JP2004079112A - Sound recording and reproducing method and sound recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To instantaneously reproduce a desired piece of music without being affected by the fluctuation in the sound recording level. <P>SOLUTION: A sound recording and reproducing device 1 is provided with a sound recording level recording means 5 for detecting the sound recording level for each piece of music every time sound data are recorded on a recording medium 3 and recording the detected sound recording level on the recording medium 3 corresponding to the sound data of a music piece unit, and an output level correction value calculation means 7 and an output level controller 8 for acquiring the sound recording level corresponding to the piece of the music to be reproduced from the recording medium 3 and adjusting the output level of the sound data of the music to be reproduced on the basis of the acquired sound recording level as if the music to be reproduced were recorded at a standard sound recording level at the time of the reproduction for outputting the sound data read from the recording medium 3 to the outside. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a recording / reproducing method and a recording / reproducing apparatus for digitally recording an audio signal on a recording medium such as a memory or a hard disk and reproducing the recorded audio signal.
[0002]
[Prior art]
2. Description of the Related Art In recent years, recording / reproducing apparatuses capable of digitally recording an audio signal on a recording medium such as a memory or a hard disk and reproducing the recorded audio signal have become widespread.
[0003]
[Problems to be solved by the invention]
The recording capacity of the recording / reproducing apparatus as described above increases with an increase in the capacity of the recording medium, and the number of recordable songs is also increasing. However, when the number of recordable songs increases, the possibility of recording songs from various recording sources increases, so that the recording level of the songs varies, and as a result, the playback volume varies greatly depending on the songs. Was.
For example, since the recording level of one CD (compact disk) is set to be substantially constant, when recording music from one CD, the recording level does not vary greatly. However, when a tune is recorded from a plurality of CDs, there is a possibility that the reproduction volume at the time of reproduction by the recording / reproducing apparatus is largely different due to a difference in recording level for each CD.
There are recording / reproducing devices that can adjust the recording level during recording, but adjusting the recording level for each song is a very complicated task for the user. Further, if the recording level is adjusted in digital recording, there is a possibility that the sound quality is degraded. On the other hand, if the volume is adjusted manually during reproduction, the difference in recording level can be absorbed, but adjusting the reproduction volume for each song is a very complicated operation for the user as in recording.
As a method for solving the above-described problem of the variation in the recording level, a reproducing method has been proposed in which a recording medium is reproduced at a high speed, an average value of the recording levels is detected, and the reproduction volume is adjusted based on the detected level. (JP-A-5-128731). However, in this reproducing method, it is necessary to detect the average value of the recording level before reproducing the music, so that there is a problem that it takes time until the music is actually reproduced.
[0004]
The present invention has been made in order to solve the above problems, and has as its object to provide a recording / reproducing method and a recording / reproducing apparatus capable of absorbing variations in recording levels and immediately reproducing a desired song. I do.
[0005]
[Means for Solving the Problems]
The recording / reproducing method of the present invention detects the recording level for each of the series of audio data when a series of audio data is recorded on a recording medium, and detects the detected recording level as a target of the recording level detection. A recording level recording procedure for recording on the recording medium in association with audio data, and a reproducing level for outputting the audio data read from the recording medium to an external device, and a recording level corresponding to a series of audio data to be reproduced on the recording medium. And an output level control procedure for adjusting the output level of the series of audio data to be reproduced based on the acquired recording level and the standard recording level. Thereby, the output level of the audio data of the music to be reproduced is adjusted as if the audio data was recorded at the standard recording level at the time of recording. Here, the series of audio data means a group of audio data that is a unit of recording or reproduction, such as a song.
Further, the recording / reproducing method of the present invention detects a recording level for each of the series of audio data when a series of audio data is recorded on a recording medium, and detects the detected recording level as a target of the recording level detection. A recording level recording procedure for recording on the recording medium in association with a series of audio data, and a series of audio to be reproduced during reproduction for outputting audio data read from the recording medium to an externally volume controllable amplifier device. A recording level corresponding to data is acquired from the recording medium, and a volume control procedure for controlling the volume of the amplifier device based on the acquired recording level and the standard recording level is executed. Thus, the volume of the amplifier device is adjusted as if the audio data of the music to be reproduced was recorded at the standard recording level at the time of recording.
In one configuration example of the recording / reproducing method of the present invention, a predetermined value set in advance is used as the standard recording level.
In one configuration example of the recording / reproducing method of the present invention, the standard recording level is determined based on a plurality of recording levels corresponding to a plurality of series of audio data to be reproduced.
[0006]
Further, the recording / reproducing apparatus of the present invention comprises a recording medium capable of recording and reproducing audio data, and a recording level for detecting a recording level for each of the series of audio data when a series of audio data is recorded on the recording medium. Detecting means, recording level recording means for recording the detected recording level on the recording medium in association with the series of audio data targeted for recording level detection, and outputting the audio data read from the recording medium to the outside. At the time of reproduction to be output, recording level acquisition means for acquiring from the recording medium a recording level corresponding to a series of audio data to be reproduced, and the series of audio to be reproduced based on the acquired recording level and the standard recording level. Output level control means for adjusting the output level of the data.
Further, the recording / reproducing apparatus of the present invention comprises a recording medium capable of recording and reproducing audio data, and a recording level for detecting a recording level for each of the series of audio data when a series of audio data is recorded on the recording medium. Detecting means, recording level recording means for recording the detected recording level on the recording medium in association with the series of audio data subjected to recording level detection, and an amplifier device capable of externally controlling the volume. At the time of reproduction for outputting the audio data read from the recording medium, recording level acquisition means for acquiring from the recording medium a recording level corresponding to a series of audio data to be reproduced, based on the acquired recording level and the standard recording level. Volume control means for controlling the volume of the amplifier device.
In one configuration example of the recording / reproducing apparatus according to the present invention, the output level control means or the volume control means sets a predetermined value set in advance as the standard recording level.
In one configuration example of the recording / reproducing apparatus of the present invention, the output level control means or the volume control means sets the standard recording level based on a plurality of recording levels corresponding to a plurality of series of audio data to be reproduced. To decide.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
[First Embodiment]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a recording / reproducing apparatus according to a first embodiment of the present invention. The recording / reproducing apparatus 1 of the present embodiment includes a CD drive device 2, a recording medium 3 such as a hard disk or a memory capable of recording and reproducing audio data, and an audio data recording means 4 for recording audio data on the recording medium 3. A recording level recording unit 5 for detecting a recording level for each song when audio data is recorded on the recording medium 3 and recording the detected recording level on the recording medium 3 in association with the audio data for each song; A reproducing means 6 for occasionally reading audio data from the recording medium 3 and an output level correction value calculation for obtaining a recording level corresponding to the music to be reproduced from the recording medium 3 and calculating an output level correction value based on the obtained recording level. Means 7, an output level controller 8 for adjusting the output level of the audio data based on the calculated output level correction value, and a user instructing the recording / reproducing apparatus 1. Having an input unit 9, a display unit 10 for presenting information to a user, a network interface unit (NI) 11 for connecting to the Internet, and a control unit 12 for controlling the entire recording and reproducing apparatus. The output level correction value calculation means 7 and the output level controller 8 constitute output level control means for adjusting the output level of audio data to be output to the outside.
[0008]
The recording operation of the recording / reproducing apparatus 1 shown in FIG. 1 will be described below. FIG. 2 is a flowchart showing the operation of the recording / reproducing apparatus 1 during recording. First, the user inserts a CD into the CD drive device 2 and requests the user to operate the input means 9 to record the CD on the recording medium 3. The control unit 12 controls the audio data recording unit 4 in response to a user request, and the audio data recording unit 4 reads audio data for each song from a CD inserted in the CD drive device 2 and records the audio data on the recording medium 3. (Step S1 in FIG. 2).
[0009]
When audio data is recorded in step S1, the recording level recording means 5 calculates a maximum recording level LPE which is a maximum value of the recording level and an average recording level LAV which is an average value of the recording levels for each audio data for each music piece. To detect. Then, the recording level recording means 5 records the recording level data indicating the detected maximum recording level LPE and the average recording level LAV on the recording medium 3 in association with the audio data of each music piece for which the recording level is detected. (Step S2).
Until the recording of the music specified by the user (all the music on the CD or a part thereof) is completed (YES in step S3), the processing in steps S1 and S2 described above is performed for each music.
[0010]
Next, the audio data recording means 4 records the attribute information of the music on the recording medium 3 in association with the audio data of the music recorded in step S1 (step S4). The attribute information of a song includes song information (song name), artist information (artist name), album information (album name), and genre information (genre name).
The attribute information of the music can be obtained by the control means 12 accessing a music CD database server on the Internet via the network interface means 11 when a CD is inserted into the CD drive device 2. The control unit 12 passes the attribute information obtained from the music CD database server to the audio data recording unit 4, and the audio data recording unit 4 records the received attribute information on the recording medium 3 in association with the audio data in music units. The user may operate the input unit 9 to input attribute information of the music.
[0011]
Next, the operation of the recording / playback apparatus 1 during playback will be described. FIG. 3 is a flowchart showing the operation of the recording / playback apparatus 1 during playback. First, the user operates the input means 9 of the recording / playback apparatus 1 to select a playback target group composed of a plurality of songs, and requests playback of the playback target group (step S11 in FIG. 3).
The reproduction target groups include songs belonging to the same album, songs played by the same artist, songs belonging to the same genre, songs belonging to a playlist specified by the user, and the like. The user operates the input means 9 to directly designate a desired song to create a playlist, or designate a desired album, artist or genre.
When the user designates an album, an artist or a genre, the control means 12 refers to the attribute information of the music recorded on the recording medium 3 through the reproduction means 6 and determines the music title corresponding to the album, the artist or the genre specified by the user. It is displayed on the display means 10. The user selects all the music displayed on the display means 10 or a part thereof by the input means 9. The control means 12 stores the music selected by the user as a reproduction target group. When the user creates a playlist, the control unit 12 stores the songs in the playlist created by the user as a reproduction target group.
[0012]
Next, the control unit 12 notifies the output level correction value calculation unit 7 of the reproduction target group selected in step S11. The output level correction value calculation means 7 acquires the recording level data (the maximum recording level LPE and the average recording level LAV) of each song belonging to the reproduction target group notified from the control means 12 from the recording medium 3, and acquires the acquired recording level. The standard recording level LREF of the reproduction target group is determined based on the data (step S12).
The following method can be considered as a method for determining the standard recording level LREF.
(A) The maximum value among the average recording levels LAV of the songs belonging to the reproduction target group is set as the standard recording level LREF.
(B) The minimum value among the average recording levels LAV of the songs belonging to the reproduction target group is set as the standard recording level LREF.
(C) The average value of the average recording levels LAV of the songs belonging to the reproduction target group is set as the standard recording level LREF.
Note that instead of determining the standard recording level from the recording level obtained from the recording medium 3, the following may be performed.
(D) Regardless of the playback target group, a value unique to the recording and playback device 1 is set as the standard recording level LREF.
[0013]
The output level correction value calculation means 7 determines the standard recording level LREF by any one of the predetermined methods (A) to (D). According to any one of the methods (A) to (C), the standard recording level LREF is determined based on the average recording level LAV of each song belonging to the reproduction target group. The possibility that the output level correction becomes excessively large or small as compared with the case where a value unique to the device 1 is used is reduced, and the volume of each song belonging to the reproduction target group can be adjusted more appropriately. .
[0014]
Next, among the recording level data acquired in step S12, the average recording level of the song m belonging to the reproduction target group is set to LAVm, and the maximum recording level of the song m is set to LPEM.
The control means 12 instructs the output level correction value calculation means 7 to perform the output level correction value calculation processing for the music m belonging to the reproduction target group. The output level correction value calculation means 7 calculates an average recording level correction value CAVm for correcting the average recording level LAVm of the music m and a maximum recording level correction value CPEM for correcting the maximum recording level LPem of the music m in accordance with a command from the control means 12. Is calculated by the following equation (step S13).
CAVm = LREF / LAVm (1)
CPEm = LMAX / LPEm (2)
In Expression (2), LMAX is the maximum value of the recording level that the recording / reproducing apparatus 1 can take.
[0015]
Subsequently, the output level correction value calculation means 7 compares the calculated average recording level correction value CAVm with the maximum recording level correction value CPEm (step S14), and the average recording level correction value CAVm is equal to or less than the maximum recording level correction value CPEm. In the case of, the average recording level correction value CAVm is set to the output level correction value COLm of the song m (step S15). If the average recording level correction value CAVm is larger than the maximum recording level correction value CPEm, the maximum recording level correction value CPEm is set to the song m. Is set as the output level correction value COLm (step S16).
The smaller of the average recording level correction value CAVm and the maximum recording level correction value CPEm is adopted as the output level correction value COLm of the song m, because the audio data and the output level volume value of the song m are used as described later. This is to prevent the result of the multiplication from being saturated beyond the maximum value that can be output from the recording and reproducing apparatus 1 when multiplying by.
[0016]
Next, the control means 12 instructs the reproduction means 6 to reproduce the music m, and the reproduction means 6 reads the audio data of the music m from the recording medium 3 according to the instruction of the control means 12 (step S17).
The output level controller 8 has an output level volume (not shown) for adjusting the output level of the audio data output from the reproducing means 6. The output level controller 8 sets the value Vm of the output level volume at the time of reproducing the music m as shown in the following equation, and multiplies the audio data of the music m read by the reproducing means 6 with the output level volume value Vm, The result of the multiplication is output to the outside as audio data of the music m whose level has been corrected (step S18).
Vm = VREF × COLm (3)
In the equation (3), VREF is a reference volume value of the output level volume.
The audio data of the music piece m output from the recording / reproducing apparatus 1 is amplified by an AV amplifier or the like (not shown) and output from a speaker, or recorded on a recording medium by another recording device (not shown).
[0017]
Next, the user can manually operate the output level volume during the reproduction of the song m. When the user operates the output level volume during the reproduction of the music piece m (YES in step S19), the output level controller 8 changes the stored reference volume value VREF according to the following equation (step S20). In the subsequent processing of step S18, the changed reference volume value VREF is used.
VREF = Vu / COLm (4)
In Expression (4), Vu is the value of the output level volume set by the user.
[0018]
Until the reproduction of the music m is completed (YES in step S21), the processing of steps S18 to S20 is repeated. After the reproduction of the music m is completed, the control means 12 determines whether or not all the music in the reproduction target group has been reproduced (step S22). If not all the music has been reproduced, the process returns to step S13 to reproduce the next music. I do. In this way, the processes of steps S13 to S22 are performed for each music piece from the beginning to the end of the reproduction target group.
After playing all the songs in the playback target group, the control means 12 instructs the output level controller 8 to return the output level volume value Vm to the reference volume value VREF (step S23).
[0019]
As described above, in the present embodiment, since the value of the output level volume is adjusted as if each of the songs belonging to the playback target group were recorded at the standard recording level, it is possible to absorb variations in the recording level, The music can be reproduced at a substantially constant level or recorded on another medium.
In addition, since the recording level is detected when recording the audio data and recorded on the recording medium 3 together with the audio data, there is no need to perform processing such as high-speed reproduction of the audio data to detect the recording level during reproduction. The desired music can be reproduced immediately without spending time on the previous processing.
[0020]
[Second embodiment]
FIG. 4 is a block diagram showing a configuration of a recording / reproducing system according to a second embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals. The recording / reproducing system according to the present embodiment includes a recording / reproducing apparatus 1a having a function of acquiring a status from an amplifier apparatus and a volume control function for the amplifier apparatus, an amplifier apparatus 21 capable of externally controlling the volume, and an amplifier apparatus 21. And a speaker 31 to be driven.
[0021]
The recording / reproducing device 1a includes a CD drive device 2, a recording medium 3, an audio data recording unit 4, a recording level recording unit 5, a reproducing unit 6, and a recording level corresponding to a music to be reproduced from the recording medium 3. It controls the volume correction value calculating means 7a for obtaining and calculating the volume correction value based on the obtained recording level, the input means 9, the display means 10, the network interface means 11, and the entire recording / reproducing apparatus. It has control means 12a for controlling the volume of the amplifier device 21 based on the volume correction value thus obtained, and communication interface means 13 for performing bidirectional communication with the amplifier device 21.
[0022]
The amplifier device 21 includes an input selector 22 that selects a desired audio input from a plurality of sound sources, a D / A converter 23 that converts audio data output from the input selector 22 into an analog audio signal, A volume 24 for adjusting the level of the analog audio signal output from the converter 23, a power amplifier 25 for amplifying the analog audio signal output from the volume 24, and a communication interface for performing bidirectional communication with the recording / reproducing apparatus 1a It has means 26, storage means 27, and control means 28 for controlling the entire amplifier device. As a communication protocol between the communication interface means 13 and 26, for example, there is RS-232C. In FIG. 4, the audio data output from the recording / reproducing apparatus 1a is a digital signal, but may be an analog signal. When the audio data output is an analog signal, the D / A converter 23 becomes unnecessary.
[0023]
The recording operation of the recording / reproducing apparatus 1a is the same as that of the first embodiment. Next, the operation of the recording / playback apparatus 1a during playback will be described. FIG. 5 is a flowchart showing the operation of the recording / reproducing apparatus 1a during reproduction. The processing in step S31 in FIG. 5 is the same as that in step S11 in FIG.
The control unit 12a notifies the volume correction value calculation unit 7a of the reproduction target group selected in step S31. The volume correction value calculation means 7a determines the standard recording level LREF of the reproduction target group (step S32). The method of determining the standard recording level LREF is the same as step S12 in FIG.
Next, the volume correction value calculation means 7a calculates an average recording level correction value CAVm and a maximum recording level correction value CPEm for the song m belonging to the reproduction target group (step S33). The calculation method at this time is the same as step S13 in FIG.
Subsequently, the volume correction value calculating means 7a compares the calculated average recording level correction value CAVm with the maximum recording level correction value CPEm (step S34), and the average recording level correction value CAVm is equal to or less than the maximum recording level correction value CPEm. In this case, the average recording level correction value CAVm is set to the volume correction value CVOm of the song m (step S35). If the average recording level correction value CAVm is larger than the maximum recording level correction value CPEm, the maximum recording level correction value CPEm is set to the volume of the song m. The correction value is CVOm (step S36).
The smaller of the average recording level correction value CAVm and the maximum recording level correction value CPEm is adopted as the volume correction value CVOm of the song m because the maximum volume output when the volume value is the reference volume value VAREF is determined. This is to prevent the sound that exceeds the sound from being output by the automatic volume control.
For example, when a song having a low average recording level and a high maximum recording level is reproduced, the average recording level correction value CAVm can be expected to be large. At this time, if the average recording level correction value CAVm is used as it is as the volume correction value, the volume will be greatly increased, and a large volume will be generated at the peak portion of the music. This loud volume is a loud volume that cannot be output (cannot be output) when the volume value is the reference volume value VAREF, and becomes a loud volume unexpected by the user.
Therefore, if the smaller of the average recording level correction value CAVm and the maximum recording level correction value CPEm is set as the volume correction value CVOm, even in such a case, the maximum value that can be output when the volume value is the reference volume value VAREF. It does not generate sounds that exceed the volume. For this reason, it is possible to prevent a situation in which the automatic volume control generates a loud volume unexpected by the user.
[0024]
Next, the control means 12a instructs the reproduction means 6 to reproduce the music m, and the reproduction means 6 reads out the audio data of the music m from the recording medium 3 according to the instruction of the control means 12a and outputs it to the amplifier device 21. (Step S37).
Next, the control unit 12a periodically transmits a status acquisition command to the amplifier device 21 via the communication interface unit 13, and checks the state of the amplifier device 21. FIG. 6A is a diagram showing a format of a control command sent from the recording / reproducing device 1a, and FIG. 6B is a diagram showing a format of a message sent from the amplifier device 21 in response to the status acquisition command.
[0025]
The control command sent from the recording / reproducing apparatus 1a includes, for example, a 1-byte STX delimiter 101 indicating the start of the control command, a command field 102, an option field 103, and a 1-byte ETX delimiter 104 indicating the end of the control command. It is composed of
When the value stored in the command field 102 is, for example, “1”, the control command is a status acquisition command for acquiring the status of the amplifier device 21. For example, when the value is “2”, the volume setting for setting the volume value of the amplifier device 21 is performed. Command.
The option field 103 stores a command argument. For example, in the case of a volume setting command, a volume value set from the recording / reproducing apparatus 1a to the amplifier apparatus 21 is stored.
[0026]
The message sent from the amplifier device 21 includes an STX delimiter 201 indicating the start of the message, a model ID field 202, a volume field 203, an input selector field 204, and an ETX delimiter 205 indicating the end of the message. .
The model ID field 202 stores a model ID for determining the model of the amplifier device 21. The current value of the volume 24 of the amplifier device 21 is stored in the volume field 203. The input code indicating the current state of the input selector 22 of the amplifier device 21 is stored in the input selector field 204.
[0027]
In the recording medium 3 of the recording / reproducing apparatus 1a, an input code table 301 as shown in FIG. 7 in which input codes common to all models of the amplifier device 21 and input terminals of the respective models are associated is stored in advance. On the other hand, the storage means 27 of the amplifier device 21 previously stores an input code table 302 as shown in FIG. 8 in which the input codes are associated with the input terminals of the own device. In the example of FIG. 8, as an example of the input code table 302, the table 302 of the amplifier device 21 with the model ID “1” is shown.
The correspondence between the input code and the input terminal of the amplifier device 21 is determined for each model. For example, in the amplifier device 21 with the model ID “1” or “2”, the input code “0” is set to “CD” by the input selector 22. Indicates that the input terminal is selected. Similarly, in the amplifier device 21 of the model ID “1”, the input code “6” indicates that the input selector 22 has selected the “V-AUX” input terminal.
[0028]
The control means 12a of the recording / reproducing apparatus 1a instructs the reproducing means 6 to reproduce the music m and, at the same time, transmits a status acquisition command to the amplifier apparatus 21 via the communication interface means 13.
Upon receiving the status acquisition command via the communication interface unit 26, the control unit 28 of the amplifier device 21 returns a message in which the input code is stored in the input selector field 204 to the recording / reproducing apparatus 1a via the communication interface unit 26. The control means 28 determines the input code corresponding to the input terminal selected by the input selector 22 based on the input code table 302 of the storage means 27.
[0029]
The control unit 12a of the recording / reproducing apparatus 1a acquires the model ID from the model ID field 202 of the message received via the communication interface unit 13. Thus, the model ID of the amplifier device 21 to be controlled, which is currently connected to the recording / reproducing device 1a, can be obtained.
Then, the control unit 12a acquires the input code from the input selector field 204 of the received message, and confirms whether the input selector 22 of the amplifier device 21 has selected its own device (recording / reproducing device 1a) (step S38). .
[0030]
7 and 8, there is no input code corresponding to the recording / reproducing device. For example, if the audio output of the recording / reproducing device 1a is connected to the “V-AUX” input terminal of the amplifier device 21 having the model ID “1” Then, the user may register “V-AUX” in the control unit 12a as an input terminal for the recording / reproducing device 1a.
Thus, when the control unit 12a acquires the model ID and the input code from the received message, if the input terminal corresponding to the model ID and the input code is “V-AUX” on the input code table 301, the amplifier 12a The input selector 22 of the device 21 determines that the own device is selected, and if the corresponding input terminal is not “V-AUX”, it can be determined that the input selector 22 has not selected the own device. .
[0031]
When the input selector 22 has selected the recording / reproducing device 1a, the control means 12a performs a volume value setting process on the amplifier device 21 (step S39). In the volume value setting process, the control unit 12a calculates the value VAm of the volume 24 of the amplifier device 21 as in the following equation.
VAm = VAREF × CVOm (5)
In the equation (5), VAREF is a reference volume value of the volume 24.
Subsequently, the control unit 12a stores the calculated volume value VAm in the option field 103 of the volume setting command, and transmits the volume setting command to the amplifier device 21 via the communication interface unit 13.
The control unit 28 of the amplifier device 21 that has received the volume setting command via the communication interface unit 26 acquires the volume value VAm from the option field 103 of the volume setting command, and sets the value of the volume 24 to VAm. Thus, the volume value setting process ends.
The audio data of the music m output from the recording / reproducing apparatus 1a passes through the input selector 22, is converted into an analog audio signal by the D / A converter 23, passes through the volume 24, is amplified by the power amplifier 25, and is sent to the speaker 31. Is output.
[0032]
Next, the user can manually operate the volume 24 of the amplifier device 21 during the reproduction of the music m. The control means 12a of the recording / reproducing apparatus 1a periodically transmits the above-mentioned status acquisition command to the amplifier apparatus 21. In response to the status acquisition command, the control means 28 of the amplifier device 21 returns a message in which the current value VAu of the volume 24 is stored in the volume field 203 to the recording / reproducing device 1a.
The control means 12a of the recording / reproducing apparatus 1a receives the message sent from the amplifier 21, and acquires the volume value VAu from the volume field 203 of the message. Then, the control unit 12a updates the stored reference volume value VAREF with the obtained volume value VAu according to the following equation. In the subsequent processing of step S39, the updated reference volume value VAREF is used.
VAREF = VAu / CVOm (6)
Thus, if the user manually operates the volume 24 during the reproduction of the music m (YES in step S40), the volume value VAu changes, so that the reference volume value VAREF is changed (step S41).
[0033]
Until the reproduction of the music m is completed (YES in step S42), the processing of steps S38 to S41 is repeated. After the reproduction of the song m, the control unit 12a determines whether all the songs in the reproduction target group have been reproduced (step S43). If not all the songs have been reproduced, the process returns to step S33 to reproduce the next song. I do. In this way, the processes of steps S33 to S43 are performed for each music piece from the beginning to the end of the reproduction target group.
After playing all the songs in the playback target group, the control unit 12a stores the reference volume value VAREF in the option field 103 of the volume setting command, and transmits this volume setting command to the amplifier device 21. The control means 28 of the amplifier device 21 acquires the reference volume value VAREF from the option field 103 of the received volume setting command, and sets the value of the volume 24 to VAREF (step S44).
[0034]
When the user operates the input selector 22 during the reproduction of the music, the input code in the message periodically transmitted from the amplifier device 21 changes. When the control means 12a of the recording / reproducing apparatus 1a determines that the input selector 22 of the amplifier apparatus 21 has not selected its own apparatus based on the input code in the received message (NO in step S38), the volume value of step S39 Do not execute the setting process.
However, the reproduction process (steps S33 to S38, S40 to S44) of the recording / reproducing device 1a except for step S39 is continued unless the user separately instructs to stop reproduction. When the user operates the input selector 22 of the amplifier device 21 to select the recording / reproducing device 1a, the volume value setting process in step S39 is restarted.
Further, even when the input selector 22 of the amplifier device 21 has not selected the recording / reproducing device 1a, if the user operates the volume 24, the processes of steps S40 and S41 are performed. Therefore, if the user operates the volume 24 when the input selector 22 has not selected the recording / reproducing apparatus 1a, the reference volume value VAREF is changed as described above. Is used.
[0035]
As described above, in the present embodiment, the value of the volume 24 is adjusted as if each of the songs belonging to the reproduction target group were recorded at the standard recording level. A song can be played at a certain level. Also, as in the first embodiment, the desired music can be immediately reproduced without taking much time for the processing before reproduction.
In addition, it is desirable in terms of sound quality that the volume adjustment is performed at the final output stage. In the present embodiment, the volume 24 of the amplifier device 21 is controlled from the recording / reproducing apparatus 1a without adjusting the volume in the recording / reproducing apparatus 1a. , So that the sound volume can be adjusted in an optimal manner in terms of sound quality.
[0036]
In the first and second embodiments, if the recording level data of the music belonging to the reproduction target group is not recorded for some reason, the control means 12, 12a performs the processing before starting the processing of steps S12, S32. Then, the recording level recording means 5 scans the audio data on which no recording level data is recorded at a high speed, detects the maximum recording level LPE and the average recording level LAV, and records the detected recording level data in association with the audio data. It is recorded on the medium 3.
In the first and second embodiments, the reproduction target group is composed of a plurality of music pieces. However, when there is only one music piece belonging to the reproduction target group, it has been described in step S12 (D). As described above, a value unique to the recording / reproducing apparatuses 1 and 1a may be set as the standard recording level LREF.
In the first and second embodiments, the average recording level mechanically calculated is used. However, since the average recording level may not match the audible average level, a normal mode may be used. Apart from this, a mode for correcting the average recording level may be provided to set the average level of the audibility of each song, and this average level may be used instead of the average recording level.
[0037]
【The invention's effect】
According to the present invention, when audio data is recorded on a recording medium, a recording level is detected for each series of audio data, and the detected recording level is associated with a series of audio data targeted for recording level detection. A recording level recording procedure for recording on a recording medium, and at the time of reproduction for outputting the audio data read from the recording medium to the outside, a recording level corresponding to a series of audio data to be reproduced is obtained from the recording medium, and the obtained recording level and And performing an output level control procedure of adjusting the output level of a series of audio data to be reproduced based on the standard recording level, so that the series of audio data (song) to be reproduced is recorded at the standard recording level. Since the output level of the audio data is adjusted, the variation in the recording level can be absorbed, and a series of audio data can be played back at an almost constant level. Or it can be recorded on the medium. Also, since the recording level is detected at the time of recording the audio data and is recorded on the recording medium together with the audio data, there is no need to perform processing such as high-speed reproduction of the audio data to detect the recording level at the time of reproduction. The desired series of audio data can be immediately reproduced without spending much time in the processing of.
[0038]
Also, when audio data is recorded on the recording medium, the recording level is detected for each series of audio data, and the detected recording level is recorded on the recording medium in association with the series of audio data for which the recording level was detected. A recording level recording procedure to be performed, and a recording level corresponding to a series of audio data to be reproduced is obtained from a recording medium at the time of reproduction in which audio data read from a recording medium is output to an amplifier device capable of volume control from outside. By executing a volume control procedure for controlling the volume of the amplifier device based on the recorded recording level and the standard recording level, the volume of the amplifier device is adjusted as if a series of audio data to be reproduced was recorded at the standard recording level. Control allows you to absorb variations in recording levels and play back a series of audio data at an almost constant level Door can be. Also, since the recording level is detected at the time of recording the audio data and is recorded on the recording medium together with the audio data, there is no need to perform processing such as high-speed reproduction of the audio data to detect the recording level at the time of reproduction. The desired series of audio data can be immediately reproduced without spending much time in the processing of. Further, since the volume of the amplifier device is controlled without adjusting the volume in the recording / reproducing device, the volume can be adjusted by a method which is optimal in sound quality.
[0039]
In addition, by determining the standard recording level based on a plurality of recording levels corresponding to a plurality of audio data to be reproduced, a fixed value irrelevant to the series of audio data to be reproduced is used as a standard recording level. In comparison, the output level of the audio data or the volume of the amplifier device can be more appropriately adjusted.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a recording / reproducing apparatus according to a first embodiment of the present invention.
FIG. 2 is a flowchart showing an operation of the recording / reproducing apparatus of FIG. 1 during recording.
FIG. 3 is a flowchart showing an operation at the time of reproduction of the recording / reproduction device of FIG. 1;
FIG. 4 is a block diagram illustrating a configuration of a recording / playback system according to a second embodiment of the present invention.
FIG. 5 is a flowchart showing an operation at the time of reproduction of the recording / reproducing apparatus of FIG. 4;
FIG. 6 is a diagram showing a format of a control command sent from a recording / reproducing device and a format of a message sent from an amplifier device according to the second embodiment of the present invention.
7 is a diagram showing an example of an input code table of the recording / reproducing device of FIG.
FIG. 8 is a diagram illustrating an example of an input code table of the amplifier device of FIG. 4;
[Explanation of symbols]
Reference numerals 1, 1a: recording / reproducing device, 2: CD drive device, 3: recording medium, 4: audio data recording means, 5, recording level recording means, 6, reproducing means, 7: output level correction value calculating means, 7a: volume Correction value calculation means, 8 output level controller, 9 input means, 10 display means, 11 network interface means, 12, 12a, 28 control means, 13, 26 communication interface means, 21 amplifier device, 22 ... input selector, 23 ... D / A converter, 24 ... volume, 25 ... power amplifier, 27 ... storage means.

Claims (8)

When a series of audio data is recorded on a recording medium, a recording level is detected for each of the series of audio data, and the detected recording level is associated with the series of audio data targeted for recording level detection and the recording is performed. A recording level recording procedure for recording on a medium,
At the time of reproduction for outputting the audio data read from the recording medium to the outside, a recording level corresponding to a series of audio data to be reproduced is obtained from the recording medium, and the reproduction is performed based on the obtained recording level and the standard recording level. An output level control procedure for adjusting an output level of a series of target audio data. When a series of audio data is recorded on a recording medium, a recording level is detected for each of the series of audio data, and the detected recording level is associated with the series of audio data targeted for recording level detection and the recording is performed. A recording level recording procedure for recording on a medium,
At the time of reproduction for outputting audio data read from the recording medium to an amplifier device capable of volume control from the outside, a recording level corresponding to a series of audio data to be reproduced is obtained from the recording medium, and the obtained recording level and standard are obtained. A volume control procedure for controlling a volume of the amplifier device based on a recording level. The recording / reproducing method according to claim 1 or 2,
A recording / reproducing method, wherein a predetermined value set in advance is used as the standard recording level. The recording / reproducing method according to claim 1 or 2,
A recording / reproducing method, wherein the standard recording level is determined based on a plurality of recording levels corresponding to a plurality of series of audio data to be reproduced. A recording medium capable of recording and reproducing audio data,
Recording level detection means for detecting a recording level for each of the series of audio data when the series of audio data is recorded on the recording medium;
Recording level recording means for recording the detected recording level on the recording medium in association with the series of audio data that was the target of recording level detection,
At the time of reproduction for outputting the audio data read from the recording medium to the outside, a recording level acquisition unit for acquiring a recording level corresponding to a series of audio data to be reproduced from the recording medium,
An output level control unit for adjusting an output level of the series of audio data to be reproduced based on the obtained recording level and the standard recording level. A recording medium capable of recording and reproducing audio data,
Recording level detection means for detecting a recording level for each of the series of audio data when the series of audio data is recorded on the recording medium;
Recording level recording means for recording the detected recording level on the recording medium in association with the series of audio data that was the target of recording level detection,
At the time of reproduction for outputting audio data read from the recording medium to an amplifier device capable of volume control from the outside, a recording level acquisition unit for acquiring from the recording medium a recording level corresponding to a series of audio data to be reproduced,
A recording / reproducing apparatus, comprising: volume control means for controlling the volume of the amplifier device based on the acquired recording level and the standard recording level. The recording / reproducing apparatus according to claim 5 or 6,
The recording / reproducing apparatus, wherein the output level control means or the volume control means sets a predetermined value set in advance as the standard recording level. The recording / reproducing apparatus according to claim 5 or 6,
The recording / reproducing apparatus, wherein the output level control means or the volume control means determines the standard recording level based on a plurality of recording levels corresponding to a plurality of series of audio data to be reproduced.

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