JP2002109824A - Method for recording digital audio signal and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital audio signal recording device in which, at the time of audio reproduction of individual pieces of music recorded on a recording medium, the volume of the individual pieces of music becomes constant without performing volume adjustment and sounds are reproduced even when there is variations in the volume of a plurality of pieces of music which are digitized. SOLUTION: This digital audio signal recording device is constituted of: a volume information detecting means 3 for obtaining volume information from the reproduced signals of a plurality of selected pieces of music; a volume information preserving means 4 for preserving the volume information; a dubbing volume deciding means 5 which decides the volume to constitute a reference at the time of recording individual pieces of music on a recording medium on the basis of the preserved volume information and calculates the volume of the individual pieces of music on the basis of the volume to constitute the reference; a volume adjusting means 6 for adjusting the volume of reproduced signals of the individual pieces of music on the basis of the calculated volume; and a recording signal generating means 7 for generating adjusted signals for recording being in conformity with the specification of a recording medium from the adjusted reproduced signals. The volume adjusting means 6 adjusts the volume of the individual pieces of music so that the volume at the time of reproduction of the individual pieces of music become constant to conduct dubbing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital audio signal recording method and apparatus for recording a digital audio signal reproduced from a first recording medium or the like on a second recording medium.

[0002]

2. Description of the Related Art Conventionally, a recording / reproducing apparatus having at least two systems of reproducing means and at least one system of recording means, such as a cassette recorder having a CD (compact disk) reproducing function, has been supplied to the market. In addition, recording devices for recording digital signals (music, etc.) on mini disks, semiconductor cards, and the like have come to be marketed. These are C
The digital audio signal recorded in D or the like is recorded on a recording medium which is convenient for carrying, and is reproduced in a portable reproducing machine or an automobile so that music and the like can be enjoyed. In such a case, a so-called dubbing function, in which a digital signal such as music is reproduced by one reproduction system and the reproduced signal is recorded by another recording system, is useful.

[0003] However, when dubbing a favorite song from among songs recorded on a plurality of recording media to another recording medium, there is a possibility that there is a large variation in the recording volume between the songs, so that If the music is recorded on the recording medium at the volume, when the music dubbed on the recording medium is played back one after another, there may be a problem that the volume suddenly increases when the music changes.

Therefore, when dubbing a favorite song from among the songs recorded on a plurality of recording media to another recording medium, the dubbing volume of each song is adjusted so that each song has a similar volume. I had to make adjustments.

Recently, a service of downloading a digital audio signal from a network such as the Internet to a recording medium such as a semiconductor card via a personal computer or the like has come to be implemented. Since these digital audio signals are compression-encoded for convenience in transmission and recording, the digital audio signals can be downloaded in a short time, and more music can be dubbed on the same recording medium.

A method and apparatus for dubbing a compression-coded digital audio signal is disclosed in, for example, Japanese Patent Laid-Open No. 4-2.
There is a recording / reproducing apparatus described in Japanese Patent No. 58834. This recording / reproducing apparatus performs high-speed recording by recording compressed data (compressed and coded digital audio signal) on a recording medium as it is, without performing data decompression processing and performing data decompression processing at the time of dubbing. Real dubbing process.

However, in the configuration of the recording / reproducing apparatus described in the publication, compressed data is recorded as it is on a recording medium at the time of dubbing. Therefore, even if there is a large variation in the volume difference between songs, Since the music is duly recorded on the recording medium at the same volume, if the music dubbed on the recording medium is played back one after another, there is a problem that the volume suddenly becomes large or small every time the music changes. In particular, when playing music downloaded from various sites over the network via a network, songs of various volumes are mixed, select songs from each site and download them, and dub them directly to the hard disk etc. When this is done, the problem of variations in volume becomes significant.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. Even if there are variations in the volume of a plurality of digitally converted voices, volume information is obtained from each voice. The sound volume at the time of recording each sound on the recording medium is determined based on the sound volume information, and the sound volume of each sound is adjusted and recorded on the recording medium according to the determined sound volume, thereby recording on the recording medium. It is an object of the present invention to provide a method and apparatus for recording a digital audio signal that is played back with the volume of each sound being constant without adjusting the volume when the sound is reproduced. Also,
By determining the dubbing order when recording each audio on the recording medium based on the volume information, by recording each audio on the recording medium according to the determined dubbing order, it was recorded on the recording medium It is an object of the present invention to provide a method and apparatus for recording a digital audio signal in which the volume of sound is gradually changed when the sounds are reproduced in the recording order, and the sound can be reproduced without disturbing the listener.

[0009]

Means for Solving the Problems Claim 1 of the present invention
The recording method of the digital audio signal described is such that, when a plurality of digitalized audio signals are arbitrarily selected and recorded on a recording medium, each audio is reproduced and volume information is detected from each reproduced signal. Or obtaining volume information by performing an operation on each reproduction signal to obtain volume information, storing the volume information, and recording each sound on the recording medium based on the stored volume information. Determine the reference volume of, and calculate the volume at the time of recording each sound on the recording medium based on the reference volume, respectively,
Each sound is reproduced again, the volume of each reproduction signal is adjusted in accordance with the calculated volume, and an adjusted recording signal conforming to the standard of the recording medium is generated and recorded on the recording medium, whereby the recording is performed. It is characterized in that the sound volume of each sound recorded on the medium during sound reproduction is constant.

According to a second aspect of the present invention, in the digital audio signal recording method, when a plurality of digital audio signals are arbitrarily selected and recorded on a recording medium, first, any one of the audios is selected. Is reproduced, and the volume information is detected by detecting the volume information from the reproduced signal or by performing an operation on the reproduced signal to obtain the volume information, the volume information is obtained, the volume information is stored, and the stored volume information is stored. Determine the volume as a reference when recording other audio on the recording medium based on the, and generate an adjusted recording signal according to the standard of the recording medium from the reproduced signal and record it on the recording medium. Then, each of the other sounds is reproduced, and the volume information is detected from the other reproduction signals, or the volume information is obtained by performing an operation on the other reproduction signals. The volume information is obtained, and the volume at the time of recording the other audio on the recording medium is calculated based on the reference volume and the volume information of the other audio, and the volume of the other reproduction signal is calculated according to the calculated volume. Respectively, by generating an adjusted recording signal in accordance with the standard of the recording medium and recording it on the recording medium, to make the volume of the audio recorded on the recording medium constant during audio reproduction. Features.

According to a third aspect of the present invention, in the digital audio signal recording method, when a plurality of digitalized audio signals are arbitrarily selected and recorded on a recording medium, each audio is reproduced, and each audio is reproduced. Detecting the volume information from the signal, or obtaining the volume information by performing an operation on each reproduction signal to obtain the volume information respectively, obtain the volume information, save the volume information, and based on the stored volume information, The dubbing order of the sound to be recorded on the recording medium is determined so that the change in volume is gradual, and an adjusted recording signal that conforms to the standard of the recording medium is generated according to the determined dubbing order information and recorded on the recording medium. It is characterized by doing.

A digital audio signal recording method according to a fourth aspect of the present invention is the digital audio signal recording method according to any one of the first to third aspects, wherein the digital audio signal is reproduced. A decoding process and a data decompression process are performed when audio is compression-encoded.

According to a fifth aspect of the present invention, there is provided a digital audio signal recording method according to any one of the first to third aspects, wherein the digital audio signal is adjusted according to a standard of the recording medium. When generating the already-recorded recording signal, each reproduction signal is subjected to an encoding process and a compression encoding process, and the compression-coded digital audio signal is recorded on the recording medium.

According to a sixth aspect of the present invention, there is provided a digital audio signal recording method according to the fourth aspect, wherein the adjusted recording signal conforming to the standard of the recording medium is generated. Encoding and compression-encoding each reproduced signal, and recording the compression-encoded digital audio signal on the recording medium.

A digital audio signal recording method according to a seventh aspect of the present invention is the digital audio signal recording method according to any one of the first and second aspects, wherein each audio is recorded on the recording medium. When determining the reference volume for the sound, the maximum volume and the minimum volume of each voice are detected from the stored volume information, and the maximum volume of the maximum volume of each voice and the minimum volume of each voice are detected. A dynamic range is specified by using a minimum sound volume among the sound volumes, and the dynamic range is determined as a reference sound volume when each sound is recorded on the recording medium.

According to a eighth aspect of the present invention, there is provided the digital audio signal recording method according to the third aspect, wherein the dubbing order of the audio to be recorded on the recording medium is such that a change in volume is moderate. In determining to be, the maximum volume or the minimum volume of each voice is detected from the stored volume information, and the maximum volume or the minimum volume of each voice is recorded in the recording medium in ascending or descending order. In this case, the dubbing order is determined.

According to a ninth aspect of the present invention, there is provided a digital audio signal recording method according to the first or second aspect, wherein each audio is recorded on the recording medium. When deciding the reference volume for the sound, the average volume of each voice is detected from the stored volume information, and any one of the average volumes of each voice or each voice is detected. Is determined as a reference sound volume when each sound is recorded on the recording medium.

A digital audio signal recording method according to a tenth aspect of the present invention is the digital audio signal recording method according to any one of the first and second aspects, wherein each audio is recorded on the recording medium. When determining the reference sound volume, the average sound volume of each sound is detected from the stored sound volume information and adjusted so that the average sound volume of each sound falls within a predetermined value. The adjusted average volume of each voice is determined as a reference volume when each voice is recorded on the recording medium.

[0021] According to a eleventh aspect of the present invention, there is provided a digital audio signal recording method according to the third aspect, wherein the dubbing order of the audio to be recorded on the recording medium is such that a change in volume is moderate. When deciding so as to determine the average volume of each audio from the stored volume information, the ascending or descending order of the average volume of each audio is dubbed when recording the audio on the recording medium. The order is determined.

A digital audio signal recording method according to a twelfth aspect of the present invention is the digital audio signal recording method according to any one of the first and second aspects, wherein each audio is recorded on the recording medium. When determining the reference sound volume, the integrated volume information per unit time of each audio is detected from the stored volume information, and the unit time of each audio is calculated from the integrated value per unit time of each audio. Calculates the maximum integrated value volume per unit and the minimum integrated value volume per unit time, and calculates the maximum integrated value volume of the maximum integrated value volume per unit time for each audio and the minimum integrated value per unit time for each audio A dynamic range is specified by using a minimum integrated value sound volume among the value sound volumes, and the dynamic range is determined as a reference sound volume when each sound is recorded on the recording medium. To.

A digital audio signal recording method according to a thirteenth aspect of the present invention is the digital audio signal recording method according to any one of the first and second aspects, wherein each audio is recorded on the recording medium. When determining the reference sound volume, the integrated sound volume information per unit time of each sound is detected from the stored sound volume information, and the integrated value per unit time of each sound is detected for each sound. The average integrated volume is calculated, and any one of the average integrated volume of each voice, or the average integrated volume of each average integrated volume of each voice is stored in the recording medium. Is determined as a reference sound volume for recording.

A digital audio signal recording method according to a fourteenth aspect of the present invention is the digital audio signal recording method according to the thirteenth aspect, wherein a reference sound volume for recording each audio on the recording medium is adjusted. Upon determining, from the stored volume information, volume integrated value information per unit time of each audio during a period in which the volume of each reproduction signal continuously exceeds a predetermined value is detected. It is characterized by the following.

A digital audio signal recording method according to a fifteenth aspect of the present invention is the digital audio signal recording method according to any one of the first and second aspects, wherein each reproduced signal is recorded in accordance with the calculated volume. When adjusting the volume of each of the reproduction signals, the volume of each reproduction signal is adjusted in consideration of the volume reproduction information of the reproduction system of the recording medium.

A digital audio signal recording method according to a sixteenth aspect of the present invention is the digital audio signal recording method according to the third aspect, wherein after determining a dubbing order of audio to be recorded on the recording medium, Set the volume of the playback signal
The volume is adjusted to each volume according to the volume reproduction information of the reproduction system of the recording medium.

According to a seventeenth aspect of the present invention, there is provided a digital audio signal recording apparatus for selecting a plurality of digitalized audio signals to be recorded on a recording medium, and detecting the digital audio signal from a reproduced signal of each audio signal. Volume information detection means for calculating volume information by performing calculations on the reproduced signals of the voices, volume information storage means for storing the volume information, and storing the voices on the recording medium based on the stored volume information. Volume determining means for determining a reference sound volume for recording on the recording medium, and calculating the sound volume of each sound when recording each sound on the recording medium from each reproduction signal based on the reference sound volume; Volume adjustment means for adjusting the volume of each reproduction signal according to the adjusted volume, and recording signal generation means for generating an adjusted recording signal in accordance with the standard of the recording medium from each adjusted reproduction signal Consists, characterized by dubbing to adjust the volume of each reproduction signal by the volume control means so that the volume is constant during audio playback of the audio recorded on the recording medium.

The digital audio signal recording apparatus according to claim 18 of the present invention includes a selecting means for selecting a plurality of digitalized audio signals to be recorded on a recording medium, and detecting from a reproduced signal of each audio signal. Volume information detection means for calculating volume information by performing calculations on the reproduced signals of the voices; volume information storage means for storing the volume information; and storing each voice in the recording medium based on the stored volume information. And a dubbing order determining means for determining a dubbing order when recording is performed so that a change in volume becomes gentle, and dubbing is performed in accordance with the determined dubbing order.

A digital audio signal recording apparatus according to a nineteenth aspect of the present invention is the digital audio signal recording apparatus according to any one of the seventeenth and eighteenth aspects, wherein the compression-encoded digital audio signal is recorded. And a coded data readout unit for performing a decoding process and a data decompression process, wherein an output signal of the coded data readout unit is used as a reproduction signal.

A digital audio signal recording apparatus according to a twentieth aspect of the present invention is the digital audio signal recording apparatus according to any one of the seventeenth and eighteenth aspects, wherein each digital audio reproduction signal is encoded. And encoded data generating means for performing a compression encoding process, wherein the compression-encoded digital audio signal is recorded on the recording medium.

A digital audio signal recording apparatus according to a twenty-first aspect of the present invention is the digital audio signal recording apparatus according to the twentieth aspect, wherein each of the reproduced signals of the audio is subjected to an encoding process and a compression encoding process. And a digital audio signal compressed and encoded on the recording medium.

According to the present invention, even when the volume of a plurality of digital signals is varied, the volume of each voice can be adjusted without adjusting the volume when reproducing the voice recorded on the recording medium. Sound reproduction can be performed at a constant level. In addition, sound reproduction can be performed without causing any discomfort to the listener because the sound volume changes gradually when reproducing the sounds recorded on the recording medium in the order of recording.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of a digital audio signal recording apparatus according to Embodiment 1 of the present invention, and FIG. 3 is a digital audio signal recording method according to Embodiment 1 of the present invention. FIG. 4 is a flowchart showing the processing procedure of FIG. In FIG. 1, reference numeral 1 denotes an input terminal connected to reproducing means (not shown) for reproducing a digital audio signal recorded on a first recording medium (hereinafter referred to as a reproducing medium), and 2 denotes a digital audio signal. Recording means (not shown) for recording on a second recording medium (hereinafter, referred to as a recording medium)
An output terminal 3 connected to the terminal detects volume information from a reproduction signal output from the reproduction means, and obtains volume information by performing an operation on the reproduction signal (hereinafter, volume information is detected from the reproduction signal, Also, obtaining volume information by performing an operation on a reproduced signal is referred to as detecting volume information.) Volume information detecting means having a function, 4 is volume information storing means for storing the volume information, and 5 is the stored volume. Dubbing volume determination means for determining a dubbing volume level of the digital audio signal when dubbing the digital audio signal from the reproduction medium to the recording medium based on the information; and a volume for adjusting the reproduction signal according to the determined dubbing volume level. The adjusting means 7 comprises an adjusted recording signal (hereinafter referred to as a recording signal) in accordance with the standard of the recording medium from the reproduction signal output from the volume adjusting means 6. A recording signal generating means for generating a. It should be noted that the digital signal recorded on the reproduction medium includes volume data and time data in addition to the digital audio signal. However, in the embodiment of the present invention, only the digital audio signal is handled and the reproduced signal is processed. Represents a digital audio signal (audio data) that has been subjected to EFM modulation or the like.

The operation of the first embodiment will be described below with reference to FIGS. It is assumed that music is digitalized sound and that an optical disk recording medium such as a CD is a reproduction medium on which a digital audio signal is recorded. On a CD, a signal (PCM audio data) obtained by converting an analog signal (audio signal) into a digital audio signal according to a standard called linear PCM (sampling frequency: 44.1 kHz, quantization bit number: 16 bits) is recorded.

When dubbing is performed, dubbing music, a dubbing order, and the like are designated by dubbing music setting means (not shown) (step 101). When all the dubbing songs and the like are designated, dubbing work is started. First step 1
According to the dubbing order determined by 01, the music selected from the reproduction media is reproduced until the number of reproduced music becomes 0 (step 102) (step 103). A digital audio signal that has been subjected to EFM demodulation and decoding processing by the reproduction means is input to the input terminal 1 as a reproduction signal (PCM audio data), and the volume information detection means 3 extracts volume information from the reproduction signal of the first music. To detect.
Although a detailed description of a method of detecting the volume information will be described later, volume information such as a maximum volume level, a minimum volume level, and an average volume level is detected for each reproduced music (step 104). First
During or after the reproduction of the music piece, the volume information of the first music piece is stored in the volume information storage means 4 (step 105).
Then, the number of reproduced music pieces is decremented by one (step 106), and if there is a next music piece, the next music piece is designated and the same volume information detection work is continued.

If it is not necessary to reproduce the sound at the time of detecting the sound volume information, it is not necessary to perform the sound volume detection processing at a normal sound reproduction speed. May be saved. In this way, the volume information of a plurality of dubbed songs can be detected and stored in a short time. The volume information may be detected and stored in a semiconductor memory or the like each time dubbing is performed, and may be completely erased when the dubbing process is completed, or may be written in a non-volatile memory such as a hard disk to reduce the capacity. As long as it is allowed, the system may be stored. If the volume information is stored at the time of the first dubbing, it is not necessary to perform the volume information detecting process again at the time of another dubbing for the same music, and only the stored volume information need be used. As a development of this application, when a song is downloaded to a hard disk or the like via a network, the downloaded song is configured to be associated with volume information stored in a nonvolatile memory of the hard disk. If the sound volume information is not stored in the nonvolatile memory, the sound volume information may be detected and the sound volume information may be stored.

If the volume information of all the songs for which dubbing has been designated can be detected, the dubbing volume level is determined by the dubbing volume determining means 5 (step 107), and the dubbing volume level is adjusted to the volume for adjusting the volume of each song during dubbing. This is information for adjustment. I'll explain how to decide later,
For example, from the volume information of the maximum volume level and the minimum volume level of each song to be dubbed, the maximum volume level of all the maximum volume levels and the minimum volume level of all the minimum volume levels are detected. The dubbing volume level of each song is determined so as to be the maximum volume level and the minimum volume level of each song during dubbing. Once the dubbing volume level is determined, the recording operation of the selected song is started. Step 1
01 (step 108) until the number of recorded songs becomes zero (step 10).
9) Generate a recording signal to be recorded on the recording medium from the music selected from the reproduction medium. First, the selected music piece is reproduced (step 110), and the volume adjusting means 6 adjusts the volume level of the reproduced signal according to the determined dubbing volume level (step 111). The recording signal generation means 7 performs signal processing such as error correction coding or interleaving called encoding processing on the reproduced signal whose volume level has been adjusted, performs EFM modulation or the like according to the recording medium, and generates a recording signal.
Output from the output terminal 2 (step 112). The recording signal output from the output terminal 2 is recorded on a recording medium by recording means (not shown) connected to the output terminal 2. When the recording of the first tune is completed, the number of tunes to be recorded is decremented by 1 in order to record the next designated tune (step 113), and the process is repeated until the number of tunes to be recorded becomes zero (step 10).
9).

In the recording operation as well as in the volume information detection operation, the recording speed may be adjusted if the recording means can record at several times or more speed. As described above, the dubbing can be performed at a high speed if there is a reproducing unit and a recording unit at double speed or higher. When a compression-encoded recording signal is generated to record more songs within the limited recording capacity of the recording medium and is recorded on the recording medium, the recording signal generating means 7 converts the compression signal into a digital audio signal. Measure Then, an encoding process or the like is performed.
For example, it may be configured to generate a compressed signal according to a compression standard such as Dolby (registered trademark) digital (AC-3) used in DVD or MP3 and output a recording signal.

Next, a method for detecting volume information will be described. The volume information detecting means 3 can detect the volume level, maximum volume level, and minimum volume level of each song as volume information from the reproduction signal, and calculate the average volume level per song or per chorus. . In addition, it is also possible to detect the volume level change amount of each song for each time and the integrated value data (volume integrated value information) of the volume level per unit time. Note that the integrated value data of the volume level per unit time is not calculated from the volume levels of all the times in one song, but is set at a certain volume level and continuously exceeds the volume level. It may be calculated from the sound volume level during a certain period. Further, if the configuration is such that the reproduced signal is passed through a band-pass filter or the like and divided into low, middle, and high frequency bands and volume information such as the maximum and minimum volume levels of each frequency band is detected, Thus, it is also possible to perform volume adjustment suitable for setting the sound range of the playback device. There is also a configuration method for detecting the volume level of each channel when there are voices of a plurality of channels at the same time (for example, a configuration method corresponding to a stereo format and detecting the volume information of each channel such as an L channel and an R channel).

Detection of the volume level (amplitude value) can be easily performed because the audio signal (analog signal) is converted into a digital signal. For example, in the case of a CD in which an audio signal (PCM audio data) digitized according to the linear PCM standard (quantization bit number 16 bits) is recorded, the volume level of each song is calculated from the 16-bit value representing the amplitude value. , And the average volume level and the like can be easily calculated from the 16-bit value. The same applies to a case where a digital audio signal is recorded according to a DVD audio standard or the like (sampling interval, bit number, etc.) different from linear PCM. Various compression-encoded sounds will be described later. Note that some playback media have a maximum volume value or the like recorded in advance as volume data.
In such a case, it is only necessary to detect the recorded volume data as volume information.

Next, the volume information storage means 4 will be described. The volume information storage means 4 stores the reproduced music number, the maximum volume level and the reproduction time from the beginning of the music, the minimum volume level and the reproduction time from the beginning of the music, and the average volume level. The volume information of each song stored as described above is used to derive a volume setting suitable for dubbing. As described above, the volume information storage means 4 may have a function of deleting all stored volume information when the dubbing process is completed, or a function of storing the volume information as long as the capacity permits. Further, if the function is to detect and store the volume information at the time of the first dubbing, the volume information detecting process can be omitted for a song for which the volume information is stored at another dubbing.

Next, a method of determining the dubbing volume in the dubbing volume determining means 5 will be described. To make the maximum volume level and the minimum volume level of each song the same (to make the dynamic range the same for each song), and to perform volume adjustment, the maximum volume level, the minimum volume level, and the The volume level for each time is detected from the volume information stored in the volume information storage unit 4, and the dubbing volume determination unit 5 detects the maximum and minimum volume levels of all the songs to be dubbed. The maximum and minimum volume levels are determined as the maximum and minimum volume levels when dubbing each song. Then, (volume level at a certain point−minimum volume level of the song) / (maximum volume level of the song−minimum volume level of the song) is calculated, and using this, the maximum volume level and minimum volume of each song are calculated. A volume level for each time when the volume level is the same as the maximum volume and the minimum volume during dubbing is calculated, and the calculated volume level for each time is determined as the dubbing volume level. When adjusting the volume by checking the average volume level of each song and the volume level at each time, one of the average volume levels of each song stored in the volume information storage means 4 is replaced with the average volume during dubbing. Is determined as a level, and the volume level at each point in time of each song is calculated from the average volume level of the song by using the volume level for each time, and calculated by using the calculated volume level. A method of calculating the volume level for each time when the average volume level of the dubbing and the average volume level at the time of dubbing are the same, and determining the calculated volume level for each time as the dubbing volume, or A method of calculating the average of each average volume level of each song from the average volume level, determining the average as the average volume level during dubbing, and determining the dubbing volume level (volume level of each song per time). There is.

As another method, the maximum integrated value volume level of each song is calculated from the integrated value data of the volume level per unit time,
There is also a method of calculating the minimum integrated value volume level and the average volume level so that the integrated value volume level between the songs is substantially the same. For example, the maximum integrated volume level and the minimum integrated volume level of each song are detected from the integrated data of the volume level per unit time of each song, and the integrated volume level per unit time of each song is Calculate what percentage is added from the minimum integrated value volume level, determine the maximum integrated value volume level and the minimum integrated value volume level when dubbing each song, and in each song, the original maximum integrated value volume level and minimum integrated value volume level Is calculated as the maximum integrated value volume level and the minimum integrated value volume level at the time of dubbing, the integrated value volume level per unit time is calculated, and thereby the dubbing volume level is determined. The method of making the integrated volume level of each song almost the same (making the dynamic range of each song almost the same), and the integration of the volume level of each song per unit time And the average volume level of each song from the data, what premium (what percent year-on-year) integrated value volume level per unit time from the average volume level of the song to calculate the transient,
The average volume level at the time of dubbing of each song is determined, and for each song, the integrated volume level per unit time when the original average volume level is the same as the average volume level at the time of dubbing is calculated. In this case, the dubbing volume level is determined as the dubbing volume level so that the integrated value volume level between the songs becomes substantially the same (the sound pressure of each song is made substantially the same). It should be noted that the integrated value volume level per unit time in a period that continuously exceeds a set certain volume level is used instead of the integrated value volume level of all the songs, Calculate the average integrated value volume level of the integrated value volume level per unit time for the amount exceeding the volume level and the average of the average integrated value volume level, and determine this as the average integrated value volume level at dubbing, In the above period, when the integrated value volume level per unit time is calculated from the set volume level as a percentage, and the original average integrated value volume level is the same as the average integrated value volume level during dubbing. A method of calculating the integrated value volume level per unit time in the period, and determining the dubbing volume level based on the calculated value, or the method of determining the original average integrated value volume level Mean not calculated, and based on the arbitrary one, the average integration value volume level of the other periods is also a method in which the same this reference.

The determined dubbing volume level is
The configuration may be such that it is erased when dubbing is completed, or it may be stored as long as the capacity permits. If the dubbing volume level previously determined for dubbing remains, the volume difference between a plurality of recording media can be reduced by referring to the dubbing volume level from the next time.

Further, when the standard of the digital audio signal is different between the reproduction medium and the recording medium, for example, a CD and a DV
Definitions such as D audio having different sampling rates and quantization bit numbers (for example, when comparing the quantization bit numbers, CDs are 16 bits, and DVDs are 24 bits) are definitions in which different bit numbers are aligned (for example, 24
A volume which is a table defining conversion rules such as a definition for rounding bit information to 16-bit information and a definition for aligning data of different sampling rates (for example, interpolating a signal having a sampling rate of 48 kHz into a signal having a sampling rate of 44.1 kHz). By providing a conversion table, the dubbing sound volume level is determined by converting the sound volume at the time of sound reproduction to the same level. In addition, by using the volume conversion table, it is possible to define, when there are voices of a plurality of channels at the same time, how many signals are to be added to which channels.

The volume adjusting means 6 adjusts the reproduction signal so that the volume level of the reproduction signal of each music becomes the volume level of each music determined by the dubbing volume determination means 5. For example, the maximum volume level and minimum volume level of each song and the volume level of each time are used as volume information, and the maximum volume level and the minimum volume level when dubbing each song are determined. (So that the maximum and minimum volume levels of each song are the same)
When the volume level of each reproduction signal for each time is calculated and determined as the dubbing volume level, the volume adjusting means 6 sets the volume so that the volume level for each reproduction signal of each time becomes the same as the determined dubbing volume level. Make adjustments. Also,
Using the average volume level of each song and the volume level of each time as volume information, determine the average volume level during dubbing from the average volume level of each song, and the average volume level of each song becomes the average volume level during dubbing As described above (so that the sound pressure of each song is the same), the volume level at each time of each reproduction signal is calculated, and if this is determined as the dubbing volume level, the volume adjusting means 6 sets the volume at each time of each song. The volume is adjusted so that the level becomes the same as the determined dubbing volume level.
Alternatively, a predetermined value is set in advance in the apparatus, and if the variation in the average volume level of each song exceeds the specified value, the dubbing volume determination means 5 sets the average of each song so that it falls within the specified value. There is also a method of determining a volume level and determining the determined average volume level of each music piece as an average volume level during dubbing. It should be noted that the specified value may be determined by the user himself / herself before starting dubbing by setting the amount of variation of the average volume to within what percentage.

Further, in addition to the adjustment of the dynamic range and the sound pressure level, it is determined whether or not the volume level at the beginning and end of each song is suddenly changed by using the amount of change in the volume of each song over time. By detecting and suddenly changing the volume level before and after, if it changes suddenly, the dubbing volume level that can give the effect of fade-in and fade-out to each song is determined. Can also be adjusted according to

As described above, there are various methods for making the volume of each music piece substantially the same, and the setting such as whether the sound pressure is adjusted to be the same or the dynamic range is adjusted is used. The configuration may be such that it can be used properly according to the preference of the user. In addition, if there are many songs whose volume changes drastically, adjust the dynamic range to be the same, and if there are many songs whose volume changes are little, adjust the sound pressure to be the same. For example, the volume becomes easy to hear during playback. In addition, the sound volume may be adjusted not only for the entire music piece but also for a part thereof. For example, the maximum volume level and minimum volume level of each song are displayed on a display outside the device, and the user determines the maximum volume level and minimum volume level of the song for any song while watching the display, and dubbing. There is also a method in which the sound volume determination means 5 calculates the sound volume level for each time of the arbitrary music based on the determined maximum volume level and minimum volume level, and determines this as a dubbing volume level. You can also fine-tune the dubbing volume level.

Further, each song after the adjustment of the volume level of the reproduction signal is further adjusted so that the dubbing volume level according to the volume reproduction information (maximum output amount, purpose of use, etc.) in the reproduction system of the recording medium is obtained. By performing the adjustment in consideration of the volume reproduction information by the volume adjusting means 6, it is possible to reproduce at the volume suitable for the reproduction system of the recording medium when reproducing the recording medium. Thereby, even when dubbing the same song, dubbing can be performed so that the reproduction volume for the car stereo and the reproduction volume on the portable player, the case of reproducing in a wide space and the case of reproducing in a narrow space are different. effective. As a sound volume adjustment method taking into account the sound volume reproduction information, for example, there is a method in which the sound volume level of the reproduced signal can be manually set stepwise as large, medium, or small in the sound volume adjusting means 6, and the like. In this case, the volume level can be adjusted to the situation of the output wattage of the reproduction speaker or the like.

In the first embodiment, an example has been described in which an apparatus for reproducing an optical disk recording medium such as a CD is used as a reproduction signal input from the input terminal 1. It may be downloaded via the Internet. The present invention is also effective when dubbing is performed not only on a removable recording medium such as an optical disk, a magnetic disk, and a semiconductor card, but also on a recording medium such as a fixed hard disk. Also, the case of dubbing by designating a plurality of songs has been described. However, the same applies to volume adjustment at the time of dubbing of each program such as a language training program or a TV drama, not limited to music and the like. By dubbing with the configuration, the same effect can be obtained during reproduction.

According to the first embodiment, volume information is detected from the volume of the reproduction signals of a plurality of designated music pieces, the dubbing volume is determined from the volume information, and the designated dubbing volume is specified based on the determined dubbing volume. By adjusting the volume of the reproduction signals of a plurality of songs and generating an adjusted recording signal, variations in the volume of each dubbing song during dubbing are eliminated, and volume adjustment for each song during dubbing song playback is made unnecessary. A recording device for a digital audio signal can be provided.

(Embodiment 2) FIG. 4 is a flowchart showing a processing procedure of a digital audio signal recording method according to Embodiment 2 of the present invention. Since the configuration can be realized with the same configuration as that of FIG. 1 used for the description of the first embodiment of the present invention, detailed description thereof is omitted.

The second embodiment differs from the first embodiment in that the first embodiment determines the dubbing sound volume after reproducing all dubbed songs and detecting the sound volume information. No. 2 is that after reproducing only the first music piece and detecting the volume information, the dubbing volume is determined only by the volume information of the first music piece, and the second and subsequent music pieces are adjusted so as to match the volume of the first music piece. .

When dubbing is performed, a dubbing music number or the like is designated by dubbing music setting means (not shown) (step 121). When all dubbing songs are designated, dubbing work is started. First, reproduction is started from the first music (step 122). The volume information detecting means 3 detects volume information from the reproduced signal (step 12).
3). The method of detecting the volume information is the same as in the first embodiment. This volume information is stored in the volume information storage means 4 (step 124). Then, the recording signal generating means 7
A recording signal is generated from the reproduction signal of the music piece, and the recording signal is output from the output terminal 2 (step 125). The stored volume information of the first song is used as a reference when the dubbing volume determination means 5 determines the dubbing volume for the second and subsequent songs.

When the reproduction of the first tune is completed, the number of recorded tunes is decremented (step 126), and if there is a next specified tune, it is reproduced (steps 127 to 128), and volume information detection processing is performed (step 129). The dubbing volume of the second song is determined by the dubbing volume determination means 5 based on the detected volume information of the second song and the stored volume information of the first song (step 130). The method of determining the dubbing volume is the same as in the first embodiment. For example, if the dynamic range of the first and second songs is the same, (volume level at a certain point−minimum volume level of the second song) / (maximum volume level of the second song−the second song) (The minimum volume level), and using this, the stored volume of the first tune and the volume of the second tune when the maximum volume and the minimum volume of the second tune are the same are used. The level is calculated, and the calculated volume level at each time is determined as the dubbing volume level. According to the dubbing sound volume level determined as described above, the sound volume adjusting means 6 adjusts the sound volume level of the reproduction signal of the second music (step 131). Then, the second adjustment of the volume level by the recording signal generation means 7 is performed.
A recording signal is generated from the reproduction signal of the music piece, and the recording signal is output from the output terminal 2 (step 132). The recording signal is transmitted by recording means (not shown) connected to the output terminal 2.
It is recorded on a recording medium. When the recording of the second song is completed, the number of recorded songs is decremented by 1 (step 126) to record the next designated song, and the process is repeated until the number of recorded songs becomes zero (step 127).

If a volume conversion table is provided in the same manner as in the first embodiment, even if the standard for recording a digital audio signal is different between the reproduction medium and the recording medium,
It can be converted so that the volume at the time of audio playback is the same level, and if there are multiple channels of audio at the same time, define which channel signal should be added to which channel at what percentage. Can be. Also,
At the time of sound volume detection and recording work, reproduction and recording can be performed at a speed several times higher or faster if there is no need for audio reproduction. The reproduction signal input from the input terminal 1 is
The present invention can be applied not only to a recording medium from an optical disk recording medium but also to a form in which a broadcast signal is received. Is valid. In addition, for the music after the adjustment of the volume level of the reproduction signal is completed, the volume adjustment means 6 further adjusts the volume after adjusting the volume level of the reproduction signal so that the dubbing volume level corresponds to the volume reproduction information in the reproduction system of the recording medium. Thus, when the recording medium is reproduced, the reproduction can be performed at a volume suitable for the reproduction system of the recording medium.

Furthermore, the same effect can be obtained at the time of reproduction by dubbing with a similar configuration not only for music such as music but also for volume adjustment at the time of dubbing of a TV drama or the like.

According to the second embodiment, an effect equivalent to that of the first embodiment can be obtained by adjusting the volume of the second and subsequent songs to be equal to the volume of the first song and recording the adjusted volume on the recording medium. In addition to that, dubbing music can be reproduced only once, so that dubbing time can be shortened.

(Embodiment 3) FIG. 2 is a block diagram showing the configuration of a digital audio signal recording apparatus according to Embodiment 3 of the present invention, and FIG. 5 is a digital audio signal recording apparatus according to Embodiment 3 of the present invention. FIG. 4 is a flowchart showing a processing procedure of the recording method of FIG. In FIG. 2, reference numeral 11 denotes an input terminal connected to a reproducing means (not shown) for reproducing a digital audio signal recorded on a reproducing medium; and 12, a recording means (not shown) for recording a digital audio signal on a recording medium. , An output terminal 13, a volume information detector having a function of detecting volume information from a reproduction signal output from the reproduction unit, a volume information storage unit 14 for storing the volume information, and a volume information storage unit 15. Dubbing order determining means 17 for determining the dubbing order of each song from the volume information, and a recording signal generating means 17 for generating a recording signal from a reproduction signal.

Embodiment 3 is different from Embodiment 1 in that Embodiment 1 determines a dubbing volume based on volume information from each song, and adjusts the volume of each song according to the determined dubbing volume. By generating a recording signal for each song, the volume at the time of reproducing the dubbed song recorded on the recording medium is made constant, whereas in the third embodiment, the volume of each song is not adjusted, and the volume of each song is not adjusted. By determining the order of recording on the recording medium in accordance with the volume information, a change in the volume between the songs when reproducing the dubbed music recorded on the recording medium is moderated.

The operation of the third embodiment will be described below with reference to FIGS. When dubbing,
A dubbing music or the like is designated by a dubbing music setting means (not shown) (step 141). When all dubbing songs are designated, dubbing work is started. First step 1
According to the dubbing order determined by 41, the music selected from the reproduction media is reproduced until the number of reproduced music becomes 0 (step 142) (step 143). The volume information detecting means 13 detects volume information from the reproduction signal (PCM audio data) of the first music (step 14).
4). The method of detecting the sound volume by the sound volume information detecting means 13 is the same as that described in the first embodiment. During or after the reproduction of the first song, the volume information for the reproduced song is stored in the volume information storage unit 14 (step 145). The function of the volume information storage unit 14 is the same as that described in the first embodiment. Then, the number of reproduced music pieces is subtracted by 1 (step 14).
6) If there is a next song, specify the next song and continue the volume detection work.

If the volume information of all the songs for which dubbing is designated can be detected, the dubbing order determining means 15 determines the dubbing order of the dubbing songs (step 147). The determination method will be described later in detail. Once the dubbing order is determined, the recording operation of the selected music starts. Based on the number of music pieces set by the dubbing music setting means (step 14
8) Until the number of recorded songs becomes zero (step 14)
9) Generate a recording signal for recording the selected music piece on a recording medium. The selected music is reproduced according to the dubbing order determined by the dubbing order determining means 15 (step 150).
A recording signal is generated by the recording signal generation means 17 and output terminal 1
2 outputs a recording signal (step 151). In addition,
The recording signal generator 17 has the same function as the recording signal generator 7 of the first embodiment. The recording signal is recorded on a recording medium by recording means (not shown) connected to the output terminal 12. When the recording of the first song is completed, the number of recorded songs is decremented by one for the next recording (step 152), and the process is repeated until the number of recorded songs becomes zero (step 14).
9).

As in the case of the first embodiment, if the reproducing means and the recording means can reproduce and record at several times or more speed at the time of detecting the volume information and at the time of recording, the speed may be adjusted to the speed. As described above, dubbing can be executed at a high speed if there is a reproducing unit and a recording unit at a double speed or higher.

As a method of determining the dubbing order, for example, the maximum volume level or the minimum volume level of each song is detected as volume information from the volume information storage unit 14, and the maximum volume level or the minimum volume level is determined. There is a method of determining the dubbing order so that the songs can be played back in order.
As another method, there is a method of detecting the average volume level of each song as volume information from the volume information storage unit 14 and determining the dubbing order so that the songs are rearranged in the order of the average volume level. As a result, it is possible to perform a gradual change in volume when reproducing the recording medium without changing the volume of the original music. For example, if the dubbing order is determined so that the songs can be played in the order of the largest volume level, the playback volume will increase in order during playback, and the volume will be adjusted unless it is necessary to intentionally increase the volume. No need to do. The setting of the descending order or the ascending order of the volume may be set when the dubbing music is designated. The user can specify which of the maximum volume level and the average volume level is to be prioritized, or, for example, according to the information on the volume level change amount of the dubbed song, select the order of the maximum volume level when there are many songs whose volume changes rapidly. For example, the setting of the dubbing order may be performed automatically.

As in the first embodiment, a dubbing sound volume determining means and a sound volume adjusting means are provided, and when the sound volume information is detected, the amount of change in the sound volume level per time of each music piece is detected, the dubbing order is determined, and the sound volume descends. When recording with etc., by raising or lowering the volume level before and after the volume level at the beginning and end of the song suddenly changes,
As a result, it is possible to obtain an effect that reproduction can be performed without impairing the sound volume of the music as much as possible and without a sudden change in the sound volume between the music pieces. Further, as in the first embodiment, a function of providing volume reproduction information in the reproduction system of the recording medium to the volume adjustment means and having a function of reproducing at a volume suitable for the reproduction system can be provided.

If the volume information of the dubbed music is stored, a configuration can be adopted in which music having similar volume information is preferentially automatically selected, and the volume of the BGM is small with little change in volume without losing the original volume. Dubbing with selected songs can be performed.

As in the first embodiment, the reproduced signal input from the input terminal 11 may be not only a signal from an optical disk recording medium but also a form for receiving a broadcast signal.
The recording medium connected to the output terminal 12 may be not only an optical disk recording medium but also a fixed hard disk or the like. The provision of the sound volume conversion table can cope with the case where the standard for recording the digital audio signal is different between the reproduction medium and the recording medium.

According to the third embodiment, the volume information is detected and stored from the volume of the reproduction signals of a plurality of designated music pieces, and the dubbing order is determined from the stored volume information of each music piece. In order to perform dubbing by changing the order of the dubbed songs according to the dubbing order information (by rearranging the songs in descending or ascending order of the volume), when reproducing the dubbed songs recorded on the recording medium, the change in the volume is gradual, Reproduction without harshness becomes possible.

(Embodiment 4) FIG. 6 is a block diagram showing the configuration of a digital audio signal recording apparatus according to Embodiment 4 of the present invention, and FIG. 7 is a digital audio signal recording apparatus according to Embodiment 4 of the present invention. FIG. 4 is a flowchart showing a processing procedure of the recording method of FIG. In FIG. 6, reference numeral 21 denotes an input terminal connected to a reproducing means (not shown) for reproducing coded data (digital audio signal) which has been compressed and coded recorded on a reproducing medium; Output terminal connected to recording means (not shown) for recording the encoded data (digital audio signal) on a recording medium; 23, a volume information detecting means having a function of detecting volume information from a reproduced signal; Means for storing volume information,
25 is a dubbing volume determining means for determining a dubbing volume when dubbing a music piece from the reproduction medium to the recording medium from the stored volume information, and 26 sets a volume level of a reproduction signal in accordance with the determined dubbing volume level. A sound volume adjusting means for adjusting, 27 is a coded data reading means for performing decoding processing and data decompression processing on the coded data which has been compressed and coded to generate a reproduction signal, and 28 is compression-coding a reproduction signal whose volume has been adjusted. This is encoded data generation means for performing processing and encoding to generate a recording signal.

The fourth embodiment differs from the first embodiment in that a means for reproducing and recording compressed and encoded data is added. Hereinafter, FIGS. 6 and 7
The operation of the fourth embodiment will be described with reference to FIG. For example, it is assumed that a DVD video disk that is compression-encoded by a method such as MPEG is used as a reproduction medium. In the DVD video standard, for example, Dolby Digital (AC-
3) Signal compression is performed using a compression coding standard such as a method. By converting an analog audio signal into a digital audio signal and subjecting the original digital audio signal to signal compression, the original digital audio signal is compressed to a fraction of the original digital audio signal.

When dubbing is performed, dubbing music and the like are designated by dubbing music setting means (not shown) (step 201). When all dubbing songs are designated, dubbing work is started. First, in accordance with the dubbing order determined in step 201, the music selected from the reproduction media is reproduced (step 203) until the number of reproduced music becomes zero (step 202). The coded data reading means 27 decodes the audio signal component from the compressed and coded input signal (step 204), performs data decompression processing to obtain a reproduced signal (step 205). Then, the volume detecting means 23 detects volume information from the reproduction signal (step 206). The details of the volume detection method are the same as in the first embodiment. During or after the reproduction of the first music, the volume information for the reproduced music is stored in the volume information storage means 24 (step 207). Volume information storage means 24
The details of the function are the same as in the first embodiment. Then, the number of reproduced music pieces is decremented by one (step 208), and if there is a next music piece, the next music piece is designated and the sound volume detection work is continued.

When the volume information of all the songs for which dubbing has been designated can be detected, the dubbing volume determining means 25 determines the dubbing volume level (step 209), and the recording operation of the selected song starts. The details of the dubbing volume determination method are also the same as in the first embodiment. Based on the number of recorded songs set by the dubbing song setting means (step 210), a recording signal for recording the selected song on a recording medium is generated until the number of recorded songs becomes zero (step 211). First, the selected music piece is reproduced (step 212), and the volume adjusting means 26 adjusts the volume level of the reproduced signal subjected to the decoding process (step 213) and the data expansion process (step 214) according to the determined dubbing volume level. (Step 21
5). The details of the volume adjustment method are the same as in the first embodiment. The decoding process refers to a process of demodulating a signal modulated by an encoding process or the like and performing an error detection or a correction process. The data decompression process refers to a process of returning a compression-encoded signal to an uncompressed reproduction signal such as PCM.
The encoded data generating means 28 compresses and encodes the reproduced signal whose volume level has been adjusted (step 2).
16) and encode processing (step 217) to generate a recording signal, and output the recording signal from the output terminal 22 (step 218). The recording signal is recorded on a recording medium by recording means (not shown) connected to the output terminal 22. When the recording of the first tune is completed, the number of recorded tunes is decremented by 1 in order to record the next designated tune (step 21).
9) The process is repeated until the number of recorded music pieces becomes 0 (step 211).

When the data is compression-encoded by a method other than the standard of the compression-encoded signal recorded on the reproduction medium and recorded on the recording medium, the encoded data generation means 28
Suitable for the reproducing method of a reproducing apparatus for a recording medium, for example, MP
After performing a compression encoding process in accordance with a compression standard such as No. 3, a recording encoding process may be performed.

In the fourth embodiment, as in the first embodiment, if the reproducing means and the recording means can reproduce and record at several times or higher speed, it is necessary to perform dubbing at a normal (at the time of audio reproduction) speed. There is no. In addition, D
Although a VD video disk is assumed, the broadcast signal may be received or downloaded via a network. When performing a dubbing process on a removable recording medium such as a semiconductor card or a fixed hard disk, the recording medium may be used. The present invention is also effective.

Further, the dubbing with the same configuration is not limited to music and other programs, but can also be used for dubbing the volume of each program such as a language training program or a TV drama when dubbing. Can be obtained.

According to the fourth embodiment, a decoding signal and a data decompression process are also performed on a digital audio signal that has been compression-encoded to generate a reproduction signal, and volume information is detected from the generated reproduction signal. Determine the dubbing volume when recording each song on the recording medium from the stored volume information of each song, adjust the volume of the playback signal according to the determined dubbing volume, and compress and encode again. By performing the processing to generate the recording signal, the same effect as in the first embodiment can be obtained.

(Embodiment 5) FIG. 8 is a flowchart showing a processing procedure of a digital audio signal recording method according to Embodiment 5 of the present invention. Since the configuration can be realized by the same configuration as that of FIG. 6 used for the description in the fourth embodiment of the present invention, detailed description thereof is omitted.

The fifth embodiment is different from the fourth embodiment in that the fourth embodiment reproduces all dubbing music composed of compression-encoded digital audio signals, detects volume information, and then determines the dubbing volume. On the other hand, in the fifth embodiment, after reproducing only the first song and detecting the volume information, the dubbing volume is determined only by the volume information of the first song,
The point is that the volume after the tune is adjusted to the volume of the first tune.

When dubbing is performed, dubbing music is designated by dubbing music setting means (not shown) (step 231). When all dubbing songs are designated, dubbing work is started. First, reproduction is started from the first music (step 232). Coded data reading means 27
Decodes the audio signal component from the encoded input signal (step 233), and performs data expansion processing on the compressed input signal to obtain a reproduced signal (step 23).
4). The volume information detecting means 23 detects volume information from the reproduced signal. The details of the volume information detection method are the same as those described in the first embodiment. (Step 235). First
During or after the reproduction of the song, the volume information for the reproduced song is stored in the volume information storage unit 24 (step 2).
36). The encoded data generating means 28 performs a compression encoding process (step 237) and an encoding process (step 238) on the reproduced signal of the first music to generate a recording signal, and outputs the recording signal from the output terminal 22 (step 2).
39). Note that the stored volume information of the first song is used as a reference when the dubbing volume determination unit 25 determines the dubbing volume for the second and subsequent songs.

When the reproduction of the first music is completed, the number of recorded music is reduced by one.
Subtraction is performed (step 240), and if there is a next song, the next song is designated (steps 241 to 242), and a decoding process and data decompression process are performed on the compression-coded digital audio signal of the next song (steps 243 to 244). ) A volume detection operation is performed (step 245).

The volume information of the second song and the stored first
Based on the volume information of the song, the dubbing volume level of the second song is determined by the dubbing volume determining means 25 (step 24).
6). The dubbing volume determination method is also the same as in the first embodiment. According to the determined dubbing volume level, the volume adjusting unit 26 adjusts the volume level of the reproduction signal of the second music piece subjected to the decoding process and the data expansion process (step 247). The encoded data generating means 28 performs a compression encoding process and an encoding process on the reproduction signal of the second music piece whose volume has been adjusted to generate a recording signal (step 2).
48 to 249), and outputs a recording signal from the output terminal 22 (step 250). Recording is performed on a recording medium by recording means (not shown) connected to the output terminal 22.
When the recording of the second song is completed, the number of recorded songs is decremented by 1 (step 240) to record the next designated song, and the process is repeated until the number of recorded songs becomes zero (step 24).
1).

Even when the standard is different between the reproduction medium and the recording medium, similarly to the fourth embodiment, it is sufficient to perform the decoding process and the data decompression process conforming to the standard of the recording medium at the time of recording. In addition, when the volume information is detected and the recording operation is performed, the reproduction and recording can be performed at a speed several times higher than the speed if the audio reproduction is not necessary. Also, the input terminal 21
The compression-encoded digital audio signal input from the PC may be in a form other than an optical disk recording medium such as a DVD, for example, in a form for receiving a broadcast signal or downloaded via a network, and the recording medium may be an optical disk recording medium such as a DVD. For example, a removable recording medium such as a semiconductor card or a fixed hard disk may be used, and the present invention is also effective when dubbing is performed on these.

Furthermore, dubbing with the same configuration is not limited to music and other music, but is also applied to volume control during dubbing of programs such as language training programs and TV dramas. Can be obtained.

According to the fifth embodiment, the same effect as that of the fourth embodiment can be obtained by adjusting the volume of the second and subsequent songs to be equal to the volume of the first song and recording the adjusted volume on the recording medium. In addition to that, dubbing music can be reproduced only once, so that dubbing time can be shortened.

As another example, a plurality of songs are designated, a decoding process and a data decompression process are performed on the compression-encoded signal of the designated songs, a reproduction signal is generated, and volume information is detected from the generated reproduction signal. The volume information may be stored, the order of songs to be recorded may be determined from the stored volume information of each song, and a recording signal may be generated according to the determined recording order information.

As described above, in the first to fifth embodiments, the case where the digital audio signal is recorded from the first recording medium or the like to the second recording medium has been described. It is also useful when playing audio from a medium. For example, when reproducing audio from a CD or the like, a DA converter may be provided instead of the recording signal generating means, and an amplifier such as a speaker may be provided at the output terminal.

[0085]

As described above, according to the present invention, volume information is detected from the reproduction signals of a plurality of designated songs and stored, and the dubbing volume is determined from the volume information of the stored plurality of songs.
By adjusting the volume of the reproduction signal in accordance with the determined dubbing volume, generating a recording signal and recording the recording signal on a recording medium, dubbing such that the volume of the recording medium during audio reproduction is constant and the audio is reproduced is performed. It is also possible to determine the dubbing order from the stored volume information of a plurality of songs, and record the dubbing songs on a recording medium according to the determined dubbing order, so that the volume change when playing the dubbing songs in the recording order is moderate. In addition, it is possible to reproduce sound without disturbing the listener.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a digital audio signal recording device according to Embodiments 1 and 2 of the present invention.

FIG. 2 is a block diagram showing a configuration of a digital audio signal recording device according to a third embodiment of the present invention.

FIG. 3 is a flowchart showing a procedure of a digital audio signal recording method according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing a procedure of a digital audio signal recording method according to the second embodiment of the present invention.

FIG. 5 is a flowchart showing a procedure of a digital audio signal recording method according to the third embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a digital audio signal recording device according to Embodiments 4 and 5 of the present invention.

FIG. 7 is a flowchart showing a procedure of a method for recording a digital audio signal according to the fourth embodiment of the present invention.

FIG. 8 is a flowchart showing a procedure of a digital audio signal recording method according to the fifth embodiment of the present invention.

[Explanation of symbols]

 1, 11, 21 Input terminal 2, 12, 22 Output terminal 3, 13, 23 Volume information detection means 4, 14, 24 Volume information storage means 5, 25 Dubbing volume determination means 6, 26 Volume adjustment means 7, 17 Recording signal Generating means 15 Dubbing order determining means 27 Encoded data reading means 28 Encoded data generating means

Claims (21)

[Claims] When a plurality of digitalized audio signals are arbitrarily selected and recorded on a recording medium, each audio is reproduced, and volume information is detected from each reproduced signal, or each reproduced signal is detected. The volume information is obtained by calculating the volume information by calculating the volume information, the volume information is stored, and the volume used as a reference when each sound is recorded on the recording medium based on the stored volume information. Is calculated, and based on this reference volume, the volume when each voice is recorded on the recording medium is calculated, each voice is reproduced again, and the volume of each reproduction signal is adjusted according to the calculated volume. By generating an adjusted recording signal conforming to the standard of the recording medium and recording the adjusted recording signal on the recording medium, the volume of each sound recorded on the recording medium during audio reproduction is made constant. Recording method of the digital audio signal, characterized in that. 2. When arbitrarily selecting a plurality of voices converted into digital signals and recording them on a recording medium, first, any one of the voices is reproduced, and volume information is detected from the reproduced signal. Or obtaining volume information by performing an operation on the reproduced signal to obtain volume information, storing the volume information, and recording other audio on the recording medium based on the stored volume information. Is determined, and an adjusted recording signal conforming to the standard of the recording medium is generated from the reproduced signal and recorded on the recording medium, and then other sounds are reproduced, respectively. To detect the volume information respectively,
Alternatively, the volume information is obtained by performing an operation on the other reproduced signal to obtain volume information, and when recording other audio on the recording medium based on the reference volume and other audio volume information. By calculating the volume of each of the other reproduction signals according to the calculated volume, generating an adjusted recording signal that conforms to the standard of the recording medium and recording the adjusted recording signal on the recording medium, A method for recording a digital audio signal, wherein the volume of audio recorded on a recording medium during audio reproduction is constant. 3. When a plurality of digitalized voices are arbitrarily selected and recorded on a recording medium, each voice is played back, and volume information is detected from each playback signal, or each playback signal is detected. The volume information is obtained by calculating the volume information by calculating the volume information, and the volume information is stored. Based on the stored volume information, the dubbing order of the audio to be recorded on the recording medium is changed according to the volume change. A method for recording a digital audio signal, characterized in that it is determined to be gradual, and an adjusted recording signal conforming to the standard of the recording medium is generated according to the determined dubbing order information and recorded on the recording medium. 4. The method according to claim 1, wherein a decoding process and a data decompression process are performed when the reproduced digital signal is compressed and encoded. A method for recording digital audio signals. 5. When generating an adjusted recording signal conforming to the standard of the recording medium, the reproduction signal is subjected to an encoding process and a compression encoding process, and the compression encoded digital audio signal is recorded on the recording medium. 4. The method for recording a digital audio signal according to claim 1, wherein the digital audio signal is recorded. 6. When generating an adjusted recording signal conforming to the standard of the recording medium, the reproduction signal is subjected to an encoding process and a compression encoding process, and a compression-encoded digital audio signal is recorded on the recording medium. 5. The method for recording a digital audio signal according to claim 4, wherein: 7. A maximum volume and a minimum volume of each voice are detected from stored volume information when determining a volume to be a reference when each voice is recorded on the recording medium, and a maximum volume of each voice is detected. The maximum sound volume and the minimum sound volume of the minimum sound volume of each sound are specified as a dynamic range, and this dynamic range becomes a reference when recording each sound on the recording medium. 3. The digital audio signal recording method according to claim 1, wherein the volume is determined as a volume. 8. When determining the dubbing order of audio to be recorded on the recording medium so that a change in volume is gradual,
Detecting the maximum volume or the minimum volume of each audio from the stored volume information, and determining the ascending or descending order of the maximum volume or the minimum volume of each audio as a dubbing order when recording the audio on the recording medium. The method for recording a digital audio signal according to claim 3, wherein: 9. When deciding a reference volume for recording each voice on the recording medium, an average volume of each voice is detected from the stored volume information, and an average of each voice is detected. 2. The method according to claim 1, wherein any one of the sound volumes or an average sound volume of each of the sound volumes is determined as a reference sound volume when each sound is recorded on the recording medium. 3. A method for recording a digital audio signal according to claim 2. 10. When deciding a volume to be a reference when recording each voice on said recording medium, an average volume of each voice is detected from stored volume information, and a predetermined specified value is determined. The average volume of each audio is adjusted so as to fall within the range, and the average volume of each adjusted audio is determined as a reference volume when each audio is recorded on the recording medium. 3. The method for recording a digital audio signal according to claim 1, wherein: 11. When deciding the dubbing order of voices to be recorded on said recording medium so that a change in volume is gradual, an average volume of each voice is detected from stored volume information, and each voice is detected. 4. The digital audio signal recording method according to claim 3, wherein the ascending or descending order of the respective average sound volumes is determined as the dubbing order when recording the audio on the recording medium. 12. When deciding a reference volume for recording each voice on the recording medium, the integrated volume information per unit time of each voice is detected from the stored volume information. Calculates the maximum integrated value volume per unit time and the minimum integrated value volume per unit time from the integrated value per unit time of, and the maximum integration of the maximum integrated value volume per unit time for each audio The value range and the minimum integrated value volume of the minimum integrated value volume per unit time of each sound are used to specify a dynamic range, and this dynamic range is used when recording each sound on the recording medium. 3. The method for recording a digital audio signal according to claim 1, wherein the volume is determined as a reference volume. 13. A method for determining a reference volume for recording each voice on the recording medium, detecting volume integrated value information per unit time of each voice from stored volume information, and determining each voice. Calculates the average integrated volume of each voice from the integrated value per unit time, and calculates any one of the average integrated volume of each voice or the average integrated volume of each voice. 3. The digital audio signal recording method according to claim 1, wherein the average integrated value volume is determined as a volume used as a reference when recording each audio on the recording medium. 14. A method for determining a reference sound volume for recording each sound on the recording medium, wherein the sound volume of each reproduction signal is continuously changed from a predetermined specified value from among the stored sound volume information. 14. The digital audio signal recording method according to claim 13, further comprising detecting volume integrated value information per unit time of each audio during a period of exceeding. 15. The volume of each reproduction signal is adjusted in consideration of volume reproduction information of a reproduction system of the recording medium when adjusting the volume of each reproduction signal according to the calculated volume. 1. A method for recording a digital audio signal according to claim 2. 16. The method according to claim 16, wherein after determining the dubbing order of the audio to be recorded on the recording medium, the volume of each reproduction signal is adjusted to a volume in accordance with the volume reproduction information of the reproduction system of the recording medium. The method for recording a digital audio signal according to claim 3. 17. A selection means for selecting a plurality of digitalized sounds to be recorded on a recording medium, and volume information obtained by detecting from a reproduced signal of each sound or performing an operation on the reproduced signal of each sound. Volume information detection means for obtaining the respective volume information, volume information storage means for storing the volume information, and determine a reference volume when recording each sound on the recording medium based on the stored volume information, Volume determination means for calculating the volume of each audio from each playback signal when each audio is recorded on the recording medium based on a reference volume; and volume adjustment for adjusting the volume of each playback signal according to the calculated volume. Means, and a recording signal generating means for generating an adjusted recording signal conforming to the standard of the recording medium from each adjusted reproduction signal, and at the time of audio reproduction of each audio recorded on the recording medium. Recording apparatus in a digital audio signal kicking volume characterized by dubbing to adjust the volume of each reproduction signal by the volume control means to be a constant. 18. A means for selecting a plurality of digitalized sounds to be recorded on a recording medium, and volume information obtained by detecting from a reproduced signal of each sound or performing an operation on the reproduced signal of each sound. Volume information detection means for respectively obtaining the volume information, volume information storage means for storing the volume information, the dubbing order when recording each sound in the recording medium based on the stored volume information, the change in volume is moderate. A digital audio signal recording apparatus, comprising: a dubbing order determining means for determining the dubbing order so as to perform dubbing according to the determined dubbing order. 19. An encoded data reading means for performing decoding processing and data decompression processing on a digital audio signal which has been compression-encoded, wherein an output signal of said encoded data reading means is used as a reproduction signal. Item 19. An apparatus for recording a digital audio signal according to any one of Items 17 and 18. 20. An encoded data generating means for performing an encoding process and a compression encoding process on a reproduced signal of each audio, and records a compression-encoded digital audio signal on the recording medium. 17. A recording apparatus for a digital audio signal according to claim 18. 21. An encoded data generating means for performing an encoding process and a compression encoding process on a reproduced signal of each audio, and records a compression-encoded digital audio signal on the recording medium. 20. The digital audio signal recording device according to claim 20.