JPH0968991A - Text display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display text with high-grade characters and to smooth the color change at the time of reproducing music tone by a so-called CD-G. SOLUTION: This text display device has a character recognition section 24 which recognizes the text to be displayed by the packs of sub-codes in character units and converts the text into codes, a text memory section 2 which previously stores the text, a text matching section 27 which specifies the character strings of the text stored in the text memory section 26 from the recognized character strings and outputs these codes and a text generating section 29 which reads the character codes outputted out of an outline font dictionary 30 for storing the external shapes of the characters with vector data, develops the character codes and stores the codes into a V-RAM 31. The text generating section 31 overwites the character parts from the left with red according to the color change sequence data by the detected packs if the two packs instructing the color change are detected in the case one character is displayed by the packs for two lines.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a so-called CD-G.
The present invention relates to a lyric display device for karaoke, which displays lyrics in high-quality characters and smoothly changes the color when reproducing music.

[0002]

2. Description of the Related Art In a so-called compact disc (CD), a data area called a subcode is provided in addition to an area for recording a digital audio signal and parity data for error correction. And, part of it was used for control, but the rest was empty. Therefore, there is a standard concerning subcode data in 1985 for the purpose of displaying a music title, lyrics, a commentary, and displaying a graphics image in accordance with the image of a song at the same time as reproducing an audio signal by utilizing the empty area. Determined in the year. This standard is commonly referred to as CD graphics (CD-G). By using this CD-G, it is possible to display the lyrics of the reproduced song and change the color of the displayed lyrics in accordance with the reproduction of the audio signal. This makes it possible to visually recognize the progress of the music, which is particularly suitable for a karaoke device.

The signal format of this CD-G will be described. FIG. 2 shows a signal format for one frame among digital signals recorded on a CD. As shown in this figure, in one frame, a synchronization signal,
Subcodes of 1 symbol (= 8 bits) are arranged in time series together with audio data (digital signal) and parity for error correction. Here, the one-block data structure of the subcode is shown in FIG. The subcode is composed of 8 bits, and channel names P to W are given to each. Subcode channels P and Q are
The remaining channels R to W are used for CD-G because they are used as a signal indicating a music interval, a time code, or the like. Assuming that the 8-bit subcode data shown in FIG. 2 is one symbol, one subcode data block is shown in FIG.
As shown in FIG. 9, it is composed of 98 symbols, of which 96 symbols excluding 2 symbols of subcode syncs 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. Then, with such a pack as a basic unit, 1
One operation (instruction) is executed.

FIG. 4A shows the basic structure of one pack.
First, in the symbol number 0, two pieces of information of mode and item are recorded. Here, the mode indicates what purpose the data of the pack is, and in general, the mode "0" has no valid data.
Or mode "1" for transferring graphic data, MI
A mode such as a mode "3" for transferring DI data is used. The item is an item for instructing a target display device, and mainly includes two items, a line display (item "0") and a CRT display (item "1"). Next, in the symbol number 1, instruction symbols are recorded, and basically they are roughly classified into the following 6 types. That is, preset memory (preset with one color), preset border (preset border area with one color), light font (write data in specified font with two colors), EXOR font (within specified font) There are six types: color number is changed by exclusive OR, load CLUT (set color lookup table), and soft scroll (soft scroll of screen).

In the symbol numbers 2 and 3, the correction parities Q ₀ and Q ₁ of the symbol numbers ₀ and ₁ are arranged, respectively. In addition, data corresponding to the content of the instruction is recorded in a predetermined format in 16 symbols of symbol numbers 4 to 19. That is, such 16 symbols are used as a data field. Correcting parities P _{0 to} P ₄ having symbol numbers _{0 to} 19 are arranged in the symbols 20 to 23, respectively. The above is the outline of the data structure of the pack, and by combining the packs of various instructions, the display of characters and graphic images is realized.

Next, the screen format in the display device will be described. As described above, there are two types of display devices, that is, a line display and a CRT display, but in general, the latter has a large display area, and the latter capable of full-color display is widely adopted. Therefore,
The screen format for the CRT will be described. FIG. 5 shows a screen format for a CRT, and the display area has 288 pixels in the horizontal direction and 192 pixels in the vertical direction. When such a display area is expressed by a font called 6 pixels in the horizontal direction and 12 pixels in the vertical direction, it is 4 in the horizontal direction.
8 fonts and 16 vertical fonts. This font has 12 symbols of symbols 8 to 19, as can be seen from the pack structure of the light font instruction described later.
The size of the symbol is 6 horizontal and 12 vertical. Therefore, the graphics are displayed with the font as a reference unit.

By the way, when displaying characters such as Chinese characters and hiragana such as lyrics on the screen, it is considered that the resolution is not sufficient because one character is displayed with 6 pixels wide and 12 pixels wide. Generally, as shown in FIG. 6, one character is represented by eight fonts in two rows and four columns. Therefore, the characters displayed on the screen are substantially represented by a dot matrix of 24 × 24 pixels.

Next, the case of displaying characters such as lyrics on the screen will be described. In this case, the data structure of the pack (particularly the data field structure) is as shown in FIG.
It will be as shown in. In FIG. 4B, “000110” of the symbol number 1 indicates that this pack has the light font instruction. In this case, among the symbol numbers 4 and 5, CH0 and CH1 composed of 2 bits of R and S respectively represent channel numbers, and the remaining COLOR0 and COLOR1 composed of 4 bits of T to W are respectively in the foreground. , Shows the background color number. Furthermore, the ROW with the symbol number 6 is displayed on the screen (Fig. 5).
(Refer to FIG. 4), the font position in the vertical direction is shown, and COLUMN of the symbol number 7 shows the font position in the horizontal direction.

Data for one font is arranged in 12 symbols of symbols 8 to 19. When the data of each bit is "1", the color number of the corresponding pixel is designated in COLOR1 of symbol number 5. On the other hand, when the data is "0", the color number of the corresponding pixel is designated as COLOR0 of the symbol number 4, and the pixel is displayed with the designated color number. Therefore, the graphics display by the light font instruction has two colors in one font.

Next, a method of displaying lyrics on the screen by using the subcode data R to W and changing the color of the lyrics will be described. There are various methods for changing colors, but here, a method for changing the already displayed lyrics with another color will be described. FIG. 7 and FIG.
It is a figure which shows an example of the pack structure for displaying lyrics on a screen and changing its color in this way.
It should be noted that the vertical axis direction of these figures indicates the time axis, each block indicates each pack, and the name inside thereof indicates the instruction of the pack.

[0011] First, in FIG. 7, the load CLUT, preset memory, and by is sequentially transferred each pack ₁ 1 to 1 ₃ of the preset border, the screen initialization 1 is performed. The screen initialization is not limited to this method.

Next, the first line of the first line of the lyrics
In order to display characters, "write font" Pack 2 ₁ to 2 ₈ for displaying the eight parts of the character are sequentially transferred. Specifically, in FIG. 6, the "light font" pack 2 ₁ corresponding to the character portion is transferred, and then the "light font" pack 2 ₂ corresponding to the character portion is transferred. moiety, ..., corresponding to the portion "write font" pack 2 _{3-2 8} are sequentially transferred.

Here, the "light font" pack is transferred in the format shown in FIG. 4B. Since COLOR0 of the symbol number 4 becomes the background color of the character, it is generally the screen initialization. The color number C ₀ specified in the "preset memory" pack 1 ₂ in 1 is used. On the other hand, COLOR1 of the symbol number 5 in FIG. 4B has the color of the character itself, and therefore the color number C ₁ different from C ₀ is used. Note that, for example, the color number C ₀ is black and C ₁ is white. In addition, the symbol number 6 in FIG.
The font coordinate values according to the display order are given to the ROW and the COLUMN of the symbol number 7. For example, in the first line of the lyrics, in which the first one character is to be displayed, in the screen coordinates (unit is font) shown in FIG. 5, the upper left corner is (x ₀ , y ₀ ) and the lower right corner is ( x ₀ +
1, y ₀ +3)
ROW in “Light font” pack 2 ₁ is “x ₀ ”
And COLUMN is “y ₀ ”. The ROW in the "light font" pack 2 ₂ is "x ₀ +1" and the COLUMN is "y ₀ ". The ROW in the "light font" pack 2 ₈ is "x ₀ +1" and the COLUMN is "y ₀ +3". Such, the "write font" Pack 2 ₁ to 2 ₈ are transferred, aligned data types one 24 × 24 pixels needed to display a character on the screen, the two rows and four columns One character in the font is displayed in black with the specified color number at the predetermined coordinates.

Next, in order to display the next second character on the first line of the lyrics, "light font" packs 2 ₉ to 2 ₁₆ for displaying 8 parts of the character are sequentially transferred. It And this kind of operation is called "light font"
When the pack 2 _8x is transferred and repeated until it corresponds to the lower right part of the last character on the first line, the lyrics on the first line are displayed on the screen. Further, in the same manner, the “light font” pack 3 ₁ ... Is transferred and the lyrics of the second line are displayed. The same operation is performed on the y-th
When repeated until the "light font" pack 5 for displaying the lower right part of the last character of the line is transferred, the lyrics of lines 1 to y are designated by the background color by the color number C _0. The characters are displayed on the screen as black and the characters themselves as white designated by the color number C ₁ .

When the lyrics are displayed on the screen in this manner, the color change operation of the lyrics shown in FIG. 8 is performed in accordance with the progress of the song by the reproduction of the audio signal. First, during the period A until the progression of the song reaches the first first character in the lyrics of the first line, the pack of mode “0” (that is, the mode in which there is no valid data) continues to be transferred, and the first first "Light font" at the time when it reaches the character
The packs 12 ₁ and 12 ₂ are transferred. Here, the “light font” packs 12 ₁ and 12 ₂ are the same except that the COLOR _{1 of} the “light font” packs 2 ₁ and 2 ₂ corresponding to the left ¼ part of the character and the color number C ₂ respectively. It is a thing. Where color number C ₂
Indicates the color of the lyrics that changes in accordance with the progression of the song, and a red-based color such as orange is generally used, but here it is red for convenience of explanation. As a result, the characters displayed in white as shown in FIG.
As a result of being overwritten with red, as shown in FIG.
Only 1/4 of the color on the left will be changed.

Next, in the period B, the pack 6 of the mode "0" is continuously transferred, and then the pack 1 of the "light font" is written.
2 ₃ and 12 ₄ are transferred. "Light font" pack 1
2 ₁ and 12 ₂ are the same except that COLOR _{1 of} the “light font” packs 2 ₃ and 2 ₄ corresponding to the character portion is the color number C ₂ . Therefore, as a result of further overwriting the part with red, as for the display state of the characters, the left half is color-changed as shown in FIG.

Similarly, in the period C, a pack of mode "0" is continuously transferred and then "light font" is transferred.
The packs 12 ₅ and 12 ₆ are transferred, and further, in the period D, the pack of the mode “0” is continuously transferred, and then the “light font” packs 12 ₇ and 12 ₈ are transferred. "Light Font" pack 12 _{5-12 8,} since they are identical except that the COLOR1 each "write font" Pack 2 _{5-2 8} and color number C _2, the display state of the character, Fig 9 (d As shown in FIG. 9B, the characters up to the left 3/4 become red, and as shown in FIG. 9E, the colors are all changed to red. Here, period B to C
Is appropriately determined by the length of the note assigned to the display character. As a result, when the progression of the song reaches the first character in the lyrics on the first line, the character is gradually divided from the left by 1/4 and turned red.

After that, the pack of mode "0" continues to be transferred until the progression of the tune reaches the next second character on the first line of the lyrics, and at that time, the character is changed in color. Therefore, "light font" packs 2 ₉ to 2 ₁₆ are sequentially transferred in pairs. Then, when such an operation is repeated until the "light font" pack _128x is transferred, all the characters of the lyrics of the first line are changed in color.
Then, the same operation is performed for the lyrics 2 to y of the lyrics already displayed.
.., 15 are transferred as a set of two "light font" packs 13 ₁ , ..., 14 ₁ ,.

With such a transfer, the characters of the lyrics already displayed are changed from left to red in accordance with the progress of the song, so that even if the song is unknown, the correspondence between the song progression and the lyrics is visually visible. It is known to.

[0020]

By the way, in the above-mentioned structure, the characters displayed on the screen are expressed by 24 × 24 pixels because a font consisting of 2 rows and 4 columns is used. For this reason, when displayed on a large screen, so-called jagged characters are conspicuous. Therefore, for example, if 18 fonts of 3 rows and 6 columns are used to represent characters with 36 × 36 pixels, such a problem seems to be solved at first sight. However, in the case of expressing characters using such a large number of fonts, the number of characters that can be displayed on one screen will decrease because the screen configuration (see FIG. 5) is standardized. There's a problem.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to display lyrics with high quality without reducing the number of characters that can be displayed on one screen. To provide a device.

[0022]

In order to solve the above-mentioned problems, the invention according to claim 1 is to reproduce a character by the image signal by reproducing a recording medium on which an audio signal and an image signal are recorded. In a lyrics display device for displaying in accordance with the audio signal, character recognition means for recognizing the lyrics to be displayed by the image signal character by character and converting the code into a code, and displaying character data corresponding to the code. It is provided with a first storage means for storing and a reading means for reading out the display character data corresponding to the code converted by the character recognition means from the first storage means and displaying it in the display area. I am trying.
According to a second aspect of the present invention, in the first aspect of the invention, the first storage means stores the display character data in an outline font, and the reading means stores the read display characters. It is characterized by expanding and displaying the data. According to the invention of claim 3, in the invention of claim 1, color switching information for detecting that color switching information for instructing color switching of a character to be displayed by the image signal is transferred. A detection unit; and a color switching unit that changes the color of the character displayed in the display area in accordance with the detected color switching information and that corresponds to the character instructed to switch the color. Is characterized by. In the invention according to claim 4, in the invention according to claim 1, from the second storage means for storing lyrics in advance and the character string recognized by the character recognition means,
It is characterized by further comprising character string specifying means for specifying a character string of lyrics stored in the second storage means and supplying the code to the reading means as a code by the character recognition means.

(Operation) According to the first aspect of the present invention,
By reproducing the recording medium on which the audio signal and the image signal are recorded, the characters are displayed in accordance with the audio signal. However, the characters displayed at this time are not based on the image signal but displayed by the image signal. This is based on the display character data which is read from the first storage means in correspondence with the resulting code by recognizing the character to be displayed. Therefore, it becomes possible to replace and display the character by the image signal with the character of higher quality. Here, the display character data stored in the first storage means is preferably an outline font that stores the outer shape of the character as vector data. In this case, the reading means expands the vector data of the display character data corresponding to the code and displays the character in the display area. Next, according to the invention of claim 3, the color switching information detecting means detects that the color switching information has been transferred, and the color switching means detects, among the characters displayed in the display area,
The characters displayed corresponding to the character whose color switching is designated by the detected color switching information are changed in color. Further, according to the invention described in claim 4, even when the character recognizing means erroneously recognizes a character or cannot recognize the character, a character string correctly recognized before and after the character (for example, line unit, phrase unit) The character string of the lyrics stored in the second storage means in advance is specified, and the character that is erroneously recognized or the character that cannot be recognized can be supplemented.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a lyrics display device that is an embodiment of the present invention. In this figure, 20 is a data separation unit, which is a digital signal reproduced by the player 21 (see FIG. 2).
A subcode data signal located immediately after the sync signal,
It is separated into audio data signals located thereafter. Here, the separated sub-code data signal is supplied to the sub-code demodulation unit 22, while the audio data signal is converted into an analog signal by a D / A converter, which is not shown in the figure, and then by the sound system. It is supposed to be pronounced.

The sub-code demodulation unit 22 sequentially takes in one-symbol data in synchronization with the sub-code syncs S ₀ and S ₁ , and if 96 symbols (one packet) have been taken in, it is decomposed into a pack. Output. In the CD, the symbol data in each pack is recorded by being interleaved in order to prevent burst errors. Therefore, it is necessary to deinterleave this at the time of reproduction, and error detection is performed at the time of decoding. , It is also necessary to check each parity bit. It is assumed that these necessary processes are also performed by the subcode demodulation unit 22, but deinterleaving and error correction of these are not directly related to the present invention, and therefore description thereof will be omitted.

The font group detection unit 23 logically interprets the supplied packs to detect "light font" packs for displaying lyrics first, and as a preparation for recognizing the characters displayed by these packs. , Expand those font areas to the storage area. Specifically, the font group detection unit 23 logically interprets the mode, item, and instruction of the symbol numbers 0 and 1 for each pack, and the pack is “light font”.
It is a pack before the color change (COLOR1 is C
_{If 1} ), then in each pack, the font areas consisting of channels R to W of symbol numbers 8 to 19 are detected, and the patterns shown in those fonts are stored in an array according to ROW and COLUMN. Expand to the area.

Next, the character recognition unit 24 recognizes which of the characters stored in the dictionary 25 the developed character pattern is, and outputs the character code. In the above example, since one character of the lyrics displayed on the screen uses eight fonts and is represented by the white pixels specified by the color code C ₁ of those "light font packs", The white pixel is used as a character portion to recognize the character.

On the other hand, the lyrics storage unit 26 stores the lyrics of the reproduced music in advance in units of phrases or phrases.
The lyrics matching unit 27 accumulates all the character codes based on the “light font” pack in which ROW has the same or adjacent values, and stores the lyrics stored in the lyrics storage unit 26.
It is obtained by searching with the stored character codes. Here, if the ROW values of the "light font" pack are the same or adjacent values, the characters of the "light font" pack are displayed on the screen in the same line. That is, since one character is displayed in a two-line font, if the ROW value of the "light font" pack corresponding to the characters ,,, (see FIG. 6) is "a", the character is The ROW value of the "light font" pack corresponding to the ,,, and
Since it is “a + 1”, the characters in the ROW “light font” pack of these values are displayed on the same line on the screen. Therefore, if all the characters based on the "light font" pack having the same or adjacent ROW values are recognized, the character code for one line is acquired. In addition, generally, when lyrics are displayed on the screen, as a result of considering legibility, line breaks of lyrics are performed in units of phrases or phrases, so a character string for one line is necessarily in units of phrases or phrases. Therefore, the character code for one line indicates a phrase or a phrase of lyrics. The character recognition unit 24 does not always have a character recognition rate of 100%, which may result in erroneous recognition or failure to recognize. Therefore, the lyrics matching unit 27 retrieves and acquires the character code indicating the phrase or phrase of the lyrics stored in the lyrics storage unit 26 from the once recognized character code for one line. By doing so, the lyrics matching unit 27 acquires the correct character code indicating the phrase or phrase of the lyrics from the character code that has been recognized.

On the other hand, the color change information detecting section 28 logically interprets the supplied pack and detects the data for instructing the color change of the characters displayed on the screen. Specifically, it is described above. As described above, if the color of the screen is changed by overwriting the already displayed character with the character whose color has been changed, as shown in FIG. 8, COLOR 1 of the symbol number 4 changes to a reddish color. The specified "light font" packs 12 to 15 are detected. When the COLOR1 detects two "light font" packs indicating a red color, the color change information detection unit 28 outputs the color change sequence data.

The lyrics generator 29 reads out the character corresponding to the character code from the outline font dictionary 30,
If it is developed and written in the V-RAM (video RAM) 31, and color change sequence data is supplied,
The data is overwritten on the V-RAM 31 so that one character of the character string is red-painted in order from the left. Here, the screen configuration in the present embodiment is much finer than that of the screen shown in FIG. 5, and for example, the vertical × horizontal dimension is 768 × 1152 pixels. That is, in this case, the screen configuration according to the present embodiment is four times as wide as the screen vertically and horizontally. The V-RAM 31 corresponds to this screen configuration, and the CRT 32 displays according to the data written in the V-RAM 31. Further, in the present embodiment, although not shown in the drawing, a configuration for processing packs other than the “light font” pack is also provided.

Next, the operation of this embodiment will be described. In this embodiment, the data recorded on the CD-G is not touched, so that the pack supplied for displaying the lyrics on the screen and changing the color thereof is the same as the conventional pack. 7 and FIG. 8. First, in FIG. 7, each pack ₁₁ to 11 of the load CLUT, the preset memory, and the preset border.
Screen initialization 1 is performed in the same manner as in the conventional case by sequentially transferring 1 ₃ .

[0032] Next, "write font" pack 2 ₁ to 2
_{8X, 3 1 ~, 4 1} ~, 5 are sequentially transferred. These packs are "light font" packs,
Since 1 is a pack before color change, which is C ₁ , the font group detection unit 23 detects these font areas, and those fonts are ROW and COLUM.
It is expanded in the storage area in an array according to N. As a result, the lyrics that should be displayed on the screen are expanded in the storage area. Then, all the developed lyrics are recognized by the character recognition unit 24, and the character code is output.

The lyrics matching unit 27, first, for one line of character codes based on "write font" Pack 2 ₁ to 2 _8X, i.e., the character code corresponding to the first line of the lyrics, the lyrics storage unit The character code of the lyrics stored in 26 is matched, and the character code indicating the correct character string is output. And the lyrics generator 29
Reads the vector data of the characters corresponding to those character codes from the outline font dictionary 30, expands them, and writes them in the same line in the V-RAM 31.

Next, the lyric matching unit 27 similarly lyricizes one line of the character code based on the "light font" pack 3 _1- , that is, the character code corresponding to the lyric of the second line. In addition, the lyrics generation unit 29 similarly reads out vector data of characters corresponding to the character codes from the outline font dictionary 30 and expands them.
In the V-RAM 31, writing is performed so as to be a new line and the same line as the first line. Hereinafter, similar operations are "write font" Pack 4 _1, performed for 5.

[0035] Thus, on the screen of the CRT32 is "write font" Pack _{2 1 ~2 8X, 3 1 ~} , 4 1 ~, lyrics to be displayed at 5 by 24 × 24 pixels, characters based on outline font Will be replaced with and displayed.

After this, until the period A elapses (see FIG. 8), since the pack of mode "0" is transferred, the CRT is transferred.
The lyrics displayed at 32 do not change. However, when the song progresses to the first character on the first line of the lyrics, the "light font" packs 12 ₁ and 12 ₂ are transferred. When the "light font" pack is transferred, the color change information detection unit 28
Outputs the color change sequence data. Because these packs are “light font” packs,
This is because COLOR1 is C ₂ and the pack is an instruction to change colors, and two such packs have been transferred.

Next, when the color change sequence data is output, the lyrics generating section 29 determines the character portion corresponding to the color change sequence data among the characters already displayed on the CRT 32 in order from the left. Writing is performed on the V-RAM 31 so as to turn red at the speed of. here,
The pack that is the source of the color change sequence data is
These are "light font" packs 12 ₁ and 12 ₂ , and this pack contains the left 1/4 part of the first character on the first line,
Since the instruction is to change the color (see FIG. 6), the lyrics generating unit 29 develops the outline of the V- written.
Left of the first character on the first line in the RAM 31 area 1 /
Data for making only the character portion red is written in order from the left column in the area corresponding to the four portions. As a result, the first character on the first line displayed on the CRT 32 is smoothly changed to red in color from the left to 1/4 at the time when the period A has elapsed since the lyrics were displayed.

After this, when a further period B has elapsed, this time, the "light font" packs 12 ₃ and 12 ₄ are transferred, and similarly the color change sequence data is output, and the CRT is displayed.
The characters displayed in 32 are changed in color. However,
The "light font" packs 12 ₃ and 12 ₄ are for instructing the color change of the left center ¼ portion of the first character on the first line, so the lyrics generating unit 29 causes the V-RAM 3
In the area corresponding to the first character portion on the first line of the area 1, the data for making only the character portion red is written in order from the left column. As a result, at the time when the period B has elapsed, the first character on the first line displayed on the CRT 32 is smoothly colored in red from left to 2/4 in combination with the part that has already been color-changed in red. Change.

After that, when the period C has passed, the first character on the first line displayed on the CRT 32 changes color from the left to 3/4, and when the period D has passed, the first character is displayed on the CRT 32. All the parts of the first character on the first line are changed in color. Then, for the second character on the first line, the "light font" pack 1 is sequentially transferred after the period E has elapsed.
The 2 _{9-12 16} dichroic instead. Similarly, by transferring up to the "light font" pack _128X , the color up to the Xth character on the first line is changed. further,
By sequentially transferring the "light font" packs 13 ₁ to, each character on the second line is color-changed in order from the first character, and so on.
By transferring up to 5, all the lyrics up to the y-th line are changed in color.

As a result, each character of the lyrics displayed on the CRT 32 is smoothly changed in color from left to right as the music progresses.

As described above, according to this embodiment, the CD-G
Characters to be displayed by the signal of are recognized, and the character corresponding to the character code is expanded and displayed in an outline font. Therefore, the character displayed on the CRT 32 is
It is possible to make it extremely high quality. Also, even if the color of the lyrics is changed, it is not based on the font,
Color change sequence data is newly created based on the detected color change information, and color change is performed according to this data, so smooth color change is possible rather than stepwise. Furthermore, the character data displayed by the CD-G signal is
As described above, the so-called dot matrix data in the “light font” pack is output, but according to the present embodiment, it is output as a character code indicating the lyrics themselves.
Therefore, if the character information stored in the outline font dictionary 30 is stored as a set of polygon vertex coordinates, lyrics can be displayed by polygon characters, and a polygon engine and drawing figure (polygon) data are prepared. , By displaying a three-dimensional polygon figure on the CRT 32, mapping the lyrics corresponding to the character code on the surface thereof, and further rotating the lyrics, it is possible to display lyrics that has never existed before.

In the above-described embodiment, if the character recognition rate of the character recognition section 24 is high, the lyrics storage section 26 and the lyrics matching section 27 become unnecessary. These components are optional components in this sense. Further, lyrics of a large number of songs are stored in the lyrics storage unit 26 in advance, and when a song name to be played back is designated, the lyrics corresponding to the song are read out to shorten the time required for matching the lyrics. Or the matching algorithm can be simplified. On the other hand, in the above-described embodiment, in order to change the color, a method of overwriting a character whose color has been changed is used, but there are various methods of changing the color in the CD-G. For example, there is a method of changing a color palette by transferring a "load CLUT" pack. Even in this case, the same color change can be performed by detecting the transfer of the pack for performing the color change operation and creating the color change sequence data. In addition, in the embodiment, it is assumed that the lyrics are displayed horizontally, but in the present application, the vertical display can be similarly applied by only changing the handling of the pack.

[0043]

The present invention described above has the following effects. When reproducing the recording medium on which the audio signal and the image signal are recorded, it is possible to improve the quality of the characters displayed (claims 1 and 2). It is possible to change the color of the displayed characters in accordance with the audio signal (claim 3). Even if the character is erroneously recognized or cannot be recognized, the display character can be specified (claim 4).

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a lyrics display device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a CD signal format applied to the present invention.

FIG. 3 is a diagram showing a configuration of one block in a subcode.

FIG. 4A is a diagram showing a basic configuration of one pack, and FIG. 4B is a diagram showing a configuration of a “light font” pack.

FIG. 5 is a diagram showing an example of a CRT screen format.

FIG. 6 is a diagram showing a relationship between fonts and characters displayed on a screen.

FIG. 7 is a diagram for explaining a transfer state of a “light font” pack for performing a lyrics display operation.

FIG. 8 is a diagram for explaining a transfer state of a “light font” pack for performing a color changing operation of lyrics.

9 (a) to 9 (e) are diagrams for explaining the color changing operation of lyrics.

[Explanation of symbols]

24 ... Character recognition unit, 25 ... Dictionary (character recognition unit by the above), 26 ... Lyrics storage unit (second storage unit), 2
7 …… Lyrics matching unit (character string specifying means), 28 ……
Color switching information detecting section (color switching information detecting section), 29 ... Lyrics generating section (reading means, color changing means) 30 ... Outline font dictionary (first storage means)

Claims (4)

[Claims] 1. A lyrics display apparatus for displaying a character according to an image signal by reproducing the recording medium on which the audio signal and the image signal are recorded, in accordance with the audio signal. Character recognition means for recognizing lyrics in character units and converting it into a code, first storage means for storing display character data in correspondence with the code, and display means corresponding to the code converted by the character recognition means. A lyrics display device comprising: a reading unit that reads character data from the first storage unit and displays the character data in a display area. 2. The first storage means stores the display character data in an outline font, and the reading means.
2. The lyrics display device according to claim 1, wherein the read display character data is expanded and displayed. 3. A color switching information detecting unit for detecting that color switching information for instructing color switching of a character to be displayed by the image signal has been transferred, and detecting the character displayed in the display area. 2. The lyrics display device according to claim 1, further comprising: a color switching unit that switches the color of the character displayed corresponding to the character instructed to switch the color according to the color switching information. 4. The second storage means for storing the lyrics in advance, and the character string of the lyrics stored in the second storage means specified from the character string recognized by the character recognition means, and the code thereof. 2. The lyrics display apparatus according to claim 1, further comprising: a character string specifying unit that supplies the reading unit as a code by the character recognizing unit.