JPS6278596A - Music reproducer system by optical card - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical aspect of the invention!?) This invention relates to a system for recording music information on an optical card, reading the recorded information from the optical card, and reproducing music.

(Technical f"f jJ of the invention and its problems) In addition to magnetic cards, which have been widely used in cash cards, credit cards, etc., in recent years, optical data recording is being used along with IC cards as carts that can record data at higher density. Carts (hereinafter referred to as optical cards) are attracting attention. Optical cards are about 25,000 times more expensive than magnetic cards, and about 25 times more expensive than IC cards.
It has 0 times the storage capacity (approximately 400 bytes), and there is a strong desire to develop its applications and utilization technology.

Here, the optical card is shown by the reference numeral 10 in FIG. 2, and is small in size, and the card surface consists of a printed portion 11 such as characters and graphics, and an optical data recording area 12.

The optical data recording area can be set to any size, and the size of α can be set to include the back side depending on the need for data recording. The most efficient reading method currently considered is to read data by scanning and detecting this optical recording area with the line sensor 11B.

This optical power -1'IO and the line senna for reading it are in a phase dependent relationship. That is, since the optical cart 10 needs to record as much data as possible, it is necessary to record as small pits as possible as densely as possible, whereas with the light/sensor, in order to reduce reading errors, It is desirable that the bits of the optical card 10 have a size appropriate to the pixel size of the line sensor, and it is desirable to balance the requirements for the card from the standpoint of recording density with the requirements for the cart from the line sensor side. For this purpose, an optical system, ie, a lens, is provided at the light entrance portion of the line processor. However, during reading, the distance between each element of the optical system including the cart and line sensor changes due to vibration of the card due to a malfunction in the car 1' support mechanism, etc., and the recording pit of the card changes. There is a problem in that the position is outside the operating range of the optical system, for example, outside the focusing range.

In addition, in the case of &i-Ki cards, reading can be performed while the reading head is layered on the magnetic recording surface of the card, whereas in the case of optical cards, the light/sensor is inserted into the optical system from the data recording surface of the card. The optical system must always be focused on the recording surface of the card during reading, and when the optical cart is set in the reading device, the optical card inserted into the reading device must be Alternatively, the optical system is transported to a predetermined reading position by a transport system, but in this case, if the transport system used in the conventional magnetic cart reader is used, the card cannot be set at a predetermined focal plane. It is very difficult to do so. In particular, since the material of the card is flexible, the error in the focal plane becomes quite large. Generally, when reading an optical system, the focal plane error is
This becomes an extremely serious problem because accurate reading cannot be performed unless the value is kept within Ls. As a way to solve this problem.

There is a method of using an automatic focusing mechanism in the optical system. Providing a mechanism that automatically adjusts the focus of the optical system after the cart is set will ensure proper focus at all times. However, such an automatic focusing mechanism has a complicated structure.
It has the disadvantage of being expensive.

(Effect of the invention) This invention was made in the Eastern Qing Dynasty as mentioned above.
An object of the present invention is to propose the use of optical cards for music, and to provide an optimal system for the same.

(Summary of Issue 51) This invention relates to a music reproduction system using an optical card, in which music information recorded on an optical card is optically read and code-converted, and the code-converted music data is transferred to a synthesizer area. In other words, it is an electronic musical instrument that uses human power to play music.

(Embodiment of the Invention) Figure tS1 is a block diagram showing an example of the system of this IIJ, and is an optical card on which 7G Raku information is recorded using the method described later. 0 is input to the card reading device 100, and the music data read by the card reading device 100 is input to the computer 2 via the interface l after being subjected to necessary processing. Information processed by the computer 2, such as format conversion, is input to the synthesizer 200 via the interface 3, and the music recorded on the optical card IO is played back and output from the built-in speaker. Further, the information processed by the computer 2 is input to the display control circuit 4, and accompanying information such as the music score corresponding to the music to be played, the lyrics 2, the composer, etc. is displayed on a CRT, liquid crystal, plasma, 1. It is displayed on a display device 5 such as an ED.

In such a configuration, first, the optical card 10 used in the present invention will be explained.

The bottom surface of the optical card 10 is as shown in FIG.
Its cross-sectional structure is shown in Figure 3.

An optical recording material 14 is provided on a card base material 13. This optical recording material 14 includes (a) an optical recording material base material 14a, (b') a recording Wt4a consisting of a light transmitting part +4b and a light shielding part t4c provided on the lower surface of this base material,
(C) This optical recording material is composed of a reflective metal thin film layer 15 provided on one side of the recording layer 14d.
4 is provided on the card base material 13 so that the metal fJ film layer 15 is in contact with it. In some cases, a magnetic recording layer 16 may be provided on the surface of the optical card IO, and
If necessary, IG memory, photo, 2 characters of engraving image,
Marks, embossed characters called imprints, etc. may be added to the surface of the optical card IO.By doing this, one card can be compatible with various music playback methods, and it also makes counterfeiting more effective. can be prevented.

In addition, an optical card 10 in another example has a recording layer 14d and a metal thin film layer 1 formed not on the entire surface but on a part of the surface of the optical recording material base material 14a, as the cross-sectional configuration is shown in FIG.
5 is provided.

Here, as the card base material 13, any material that can be used as a base material for a normal card can be used.

Specifically, polyvinyl chloride, vinyl chloride/vinyl acetate copolymer, polyvinylidene chloride, acrylic polymers such as polymethacrylic ugly methyl, polystyrene, polyvinyl butyral, acetylcellulose, styrene/butadiene copolymer, polyethylene, Polypropylene, polycarbonate, etc. are used.

Depending on the case, a sheet of metal such as iron, stainless steel, aluminum, tin, copper, or zinc, or synthetic paper may also be used. Furthermore, rust layer bodies for each of the above-mentioned materials are also used. Fifth
The figure shows yet another example of the optical card 10, in which an optical recording material 21 and a card protective layer 22 are provided in this order on a card base material 20. This optical recording material 'J421 is.

(a) a base material 23 for optical recording material; (b) a recording layer 2B consisting of a light transmitting part 24 and a light shielding part 25 provided on the lower surface of this base material 23; and (c) a recording layer 2B provided on the lower surface of this recording layer 26. Reflective metal thin Il provided! It is composed of J layer 27,
This optical recording material 21 is provided on the card base material 20 so that the gold apJS layer 27 is in contact with it. In yet another example, a reflective metal film is formed in a pattern on the lower part of an optical recording base material, and a light absorbing layer is provided under the reflective metal film so as to be in contact with the card base material.

Next, an example of the card reading bag fi100 will be explained with reference to FIGS. 6(A) and 6(B). In yet another example, a reflective metal film is formed in a pattern on the lower part of an optical recording base material, and a light absorption layer is provided under the reflective metal film so as to be in contact with the base material.

FIG. 6(A) is a schematic front view, and FIG. 6(B) is a schematic top view. The optical card 10 is inserted from the right side in the figure, and is conveyed to the left by a guide roller 101. During this transportation, the optical card 10 is supported by a travel guide 102 (the central portion is omitted in FIG. 6(A)), and a reading optical system 103 is provided at the central reading position ( (omitted in FIG. 6(B)), this is constituted by, for example, a lens and a line sensor, and this optical system 103
A backing plate 104 and a pressing roller 105 are provided below. Light card! 0 is transported to the reading position,
It is inserted between this backing plate 104 and the suppression roller 105, and will run between them from now on. Suppression roller 105
presses the optical card 10 from below to the top, and
Always keep the side of the plate in close contact with the back side of the backing plate +04. If the backing plate 104 is installed at a position such that the data recording surface of the optical card 10 that is in close contact with the backing plate 104 coincides with the focal plane of the optical system 103, a proper focus will always be ensured when reading data. Note that the patch plate 104 has a transparent window 10111 for reading data, and this transparent window 108
It is provided at a position corresponding to the data recording area I2.

FIG. 7 shows a reading optical system for the optical card IO, and this optical system converts light from a light source lamp 110 into a condenser lens III, a diffuser plate 112 . The light reflected from the half mirror 114 is applied to the recording surface of the optical card 10 via the objective lens +15 via the condenser lens 113 and then to the half mirror 114. The objective lens +15 is focused on the recording surface of the optical card 10, and pits on the recording surface of the optical card 10 are projected onto the line sensor 11B.

In this optical system, an optical cart 10 and a line sensor 11
In order to avoid the need for focus adjustment even if the relative distance to the second objective lens 115 changes, the magnification is set as low as possible in order to increase the depth of focus of the second objective lens 115. This allows optical card IO
It is not necessary to configure the a function of the device to strictly control the relative distance between the line sensor 11G and the line sensor 11G, and the system can be simplified. Furthermore, the objective lens 115 has a large numerical aperture, thereby avoiding the influence of dust, scratches, etc. attached to the transparent protective layer covering the data recording surface of the optical card IO. And objective lens 11
5 is required to have sufficient resolution for the size of recording bits.

Here, if the depth of focus is expressed as Δ, the open numerical aperture NA, the resolution as α, and the reading wavelength as 5 magnification as m, then the depth of focus Δ can be expressed as follows, and the resolution α can be expressed as follows.

Here, when Δ=40μ■, α1IIIL@, and the wavelength of the reading light is set to 0.67μ layer, both the above equations are solved.

NA=0.40 m=l.

In other words, the optical card 10 and the line sensor 116
This means that even if the relative distance between the two layers changes by 40 g, a pit larger than llLa can be read accurately. With this degree of margin, a practical reading device can be constructed at relatively low cost.

FIG. 8 shows the signal processing system of the card reading device, which is conceptually shown in FIG. 9. m8 [1
The data signal read by the line sensor] 16 is passed through the low frequency noise removal circuit 501 in the signal processing R circuit 130, which is provided as necessary, and then sent to the binarization circuit! 3
The data read circuit 133 functions as a buffer circuit and reads data based on a timing signal outputted from a timing generation circuit 134. Since the timing generation circuit 134 also provides a timing signal to the line sensor 116, the reading operation of the data read circuit +33 is performed synchronously with the reading operation of the line sensor 6. The data obtained by the reading operation by the data read circuit 133 is sent to the microcomputer 120, where the data contents are interpreted and necessary operations are performed, and the results are outputted from the printer+21.

Figure 10 shows the microcomputer 1 of Figures 8 and 9.
Of the operation contents in 20, only the data import operation is shown.

First, data is read in step S1, and if the data is recognized as correct by parity check, CRCC check, etc., according to the format recorded on the optical card (step S2), the data is stored in memory (step S3). , if not correct, proceed to step S above.
Return to l.

Next, the data written in the memory is searched for a data break (step S4), but the data break is determined by the optical card 10.
Depends on the data format when recording data. If a delimiter is found, the reading operation is ended or the reading operation is continued depending on whether the data is complete (steps S5 and S6).

In the present invention, for example, MIDI (Musical Instruments) is used for the optical card 10 as described above.
Music information is recorded using the ENT port 1g1tal Interface). When converting a musical score into music data using MIOr, there are the following commands.

(1) Note-off event Decide at what height and loudness the note will be played. This corresponds to how hard or how fast you press which keys on a keyboard instrument such as a piano.

(2) Note-off ψ event Determines the pitch at which the note should be made less rushed. If we compare this to a piano, this corresponds to which key is released, but as in (1) above, there is also a parameter that indicates the speed at which the key is released, so it can be expressed more humanly. is possible. Note that this command does not actually turn off the sound, but only the command, so if the sound has a lingering sound, the sound may continue to be heard even after this command is sent.

(3) Control Change When the switch or volume on the instrument's panel is changed, that information is sent out. This allows you to change the settings of several instruments in an instant, or change the tone from the computer.

In addition, there are tempo signals for the rhythm machine and commands for specifying small cylinders, but their explanation will be omitted.

The baud rate of Ml[11 is 31.25 baud, the data width is 8 bits, and 1 start bit and 7 stop bits are added before and after the baud rate. Also, M.I.D.
As a function of I, each instrument can be divided into up to 16 channels, and multiple instruments connected in series can be individually controlled by sending commands while specifying each channel. For this reason, channel number data is also usually included in the status byte.

Specifically, if a command is given to erase the blindness after the sound of "fa" is sounded for one second, the result will be as shown in Fig. 11. That is, the first 3 bytes make a sound, wait for 1 second, and then send the next 3 bytes to turn off the sound.

The first byte is the status byte, for which bit 7
bits 6 to 4 are “0” indicating that this command is a note-on event.
Bits 3 to 0 can specify the channel number from °゛O'' to '15'', but in this case they are set to ``0''.The second and third bytes are data bytes. Therefore, bit 7 is “L”. The second byte determines the pitch of the sound, but this pitch is not a specific H/, but is a number that is assigned to each key on a piano or other keyboard from the bottom. For example, the central C is 60 Jt, and the “C” one octave above it is 60 Jt.
is designed to specify a scale in semitones, such as 7218. Here, we will use 65 (1
The third byte indicates the speed or strength of pressing the key, and its value is “°l°”.
From ``'' to ``127'' (7FH), the larger the number, the stronger and faster the press.

Here, the a value is "100" (84H), so it means that you played a little harder. After waiting for 1 second, a note-off event of 4 bytes [1 indicates that the key has been released. The 4th byte is almost the same as the 1st byte, with bits 6 to 4 containing 00 indicating that this command is a note/event.
0'' is entered.Of course, the channel specification part of bits 3 to 0 must be the same channel as the note-on event, so in this case it is specified as 0''. The 5th and 6th bytes, like the 2nd and 3rd bytes, respectively, represent the designation of the key and the speed at which it was written.

Music information recorded on the optical card 10 using MIDI as described above can be read using the card reading bag'j! 1100, code conversion is performed, and information according to the code format is stored in memory. In the card reading bag F11100, the information stored in the memory can also be printed by the printer 121, and sent to the computer 2 via the interface l. The computer 2 decompresses the transmitted compressed information or converts it into a format for the synthesizer 200, and sends the processed data to the display control circuit 4 and to the synthesizer 200 via the interface 3. The synthesizer 200 synthesizes the sent music data and plays the music, and outputs the sound from the built-in speaker.The display device 5 displays the lyrics and music score in the case of karaoke music, or displays the lyrics and composer, etc. information is displayed, so people who listen to music can enjoy it visually as well.

In the above example, the music is reproduced by a synthesizer, but the use of electronic music is also a circuit, and the line sensor of the card reading device +00 is composed of a ccn, a photodiode, etc.

(Effects of the Invention) As described above, according to the music playback system of the present invention, music information recorded on an optical card using MIDI etc. can be played back with a synthesizer, an electronic musical instrument, etc. You can enjoy music more easily than with discs, cassette tapes, etc. Moreover, when the lyrics and accompanying information about the composer τ are displayed on the display device in parallel with the music reproduction, the music can be enjoyed more effectively.

[Brief explanation of drawings]

Figure fJS1 is a block diagram showing an example of a music playback system using an optical card of the present invention, Figures 2 to 5 are diagrams showing examples of an optical card used in the present invention, and Figure 6 (
A), (B) and FIG. 7 respectively show an example of the card reading device used in the present invention; FIG. 58 and FIG. 9 show the internal structure of the card reading device; FIG. A flowchart showing an example of the operation, Figure 11 is the old D
It is a figure showing an example of I. 1.3...Interface, 2...Computer,
4...Display control device, 5...Display device, 10...
- Optical card, II...Printed portion, 12...Optical data recording area, 13...Card base material, 14...Optical recording material, 100...Card reading device, 103...Optical system , 110... Light source lamp, 11B... Line sensor, 200... Synthesizer. L 2 Figure 7 Stone 5 Figure 3 Figure 4 (A) CB) Hair 6 Figure ro==2 to J===hi~〆da Shoji (157Uzu

Claims (3)

[Claims] (1) Music information recorded on an optical card is optically read and code-converted, and the code-converted music data is input to a synthesizer or electronic musical instrument to play music. A music playback system using optical cards. (2) A music playback system using an optical card according to claim 1, wherein recording on the optical card is performed by MIDI. (3) A music playback system using an optical card according to claim 1, wherein the optical reading is performed using a CCD line sensor.