CN201667200U - Karaoke circuit and television - Google Patents
Karaoke circuit and television Download PDFInfo
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- CN201667200U CN201667200U CN2010201454973U CN201020145497U CN201667200U CN 201667200 U CN201667200 U CN 201667200U CN 2010201454973 U CN2010201454973 U CN 2010201454973U CN 201020145497 U CN201020145497 U CN 201020145497U CN 201667200 U CN201667200 U CN 201667200U
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- 230000005236 sound signal Effects 0.000 abstract 1
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Abstract
The utility model is suitable for music score and provides a Karaoke circuit and a television. The Karaoke circuit is provided with a low-pass filter, a high-pass filter and a subtractor which are mutually connected in parallel; sound source signals the frequencies of which are between 300 and 3000 Hz are eliminated by the low-pass filter and the high-pass filter; the same song signals in a left sound channel and a right sound channel are subtracted and cancelled by the subtractor; then the output results of the low-pass filter, the high-pass filter and the subtractor are mixed to obtain the sound source signal the song signal of which is eliminated; and a music signal provided with the sound of singing is obtained by mixing the sound source signal and a microphone signal; therefore, the Karaoke circuit can be applied to sound source storage mediums provided with singing sound signals, like common CD, MP3, etc, which can save the cost for buying a special accompaniment tape or accompaniment disk.
Description
Technical field
The utility model belongs to the signal Processing field, relates in particular to a kind of Karaoke circuit and televisor.
Background technology
Existing Karaoke circuit fails the singing voice signals in the sound source signal is eliminated, and the user can only buy special Karaoke accompaniment band or accompaniment dish, and use cost is higher.
The utility model content
The purpose of the utility model embodiment is to provide a kind of Karaoke circuit, is intended to solve existing Karaoke circuit and fails problem that the singing voice signals in the sound source signal is eliminated.
The utility model embodiment realizes like this, a kind of Karaoke circuit, comprise: microphone circuit and second mixer that is connected with described microphone circuit, described Karaoke circuit also comprise the song elimination circuit that inserts second mixer, and described song is eliminated circuit and comprised:
Low-pass filter is used to receive sound source signal, and the sound source signal that frequency is higher than 300Hz is eliminated, and output frequency is lower than the first accompaniment music signal of 300Hz;
Hi-pass filter is used to receive sound source signal, and the sound source signal that frequency is lower than 3KHz is eliminated, and output frequency is higher than the second accompaniment music signal of 3KHz;
Subtracter is used to receive sound source signal, and the singing voice signals that left and right sound channels in the sound source signal is identical subtracts each other counteracting, output first music signal; And
First mixer is used to receive described first music signal, the first accompaniment music signal and the second accompaniment music signal, and described first music signal, the first accompaniment music signal and the second accompaniment music signal are mixed, and exports second music signal.
Among the utility model embodiment, described subtracter is an operational amplifier.
Another purpose of the utility model embodiment is to provide a kind of televisor, described televisor has the Karaoke circuit, described Karaoke circuit comprises: microphone circuit, second mixer that is connected with described microphone circuit and the song that inserts second mixer are eliminated circuit, and described song is eliminated circuit and specifically comprised:
Low-pass filter is used to receive sound source signal, and the sound source signal that frequency is higher than 300Hz is eliminated, and output frequency is lower than the first accompaniment music signal of 300Hz;
Hi-pass filter is used to receive sound source signal, and the sound source signal that frequency is lower than 3KHz is eliminated, and output frequency is higher than the second accompaniment music signal of 3KHz;
Subtracter is used to receive sound source signal, and the singing voice signals that left and right sound channels in the sound source signal is identical subtracts each other counteracting, output first music signal; And
First mixer is used to receive described first music signal, the first accompaniment music signal and the second accompaniment music signal, and described first music signal, the first accompaniment music signal and the second accompaniment music signal are mixed, and exports second music signal.
The utility model embodiment utilizes amplifier subtraction circuit and high and low pass filter circuit to realize eliminating the purpose of song, and is with low cost, the reliability height.Be suitable for televisor with Kara OK function.For the client provides many convenience, more saved and much bought the professional Karaoke accompaniment band or the cost of accompaniment dish.
Description of drawings
Fig. 1 is the Karaoke circuit block diagram that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
According to the fundamental frequency spectrum distribution rule of voice, most song frequency distribution are between 300Hz-3KHz.When stereo song was recorded, voice was in recording studio central authorities, and the signal of enrolling voice simultaneously by two microphones is to left and right sound channels, so the signal of voice is equal substantially in left and right acoustic channels, phase place is basically identical also.But the recording of musical instrument is the recording of a microphone, and various musical instrument accompaniment also can not be positioned at middle in the position of recording studio.
The Karaoke circuit that the utility model embodiment provides has low-pass filter parallel with one another, Hi-pass filter and subtracter, eliminating frequency by low-pass filter and Hi-pass filter is the sound source signal of 300～3000Hz, by subtracter singing voice signals identical in sound source signal L channel and the R channel is subtracted each other counteracting, output result with low-pass filter, Hi-pass filter and subtracter mixes then, the be eliminated sound source signal of singing voice signals, this sound source signal mix with microphone signal and promptly get the music signal with song.Thereby Ben Kala OK circuit can be applied to have the source of sound storage medium of singing voice signals, as common CD, MP3 etc., saves the expense of buying special-purpose accompaniment band or accompaniment dish.
The utility model embodiment provides a kind of Karaoke circuit, described Karaoke circuit comprises: microphone circuit and second mixer that is connected with described microphone circuit, described Karaoke circuit also comprises the song elimination circuit that inserts second mixer, and described song is eliminated circuit and comprised:
Low-pass filter is used to receive sound source signal, and the sound source signal that frequency is higher than 300Hz is eliminated, and output frequency is lower than the first accompaniment music signal of 300Hz;
Hi-pass filter is used to receive sound source signal, and the sound source signal that frequency is lower than 3KHz is eliminated, and output frequency is higher than the second accompaniment music signal of 3KHz;
Subtracter is used to receive sound source signal, and the singing voice signals that left and right sound channels in the sound source signal is identical subtracts each other counteracting, output first music signal; And
First mixer is used to receive described first music signal, the first accompaniment music signal and the second accompaniment music signal, and described first music signal, the first accompaniment music signal and the second accompaniment music signal are mixed, and exports second music signal.
The utility model embodiment also provides a kind of televisor, described televisor has the Karaoke circuit, described Karaoke circuit comprises: microphone circuit, second mixer that is connected with described microphone circuit and the song that inserts second mixer are eliminated circuit, and described song is eliminated circuit and specifically comprised:
Low-pass filter is used to receive sound source signal, and the sound source signal that frequency is higher than 300Hz is eliminated, and output frequency is lower than the first accompaniment music signal of 300Hz;
Hi-pass filter is used to receive sound source signal, and the sound source signal that frequency is lower than 3KHz is eliminated, and output frequency is higher than the second accompaniment music signal of 3KHz;
Subtracter is used to receive sound source signal, and the singing voice signals that left and right sound channels in the sound source signal is identical subtracts each other counteracting, output first music signal; And
First mixer is used to receive described first music signal, the first accompaniment music signal and the second accompaniment music signal, and described first music signal, the first accompaniment music signal and the second accompaniment music signal are mixed, and exports second music signal.
Embodiment one
Described in detail below in conjunction with specific embodiment of the utility model.
Fig. 1 shows the structure of the Karaoke circuit that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment.
The Karaoke circuit that the utility model embodiment provides comprises microphone circuit and second mixer 5 that is connected with described microphone circuit, and described Karaoke circuit also comprises the song elimination circuit that inserts second mixer 5.
The input end that song is eliminated circuit is connected with R channel with the L channel of sound source signal 10 respectively.Described song is eliminated circuit and is comprised low-pass filter parallel with one another 1, Hi-pass filter 2 and subtracter 3.Described low-pass filter 1 has two input ends, and one of them input end is connected with the L channel of sound source signal, and another input end is connected with the R channel of sound source signal.Described low-pass filter 1 is used to eliminate the sound source signal that frequency is higher than 300Hz, obtains the first accompaniment music signal that frequency is lower than 300Hz.Described Hi-pass filter 2 has two input ends, and one of them input end is connected with the L channel of sound source signal, and another input end is connected with the R channel of sound source signal.Described Hi-pass filter 2 is used to eliminate the sound source signal that frequency is lower than 3KHz, obtains the second accompaniment music signal that frequency is higher than 3KHz.The described first accompaniment music signal and the second accompaniment music signal are the absolute music accompaniment signal that does not have song.Described subtracter 3 also has two input ends, and one of them input end is connected with the L channel of sound source signal, and another input end is connected with the R channel of sound source signal.Described subtracter 3 is used for the singing voice signals that the sound source signal left and right sound channels is identical and subtracts each other counteracting, obtains the first music signal, and described first music signal is the music signal that does not have song.In the present embodiment, for reducing cost, described subtracter 3 adopts common operational amplifier.This song is eliminated circuit and is also comprised first mixer 4 that described first music signal, the first accompaniment music signal and the second accompaniment music signal are mixed, described low-pass filter 1, Hi-pass filter 2 and subtracter 3 output terminals insert first mixer 4, described first music signal, the first accompaniment music signal and the second accompaniment music signal are after described first mixer 4 mixes, obtain second music signal, described second music signal is the complete accompaniment music signal of frequency spectrum behind the elimination singing voice signals.
In the present embodiment, described microphone circuit comprises interconnective amplifying circuit 6 and reverberation circuit 7.When the user sang, singing voice signals 9 amplified through described amplifying circuit 6, after described reverberation circuit 7 reverberation are handled, mixes amplification with described second music signal, and promote loudspeaker 8 and speak, thus the function that realization comes sing karaoke with the film source that contains song.
Embodiment two
The televisor that present embodiment provides has above-mentioned Karaoke circuit, thereby can use the source of sound storage medium with singing voice signals, and as common CD, MP3 etc., sing karaoke on televisor is saved the expense of buying special-purpose accompaniment band or accompaniment dish.
The utility model embodiment is with the purpose of amplifier subtraction circuit and high low-pass filter circuit realization elimination song, and is with low cost, the reliability height.Be suitable for televisor with Kara OK function.For the client provides many convenience, more saved and much bought the professional Karaoke accompaniment band or the cost of accompaniment dish.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. Karaoke circuit comprises: microphone circuit and second mixer that is connected with described microphone circuit, it is characterized in that described Karaoke circuit also comprises the song elimination circuit that inserts second mixer, and described song elimination circuit comprises:
Low-pass filter is used to receive sound source signal, and the sound source signal that frequency is higher than 300Hz is eliminated, and output frequency is lower than the first accompaniment music signal of 300Hz;
Hi-pass filter is used to receive sound source signal, and the sound source signal that frequency is lower than 3KHz is eliminated, and output frequency is higher than the second accompaniment music signal of 3KHz;
Subtracter is used to receive sound source signal, and the singing voice signals that left and right sound channels in the sound source signal is identical subtracts each other counteracting, output first music signal; And
First mixer is used to receive described first music signal, the first accompaniment music signal and the second accompaniment music signal, and described first music signal, the first accompaniment music signal and the second accompaniment music signal are mixed, and exports second music signal.
2. Karaoke circuit as claimed in claim 1 is characterized in that, described subtracter is an operational amplifier.
3. Karaoke circuit as claimed in claim 2 is characterized in that described microphone circuit comprises interconnective amplifying circuit and reverberation circuit.
4. televisor, it has the Karaoke circuit, and described Karaoke circuit comprises: microphone circuit and second mixer that is connected with described microphone circuit is characterized in that, described Karaoke circuit also comprises the song elimination circuit that inserts second mixer, and described song is eliminated circuit and comprised:
Low-pass filter is used to receive sound source signal, and the sound source signal that frequency is higher than 300Hz is eliminated, and output frequency is lower than the first accompaniment music signal of 300Hz;
Hi-pass filter is used to receive sound source signal, and the sound source signal that frequency is lower than 3KHz is eliminated, and output frequency is higher than the second accompaniment music signal of 3KHz;
Subtracter is used to receive sound source signal, and the singing voice signals that left and right sound channels in the sound source signal is identical subtracts each other counteracting, output first music signal; And
First mixer is used to receive described first music signal, the first accompaniment music signal and the second accompaniment music signal, and described first music signal, the first accompaniment music signal and the second accompaniment music signal are mixed, and exports second music signal.
5. televisor as claimed in claim 4 is characterized in that, described subtracter is an operational amplifier.
6. televisor as claimed in claim 5 is characterized in that described microphone circuit comprises interconnective amplifying circuit and reverberation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201454973U CN201667200U (en) | 2010-03-25 | 2010-03-25 | Karaoke circuit and television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201454973U CN201667200U (en) | 2010-03-25 | 2010-03-25 | Karaoke circuit and television |
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| Publication Number | Publication Date |
|---|---|
| CN201667200U true CN201667200U (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201454973U Expired - Fee Related CN201667200U (en) | 2010-03-25 | 2010-03-25 | Karaoke circuit and television |
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| CN (1) | CN201667200U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915086A (en) * | 2013-01-07 | 2014-07-09 | 华为技术有限公司 | Information processing method, device and system |
| CN112055285A (en) * | 2020-09-16 | 2020-12-08 | 广州市锐舞灯光音响器材有限公司 | Multi-channel full-automatic decoding preamplifier |
-
2010
- 2010-03-25 CN CN2010201454973U patent/CN201667200U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915086A (en) * | 2013-01-07 | 2014-07-09 | 华为技术有限公司 | Information processing method, device and system |
| WO2014106375A1 (en) * | 2013-01-07 | 2014-07-10 | 华为技术有限公司 | Method, apparatus and system for information processing |
| CN112055285A (en) * | 2020-09-16 | 2020-12-08 | 广州市锐舞灯光音响器材有限公司 | Multi-channel full-automatic decoding preamplifier |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20140325 |