivalent to those during CD region reproduction.

Incidentally, when playing back a compact disc, the selection switch 35 is always in the state where the a side is selected.

The reproduced EFM signal selected by the selection switch 35 is EFM
The signal is supplied to the demodulation circuit 42. The EFM demodulation circuit 42 is configured to demodulate the reproduced EFM signal to obtain PCM data, that is, digital data and subcodes including, for example, time-division multiplexed audio information of both left and right channels. Digital data including audio information output from the EFM demodulation circuit 42 is supplied to a deinterleaving/interpolation circuit 43. The deinterleaving/interpolation circuit 43 cooperates with the RAM 44 to restore the digital data whose order has been rearranged by the interleaving performed during recording, and sends it to the error correction circuit 45, and the error correction circuit 45 outputs an uncorrectable signal. It is configured to interpolate error data in the output data of the error correction circuit 45 by an average value interpolation method or the like when output. The error correction circuit 45 is a CI RC (Cross Interlea
ve Reed Sol.

The digital data is de-interleaved and error corrected by the error correction circuit 43.
It is configured to simultaneously supply the uncorrectable signal to the deinterleaving/error correction circuit 43 if the error cannot be corrected.

The output data of the deinterleaving/interpolation circuit 43 is
A (digital-to-analog) conversion circuit 46 is supplied. The D/A conversion circuit 46 has a demultiplexer that separates digital data including time-division multiplexed left and right channel audio information from each other, so that both left and right channel audio signals are reproduced. After unnecessary components are removed from the reproduced audio signals of both the left and right channels by LPFs (low pass filters) 47 and 48, they are sent to the audio output terminal O via amplifiers 49 and 50.
UT+,0 is supplied to UT2.

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

It is assumed that the composite disc has already been set at the playback 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 Sl). When a detection switch (not shown) detects that the pickup 22 has reached the innermost circumference position, the processor focuses the pickup 22 and then reads the index code recorded in the audio lead-in area on the innermost circumference of the disc. Information is read (step S2).

Next, the processor determines whether the set disk is a composite disk based on the value of a predetermined bit of the control signal part in the data block constituted by the bits of channel Q forming the subcode in the read information of the lead-in area. It is determined whether or not there is one (step S3).
). If it is a compact disc, just type C.
The process shifts to the D play mode (step S4), and the playback operation continues unless there is a particular command such as program selection. Note that since the playback operation in the CD play mode is well known, the explanation will be omitted here.

If it is determined in step S3 that the disc is a composite disc, the processor accelerates the spindle motor 21 toward the maximum specified rotation speed in the video area in step S5.
), at the same time, the slider motor 24 is driven to rotate at high speed to move the pickup 22 toward the outer circumference of the disk at high speed (step S6).

Thereafter, when it is detected by the detection signal from the position detector 70 that the pickup 22 has reached the video area (step S7), the processor starts the reproduction operation of the video area (step S8). During playback of this video area, the processor controls to write into the video memory 93 at least one field (or one frame) of predetermined video information obtained from the disc.

This video information to be written may be the first information in the video area, and may also be specified in advance by addressing, for example, by operating keys on the operation unit 60.

When it is detected in step S9 that the playback of the video area has ended, the processor decelerates the spindle motor 21 toward the maximum prescribed rotational speed in the CD area (step 510), and simultaneously drives the slider motor 24 to rotate at high speed to pick up the data. 22 is moved at high speed to the innermost position of the disk (step 511). When it is detected that the pickup 22 has reached the innermost circumferential position of the disc based on the detection output of the aforementioned detection switch (not shown) (step 512), the processor starts the reproduction operation of the CD area (step 813). At the same time, the processor switches the selection switch 90 in the video format signal demodulation processing circuit 30 to the b side, selects the video information written in the video memory 93 during video area playback, outputs the video, and outputs the video information for one period of playback of the CD area. Still images are played back.

When it is detected that the playback of the CD area has ended by reading the audio lead-out information (step 51
4), the processor drives the slider motor 24 to move the pickup 22 to the home position (step 515), and ejects the disc by a loading mechanism (not shown) (step 516), thus completing the series of playback operations.

After the recorded information in the video area of the composite disc is reproduced in steps 81 to S9 in the above operation, the recorded information in the CD area is reproduced in steps SIO to S14. Now, load-CLU by mode/instruction decoder 53 during playback of video area.
When the T color 0 to color 7 instructions and the load CLUT color 8 to 15 instructions are decoded, the CLUT 58 holds color data for the designated 16 colors out of 4096 colors.

Thereafter, by decoding the light, font, foreground/background commands, etc., each of the 16 channels of image data is stored in the video memories 56a to 56p by the memory controller 54 and multiplexer 55.

Data read from one of the video memories 56a to 56p according to the channel designation data d is selectively output from the selector 57. This selector 57
When the image data output from the CLUT 58 is supplied to the CLUT 58, the color data of the color number indicated by the image data is output from the CLUT 58. A video format signal based on this color data is sent to the analog video conversion circuit 65.
The video signal is output from the video switch 33 and supplied to the video switch 33.

Here, when the load TCT command based on the recording/reproducing method separately proposed by the applicant of the present application is decoded, the TCT 66 has transverency control Φ bits TCB-0 to TCB-1 corresponding to each color number.
5 is retained. And the held TCB-0~TC
One of B-15 corresponding to the color number indicated by the data output from the selector 57 is selectively set to T.
The signal is output from the CT 66, and the mixing ratio in the video switch 33 is specified by the output of the TCT 66. Then, the mixing ratio of 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 on a pixel-by-pixel basis. As a result, for example, as shown in FIG. 6, the mixing ratio of the portion corresponding to each pixel outside the area of image A by the video format signal output from the video format signal demodulation processing circuit 30 is reduced to 1.
00%, the mixing ratio of the portion corresponding to each pixel within the area is set to 0%, and the portion corresponding to each pixel outside the area of image B according to the video format signal output from the analog video conversion circuit 65. The image obtained by combining the part of image A outside the area and the part of image B inside the area by setting the mixing ratio of the area to 0% and the mixing ratio of the part corresponding to each pixel in the area to 100%. image C can be formed. Therefore, as shown in FIGS. 7(A) to 7(C), subtitles, musical scores, and scenes can be added to moving images obtained from video format signals recorded in the video area or still images obtained from the video memory 83 using subcodes. This means that explanatory text etc. can be inserted.

Also, for example, a code occupying a channel other than the channel occupied by the code forming the subtitle super bar as shown in FIG. If the subcode is inserted and recorded, the image channel will be switched according to the channel designation data d corresponding to the key operation on the operation unit 91, and the position of the image according to the subcode can be changed by manual operation. .

In addition, since the connection between the D/A conversion circuits 61 to 63 and the analog video conversion circuit 65 is switched and controlled by the color control data e according to the key operation outputted from the operation unit 91, the subcode image can be imaged by manual operation. You can also change the color of.

Further, the resistance value of the variable resistance circuit 92.93 changes according to the mixture ratio control data f corresponding to the key operation outputted from the operation section 91, and the movable contact U of the changeover switch 68.69
The mixing ratio of the video format signal obtained from the subcode and the video format signal output from the video format signal demodulation processing circuit 30 when the contact point y contacts the fixed contact y is determined according to the resistance value of the variable resistance circuit 92.93. Since the mixing ratio is a value, the mixing ratio can also be changed by manual operation.

Effects of the Invention As detailed above, in the image information reproduction processing device according to the present invention, the display mode of an image signal corresponding to a graphic code containing image information inserted as a subcode obtained from a recording medium is changed according to a command. Since the display mode changing means is provided, it is possible to manually change the position and color of the characters in the subtitle superimposition according to the subcode, the mixing ratio of the subtitle superimposition text and the video, etc.
This makes it possible to make the text in the subtitles easier to read.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a diagram showing a recording area of a composite disk, and FIG. 3 is a block diagram showing an embodiment of the present invention.
FIG. 4 is a block diagram showing a specific example of the configuration of the video format signal demodulation processing circuit 30 in the apparatus shown in FIG. 1; FIG. 1 is a flowchart showing the operation of the processor in the system controller 32 of the device shown in FIG. 1, FIGS. 6, 7, and 8 are diagrams showing images obtained by the device shown in FIG. 1, and FIG. ,
A diagram showing the recording format of the subcode, FIG. 10, is as follows:
FIG. 11 is a diagram showing the screen configuration in the line graphics mode. FIG. 12 is a diagram showing the configuration of the light font foreground/background command. FIG. 13 is a diagram showing the screen configuration in the TV graphics mode. 14 shows the configuration of the load color lookup table color 0 to color 7 instructions, FIG. 14 shows the mode types, and FIG. 15 shows the configuration of the load transparency control table instruction. FIG. 16 is a diagram showing the correspondence between the TCB bit pattern and the mixing ratio. Applicant Pioneer Corporation

Claims (4)

[Claims] (1) In addition to the video format signal and the coded information signal, a graphic code containing image information is inserted as a subcode of the coded information signal to form an image signal corresponding to the graphic code obtained from the recorded recording medium. An image information reproduction processing device that mixes the image information into a video format signal obtained from the recording medium, the image information comprising: display mode changing means for changing the display mode of the image signal according to a command. Regeneration processing equipment. (2) The image information reproduction processing device according to claim 1, wherein the display mode changing means changes the position of the image based on the image signal. (3) The image information reproduction processing device according to claim 1, wherein the display mode changing means changes the color of the image based on the image signal. (4) The image information reproduction processing device according to claim 1, wherein the display mode changing means changes a mixing ratio when mixing the image signal with the video format signal.