JP2807233B2 - Image information reproduction processing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an image information reproduction processing apparatus for reproducing recorded information from a recording medium on which image data is recorded together with audio information.

BACKGROUND ART There has been 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 generally called a compact disk (hereinafter abbreviated as CD). 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, data corresponding to the image information includes channels R to W of 8 bits forming the subcode as shown in FIG.
One symbol is formed by these 6 bits, and 98 symbols are treated as one block. Two of the 98 symbols are used as synchronization signals, and the remaining 96 symbols are
Twenty-four symbols obtained by equal division are treated as a minimum unit [Pack] of data, and constitute one image processing instruction.

The first symbol (hereinafter referred to as symbol 0) of the 24 symbols indicates the mode. Symbol 1 following symbol 0 indicating this mode is an instruction (INSTRUCTION) indicating the type of instruction. Symbol 3 and symbol 4 following the instruction are a parity Q which is an error correction code. Symbol 4 following parity Q
To 19 form a data field and include color information and the like. Each symbol from symbol 20 to 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.

The line graphics mode is a mode for displaying, for example, an explanation of a music by providing a liquid crystal display or the like on the front of the player, and as shown in FIG. 13, 288 [pixels (PIXEL)] × 24 [pixels] ] Is formed. A pixel is the smallest 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, and this is called a screen area. Then, a horizontal font is added to the outside of the screen area by adding one font to the top, bottom, left and right for the scroll function.
The subcode is formed so that image processing is performed by a memory having an address corresponding to each pixel on the screen of 50 [font] × 4 [font]. The area outside the screen area is called a border.

The TV graphics mode is a mode for displaying an image on a television screen, and as shown in FIG.
A screen of [pixels] × 192 [pixels] 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.
It is. In addition, in this TV graphics mode, the upper and lower sides and the left and right sides
50 [Font] x 18 vertical obtained by adding each font
A subcode is formed so that image processing is performed by a memory having an address corresponding to each pixel on the screen of [Font].

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

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.

As described above, in the method of recording and reproducing image information as a subcode, a maximum of 16 image channels can be designated. That is, for example, WRITE FONT FOREGROUND / BA in TV graphics mode
The CKGROUND instruction has a configuration as shown in FIG. 15, and is an instruction for writing font data of the symbols 8 to 19 at the positions of the row address defined by the symbol 6 and the column address defined by the symbol 7. It is. For a pixel whose font data is “0”, “Color 0 (CO
LOR 0) ”is specified as the background color. For pixels with font data of“ 1 ”, the color of the color number specified by“ Color 1 (COLOR1) ” Is designated as a foreground color. At this time, a sub-picture channel can be designated by 4 bits of channels R and S of symbol 4 and symbol 5, and a maximum of 16 image channels can be designated. 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.

Note that there are color numbers from "0" to "15". Each of the color numbers “0” to “15” corresponds to 16 different colors, and these 16 colors correspond to the load color lookup table in the TV graphics mode.
Color 0 to Color 15 (LOAD CLUT COLOUR0 to COLOUR15)
Set by command. The load color look-up table colors 0 to 15 have the configuration shown in FIG. 16 and set the contents of a color look-up table indicating the colors of preset color numbers or foreground / background color numbers. It is an instruction to do.
Although it is necessary to specify 16 colors in total, since each color is 4 bits for RGB, two symbols are required for setting one color, and only eight colors can be set in one pack. Therefore, this instruction:
It is divided into two instructions for specifying the first eight colors and the second eight colors, respectively.

The instruction code for the first eight colors, that is, 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. Two bits and two bits of the next odd symbol channels R and S are represented by a total of four bits, and blue is represented by the following four bits of channels T to W. Therefore, there are 2 ⁴ (= 16) gray scales of each color, and since there are three RGB colors, 16 ³ (= 4
[096] Mixing of colors is possible. In addition, gray scale "000
“0” corresponds to the darkest state, and “1111” corresponds to the brightest state.

As described above, a conventional image information reproduction processing apparatus that reproduces image information recorded on a recording medium by a method of recording and reproducing image information as a subcode includes an image of a designated channel among image information obtained from the recording medium. In this configuration, only information is selectively fetched and written into a single memory, and the stored contents of this memory are repeatedly read to form an image signal. However, in the method of recording and reproducing image information as a subcode, the time required for displaying one font on the screen is about 3.3 / 1000 seconds, and it takes about 2.5 seconds to display 48 × 16 characters. Further, image information of all channels is not recorded in correspondence with each music piece, and image information of the same channel may be recorded at positions apart from each other. For this reason, in the conventional image information reproduction processing apparatus, when the designated channel changes, the entire memory content of the memory is not instantaneously changed to the data of the designated channel, and the memory content of the memory is gradually designated. It will be rewritten with channel data.

Therefore, in the conventional image information reproduction processing apparatus, there are cases where images of different channels are displayed at different positions on the same screen. For this reason,
For example, if a subtitle superimposed in a different language is recorded for each channel and a subtitle superimposed in a desired language is obtained by specifying a channel, when the designated channel changes, the first half language and the second half language of the subtitle superimposition are different. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in view of the above circumstances, and provides an image information reproducing apparatus capable of instantly switching to an image of a newly designated channel when an image information switching operation is performed. It is an object to provide a processing device.

An image information reproduction processing device according to the present invention is an image information reproduction processing device that reproduces recorded information from a recording medium on which a plurality of image data are recorded, wherein the image data is reproduced from a read signal read from the recording medium. Means for demodulating each of the plurality of pieces of image data stored in the video memory, image selecting means for selectively reading specified image data from the plurality of pieces of image data stored in the video memory from the video memory, Means for generating and outputting a video signal based on the image data read from the memory.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 1 to FIG.

In FIG. 1, a disk 20 is driven to rotate by a spindle motor 21, and recorded information is read by an optical pickup 22.

The disc 20 is a composite disc as shown in FIG. 2, and includes 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 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. The video format signal contains a higher frequency component than the PCM signal, and when recording a signal to the video area 20b, it is necessary to increase the rotation speed of the disc compared to when recording to the CD area 20a. As a result, as a matter of course, during reproduction, it is necessary to perform reproduction in a state where the rotation speed of the disk in the video area 20b is higher than that in the CD area 20a. The rotation speed is several hundred rpm in the CD area 20a.
In the video area 20b, 2
A very high rotation speed of 1,000 and several hundred rpm at the outermost circumference.

A lead-in area is provided at the head of each of the CD area 20a and the video area 20b, and an index code related to the recorded contents of each area, for example, each small part constituting each area is provided in these lead-in areas. The first and second index code groups corresponding to each area are recorded as sub-codes by repeating index codes indicating the start and end times of the audio lead-in area. Type information indicating whether the disk is a composite disk is also included.

It should be noted that in order to be able to simultaneously display an image based on an FM-modulated video format signal recorded in a video area and an image based on a subcode on a single screen, a conventional image information recording / reproducing method using a subcode is used. In addition to the four modes of zero mode, line graphics mode, TV graphics mode, and user mode, as shown in FIG. 3, graphics mode with motion picture (GRAPHICS MODE WITH MOTION PICTURE)
It has been separately proposed by the present applicant and the like to set a code to be inserted as a symbol 0 in order to designate a symbol.

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 TRANSPARENCY) as shown in FIG.
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.

Each bit of channel R to W of each symbol from symbol 4 to symbol 8 and each bit of channel R and S of symbol 9 are designated by each color registered as color number “0” to color number “15”. The codes TCB-0 to TCB-15 for specifying the mode for the pixel are formed. FIG. 5 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 pickup 22 that reads recorded information on the disc 20 includes an optical system including a laser diode, an objective lens, a photodetector, and the like, a focus actuator that drives the objective lens in the optical axis direction with respect to the information recording surface of the disc 20, and a pickup. A tracking actuator or the like for shifting the beam spot (information detection point) emitted from 22 to the recording track in the radial direction of the disc is incorporated. The pickup 22 is mounted on a slider 23 that is movable in the radial direction of the disc. 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. Read RF output from pickup 22
The (high frequency) signal passes through an RF amplifier 26, a video format signal demodulation processing circuit 30 and a coded information signal demodulation processing circuit
Supplied to 31.

The video format signal demodulation processing circuit 30 is, for example, RF
A demodulation circuit for demodulating a signal to convert the signal into a video format signal; and a memory for digitizing the demodulated video format signal and storing the digitized video format signal, the video format signal output from the demodulation circuit and the video read from the memory. One of the format signals is selectively output in response to a switching command from the system controller 32. The video format signal output from the video format signal demodulation processing circuit 30 is supplied to a video switch 33. The video format signal demodulation processing circuit 30 is provided with a separation circuit for separating and extracting the horizontal synchronization signal h, the vertical synchronization signal v, and the control data c from the demodulated video format signal. The signals h and v and the control data c are supplied to each unit such as the system controller 32.

The coded information signal demodulation processing circuit 31 is configured to demodulate a PCM audio signal in an RF signal to generate an analog audio signal, and separate and output a subcode of the PCM audio signal.

Of the sub-codes output from the coded information signal processing circuit 31, bits of channels P and Q are supplied to the system controller 32, and bits of channels R to W are
It is supplied to the image information reproduction processing device 34 according to the present invention. In the image information reproduction processing device 34, the bits of channels R to W are supplied to a 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 output data of the deinterleave / error correction circuit 52 is supplied to the memory controller 54. The memory controller 54 has a mode / instruction decoder
The 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 in accordance with the mode indicated by the output 53 and the type of instruction, and the data is detected together with the control data corresponding to the image channel. The signal is supplied to the multiplexer 55. The memory controller 54 also writes 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, read address data and read command pulses which sequentially change according to the horizontal and vertical synchronization signals h and v are supplied to the video memories 56a to 56p. The multiplexer 55 is configured to selectively supply data indicating the color number of each pixel output from the memory controller 54 to one of the video memories 56a to 56p corresponding to the control data. Each of the video memories 56a to 56p has an address corresponding to all pixels on the screen of 50 horizontal fonts × 18 vertical fonts, and each address is a RAM capable of storing 4-bit data.

The data read from the video memories 56a to 56p is supplied to the 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 switching control data d output from the system controller 32. The output data of the selector 57 is supplied to a color look-up table (hereinafter, referred to as CLUT) 58. CLUT58 is
Depending on the mode indicated by the output of the mode / instruction decoder 53 and the type of instruction, load / CLUT / color 0 to color 7 instructions and load / CLUT / color 8 to color of the output data of the deinterleave / error correction circuit 52
It is configured to detect 15 instructions, hold the color data corresponding to each color number, and select and output the color data of the color number indicated by the data output from the selector 57 from the held color data. I have.

The output data of the CLUT 58 is composed of three data representing the level of each of the R, G, and B color signals by 4 bits. The three data representing the levels of the R, G, and B color signals output from the CLUT 58 are supplied to D / A conversion circuits 61, 62, and 63 and are converted into analog signals.
The outputs of these D / A conversion circuits 61 to 63 are supplied to an analog video conversion circuit 65. The analog video conversion circuit 65
For example, a luminance signal and two color difference signals are obtained by outputs of the D / A conversion circuits 61 to 63, 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. The output of the D / A conversion circuits 61 to 63 is converted into a video signal by the analog video conversion circuit 65 and transmitted.

The output data of the deinterleave / error correction circuit 52 is also supplied to a transparency control table (hereinafter, referred to as TCT) 66. The TCT66 is based on a recording / reproducing method of image information by a subcode separately proposed by the present applicant and the like.
Deinterleave / error correction circuit depending on the mode indicated by the output of instruction decoder 53 and the type of instruction
The load TCT instruction of the 52 output data is detected, the transparency control bits TCB-0 to TCB-15 corresponding to each color number are held, and the held TCB-0 to TC are held.
One of the B-15s corresponding to the color number indicated by the data output from the selector 57 is selected and output.

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

In the video switch 33, the video format signal obtained from the subcode is transmitted to the fixed contact x of the changeover switch 68.
It is supplied to the fixed contact y through simultaneous resistor R ₁ when it is supplied directly. The fixed contact z of the changeover switch 68 is open. The changeover switch 68 causes the movable contact u to come into contact with one of the fixed contacts x, y, and z by the control signal output from the TCT 66, and the signal supplied to one of the fixed contacts x, y, and z Is selectively output. The video format signal output from the video format signal demodulating circuit 30 is supplied to the fixed contact y through simultaneously resistor R ₂ when it is supplied directly to a fixed contact z of the switch 69. Fixed contact x of 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. Between the ground and the common connection point J of these movable contacts u resistor R ₃ is connected. 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. Selector switch
When the movable contacts u of 68 and 69 come into contact with the fixed contact x, the mixing ratio of the video format signal obtained from the subcode is 100
%, And when the movable contact u comes into contact with the fixed contact z, the mixing ratio becomes 0%. When the movable contact u contacts the fixed contact y, the resistance is adjusted so that the mixing ratio becomes M (M is 20 to 80%).
The values of R ₁ and R ₂ are set. 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 disk radial direction, a detection signal is generated by detecting that the beam spot emitted from the pickup 22 has reached a position corresponding to the vicinity of the boundary between the CD area and the video area on the composite disc. A position detector 70 is provided. The generation of this detection signal makes it 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. Position detector 70
Is output to the system controller 32.

The system controller 32 is configured 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, each bit 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 composite disc or a composite disc,
Mode designation information indicating whether only the CD area, only the video area, or both areas is supplied. In the system controller 32, the processor processes a signal input according to a program stored in the ROM in advance, and performs various parts of the video format signal demodulation processing circuit 30,
35, selector 57, drive circuit (not shown) for driving spindle motor 21, drive circuit for driving slider motor
The control of each unit such as 71 and the display unit 72 is performed.

FIG. 6 is a block diagram showing a specific circuit example of the video format signal demodulation processing circuit 30.
The RF signal is demodulated into a video signal by a demodulation circuit 85, and then supplied to a time axis correction circuit 86 and a separation circuit 87. The separation circuit 87 separates and extracts the horizontal synchronization signal h, the vertical synchronization signal v, and the control data c included in the video format signal. Note that the separating circuit 87 has, for example, an oscillator, and is configured to generate and output a horizontal synchronizing signal h and a vertical synchronizing signal v of a predetermined frequency when a video format signal is not supplied by the oscillator. .

The time axis correction circuit 86 is, for example, a CCD (Charge Coupled D)
evice), and the time axis is corrected by changing the delay amount of the element according to a control signal from the time axis control circuit 88. The time axis control circuit 88 includes a crystal oscillator (VCXO) that oscillates in synchronization with, for example, the horizontal synchronization signal h separated and extracted by the separation circuit 87.
It is configured to output a control signal corresponding to the phase difference between the oscillation output of 89 and its frequency-divided output, and the horizontal synchronization signal and color burst signal in the video signal that has passed through the time axis correction circuit 86. Such a configuration is disclosed in JP-A-56-102182 and the like.

The time-axis-corrected video signal becomes one input of a selection switch 90, and is input to an AF through an LPF (low-pass filter) 91.
It is supplied to a / D (analog / digital) converter 92. A /
In the D converter 92, the video signal is sampled at a predetermined cycle, and the obtained sample values are sequentially converted into digital data. The output data of this A / D converter 92 is R
It is supplied to a video memory 93 composed of an AM (random access memory) or the like. As the video memory 93, 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 93 are performed by a memory control circuit 94. The memory control circuit 94 includes a reference clock generation circuit
Data written to each address of the video memory 93 is sequentially read out by a clock from 95, and control is performed to rewrite the contents of each address of the video memory 93 in response to a write enable signal w output from the system controller 32. Configuration. Data read from video memory 93 is D / A (digital / analog)
The signal is converted into an analog signal by the converter 96 and becomes another input of the selection switch 90 via the LPF 97. The selection switch 90 normally outputs the video format signal directly supplied from the time axis correction circuit 86 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. The video format signal that has passed through 93 is selectively output.

FIG. 7 is a block diagram showing a specific circuit example of the coded information signal demodulation processing circuit 31. A selection switch 35 is provided which switches according to the area (CD area and video area) to be played back when playing back the composite disc. 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 according to a switching command issued from the system controller 32. 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, an EFM (Eight to Fourteen Modulation) signal. When superimposed on the modulated video signal, the EFM signal has an adverse effect on the low frequency component of the FM video signal, so the modulation degree is the same, but the EFM signal is about several tens of dB relative to the video carrier. It is recorded with the signal level suppressed. Therefore, even with the same EFM signal,
Since the frequency characteristics and amplitude are different between the area playback and the video area playback, playback is performed in the CD area and video area.
By switching the signal processing system for the EFM signal, the demodulation system is shared.

That is, when reproducing the CD area, the reproduced RF signal is an EFM signal, and the EFM signal is compensated for the frequency characteristic by the equalizer circuit 36 having a predetermined equalizing characteristic, and further amplified by the amplifier 37 with a predetermined gain. On the other hand, in the case of reproducing the video area, only the EFM signal included in the reproduced RF signal together with the FM video signal is an EFM extraction circuit 3 including an LPF or the like.
The frequency characteristic is compensated for by an equalizer circuit 39 having an equalizing characteristic different from that of the equalizer circuit 36, and the amplifier 40 having a gain larger than that of the amplifier 37.
The signal is output as an EFM signal having the same frequency characteristics and amplitude as in the CD area reproduction.

During reproduction of the compact disk, the selection switch 35 is always in the state of selecting the a side.

The reproduced EFM signal selected by the selection switch 35 is supplied to the EFM demodulation circuit 42. The EFM demodulation circuit 42 is configured to demodulate the reproduced EFM signal to obtain PCM data, that is, digital data and subcodes including, for example, time-division multiplexed audio information of both left and right channels. This EFM
Digital data including audio information output from the demodulation circuit 42 is supplied to a deinterleave / interpolation circuit 43. The deinterleave / interpolation circuit 43 cooperates with the RAM 44 to return the digital data whose order has been rearranged by the interleaving performed at the time of recording to the original state, and sends 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 error correction is performed by the Solomon Code, and the digital data is supplied to the deinterleave / error correction circuit 43. If the digital data cannot be corrected, the uncorrectable signal is simultaneously supplied to the deinterleave / error correction circuit 43. .

The output data of the deinterleave / interpolator 43 is D / A
It is supplied to a (digital / analog) conversion circuit 46. D /
The 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 reproduced audio signals of both the left and right channels have their unnecessary components removed by LPFs (low-pass filters) 47 and 48 and then amplifiers 49 and 50.
Are supplied to the audio output terminals OUT ₁ and OUT ₂ via.

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

It is assumed that the composite disc is already 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, thereby 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 performs focusing of the pickup 22, and
The index code information recorded in the audio lead-in area on the innermost circumference of the disc is read (step S
2).

Next, the processor sets the disk set based on the value of a predetermined bit of, for example, a control signal portion in the data block constituted by the bits of the channel Q forming the subcode in the read information in the lead-in area. It is determined whether or not there is (step S
3). If it is a compact disc, leave it as it is
The mode shifts to the D 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 accelerates the spindle motor 21 toward the maximum specified rotation speed in the video area (step S5),
At the same time, the slider motor 24 is driven to rotate at a high speed, and the pickup 22 is moved at a high speed in the outer peripheral direction of the disk (step S6).

Thereafter, when it is detected from the detection signal from the position detector 70 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 reproduction of the video area, the processor controls to write predetermined video information of at least one field (or one frame) obtained from the disk into the video memory 93. 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 sets the spindle motor 21 to the CD.
The speed is reduced toward the maximum specified rotational speed in the area (step S10), and at the same time, the slider motor 24 is driven at a high speed to move the pickup 22 to the disk innermost position at a high speed (step S11). When the pickup 22 detects that the pickup 22 has reached the innermost position of the disk based on the detection output of the above-mentioned detection switch (not shown) (step S12), the processor starts the reproducing operation of the CD area (step S1).
3). At the same time, the processor switches the selection switch 90 in the video format signal double tone processing circuit 30 to the b side, selects the video information written in the video memory 93 at the time of reproducing the video area, makes it a video output, and plays back the CD area. To reproduce a still image.

When it is detected that the reproduction of the CD area has been completed by reading the information of the audio lead-out (step S1)
4), the processor drives the slider motor 24 to move the pickup 22 to the home position (step S1).
5) Further, the disc is ejected by a loading mechanism (not shown) (step S16), and a series of reproduction operations is completed.

Further, during execution of the main routine or the like, the processor shifts to step S20 by an interruption by a timer or the like, and determines whether or not an image channel has been designated by a key operation of the operation unit 60. If it is determined in step S20 that the image channel has been designated, the processor sends the switching control data d corresponding to the designated image channel to the selector 57 (step S21), and the process proceeds to step S20.
Resumes the execution of the routine that was being executed immediately before shifting to. If it is determined in step S20 that no image channel has been specified, the processor immediately resumes the execution of the routine that was being executed immediately before shifting to step S20.

After the recorded information in the video area of the composite disc is reproduced in steps S1 to S9 in the above operation, the recorded information in the CD area is reproduced in steps S10 to S14. Now, when the load / CLUT / color 0 to color 7 instruction and the load / CLUT / color 8 to 15 instruction are decoded by the mode / instruction decoder 53 during the reproduction of the video area, the CLUT 58 is designated out of 4096 colors. Done16
The color data of the color is held.

Thereafter, when the light font foreground / background instruction and the like are decoded, the memory controller 54 and the multiplexer 55 store each of the 16-channel image data in the video memories 56a to 56p.

When an image channel is designated by a key operation of the operation unit 60, switching control data d corresponding to the image channel designated in steps S20 and S21 is supplied to the selector 57, and the designated one of the video memories 56a to 56p is designated. Data read from one corresponding to the image channel is selectively output. When the image data output from the selector 57 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 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 based on the recording / reproducing method separately proposed by the present applicant is decoded, the transparency control bits TCB-0 to TCB-15 corresponding to each color number are added to TCT66. Will be retained. One of the held TCB-0 to TCB-15 corresponding to the color number indicated by the data output from the selector 57 is selectively output from the TCT 66.
The output of 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. 10, the mixing ratio of the portion corresponding to each pixel outside the area D of the image A by the video format signal output from the video format signal demodulation processing circuit 30 is 100%, The mixture ratio of the portion corresponding to the pixel is set to 0%, the mixture ratio of the portion corresponding to each pixel outside the region D of the image B by the video format signal output from the analog video conversion circuit 65 is set to 0%, and the region D The image C obtained by combining the portion outside the region D of the image A and the portion inside the region D of the image B by setting the mixture ratio of the portion corresponding to each pixel in the region to 100% can be formed. . Therefore, as shown in FIGS. 11 (A) to 11 (C), subtitles, scores, and scenes are described by subcodes in a moving image obtained by a video format signal recorded in the video area or a still image obtained by the video memory 83. A sentence or the like can be inserted.

When an image channel is specified by a key operation of the operation unit 60, switching control data d corresponding to the image channel specified in steps S20 and S21 is supplied to the selector 57, and the video memory 56a to 56p Data read from one corresponding to the specified image channel is selectively output, so the data supplied to CLUT58 is instantly switched to the data of the specified channel in response to the change of the specified channel As a result, the reproduced image is instantaneously switched to the image of the designated channel.

Effects of the Invention As described in detail above, the image information reproduction processing device according to the present invention reproduces image data of a plurality of channels from a recording medium and temporarily stores them in a video memory.
A configuration is adopted in which image data for a specified desired one channel is read out of the image data stored in the video memory, converted into a video signal, and output. Therefore, according to the image information reproduction processing device of the present invention, it is possible to maintain good image display even during the image data switching operation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing a recording area of a composite disc, and FIG.
FIG. 4 is a diagram showing the types of modes when image information is recorded on the composite disc shown in FIG. 4, FIG. 4 is a diagram showing the configuration of a load transparency control table instruction, and FIG.
FIG. 6 is a diagram showing the correspondence between the bit pattern of the TCB and the mixing ratio. FIG. 6 is a block diagram showing a specific configuration example of the video format signal demodulation processing circuit 30 in the apparatus shown in FIG.
FIG. 7 is a block diagram showing an example of a specific configuration of the coded information signal demodulation processing circuit 31 in the apparatus shown in FIG. 1, and FIGS. 8 and 9 show the operation of the processor in the system controller 32 of the apparatus shown in FIG. FIG. 10 and FIG. 11 are diagrams showing images obtained by the apparatus of FIG. 1, FIG. 12 is a diagram showing a recording format of subcodes, and FIG. 13 is a diagram in a line graphics mode. FIG. 14 is a diagram showing the screen configuration in the TV graphics mode. FIG. 15 is a diagram showing the configuration of the light font foreground / background instruction. FIG. 16 is a diagram showing the load color. FIG. 8 is a diagram showing a configuration of a look-up table color 0 to color 7 instruction.

Continuation of front page (72) Inventor Osamu Watanabe 4-2610 Hanazono, Tokorozawa-shi, Saitama Prefecture Pioneer Corporation Tokorozawa Plant (56) References JP-A-59-26787 (JP, A) JP-A-62-229591 ( JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G11B 20/10 H04N 5/92

Claims (1)

(57) [Claims] An image information reproduction processing apparatus for reproducing recorded information from a recording medium on which a plurality of image data are recorded, wherein each of the image data is demodulated from a read signal read from the recording medium. Means for storing the image data in the video memory; image selecting means for selectively reading the specified image data from the plurality of image data stored in the video memory from the video memory; Means for generating and outputting a video signal based on the obtained image data.