JPH02251984A - Character information display and display system of cassette player - Google Patents

Abstract

PURPOSE: To output a sound signal from speakers and to display character information on a liquid crystal screen by reproducing a sound signal by a right head, outputting the reproduced sound from right and left speakers, reproducing a character information signal corresponding to the sound signal by a left head, and displaying the reproduced character information on a liquid crystal display part. CONSTITUTION: A sound signal is recorded on the right track of a cassette tape, a character information signal, an instruction control signal, etc., corresponding to the sound signal are recorded on the left track, the sound signal is reproduced on the right head RH, and the reproduced sound is amplified and outputted from right and left speakers RS, LS. After reproducing the character information signal and the instruction control signal by the left head LH, these reproduced signals are converted into digital signals, the converted digital character information signal, instruction control signal, etc., are processed by a central processing unit(CPU) 8, and then the character information signal is instantaneously and successively displayed on a liquid crystal screen 12 in accordance with the instruction control signal. Consequently the sound signal is outputted from the speakers and the character information signal such as characters and numerals corresponding to the sound signal can be displayed on the screen 12.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a cassette player (Cassette Pl.
ayer)'s character information display system, and in detail, it outputs audio signals through speakers and displays corresponding character information such as letters and numbers on a liquid crystal screen (LC).
The present invention relates to a character information display system for a cassette player capable of displaying information on a cassette player and its display method.

[Prior Art and Problems to be Solved by the Invention] Conventional cassette players have been used as audio-only equipment for recording audio signals on tape and reproducing audio signals recorded on tape.

Therefore, there is no particular problem when listening to music using a cassette player, but when trying to study a foreign language, etc., it is necessary to look at study aids while listening to the playback signal of the cassette player. This has the disadvantage that the user is confused and loses interest in learning a foreign language. In order to solve these conventional drawbacks, audio signals and text information signals are recorded separately on each channel of a secondary channel stereo tape, and the audio signals recorded on the tape are played back at the first channel head. There has been known an apparatus in which the character information signal recorded on the tape is reproduced by a second channel head, processed, and then displayed on a computer monitor (CRT).

However, such conventional devices require a separate computer to display text information! Since the method requires the use of 4 units, it has the disadvantage that it cannot be applied to a portable cassette player, and there is an inconvenience in that when studying a foreign language, the choice of a place to study is restricted. In addition, recently, video tape recorders that record and play video signals have been used as learning equipment.
Since it is expensive and has a fairly large volume, it is inconvenient in terms of cost and location, and has the disadvantage that it cannot be used as a portable learning device at all.

Therefore, the present invention has been researched to solve the above problems, and has the following objects and means.

SUMMARY OF THE INVENTION An object of the present invention is to provide a portable cassette player capable of outputting an audio signal through a speaker and displaying character information signals such as letters or numbers corresponding to the audio signal on a liquid crystal screen.

Another object of the present invention is to perform only the original cassette player function according to the user's selection, or to output the audio signal through the speaker and display the text information signal on the liquid crystal screen. .

Furthermore, another object of the present invention is to enable text information signals to be displayed instantaneously, sequentially (Scroll), and repeatedly in accordance with command control signals.

[Means and actions for solving problems]

An object of the present invention is to record an audio signal on the right track of a cassette tape, record text information signals and command control signals, etc. corresponding to the audio signal on the left track, and record the audio signal on the right head. The left head reproduces the text information signal and command control signal, then amplifies and converts them into digital signals, and the digitally converted text information signal and command control signal. etc., in a central processing unit, and then display the character information signals instantaneously and sequentially on a liquid crystal screen according to command control signals.

That is, the right head can play an audio signal and output it from the left and right speakers, and the left head can play back the text information signal corresponding to the audio signal and display it on the LCD screen attached to the cassette player. Therefore, it can be applied directly to small portable cassette players. Therefore, it can be easily used as a learning device anywhere, regardless of the learning location.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a character information display system for a cassette player and its display method according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the character information display system for a cassette player according to the present invention. 3. Pass through 4 and turn left.
In a cassette player connected to right speakers LS and RS, mutually interlocking switches S+ and Sz are connected to the left and right heads LH and RH, respectively, and the switch S
The other side fixed terminal A2 of the switch St and the one side fixed terminal A2 of the switch St are commonly connected to the input terminal of the preamplifier 1,
One side fixed terminal al of the switch S+ is connected to the preamplifier 5.
, an analog/digital converter 6 and an input/output section 7 to a central processing unit 8 . Next, the central processing unit 8 is equipped with a program ROM 9 and a data storage ram 10.
By connecting the central processing unit 8 and the output terminal of the central processing unit 8 to the liquid crystal display section 12 through the liquid crystal controller 11, a character information display system of the Kase-Nodblayer according to the present invention is constructed. In the figure, unexplained symbol S
3 indicates a switch for the intera knob, and the switches S + and S z are switches that are interlocked with each other, and when the character information display function is selected, the fixed terminal ai on one side is
, az, respectively, and when the audio-only function is selected, they are short-circuited to the other side fixed terminals S1 and B2, respectively.

FIG. 2 is a block diagram showing a case where the configuration of the character information display system of the cassette player shown in FIG. , left/right head LH, RH
Connect directly to the preamplifier 1.2 and connect the other left head LH'
is directly connected to the pre-amplifier 5, and the rest of the structure is the same as that shown in FIG. FIG. 3 is a flowchart showing a character information recording method according to the present invention. As shown in the drawing, after initializing the system, a start signal indicating the start of a sentence is recorded, and thereafter a control command word (C
1 of the character information after recording the ontrol word)
Byte is recorded, and if it is not the end of the sentence, the next byte of the sentence information is repeatedly recorded until the end of the sentence is reached, and if it is the end of the sentence, an end signal indicating the end of the sentence is recorded, and from then on. If there are other sentences, the process after recording the start signal is repeated to record the sentence information.

Furthermore, FIG. 4 is a flowchart showing the text information reproduction method in the central processing unit 8 shown in FIGS. 1 and 2. As shown in the drawing, after initializing the system, the LCD controller 11 is turned on and a title such as "DTSPLAY CASSETTE" is displayed on the liquid crystal display section 12. From then on, when a start signal indicating the start of a sentence is detected, the text information is stored in one byte until an end signal indicating the end of the sentence is detected. The signals are read one by one and stored in the first area of the ram 10, and thereafter, when a road signal is detected, the first area of the ram 10 is read.
The character information data stored in the area is stored in the second area of the RAM 10, and after the control command is analyzed and the language selection process and the display function selection process are performed, the characters stored in the second area of the RAM 10 are Information data is displayed on the liquid crystal display section 12 according to each function selection.

FIG. 5(A) is an explanatory diagram showing the recording format on the cassette tape used in the cassette player shown in FIG. 1. As shown in the drawing, the cassette tape is tracked by the right head RH. Audio signals are recorded in mono on the right track RT of T1, and the left l/rack LT of the cassette tape T tracked with the left head LH has a start signal indicating the start of each sentence for each sentence - language selection function and display selection. It is constructed by sequentially recording a control command signal representing a function, a character information signal, and an end signal representing the end of a sentence. FIG. 5(B) is an explanatory diagram showing the recording format on the cassette tape used in the cassette player shown in FIG. 2. As shown in the drawing, the left and right heads L
Left/right track LT, RT tracking with H, RH
The audio signal is recorded in stereo, and the other right head RH'
The right track RT', which is tracked by the left head LH', has no signal, and the other left track LT', which is tracked by the left head LH', has a start signal that indicates the start of each sentence for each sentence - language selection function and display selection function. It is constructed by sequentially recording a control command word signal, a character information signal, and an end signal indicating the end of a sentence. On the other hand, the control command signal is composed of 8 bits, and the upper 4 bits are used as language selection function bits, and the lower 4 bits are used as display selection bits. and display selection functions are shown in Table 1 below.

FIG. 6 is an explanatory diagram showing the relationship between the recording order of the audio signal and the text information signal recorded as shown in FIG. 5, and FIG. indicates the order,
FIG. 6(B) shows the recording order of audio signals. As shown in the drawing, before recording the audio signals of sentences A and B, first record the character information signals corresponding to sentences A and B, and then the character information of each sentence A and B is recorded. The signals are first played back, and then the audio signals of text A and document B are played back. Therefore, the audio signals of sentences A and B are output from the speakers, and the sentences A and B are output from the speakers.
Character information signals can be displayed on the liquid crystal display section. In addition, at the beginning of recording the audio signal of sentence C,
When the character information signal corresponding to sentence C is recorded, the audio signal of sentence C is played back while the character information signal of sentence C is being played back. Therefore, after a certain period of time after the audio signal of sentence C is output from the speaker, that sentence C The character information signal is displayed on the liquid crystal display section. On the other hand, the recording time of the text information signal based on the audio signal is not limited as described above, and since the recording time of the text information signal is extremely shorter than the recording time of the audio signal, it is difficult to record the learning to be recorded. The editor can arbitrarily decide on the content.

The operation of the character information display system for a cassette player according to the present invention having the above structure and its display method will be explained as follows. In the circuit shown in Figure 1,
To select audio-only functions, switch S, , S,
When the audio tape is played by short-circuiting it to the fixed terminals bI and b2 on the other side, the audio signals played by the left and right heads LH and RH pass through the switches S+ and St, respectively, and then go to the preamplifier 1.2. The signal is then amplified by the power amplifier 3.4 and output as stereo by the left and right speakers LS and R3. On the other hand, in order to select the character information display function, connect the switches S, , and St to the fixed terminal alsa2 on one side.
When the cassette tape T recorded as shown in FIG. 5(A) is played back by short-circuiting the The reproduced audio signal is amplified by the pre-amplifier 2 and power amplifier 4, and is then amplified by the right speaker R3.
The reproduced audio signal passes through the switch S2, is amplified by the pre-amplifier 1 and the power amplifier 3, and is output from the left speaker LS. That is, in this case, a mono audio signal reproduced by the right head RH is output to the left and right speakers LSSR3.

In this case, the left track L of the cassette tape T
The start signal, control command word signal, character information signal, end signal, etc. recorded in the T are reproduced by the left head LH, and the reproduced signals are amplified by the preamplifier 5 after passing through the switch S1, and are analog The digital signal is converted into a digital signal by a digital converter 6, and the converted digital signal is applied to a central processing unit 8 through an input/output section 7. Therefore, the central processing unit 8 processes the digital signal according to the program contents of the ROM 9 as shown in the flowchart shown in FIG. 4, and displays it on the liquid crystal display section 12. That is, when the reproduction selection signal is input through the input/output unit 7, the central processing unit 8 initializes the system, turns on the liquid crystal controller 11, and displays @DISPLAY on the liquid crystal display unit 12.
CASSETTE" will be displayed. From now on,
As mentioned above, when a start signal representing the start of a sentence is detected from the signal that is converted into a digital signal by the analog/digital converter 6 and applied through the input/output section 7,
The output signal of the input/output unit 7 is read one byte at a time until the end signal indicating the end of a sentence is detected and stored in the first area of the RAM 10. Thereafter, when the end signal is detected, the output signal of the RAM 10 is read. The character information data sequentially stored in the first area of the RAM 10 is read and stored in the second area of the RAM 10. After that, the control command word is analyzed and language selection processing and display function selection processing are performed. The character information data stored in the second area of the LCD controller 1 is displayed according to each function selection.
1 is controlled and displayed on the liquid crystal display section 12.

For example, as shown in Table 1 above, the top four control command words
If the bit is an English selection value and the lower 4 bits are an instantaneous display selection value, the character information data stored in the second area of the RAM 10 is processed according to the English selection, and then the liquid crystal controller 11 is activated according to the instantaneous display. control, and the English text based on the character information data is instantaneously displayed on the liquid crystal display section 12. Similarly, the top 4 control command words
If the bit is a Japanese selection value and the lower 4 bits are an instantaneous display-sequential display value, the character information data stored in the second area of the RAM 10 is processed according to the Japanese selection, and then according to the instantaneous display. The liquid crystal controller 11 is controlled to instantaneously display Japanese sentences based on the character information data on the liquid crystal display section 12, and the Japanese sentences are sequentially displayed on the liquid crystal display section 12 again in the above-described manner. become. Thereafter, when a start signal indicating the start of a sentence is detected again, the above process is repeated and information based on the character information data is displayed on the liquid crystal display section 12.

On the other hand, when the interlap switch S is pressed while text is being displayed on the liquid crystal display section 12 as described above, a low potential signal passes through the input/output section 7 and is applied to the central processing unit 8 as an interlap signal. Therefore, the central processing unit 8 reads the character information data stored in the second Til area of the RAM 10 and repeatedly displays it on the liquid crystal display section 12 as described above.
The interlap function will now end.

Also, with the circuit shown in FIG. 2, a cassette tape T! recorded as shown in FIG. 5(B) is used. When playing back the cassette tape T, the stereo audio signals recorded on the left and right tracks LT and RT are played back by the left and right heads LH and RH, respectively, and then the preamplifier 1.2 and the power amplifier 3.4 and output from left and right speakers LS and R3.

In this case, the start signal representing the start of the sentence recorded on the other left track LT', the control command word signal representing the language selection function and display selection function, the character information signal, and the end signal representing the end of the sentence are The signals reproduced by the left head LH' are applied to the pre-amplifier 5, and the signals reproduced by the other left head LH' are processed in the manner described in FIG. 1 above and displayed on the liquid crystal display section 12. be done.

〔Effect of the invention〕

As explained above, the character information system for a cassette player and its display method according to the present invention reproduces an audio signal from the right head and outputs it from the left and right speakers, and outputs the character information signal corresponding to the audio signal from the left head. Since it can be played back by the head and displayed on the liquid crystal display attached to the cassette player, it has the advantage that it can be used as a learning device at any location, regardless of where the learning location is. In addition, since the text based on the character information signal can be displayed instantaneously or sequentially on the liquid crystal display according to the recorded control commands, the learning effect can be further improved. In addition, since the part that processes the reproduced character information signal can be constructed with a single chip, the product can be further miniaturized, making it more convenient to carry, and the cost can be greatly reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the character information display system for a cassette player according to the present invention, and FIG. 2 shows another embodiment of the character information display system for a cassette player according to the present invention. Block diagram; FIG. 3 is a flowchart showing the character information recording method of the cassette player according to the present invention; FIG. 4 is a flowchart showing the character information reproducing method of the cassette player according to the present invention; FIG. is an explanatory diagram showing a recording format on a cassette tape, FIG. 5(A) is an explanatory diagram showing a 2-track recording format, and FIG. 5(B) is an explanatory diagram showing a 4-track recording format. Explanatory Diagram FIG. 6 is an explanatory diagram showing the recording order relationship of audio signals and character signals on a cassette tape. 1.2.5--Preamplifier, 3.4--Power amplifier, 6--Analog/digital converter, 7--Input/output section, 8--Central processing unit, 9--ROM, 10-- Ram, 11-LCD controller 12--LCD display section, LHS LH'-Left head, RH, RH'-Right head, LS-Left speaker R3--Right speaker S+ Sx -Switch.

Claims (6)

[Claims] (1) Tracking the left and right tracks of the tape
Right head (LH), (RH) and the left/right head (LH)
), (RH), and interlocking switches (S_1) and (S_2) that selectively output playback signals of the right head (RH) and playback signals that are output by the respective switches (S_2) and (S_1). Preamplifiers (1), (2) that amplify
and power amplifiers (3) and (4) that amplify the output signals of the preamplifiers (1) and (2) and output the amplified signals to the left and right speakers (LS) and (RS), and output the signals to the switch (S_1). a pre-amplifier (5) that amplifies the reproduced signal to be reproduced; an analog/digital converter (6) that converts the output signal of the pre-amplifier (5) into a digital signal; and an output signal of the analog/digital converter (6). an input/output unit (7) that receives input from and outputs it; and a central processing unit (8) that processes the output signal of the input/output unit (7) according to the program contents of the ROM (9) and outputs it as a character display signal. ), a RAM (10) for temporarily storing data output from the central processing unit (8), and a liquid crystal controller (12) for displaying character display signals output from the central processing unit (8) on a liquid crystal display section (12). 11
) is a character information display system for a cassette player. (2) An audio signal is recorded in mono on the right track of the tape tracked by the right head (RH), and a start signal indicating the start of a sentence is recorded on the left track of the tape tracked by the left head (LH). A character information display system for a cassette player according to claim (1), wherein a control command signal representing a selection function and a display selection function, a character information signal of one sentence, and an end signal representing the end of a sentence are sequentially recorded. . (3) The reproduction signals of the left and right heads (LH) and (RH) are directly applied to the preamplifiers (1) and (2), and the reproduction signals of the other left head (LH') are applied to the preamplifiers (1) and (2). 5)
2. The character information display system for a cassette player according to claim 1, wherein the character information display system is configured to apply the information to the cassette player. (4) Audio signals are recorded in stereo on the left and right tracks of the tape tracked by the left and right heads (LH) and (RH), and the other tracks of the tape tracked by the other left head (LH') On the left track, a start signal representing the start of a sentence, a control command signal representing a language selection function and a display selection function, a character information signal of one sentence, and an end signal representing the end of a sentence are sequentially recorded. Claim (3
) Character information display system for cassette players. (5) After initializing the system with the central processing unit (8), turn on the liquid crystal controller (11) and turn on the liquid crystal display (1).
2), and after that, when the central processing unit (8) detects a start signal indicating the start of a sentence, it reads the character information data one byte at a time until it detects an end signal indicating the end of the sentence. ), and when an end signal is detected thereafter, the character information data stored in the first area of the RAM (10) is stored in the second area of the RAM (10), and one byte of character information data is stored in the second area of the RAM (10). After analyzing the control command signal and performing language selection processing and display function selection processing, the RAM (1)
0) A character information display system for a cassette player in which character information data stored in the second area can be applied to the liquid crystal controller (11) and displayed on the liquid crystal display (12) by selecting each function. (6) The character information display of the cassette player according to claim (5), wherein the 1-byte control command word signal has upper 4 bits representing a language selection value and lower 4 bits representing a display selection value. method.