JPS59127281A - Cassette device - Google Patents

Abstract

PURPOSE:To search for a sound-recording start position in a short time through easy operation by recognizing the current position on real-time basis, and running a tape and making its absolute position coincident with the sound-recording start position. CONSTITUTION:When a sound-recording position search mode key 109i is pressed, a processor 107a reads the sound-recording start position Lc out of a storage area of an RAM 107c which corresponds to a tape identification number, and while the number is set in a register 110, a comparison enable signal CEBL is sent to a comparator 111. The comparator 111 discriminates the large/small relation between the current absolute positon La and the sound-recording start position Lc and outputs a forward rotation command NRS or reverse rotation command RRS to a motor control circuit 112 according to the comparison result to rotate a motor on a supply or take-up side at a high speed. When the La and Lc coincide with each other, the searching for the sound-recording start position is completed by the rotation stop command STS generated by the comparing circuit 111. Further, the precision of the searching is improved by performing servocontrol which reduces the rotating speed when the difference Lc-La decreases below a specific value.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette device, and more particularly to a cassette tape recorder that can improve the operability of a cassette cheap recorder.

The cassette tape recorder has a counter for displaying the tape running position of the cassette tape. This counter indicates the amount of rotation of the winding hub using the principle of the diene mechanism or using a pulse coder, and indicates the tape running position by the amount of rotation of the winding hub. However, in such a running position display system, the count value of the counter is not proportional to the tape length, so such a counter cannot accurately display the remaining amount of tape. Recently, we have developed a Shigeko linear counter that detects the rotational speed of the left and right hubs (reels), calculates the tape running length or running time using a computer, displays stiffness, and displays the remaining tape dust time as appropriate. Counters called real-time counters have been developed and are being installed on cassette decks.

This multiple linear counter or linear counter determines the tape running length or tape running time (at playback or recording speed) from the reference position (rewind position), that is, the absolute tape position (referred to as absolute position or absolute position). can be detected, and the displayed value of the counter can be made proportional to the tape position.

Now, with conventional cassette tape recorders, when you want to add to a tape that has been partially recorded, you have to go through the troublesome operation of fast-forwarding, playing, and rewinding one after another to find the unrecorded portion. The first step was to detect the head of the person and then record it. However, this method was cumbersome to operate, required a long time to search for a position to start recording, and was not able to respond quickly even if a sudden air check opportunity came up. Therefore,
Recently, a recording start position search method called "blank search" has been developed, which eliminates the above-mentioned conventional troublesome operations and makes it possible to search for a recording start position in a short time.

This "blank search" is performed by computer processing, and when you press the blank search button, the tape is fed, and the detection of unrecorded parts begins.
When an unrecorded part of 8 seconds or more is detected during fast forwarding, the system automatically returns to the beginning of the unrecorded part, then stops after a 4 second interval, and enters recording standby. It has the advantages of not missing a check opportunity, making good use of the tape without wasting it, being easy to operate, and shortening the search time. However, this "blank search" method cannot be used when recording another song on an already recorded tape without erasing everything, and later recording an old song from the place where the recording ended. figure,
Moreover, since the step of going too far past the recording start value and returning back is taken, there is a drawback that about 20 seconds of search time is wasted.

Also, when Kiriko wants to select a song on a conventional cassette tape recorder, (a) she inputs the number of songs before the currently selected song (suppose it is the nth song), runs the tape, and then selects the song between songs. A method of counting the unrecorded portions of , and determining that song selection is complete when the counted value matches the input n, and (b) rewinding the cassette tape, then inputting the track number from the beginning and running the tape. , the unrecorded portions between songs are detected and counted while the tape is running, and when the counted value matches the song selection number, the song selection is complete. However, in method (a), it is necessary to be able to recognize which song is currently being selected, and it is also necessary to count the number of songs between the desired song and the song currently being selected. However, the operation was troublesome. On the other hand, method (b) requires the cassette tape to be rewound when selecting a song, which has the disadvantage that it takes a long time to select a song.

Further, in conventional cassette tape recorders, it is not possible to display the remaining playing time of the currently playing song, and furthermore, it is not possible to display the remaining recording time of the cassette tape at any given time.

In light of the above, an object of the present invention is to provide a cassette tape recorder that uses an electronic linear counter (absolute position detection means) and can search for a recording start position with simple operation and in a short time. It is. Another object of the present invention is to provide a cassette tape recorder using an electronic linear counter (absolute position detecting means) that is easy to operate and can select songs in a short time without necessarily rewinding the tape. Still another object of the present invention is to provide a cassette tape recorder using an electronic linear counter (absolute position detection means) capable of displaying the remaining playing time of the song being played. Another object of the present invention is to provide a cassette tape recorder that can display the remaining recording time of a predetermined cassette tape at any time, for example, when the cassette tape is set or even when the cassette tape is not set.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of stored contents.

In FIG. 1, 101a and 101b are respectively attached to the left and right reels, and 102b and 102b are respectively attached to the reel shaft, and each time the reel shaft rotates a predetermined amount, the
° Two-phase pulses Pa, Pb with different phases; Pa', Pb'
A pulse generator 103 is a calculation unit that calculates the tape position (absolute position) from the reference position or the tape running time in real time. This calculation unit calculates the absolute position or tape running time (hereinafter, the term absolute position or absolute position shall include the tape running time) from the rotational speeds fa and fb of the left and right reels. Details are omitted. The rotational speed of the front, left and right reels is determined by the pulse generator 102a within a predetermined sunblink time.

The number of pulses Pa generated from 102b, as well as the pulse P
It is proportional to the number of a'. 104 is a current position register in which the absolute position is set; 105 is a display unit that displays the contents of the register (absolute position); 106 is a display drive circuit; and 107 is a microcomputer that stores the processed oil 107a and a control program. It has a control program memory 107b, a RAM (random access memory) 107c, and a recording time/deep length correspondence memory 107d. For example, as shown in FIG. 2, the RAM 107c stores a recording time code indicating the maximum recordable time, A-side and The recording start position RA, RB on side B, the correspondence between the song number and absolute position of the song for the number of rice grains recorded on side A, and the relationship between the song number and absolute position of the song for the number of rice grains recorded on side B. The correspondence relationships are memorized. That is, around the time of its release, each cassette tape was given a tape name, such as a tape identification number, and the absolute position at the end of self-region recording corresponding to the tape identification number (in other words, the next recording start position on sides A and B) was assigned to each cassette tape. )RA,
He is playing RB etc. The relationship between the side, track number, and tape affiliate position is 0 to 5 on side A as shown in Figure 3 of the ship.
00 for the first song, 500-995 for the second song, 995
~1500 is the 5th song, 1500~2000 is the 4th song, B side 0~200 is the first song, 200~10
The second song is on 00, the fifth song is on 1000-1500,
The fourth song is from 1500 to 1800, and the fourth song is from 1800 to 2000.
Assuming that the fifth song has been recorded in the following, it is stored in the RAM 107c as shown below. In other words, the correspondence between the track number on side A and the absolute position is 1,0000:2,0500;3,0995;4,15
00, and the correspondence between the song number on the B side and the absolute position is 1, 0000; 2, 0200; 3, 1000; 4, 15
It is stored as 00;5,1800.

108 is a non-volatile memory that copies the contents of the RAM 107c and retains the stored contents even if the system is disconnected;
Bubble memory or rewritable EEROM (Elec
tric Erasable ROM).

It should be noted that if the RAM 107c is constituted by a battery-backed RAM, the non-volatile memory 108 is omitted. Reference numeral 109 is an operation panel that includes a stop button 109a, a record button 109b, a play button 109c, a fast forward button 109d, a rewind 17 button 109e, a pause button 109f, and the identification number of the cassette tape loaded on the deck. The numeric keypad 109g is used to enter the A side/B side of the set side and the track number, and after the tape identification number and set side are input, it is pressed to input the Kowara sieve number and set side strange news into the microcomputer 107. The entry key 109h, the recording start position search key 109i, which is operated when positioning the tape to the previous recording start position (the current recording start position), and the recording start position search key 109i, which is operated after manually inputting the song number from the numeric keypad 109g when selecting a song. a music selection start button 109j, a display section 109k for switching and displaying information entered from the numeric keypad 109g, remaining recording time, remaining performance time, and a group of keys 109m for inputting the maximum recording time of the tape loaded on the deck; Lamp group 10 that displays the maximum recording time of the installed tape
9n, a lamp or buzzer (referred to as a lamp) 109p for prompting input between recording sections, and a display changeover switch 109q for switching the display of tape identification number (including set side)/remaining recording time/remaining performance time. are doing. 110 is a register in which the recording start position and the beginning position of the desired song are set;
11 is a comparator for comparing the current absolute position La and the target absolute position Lc, and 112 is a motor control circuit.

Next, the present invention will be explained in detail. In addition, it is assumed that identification numbers 01 to 99 are attached to the fidgets of a plurality of cassette tapes in advance, and the RAM 107c and non-volatile memory 10
It is assumed that the contents of the storage area corresponding to tape identification number #15# of 8 are all zeros.

After pasting the cassette tape, attach a take identification number 15# to the cassette tape, attach the A side to the cassette deck, and input #15A# from the numeric keypad 109g. As a result of this operation, #15A# is set in the input register (not shown), and if the display changeover switch 109q has selected the tape identification number, #15A# is set.
is displayed on the display section 109k. Next, when the entry key 109h is pressed, the tape identification number and set side #15A# stored in the input register are transferred to the processing device 107.
a and set in the built-in general-purpose register 107a'. After that, the processing device 107a uses the RAM 107
The recording time code is read from the storage area corresponding to the tape identification number #15# of a. Now, tape identification number #15
The storage area of # is all zero, and the recording time code is also #
OO#, the processing device 107a uses the operation panel 1
The lamp 109p on 09 is turned on to prompt input of the recording time. When the sweeper uses the key 109m to input the maximum recording time of the cassette tape loaded on the deck, the processor 107a reads the maximum recording time Tr, stores it in the general-purpose register 107a', and stores it in the RAM.
107c in the storage area corresponding to the tape identification number #15#. In this state, when the recording button 109b is operated, the tape rotates forward at the recording speed and the tape runs. As the tape runs, pulses with frequencies proportional to the rotational speeds fa and fb of the left and right reels 101a and 101b are manually applied to the absolute position detection means 103 from the pulse generators 102a and 102b. Abunlute potion detection means 10
3 calculates the absolute position using fa, fb and the maximum recording time Tr or single-sided tape length Lt, etc., with the rewound position as the reference position (zero), sets it in the register 104 in real time, and The absolute value is displayed on the display section 105. Incidentally, the single-sided length Lt is obtained from the recording time-tape length correspondence memory 107d.

Thereafter, recording continues, and during this time the processing device 107a reads the contents (absolute position) of the current position longing register 104 at a predetermined short cycle, and the recording time storage area of side A of tape identification number #15# is corrupted. Update the absolute position.

Then, when the stop button 109a or the pause button 109f is pressed at the end of recording, tape running stops, and the absolute position at that time is stored in the storage area corresponding to the tape identification number #15 of the RAM 107c. . After that, perform operations such as rewinding and rewinding, and then remove the cassette tape. Now, if you want to make another recording on the cassette tape with the tape identification number #15# from the previous recording end position at a later date, you can search for the recording start position by the following operation. That is, if you set the cassette tape with tape identification number 15 on the deck as set side A, and at the same time enter 15# from the numeric keypad 109g and press the entry key 109h, #15A# will be transferred to the processing device 107.
a and set in general-purpose register 107a'. - After that, the processing device 107a stores the RAM 107c.
The recording time is read from the storage area corresponding to the tape identification number #15#. Since the recording time has already been set in the RAM 107c due to the first use, the processing device displays a predetermined maximum recording time display lamp 109n according to the recording time.
lights up. In this state, record position search mode key 10
When 9i is pressed, the processing device 107a reads the recording start position Lc of side A from the storage area corresponding to the tape identification number #15# of the RAM 107c, sets it in the register 110, and generates a comparison enable signal CEBL to the comparator 111. . If the absolute position La is not currently set in the value register 104, the motor is rotated in any direction for a predetermined period of time to set the absolute position La.
is set to 104. The comparator 111 determines the magnitude of the current absolute position La and the recording start position Lc, and outputs a forward rotation command NRS and a reverse rotation command RRS to the motor control circuit 112 depending on the magnitude, and fast-forwards the motor on the supply side or winding side. Rotate at high speed. Then, when La and Lc match, the rotation is stopped by a stop command STS generated from the comparator circuit 111, and the cueing to the recording start position is completed.

However, if servo control is performed to apply deceleration when |Lc-La| becomes less than a predetermined value, more accurate cueing can be achieved. After cueing is completed, recording is started in the same manner as above.

On the other hand, if he wants to know the remaining recording time Tn' (remaining recording time) of a cassette tape, he enters the tape identification number and side information of the tape he wants to know the remaining recording time using the above operation, and then presses the display changeover switch 109q. Set "Remaining recording time". When the display changeover switch is set to "remaining recording time", the processing device 107a reads the maximum recording time and recording start position Lc from the storage area of the RAM 107c corresponding to the manually entered tape identification number, and reads the maximum recording time Tr for one side and the recording start position Lc. The tape running time Tc (at the recording or playback speed) up to the recording start position Lc is determined, and the remaining recording time Tn is calculated using the following formula: Tn=Tr-Tc (1) and displayed on the display section 109k. Note that the tape running time Tc to the recording start position is Tc = Lc if the absolute position is expressed by the tape running time, and if the absolute position is not expressed by the tape running distance, the tape length on one side is If it is Lt, it can be obtained from Tc=(Lt-Lc)/Lt·Tr (2).

Next, the song selection operation will be explained. It is assumed that for each cassette tape, the correspondence relationship between the track number and absolute attachment on the front side, and the track number and absolute position on the B side are stored in advance in the RAM 107c in the manner shown in FIG. 3.

First, manually input the tape identification number (#20#) of the cassette tape set on the deck and the set side (the front side is referred to as the set side) using the numeric keypad 109g, and then press the entry key 109h. When the entry key 109h is depressed, the tape identification number (#
20#) and the set plane are immediately read and set in the general-purpose register 107a' by the processing device 107a. Thereafter, when the desired song number is inputted from the numeric keypad 109g and the song selection start button 109j is pressed, the song number is read by the processing device 107a, and side A is thereby read from the storage area of the RAM 107c corresponding to the tape identification number 20. The absolute position Lc of the desired song number is read out and set in the register 110. Next, the processing device 107a uses the comparator 111.
A comparison enable signal CEBL is generated.

The comparator 111 determines the magnitude of the current absolute position La and the absolute position Lc of the desired track number, and issues a forward rotation command NRS and a reverse rotation command RRS to the motor control circuit 11 depending on the magnitude.
2 and rotates the left and right reel drive motors at high speed at a fast forward speed. Then, when La=Lc matches, the rotation is stopped by a stop command STS generated from the comparator circuit 111, and the cueing of the desired song number is completed. still,
It is also possible to decelerate and stop when ILc-LaI becomes less than a predetermined value.

In addition, in the above, input the desired song number and add the beginning of the desired song head (
The absolute position Lc is determined, and the song selection is completed when the current absolute position La matches the absolute position Lc, but the music selection may be performed as follows.

That is, when the song number Mt of the desired song is input and the music selection start button 109j is pressed, the current absolute position L is
The song number Ma (currently selected song number) corresponding to a is
It is determined from the correspondence between the track number and tape position stored in the RAM 107c, and the tape is run in a predetermined direction in fast forward according to the magnitudes of Ma and Mt, and when an unrecorded part between songs is detected, the current track number is run. It is also possible to count up or down one by one depending on the force direction, and to complete the song selection when Ma=Mt. Ma can also be determined from the tape identification number by storing the currently selected song number Ma in the RAM 107c for each cassette tape.

FIG. 4 is a block diagram of the unrecorded portion detection section.

The unrecorded portion detection section 201 determines the level of the reproduction signal output from the reproduction circuit 202, and outputs the unrecorded signal NRS#1# when the level is below a predetermined level, and outputs the unrecorded signal NRS#1# when the level is above a predetermined level.
When the level detector 201a that outputs 0, the not gate 201b, the flip-flop 201c that is set and reset by the no-recording signal NRS, and the flip-flop 201c are set, in other words, no-recorded portions are detected. When the output pulses of the AND gate 201d, the OR gate 201e, and the AND gate 201d are counted, and the flip-flop 201c is about to be reset. A counter 201f whose counted value is cleared to zero, a preset register 201g whose counted value is preset to a value Np corresponding to a predetermined tape length, and the magnitude of the counted value Nc of the counter 201f and the blind value Np are determined, A comparator 20 that outputs a non-recorded portion detection signal NRD when Np≦Nc.
1h and a flip-flop that is set by the positive pulse +P generated from the rotation direction discrimination circuit 203 and reset by the negative pulse -P, in other words, a flip-flop that is set when the rotation is in the forward direction and reset when the rotation is in the reverse direction. The AND gate 201j outputs the non-recorded portion detection signal NRD as the count-up pulse Pu when the flip-flop 201i is in the forward direction (when the flip-flop 201i is set), and the
when flip-flop 201i is being reset)
Countdown pulse Pd for unleaded tone portion detection signal NRD
It has an ant gate 201k that outputs as follows. 2
04 is set to the current track number Ma, and counts up every time a count-up pulse Pu output from the unrecorded portion detecting section 201 occurs, and counts down every time a count-down pulse Pd occurs to determine the beginning position of the cassette tape. This is a reversible counter that stores the number of unrecorded parts from , in other words, the program number Ma of the currently selected song. The rotational direction determining circuit 203 receives the two-phase pulses Pa and Pb from the pulse generator 102a, and determines the rotational direction by seeing which pulse is leading in phase. , and generate one so-called pulse -P every predetermined rotation of the reel.

By the way, in the present invention, the remaining playing time of the currently playing song can be displayed. That is, during the performance or after the song selection is completed, the display changeover switch 109q is set to "remaining performance time". By switching the display changeover switch, the processing device 107a stores the currently selected track number Ma of the cassette tape fully loaded on the deck in the RAM 107c using the current absolute position La (contents of the register 104). This is determined from the correspondence between the track number and the tape position, and then the absolute position Lc of the (Ma+1)th track number is determined. As a result, if the absolute positions La and Lc are the tape running time, the remaining performance time Tm is Tm = Lc - La (3), and if the absolute position is the tape running distance, the tape length of one side is Lt, and the maximum recording time is Tm = Lc - La (3). If the possible time is Tr, the remaining performance time Tm can be obtained from Tm=(Lc-La)/Lt·Tr (4).

As described above, according to the present invention, the recording start position of each cassette tape is stored in the memory, the current position is recognized in real time by the absolute position detection means, and the tape is run to match the absolute position with the recording start position. As a result, the search for the recording start position can be completed, and the recording start position can be searched for in a short time and with a simple operation.

Furthermore, according to the present invention, a memory area is allocated corresponding to each cassette tape, and the correspondence between the track number and its absolute position is stored in the memory area. Determine the absolute position. Therefore, a song can be selected by running the tape so that the current absolute position, which has not been detected by the absolute position detection means, matches the absolute position of the desired song.
It is possible to control the number of songs and to shorten the time required for selecting songs.

According to the present invention, the walking tape running angle or the tape running time (absolute position) can be determined using an absolute position detection means (referred to as a real-time counter or an electronic linear counter and installed in a cassette). Because of this, even after listening to the cassette tape on a car stereo or lending it to a friend, the absolute position at that time can be recognized correctly, so you can search for the recording start position and perform song selection operations without the need for any adjustment operations. can be done.

In addition, according to the present invention, the maximum recordable time and the recording end position (the starting position of the next nail sound) are memorized for each cassette tape, so it is possible to easily know the remaining recording time and to record a certain performance from a record. It is effective because it allows you to judge whether or not you can add and record time songs or FM broadcasts.

Furthermore, it is possible to easily know the remaining playing time of the song being played, which is useful for tabbing and the like.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a diagram of RAM storage contents, Fig. 3 is an explanatory diagram of the relationship between song numbers and absolute positions, and Fig. 4 is a block diagram of the free sound part detection section. It is. 101a, 101b...left and right reels, 102a, 10
2b...Pulse generator 103...Absolute position detection means, 104...Current position register 105...Display section 107...Computer 107
a... Processing device, 107c... RAM, 108...
・Nonvolatile memory, 109...Operation panel 110...Register, 111・
... Comparator 112 ... Motor control circuit patent applicant
Saito Senkikan 3) Getsada-A [” [shi5■”n Tai

Claims (8)

[Claims] (1) In a cassette device that records signals on a cassette tape and plays back the recorded signals, an absolute position detection means for detecting the absolute position of the tape from a reference position, and a means for inputting or identifying the name given to the cassette tape. and a memory having a storage area corresponding to each cassette tape, and a processing device that writes data to the memory or reads data from the memory and performs predetermined processing, and the memory has a memory having a storage area corresponding to each cassette tape. is stored in memory, the name of the cassette tape loaded in the cassette deck is input or identified, the desired tape position is read from the storage area, and the tape is run to bring the absolute position of the tape to the desired tape position. A cassette device that allows you to quickly find the cue. (2) The cassette tear according to claim (1), wherein the desired tape position is set to the current recording start position. (3) The cassette device according to claim (1), wherein the desired tape position is set as a playback start position. (4) The cassette device according to claim 1, wherein the desired tape position is the beginning position of the first song recorded on the cassette tape. (5) The cassette device according to claim (4), wherein the beginning position of each of the songs in the number of songs is stored in correspondence with the song number. (6) A cassette device characterized in that a song number is input, the beginning position of the song corresponding to the song number is read from the storage area, and song selection is completed when the absolute position of the tape matches the beginning position. . (7) A switch for requesting remaining performance time display is provided on the operation panel of the cassette device, and by requesting remaining performance time display,
The starting position (end position of the currently selected song) of the song next to the song that is currently being played is read out from the storage axis area, and the remaining performance is determined based on the difference between Lc and the current tape absolute position La. The cassette device according to claim 4, characterized in that the time is determined and displayed on the noodle-making display. (8) A switch for requesting display of remaining recording time is provided on the operation panel of the cassette device, and the maximum recording time is stored in the memory, and upon requesting display of remaining recording time,
The maximum recording time Tr and recording start position are retrieved from a predetermined storage area, the tape running time Tc is determined from the button sound start position, the remaining recording time is determined based on the difference between Tr and Tc, and the display device is Patent Rinkyu No. 1 (
Cassette damage as described in section 2).