JP2600249B2 - Digital information signal recorded recording medium - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a recording medium on which a digital information signal is recorded,
In particular, the present invention relates to a recorded medium in which a graphics command for switching the hue (color) of a color display image is recorded together with a digital image signal and a digital audio signal.

2. Description of the Related Art Various digital audio discs in which a digital audio signal obtained by digitally modulating an analog audio signal is recorded in a predetermined format have been conventionally proposed. In a disk (CD), a data area called a subcode is provided for control and display in addition to a digital audio signal and error correction parity data, and a part of the data area is used for control. Was an empty area.

A format related to subcode data for displaying a song name, lyrics, a commentary, and displaying a graphics image according to the image of the song at the same time as playing a Hi-Fi music signal using this empty area is 1985. Year 2
The month was decided. This is generally referred to as CD graphics, and compact discs that are applied to the display of lyrics in karaoke are on sale.

First, the data format of the CD graphics will be described. FIG. 6 shows a signal format of one frame of a digital signal recorded on a compact disk, and includes a periodic signal, audio data (digital audio signal), and an error correction signal. Along with the parity, the sub code is synthesized in a time series of one symbol (= 8 bits).

FIG. 7 shows one data block configuration of the subcode.
The subcode is composed of 8 bits, and each bit is assigned a channel name of P, Q, R, S, T, U, V, W, respectively. Subcode channels P and Q are used as time codes and the like, and the remaining subcode channels R to W
Used as CD graphics. 8 shown in FIG.
Assuming that the sub-code data of one bit is one symbol, one data block of the sub-code is composed of 98 symbols as shown in FIG.
96 symbols excluding two symbols S ₀ and S ₁ are called a packet. Further, one packet is divided into four, and each of the divided 24 symbols is called a pack, and one operation (instruction) is executed using the pack as a basic unit.

FIG. 8 shows the basic structure of one pack. In the symbol 0, two information items, a mode and an item, are registered. The mode indicates what purpose data the pack is for, and three modes are currently defined. Generally, two modes are used, a mode "0" having no valid data and a mode "1" for transferring graphic data. The item indicates the target display device. Currently, the line display (item “0”) and the CRT
Display (item "1").

Symbol 1 is an instruction symbol, and is basically divided into six types of instructions. Preset memory (preset video RAM with one color), preset border (preset with one color in border area), light font (write data in two colors to specified font), EXOR font (specified font Color-number in EX-OR), load CLUT (set color look-up table), and soft scroll (soft scroll on screen).

In symbols 2 and 3, correction parities Q ₀ and Q ₁ of symbols ₀ and ₁ are arranged. A total of 16 symbols of symbols 4 to 19 are data fields, and necessary data is provided in a predetermined format according to the contents of the instruction. Furthermore,
Correction parity of symbols 0 to 19 is included in symbols 20 to 23
P ₀ , P ₁ , P ₂ and P ₃ are arranged.

The above is the outline of the data structure of the pack, and the display of characters and graphics images is realized by the combination of the packs of various instructions. Each symbol data in the pack is recorded on the disc in an interleaved manner to prevent a burst error. However, since this is not particularly related to the object of the present invention, the description is omitted.

Next, the screen format of the display device will be described. As described above, there are two types of display devices, a line display and a CRT display. However, a CR having a large display area and capable of full color display is available.
Since T-displays are widely used, a screen format for a CRT display will be described.

FIG. 9 shows a screen format for a CRT. The pixel configuration of the display area is 288 pixels in the horizontal direction and 192 pixels in the vertical direction. In terms of what is called, 48 fonts in the horizontal direction, vertical direction
It has 16 fonts. As can be seen from the pack configuration of the line font instruction shown in FIG. 10, this font has a configuration of 6 pixels in width and 12 pixels in height corresponding to a total of 12 symbols of 8 to 19 symbols. The font is displayed using this font as a reference unit.

In FIG. 10, "000110" of symbol 1 indicates that the instruction of this pack is a line font. In this case, CH0 and CH1 of symbols 4 and 5 indicate channel numbers, and T4 of symbols 4 and 5 COLOR0 and COLOR1 of 4 bits for each of ~ W indicate background and foreground color numbers, and ROW of symbol 6
Indicates the vertical font position in the screen shown in FIG. 9, and COLUMN of the symbol 7 indicates the horizontal font position.

One font data is arranged in a total of 12 symbols of symbols 8 to 19. When the data of each bit is "1", the color number of the pixel in the corresponding font is COLOR1 of symbol 5. On the other hand, when the data is “0”, the color number of the pixel in the corresponding font is the symbol 4
It becomes COLOR0. Therefore, the graphic display by the line font instruction has two colors in one font.

The above is the conventionally known subcode data R to W
The following is an outline of a format related to a conventional recording medium on which the subcode data R to W are recorded together with a digital image signal or the like (that is, in this case, C
A method of playing back the lyrics and displaying the lyrics on the screen and changing the color of the lyrics will be described.

FIG. 11 shows an example of a pack combination in which lyrics are displayed on a screen and the color of the lyrics is changed. The vertical direction in FIG. 11 indicates the time axis, each block indicates each pack, and the name inside the pack indicates the instruction of the pack. In Fig. 11, the instruction is loaded
The screen initialization 1 is performed by sequentially transmitting each pack of the CLUT, the preset memory, and the preset border, but the screen initialization is not limited to this method. Next, Fig. 11 shows 2 ₁ and 2
_As shown by ₂ ,..., The “line font” packs of the first line (for one line) are sequentially transmitted, and thereafter, similarly, the “line font” packs 3 ₁ , 3 ₂ ,. The “line font” packs 4 ₁ , 4 ₂ ,… on the line are transmitted, and finally x
The “line font” pack 5 at the end of the line is transmitted, and the lyrics are displayed.

Here, the "line font" pack for displaying the lyrics (characters) of each line has 48 fonts per line as shown in FIG. 9, so that 48 packs per line may be transmitted. Since the color specified by the "preset memory" pack at the time of the screen initialization 1 is displayed as it is without transmitting the "line font" pack, the color portion is normally transmitted by the number indicating only the character portion. . Therefore, the number of "line font" packs to be transmitted varies depending on the amount and complexity of the displayed lyrics.

The “line font” pack is transmitted in the format shown in FIG. 10, but since COLOR0 of the symbol 4 is the background color of the character, it is generally used in the “preset memory” pack of screen initialization 1. The used color number _C0 is used. Further, COLOR1 of the symbol 5 in FIG. 10 is the color of the character itself. For example, the packs 2 ₁ , 2 ₂ ,... For the _first line display are C ₁ , and the packs for the second line display.
3 _1, 3 _2, ... and so such C ₂ for, use different color number in row units (or clause units).

Furthermore, the ROW of symbol 6 and the COL of symbol 7 in FIG.
The UMN is provided with font coordinate values according to a desired display order according to the size of characters, whether the lyrics are written vertically or horizontally, and the like. In this way, the lyrics are displayed on the screen by combining a plurality of packs.

Thereafter, according to the music flow, after a pack of mode 0 is transmitted for a certain period shown by 6 in FIG. 11, "load CLUT"
Pack 7 is transmitted, and so on.
“Load CLUT” pack 9, Pack 0 of mode 0, “Load CLUT”
The color of the lyrics is transmitted in the order of UT "pack 11 and pack 12 of mode 0, and the displayed lyrics are switched every time the" load CLUT "pack is transmitted.

That is, the color lookup table (CLUT) is
In the case as shown in FIG. 12, the reproduction of the 0th "load CLUT" pack at the time of the screen initialization 1 in FIG. 11 causes the color number _C0 to become R (as shown by (0) in FIG. 12). Since the values of red), G (green) and B (blue) are all “0”, C ₀ is black and the other color numbers C ₁ to
C ₁₅ is a white R, G, the value of B is all "15".
Thus, as described above, the lyrics from the first line to the x-th line are displayed as white characters with black as the background color.

Then the reproduction of the first "load CLUT" pack shown in 7 in FIG. 11 after the lyrics display end of the, as indicated by in FIG. 12 (1), the first row of the color number C ₁ R , G, B
Is “15,0,0” and the other color number values are the same as when (0), so only the lyrics on the first line are changed from white to red, and the lyrics on the other lines are white characters Will remain.
Similarly, by playing back the “load CLUT” pack 9 in FIG. 11, as can be seen from (2) in FIG. 12, only the lyrics in the second line are changed from white to red, and As the lyrics are switched from red to white and then the "Load CLUT" pack 11 is played, as can be seen from (3) in FIG. Eye lyrics switch from red to white.

As another color changing method, there is a method of changing the already displayed lyrics to another color. In other words, basically, the pack combination used for the first display is used, but the “Line Font” pack with only the COLOR1 color number changed to a different color number is transferred again to display the first The color can be displayed in a different color from the color of the lyrics, and the color of the lyrics can be changed.

Problems to be Solved by the Invention However, in the former color change method of performing color change by transferring the “load CLUT” pack, the minimum unit of the color change is about a phrase, which is large, and the “line font” pack In the latter method of color change by re-transfer, the minimum unit of color change is reduced compared to the font size and the former, but smooth color change is difficult. The colors are changed in line units. Therefore, conventionally, there has been a problem that color change cannot be smoothly performed in synchronization with the flow of music such as a video disk.

In view of the above, in view of the above, in the present invention, a graphics command that enables an analog color change of a display image such as a lyrics or a musical score in synchronization with music is recorded together with a digital image signal and a digital audio signal. To provide a recording medium on which a digital information signal is recorded.

Means for Solving the Problems A recording medium on which a digital information signal is recorded according to the present invention has a pixel color code having a plurality of pixel widths and a pixel color code indicating another color gradually in a certain direction of a display image. Are recorded intermittently or continuously in synchronization with the modulated audio signal of the digital audio signal.

Operation When the recording medium of the present invention is reproduced, a reproduced audio signal based on a digital audio signal is obtained, and a reproduced image based on a digital image signal is displayed in a color (hue) specified by a graphics command. Here, since the graphics command is recorded by changing the pixel color code to a pixel color code having a plurality of pixel widths and gradually indicating another color in a certain direction of the display image, the graphics command is reproduced. As a result, the color of the reproduced image is smoothly switched in units of a plurality of pixels.

Further, since the change of the pixel color code is recorded intermittently or continuously in synchronization with the modulated audio signal of the digital audio signal, when reproduced, the color of the display image is synchronized with the reproduced audio signal. Can be replaced.

Embodiment FIG. 1 shows an embodiment of a change in color change of a character image by a graphics command recorded on a recording medium of the present invention, and FIG. 2 shows an embodiment of a data structure of the graphics command in FIG. Here is an example. In this embodiment, an “EXOR font” pack is recorded as a graphics command. In this embodiment, the number of packs is 300 per second,
In other words, 10 packs of recording are performed every frame (1/30 second). In these 10 packs, the color change is performed with the “EXOR font” pack, and the remaining packs in 10 packs display and erase characters. Perform

This “EXOR Font” pack is a “Line Font”
The instruction part of the symbol 1 of the pack is "0001
The only difference is that it has been changed from "10" to "100110". Other than that, the structure of the "Line Font" pack is the same, except that the pixel corresponding to the "0" part in the data field is currently Is rewritten to the color number by EXOR (exclusive OR) of the color number of COLOR0 and the color number of COLOR0, and the pixel corresponding to the "1" part in the data field is the color number of COLOR1 and the current color number This is a graphics command for rewriting to color numbers by EXOR.

In the present invention, recording for displaying a display image (for example, lyrics) on a screen is performed by recording a “line font” pack as before, but the above “EXOR font” is used to change the color of an image after image display. Pack is recorded. Here, the display form of lyrics as an example of a display image varies depending on the combination of vertical, horizontal, character size, etc. First, here, in the case of one character having one font size of 6 pixels in width and 12 pixels in height. Will be described.

FIG. 3A shows an example of one character in a vertically written character string. Each pixel color code (color number) of 6 pixels horizontally and 12 pixels vertically constituting one character is obtained by an “EXOR font” pack. First, the color code of a plurality of pixels related to the character among the six pixels of the symbol number 8 shown below is changed to a desired one color pixel color code, and the color code of the six pixels of the symbol number 9 shown below is related to the character. "EXOR font" pack in which the color code of a plurality of pixels to be changed is changed to a pixel color code of a desired color, and the pixel color code is changed in the same manner in the order of a symbol number →→... But continuously or intermittently a total of 12 times,
It is recorded on the recording medium of the present embodiment (here, a compact disk).

Thus, in the case of a vertically written character string, the color can be sequentially changed from top to bottom. Also, this color change is "EXOR
Since the font "pack" is recorded in synchronization with the modulated audio signal of the digital audio signal recorded on the compact disc, the color change of the displayed image is performed in synchronization with the reproduced audio signal.

The present invention FIG. 4 is shown in FIG. 3 (A), the color number and the pixel indicated by a white circle displayed in a first color based on (color code) C _0, the second based on the color number C ₁ pixels indicated by a black circle up to the third line of characters consisting of a pixel indicated by × mark displayed in color (third pixels from the top), rewriting the third color based from color number C ₁ to C ₂ Here is an example of a character structure in which color change is in progress.

On the other hand, in the case of a horizontally written character string, as shown in FIG. 3 (B), of the 12 pixels of the leftmost first bit (bit number R) shown in FIG. The color number is changed to the pixel color number of another color by recording the “EXOR Font” pack. Thereafter, similarly, as shown in FIG. 3 (B), S → T
Since an “EXOR font” pack that sequentially changes the pixel color numbers of the pixels related to the characters in the order of → U → V → W is recorded, the color of the displayed image when the compact disc is reproduced by the reproducing device is changed. The order is from left to right.

In one embodiment of the recording medium of the present invention, an "EXOR font" pack is recorded as shown in FIGS. 1 and 2 for the above color change. It is now assumed that the numeral "1" is displayed as shown by 15-0 in FIG. 1 (A) by six horizontal pixels and twelve vertical pixels, the color number of the background color is C ₀ , and the character color is color number is C _1, it is assumed that color changing the text color to C ₂ of. In this case, the pack in mode 0 is synchronized with the flow of the music signal as shown in FIG.
-1 and "EXOR font" pack 17-1 is recorded at a predetermined timing as shown in FIG.

This "EXOR font" pack 17-1 is a character image 15-0.
Is a graphics command for causing the pixels involved in the display of characters on the first line to be changed in color.
FIG. 7A shows the data structure. In FIG. 2A, “100110” of symbol 1 of pack 17-1 indicates that the instruction of pack 17-1 is an EXOR font, and the data of COLOR0 of symbol 4 is “000”.
0 ", the data of COLOR1 symbol 5 is" C ₁ C ₂ ", further of 1 font data in total 12 symbols of the symbol 8 to 19, the first line of the character image 15-0 in the character display Two bits of T and U of symbol 8 which are data bits corresponding to the pixel concerned are “1”, and all other bits are “0”.

By playing back the “EXOR font” pack 17-1 having the data structure shown in FIG. 2A recorded in this way, the pixels of the character portion of the first line by the two bits of T and U of the symbol 8 become: current color number C ₁ and pack 17-1
Will be displayed in a color based on the color number of C ₂ (= C ₁ (C ₁ C ₂ )) which is exclusive-ORed with the color number C ₁ C ₂ of the symbol 5 of the symbol 5 the portion of the background color _{C 0 (= C 0 0)} , the character portion of the line other than the first line remains the same as C ₁ (= C ₁ 0), and the initial character image 15-0.

Accordingly, by the reproduction of the pack 17-1, the display image becomes as schematically shown by 15-1 in FIG. 1 (A), and the pixels of the character portion of the first line indicated by the black background have the desired color number. is displayed in the color of the C _2, and displayed on the first pixel of the character part of the line other than the line is the same as the character portion of the initial character image 15-0 pixel color color number C ₁ shown in × mark Is done.

Next, after the pack of the instruction of mode 0 is recorded for a certain period as shown by 16-2 in FIG. 1B, at a predetermined timing, as shown in FIG.
The pack 17-2 is recorded. This "EXOR font" pack 17-2 is a graphics command for changing the color of pixels involved in the character display of the second line of the character image 15-1, and its data is shown in FIG. 2 (B). The structure is shown.

The “EXOR font” pack 17-2 shown in FIG. 2B has substantially the same data structure as the “EXOR font” pack 17-1 shown in FIG. Among the data of one font, the pack 17-2 is a symbol 9 which is a data bit related to the character display of the second line.
Is different from the pack 17-1 in that three bits of S, T and U are "1" and all other bits are "0".

Thus, as can be clearly inferred from the above description, at the time of reproduction, the pixels of the character portion of the second line are C ₂ (= C ₁₎ by the reproduction of the “EXOR font” pack 17-2.
(C ₁ C ₂ )) will be displayed in a color based on the color number, and the other pixels will have a background color of C ₀
(= C ₀ 0), and the character part after the third line is C ₁ (= C ₁
0), the character portion of the first line is displayed in C ₂ (= C ₂ 0), and the same character image 15-1 of the color number color.

Accordingly, by the reproduction of the pack 17-2, the display image becomes as schematically shown by 15-2 in FIG. 1 (A), and the pixels of the character portions of the first and second lines indicated by the black background are respectively shown. It is displayed in the color of the color number C ₂ desired, and, ×
The three lines of characters of the portion of the 12 lines of pixels shown by the symbol is displayed in the color of the color number C ₁ of the portion of the character pixels and the same initial character image 15-0.

Thereafter, as shown in 16-3 in FIG. 1B, an appropriate number of packs of mode 0 instructions are recorded in synchronization with the progress of the music signal, and then the third of the character image 15-2 is recorded.
An "EXOR font" pack 17-3 is recorded for changing the color of the pixels involved in the display of characters on the line. For this reason, at the time of reproduction, this "EXOR font" pack is reproduced as 17-3, so that the displayed image becomes 15-
3 As shown schematically, the first to third character portion of the line of pixels shown in black are displayed in the color of the color number C ₂ desired.

Hereinafter, in the same manner, recording of packs of an appropriate number of mode 0 instructions and recording of an “EXOR font” pack for changing colors of pixels of a predetermined one-line character portion are alternately repeated. EXOR font "pack 17-12" is recorded.

FIG. 2C shows the data structure of the pack 17-12, in which the symbols 19 related to the character display of the twelfth line are displayed.
The four bits of S, T, U and V are "1", and the other bits of the symbols 8 to 19 are all "0".
Only the character portion of the line pixel switching despite the color by color number C _2, pixels of the other image portions are held in the color of the immediately preceding. After the recording of the pack 17-12, the pack of the mode 0 instruction is recorded until the next color change is started, as indicated by 16-13 in FIG. 1B.

As a result, when playing a compact disc of this embodiment, the first color number from the color by color number C ₁ downward from above the color of the character image 15-0 pixel in synchronization with the music line by line C _The character image 15-0 is sequentially switched to the second color by the reproduction of the twelfth "EXOR font" pack 17-12 indicated by 17-12 in FIG. Fig as shown schematically in 15-12 (a), all the character portion pixels switched to the second color by color number C ₂ desired.

Although the above description has been given of a case where one character is composed of one font, the present invention can be similarly applied to a case where one character is composed of a plurality of fonts.

5 (A) and 5 (B) show that one character is 24 pixels wide and 24 pixels long.
FIG. 5 (A) is an example of a case where the font is composed of a total of eight fonts (F1 to F8) of pixels, and a color change is performed when characters composed of these eight fonts are displayed in vertical writing, for example.
As shown in the figure, first, the "EXOR font" pack is recorded for the color change of 6 pixels on the first line of the font F1, and then the "EXOR font" pack is changed for color change of the 6 pixels on the first line of the font F2. The pack is recorded, and so on. In the same manner, 6 pixels on the first line of the font F3, 6 pixels on the first line of the font F4, 6 pixels on the second line of the font F1,. An "EXOR font" pack for color change is recorded in the order of pixels, 6 pixels on the first line of font F5, 6 pixels on the first line of font F6, and so on.

In this case, for example, four "EXOR font" pixels are continuously recorded so that a total of 24 pixels on the same line are continuously changed, and thereafter, until a total of 24 pixels on the next line are changed, A mode 0 pack is recorded in an appropriate amount in synchronization with music.

When a plurality of characters consisting of 8 fonts are written horizontally, as shown in FIG. 5B, the "EXOR font" pack is the leftmost font of the font F1 as described with reference to FIG. 3B. “EXOR Font” pack for changing color of 12 pixels in a vertical column, one row in the leftmost column of font F5
“EXOR font” for color change of 12 pixels is recorded in the order of the pack, and “EXOR font” for color change of 12 pixels in a vertical column in the same manner in the following order
Packs are recorded sequentially.

According to the present invention, the display image of the digital image signal is not limited to the above-mentioned numbers and characters, but it is also possible to perform the display of musical notes (scores) and commentary characters and the color change of graphic images in the same manner.

The graphic image also includes a part of the background surrounding the character itself, as shown in FIG. 13 described later. In this case, an "EXOR font" pack for color change is recorded on a recording medium (compact disk) in the same manner as in the above embodiment so that only a part of the background is changed in color in synchronization with music. Here, FIG. 13 shows an embodiment of a change of color change within one font by a graphics command recorded on a recording medium according to the present invention.

That is, in the description of the embodiment of the color change according to the present invention with reference to FIGS. 1 to 5, the place where the color change is performed in synchronization with the music is the character itself. That is, (A) of FIG.
From (C) to EXOR Font Pack Symbol 8
Are represented by a part (one line) of the character itself, that is, the first line (A), the second line (B),..., The twelfth line (C) of the character itself. ). Here, for example, it is assumed that the data of the symbol 8 is inverted in FIG. Specifically, assuming that “001100” of the symbol 8 of the EXOR font pack in FIG. 2A is “110011”, the color of the surrounding portion located on the first line of the character itself is changed to another color. Will be. Similarly, assuming that the data “011100” of the symbol 9 in FIG. 9B is “100011”, the color of the surrounding portion located on the second line of the character itself is the same as the data “1111100” in FIG. Assuming that “0111110” is “100001”, the color of the surrounding portion located on the twelfth line of the character itself is changed to another color.

In this way, simply changing the data of the symbols 8 to 19 in the EXOR font pack makes it possible to easily change the color change location from the character itself to the surrounding portion of the character.

FIG. 13 shows this state. (A) shows the state before the color change in one font, and (B) shows the color change of several lines in one font in the surrounding portion of the character itself. (C) is a state in which the color change of several lines in one font is performed in the surrounding area of the character itself from the state of (B), and (D) is the color of the surrounding area of the character itself in one font It shows the state after the replacement.

As described above, according to the present invention, a graphics command for changing a color number (pixel color code) in a plurality of pixel width units smaller than one font size is recorded. On the side, the display image can be gradually switched in a fixed direction in synchronization with the reproduced audio signal, and the display colors can be smoothly switched in synchronization with the reproduced audio signal in the same manner as a video disc. is there.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing an embodiment of recording timing of a graphics command of the recording medium of the present invention and a state of color change of a display image. FIG. 2 is a diagram showing a data structure of the graphics command in FIG. FIG. 3 is a diagram showing one embodiment, FIG. 3 is a diagram showing a color change direction, FIG. 4 is a diagram showing a state in which color change of one character is in progress, and FIG. 5 is another example of a color change order. FIG. 6, FIG. 6 is a diagram showing an example of a signal format of a CD to which the present invention can be applied, FIG. 7 is a diagram showing one data block configuration of a subcode, FIG. 8 is a diagram showing a basic configuration of one pack, FIG. 9 is a diagram showing an example of a CRT screen format, FIG. 10 is a diagram showing the structure of a “line font” pack, FIG. 11 is a diagram illustrating an example of a conventional color changing method,
FIG. 12 is a view showing an example of the contents of a color look-up table according to the method shown in FIG. 11, and FIGS. 13 (A) to 13 (D) are diagrams showing a reproduced image according to another embodiment of the present invention before color change in one font. FIG. 6 is a diagram showing states during color change and after color change. 15-0 to 15-12... Display image, 16-1 to 16-13... Mode 0 pack transmission period, 17-1 to 17-12... "EXOR font" pack.

Claims (3)

(57) [Claims] 1. A digital information signal recording device for recording a digital audio signal and a digital image signal together with a graphics command for displaying each pixel of a display image of the digital image signal in a color based on the pixel color code. A graphics command for changing the pixel color code to a pixel color code having a plurality of pixel widths and gradually indicating another color in a certain direction of the display image on the recording medium. A recording medium on which a digital information signal is recorded, intermittently or continuously recorded in synchronization with a modulated audio signal. 2. The recording medium according to claim 1, wherein the display image is a character and a background, and the color of the character itself is switched in a character string direction. 3. The display image includes a character and a background, and the color of a background portion in a font of a reference unit including the character itself and surrounding the character itself is switched in a character string direction. A recording medium on which a digital information signal is recorded according to claim 1.