JPH02260295A - Recording medium playing device - Google Patents

Abstract

PURPOSE:To easily confirm an alarm sound or a caution sound and to generate an optional sound by preparing a mixing means for mixing an audio signal from an audio signal reproducing means and an audio signal from a sound generator and controlling the sound generator by a control means in accordance with the contents of an operation command. CONSTITUTION:The recording medium playing device is provided with the control means 5, 7 for controlling the audio signal reproducing means 1 to 4 in an operation mode corresponding to the contents of an operation command, the sound generator 14 for generating an audio signal and mixing means 15L, 15R for mixing the audio signals from the means 1 to 4 and the audio signal from the sound generator 14. The control means 5, 7 control the sound generator 14 in accordance with the contents of the operation command. Thereby, an alarm sound or a caution sound is included in the outputted audio signal together with the playing sound of a disk 2. Consequently, the alarm sound or the caution sound can be easily confirmed and an optional sound can be generated.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a recording medium playing device such as a video disc player.

BACKGROUND ART A video playback system is sometimes configured by externally connecting a microcomputer to a video disc player. In such a video playback system, a warning sound or caution sound is emitted as a warning against a user's operational error or to urge caution during operation. This sound is usually a so-called beep sound produced by a buzzer built into a microcomputer. However, since the user operates the video disc player, if the video disc player and the microcomputer are installed apart from each other, the beep sound cannot be heard, which is inconvenient. In addition, beep sounds have a narrow frequency band and cannot be freely changed in tone quality or timbre, resulting in a monotonous sound.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a recording medium playing device that allows a user to easily check warning sounds and caution sounds, and also allows the user to generate arbitrary sounds.

The recording medium performance device of the present invention is a recording medium performance device having an audio signal reproduction means for reading an information signal recorded on a recording medium and demodulating an audio signal from the information signal, and is characterized by: a control means for controlling the audio signal reproduction means to an operation mode according to the operation mode; a sound generator for generating an audio signal; and a mixing means for mixing the audio signal from the audio signal reproduction means and the audio signal from the sound generator. , the control means controls the sound generator according to the contents of the operation command.

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

FIG. 1 shows an optical video disc player as an embodiment of the present invention. In this player, a disk 2 is rotationally driven by a spindle motor 1, and a recorded signal thereof is read by an optical pickup 3. The pickup 3 is carried by a carriage (not shown) that is moved in the radial direction of the disk 2 by a carriage motor 4, and the information reading point (information reading light spot) of the pickup 3 is freely positioned in the radial direction of the disk 2. Ru. Further, various servo systems such as a spindle servo system, a focus servo system, a tracking servo system, and a carriage servo system are provided, but they are not shown because they are already well known.

The spindle motor 1 and the carriage motor 4 are connected to a spindle servo system, a carriage servo system, or a performance section control circuit 5.
Driven by. The performance section control circuit 5 is configured to drive the spindle motor 1 and the carriage motor 4 and perform on/off control of the various servo systems (not shown) in response to commands from the system controller 7.

RF multiplied signal video FM which is the read output of pickup 3
and a low-pass filter (LPF) 8 for analog audio FM signals. The video FM signal that has passed through the video FM BPF 6 is supplied to a video demodulation circuit 10, where it is demodulated to become a reproduced video signal. The passing signal of LPF8 is BPFllL for passing only audio carrier wave components of 2.3MHz2 and 2.8MHz.

The analog audio FM signal is separated into left and right channel analog audio FM signals at 11R, and each analog audio signal is demodulated by FM demodulation circuits 12L and 12R to become left and right channel audio signals.

The system controller 7 is, for example, a microprocessor, an input/output interface, and a ROM.

It is composed of a microcomputer consisting of a RAM, a timer, etc., and performs arithmetic operations based on data or programs stored in the ROM and RAM in response to commands supplied from the operation section 9 in response to key operations, and then returns to the performance section. Command signals for operation modes such as play, search, and jump are supplied to the control circuit 5.

The system controller 7 has a sound generator 14
is connected. The sound generator 14 includes, for example, an oscillator that generates low-frequency oscillation signals with a plurality of different waveforms, a plurality of frequency dividers that divide the oscillation signal, a mixer that mixes each oscillation signal, an equalizer that changes the frequency characteristics of the oscillation signal, and an equalizer that changes the frequency characteristics of the oscillation signal. It is composed of amplifiers for signal level adjustment, etc., and the type of these oscillation signals, frequency division ratio, mixer mixing ratio, equalizer frequency characteristics, and amplifier gain are controlled by the system controller 7.

The audio signal as an oscillation signal output from the sound generator 14 is sent to an adder 15L as a mixing means;
15R, and is added to the left and right channel audio signals from the FM demodulation circuits 12L and 12R, and each output audio signal of the adders 15L and 15R becomes the reproduced audio signal of this player.

Further, the system controller 7 is provided with a terminal (not shown) to which an external microcomputer can be connected so as to form a video reproduction system.

In the video disk player according to the present invention, the microprocessor in the system controller 7 constantly monitors key operations, for example, by interrupt processing, and determines whether or not a key operation has been performed, as shown in FIG. Step 31).

If it is determined that a key has been operated, it is determined whether the operated key is a valid key for issuing a command in the current operating mode (step 32). For example, since valid keys for each operating mode are written in the ROM in advance, this is determined by whether or not the operated key is written in the storage area of the ROM for the corresponding operating mode. If the key operation is not valid, an alarm sound generation command is issued to the sound generator 14 to generate an alarm sound (step 33).

On the other hand, in the case of a valid key operation, an acceptance sound generation command is issued to the sound generator 14 to generate an acceptance sound (step 34), and a code indicating the operation key is stored in a built-in buffer memory (not shown). etc. (step 35).

In addition, in the processing for the key operation input, the microprocessor reads operation command data corresponding to the code indicating the operation key stored in the buffer memory from the ROM (step 41), as shown in FIG. In accordance with the data, an operation mode command signal including data such as performance position and search position is generated and supplied to the performance section control circuit 5 (step 42). Performance section control circuit 5
In response to command signals from the system controller 7, the spindle motor 1 and the carriage motor 4 are driven, each servo system is controlled on and off, etc. to obtain a desired operating mode. When the performance section control circuit 5 completes the operation based on the command signal, it generates an operation end signal indicating that the operation has ended and supplies it to the system controller 7, so the microprocessor generates the operation end signal after supplying the command signal. If the operation end signal is supplied, an operation end sound generation command is issued to the sound generator 14 to generate an operation end sound (step 44).

In the sound generator 14, different types of oscillation signals, frequency division ratios, mixer mixing ratios, equalizer frequency characteristics, or amplifier gains are set depending on the above-mentioned alarm sound generation command, reception sound generation command, or operation end sound generation command. Establish. For example, for an alarm sound generation command, a sine wave oscillation signal is used and the frequency division ratio is set to a first predetermined value to increase the frequency of the oscillation signal, and for an acceptance sound generation command, a triangular wave oscillation signal is used. to lower the frequency of the oscillation signal by setting the frequency division ratio to a second predetermined value, and in response to the operation end sound generation command, oscillation is performed by using a square wave oscillation signal and setting the frequency division ratio to the first predetermined value. Increase the frequency of the signal. The oscillation signal from the sound generator 14 is outputted from the player via adders 15L and 15R, amplified by an amplifier (not shown), and outputted from a speaker as an alarm sound, recipient sound, or operation completion sound.

In the above-mentioned embodiment, an alarm sound, an acceptor, and an operation end sound are generated, but the operation method and operation status are not limited to this, and it is also possible to announce the operation method and operation status with a synthesized voice using a sound generator. You can also. Also,
The sound generator may generate multiple channels of audio signals.

Further, in the embodiment described above, the sound generator 14 having an oscillator that generates a low frequency oscillation signal is provided, but the RF multiplied signal, which is the read output of the pickup 3, is obtained by detecting only a predetermined band with a filter. By dividing the signal, it can also be used as a low frequency oscillation signal.

Furthermore, the present invention is applicable not only to the above-mentioned video disc player, but also to recording media performance devices such as video tape recorders and CD players.

Effects of the Invention As described above, the recording medium performance device of the present invention includes a sound generator that generates an audio signal to be used as a warning sound or caution sound to the user, and reads an information signal recorded on the recording medium. The audio signal from the audio signal reproducing means for demodulating the audio signal from the information signal and the audio signal from the sound generator are mixed and output. Therefore, since the audio signal output from the recording medium performance device includes the sound of the recording medium as well as the warning sound and caution sound, it is easy for the user to confirm the warning sound and caution sound by using the speaker to which the audio signal is supplied. It can be done. In addition, the control means that controls the audio signal reproduction means to an operation mode according to the operation command contents controls the sound generator according to the operation command contents, so that the control means controls the sound generator according to the operation command contents. Warning sounds and caution sounds can be generated at appropriate timing. Furthermore, since the sound quality and timbre can be freely changed by using a sound generator, it is advantageous to be able to generate various sounds when forming a video playback system, for example, when using it as a game device.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIGS. 2 and 3 are flow diagrams showing the operation of the system controller in the player of FIG. Explanation of symbols of main parts 1...Spindle motor 3...Pickup 7...System controller 14...Sound generator 15L, 15R...Adder Applicant Pioneer Corporation

Claims (3)

[Claims] (1) A recording medium playing device having an audio signal reproducing means for reading an information signal recorded on a recording medium and demodulating an audio signal from the information signal, the recording medium playing device reproducing the audio signal in an operation mode according to the contents of an operation command. a sound generator for generating an audio signal; and a mixing means for mixing an audio signal from the audio signal reproduction means and an audio signal from the sound generator, the control means controlling the sound generator. A recording medium performance device characterized in that a generator is controlled according to the content of the operation command. (2) The recording medium performance device according to claim 1, wherein the control means controls the generation timing, frequency, and timbre of the audio signal of the sound generator. (3) The recording medium performance device according to claim 1, wherein the sound generator extracts a predetermined frequency component from the information signal and generates an output signal based on this.