close

Вход

Забыли?

вход по аккаунту

?

JP2010050940

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2010050940
An object of the present invention is to make it possible to recognize positional information at
the time of sound recording or sound input. SOLUTION: Audio information inputted from an
audio generation source 1 is inputted to a microphone 2. Then, the frequency characteristic of
voice is converted into an electrical signal by the microphone 2, the voice signal is output from
the output terminal 3 to the input terminal 4, and the voice signal is input to the input terminal
4. The frequency characteristic of the audio information input from the input unit 4 is set by the
equalizer 5 so that the sound pressure level is the same as or as close as possible to the equal
loudness curve for each frequency band. In consideration of the frequency characteristics of the
signal that changes due to individual differences of devices by passing through the microphone
2, the speaker 8, the amplifier unit 7, etc., the frequency characteristics finally output from the
speaker 8 are set to be equal loudness curves . At this time, it is desirable to match the equal
loudness curve for each frequency band in accordance with the sound pressure level at the time
of reproduction. [Selected figure] Figure 1
Stereophonic sound generation method
[0001]
The present invention relates to a stereophonic sound generation method for reproducing a
stereophonic sound field.
[0002]
The frequency characteristics of the conventional audio equipment, recording media, and audio
08-05-2019
1
source are set to be flat, and the position information of the audio can not be reproduced at the
time of reproduction.
Since patent document 1 processes an audio | voice signal and adds the pseudo | simulation
surround effect and reproduces | regenerates the audio | voice positional information on a fake
person, it can not reproduce the positional information on an audio | voice signal at the time of
reproduction | regeneration. JP, 2006-101461, A
[0003]
According to the conventional setting method described above, position information at the time
of voice recording or input can not be recognized at the time of voice reproduction.
[0004]
Therefore, the present invention is intended to solve the problems that such a conventional
configuration has, and it is an object of the present invention to be able to recognize position
information at the time of sound recording or at the time of sound reproduction. It is a thing.
[0005]
Then, in order to achieve the above object, the present invention is characterized by converting
the frequency characteristic of the audio signal into an equal loudness curve.
[0006]
The present invention can recognize positional information at the time of voice recording or at
the time of voice reproduction.
[0007]
Hereinafter, embodiments of the present invention will be described based on the drawings.
[0008]
In FIG. 1, 1 is a generation source of audio information, and when audio information is emitted,
position information is present.
08-05-2019
2
2 is a microphone for converting voice into an electrical signal, 3 is an output terminal of the
voice signal of the microphone, and 4 is an input terminal of the voice signal.
[0009]
Reference numeral 5 denotes an equalizer, which weights the frequency characteristic and finally
converts the frequency characteristic during reproduction so as to be an equal loudness curve.
It should be noted that any device that can convert the frequency characteristic of the audio
signal such as a processor into a frequency characteristic that matches the equal loudness curve
may be used instead of the equalizer.
6 is an output terminal, 7 is an amplifier unit, and 8 is a speaker that finally outputs voice.
[0010]
The operation of the above configuration will be described below.
Audio information input from the audio generation source 1 is input to the microphone 2.
Then, the frequency characteristic of voice is converted into an electrical signal by the
microphone 2, the voice signal is output from the output terminal 3 to the input terminal 4, and
the voice signal is input to the input terminal 4.
[0011]
The frequency characteristic of the audio signal input from the input unit 4 by the equalizer 5 is
set such that the sound pressure level is the same as or as close as possible to the equal loudness
curve of FIG. 2 for each frequency band.
[0012]
08-05-2019
3
In consideration of the frequency characteristics of the signal that changes due to individual
differences of devices by passing through the microphone 2, the speaker 8, the amplifier unit 7,
etc., the frequency characteristics finally output from the speaker 8 are set to be equal loudness
curves .
At this time, it is desirable to match the equal loudness curve for each frequency band in
accordance with the sound pressure level at the time of reproduction.
[0013]
Although it is desirable to perform weighting so as to have the same frequency characteristic as
the equal loudness curve, even if it is slightly different from the frequency characteristic of the
equal loudness curve, some degree of positional information is reproduced at the time of sound
reproduction. In this case, as the difference in frequency characteristics increases, the position
information is lost and the position information changes.
[0014]
The same effect can be obtained by converting an audio signal from a recording medium such as
a CD recording a sound signal or a DVD into an equal loudness curve.
[0015]
As described above, by converting the frequency characteristic during reproduction of the audio
signal into an equal loudness curve, the position information of the audio generation source 1 is
reproduced in the audio reproduced from the speaker 8.
[0016]
It is a configuration block diagram.
It is a table which shows the equal loudness curve of new standard.
08-05-2019
4
Explanation of sign
[0017]
1 sound source 2 microphone 3 output 4 input 5 equalizer 6 output 7 amplifier 8 speaker
08-05-2019
5
Документ
Категория
Без категории
Просмотров
0
Размер файла
11 Кб
Теги
jp2010050940
1/--страниц
Пожаловаться на содержимое документа