JPH06261387A - Method and device for reproducing acoustic sound - Google Patents

Abstract

PURPOSE:To automatically change to the adjusted acoustic characteristic by reading TOC information of a recording medium, storing it with the acoustic characteristic selected by a listener in a storage means, and reproducing the recording medium according to the storage contents. CONSTITUTION:A system microcomputer 1 is provided with a RAM storing the TOC (Table of Contents) information, the order of piece of music, and the acoustic characteristic. A listener directly controls a panel control section 2 which sets and changes the acoustic characteristic. It is provided with a microcomputer 3 controlling DSP(digital signal processor) or the like. It reads the TOC information of a CD source and it is stored in the RAM in a system microcomputer 1 with the acoustic characteristic selected by the listner, and the CD source is reproduced based on the acoustic characteristic stored in the RAM. Thus, the acoustic sound is reproduced based on the acoustic characteristic stored with the TOC information and when the CD source or the piece of music is changed, the acoustic characteristic is automatically adjusted by the listner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound reproducing method and device using a sound equalizing device or the like.

[0002]

2. Description of the Related Art FIG. 6 is a system block diagram of an audio equalizer used in a conventional audio reproducing apparatus. In the figure, 2 is a panel operation section, 9 is a CD player, 10 is a power amplifier section, 11 is a speaker, 14 is a tape player, 15 is a tuner, 16 is a source selector,
Reference numeral 17 is a graphic equalizer filter unit, and 18 is a graphic equalizer control unit.

The sound equalizer in the conventional sound reproducing device is constructed as described above, and the CD player 9, tape player 14,
One of the tuners 15 is selected via the source selector 16. Next, when the graphic equalizer characteristic is changed in the panel operation unit 2, the graphic equalizer control unit 18 controls the graphic equalizer filter unit 17, and the controlled signal is amplified by the power amplifier unit 10 and output through the speaker 11. Is converted to.

[0004]

Since the conventional sound equalizing device in the sound reproducing device is constructed as described above, when the CD source is changed or the music is changed,
I had to readjust the acoustic characteristics to my liking.

The present invention has been made in order to solve such a problem, and it is a Table of CD source of
It is an object of the present invention to obtain a sound reproduction method and apparatus in which content (hereinafter simply referred to as TOC) information is read to automatically change the sound characteristics adjusted to one's own taste.

[0006]

A sound reproducing method according to the present invention reads TOC information of a recording medium, stores the TOC information in a storage unit together with acoustic characteristics selected by a listener, and reproduces the recording medium according to the stored content. It is something that is done.

In the sound reproducing device according to the present invention, the TOC information of the CD is stored in the storage means together with the sound characteristics selected by the sound characteristic selecting means whose characteristics can be freely selected, and the CD source is stored based on the contents stored in the storage means. Is to be played.

[0008]

According to the present invention, the sound is reproduced based on the sound characteristics stored together with the TOC information.
The acoustic characteristics are automatically adjusted to the listener's preference when the D source or song changes.

[0009]

EXAMPLES Example 1. Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a system microcomputer that manages the entire apparatus.
A RAM is provided for storing song numbers and acoustic characteristics.
Reference numeral 2 denotes a panel operation unit, which is directly operated by a listener to set and change acoustic characteristics (graphic equalizer characteristics, fader, balance, volume, etc.). 3 is a DSP control microcomputer, 4 is a DSP control microcomputer ROM, and 5 is a DS
P (digital signal processing device, hereinafter simply referred to as DSP),
6 is an S-RAM, 7 is a D / A converter, 8 is a digital interface, 9 is a CD player, 10 is a power amplifier section, and 11 is a speaker.

With the above-described structure, if the player selects to reproduce the CD on the panel operation unit 2,
The system microcomputer 1 operates the CD player 9 to reproduce the CD source. The signal obtained by reproducing the CD source is sent to the digital interface 8, where the TOC information of the CD is the system microcomputer 1.
Sent to. In step S1 of FIG. 2, the TOC information is read by the system microcomputer 1 from the R in the system microcomputer 1.
If it is stored in AM, search it. If it is stored, T
Following the OC information, the acoustic characteristic information that has already been stored is called in step S2, and in step S6, the contents are written to the DSP control microcomputer 3 and the DSP.
Send to ROM4 for control microcomputer, DSP5 and S-RA
The M6 is controlled, the signal is processed, converted into an analog signal by the D / A converter 7, amplified by the power amplifier 10, and converted into sound by the speaker 11.

Further, in the RAM in the system microcomputer 1,
If the TOC information of the CD source being reproduced is not stored, in step S3, the information of the acoustic characteristics designated by the listener on the panel operation unit 2 is read. Step S6
Leading to. In step S6, the contents are transmitted to the DSP control microcomputer 3 and the DSP control microcomputer ROM 4. After that, the operation is the same as when the acoustic characteristics are stored.

Further, at this time, when the listener presses the acoustic characteristic storage button on the panel operation unit 2, the system microcomputer 1
Becomes the acoustic characteristic storage mode, and in step S5,
The TOC information of the CD source being reproduced is stored at the beginning, and then the contents of the acoustic characteristics designated by the panel operation unit 2 are stored in the RAM in the system microcomputer. Here, if the power supply of the system microcomputer 1 is set to the backup system of the audio device, the stored contents are retained within a certain time even if the power outlet is disconnected.

FIG. 3 is a block diagram showing an example of a signal processing unit for acoustic characteristics in the DSP 5. In FIG. 3, reference numeral 12 is a filter unit controlled by the DSP control microcomputer 3 and includes filter elements 12a to 12d, and 13 is a DS.
The electronic volume is controlled by the P control microcomputer 3. In the filter unit 12, the filter elements 12a to 12d in each channel create a frequency characteristic in accordance with the frequency level instructed by the panel operation unit 2. Also,
In the electronic volume 13, the volume level is adjusted according to the volume level volume on the panel operation section for each channel.

FIG. 4 shows the filter element 1 of the filter section 12.
It is an example of 2a-12d. In FIG. 4, Z ⁻¹ is a delay element, a0 to a4 are multipliers, and A is an adder. One filter can be made with this one circuit. Actually, this circuit is provided for each channel by the number of elements of the graphic equalizer.

[0015]

[Table 1]

Table 1 shows the TO recorded on the CD source.
It is a table which shows the content of C information. The TOC information includes the type of the CD source (for music, for ROM, etc.). For music, the first song number, last song number, total recording time,
The start time of each song is recorded. Here, in order for a CD source having the same contents as the TOC information of a certain CD source to exist, the total recording time, the total number of recorded songs, and the playing time of each song in the recorded song order must be the same. Except for the same title of the same artist, the possibility of having CD sources with the same TOC information can be ignored.

[0017]

As described above, according to the present invention, if the listener once memorizes the acoustic characteristics, when the same CD source is reproduced, the listener does not have to readjust the acoustic characteristics each time. There is an effect that it is possible to obtain acoustic characteristics according to the taste of the.

[Brief description of drawings]

FIG. 1 Example 1. 2 is a system block diagram of FIG.

FIG. 2 Example 1. 2 is a flowchart of the microcomputer.

FIG. 3 shows Example 1. It is a block diagram of a signal processing unit of the acoustic characteristics of.

FIG. 4 Example 1. 5 is a signal flow diagram of a filter unit in the signal processing unit for the acoustic characteristic of FIG.

FIG. 5 is a system block diagram of a conventional audio device.

[Explanation of symbols]

 1 System Microcomputer 2 Panel Operation Unit 3 DSP Control Microcomputer 4 DSP Control Microcomputer ROM 5 DSP 6 S-RAM 7 D / A Converter 8 Digital Interface 9 CD Player 10 Power Amplifier 11 Speaker 12 Filter Section 13 Electronic Volume 14 Tape Player 15 Tuner 16 Source selector 17 Graphic equalizer filter section 18 Graphic equalizer control section

Claims (2)

[Claims] 1. The TOC information of a recording medium is read and stored in a storage means together with the acoustic characteristics selected by a listener, and the recording medium is reproduced based on the acoustic characteristics stored in the storage means. Characteristic sound reproduction method. 2. An acoustic characteristic selecting means capable of freely selecting a characteristic, and a storage means for storing the TOC information of the CD together with the acoustic characteristic selected by the acoustic characteristic selecting means,
A sound reproducing device characterized in that a CD source is reproduced based on the stored contents of the storage means.