JP2581499C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc record reproducing apparatus suitable for, for example, a DAD (digital audio disc) of a CD (optical compact disc) system, and particularly to a display system thereof. . 2. Description of the Related Art In recent years, in the field of audio equipment, a digital recording / reproducing method using a PCM (pulse code modulation) technique has been adopted in order to achieve as high fidelity reproduction as possible. In other words, this is called digital audio, and the audio characteristics do not depend on the characteristics of the recording medium, and should be much better than those using the conventional analog recording / reproducing method. This is because it is established in principle. In this case, a system that targets a disk (disk) as a recording medium is called a DADD system, and optical, electrostatic, and mechanical systems have been proposed as recording and reproducing systems. Even if the above-mentioned method is adopted, it is required that a reproducing apparatus which can realize the above-mentioned method can satisfy various advanced control functions and performances which cannot be found in the conventional method. That is, in the case of the CD system, for example, the diameter is 12 cm and the thickness is 1 cm.
. A disk made of a 2 mm transparent resin disk on which a metal thin film for forming bits (irregularities having different reflectivities) corresponding to digitalized (PCM) data is deposited on a disk having a CLV (constant linear velocity) method of about 500 to 200 rpm. p. m is rotated at a variable rotation speed of m, and the disk is loaded with a semiconductor laser and a photoelectric conversion element and reproduced by an optical pickup in a linear tracking manner from the inner peripheral side to the outer peripheral side. An enormous amount of information, which has a pitch of 1.6 μm and can reproduce about 1 hour of stereo even on one side, is recorded in the program area (radius 25 to 58 mm), and the minimum and maximum song numbers are included. Lead-in area (radius 2
3 to 25 mm). DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in this type of conventionally known disc record reproducing apparatus, in particular, it has excellent operability and rich display to satisfy its advanced control function. It was considered an urgent problem to be solved because things had not been realized. Therefore, an object of the present invention is to provide a disc record reproducing apparatus having a display function that can reliably and easily understand the operation and operation state for a user with a simple configuration and that has a display function that reduces user's erroneous recognition. . According to the present invention, there is provided a disc record reproducing apparatus for reproducing a disc in which address data for identifying a plurality of digitized data are recorded. First means for designating address data corresponding to the data and obtaining an instruction signal for search operation start and search operation completion in order to perform a search operation; and the search operation from the first means. Second means for obtaining a first state output substantially in synchronization with the start instruction signal and obtaining a second output state output in substantially synchronization with the search operation completion instruction signal from the first means; A third means for displaying the address data corresponding to the one data to be searched specified by the first means, and from the start of the search operation to the completion of the search operation.
In response to the first state output from the second means, the address data corresponding to the data to be searched displayed on the third means is turned on and off. And a fourth means for canceling the blinking state of the address data displayed on the third means and constantly turning on the light according to the second state output from the means. According to the above configuration, the address corresponding to the music number is displayed, and it is easy to instantly understand whether the search operation is being performed or the search is completed. It is designed to make it easy to instantly understand whether the user is present, and to prevent user misunderstanding. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, an outline of a CD type DAD reproducing apparatus to which the present invention is applied will be described. That is, FIG. 1 shows a front external view, and FIG. 2 shows an external front external view of the display unit shown in FIG. 1. In FIG. This is a disk loading unit of the type. An eject (EJECT) key 1 for opening and closing the disc loading section is provided on the left side of the disc loading section 111.
12 and a power (POWER) key 113 for power connection / disconnection. A display unit 114 for making various displays to be described later and a reverse (REV) key 115 for so-called backward operation are provided on the upper right side of the disc loading unit 111.
First forward (FF) key 116 for fast forward operation
A play (PLAY) key 117 for a play operation is provided. Similarly, a middle play (NEXT PLAY) key 118 and a repeat (REPEAT) key 119, and a pause (PAUSE) key 120 and a stop (STOP) key 121, which will be described later, are provided in the middle row. Similarly, the lower row is 0,1
, 2,... 9 and a memory read (MREAD) key 132
And MEMORY key 133 and CLEAR key 1
34 are provided. The display unit 114 shown in FIG.
a, search (SEARCH) display 114b, error (ERROR) display 11
4c, REPEAT indicator 114d, MANUAL
Display 114j, auto play (AUTO) display 114e, memory (MEMO)
RY) display 114f and 8-channel memory indicator (MEMORY)
INDICATOR) 114g and music number (MUSIC No.) display 114h
And a time (TIME) indicator 114i. Note that the play (PLAY) key 117 and the pause (PAUSE) key 120
During each play (PLAY) display 114k and PAUSE (PAUSE)
An indicator 114L is provided. FIG. 3 shows an electric circuit system of the DAD reproducing apparatus of the CD system shown in FIG. 1, and includes a microcomputer, an interface circuit, and the like by selectively operating the keys 112, 115 to 134 described above. The control circuit 201 controls the distor reproduction system 202 to a predetermined state, and the display unit 114 performs necessary display. That is, when the disk motor 204 and the pickup feed motor 205 are driven from the control circuit 202 via the external control circuit 203 by the control circuit 202, the data recorded on the disk 206 is reproduced by the pickup 207, and the reproduction signal To the RF signal detection circuit 208. This RF signal detection circuit 2
08 separates the reproduction signal into a signal to be supplied to the servo circuit 209 and a signal to be supplied to the demodulation circuit 210. Here, the servo circuit 209 performs focus servo and tracking servo with respect to the pickup 207,
And various signals for performing the linear tracking servo. Further, the demodulation circuit 210 separates a synchronization signal for address detection from the reproduction signal, supplies the synchronization signal to the address detector 211, and demodulates (EFM) the reproduction signal from which the synchronization signal has been separated to obtain a D / D signal. It is supplied to the A converter 212. Then, the address signal detected by the address detector 211 is taken into the RAM 213 via the control circuit 201, and is provided to perform a necessary control function. The reproduced data returned to the analog signal by the D / A converter 212 is processed by the speaker 21 with necessary error correction, dinterleaving, error correction, and the like.
6 will be provided for driving. In FIG. 3, reference numeral 214 denotes a ROM for driving the control circuit 201 by a predetermined program, and 215 denotes a display output control circuit for driving the display unit 114 in a predetermined state. Next, the functions of the keys 112, 115 to 134 and the display unit 114 in FIGS. 1 to 3 will be described. [Numerical 0 to 9 keys 122 to 131] These are keys for inputting numerical values, and are used when designating a reproduction assistance at the time of searching (searching for a head) and writing to a memory. [MEMORY key 133] This key is used when writing numeric key data to a memory channel. [CLEAR] key 134 This key is used when the music number display 114h displaying the above-mentioned numeric key data is to display the original music number (address). Note that the memory read (MREAD) key 132 and the clear (CLEAR) key 1
When both of them are simultaneously operated, a memory all clear (ALLCLEAR) operation state is set. [Memory Read (MREAD) Key 132] This key is used to read the written contents of the memory channel. [Repeat key 119] Each time this key is operated, repeat (repeated reproduction) is turned on and off. However, when the power is turned on, the repeat function is off. [Play (PLAY) key 117] This key is used when used alone and when the memory read (MREAD) key 132
Alternatively, the operation may be performed after the operation of the numerals 0 to 9 keys 122 to 131. First, when used alone, the manual play mode is set. If the state immediately before operating this key is a pause state described later, the pause state is released and the play state is set. However, if the state immediately before operating the key is the array state in the auto play mode to be described later, the mode is shifted to the manual play mode, and if operated during the search operation, the play state is set after the search is completed. It has been made to be. Then, a memory read (MREAD) key 132 or numerals 0 to 9 keys 122
When used in combination with .about.131, a search operation state is set as the auto play mode, and the play state is set after the search is completed. Immediately before operating this key, an error (ERROR) display 114 described later
If c is blinking, this key operates the same as the CLEAR key 134. [PAUSE key 120] This key may be used alone, or may be operated following the operation of the memory read (MREA) key 132 or the numeric keys 0-9 keys 122-131. First, when used alone, if the state immediately before operating this key is the play state, the play state is canceled and the pause state is set. Further, when operated during the search operation, the system is brought into a pause state after completion of the search. Then, a memory read (MREAD) key 132 or numerals 0 to 9 keys 122
When used in combination with .about.131, a search operation state is set. If the error (ERROR) indicator 114c is blinking immediately before operating this key, this key operates in the same manner as the clear (CLEAR) key 134. [Next Press (NEXT PLAY) Key 118] First, when this key is operated in the manual play mode, a search operation with the next tune (actually, the next TNO: track number) as a target address is performed. It has been done. When this key is operated in the auto play mode, a search operation is performed with the contents of the next memory channel as a target address. Further, if this key is operated during a search operation, a search operation is performed with the target address next to the display TNO during manual play, and a memory channel next to the display memory channel during auto play mode. A search operation using the contents as a target address is performed. Note that the play / pause state is not shifted by this key operation. [First Forward (FF) Key 116] When this key is operated, a forward operation is started. When this key is operated in the auto play mode, a forward operation is performed while the key is operated, but if the position where the operation is stopped deviates from the music being played, the search operation of the next memory channel is performed. It is made to do. [Reverse (REV) key 115] When this key is operated, a backward operation is started. When a backward operation is performed in the auto play mode and the stop position deviates from the tune being reproduced, a search operation of a memory channel before the tune is performed. [Stop (STOP) key 121] When this key is operated, the mode is shifted to the manual play mode, and after the first music search is performed, a pause state is set. [Eject] key 112 When this key is operated during playback, the playback state is canceled. The disc motor stops, the laser diode turns off, and about one second after the pickup returns to the start position. The distor loading section 111 is opened. At the time of operating each of the above keys, a so-called CHIRP sound (output at about 3.5 kHz for 0.072 seconds) is generated as a proof that the key operation has been accepted. [EJECT indicator 114a] After the eject key 112 is repeatedly operated, it blinks at a cycle of about 3 Hz until it returns to the pickup start position, and lights up when the disc loading unit 111 is opened, and turns on when the disc loading unit 111 is opened. Is turned off when closed. [Search (SEARCH) Display 114b] TOC of the lead-in area recorded as index data on the disc (
When all the data of (table of contents) have been normally read, the light is turned on when the search for the first music has been completed. [Error (ERROR) Indicator 114c] When an error described later occurs, the point blinks at about 0.67 seconds and blinks at a cycle of about 1 Hz so as to decrease in about 0.33 seconds. The light turns off when about 10 seconds have elapsed or when the CLEAR key 134 is operated. The error occurrence state is as follows: (1) When about 20 seconds have elapsed since the distor was set upside down (2) The search operation was commanded by the numeric keys 0 to 9 keys 122 to 131, but the designated T
When NO is not present in the disc (3) The search operation is commanded by operating the memory read (MREAD) key 132 or the next play (NEXT PLAY) key 118 in the auto play mode. If the TNO does not exist in the disc, (4) if it is determined that the designated X (arbitrary address in a certain song) that has performed the search operation does not exist, (5) seconds have elapsed since the start of the search operation (6) Attempting to write TNO = 00 as memory channel data, (7) When all TNO data recorded on the disc could not be read normally, and so on. [Repeat (REPEAT) indicator 114d] The display is lit when the repeat function is on. [MANUAL Display 114j] The display is turned on in the manual play mode or the eject mode, and blinks during the reading of the lead-in area (about 3 Hz cycle). [Auto Play (AUTO) Display 114e] The display is lit in the auto play mode. [Memory (MEMORY) Display 114j] When the numeric keys 0 to 9 keys 122 to 131 are operated, they are turned on when memory writing is possible, and then turned off when about 10 seconds elapse or when a key other than the numeric keys is operated. Yes. [MEMORY INDICATOR 114g] In this case, a portion corresponding to a memory channel which has eight channels and is written in all states is turned on. In the auto play mode, a portion corresponding to the memory channel being reproduced is blinking (about 3 Hz cycle). When the numbers 0 to 9 keys 122 to 131 are operated, the portion corresponding to the writable minimum memory channel blinks (approximately 3 Hz cycle) in a memory writable state. Further, when the memory read (MREAD) key 133 is operated, the portion corresponding to the memory channel being read out blinks (about 3 Hz cycle). [Music number (MUSIC No.) display 114h and time (TIME) display 114i] These are composed of an eight-digit number display, and collectively form an address (data) display section. That is, TNO, X, MIN (minute),
This indicates SEC (seconds). In the eject mode, all the lights are turned off, and in the reproducing state, the address being reproduced is displayed. Also, when the numbers 0 to 9 keys 122 to 131 or the memory read (MREAD) key 133 are operated, only TNO and X are displayed, and MIN and SEC (elapsed time from the beginning of the first music) are blanked. Has been made. During the search operation, the TNO. X is flushed, and MIN and SECC are blanked. [Play (PLAY) Display 114k] The display is lit in the play mode. [PAUSE Indicator 114L] This is lit in the pause mode. Next, an embodiment of the present invention based on the above outline will be described. The present invention is characterized in that the display of the music number display 114h is flickered in the search operation state. Such a function can be realized by a configuration as shown in FIG. However, the same reference numerals in FIG. 4 denote the same parts as in FIG. 3, and a description thereof will be omitted. That is, the control circuit 201 is configured to include a search start detection circuit 11, a search circuit 12, and a search end detection circuit 13, which are omitted for simplicity of description. The search start detection circuit 11 is connected to the memory read (MREAD) key 132
The operation status of each of the play (PLAY) key 117, the pause (PAUSE) key 120, the next play (NEXT) key 118, and the numerical keys 122 to 131 is monitored to detect the state in which the search operation is to be executed. A detection pulse is output from the control output terminal OBS. The search circuit 12 drives the disc reproduction system 202 via the external control circuit 203 in a state where the control input terminal IS is at a high level, and controls the disc reproduction system 202 to perform a predetermined search operation. . When the search end detection circuit 13 detects that a predetermined search operation has been performed, its output terminal ORS is changed from a low level to a high level. The output terminal OBS of the search start detection circuit 11 is connected to a D-type flip-flop
Is connected to the clock input terminal CK. The flip-flop 14 has an input terminal D connected to the power supply VCC, an output terminal Q commonly connected to a control input terminal IBS of the search circuit 12 and an input terminal of a blink signal generation circuit 15 described later, and a reset terminal R connected to the input terminal. It is connected to the output terminal OES of the search end detection circuit 13. The blinking signal generation circuit 15 includes, for example, a low-frequency oscillator and a frequency divider, and has an output terminal connected to a control input terminal of the song number display 114h. A blink control signal is supplied. In addition,
The music number display 114h is supplied with data of the music number to be searched from the control circuit 201, for example, in the form of a BCD code. That is, in the device having the above configuration, the search start detection circuit 11 supplies a detection pulse to the clock input terminal CK of the flip-flop 14 in a state where the search operation should be started. Then, the flip-flop 14 outputs the output terminal Q
Is set to a high level to drive the search circuit 12 and the blink signal generation circuit 15. As a result, the search circuit 12 starts a predetermined search operation. At the same time, the blink signal generation circuit 15 supplies a blink control signal to the control input terminal of the music number display 114h. As a result, the song number display 114h displays the display data (in this case, TNO and X of the song to be searched) supplied from the control circuit 201 while blinking. When the end of the search operation is detected by the search end detection circuit 13,
The flip-flop 14 is reset, and its output terminal Q goes from high to low. For this reason, the blinking signal generation circuit 15 stops outputting the blinking control signal, and the display of the music number display 114h is always lit. The repeated blinking display as described above has a great visual effect, makes it possible to clearly understand that the search operation is being performed, and uses the contents of TNO and X of the music to be searched. It is possible to make a strong impression on people.
Also, since the end of the search operation can be clearly understood, for example, the search (SEARCH)
3.) The display 114b may be unnecessary, and may contribute to the reduction in the number of components of the disc record reproducing apparatus. In the above embodiment, the address to be searched is displayed on the music number display 114h, but the address read from the disk may be displayed. Further, according to the above-described embodiment, since the state for reading preparation for reading the index data is displayed, the user does not misunderstand the state of preparation for reproduction as a failure. Further, since the first song is searched by detecting the address after reading the index data, the time required for transition from the reproduction preparation state to the reproduction state is short. It goes without saying that various modifications and applications are possible without departing from the gist of the present invention. As described above, according to the present invention, the address corresponding to the music number is displayed, and it is instantly known whether the search operation is being performed or the search is completed.
It makes it easy to instantly understand what song number is being searched, and the user does not misidentify.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a front external appearance of a disc record reproducing apparatus to which the present invention is applied. FIG. 2 is a diagram showing a front appearance of a display unit shown in FIG. FIG. 3 is a block diagram used for explaining an outline of an electronic configuration of the disc record reproducing apparatus shown in FIG. 1; FIG. 4 is a block diagram showing a main part of the disc record reproducing apparatus according to the present invention. [Description of Signs] 110 cabinet, 111 disk loading unit, 112 # eject key, 113 power key, 114 display unit, 115 reverse key, 116 first forward key, 117 play key, 118 next Play key, 1
11: repeat key, 120: pause key, 121: strip key, 122-
131 ... numeric key, 132 ... memory read key, 133 ... memory key, 134 ...
Clear key, 114a: Eject display key, 114b: Search display, 114
c: error indicator, 114d: repeat indicator, 114j: manual indicator, 1
14e: Auto play display; 114f: Memory display; 114g: Memory indicator; 114h: Track number display; 114i: Time display; 114k: Play display; 114L: Pause display; 201: Control circuit; Disc playback system,
203: external control circuit, 204: disk motor, 205: pickup feed motor, 206: disk, 207: pickup, 208: RF signal detection circuit,
209: servo circuit, 210: demodulation circuit, 211: address detector, 212: D
/ A converter, 213 RAM, 216 speaker, 214 ROM, 215 display output control circuit, 11 search start detection circuit, 12 search circuit, 13 search end detection circuit, 14 flip-flop, 15 Flashing signal generation circuit.

Claims (1)

Claims: 1. A disc record reproducing apparatus for reproducing a disc in which address data for identifying a plurality of digitized data is recorded, wherein one of the plurality of data is read. First means for designating address data corresponding to the data and obtaining a search operation start and search operation completion instruction signal for performing a search; and a first means for starting the search operation from the first means. Second means for obtaining a first state output substantially in synchronization with the instruction signal and obtaining a second output state output in substantially synchronization with the search operation completion instruction signal from the first means; A third means for displaying address data corresponding to the one data to be searched specified by the first means; and The first state output from the means causes the address data corresponding to the data to be searched displayed on the third means to blink, and after the search operation is completed, the address data from the second means is output. A fourth means for canceling the blinking state of the address data displayed on the third means by the second state output and for constantly turning on the address data. 2. The disk record reproducing apparatus according to claim 1, wherein said address data corresponds to a music number.