JP2003271197A - Music reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a music reproducing device capable of automatically adjusting sound volume in accordance with an environment where a user is and reproducing music while respectively and automatically changing the sound volume and sound quality of each music by storing the sound volume and sound quality. <P>SOLUTION: If the user uses an operation inputting part 4 to change sound volume and sound quality for reproduction in the case of reproducing a music track (each music), the change information at that time is recorded on a memory card 2 as reproducing sound volume and sound quality information for the music track. Therefore, the music track will be reproduced with the changed sound volume and sound quality when the music track is next reproduced. A sensor 5 detects a change in ambient noise, temperature and moisture during reproduction. A CPU 6 receives a signal from the sensor, determines optimum sound volume and sound quality which are set in advance and transmits to a DSP (digital signal processor) 10 a reproduction control signal corresponding to the set sound volume and sound quality. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a music reproducing device for reproducing music data recorded on a memory card or the like,
In particular, the present invention relates to a music reproducing device that can change the volume and sound quality of music data for each song.

[0002]

2. Description of the Related Art In recent years, a large number of portable music reproducing devices for reading and reproducing music data from a flash memory card or the like have been commercialized. Such a music reproducing device can record many songs on a memory card.
In the case of a memory card having a storage capacity of Mb, when data is compressed at a standard compression rate, 20 or more pieces of music can be recorded. It is considered that the number of recordable songs on one memory card will increase more and more as the capacity of the memory card increases.

As described above, when a large number of music data are recorded on one memory card, it is expected that songs with completely different genres will be recorded, and the user will be able to adjust the volume and sound quality for each genre and each song. You will listen to music while changing the settings according to your preference.

Therefore, conventionally, the music reproducing apparatus is provided with operation buttons for setting the volume (volume) and the sound quality (tone), and the music is controlled while setting the volume and the sound quality before or during the reproduction. I was listening to. Then, the once set volume and sound quality will be reproduced in the same state until the next adjustment.

[0005]

[Problems to be Solved by the Invention]

Therefore, the present invention provides a music reproducing apparatus capable of automatically adjusting the volume according to the environment in which the user exists, or storing the volume and sound quality of each song and automatically changing them. The purpose is to provide.

[0007]

In order to solve the above-mentioned problems, the present invention provides a music reproducing apparatus for reproducing music data from a storage medium, which comprises: a lead for reading the music data recorded in the storage medium; Reproduction means for reproducing music data, and reproduction control means for reproducing the music data at the added volume or sound quality when the reproduction control information indicating the volume or sound quality added to the music data is read from the recording medium. It is equipped with.

The present invention further comprises an operation input section for switching the volume or sound quality, and when the volume or sound quality is arbitrarily switched by the operation input section during reproduction of music data based on the reproduction control information, Recording means for recording the switched volume or sound quality as new reproduction control information on the recording medium is provided.

Further, according to the present invention, the music data has a plurality of music tracks, and the reproduction control information is recorded in the recording medium for each of the music tracks.

Further, according to the present invention, the reproduction control information is set with a plurality of volumes or sound qualities based on the reproduction time of the music track.

The present invention further comprises a sensor for detecting noise, temperature or humidity, and the reproduction control means switches the volume or sound quality based on the change in noise, temperature or humidity by the sensor.

The present invention further comprises a memory for reading the entire music data recorded in the storage medium, and the reproduction control means sets the volume based on the maximum volume and the minimum volume of the music data read in the memory. Alternatively, the sound quality is switched. Further, the present invention comprises identification means for identifying an individual, and the reproduction control means switches to a volume or sound quality corresponding to the individual identified by the identification means. Further, the present invention comprises a resistance detection unit that detects a resistance value of a cable of headphones or a speaker connected to the music reproduction device, and the reproduction control unit,
The volume or the sound quality is switched based on the resistance value of the cable detected by the resistance detecting means.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a memory card reproducing player showing an embodiment of a music reproducing apparatus according to the present invention.
The music reproducing device 1 shown in FIG. 1 is assumed to be a portable reproduction breaker that can be driven by a battery (not shown).
The memory card 2 is detachably connectable to a memory card slot installed in the housing of the portable music player. The memory card 2 has a non-volatile semiconductor memory element such as a NAND flash memory, and a plurality of music data downloaded from a compact disc (CD) or DVD or a network is recorded in the memory card 2. Is. Recording of music data is usually performed on a personal computer. That is, the memory card 2 is set in a personal computer, and the user downloads his or her favorite song from the recording source of various music data to the memory card, and enjoys the music by using the portable music reproducing device 1 at the destination. . Display 3
Is provided on the outer surface of the housing of the portable music reproducing device 1 and displays the title and order of the music data being reproduced, and displays the volume and sound quality. The operation input unit 4 is an operation unit that performs a reproduction operation of music data from the memory card 2, a switching operation of volume, sound quality, and the like. The sensor 5 is a detector that detects a surrounding state in which the user uses the portable music playback device 1, and is a noise sensor for detecting ambient noise, a temperature sensor for detecting ambient temperature and humidity. And a humidity sensor are included, and the detected ambient conditions are output to the music playback device. The CPU 6 is a control circuit that receives data input from the memory card 2, the operation input unit 4, and the sensor 5 described above and controls various controls. The RAM 7 is a memory as a work buffer for loading an application program for reproducing music data, developing sound quality data associated with each music data, and executing the program by the CPU. Decoder 8
Is for decoding the music data recorded in the memory card 2, and decompresses / decodes the music data recorded in the memory card 2 by compression encoding / encoding based on a predetermined compression method such as MP3 or AAC. To do. The D / A converter 9 converts the decoded digital music data into analog data for audio output, and outputs the analog data to the DSP. DS
A P (Digital Signal Processor) 10 controls the output level of each designated frequency band based on a DSP control signal instructed by the CPU 6 to control the output level of the analog voice signal input from the D / A converter 9 to improve the sound quality. Switch or adjust the volume. Headphone 11 is D
It is a speaker that outputs analog voice output adjusted by the SP as voice.

In the music reproducing apparatus of the present embodiment having the above-mentioned system configuration, the characteristic operation of the present embodiment will be described below.

The feature of the present embodiment is that the sound quality and volume can be finely adjusted as described below. That is,

(1) Playback information can be recorded in the memory card 2 for each music track (each song), and the playback volume and sound quality can be switched. For example, even when a plurality of songs are reproduced in order, the volume and sound quality are automatically adjusted without the user having to adjust them.

For example, even when music tracks having different volumes and sound qualities are mixedly recorded in the memory card 2, each music can be recorded without changing the sound data recorded in the memory card 2. It becomes possible to reproduce according to the volume and sound quality information of the reproduction information for each track.

(2) While playing a music track (each song),
When the user changes the reproduction volume and sound quality using the operation input unit, the change information at that time is recorded in the memory card 2 as the reproduction volume and sound quality information of the music track. Therefore, the volume and sound quality changed at the next reproduction are reproduced.

(3) When reproducing a music track, all music data for one track to be reproduced is loaded into the RAM 7, the maximum and minimum volumes of one track are judged, and the music track is reproduced at the optimum volume. To do.

(4) Music is reproduced by automatically switching the volume and sound quality of the music track to be reproduced according to the ambient sound (noise). For example, when the surrounding noise is noisy and the music is difficult to hear, the volume is automatically increased and played.
Also, in quiet places or on trains, the volume is automatically reduced so that sound is not leaked and others are disturbed.

(5) The music is reproduced while switching the sound quality or raising or lowering the volume according to the temperature and the humidity during the reproduction. By doing so, it is possible to enjoy that the volume sound quality changes depending on the ambient temperature and humidity, and also to feel the change of the surrounding environment while listening to music.

The operation characteristic of the present embodiment described above will be specifically described below.

FIG. 2 is a configuration diagram of music data recorded in the memory card 2. As shown in FIG. 2, in the present embodiment, the music content data (track 1 to track N) 12 and the reproduction control information 13 which is information in which the volume, sound quality, etc. of the music content data are set in the memory card 2. Are stored separately. Then, the music reproduction device reads the reproduction control information corresponding to each track and switches the volume and sound quality, so that the music data of each track can be reproduced at any volume and sound quality without conversion to the music content data itself. Can be played.

As shown in FIG. 3, the reproduction control information 13 corresponds to the track number 14 of each music track,
15 pieces of reproduction information are recorded. Furthermore, if two types of reproduction information are recorded in one music track according to the reproduction time, the volume and sound quality can be automatically switched even during reproduction of a certain music.

When the user changes the volume and sound quality by himself using the operation input unit 4 during music reproduction, this reproduction information is recorded as the reproduction information corresponding to the switched volume and sound quality. By doing so, the volume and sound quality based on the changed reproduction information can be reproduced at the next reproduction.

FIG. 3 shows the above (1) in this embodiment.
6 is a flowchart showing an operation regarding (2).

First, waiting for the memory card 2 or the music reproducing device 1 to be mounted (step S1), the memory card 2
When is installed, the CPU 6 recognizes the memory card 2,
The configuration of the data stored in the memory card 2 is detected. When the CPU 1 recognizes that the reproduction control information 13 is recorded together with the music content data 12 in the memory card 2 (step S2), the CPU 6 reads the reproduction control information 13 from the memory card 2 and loads it into the RAM 7. Further, the music track designated by the user is read by the operation input unit 4 (step S3).

The content data of the read music track is decoded by the decoder 8 via the CPU 1,
It is output as analog voice data by the D / A converter 9. If the reproduction control information corresponding to the music track read at this time exists, the CPU 1 causes the DSP to
10, a reproduction control signal is transmitted to set the volume and sound quality of each music track (step S4), and the DSP 10
Then, with respect to the analog audio output received from the D / A converter 9, the volume and sound quality are adjusted based on the reproduction control signal and output to the headphones 11 (step S5). During the reproduction, if the user arbitrarily switches the volume and sound quality using the operation input unit 4 (step S6), the DSP
In 10, the voice data is output with the switched volume and sound quality set. At this time, when the mode for updating and recording the reproduction control information 13 in the memory card 2 is set (step S7), the volume and sound quality switched by the user are set as the new reproduction control information 13 and the corresponding music track is set. The reproduction control information of (1) is updated and recorded (step S8). Then, when the reproduction to the end of the music track is completed, the reproduction of the next music track is continuously executed or the reproduction is completed (step S9).

Next, the operation flow of the above features (4) to (5) will be described with reference to FIG. First, it waits for the memory card 2 or the music reproducing device 1 to be attached (step S10). When the memory card 2 is attached, the CPU 6
Recognizes the memory card 2 and detects the structure of the data stored in the memory card 2. The CPU 1 stores the music content data 12 in the memory card 2 and the reproduction control information 1
When it is recognized that 3 is recorded (step S1
1), the CPU 6 reads the reproduction control information 13 from the memory card 2.
Is loaded and loaded into the RAM 7. Further, the music track designated by the user is read by the operation input unit 4 (step S12).

The content data of the read music track is decoded by the decoder 8 via the CPU 1,
It is output as analog voice data by the D / A converter 9. If the reproduction control information corresponding to the music track read at this time exists, the CPU 1 causes the DSP to
10, a reproduction control signal is transmitted to set the volume and sound quality of each track (step S13), and the DSP 10
Then, the volume and sound quality of the analog audio output received from the D / A converter 9 is adjusted based on the reproduction control signal and output to the headphones 11 (step S14).

Then, during reproduction, the sensor 5 causes noise in the surroundings,
Detecting changes in temperature and humidity (step S1)
5), the sensor 5 sends a sense signal to that effect to the CPU 6. The CPU 6 receives the sense signal and determines the preset optimum volume and sound quality (step S1).
6), The reproduction control signal corresponding to the volume and sound quality set in the DSP 10 is transmitted. Then, the DSP 10 switches the volume and sound quality of the music track based on the reproduction control signal, and outputs the sound. Then, when the reproduction to the end of the music track is completed, the reproduction of the next music track is continuously executed or the reproduction is ended (step S17).

Further, in the above feature (3), one music track is loaded into the RAM 4, the CPU 6 detects the maximum volume and the minimum volume of the entire song, and determines the optimum volume and sound quality. Based on the above, by outputting a reproduction control signal to the DSP 10, the volume and the sound quality are switched.

As described above, various situations are conceivable for finely switching the volume and the sound quality in addition to the above-mentioned use situation. For example, it is possible to individually recognize a plurality of users and switch the volume and sound quality according to each individual.
In this case, the fingerprint of the user who is using the music playback device uses the user ID input, voice recognition, etc., and plays back music by setting the volume and sound quality of each user's preference registered in advance. Is.

Also, the resistance value of the speaker or headphone cable connected to the music reproducing device 1 is measured, and if the resistance value is large, the sound output from the speaker becomes small, so it is set to a large value, and the resistance value is small. In this case, the volume can be set low before the music is played.

Further, in the present embodiment, the music reproducing apparatus has been described as an example. However, when the present embodiment is applied to, for example, a video reproducing apparatus, reproduction volume, screen size, tracking, image correction at the time of video reproduction. It is also possible to replay while switching each scene for each scene. According to this, some of the plurality of stereo broadcast programs recorded on the VTR are not stereo, and when there is a program desired to be heard in monaural sound, it is necessary to switch to monaural sound each time the user plays it. No, it can be switched automatically.

When the present embodiment is applied to a mobile phone, for example, the other party of the call is determined and the registered volume and sound quality are set according to the other party of the call. By registering the volume and sound quality from the characteristics of the voice in advance for each caller,
The volume and sound quality can be set automatically when a call is received. Also, by setting the volume according to the volume of the voice of the other party, it becomes easier to have a telephone conversation.

As described above, according to the present embodiment, the volume and sound quality can be finely switched according to various situations, so that the user needs to change the volume and sound quality using the operation input section each time. Disappear.

[0039]

According to the present invention, since the volume and the sound quality can be finely switched according to various situations, the user does not have to change the volume and the sound quality by using the operation input section each time.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a music reproducing device according to an embodiment of the present invention.

FIG. 2 is an exemplary view showing music content data and reproduction control data recorded in the memory card according to the first embodiment.

FIG. 3 is an exemplary view showing a structure of reproduction control data according to the first embodiment.

FIG. 4 is a flowchart for explaining an operation of switching between volume and sound quality in the same embodiment.

FIG. 5 is a flowchart for explaining an operation of switching between volume and sound quality in the same embodiment.

[Explanation of symbols]

1 ... Music playback device, 2 ... Memory card, 3 ... Display, 4 ... Operation input unit, 5 ... Sensor, 6 ... CPU, 7 ... R
AM, 8 ... Decoder, 9 ... D / A converter, 10 ... D
SP, 11 ... Headphones.

Claims (8)

[Claims] 1. A music reproducing device for reproducing music data from a storage medium, means for reading music data recorded in the storage medium, reproduction means for reproducing the music data, and the music data from the recording medium. And reproduction control means for reproducing the music data at a volume or sound quality based on the reproduction control information when the reproduction control information indicating the sound volume or sound quality of the music data added independently is read out. Music playback device characterized by. 2. An operation input unit for switching volume or sound quality, wherein when the volume or sound quality is arbitrarily switched by the operation input unit during reproduction of music data based on the reproduction control information, it is switched. The music reproducing apparatus according to claim 1, further comprising a recording unit that records the volume or the sound quality as new reproduction control information on the recording medium. 3. The music reproducing apparatus according to claim 1, wherein the music data has a plurality of music tracks, and the reproduction control information is recorded in the recording medium for each of the music tracks. 4. The music reproducing apparatus according to claim 3, wherein the reproduction control information has a plurality of volumes or sound qualities set based on the reproduction time of the music track. 5. A sensor for detecting noise, temperature or humidity is provided, and the reproduction control means switches volume or sound quality based on a change in noise, temperature or humidity by the sensor. The described music playback device. 6. A memory for reading the entire music data recorded in the storage medium is provided, and the reproduction control means determines the volume or sound quality based on the maximum volume and the minimum volume of the music data read in the memory. The music reproducing device according to claim 1, wherein the music reproducing device is switched. 7. The music reproduction according to claim 1, further comprising identification means for identifying an individual, wherein the reproduction control means switches to a volume or a sound quality corresponding to the individual identified by the identification means. apparatus. 8. A resistance detecting unit for detecting a resistance value of a cable of headphones or a speaker connected to the music reproducing device, wherein the reproduction control unit is a resistance value of the cable detected by the resistance detecting unit. 2. The music reproducing device according to claim 1, wherein the volume or the sound quality is switched based on the.