Source: http://patents.com/us-5315400.html
Timestamp: 2013-12-08 21:57:06
Document Index: 673569005

Matched Legal Cases: ['art 60', 'art 60', 'art 72', 'art 72', 'art 72', 'art 72', 'art 60', 'art 60', 'art 60', 'art 57', 'art 72', 'art 60', 'art 60', 'art 60', 'art 72', 'art 60', 'art 72']

US Patent # 5,315,400. Method of recording and reproducing picture information, recording
United States Patent 5,315,400
A method of recording and reproducing picture information, a recording
medium on which the picture information is recorded, and an apparatus for
playing such a recording medium are disclosed. A video format signal and a
coded information signal are recorded in a first area of the recording
medium. Graphic codes including picture information occupying at least one
channel in a channel group of N (N being a natural number equal to or
greater than 2) channels are inserted as a subcode in the coded
information signal. Identification code information of at least one
channel is recorded in a second area of the recording medium. When the
recording medium is played, the identification code information is
displayed and a picture signal corresponding to the graphic code occupying
a channel designated by a picture channel command for designating one
channel in the channel group is mixed with the video format signal.
Inventors: Kurata; Junichi (Yamanashi, JP), Nomura; Satoru (Yamanashi, JP) Assignee:
Pioneer Video Corp.
08/065,036
Related U.S. Patent Documents Application NumberFiling DatePatent NumberIssue Date 860250Mar., 1992 247351Sep., 1988 Foreign Application Priority Data Mar 11, 1988
63-57401
386/246 ; 369/124.07; 369/275.3; 369/47.23; 369/53.31; 386/E5.012; 386/E9.043; 386/E9.045
Current International Class: H04N 9/802 (20060101); H04N 5/926 (20060101); H04N 9/82 (20060101); H04N 005/76 ()
Field of Search: 360/14.1-14.3,32,33.1,40,48 369/32,44.28,48,49,50,54,58,124,275.3 358/335,342,183,185,903 371/69.1 340/723
Other References "Audio", Mar. 1987, pp. 26, 28, 30.
."Electronics" Mar. 19, 1987, p. 53.
."Electronik" 1980, No. 21, pp. 107-114.. Primary Examiner: Young; W. R.
This application is a continuation of U.S. application Ser. No. 07/860,250
filed Mar. 27, 1992, abandoned, which is a continuation of U.S.
application Ser. No. 07/247,351, filed Sep. 21, 1988, now abandoned.
Claims What is claimed is:1. A method of recording and reproducing picture information on a recording medium having a lead-in area and a program area to be played after the lead-in area, the method
inserting a plurality of graphic subcodes including picture information in a coded information signal, wherein said graphic subcodes occupy at least one signal source channel in a signal source channel group of N channels where N is a natural
number greater than 1;
6. An apparatus for playing a picture information recording medium having a program area on which are recorded graphic subcodes in a coded information signal, wherein said graphic subcodes include picture information occupying at least one
signal source channel in a signal source channel group of N channels wherein N is a natural number greater than 1, said medium having a lead-in area on which identification code information of said at least one signal source channel of said graphic
subcodes recorded in said program area is recorded, said apparatus comprising:
mixing means for mixing with a video format signal said picture signal corresponding to the graphic subcodes occupying a signal source channel designated by a picture channel command for designating one signal source channel in said signal source
7. An apparatus as claimed in claim 6, wherein contents identification information indicating contents of said picture information occupying at least one channel is recorded in said lead-in area of said recording medium, and wherein said
apparatus further comprises means for displaying said contents identification information.
9. An apparatus as claimed in claim 6, wherein said video format signal is recorded in said program area of said picture information recording medium and wherein the apparatus further comprises video format signal demodulating means for
demodulating said video format signal from said pickup output signal.
10. An apparatus as claimed in claim 9, wherein said picture channel command is a command which has been inserted in said video format signal. Description BACKGROUND OF THE INVENTION
Systems are proposed in which picture information is recorded and reproduced in the form of the subcode on and from a digital audio disc having a diameter of 12-centimeters, generally designated as the Compact Disc. The subcode is made up of
eight subcode bits, and bit groups forming the subcode are divided into eight channels denoted respectively by letters P, Q, R, S, T, U, V, and W. In the method in which the picture information is recorded and reproduced in the form of subcode, data
corresponding to picture information is configured such that a symbol is formed by 6 bits of channels R through W out of the 8 bits forming the subcode, and 98 symbols are treated as one block, as illustrated in FIG. 1. Two symbols in the 98 symbols are
used as a sync signal, and 24 symbols obtained by dividing the remaining 96 symbols by four are treated as a minimum unit of data, i.e. a "pack", which constitutes one instruction of picture processing.
More specifically, the first symbol (referred to as symbol 0 hereinafter) of the 24 symbols indicates one of several modes. A symbol 1 following this symbol 0 forms instruction which indicates the sort of the instruction. Symbols 2 and 3
following the symbol 1 constitute a parity Q which is an error correction code. Symbols 4 through 19 following the parity Q constitute a data field, and include information such as color information. Finally, symbols 20 through 23 following the data
field constitute a parity P which is an error correction code for protecting the information in the "pack".
The number of "fonts" which can be displayed in the "line-graphics mode" is 48 in the lateral direction, and 2 in the column direction, and this area is designated as "the screen area". For providing the scroll function, a line of "fonts" is
added to the upper and lower outer peripheries and the right and left peripheries of the Screen area, to form a picture area having 50 "fonts" in the direction of row, and 4 "fonts" in the direction of column. The subcode is formed so that the picture
processing is performed by using a memory having addresses each corresponding to each pixel in this picture area. In addition, the area outside the Screen area is designated as "border".
area having 50 "fonts" in the direction of row, and 18 "fonts" in the direction of column, made by adding a line of "fonts" to the upper and lower peripheries as well as the right and left outer peripheries of the "screen area".
characters. Therefore, it is not possible to record and reproduce a picture with motion by means of the method explained above. In addition, since the number of colors which can be used in one shot of picture is at most 16 with the conventional method,
there has been a shortcoming that the reproduced picture obtained by that method is rather monotonous.
Therefore, if it is attempted to obtain a reproduced picture having variety by mixing a signal corresponding to the picture information recorded as the subcode and a video format signal generated separately, that will cause a sense of
incompatibility unless there is some mutual relationship between the picture information recorded as the subcode and the video format signal. As a result, it become necessary, for example, to synchronize timings of start of generation of the signal
corresponding to the picture information recorded as the subcode and the video format signal, by a manual operation. Thus, it was difficult to obtain a reproduced picture having variety which does not cause the sense of incompatibility.
The present invention is based on the point described above, and an object of the present invention is to provide a method of recording and reproducing picture information by which a reproduced picture having variety and causing no sense of
incompatibility is easily obtained.
A method of recording and reproducing on and from a recording medium picture information according to the present invention is characterized by the steps of recording, in addition to a video format signal and a coded information signal, graphic
codes including picture information which occupies at least one of N (N being a natural number equal to or larger than 2) channels, by inserting the graphic codes as the subcode of the coded information signal in a first area of the recording medium,
recording identification code information of at least one of the channels in a second area of the recording medium, and at the time of reproduction of the recording medium, displaying the identification code information, and mixing a picture signal
corresponding to graphic codes occupying a channel, which is designated by a picture channel command for designating one of the group of channels, in the video format signal. BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 29 is a diagram showing the arrangement of FIGS. 29A through 29C. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
As shown in FIG. 4, a code to be inserted as the symbol 0 is set in order to designate an additional mode, that is, "graphic mode with motion picture" in addition to the "zero mode", the "line-graphics mode", the "TV-graphics mode" and the
"user's mode" which are also used in conventional methods.
the group of pixels to which one of colors, which are registered as color number "0" through color number "15", is allotted. FIG. 6 shows a relationship between bit patterns of the codes TCB-0 through TCB-15 and the modes designating the mixing ratio,
instruction is an instruction having a structure illustrated in FIG. 7, and setting the contents of a color look-up table showing the color of preset color numbers or foreground/background color numbers. It is necessary to designate sixteen colors in
total. However, since four bits are used respectively for each of RGB to indicate a color, two symbols are required for setting one color. Therefore, eight colors are set by one Pack at most. With this circumstances, this instruction is divided into
brightest state.
having a row-address defined by the symbol 6 and a column-address defined by the symbol 7. For the pixels whose font data is "0", a color of a color number determined by the "color 0" is designated as a background color. For the pixels whose font data
a CD system encoder 6 through an error correction code adding circuit 5 which performs the interleave of the data, the error detection, and addition of codes for the error correction. To the CD system encoder 7, an output signal of the control signal
The channel R bits, for example, of the subcode recorded in the audio lead-in area has the same format as the channel Q bits as illustrated in FIG. 11. Specifically, the number of bits of the channel R in one subcode frame is 98 as in the case
of the other channels, in which 2 bits are used to form the sync signal and remaining 96 bits are divided into four fields, namely control field, address field, data field, and CRCC field.
The bits in the data field is used to form a code indicating the channel number of the picture channels 0 through 15, a code indicating the presence or absence of the picture information, and codes respectively corresponding to each character of
a character group having 8 characters representing the contents of the picture information.
On the other hand, channel designation data for designating the picture channel are inserted, as a control signal, in portions corresponding to predetermined horizontal scanning lines in the vertical fly-back period of the video format signal
recorded in the video area 20b.
FIGS. 13A through 13C show a disc player for playing a composite disc which has been explained above. As illustrated in these figures, a disc 20 is rotated by a spindle motor 21, and information recorded thereon is read-out by means of a pickup
22. The pickup 22 incorporates therein an optical system including a laser diode, an objective lens, and photo detectors, a focus actuator for driving the objective lens in a direction of its optical axis with respect to the information recording
signal outputted by the video format signal demodulating and processing circuit 30 is supplied to a video switch 33. In addition, the video format signal demodulating and processing circuit 30 is further provided with a separating circuit which
Specifically, during playback of the CD area, the playback RF signal is an EFM signal, which is subjected to frequency characteristic compensation by an equalizer circuit 36 having a predetermined equalizing characteristic, and is amplified at a
40, which has a higher gain than that of the amplifier 37. In this way, an EFM signal is derived whose frequency characteristic and amplitude are almost the same as the EFM signal obtained during CD area playback.,
The playback EFM signal selected by the selector switch 35 is supplied to an EFM demodulation circuit 42 which performs the demodulation process, to obtain a PCM data that is digital data including audio information of left and right channels
interpolation of erroneous data in the output data of the error correction circuit 45 by the average value interpolation method for example, when a correction inability signal is outputted. The error correction circuit 45 is configured to perform the
the correction inability signal when the error correction is not possible. The output data of the de-interleave and interpolating circuit 43 is supplied to a D/A (Digital to Analog) converting circuit 46. The D/A converting circuit 46 includes a
de-multiplexer which separates from each other the digital data of left and right-channel audio information combined by the time division multiplexing, and left and right-channel audio signals are reproduced. After their unnecessary components are
removed at LPFs (Low Pass Filters) 47 and 48, the reproduced left and right-channel audio signals are supplied to audio output terminals OUT.sub.1 and OUT.sub.2 through amplifiers 49 and 50.
On the other hand, in the subcode outputted by the EFM demodulating circuit 42, the bit of the channel R is supplied to the system controller 32 and a de-interleave and error correction circuit 52. Also, in the subcode outputted by the EFM
demodulating circuit 42, two bits of the channels P and Q are supplied to the system controller 32 only, and six bits of the channels R through W are supplied to the de-interleave and error correction circuit 52 only. In the de-interleave and error
correction circuit 52, the de-interleave of the six bits of the channels R through W and the error correction using the parity Q and P are performed. Output data of the de-interleave and error correction circuit 52 is supplied to a mode/instruction
decoder 53. The mode/instruction decoder 53 is configured to decode the mode represented by the three bits of the channels R through T of the symbol 0 of each pack, the mode designated by the item represented by the three bits of the channels U through
W of the symbol 0 of each pack, and the instruction represented by the six bits of the channels R through W of the symbol I of each pack, and to supply to each part signals respectively indicative of the modes and the instruction.
in the output data of the de-interleave and error correction circuit 52 by using the kind of the modes and the instruction indicated by the output of the mode/instruction decoder 53 and writing them in the corresponding addresses of the RAMs 56a through
56p, and for reading out sequentially in a predetermined order one memory content of the RAMs 56a through 56p corresponding to the picture channel designated by a channel designation data d outputted by the system controller 32 in accordance with
horizontal and vertical sync signals.
The data outputted by the picture memory device 55 is supplied to a color look-up table 58 (this table being referred to hereinafter as the CLUT). The CLUT 58 is configured to detect the "load CLUT color 0 through color 7" instruction and the
hold the color data corresponding to each color number, and configured to select and output color data of the color number designated by the data read-out from the picture memory 55.
The output data of this CLUT 58 is made up of three data respectively representing the level of one of the R, G, B color signals by using four bits. The three data outputted by the CLUT 58 and indicating the levels of the R, G, B color signals
the movable contacts u, u are in contact with the stationary contacts z, z. When, on the other hand, the movable contacts Z. z are in contact with the stationary contacts y, y, the mixing ratio is equal to M which is determined by the resistors R.sub.1
vertical sync signal v, and the control data c, the P-channel and Q-channel bits in the subcode outputted from the EFM demodulation circuit 42, disc designation information from a control part 60 indicating whether the disc to be played is a compact disc
or a composite disc, and mode designation information from the control part 60, indicating whether the reproducing area is only the CD area or the video area, or both CD and video areas in the case of the playback of a composite disc. In this system
controller 32, the processor executes processing of the signals inputted in accordance with programs previously stored in the ROM, and performs the control operation of each part of the video format signal demodulating and processing circuit 30, the
selector switch 35, a drive circuit (not shown) for driving the spindle motor 21, the driving circuit 71 for driving the slider motor, and the display part 72.
FIG. 13 is a block diagram showing a specific circuit construction of the video format signal demodulating and processing circuit 30. As shown, the RF signal from the RF amplifier 26 is demodulated at a demodulation circuit 75, then supplied to
of the video memory 83 in response to a write enable signal w which is outputted from the system controller 32. The data read-out from the video memory 83 is converted to an analog signal in a D/A (digital to analog) converter 86, and supplied through
the basis of the value of predetermined bits of the control signal portion for example, of the data block which is constituted by the Q-channel bits constituting the subcode in the read information (step S3). If it is judged that the disc being set is a
compact disc, then the execution directly proceeds to a CD playback mode (step S4) and a playback operation is continuously performed unless any command for the programmed music selecting operation for example has been issued. Since the playback
operation in the CD playback mode itself is well known, the explanation thereof is omitted here.
If it is judged in the step S3 that the disc being set is a composite disc, The processor judges whether or not the subcode graphics data is recorded (step S5), by using the code constituted by bits in the control field among the R-channel bits
constituting the subcode in the read-out information obtained by the step S2. If it is judged in the step S5 that the subcode graphics data is recorded, the processor detects and displays at a character display, for example, as the display part 72 the
channel number of the recorded picture channels and the group of characters composing a note which provides an explanation of contents (step S6), by using the codes constituted by bits in the data field among the R-channel bits which constitute the
subcode in the read-out information obtained by the step S2. In this step, if character display is not used as the display part 72, it is also possible to arrange such that only the channel number of the recorded picture channels is displayed. In such
a case, it is preferable to provide, for example, 16 LEDs respectively corresponding to the 16 picture channels in the display part 72, and to light-up only a part of LEDs corresponding to the recorded picture channels among the 16 LEDS.
After this step, the processor immediately accelerates the slider motor 21 to a maximum rated speed of rotation for the video area (step S7). At the same time, the processor moves the pickup 22 toward the outer periphery of disc at a high speed
by driving the slider motor 24 at a high speed (step S8).
After these operations, when it is detected that the pickup 22 has reached to the video area by the detection signal from the position detector 70 (step S9), the processor starts the playback operation of the video area (step S10). During video
area playback, the processor performs the control operation for writing the video information of at least one field (or one frame) long obtained from the disc in the video memory 83. This video information to be written may be, for example, first
information in the video area, or designated by an address designation through the key operation of the operation part 60. Along with these operations, the processor judges whether or not the picture channel designation code is in the control data c
outputted by the separator circuit 77 (step S11). If it is judged that there is the picture channel designation code, the processor supplies the corresponding data d to the memory control circuit 57 (step S12), and then judges as to whether or not the
playback of video area has completed (step S13).
If it is judged, in the step S11, that the picture channel designation code is not in the control data c, the processor judges as to whether or not the designation of picture channel is performed by the key operation in the control part 60 (step
S14). If it is judged that the designation of picture channel is performed, the processor supplies data d corresponding to the designated picture channel to the memory control circuit 57 (step S15), then proceeds to the step S13.
If it is judged, in the step S14, that the designation of picture channel by the key operation is not performed, the processor supplies data d corresponding to a predetermined picture channel to the memory control circuit 57 (step S16), then
proceeds to the step S13.
If it is detected in the step S13, that the playback of the video area has been completed, then the processor decelerates the spindle motor 21 to the maximum rated speed of rotation for the CD area (step S17). At the same time, the processor
drives the slider motor 24 at a high speed, to move the pickup 22 to the innermost peripheral position of the disc at a high speed (step S18). If it is detected (step S19) that the pickup 22 has reached the innermost peripheral position by the detection
output signal of the above mentioned detector switch (not illustrated), the processor starts playback operation of the CD area (step S20). Concurrently to this, the selector switch 80 in the video format signal demodulating and processing circuit 30 is
changed over by the processor to the position b thereby selecting and outputting the video information which was written in the video memory 83 during video area playback. Thus, playback of a still picture is performed during CD area playback.
During the playback of CD area, the processor judges whether or not the designation of picture channel is performed by the key operation in the operation part 60 (step S21). If it is judged that the designation of picture channel is performed by
the key operation, the processor supplies data d corresponding to the designated picture channel to the memory control circuit 57 (step S22), and judges whether or not the playback of CD area has been completed by the read-out of information in the audio
lead-out area (step S24).
If it is judged, in the step S21, that the designation of picture channel by the key operation is not performed, the processor supplies data d corresponding to the predetermined picture channel to the control part 57 (step S23), and proceeds to
the step S24.
In the step S24, if it is judged that the playback of CD area has not been completed, the processor again proceeds to the step S21. When, on the other hand, the completion of the CD area playback is judged, the processor initiate the driving of
the slider motor 24 to move the pickup 22 to its home position (step 25). Furthermore, a loading mechanism (not shown in the drawings) performs disc ejection, to complete the playback operating sequence.
In the operating sequence described above, playback of the information recorded in the CD area of the composite disc is performed in steps S17 through S24 after the playback of information recorded in the video area in steps S1 through S16. In
these operations, the channel number and the group of characters indicating the contents of the picture channels, in which picture is recorded as the subcode, are displayed in the display part 72 immediately before the start of the playback of video area
by the steps S5 and S6.
Therefore, it is possible to know before the start of the playback of the video area or the CD area the channel number and the contents of the pictures by the subcode which can be superimposed on the picture by the video format signal recorded in
the video area. In addition, the picture channel can be selected by the key operation of the operation part 60 through the steps S14 and S15 executed during playback of the video area, or through the steps S21 and S22 executed during the playback of the
CD area. Thus, desired picture can be easily selected.
When the "load CLUT color 0 through color 7" instructions and the "load CLUT color 8 through color 15" instructions are decoded by the mode/instruction decoder 53 during video area playback, data of designated 16 colors among 4096 colors are held
in the CLUT 58.
Subsequently, by the decoding of the "write font foreground/background" instruction etc., picture data of 16 channels are in turn stored in the RAM 56a through 56p in the picture memory device 55. In this state when one of the picture data of 16
channels is designated by data corresponding to the key operation in the operation part 60, picture data of the designated channel is sequentially outputted from the picture memory device 55, and in turn supplied to the CLUT 58. By this operation, color
data of a color number indicated by the picture data is then outputted from the CLUT 58. A video format signal based on this color data is outputted from the analog video converting circuit 65, and supplied to the video switch 33.
such as illustrated in FIG. 16 is made possible. Specifically, the mixing ratio is set to 100% for a portion corresponding to each pixel outside a region D of a picture A based on the video format signal outputted from the video format signal
outside the region D and and the portion of the picture B within the region D'.
In this way, it is possible to compose a picture as illustrated in FIGS. 17A through 17C, in which a translation of a dialogue, a musical score, or an explanation of a scene, etc., obtained from the subcode is inserted into a moving picture
By sequentially processing the signal read-out from the disc 20 in this way, pictures by the subcode which are related to the motion picture obtained by the video format signal can be superimposed on the motion picture by the video format signal
which are recorded by the FM modulation. Thus, a reproduced picture with variety and causing no sense of incompatibility can be easily obtained.
Furthermore, when the picture obtained by the subcode is inserted in the still picture obtained by using the video memory 83, the read-out of the information recorded on the disc 20 is performed continuously. Therefore, the picture obtained by
the subcode is played with the sound in the order of recording, and there will be no problem of generating the sense of incompatibility.
FIG. 17 is a diagram showing another embodiment of the present invention. In this embodiment, codes to be inserted as the symbol 0 are set for designating "extended ling-graphics mode" and "extended TV-graphics mode" in addition to the four
The composition of picture in the "extended line-graphics mode" is the same as in the "line-graphics mode", and an instruction designated by a "set TCW" (set Transparent Control Word) having a structure shown in FIG. 19, and an instruction
designated as "write font" shown in FIG. 20 are provided. The "set TCW" instruction is such an instruction in which each of the bits b.sub.0 through b.sub.7 of TCW represented by 8 bits of the channels T through W of the symbols 4 and 5 corresponds to
The composition of picture in the "extended TV-graphics mode" is the same as in the "TV-graphics mode", and this mode is provided with the instruction designated as "set TCW" illustrated in FIG. 21, and an instruction designated as "pre-set
memory" illustrated in FIG. 22. The "set TCW" instruction in the "extended TV-graphics mode" is such an instruction in which bits b.sub.0 through b.sub.15 of the TCW represented by 16 bits of the channels T through W of the symbols 4 through 7
The picture information recorded as the subcode using the recording format explained so far can be processed by making the configuration of the TCT 66 in the apparatus shown in FIGS. 13A through 13C such that data representing the mixing ratio is
In the embodiment described above, the number of bits of the instruction codes indicating the mixing ratio in each position of two-dimensional picture formed by the video format signal, is described as 1 or 2. However, the number of bits of this
instruction codes can be set to be any value as long as the number does not exceeds the bit number of the data field in one pack.
In the above, the present invention has been described by way of example in which graphic codes including picture information and instruction codes indicating the mixing ratio at each position of the two-dimensional picture formed by the video
format signal are recorded on a recording medium by inserting those codes as the subcode of the coded information signal. Now, explanation will be made for a case in which the graphic code including the picture information and instruction codes for
designating areas in the two-dimensional picture formed by the video format signal are recorded on a recording medium, by inserting those codes as the subcode of the coded information signal.
At first, as in the system illustrated in FIG. 18, codes to be inserted as the symbol 0 for designating "extended ling-graphics mode" and "extended TV-graphics mode" in addition to the four modes of "zero mode", "line-graphics mode", "TV-graphics
mode", and "user's mode" in the conventional system, are set.
The composition of picture in the "extended line-graphics mode" is the same as in the "line-graphics mode", and an instruction designated by a "set window" having a structure shown in FIG. 23 is provided. The "set window" instruction in the
"line-graphics mode" is an instruction for determining an area of rectangular form designated as "window" in a position on the picture designated by four bits of the channels T through W of the symbol 4. Since the "screen area" has only two rows of
"fonts" in the "line-graphics mode", the whole area of the "screen area" is designated as the "window", and only the position of the "window" in the vertical direction on the screen of CRT display is determined, as illustrated by the oblique lines in
FIG. 23. In addition, the mixing ratio is designated by two bits of the channels R and S of the symbol 4.
The composition of picture in the "extended TV-graphics mode" is the same as in the "TV-graphics mode", and there are an instruction designated as "set-window" illustrated in FIG. 25, an instruction illustrated in FIG. 26 which is a modification
of the "pre-set memory" instruction in the "TV-graphics mode", and an instruction illustrated in FIG. 27 which is a modification of an instruction designated as "pre-set border".
The "set window" instruction in the "extended TV-graphics mode" is an instruction in which an area of rectangular form designated as "window" is determined by the positions in the picture which are in turn defined by the symbols 6 and 7, and the
symbols 8 and 9. The position of a point (s.sub.x, s.sub.y) corresponding to the left-top corner of the "window" in the vertical direction is indicated, in "row" number, by five bits of the channels S through W of the symbol 6, and the position of the
point (s.sub.x, s.sub.y) in the horizontal direction is indicated, in "column" number, by six bits of the channels R through W of the symbol 7. On the other hand, the position of a point (e.sub.x, e.sub.y) corresponding to the right-bottom corner of the
"window" in the vertical direction is indicated, in "row" number, by five bits of the channels S through W of the symbol 8, and the position of the point (e.sub.x, e.sub.y) in the horizontal direction is indicated, in "column" number, by six bits of the
channels R through W of the symbol 9. By this "set window" instruction, an window such as illustrated by the oblique lines in FIG. 28 is determined in picture on the display screen.
In the area of "window" set by the above procedure, display is performed by using a signal obtained by mixing the video format signal obtained on the basis of the subcode, and a video format signal which is recorded with the digital signal
including the subcode by a multiplex recording after being processed by an FM-modulation, for example. The mixing ratio between these video format signals is designated to be one of 0%, 30%, 70%, and 100% by using two bits of the channels R and S of the
The "pre-set memory" instruction in the "extended line-graphics mode" is, like the corresponding instruction in the "line-graphics mode", an instruction by which the color of all "fonts" in the memory is determined to be one color in 16 colors of
the color numbers "0" through "16" which is designated by four bits of the channels T through W constituting the symbol 4, and the mixing ratio is determined to be a value designated by two bits of the channels R and S constituting the symbol 4.
The "pre-set border" instruction in the "extended TV-graphics mode" is, like the corresponding instruction in the "TV-graphics mode", an instruction by which the color of all "fonts" of the "border" portion in the memory is determined to be one
color in 16 colors of the color numbers "0" through "16" which is designated by four bits of the channels T through W constituting the symbol 4, and the mixing ratio is determined to be a value designated by two bits of the channels R and S constituting
the symbol 4.
FIGS. 29A through 29C show a disc player for playing a composite disc as illustrated in FIG. 10 carrying a digital audio signal as the coded information signal into which the subcode including the picture information is inserted in the manner
explained above. In these figures, the disc player is constructed generally the same as the disc player shown in FIGS. 13A through 13C, and the mutual connection is the same for various parts, i.e., the spindle motor 21 for driving the disc 20, pickup
22, slider 23, slider motor 24, transmission mechanism 25, RF amplifier 26, video format signal demodulating and processing circuit 30, coded information signal demodulating and processing circuit 31', system controller 32, video switch 33, operation
part 60, position detector 70, motor driving circuit 71, and display part 72.
In the disc player system of this example, however, the coded information signal demodulating and processing circuit 31' does not include the TCT 66 which is used in the disc player shown in FIGS. 13A through 13C, and the output data of the
de-interleave and error correction circuit 52 is also supplied to a window property memory device 90. The window property memory device 90 is made up of a RAM 91 having memory addresses corresponding to all "fonts" on the picture having 50 "fonts" in
the row direction and 18 "fonts" in the column direction, and capable of storing 2 bits of data in each memory address, and a memory control circuit 92. The memory control circuit 92 is configured to perform control operations of: detecting the data
indicating the position of window and the data indicating the mixing ratio, out of the data outputted from the de-interleave and error correction circuit 52, in accordance with the mode and the sort of the instruction indicated by the output of the
mode/instruction decoder 53; writing data indicating the detected mixing ratio in the memory addresses of the RAM 91 corresponding to the "fonts" in the window; writing data corresponding to the mixing ratio of 0% of the video format signal obtained from
the subcode in the memory address corresponding to the "fonts" outside the window, and sequentially reading-out the recorded contents of the RAM 91 in a predetermined order in accordance with the horizontal and vertical synchronizing signals h, and v.
Output data of this window property memory 90 device is supplied to a switch control circuit 93. The switch control circuit 93 is configured to supply a control signal corresponding to the mixing ratio of each "font", which is indicated by the output
data of the window property memory device 90, to the video switch 33.
On the other hand, in the video switch 33, the video format signal obtained from the subcode is directly supplied to a stationary contact v of a changeover switch 95, and also to stationary contacts x and y thereof through resistors R.sub.4 and
R.sub.5. No connection is made to the stationary contact z of the changeover switch 95. The changeover switch 95 is configured to selectively output one of the signals at the stationary contacts u, x, y, and z by moving a movable contact t thereof to
contact with one of the stationary contacts u, x, y, and z in accordance with the control signal outputted by the switch control circuit 93. On the other hand, the video format signal from the video format signal demodulating and processing circuit 30
is directly supplied to a stationary contact z of a changeover switch 96, and also supplied to stationary contacts y and x thereof through resistors R.sub.6 and R.sub.7. No connection is made to a stationary contact z of the changeover switch 96. The
changeover switch 96 is, like the changeover switch 95, constructed to connect a movable contact t to one of the stationary contacts u, x, y, and z in accordance with the control signal. The movable contacts t, t of the changeover switches 95 and 96 are
mutually connected with each other. A signal of mixture between the video format signal obtained from the subcode and the video format signal from the video format signal demodulating and processing circuit 30 is derived at the common connection node J
of the movable contacts t, t. When the movable contacts t, t of the changeover switches 95 and 96 are connected to the stationary contacts u, u, the mixing ratio of the video format signal obtained by the subcode becomes equal to 100%, and this mixing
ratio becomes equal to 0% when the movable contacts t, t of the changeover switch 95 and 96 are connected to the stationary contacts z, z. On the other hand, the resistance value of the resistors R.sub.4 through R.sub.7 are determined so that the mixing
ratio becomes equal to 70% when the movable contacts t, t are connected to the stationary contacts x, x, and it becomes equal to 30% when the stationary contacts t, t are connected to the movable contacts y, y. The signal derived at the common connection
node J is supplied to the video output terminal OUT.sub.3.
With the above described arrangement, the color data of the designated 16 colors out of the 4096 colors are also held in the CLUT 58 when the "load CLUT color 0 through color 7" instruction and "load CLUT color 8 through color 15" instruction are
decoded by the mode/instruction decoder 53.
Subsequently, picture data of 16 channels are stored in the RAMs 56a through 56p of the picture memory device 55 by the decode of the "write font foreground/background" instruction. When one of the color data of 16 channels is designated by a
data d based on the key operation in the operation part 60, picture data of the designated channel is sequentially outputted from the picture memory device 55 and in turn supplied to the CLUT 58. Consequently, the color data of the color number
indicated by the picture data is outputted from the CLUT 58. Then a video signal based on this color data is outputted from the analog-to-video converting circuit 65 and in turn supplied to the video switch 33.
In this state, if the "window set" instruction is decoded, data indicating the mixing ratio of 10% for the video format signal obtained from the subcode is stored in the memory addresses of the RAM 91 of the window property memory device 90
corresponding to the "fonts" outside the window designated by the "window set" instruction. Data indicating the mixing ratio designated by the "window set" instruction is written in the memory addresses corresponding to the "fonts" within the window. The data read-out from the RAM 90 of the window property memory device 91 is supplied to the video switch 33, so that the mixing ratio between the video format signal outputted from the analog-to-video converting circuit 65 and the video format signal
outputted from the video format signal processing circuit 30 is controlled for each "font". Thus, the same function as that in the disc player shown in FIGS. 13A through 13C is attained.
In addition, in the embodiment described above, the recording medium on which the subcode carrying picture information is recorded is a composite disc generally designated a CDV. However, it is of course possible to use, as the recording medium
on which the subcode carrying the picture information is to be recorded, other type of recording medium such as a disc designated as LDD, i.e., a disc on which an FM-modulated video format signal, an audio signal, and a digital audio signal are record by
In the description of the disc players of FIGS. 13A through 13C, and 29A through 29C, the R-channel bits including the identification code information of picture channels are supplied to the system controller 32, and the identification code
information is displayed by the displayed part 72. However, it is also possible to generate a video format signal corresponding to the identification code information by separately providing a decoder for decoding the identification code information,
and to superimpose the identification code information on the picture by the video format signal recorded in the video area, by mixing the generated video format signal with the signal derived at the junction j of the video switch 33.
It will be appreciated from the foregoing description, the recording and reproducing method according to the present invention is characterized by the steps of recording, in addition to a video format signal and a coded information signal,
graphic codes including picture information occupying at least one of N (N being a natural number equal to or greater than 2) channels, in a first recording area of a recording medium by inserting the graphic codes as the subcode of the coded information
signal, recording identification code information of at least one channel in a second area of the recording medium, displaying, at a time of playing of the recording medium, the identification code information, and mixing to the video format signal a
picture signal corresponding to said graphic codes occupying a channel designated by a picture channel command for designating one channel in the channel group. Therefore, one of a plurality of pictures obtained by the subcode which are related to the
picture by the video format signal can be selected without fail and in turn used for the superimposition by only sequentially processing the signal obtained from the recording medium. Thus, a reproduction picture having variety and causing no sense of
incompatibility, as well as being in accord with user's demand, can be easily obtained according to the present invention.