JP2002015521A - Disk-reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a sound dropout less likely to occur, even when a large vibration is temporarily applied to a disk by a sound pressure when sound volume is raised during listening using a built-in loudspeaker. SOLUTION: The disk reproducing device has shock proof functions 8 and 11, enabling the output of a reproduced signal without interruption even when reproduction of the disk is interrupted, a built-in loudspeaker 13 a device body, and outputs a reproduced signal as a voice. The device is provided with a shock proof on-off switch SW2 for making the shock-proof functions valid or invalid, a loudspeaker change-over switch SW1 for enabling listening of outputs from the loudspeaker, and a control means 18 for controlling output states of reproduced signals. A control means 18 activates the shock-proof functions by the on-operation of the loudspeaker change-over switch SW1, regardless of the valid or invalid state of the shock proof functions, before the on- operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable disk reproducing apparatus for reproducing recorded information from an optical disk as a recording medium and outputting sound from a built-in speaker.

[0002]

2. Description of the Related Art At present, as a portable disk reproducing apparatus, a CD (compact disk) player dedicated to reproducing an optical disk for audio, an MD (mini-disc) recorder capable of recording and reproducing, and a recording capacity are dramatically improved. D
VD (Digital Versatile Disc) players and the like have been put to practical use. Many of these devices have a so-called shock proof function to prevent sound skipping due to vibration during carrying, and some of them have a built-in speaker while being portable.

[0003] The shock proof function reproduces a signal recorded on a disk at a higher speed than a normal speed, stores the signal in a memory, and reads the signal at a normal speed. The reproduction signal can be output without interruption in the range of the storage, and if the optical pickup returns to the normal reading position in the meantime, skipping of sound can be prevented.

Further, among products having a shock proof function, there is a product configured to turn on / off the shock proof function. This is a choice between turning on the shock proof function to prevent sound skipping at the time of vibration and turning off the shock proof function to take measures against sound quality deterioration for compressing and storing in the shock proof memory. When the sound skipping countermeasures are emphasized, the shock proof function is set to ON.

[0005]

In such a portable disk reproducing apparatus, especially in a case where a speaker is built in, the speaker and the disk mounting position are arranged very close to each other in order to make the structure compact. Therefore, when the shock proof function is used in an OFF state, the sound volume is increased by increasing the volume of the loudspeaker, so that the disk is vibrated by the sound pressure.

[0006]

SUMMARY OF THE INVENTION In order to solve this problem, a disk reproducing apparatus of the present invention reproduces a signal recorded on a disk at a higher speed than a normal speed, stores the signal in a memory, and reads the signal at a normal speed. In addition to having a shock proof function that enables a reproduction signal to be output without interruption within the storage range of the memory even when interruption of reproduction of the disk occurs due to vibration, a speaker is built into the apparatus main body, and the What is claimed is: 1. A disk reproducing apparatus configured to be able to output a reproduction signal as sound, wherein a shock proof O for enabling or disabling the shock proof function is provided.
An N / OFF switch, a speaker changeover switch for enabling the reproduction signal to be heard by an output from a speaker,
Control means for controlling an output state of the reproduction signal in response to operation inputs of the shock proof ON / OFF switch and the speaker changeover switch, wherein the control means controls the shock proof before the operation by operating the speaker changeover switch. The shock proof function is enabled regardless of whether the function is enabled or disabled.

[0007] Thus, even if the volume of the speaker is increased and a large vibration is temporarily applied to the disk by the sound pressure while listening to the output by switching to the output from the built-in speaker, the shock proof function is activated and the sound is hardly skipped. You can do it.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a signal recorded on a disk is reproduced at a higher speed than a normal speed, stored in a memory, and read out at a normal speed. Has a shock proof function that enables a reproduction signal to be output without interruption in the storage range of the memory even when interruption of reproduction occurs, and a speaker is built into the apparatus main body, and the reproduction signal is output from the speaker. What is claimed is: 1. A disk reproducing apparatus configured to output sound, comprising: a shock proof ON / OFF switch for enabling or disabling the shock proof function; and a speaker changeover switch for enabling a playback signal to be heard from a speaker. The reproduction signal is input by operating the shock proof ON / OFF switch and the speaker switch. Control means for controlling the output state of the shock proof function by turning on the speaker change-over switch regardless of whether the shock proof function is enabled or disabled before the operation. During listening, switching to speaker output, even if the volume of the speaker is raised and a large vibration is temporarily applied to the disc due to the sound pressure, the shock proof function is activated and sound skipping is difficult. It has the effect of doing.

According to a second aspect of the present invention, in addition to the output section for the built-in speaker, an output section for headphones is provided as the reproduction signal output section, and the speaker changeover switch is connected to the output section for the speaker and the headphone. The control means is configured to enable or disable the shock proof function by operating the shock proof ON / OFF switch when the speaker changeover switch is switched to the headphone output side. The sound proof function can be enabled or disabled according to the listener's preference and output can be performed during listening with headphones.

According to a third aspect of the present invention, there is provided a sound quality switching means provided in a signal processing circuit for processing a signal reproduced from the disk, and a sound quality switching switch for performing an operation input for switching the sound quality switching means. The control means is configured to set the sound quality switching means to a predetermined sound quality state by turning on the speaker changeover switch, regardless of the state of the sound quality switching means before the operation. Even if the sound quality state of bass emphasis is appropriately switched to be used when listening by, when switching to the built-in speaker, by setting a predetermined sound quality state, that is, a flat sound quality state from low to high frequencies, particularly This has an effect that the apparatus main body can be forcibly switched from a low-tone emphasized sound quality state in which vibration is easily generated.

According to a fourth aspect of the present invention, the loudspeaker built in the apparatus main body is located at a position opposed to a disk mounted on a turntable for driving the disk, and is provided at a center of the disk supporting the disk. Even when the speaker and the disk face each other in this way, even if a large vibration is temporarily applied to the disk due to the sound pressure of the speaker, the shock The proof function acts to prevent sound skipping.

According to a fifth aspect of the present invention, the loudspeaker is built in a lid that can be opened and closed, and the loudspeaker is configured to be closest to the disk when the loudspeaker is closed. Has the effect that it can be configured to be the thinnest as a portable disk playback device incorporating a.

According to a sixth aspect of the present invention, there is provided a signal processing circuit for processing a signal reproduced from a disk by a pickup, and a speaker is incorporated in the apparatus main body to reproduce a reproduced signal output from the signal processing circuit. What is claimed is: 1. A disk reproducing apparatus configured to output sound as a sound from a speaker, comprising: a speaker changeover switch for enabling a user to listen to the reproduction signal by outputting the sound from a speaker; a sound quality changing means provided in the signal processing circuit; A sound quality changeover switch for performing an operation input for switching means, and control means for controlling an output state of the reproduction signal by operating inputs of the speaker changeover switch and the sound quality changeover switch, wherein the control means turns on the speaker changeover switch. By the operation, regardless of the state by the sound quality switching means before the operation, the sound The switching means is configured to set to a predetermined sound quality state. Even if the sound quality state of bass enhancement is appropriately switched to be used when listening with headphones, the sound quality is changed to the predetermined sound quality when switching to the built-in speaker. By setting the state, that is, a flat sound quality state from low to high frequencies, it is possible to forcibly switch and use the sound quality state in which bass is emphasized, in which the apparatus main body is likely to generate vibration.

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram of a disk reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of an apparatus main body showing a relationship between a disk and a speaker, FIG. 3 is a flowchart of the shock proof ON / OFF control, FIG. 4 is a flowchart of the sound quality switching control.

In the figure, 1 is an optical disk, 2 is a spindle motor for rotating the optical disk 1, 3 is an optical pickup for reading signals recorded on the optical disk 1, 4 is a driver for controlling the spindle motor 2 and the optical pickup 3, and 5 is The signal processing circuit processes a signal read by the optical pickup 3. The signal processing circuit 5 includes an RF amplifier 6, a reproduction processing unit 7, a memory controller 8, a sound quality switching unit 9, a D / A converter 10, and the like.
The D / A converter 10 processes the signal read by the D / A converter 10 and outputs it as an analog signal, and also generates a signal related to focus control and tracking control and a signal for maintaining rotation at CLV (constant linear velocity) to generate a driver. 4 Further, the memory controller 8 writes / writes the digital audio data supplied from the reproduction processing unit 7 to the shockproof memory 11 composed of a RAM used as a data buffer.
Perform reading. The analog signal output from the signal processing circuit 5 is supplied to a built-in speaker 13 via a speaker amplifier 12.
And a headphone 17 connected to a cord 16 via a headphone amplifier 14 and a jack plug 15.

Reference numeral 18 denotes a system controller, 19 denotes a display unit, and 20 denotes an operation unit. System controller 18
Controls the controlled parts of the apparatus, such as the signal processing circuit 5, based on data from the signal processing circuit 5 and operation signals from the operation unit 20, and details thereof will be described later. Display 1
9 performs various displays necessary for the user under the control of the system controller 18. Operation unit 2
0 means that the output is output to the speaker 13 or the headphone 17
Switch SW1 for switching whether to output to the speaker
And a shockproof ON / OFF switch S for switching between enabling and disabling the shockproof function
W2, sound quality changeover switch SW3, and reproduction /
Multiple switches SW4 to S required for stop / other operations
Wn.

Here, the shock proof function of the memory controller 8 and the shock proof memory 11 will be described. The shock proof function can be enabled or disabled by a shock proof ON / OFF switch SW2. When OFF is selected, the disk 1 is controlled by the system controller 18. The data is reproduced at a normal speed, and the reproduced data is processed and output by the signal processing circuit 5. At this time, the memory controller 8 processes the data without writing to the shockproof memory 11,
It will output at normal speed. On the other hand, when ON is selected by the shock proof ON / OFF switch SW2, under the control of the system controller 18,
To enable the shock proof function, the disk 1 is played back at a higher speed than the normal speed, and the memory controller 8
Writes the data supplied from the reproduction processing unit 7 into the shock proof memory 11 at a predetermined rate higher than the normal speed, reads the data written in the shock proof memory 11 at the normal speed rate, and It is supplied to the sound quality switching section 9.

The memory controller 8 compresses and writes data when writing to the shock proof memory 11, so that the storage time can be lengthened by the compression or the capacity of the memory 11 can be reduced. Since the storage in the shock proof memory 11 is performed by compression, the sound quality of the reproduced signal when the shock proof function is enabled is slightly lower than the sound quality when the shock proof function is disabled. In order to avoid this state, a shock proof ON / OFF switch SW2 is provided,
Listener preference, "prevent sound skipping" and "emphasis on sound quality"
You can choose.

The sound quality changeover section 9 is provided with a sound quality changeover switch SW3.
According to the operation, the sound quality can be switched under the control of the system controller 18. For example, a sound quality characteristic that is flat from low to high as "sound quality 1" and a sound quality characteristic in which a low range is emphasized as "sound quality 2" The "sound quality 3" can be switched to a sound quality characteristic or the like in which a sound leakage band of headphones is attenuated in addition to emphasizing a low sound range. For example, each time the push button switch is pressed,
The configuration is such that "sound quality 1"-"sound quality 2"-"sound quality 3" can be sequentially switched. Then, from the signal processing circuit 5,
A signal corresponding to the sound quality characteristic set by the sound quality switching unit 9 is D /
The signal is output as an analog signal via the A converter 10.

The analog signal output from the signal processing circuit 5 is supplied to a speaker amplifier 12 and a headphone amplifier 14, and both amplifiers 12 and 14 operate so that one of them operates and the other is muted. 18. That is, the speaker 13 is controlled by the speaker switch SW1.
The system controller 18 operates to apply a mute control signal to either of the amplifiers 12 and 14 by performing an operation of switching between output to the amplifier and output to the headphones 17. For example, in FIG. 1, if the switching terminal H is on the headphone side and the switching terminal S is on the speaker side,
The state shown is switched to the headphone side,
The mute control signal is applied to the speaker amplifier 12 side. By switching in this state, a mute control signal is applied to the headphone amplifier 14 side, the speaker amplifier 12 side is released, and the speaker is turned on.

The arrangement relationship between the built-in speaker 13 and the disk 1 is configured as shown in the sectional view of the apparatus main body shown in FIG. In the figure, 21 is a main body cabinet, 22 is an intermediate cabinet fixed to the main body cabinet 21, 2
Reference numeral 3 denotes a lid cabinet that can be freely opened and closed. An optical disk reproducing unit 24 integrally formed with the spindle motor 2 and the optical pickup 3 is attached to the main body cabinet 21 and the intermediate cabinet 22, and the disk 1 is mounted on a turntable 26 formed on a spindle 25 protruding above the central part. It is placed. On the other hand, the built-in speaker 13
Are provided for stereo reproduction, and are attached between the sound hole portion 27 and the inner cover 28 in the lid cabinet 23. The front surface of the lid cabinet 23 is covered with a decorative plate 29, The speaker 13 is configured to emit sound through a net portion 29a of a decorative plate 29 formed at a position facing the portion 27. Here, a concave portion 28a is formed in the central portion of the inner cover 27 to avoid the spindle 25 protruding from the disk 1, and a position facing the speaker 13 is a thin portion 28b.

When the lid cabinet 23 is closed, the disk 1 and the built-in speaker 13 placed on the turntable 26 interpose the thin portion 28b of the inner cover 28 as shown in FIG. , And are arranged very close to each other, and the protruding spindle 25 is in a state of entering the concave portion 28a. With such a configuration, it is possible to reduce the overall thickness of the portable disk player. On the other hand, the disk 1 is in a state of being easily susceptible to vibration due to the sound pressure of the speaker 13.

Next, the operation of the disk reproducing apparatus configured as described above will be described with reference to the flowcharts shown in FIGS.

First, the processing of the relationship between the shock proof function and ON / OFF of the speaker changeover switch will be described. In FIG. 3, at step 1 (hereinafter abbreviated as S1 / abbreviated as step 2), it is determined whether the shock proof function is to be turned on, and the shock proof is turned on.
If there is no operation by the / OFF switch SW2, S2
To “Shockproof OF” in S3 to S6.
F processing ”. If there is an ON operation in S1,
Proceeding to S7, the "processing by turning on the shock proof" in S8 to S12 is performed.

In S3, it is determined whether or not the shock proof ON / OFF switch SW2 is further pressed. If not, the process proceeds to S4. In S4, the speaker changeover switch SW is switched.
It is determined whether or not 1 is a speaker ON, and if it is not ON, the process proceeds to S5. At S5, a disk reproducing operation process in a shock proof OFF state is performed.
At F, the operation processing of the headphone output ON state is performed, and the processing returns from S6 to S3 and is repeated. According to the judgment in S3, the shock proof is ON / OF.
When it is determined that the F switch SW2 has been further pressed, S7 is performed.
When the speaker switch SW1 is determined to be speaker ON in the determination of S4, the process proceeds to S7 and shifts to "processing by shock proof ON".

In S8, it is determined whether the speaker changeover switch SW1 is turned off and the shock proof ON / OFF switch SW2 is further pressed. If not, the process proceeds to S9. In S9, the disk reproducing operation in the shock proof ON state is performed. The process is performed, and in the next S10, it is determined whether or not the speaker changeover switch SW1 is turned on. If it is turned on, the process proceeds to S11, and if not, the process proceeds to S12. S
In the step 11, the operation process of the speaker output ON state is performed when the headphone output is OFF, and in the step S12, the speaker output is OFF.
Then, the operation process of the headphone output ON state is performed, and the process returns to S8 from S11 and S12 and is repeated. If it is determined in S8 that the shock proof ON / OFF switch SW2 has been further depressed, the process proceeds to S7, in which the process shifts to "processing by shock proof OFF".

As is apparent from the processing of FIG. 3, the speaker changeover switch SW is switched from the listening state through the headphones.
1 is switched to the speaker ON, even if the state before the switching is the state by the “shock proof OFF processing”, the forcible switching is performed to shift to the “shock proof ON processing”, and the speaker switch SW1 Until S is switched to speaker OFF.
The processing of 8-S9-S10-S11-S8 is repeated, and even if sound skips due to the vibration of the speaker 13 due to the vibration of the speaker 13 when the volume is increased, the shock proof function operates and the speaker 13 is operated. Output can prevent sound skipping. By pressing the shock proof ON / OFF switch SW2 in a state where the speaker changeover switch SW1 is switched to the speaker OFF and the listening state by the headphones 17 is switched, S
8 to S2.
F ".

Next, with reference to FIG. 4, a description will be given of the processing of the relationship between the sound quality changeover switch SW3 and the ON / OFF of the speaker changeover switch SW1.

In S21, it is determined whether or not the speaker changeover switch SW1 is ON, and if ON, the process proceeds to S22,
In S22, regardless of the previous state of the sound quality switching section 9, the state is switched to "sound quality 1", that is, a state of flat sound quality characteristics, and this processing ends. If it is not ON in S21, the process proceeds to S23, and in S23, it is determined whether or not the sound quality switch SW3 has been pressed, and if not, the process ends. When it is determined that the button has been pressed in S23,
Proceeding to S24, here the output is switched to (1)-(2)-(3) each time the sound quality switch SW3 is pressed,
Proceeding to S25, S26 and S27 sequentially,
Then, the sound quality switching unit 9 is switched to "sound quality 1", to "sound quality 2" in S26, and to "sound quality 3" in S27.

That is, when the speaker changeover switch SW1 is in the speaker ON state, the sound quality changeover switch SW3 is not accepted no matter how much it is pressed, and the "sound quality 1" state, which is a flat sound quality characteristic, is maintained. Since it is not possible to switch to the "sound quality 2" of bass emphasis, in which vibration is likely to occur due to the sound pressure at the time of sound, it is possible to minimize the occurrence of sound skipping on the disc 1 due to the vibration due to the sound pressure of the speaker 13. Becomes Even if abnormal sound volume occurs in the “sound quality 1” state, even if sound skipping occurs due to the vibration of the disc 1 due to the sound pressure of the speaker 13, the speaker O
In the state of N, the sound skipping can be prevented because of "processing by shock proof ON".

In the listening state using the headphones with the speaker turned off, the sound quality can be switched to the sound quality according to the listener's preference. Is what you can do.

[0033]

As described above, according to the present invention, the signal recorded on the disk is reproduced at a higher speed than the normal speed, stored in the memory, and read at the normal speed, and the reproduction of the disk is interrupted by vibration. In addition to having a shock proof function that enables a playback signal to be output without interruption in the storage range of the memory even when a problem occurs, a speaker is built into the apparatus main body, and the playback signal can be output as sound from the speaker. A shock proof ON / OFF switch for enabling or disabling the shock proof function, a speaker changeover switch for enabling the playback signal to be listened to from a speaker, and the shock proof function. ON / OFF
Control means for controlling an output state of the reproduction signal by an operation input of a switch and a speaker changeover switch, wherein the control means activates or invalidates a shock proof function before the operation by turning on the speaker changeover switch. It is configured to enable the shock proof function irrespective of the state. During listening by switching to the speaker output, the volume of the built-in speaker is increased and the sound pressure temporarily causes large vibration to be applied to the disk. Also,
An advantageous effect is obtained in that the shock proof function acts to make sound skipping difficult.

[Brief description of the drawings]

FIG. 1 is a block diagram of a disk reproducing apparatus according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a reproducing apparatus main body showing a relationship between the disk and a speaker.

FIG. 3 is a flowchart of the shock proof ON / OFF control.

FIG. 4 is a flowchart of the sound quality switching control.

[Explanation of symbols]

 Reference Signs List 1 optical disk 2 spindle motor 3 optical pickup 4 driver 5 signal processing circuit 8 memory controller 9 sound quality switching unit 11 shock proof memory 12 speaker amplifier 13 speaker 14 headphone amplifier 17 headphone 18 system controller 20 operation unit SW1 speaker switching switch SW2 shock proof ON / OFF switch SW3 Sound quality switch 21 Body cabinet 23 Lid cabinet 25 Spindle 26 Turntable

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kotaro Kashima 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Hitoshi Okagami 1006 Kadoma Kadoma Kadoma City Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd (72) Inventor Koji Nakahara 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd.F-term (reference) 5D020 CE03 5D044 BC03 CC06 DE03 DE12 DE17 DE23 DE39 FG10 FG24 GK10

Claims (6)

[Claims] 1. A signal recorded on a disk is reproduced at a speed higher than a normal speed, stored in a memory, and read out at a normal speed. A disk playback device having a shock proof function that enables output of a playback signal without interruption in a range, and having a built-in speaker in the device body and capable of outputting the playback signal as sound from the speaker, Operation of a shock proof ON / OFF switch for enabling or disabling the shock proof function, a speaker changeover switch for enabling the playback signal to be heard by a speaker output, and operation of the shock proof ON / OFF switch and speaker changeover switch Control means for controlling an output state of the reproduction signal by an input. Wherein, by ON operation of the speaker selector switch, the disc reproducing apparatus characterized by being configured so as to enable the shock-proof function regardless enabled or disabled state of the operation before the shockproof function 2. An output unit for outputting a reproduction signal to a headphone in addition to an output unit for the built-in speaker, wherein the speaker changeover switch switches between output to the speaker and output to headphones. Wherein the control means is capable of switching the shock proof function to a valid or invalid state by operating the shock proof ON / OFF switch when the speaker changeover switch is switched to the headphone output side. 2. The disk reproducing apparatus according to claim 1, wherein: 3. A sound quality switching means provided in a signal processing circuit for processing a signal reproduced from the disk; and a sound quality changeover switch for performing an operation input for switching the sound quality switching means, wherein the control means comprises a speaker. 3. The sound quality switching means is set to a predetermined sound quality state by an ON operation of a changeover switch, regardless of a state of the sound quality switching means before the operation.
Disc playback device described 4. A speaker built in the apparatus main body,
2. A disk reproducing apparatus according to claim 1, wherein said disk reproducing apparatus is arranged at a position facing a disk mounted on a turntable for driving said disk, and at a position avoiding a central spindle portion supporting said disk. apparatus 5. The disk playback apparatus according to claim 4, wherein the speaker is built in a lid that can be opened and closed, and the speaker is configured to be closest to the disk when the lid is closed. apparatus 6. A signal processing circuit for processing a signal reproduced by a pickup from a disk, and a speaker is built into the apparatus main body so that a reproduction signal output from the signal processing circuit can be output as sound from the speaker. A disk playback device, comprising: a speaker changeover switch for enabling a user to listen to the reproduction signal by an output from a speaker; a sound quality switching unit provided in the signal processing circuit; and an operation input for switching the sound quality switching unit. A sound quality changeover switch; and control means for controlling an output state of the reproduction signal by operating inputs of the speaker changeover switch and the sound quality changeover switch. Regardless of the state of the sound quality switching means, the sound quality switching means is set to a predetermined sound quality. Disk reproducing apparatus characterized by being configured to set the state