JPH06282938A - Disk device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a disk device that can perform the same sound quality control as previously set automatically in the next reproduction by performing sound quality control once at the time of reproduction. [Structure] During reproduction of MD1, when an instruction for sound quality adjustment is given from a sound quality adjustment operation section 19, the microcomputer 7
The instruction content is converted into a character as a DSP control symbol, an identifier ";;" indicating the presence or absence thereof is added, and the instruction content is stored in the UTOC together with the track name. At the time of reproduction, this DSP control symbol is read from the UTOC together with the track name, and the output level of each frequency band stored in the ROM 18 is output to the DSP 15 from the DSP control symbol. The DSP 15 outputs sound at the output level of each frequency band and controls the sound quality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recordable / reproducible disc device using a magneto-optical disc or the like capable of automatically controlling the sound quality during reproduction.

[0002]

2. Description of the Related Art In order to give a user-desired sound quality to a music signal reproduced from a CD or MD, it is necessary to set the user sound quality in the reproduction mode.

For example, three types of sound quality control are possible as sound quality control: DSL for bass beat control, BBE for controlling middle- and high-pitched sound quality, and DSP-EQ for controlling sound quality according to music genre. In some cases, the sound quality control according to the user's preference is performed as shown below.

Here, A and B indicate different discs (for example, CD). The adjustable (set) range is (OFF,
1, 2 ... MAX).

DSL BBE DSP-EQ A first song on the CD A pop uptempo song "MAX" "MAX" "POPS" A second song on the CD Slow ballad song "1" "3" "POPS" 1st song of B's CD, instrumental song of jazz "3" "OFF" "JAZZ" 2nd song of B's CD, female vocal of jazz "OFF" "2" "JAZZ"

[0006]

In this way, even if the image of a song changes even if the CD of a different genre or the CD of the same genre is changed, if it is desired to perform sound quality control, the CD is set again each time it is played back. . CD
It is very troublesome to set the sound quality control every time you listen to music from.

Therefore, an object of the present invention is to provide a disc device which can automatically and repeatedly reuse the once set sound quality control contents to reduce the sound quality setting work.

[0008]

According to the present invention, management information for managing recorded audio data for each recording unit is stored in a recording medium, and audio data is reproduced based on the management information. In the recordable / reproducible disk device, the sound quality management information for controlling the sound quality at the time of reproducing the audio data can be stored in the recording medium as a part of the management information. , A disk device adapted to reproduce the audio data based on the sound quality management information.

[0009]

According to the present invention, as shown in FIG. 1, when the sound quality adjusting operation section 19 is instructed to adjust the sound quality at the time of reproduction, the instruction content is converted into the sound quality control symbol by the microcomputer 7 and the digital filter. Is DSP1
5 (Digital Signal Processor), and output this DS
The sound quality of voice is controlled by P15. When the reproduction is completed, the sound quality adjustment parameter of the sound quality control symbol is converted into a signal and automatically recorded in the recording medium 1 as the sound quality management information.

At the time of reproduction, the sound quality control information is read by the microcomputer 7, and the sound quality control symbol is displayed on the DSP in the same manner as the user manually instructed.
Then, the sound quality of the reproduced sound is automatically controlled by the DSP 15.

An identifier is used to manage audio data in recording units, and a sound quality management information presence / absence identifier and sound quality management information are stored as one set in a recording medium. The presence / absence of sound quality management information is determined by the presence / absence of the sound quality management information identifier,
Only when there is an identifier, the sound quality control information is converted into a sound quality control symbol to control the sound quality.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a mini disk device showing an embodiment of a recording / reproducing disk device according to the present invention.
First, an outline of the entire processing of recording / reproducing will be described with reference to FIG.

As shown in FIG. 1, at the time of recording on the MD 1, the voice input from the outside is converted from an analog signal into a 16-bit digital signal by the A / D converter 13, and then the data compression encoder 10 is used. The data is compressed by. This data compressed voice is RAM
After being temporarily stored in the (Random Access Memory) 9, it is read by the memory controller 8 controlled by the microcomputer 7 and recorded on the MD 1 by using the recording magnetic head 16 driven by the head drive unit 17. A laser beam, which will be described later, is also used during data recording.

When the recording is completed, the recorded voice is handled as one track, and the track name is input by the key 12, and the UTOC (User Table Of Contents) of MD1 is input.
In ts), the start address, end address and track name of the track are written as voice management information.

On the other hand, during reproduction of the MD 1, the optical pickup 3 is driven by the feed motor 5 controlled by the servo control circuit 6 and moves to a predetermined position. Then, the MD1 is irradiated with laser light through the objective lens 2. The reflected light of the irradiated laser light at MD1 is converted into an electric signal by a photodetector (not shown) provided in the optical pickup 3 and amplified by the RF amplifier 4. Then, after the amplified reproduction signal is once stored in the RAM 9,
The data is read by the memory controller 8, decompressed by the data compression decoder 10 and converted into an analog signal by the D / A converter 14. This analog signal is DSP
The sound quality is controlled by controlling at each output level of each frequency band designated by the (Digital Signal Processor) 15.

A spindle motor 20 is driven by the servo control circuit 6 and controls the rotation of the MD 1 during recording or reproduction.

According to the present invention, in addition to the well-known information (such as the above-mentioned track name) as voice management information, the reproduced sound quality can be reproduced in the sound quality according to the user's preference in the UTOC area provided in the MD1. It is designed so that information for doing so can be recorded. In order to distinguish between the well-known information and the sound quality control set information, a special and unique identifier is used for the sound quality control set information. In this example, a signal that is not normally used, for example, a double sign “;;” is used as an identifier. The identifier is recorded at the same time as a pair with the sound quality control set information (DSP control symbol).

Next, an example of software for realizing the above-described sound quality control reproduction processing will be described in detail with reference to the flowcharts shown in FIGS.

When a playback key (not shown) of the key 12 shown in FIG. 1 is pressed and a track number is designated, it corresponds to the designated track number in the audio management information recorded in the UTOC area of MD1. The start address, end address and track name of the recorded data to be recorded are read out and temporarily stored in the RAM 9 together with the track number (step 100).

The track names stored in the RAM 9 are sequentially read to determine whether or not there is a DSP control symbol presence / absence identifier ";;" (step 101).

If there is no DSP control symbol presence / absence identifier, the process goes to a process for discriminating the track name (step 106).

If there is a DSP control symbol presence / absence identifier, for example, the number after the DSP control symbol presence / absence identifier is 3
A DSP control symbol represented by a digit string is taken out (step 102). For example, FIG. 5A shows the case where the track name is "EMOTIONS" and the DSP control symbol is "901". In this step 102, the DSP control symbol "901" is extracted.

Next, the output level of each frequency band corresponding to the DSP control symbol is read from the ROM 18 in which the conversion table for converting the DSP control symbol to the output level of each frequency band is stored (step 10).
3).

FIG. 6 shows the contents of the 3-digit DSP control symbol. In the first digit, T for voice control of heavy bass
-BASS is stored with a value of 0 to 9 and "0" is off (O
FF), "1" is the minimum (Min), and "9" is the maximum (MA
X). The second digit is B for controlling the middle and high tones.
BE is stored as a value of 0 to 9 and "0" is off (OF
F), "1" is the minimum (Min), and "9" is the maximum (MA
X). In the third digit, DSP-EQ for controlling the sound quality for each music genre is stored as a value of 0 to 3, and is "0".
Is off (OFF), "1" is pops (POPS), "
2 ”is jazz (JAZZ),“ 3 ”is classical (CL
ASIC). For example, as shown in FIG.
If the SP control symbol is "901", T-BA
SS is "MAX", BBE is "OFF", DSP-EQ
Is "POPS", and the output level of each frequency band corresponding to these designations is read from the ROM 18.

Next, the designation of the output level of each frequency band extracted from the ROM 18 is output to the DSP 15 as a DSP control symbol (step 104). DSP1
In 5, the analog signal output from the D / A converter 14 is filtered to output sound at the output level of each frequency band to adjust the sound quality (step 105).

Next, it is determined whether or not there is a track name (step 106), and if there is, only the track name is displayed on the display 11 (step 107).

Next, the start address of the recording data is read from the RAM 9, the recording data is sequentially read from the start address by the optical pickup 3 as described above, and the voice is output from the DSP 15 (step 10).
8).

Next, it is judged whether or not the stop key for instructing the end of reproduction of the key 12 has been pressed (step 10).
9). If the stop key is not pressed, the following processing is performed.

First, in step 110, it is judged whether or not there is a designation to change the track number, and if there is a designation to change the track number, the UT corresponding to the track number.
Go to the OC read process (step 100).
If there is no designation to change the track number, it is determined whether there is a sound quality adjustment instruction from the sound quality adjustment operating section 19 (step 111). If there is an instruction to adjust the sound quality, ROM1 is read from the instructed T-BASS, BBE, and DSP-EQ values.
The output level of each frequency band stored in 8 is read and output to the DSP 15 as a DSP control symbol (step 112). The DSP 15 outputs sound at the output level of each designated frequency band and adjusts the sound quality (step 113). Next, the DSP control symbol stored in the ROM 18 is read from the instruction content of the sound quality adjustment instructed by the sound quality adjustment operation section 19 and the corresponding DSP control symbol is converted into characters (step 11).
4). For example, T-BASS is "MAX" and BBE is "O".
If FF "and DSP-EQ are" POPS ", the DSP control symbol is" 901. "Next, the DSP control symbol presence / absence identifier";;"is added (step 115). 5B, the track name is read from the RAM 9 (step 116), and the DSP control symbol with the DSP control symbol presence / absence identifier is added after the track name (step 117). ,
This is written in the RAM 9 (step 118). Then R
The track number being reproduced is read from the AM 9 (step 119), and the track number being reproduced is displayed on the display 11 (step 120). Next, the fact that the UTOC is changed by the sound quality adjustment is displayed on the display 11 (step 121).

When the stop key of the key 12 is pressed, it is determined whether the sound quality adjustment operating section 19 is operated (step 122). If it is operated, the UTOC is operated.
Track name, DSP control symbol identifier, DSP
The control symbol is written in the UTOC of MD1 (step 123). Then, the display of the change of the UTOC by the voice adjustment on the display 11 is turned off (step 12).
4).

In this way, once the sound quality is adjusted, this information is recorded in the UTOC area, and at the time of reproduction, this sound quality control set information is read out together with known information, so that the sound quality is automatically adjusted based on this information.

[0033]

As described above, according to the present invention, when the sound quality is adjusted during reproduction, this information is left on the medium as sound quality management information at the end of reproduction, and the sound quality is adjusted based on this sound quality management information during the subsequent reproduction. It is very convenient because you don't have to adjust the sound quality every time you play it.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a mini disk device according to an embodiment.

FIG. 2 is a diagram (I) showing a reproduction flow.

FIG. 3 is a diagram (II) showing a reproduction flow.

FIG. 4 is a diagram (III) showing a reproduction flow.

FIG. 5 is a diagram showing a format of a track name in UTOC.

FIG. 6 is a diagram showing the contents of a DSP control symbol.

[Explanation of symbols]

 1 MD (Recording Medium) 7 Microcomputer 9 RAM 12 Keys 15 DSP 18 ROM 19 Sound Quality Adjustment Operation Section

Claims (2)

[Claims] 1. A recordable / reproducible disk device in which management information for managing recorded audio data for each recording unit is stored in a recording medium, and audio data is reproduced based on the management information. Sound quality management information for controlling sound quality during reproduction of the sound data can be stored in the recording medium as a part of the management information, and the sound data is reproduced based on the sound quality management information. A disk device characterized by being adapted to do so. 2. The disk apparatus according to claim 1, wherein a sound quality management information presence / absence identifier or the like is used to identify the presence or absence of the sound quality management information.