JP3482203B1 - Reproduction device, generation device, reproduction method, generation method, and program - Google Patents

Abstract

A playback device and the like suitable for smoothly playing back audio data stored in two storage media are provided. SOLUTION: In a reproducing apparatus 201, a first reading section 2
11 reads the first independent audio data and the first transition audio data stored in the first storage medium 212, and reads the second transition audio data stored in the second storage medium 222 And the second single audio data,
The reproduction unit 231 reproduces the read first single audio data until a predetermined transition start time, and from the transition start time until a predetermined transition time elapses (hereinafter, referred to as a “transition end time”). The read first transition audio data and the second transition audio data are read out such that the reproduction volume of the first transition audio data gradually decreases and the reproduction volume of the second transition audio data gradually increases. Are reproduced at the same time, and the read second independent audio data is reproduced from the end of the transition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus suitable for smoothly reproducing audio data stored in two storage media, a reproducing method, and a generating apparatus suitable for generating audio data used for the reproducing apparatus. , A generation method, and a program for realizing these in a computer.

[0002]

2. Description of the Related Art Conventionally, in the field of game machines and the like, PCM (Puls) recorded on a CD (Compact Disc) has been used.
e Code Modulation) data, hard disk or CD-
ROM (CD Read Only Memory) and DVD-ROM (Dig
Various audio data (ADPCM format, MP3 format, WAV format, Ogg Vorbis format, etc.) recorded in ital Versatile Disc ROM) as well as MIDI (Musical Instrument
nt Digital Interface) Performance instruction data based on the standards. ) A technique of playing back and outputting various sounds and music is used.

[0003]

However, since it takes a certain amount of time to read data from a hard disk, a CD-ROM drive, a DVD-ROM drive, etc., it is actually necessary to start the reproduction of such audio data. There was a problem that there was a time lag before playback started.

In order to reduce such a time lag, a RAM (Ra which can read these audio data at high speed can be used.
A method of preparing in advance in the ndom access memory) can be considered, but when the capacity of the RAM is small, there is a problem that it is difficult to place the high-quality sound data in the RAM as it is.

Therefore, different audio data recorded in a storage medium mounted on a hard disk, a CD-ROM drive, a DVD-ROM drive or the like and audio data arranged in the RAM are prepared and smoothed. If it is reproduced, it is considered that the time lag can be reduced from when the reproduction is started to when the reproduction is actually started.

The present invention is a reproducing apparatus and a reproducing method suitable for smoothly reproducing the audio data stored in the two storage media, and a generating apparatus and a generating method suitable for generating the audio data used for the reproducing apparatus and the reproducing method. Also, the present invention relates to a program for realizing these with a computer.

[0007]

In order to achieve the above object, the following invention is disclosed according to the principle of the present invention.

A reproducing apparatus according to a first aspect of the present invention comprises a first reading section, a second reading section, and a reproducing section, and is configured as follows.

First, the first reading section stores the first independent voice data stored in the first storage medium, the first transition voice data, and
Read out. Typically, the first storage medium is RA
It is desirable to use a medium such as M that takes a short time to start reading. In general, a medium that can be read at high speed has a small capacity, so that the sound quality of the first independent audio data and the first transition audio data is low.

On the other hand, the second reading section reads the second independent audio data stored in the second storage medium. Typically, the second storage medium is a hard disk, a CD-ROM,
It is desirable to use a medium having a large capacity such as a DVD-ROM even if it takes a long time to start reading.
That is, the sound quality of the second single audio data is higher than that of the first single audio data or the first transition audio data.

The audio data stored in the first storage medium may be the audio data stored in the second storage medium which has been read in advance. That is, the first independent audio data stored in the hard disk, the CD-ROM, the DVD-ROM, etc., the first transition audio data,
It is possible to adopt a form in which the data is read out to the RAM in advance.

Further, the reproducing section reproduces the read first single audio data until a predetermined transition start time point, and a predetermined transition time elapses from the transition start time point (hereinafter referred to as "transition end time point"). That is, the read first transition audio data is reproduced, and the read second single audio data is reproduced from the end point of the transition. That is, the reproducing unit is configured to generate the first independent voice data, the first transition voice data, the second
The audio data will be reproduced in the order of the independent audio data.

According to the present invention, the first storage medium and the second storage medium are selected according to their characteristics, suitable audio data is recorded in them, and the audio data recorded in the second storage medium is recorded. Even if it takes a long time to start reading, the audio data recorded in the first storage medium can be reproduced during that time.

In particular, when the reproducing apparatus of the present invention requests the first reading section and the second reading section to read the audio data, the first reading section converts the audio data into the first independent audio data. Subsequently, the time point at which the first transition audio data is read out and the readout of the first transition audio data is started is before the transition start time point, and the time point at which the readout of the second single audio data is started is It can be configured to be before the end of the transition.

According to the present invention, the first storage medium and the second storage medium are selected according to their characteristics, suitable audio data is recorded in them, and the audio data recorded in the second storage medium is selected. Even if it takes time to start reading, by reproducing the audio data recorded in the first storage medium during that time, the time lag from when the audio data is tried to be reproduced to when the reproduction is actually started is reduced. The audio data stored in the two storage media can be smoothly reproduced.

Further, the reproducing apparatus of the present invention can be configured as follows. That is, the second reading unit is
The second transition audio data stored in the storage medium is further read, and the reproducing unit reads the first transition audio data and the read second transition audio from the transition start point to the transition end point. Data and are played back at the same time. The first transition audio data and the second transition audio data are audio data having a complementary relationship, and by reproducing these simultaneously, the reproduction of the first independent audio data and the reproduction of the second independent audio data are performed. Smoothly connect between playback and playback.

In particular, when the reproducing apparatus of the present invention requests the first reading unit and the second reading unit to read the audio data, the second reading unit converts the audio data into the second transition audio data. Then, the time point at which the second single-voice data is read out and the second transitional voice data is started is after the first read-out point of the first independent voice data, and before the transition start time point. Can be configured as is.

According to the present invention, the first single voice data,
The first that smoothly connects the second independent voice data and
By preparing the transition voice data and the second transition voice data in advance, the voice data recorded in the two storage media can be sequentially and smoothly reproduced.

Further, in the reproducing apparatus of the present invention, the reproducing section can be configured to repeatedly reproduce the first single audio data until the transition start time. That is, by repeating the reproduction of the first independent audio data, the system waits until the audio data is ready to be read from the second storage medium. Since the point of time when the reading of the audio data from the second storage medium is started before the point of starting the shift, the point of time when the reading of the voice data from the second storage medium is started may be set to the point of the shift start. The transition start time may be a time point at which the reproduction of the first single audio data, which is being reproduced at the time when the reading of the audio data from the two storage media is started, reaches the end.

According to the present invention, the time required for the preparation can be filled by repeatedly reproducing the first single audio data until the audio data is ready to be read from the second storage medium. For example, it is effective for absorbing individual differences due to the effects of dirt, scratches, reading errors, etc. on the device used for the second reading unit and the second storage medium such as CD-ROM and DVD-ROM.

Further, in the reproducing apparatus of the present invention, the reproducing unit gradually decreases the volume of reproducing the first transition audio data from the transition start point to the transition end point, and reproduces the second transition audio data. The volume to be played can be configured to gradually increase. The so-called crossfade technique smoothly connects the reproduction of the first independent audio data to the reproduction of the second independent audio data.

Particularly, in the reproducing apparatus of the present invention, the reproducing section, from the transition start point to the transition end point, outputs the first transition audio data, the second transition audio data,
Can be mixed so that the volume for reproducing the latter with respect to the volume for reproducing the former is gradually increased, so that the volume for reproducing the former is gradually decreased and the volume for reproducing the latter is gradually increased.

That is, the first transition voice data itself may gradually decrease the volume and the second transition voice data itself may gradually increase the volume, or the first transition voice data or the second transition voice. It is also possible to realize the crossfade by adjusting the mixing ratio in the mixing process of the audio data without actively changing the volume of the data itself.

According to the present invention, it is possible to smoothly connect the reproduction of the first independent audio data to the reproduction of the second independent audio data by a so-called crossfade method.

Further, the reproducing apparatus of the present invention can be configured as follows. That is, the first transition audio data is performance instruction data for instructing the performance of a plurality of electronic musical instruments included in the reproducing unit, and is performance instruction data for instructing to gradually decrease the number of electronic musical instruments simultaneously played. is there. For example, MI that plays multiple electronic musical instruments.
DI data can be adopted as such performance instruction data. According to the MIDI data, it is possible to specify an electronic musical instrument such as a piano, a guitar, a bass or a drum, and reproduce the sounds assigned to these electronic musical instruments.

On the other hand, the second transition voice data is tone color record data for recording a plurality of tone colors associated with the plurality of electronic musical instruments. If it corresponds to the above example, it is possible to employ as the voice recording data a tone color obtained by actually playing a piano, a guitar, a bass, a drum, etc., recorded in a high sound quality format such as PCM.

When the reproducing section finishes the performance of the electronic musical instrument by the instruction of the performance instruction data, the reproduction of the tone color associated with the electronic musical instrument by the tone color recording data is started. If you correspond to the above example, MIDI
The first transition voice data so that the time when the piano performance based on the data ends and the time when the voice recording data of the piano starts to be reproduced at the same time, and that the same holds true for other musical instruments. And the second transition audio data are prepared and reproduced by the reproducing unit.

According to the present invention, for example, for each musical instrument, M
It is possible to transfer the reproduction method from the IDI data or the like to the PCM data or the like, and naturally, the reproduction of the first single audio data based on MIDI data and the reproduction of the second single audio data based on PCM data are performed. Will be able to connect smoothly.

The reproducing apparatus of the present invention can be constructed as follows. That is, the first transition audio data is performance instruction data for instructing the performance of a plurality of electronic musical instruments included in the reproduction unit. For example, MIDI data for playing a plurality of electronic musical instruments can be adopted as such performance instruction data. According to the MIDI data, it is possible to specify an electronic musical instrument such as a piano, a guitar, a bass or a drum, and reproduce the sounds assigned to these electronic musical instruments.

On the other hand, the reproducing section gradually decreases the number of electronic musical instruments to be played among the plurality of electronic musical instruments from the transition start time point to the transition end time point, regardless of the performance instruction data. In the above example, even if all of the piano, guitar, bass and drums are played from the beginning to the end on the MIDI data of the first transition audio data, the number is forcibly reduced.

According to the present invention, for example, the same data as the first single voice data can be adopted without the need to prepare the first transition voice data, and when the present invention is combined with the above invention. Is M over time
As the number of musical instruments from the IDI performance to the PCM performance increases, it becomes possible to smoothly connect the reproduction from the first independent audio data to the second independent audio data.

A generating apparatus according to another aspect of the present invention comprises an input receiving unit, a transition voice data generating unit, and a residual voice data generating unit, and is configured as follows. That is, the input receiving unit receives the input of the basic voice data. The basic voice data is an original song of the second transition voice data and the second independent voice data, and it is desirable to adopt the voice data of high sound quality.

On the other hand, the transition voice data generation unit determines the number of sampling stages, the sampling frequency, and the predetermined transition time from the beginning of the basic voice data that has been input.
Of the audio data obtained by sampling so that at least one of the two becomes larger as transition audio data. As described above, in the audio data obtained by sampling, so-called pink noise is gradually changed to the audio data of the original music with high sound quality. Further, the residual voice data generation unit generates residual voice data, which is obtained by removing the predetermined transition time from the beginning of the basic voice data that has been input, as residual voice data.

According to the present invention, it is possible to obtain the audio data that can be used by the above reproducing apparatus from the generated transition audio data and residual audio data. For example, the performance instruction data that causes pink noise is the first independent voice data and the first transitional voice data, and the one that connects the transitional voice data and the residual voice data is the second independent voice data. It is possible to smoothly reproduce the voice data, the first transition voice data, and the second independent voice data.

A generating apparatus according to another aspect of the present invention comprises an input receiving unit and a transition voice data generating unit, and is configured as follows. That is, the input receiving unit receives the input of the basic voice data. The basic voice data is an original song of the second transition voice data and the second independent voice data, and it is desirable to adopt the voice data of high sound quality.

On the other hand, the transition voice data generation unit obtains the leading frequency component of the input basic voice data, selects one of the frequency components, and outputs the selected frequency component. Those that gradually increase in number are generated as the transition voice data. The transition audio data generated in this manner is audio data that smoothly changes from the audio having the initially selected frequency component as the fundamental frequency to the audio of the original song.

According to the present invention, it is possible to obtain the audio data that can be used in the above reproducing apparatus from the generated transition audio data. For example, the transition voice data is the second transition voice data, the basic voice data is the second single voice data, the performance instruction data for generating white noise is the first single voice data, and the white is the first transition voice data. If the performance instruction data that specifies the filtering process that gradually removes each frequency component so as to leave the frequency component of the fundamental frequency from noise is adopted, the first independent voice data to the second independent voice data can be smoothly processed. You will be able to play.

A reproducing method according to another aspect of the present invention is a first method.
The reading process, the second reading process, and the reproducing process are provided and configured as follows. That is, in the first reading step, the first single voice data and the first transition voice data stored in the first storage medium are read. On the other hand, in the second reading step, the second independent audio data stored in the second storage medium is read.

Further, in the reproducing step, the read first single audio data is reproduced until a predetermined transition start time point, and a predetermined transition time elapses from the transition start time point (hereinafter, "transition end time point"). The read first transition audio data is reproduced until the end of the transition,
The read second single voice data is reproduced.

A generation method according to another aspect of the present invention comprises an input reception step, a transition voice data generation step, and a residual voice data generation step, and is configured as follows. That is, in the input receiving step, the input of the basic voice data is received. On the other hand, in the transition voice data generation step, the transition voice data is obtained by sampling a predetermined transition time from the beginning of the input basic voice data such that at least one of the number of sampling stages and the sampling frequency is gradually increased. The voice data is generated as the transition voice data. Further, in the residual voice data generation step, residual voice data obtained by removing the predetermined transition time from the beginning of the basic voice data that has been input is generated as residual voice data.

A generation method according to another aspect of the present invention comprises an input reception step and a transition voice data generation step, and is configured as follows. That is, in the input receiving step, the input of the basic voice data is received. On the other hand, in the transition audio data generation step, the leading frequency component of the input basic audio data is obtained, and one of the selected frequency components is selected, and the number of selected frequency components gradually increases. The increased number is generated as the transition voice data.

A program according to another aspect of the present invention causes a computer to function as the reproducing device or the generating device, or causes the computer to execute the displaying method or the generating method. In addition, the program of the present invention is a compact disk, a flexible disk, a hard disk, a magneto-optical disk,
It can be recorded on a computer-readable information storage medium such as a digital video disk, a magnetic tape, and a semiconductor memory. The above program can be distributed / sold via a computer communication network independently of the computer on which the program is executed. The information storage medium can be distributed and sold independently of the computer.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. Hereinafter, for ease of understanding, an embodiment in which the present invention is applied to a game device will be described, but the present invention is similarly applied to information processing devices such as various computers, PDAs (Personal Data Assistants), and mobile phones. Can be applied. That is, the embodiments described below are for the purpose of explanation, and do not limit the scope of the present invention. Therefore, a person skilled in the art can adopt an embodiment in which each of these elements or all the elements are replaced by equivalents thereof, but these embodiments are also included in the scope of the present invention.

(Embodiment of the Invention) FIG. 1 is a schematic diagram showing a schematic configuration of a typical game machine in which a reproducing apparatus according to one of the embodiments of the present invention is realized. Hereinafter, description will be given with reference to this figure.

The game device 100 has a CPU (Central Pr
cessing unit) 101, ROM 102, RAM
103, an interface 104, and a controller 1
05, the external memory 106, the image processing unit 107, and D
VD-ROM drive 108 and NIC (Network Inte
rface card) 109, and.

By mounting the DVD-ROM storing the game program and data in the DVD-ROM drive 108 and turning on the power of the game apparatus 100, the program is executed and the reproducing apparatus of the present embodiment is realized. To be done. The CPU 101 controls the overall operation of the game device 100 and is connected to each component to exchange control signals and data.

In the ROM 102, an IPL (Initial Program Loader) executed immediately after the power is turned on is recorded,
By executing this, the program recorded in the DVD-ROM is read out to the RAM 103 and the CPU
The execution by 101 is started. Also, the ROM 102
The operating system programs and various data necessary for controlling the operation of the entire game device 100 are recorded in the.

The RAM 103 is for temporarily storing data and programs, and holds the programs and data read from the DVD-ROM and other data necessary for game progress and chat communication. The controller 105 connected via the interface 104 is
An operation input made by a user when executing a game is accepted.

The external memory 106, which is detachably connected via the interface 104, rewritably stores data indicating a game progress state, chat communication log (record) data, and the like. The user can appropriately record these data in the external memory 106 by inputting an instruction via the controller 105.

A DVD-ROM mounted on the DVD-ROM drive 108 stores a program for realizing the game and image data and audio data accompanying the game. The DVD-RO is controlled by the CPU 101.
The M drive 108 is a DVD-ROM mounted in this
Are read out to read out necessary programs and data, and these are temporarily stored in the RAM 103 or the like. In particular, in this embodiment, the DVD-ROM stores MIDI data and noise generation parameters and PCM data, and the MIDI data and noise generation parameters are stored in the RAM in advance by executing the program of the game device. It is copied to a predetermined area of 103.

The image processing unit 107 receives the data read from the DVD-ROM from the CPU 101 and the image processing unit 10.
After being processed by an image calculation processor (not shown) included in the image processing unit 7, it is recorded in a frame memory (not shown) included in the image processing unit 107. The image information recorded in the frame memory is converted into a video signal at a predetermined synchronization timing and output to a monitor (not shown) connected to the image processing unit 107. This enables various image displays.

The image operation processor can execute overlay operation of two-dimensional images, transparent operation such as α blending, and various saturation operations at high speed. In addition, polygon information arranged in a virtual three-dimensional space and to which various types of texture information are added is rendered by the Z buffer method, and a rendering image obtained by looking down at the polygons arranged in the virtual three-dimensional space from a predetermined viewpoint position is obtained. High-speed execution of the obtained operation is also possible. In particular, the function of calculating the degree to which a polygon is illuminated by a typical (positive) light source such as a point light source, a parallel light source, or a conical light source is made into a library or hardware to enable high-speed calculation.

Further, the CPU 101 and the image operation processor cooperate with each other to draw a character string as a two-dimensional image in the frame memory or on each polygon surface according to the font information defining the shape of the character. Is possible. Font information is stored in ROM 103
However, it is also possible to use the dedicated font information recorded in the DVD-ROM.

The NIC 109 is for connecting the game apparatus 100 to a computer communication network (not shown) such as the Internet, and is a LAN (Local Area Network).
10BASE-T / 10 used in constructing k)
Those that comply with the 0BASE-T standard, analog modems for connecting to the Internet using a telephone line, I
SDN (Integrated Services Digital Network) modem, ADSL (Asymmetric Digital Subscriber Line M)
odem) modem, a cable modem for connecting to the Internet using a cable television line, and an interface (not shown) for mediating between these and the CPU 101.

The audio processing unit 110 receives the PCM data read from the DVD-ROM, the MIDI data read from the RAM 103, and the PCM obtained from the noise generation parameter.
After mixing with data, it is converted into an analog audio signal and output from a speaker (not shown) connected thereto. Further, under the control of the CPU 101, it generates sound effects and music data to be generated during the progress of the game,
The corresponding voice is output from the speaker.

In addition, the game device 100 uses a large-capacity external storage device such as a hard disk to store the ROM 10
2, RAM 103, external memory 106, DVD-RO
It may be configured to perform the same function as a DVD-ROM or the like mounted in the M drive 108.

(Embodiment of Reproducing Device) FIG. 2 is a schematic diagram showing a schematic configuration of a reproducing device according to one embodiment of the present invention. Hereinafter, description will be given with reference to this figure. The reproducing apparatus 201 according to the present embodiment includes a first reading unit 211 and a second reading unit 2.
21 and a reproducing unit 231.

First, the first reading section 211 reads the first independent voice data and the first transition voice data stored in the first storage medium 212. In the present embodiment, a noise generation parameter for generating what is called white noise (white noise) or pink noise (1 / f noise) as the first independent voice data is adopted. Also, as the first transition audio data, audio data with a reproduction time of 0 is adopted.

The noise generation parameter is used as a seed of the recurrence formula for generating a random number, and the result of this recurrence formula is used as noise, or the noise generation parameter is supplied to a noise generation circuit prepared in advance in the game device. By giving a PCM representation of these noises can be obtained.

In this embodiment, the RAM 103 is adopted as the first storage medium 212. The noise generation parameter is
Initially recorded on the DVD-ROM, it is copied to the RAM 103 in advance by executing the program.

On the other hand, the second reading section 221 reads the second independent audio data stored in the second storage medium 222. In this embodiment, the DVD-R is used as the second storage medium 222.
Adopt OM. Therefore, the DVD-ROM drive 108 functions as the second reading unit 221.

On the DVD-ROM drive, PCM format data, WAV format data, MP3 format data, and Ogg Vorbis format are recorded as the second independent audio data. A PCM expression can be obtained from these audio data by a known technique.

FIG. 3 shows a time-series display of data exchange and reproduction among the first reading unit 211, the second reading unit 221, and the reproducing unit 231 in the present embodiment. It is a figure. In this figure, time flows from top to bottom. Hereinafter, description will be given with reference to this figure as well.

First, the reproducing section 231 includes the first reading section 211.
Then, a read request for audio data is issued to the second reading unit 221 (301). The first reading unit 211 is the RAM 10
Since it is composed of 3, the reading of the first single audio data is immediately started (302). Therefore, the reproducing unit 231
Repeatedly plays the first independent voice data until the reading of the second independent voice data can be started (30
3).

After the reading of the second independent audio data is started (304), the reproduction of the first transitional audio data is started when the reproduction of the first independent audio data of the playing time at that time is completed (305). ). Generally, the reading of the first transition audio data is performed after the reading of the first independent audio data (307). Then, when the reproduction of the first transition audio data is completed, the reproduction of the second independent audio data is started (306). The time at which the reproduction of the first transition audio data is started is the "transition start time", and the end is the "transition end time".

However, in the present embodiment, since the voice data of the reproduction time 0 is adopted as the first transition voice data, the transition start time point and the transition end time point coincide with each other, and the reproduction of the first independent voice data ends. Immediately after that, the reproduction of the second independent audio data is started.

In the present embodiment, immediately after the reproduction of the first independent voice data (noise) ends, the second independent voice data (P
Playback of CM data) is started. Therefore, it is desirable to prepare in advance data that causes natural transition from noise to music as the second single voice data.
A method for generating such second single voice data will be described below.

(Embodiment of Generating Device) FIG. 4 is a schematic diagram showing a schematic configuration of a generating device for generating audio data that can be used in the reproducing device of the above embodiment. Figure 5
3 is a flowchart showing a flow of processing executed in the generation device. Hereinafter, description will be given with reference to these drawings. The generation device of the present embodiment can be realized on a computer capable of processing audio data. Such a computer has the same general configuration as the game device 100 shown in FIG. Since various devices such as an input device, an analog / digital conversion device, and a sound source device for obtaining a voice from music performance data are further added, description thereof will be omitted.

The generation device 401 according to the present embodiment comprises an input reception unit 402, a transition voice data generation unit 403, and a residual voice data generation unit 404.

The input receiving unit 402 receives input of basic voice data (step S501). It is desirable to adopt high-quality audio data as the basic audio data. Typically, audio data in PCM format prepared in advance is used. Then, since the transition voice is generated from the predetermined transition time T at the beginning of the audio data, the music of the transition time is a portion corresponding to a so-called intro (duction), and the main melody of the music is It is desirable to use audio data that starts from the time when the transition time has passed.

The transition voice data generation unit 403 sets the current number of repetitions i to 0 in order to execute the repetitive processing from now on (step S502). The number of repetitions
i may be stored in a RAM, a register, or the like included in the computer. The same applies to other constants such as n, variables that appear later, and constants.

Then, the predetermined number of times n is compared with i (step S503), and if i <n (step S503; Yes), the processes of step S504 and thereafter are executed. First, an audio data fragment for a time obtained by dividing the transition time by the number of times is acquired from the beginning of the unprocessed part of the audio data (step S504). That is, as viewed from the start of the basic voice data, the data fragment corresponding to time iT / n to time (i + 1) T / n is acquired.

Then, the number of sampling stages and the sampling frequency which are associated in advance with the current number of repetitions i are acquired (step S505). PC for CD
The number of sampling stages of M data is 16 bits = 655
Since there are 36 stages and the sampling frequency is 44100 Hz, this will be described as an example.

The “number of sampling stages” will be described in more detail. As described above, the PCM data for CD has a waveform of 0 to 65535 (or -3 in the amplitude direction).
Although 2768 to 32767, in the following, in order to facilitate understanding, unsigned integers will be considered. ) 6
Express in 5536 steps. That is, this is equivalent to sampling the analog waveform with the number of sampling stages of 65536.

When such PCM data is sampled at the sampling stage number 4, the waveform is 0 to 3
Will be expressed by the numerical value of. In this case, the correspondence relationship between the number of sampling stages 65536 (16-bit sampling) and the number of sampling stages 4 is as follows.
In addition, in the following integer calculation, truncation is performed as appropriate. 65536 × i / 4 ~ 65536 × (i + 1) / 4-1 → i

On the contrary, in order to return the value i of the sampling stage number 4 to the sampling stage number 65536, the following may be done, for example. i → 65536 × (i + 1/2) / 4

Similarly, the number of sampling stages 655
The correspondence between 36 and the number of sampling steps s is 65536 × i / s to 65536 × i / s-1 → i i → 65536 × (i + 1/2) / s. The constant part may be changed to another value as appropriate.

In the present embodiment, the following correspondence can be considered.

(1) Number of sampling steps s which is approximately proportional to i
And the sampling frequency f is adopted. For example, s = 2 +
Something like 65536i / n, f = 1 + 44100i / n etc. can be adopted.

(2) The number of sampling steps s and the sampling frequency f are determined beforehand for i = 0 to i = n-1. In this case, it is desirable that at least one of s and f be increased when i is increased, and that s and f be non-decreased with respect to i.

(I) Regarding the number of sampling stages, initially the number of sampling stages is gradually increased from 1 bit sampling (2 stages) to a bit sampling (2 ^a stages), but after that (a + 1) For bit sampling to 16-bit sampling, a method in which a power of 2 is used can be considered. in this case,
The number of sampling steps s is “2, 3, 4, 5, ..., 2 ^a -1, 2
^a , 2 ^{a + 1} , 2 ^{a + 2} , ..., 32768, 65536 ”.

(Ii) Regarding the sampling frequency,
The method of (1) above may be adopted, or when (i) above is adopted, a method substantially proportional to s may be adopted. It is also possible to select a sampling frequency that increases exponentially, such as f = 44100 × (1/2) ⁿⁱ .

The obtained audio data fragment is sampled at the sampling step number s and the sampling frequency f thus obtained (step S506). And
The sampling result is output as transition voice data (step S507). After that, the value of i is updated (step S508), and the process returns to step S503.

On the other hand, after the processing is repeated a predetermined number of times n (step S503; No), the portion of the basic voice data after the time T from the start is output as residual voice data (step S509), and the main voice data is output. The process ends.

Now, the reproducing apparatus 201 according to the above embodiment.
The second single voice data used in step S is
The transition audio data sequentially output at 507 and the residual audio data output at step S509 are connected. In the audio data obtained by performing the sampling in this way, so-called pink noise gradually changes into basic audio data of the original music with high sound quality. Therefore, if the reproducing device 201 adopts the parameter for generating the pink noise in the first single audio data, if the second single audio data is reproduced after the first single audio data, it takes time T, The reproduced sound changes smoothly from noise to the original song.

In the above embodiment, as the first transition audio data, the same data as the first single audio data (or the data repeated a predetermined number of times) is adopted.
It That is, the first independent voice data and the first transition
The audio data has parameters for generating pink noise.
The first reading unit 211 of the playback device 201 is
The parameter is read from the first recording medium, and the reproducing unit 23
1 generates a pink noise sound from the parameter.
Then, the reading of the parameter from the first reading unit 211 can be performed.
The pink noise from the start to the end of the transition
Play the sound. Then, in step S507,
Transition voice data to be output and in step S509
The one that connects with the residual audio data that is output is the second single
This is German voice data. That is, the generator 401 is
A transfer to create the second independent voice data from this voice data
To generate line speech data and residual speech data.
It First single voice data, first transition sound taken up here
If the voice data and the second independent voice data are used, they are shown in Fig. 3.
It becomes possible to perform such playback, and if the playback is executed,
Pink noise is being played at the beginning, but at the end of the transition
After passing, until the time T has passed, Pinko
A voice that changes smoothly from the voice to the basic voice data (No.
Part of 2 independent voice data that corresponds to the transition voice data
Minutes) are played, and after the time T has elapsed, the basic audio data
The same voice as the data (of the second single voice data, the residual voice
The portion corresponding to the data) will be reproduced.

(Other Embodiments of Reproducing Apparatus) In this embodiment, the second storage medium 222 is further provided with second transition audio data. FIG. 6 is an explanatory diagram showing in time series how data is exchanged and reproduced among the first reading unit 211, the second reading unit 221, and the reproducing unit 231 in the present embodiment. . Hereinafter, description will be given with reference to this figure.

First of all, the reproducing section 231 includes the first reading section 211.
Then, a read request for audio data is issued to the second reading unit 221 (601). The first reading unit 211 is the RAM 10
Since it is composed of 3, the reading of the first single audio data is immediately started (602). Therefore, the reproducing unit 231
Repeats the first single voice data until the reading of the second transition voice data can be started (60
3). Generally, the first transition audio data is read (604) before the reading of the second transition audio data can be started.

After the reading of the second transition audio data is started (605), when the reproduction of the first single voice data of the time playing at that time is completed, the first transition audio data and the second transition audio data are reproduced.
Simultaneous reproduction of the transition audio data is started (606).
Generally, the reading of the second independent audio data can be started during the simultaneous reproduction (607). And
When these reproductions are completed, reproduction of the second independent audio data is started (608). The point at which simultaneous playback is started is the "transition start point", and the end point is the "transition end point"
Is.

The present embodiment is different from the above embodiment in that the simultaneous reproduction of the first transition audio data and the second transition audio data is performed. Hereinafter, various techniques of this simultaneous reproduction will be described. In order to facilitate understanding, in the following description, MIDI data or the like is adopted for the first single voice data and the first transition voice data, and PCM data or the like is used for the second transition voice data and the second single voice data. Consider the case of adopting.

FIG. 7 is an explanatory diagram showing the state of the reproduction volume when the audio data is reproduced. The vertical axis represents the passage of time, and the width of the horizontal band represents the reproduction volume. Initially first
Although the single audio data is being reproduced, the reproduction of the first transition audio data is started at the transition start point. However, the reproduction volume of the first transition audio data gradually decreases. On the other hand, the reproduction volume of the second transition audio data gradually increases so as to interpolate it. Simultaneous playback by so-called crossfade. Then, when the transition end time comes, the second independent audio data is reproduced. The crossfade method will be described below.

(A) The simplest method of realizing the crossfade is to deal with the voice data side. Since there is a command for specifying the reproduction volume in MIDI data, it is possible to specify that the reproduction volume decreases with time by using this command. On the other hand, P
As for the CM data, it is sufficient to prepare such data that the volume gradually increases.

(B) The same method as in (a) above,
This is a method in which correspondence between musical instruments is obtained in advance between MIDI data and PCM data. FIG. 8 is an explanatory diagram showing a method in the case of performing the transition for each musical instrument and changing the transition time for each musical instrument during the crossfade.
In FIG. 8A, pianos, guitars, basses, and drums are shown as musical instruments, and these four are initially MIDI.
The performance is performed, but this is sequentially changed to PCM data. 8 (b) and 8 (c) have the same musical instrument, but MID
When the I performance is changed to the reproduction of PCM data, crossfading is further performed for each musical instrument.

(C) On the other hand, in today's digital audio processing chips such as the audio processing unit 110 of the game apparatus 100, it is often the case that mixing processing of audio by MIDI data and audio by PCM data is prepared in advance. In such a case, the mixing ratio of mixing should be
The crossfade may be realized by gradually shifting from MIDI data to PCM data. In this case, it is not necessary to previously specify the change in volume in MIDI data or PCM data.

Depending on the game, PCM data or MID
Some have a BGM playing mode in which I data can be played. When methods (a) and (b) are adopted, it is necessary to prepare audio data for BGM performance different from data for crossfading, but when method (c) is adopted, BGM performance is reproduced. There is an advantage that it is not necessary to separately prepare the voice data for.

In the above description, MIDI data and PCM
Although data has been described as an example, various data formats can be adopted for all of them. For example, in the first storage medium and the second storage medium,
Even when data of the same format is stored, the present invention can be applied and the audio data stored in the first storage medium is used for a short time to save the use area, while the second storage medium is stored. By smoothly transitioning to the voice data stored in, it is possible to reduce the time lag until the start of performance.

(Other Embodiments) In this embodiment, unlike the above embodiment, data for reproducing white noise is adopted as the first independent audio data. First, as the first transition audio data, data for transition from white noise to a sound with a predetermined waveform is adopted, and as second independent voice data, data for transition from a sound with a predetermined waveform to an original song is adopted. Think about when you don't.

A generator is used to obtain a sound of a predetermined waveform from the original song. FIG. 9 is an explanatory diagram illustrating a schematic configuration of the generation device according to the present embodiment. FIG. 10 is a flowchart showing the flow of processing executed in the generation device of this embodiment. Hereinafter, description will be given with reference to these drawings.

The generation device 401 includes an input reception unit 402,
And a transition voice data generation unit 403. First, the input receiving unit 402 receives input of basic voice data (step S901). The basic voice data is an original song of the second transition voice data and the second independent voice data, and it is desirable to adopt the voice data of high sound quality.

On the other hand, the transition voice data generation unit 403 acquires the head voice data fragment of the basic voice data of which the input is accepted (step S902). Then, this is subjected to fast Fourier transform to obtain each frequency component (step S903). The number of frequency components by Fourier transform is N
And Then, the number of repetitions i is initialized to 1 (step S904), and i is compared with N (step S90).
5) If i ≦ N (step S905; Yes), the process proceeds to step S906.

First, from the N frequency components, the highest i-th magnitude is selected (step S906), and only the selected frequency components are inverse-Fourier-transformed to obtain transition voice data (step S907). , Is output for a predetermined length of time (step S908). Then, the value of i is updated (step S909), and the process returns to step S905. On the other hand, if i ≦ N is not satisfied (step S905; N)
o), this processing is ended.

In this way, the transitional audio data sequentially output in step S908 is audio data that smoothly changes from the audio having the initially selected frequency component as the fundamental frequency to the audio of the original song. is there.

In the above control, the frequency components are increased by one by selecting the top i-th, but this number may be changed as appropriate. Further, according to the above process, the volume of the transition audio data output in step S908 gradually increases, but a filter process may be performed to correct this volume to a constant volume. Further, the “predetermined time length” in step S908 may be constant or may be changed depending on the repeating stage, for example, gradually shortening or gradually increasing.

In the present embodiment, the voice data obtained by connecting the transition voice data thus obtained and the basic voice data of the original song is adopted as the second independent voice data. On the other hand, as the first transition audio data, the data to be subjected to the filter processing so as to transit from white noise to “the sound of the frequency of the first highest frequency component after the Fourier transform” is adopted. Such a filtering process can be realized by applying a window function band-pass filter in which the pass band gradually narrows to the frequency concerned, to the white noise.

As described above, if each voice data is prepared,
It is possible to reproduce the sound with a smooth transition from the white noise to the sound data of the original song. It should be noted that the obtained transition voice data is used as the second transition voice data, the basic voice data of the original song is used as the second independent voice data, and the white noise is changed to “the sound of the frequency of the first highest frequency component after Fourier transform” It is also possible to adopt an embodiment in which the data to be subjected to the filter processing for transition is the first transition audio data and the crossfade from the first transition audio data to the second transition audio data is performed.

[0106]

As described above, according to the present invention,
A reproducing apparatus suitable for smoothly reproducing the audio data stored in the two storage media, a reproducing method, a generating apparatus suitable for generating the audio data used for the reproducing apparatus, a generating method, and a computer for executing these. A program to be realized can be provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a schematic configuration of a typical game device in which a reproducing device according to an embodiment of the present invention is realized.

FIG. 2 is a schematic diagram showing a schematic configuration of a reproducing apparatus according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing in time series how data is exchanged and reproduced among a first reading unit, a second reading unit, and a reproducing unit.

FIG. 4 is a schematic diagram showing a schematic configuration of a generation device that generates audio data that can be used in the reproduction device of the present invention.

FIG. 5 is a flowchart showing a flow of processing executed in the generation device.

FIG. 6 is an explanatory diagram showing, in chronological order, how data is exchanged and reproduced among the first reading unit, the second reading unit, and the reproducing unit.

FIG. 7 is an explanatory diagram showing a state of a reproduction volume when audio data is reproduced.

FIG. 8 is an explanatory diagram showing a method in which a transition is made for each musical instrument and a transition time is changed for each musical instrument during a crossfade.

FIG. 9 is a schematic diagram showing a schematic configuration of a generation device that generates audio data that can be used in the reproduction device of the present invention.

FIG. 10 is a flowchart showing a flow of processing executed in the generation device.

[Explanation of symbols]

100 game machines 101 CPU 102 ROM 103 RAM 104 interface 105 controller 106 external memory 107 image processing unit 108 DVD-ROM drive 109 NIC 110 voice processing unit 201 playback device 211 First reading unit 212 First Storage Medium 221 Second reading unit 222 Second storage medium 231 Playback unit 401 generator 402 Input reception unit 403 Transition voice data generation unit 404 Residual voice data generation unit

Claims (14)

(57) [Claims] And 1. A playback unit, a read request from said reproducing unit, a first single audio data stored in the first storage medium, the first reading section for reading the first transition audio data, in sequence, the A second reading unit for reading the second independent audio data stored in the second storage medium in response to a read request from the reproducing unit.
And a reproducing device including:
Section and the second reading section were simultaneously requested to read.
In the case of the second single voice data
The time when the reading is started is before the first reading unit.
After the time when the reading of the first transition voice is started
Ri, the playback unit, (a) and the first reading section, to said second reading unit, at the same time
A read request is made, and (b) the first read unit reads the first independent audio data.
When the output starts, the read first single audio data
Is repeatedly reproduced until a predetermined transition start time point, and (c) a predetermined transition time elapses from the transition start time point.
Until the time point (hereinafter referred to as “end point of transition”).
1 Playback the first transition audio data read by the reading unit
And (d) read by the second reading unit from the end of the transition.
The extracted second single voice data is reproduced, and the transition start time is set to "Read the first transition voice data.
The output starts and the reading of the second independent audio data
After the start of the
It is "the point when one unit of the repetitive reproduction is finished" . 2. The reproducing apparatus according to claim 1, wherein the second reading unit receives a read request from the reproducing unit.
Prior to the second independent audio data, a second storage medium
The second transfer voice data stored in the memory is read, and the start time of the transfer is "Reading of the first transfer voice data".
The output starts and the reading of the second independent audio data
After the start of the
Instead of "when one unit of the repetitive playback is finished",
"Reading of the first transition voice data has started, and
After the reading of the second transition audio data is started,
Therefore, a single repetition of reproducing the first independent audio data.
When the position ends, the reproducing unit refers to the transition start time in (c) above.
From the end of the transition to the end of the transition
Instead of "playing line audio data"
First transition voice data and the read second transition sound
The voice data and the voice data are reproduced simultaneously ".
of. 3. The reproducing apparatus according to claim 2, wherein the reproducing unit is from the transition start point to the transition end point.
Until the volume of playing the first transition audio data gradually
Volume decreases and the volume for playing the second transition audio data gradually increases
What is characterized by increasing to. 4. The reproducing apparatus according to claim 3, wherein the reproducing section is from the transition start time point to the transition end time point.
Up to the first transition audio data and the second transition audio data.
Play the former, and the latter to the volume to play the former.
Play the former by mixing so that the volume increases gradually.
Volume gradually decreases, and the volume for playing the latter gradually
Characterized by increasing. 5. The method according to claim 2, wherein
In the live device, the first transition audio data is a plurality of data provided in the reproduction unit.
Performance instruction data for instructing the performance of an electronic musical instrument,
Fingers are used to reduce the number of electronic musical instruments played at times.
The second transition voice data is the performance instruction data shown, and the second transition voice data is that of the plurality of electronic musical instruments.
When playing other instruments that are associated with each
Audio recording data for prerecording the audio of the electronic musical instrument
When you finish playing the instrument,
Voices when playing other musical instruments that are associated with electronic musical instruments
The thing that the reproduction of is started. 6. The method according to claim 1, 2, or 5.
In the reproducing apparatus, the first transition audio data includes a plurality of pieces of data included in the reproducing unit.
This is performance instruction data for instructing the performance of an electronic musical instrument, and the reproduction section is configured to change from the transition start point to the transition end point.
Up to the number of
To gradually reduce the number of sub-musical instruments played
Characterized by and. 7. An input reception unit, a transition voice data generation unit,
A residual voice data generation unit, wherein the input reception unit receives an input of basic voice data, and the transition voice data generation unit receives the input.
The specified transition time from the beginning of the basic audio data
The number of pulling bits and the sampling frequency are
Both are obtained by sampling so that one gradually increases
Generated voice data as transition voice data, and the residual voice data generation unit receives the input.
From the beginning of the basic audio data
The remaining residual voice data is generated as residual voice data.
Characterized by 8. An input reception unit, a transition voice data generation unit,
The input device receives the input of the basic voice data, and the transition voice data generation unit receives the input.
Frequency component at the beginning of the basic audio data
This is audio data in which any one of several components is selected.
When the number of the selected frequency components gradually increases,
Characterized by being generated as transition voice data. 9. A reproducing section, a first reading section, a second reading section,
A reproducing method executed by a reproducing apparatus comprising: the first reading unit in response to a read request from the reproducing unit.
The first independent voice data stored in the first storage medium,
A first reading step for sequentially reading the 1-transition audio data, and a read request from the reproducing section for the first reading section.
Reads the second single voice data stored in the second storage medium.
The second reading step of outputting and the reproducing section simultaneously include (a) the first reading section and the second reading section.
A read request is made, and (b) the first read unit reads the first independent audio data.
When the output starts, the read first single audio data
Is repeatedly reproduced until a predetermined transition start time point, and (c) a predetermined transition time elapses from the transition start time point.
Until the time point (hereinafter referred to as “end point of transition”).
1 Playback the first transition audio data read by the reading unit
And (d) read by the second reading unit from the end of the transition.
A reproducing step for reproducing the second single audio data that has been found ,
And the start point of the transition is "Reading of the first transition voice data.
The output starts and the reading of the second independent audio data
After the start of the
It is the time when one unit of the repeating reproduction is finished.
How to characterize. 10. An input acceptance process and a transfer voice data generator.
And a residual voice data generation step,
So, in the input receiving process, input of basic voice data is accepted
In the transition voice data generation step, the input is accepted.
A predetermined transition time from the beginning of the basic audio data
The number of sampling steps and sampling frequency
Sampling so that at least one becomes larger
The obtained voice data is generated as transition voice data , and the input is accepted in the residual voice data generation step.
Of the specified transition time from the beginning of the recorded basic audio data
The residual audio data excluding
A method characterized by: 11. An input acceptance process and a transfer voice data generator.
And a step of receiving the input of the basic voice data in the input receiving step.
In the transition voice data generation step, the input is accepted.
Found the frequency component at the beginning of the basic audio data
It is audio data that is selected from any of the frequency components.
Therefore, the number of selected frequency components gradually increases.
Is generated as transition voice data.
Method. 12. A computer, the playback unit, a read request from the reproduction unit, the first storage medium
The stored first single voice data and the first transition voice data
Are sequentially read by the first read unit and the read request from the reproducing unit.
A second reading unit for reading the stored second independent voice data
A program that causes the playback unit to read the first read data.
Section and the second reading section were simultaneously requested to read.
In the case of the second single voice data
The time when the reading is started is before the first reading unit.
After the time when the reading of the first transition voice is started
Ri, the reproducing unit (a) and the first reading section, to said second reading unit, at the same time
A read request is made, and (b) the first read unit reads the first independent audio data.
When the output starts, the read first single audio data
Is repeatedly reproduced until a predetermined transition start time point, and (c) a predetermined transition time elapses from the transition start time point.
Until the time point (hereinafter referred to as “end point of transition”).
1 Playback the first transition audio data read by the reading unit
And (d) read by the second reading unit from the end of the transition.
The extracted second single voice data is played back, and the transition start time is set to "Read the first transition voice data.
The output starts and the reading of the second independent audio data
After the start of the
At the end of one unit of repeating playback
A program characterized by making it function. 13. A computer, an input reception unit, a transition voice.
As a data generator and residual voice data generator
In the computer, the input accepting unit accepts an input of basic audio data, and the transition audio data generating unit accepts the input.
The specified transition time from the beginning of the basic audio data
At least the number of pulling steps and the sampling frequency
Also, one can be obtained by sampling so that it gradually becomes larger.
Generated voice data as transition voice data, and the residual voice data generation unit receives the input.
From the beginning of the basic audio data
The remaining residual voice data is generated as residual voice data.
A program characterized by making it function like. 14. A computer, an input receiving unit, and
It is a program that functions as a transition voice data generator.
Therefore, in the computer, the input receiving unit receives the input of the basic voice data, and the transition voice data generating unit receives the input of the program.
Frequency component at the beginning of the basic audio data
This is audio data in which any one of several components is selected.
When the number of the selected frequency components gradually increases,
Functioning to generate as transition voice data
Characteristic program.