CN203596866U - Audio transmission circuit and TV set - Google Patents
Audio transmission circuit and TV set Download PDFInfo
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- CN203596866U CN203596866U CN201320778450.4U CN201320778450U CN203596866U CN 203596866 U CN203596866 U CN 203596866U CN 201320778450 U CN201320778450 U CN 201320778450U CN 203596866 U CN203596866 U CN 203596866U
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- 230000005236 sound signal Effects 0.000 claims description 35
- 238000010183 spectrum analysis Methods 0.000 claims description 18
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Abstract
The utility model discloses an audio transmission circuit and a TV set. The audio transmission circuit includes a left channel high-pass filter, a right channel high-pass filter, a left channel phase inverter, a right channel phase inverter, a left adder and a right adder. An input end of the left channel high-pass filter is connected to a first input end of the left adder, and an output end of the left channel high-pass filter is connected to an input end of the left channel phase inverter. An output end of the left channel phase inverter is connected to a second output end of the right adder. An input end of the right channel high-pass filter is connected to a first input end of the right adder, and an output end of the right channel high-pass filter is connected to an input end of the right channel phase inverter. An output end of the right channel phase inverter is connected to a second input end of the left adder. According to the utility model, the sound field is broadened, and the distance for listening to a stereo sound is increased.
Description
Technical field
The utility model relates to technical field of electronic products, particularly a kind of audio transmission circuit and television set.
Background technology
As everyone knows, current most television set all adopts dual-channel audio system.But owing to being subject to the restriction of the restriction of television set overall dimension and the position of loud speaker, make the distance of uppick stereo sound shorter, thereby make beholder in the time that normal viewing distance is appreciated excellent picture, the stereophonic effect that imperceptible dual-channel audio system is brought.In order to reach three-dimensional audibility, conventionally need to increase stereo set, therefore user needs additional configuration stereo set to carry out audio frequency broadcasting.
Utility model content
Main purpose of the present utility model is to provide a kind of audio transmission circuit, is intended to realize the broadening effect of sound field, increases the distance of uppick stereo sound.
To achieve these goals, the utility model provides a kind of audio transmission circuit, described audio transmission circuit comprises L channel high pass filter, R channel high pass filter, L channel inverter, R channel inverter, left adder and right adder, wherein the input of L channel high pass filter and the first input end of left adder are connected, and output is connected with the input of described L channel inverter; The output of described L channel inverter is connected with the second input of right adder; The input of described R channel high pass filter is connected with the first input end of right adder, and output is connected with the input of described R channel inverter; The output of described R channel inverter is connected with the second input of left adder.
Preferably, between described L channel inverter and the second input of right adder, be provided with the L channel attenuator that carries out gain-adjusted.
Preferably, between described R channel inverter and the second input of left adder, be provided with the R channel attenuator that carries out gain-adjusted.
Preferably, described audio transmission circuit also comprises the voice spectrum analysis module for analyzing audio signal voice peak frequency, the output of described voice spectrum analysis module is connected with L channel high pass filter and R channel high pass filter respectively, and in the audio signal that described L channel high pass filter obtains according to described voice spectrum analysis module analysis, voice peak frequency is adjusted its lower-cut-off frequency; In the audio signal that described R channel high pass filter obtains according to described voice spectrum analysis module analysis, voice peak frequency is adjusted its lower-cut-off frequency.
Preferably, voice spectrum analysis module comprises the first audio input end and the second audio input end, described the first audio input end is connected with the input of described L channel high pass filter, and described the second audio input end is connected with the input of described R channel high pass filter.
The utility model also provides a kind of television set, described television set comprises audio transmission circuit, described audio transmission circuit comprises L channel high pass filter, R channel high pass filter, L channel inverter, R channel inverter, left adder and right adder, wherein the input of L channel high pass filter and the first input end of left adder are connected, and output is connected with the input of described L channel inverter; The output of described L channel inverter is connected with the second input of right adder; The input of described R channel high pass filter is connected with the first input end of right adder, and output is connected with the input of described R channel inverter; The output of described R channel inverter is connected with the second input of left adder.
The utility model, by adopting L channel inverter to carry out after anti-phase processing the L channel high-frequency signal of L channel high pass filter output, is superposeed anti-phase L channel high-frequency signal after treatment and right-channel signals by right adder; Adopt R channel inverter to carry out after anti-phase processing the R channel high-frequency signal of R channel high pass filter output simultaneously, by right adder, anti-phase R channel high-frequency signal after treatment and left channel signals are superposeed.Thereby make to have mixed R channel high-frequency signal in left channel audio signal, make to have mixed L channel high-frequency signal in right channel audio signal, therefore realized the broadening effect of sound field, thereby increased the distance of uppick stereo sound.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model audio transmission circuit the first embodiment;
Fig. 2 is the structural representation of the utility model audio transmission circuit the second embodiment.
Realization, functional characteristics and the advantage of the utility model object, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of audio transmission circuit.
With reference to Fig. 1, Fig. 1 is the structural representation of the utility model audio transmission circuit the first embodiment.The utility model provides a kind of audio transmission circuit to comprise L channel high pass filter 10, R channel high pass filter 11, L channel inverter 12, R channel inverter 13, left adder 14 and right adder 15, wherein the input of L channel high pass filter 10 is connected with the first input end of left adder 14, and output is connected with the input of described L channel inverter 12; The output of described L channel inverter 12 is connected with the second input of right adder 15; The input of described R channel high pass filter 11 is connected with the first input end of right adder 15, and output is connected with the input of described R channel inverter 13; The output of described R channel inverter 13 is connected with the second input of left adder 14.
In the present embodiment, above-mentioned L channel high pass filter 10 and R channel high pass filter 11 are high pass filter, and frequency filtering scope can arrange according to actual needs, for example, can select 2KHz-6KHz.
When use, the input of L channel high pass filter 10 and left adder 14 is respectively used to receive left channel audio signal, and the input of R channel high pass filter 11 and right adder 15 is respectively used to receive right channel audio signal.
When work, left channel audio signal is undertaken after filtering processing by L channel high pass filter 10, the left channel audio signal of predetermined frequency (for example: 2KHz-6KHz) is exported in L channel inverter 12, carry out exporting to after anti-phase processing the second input of right adder 15, the left channel audio signal of the right channel audio signal of its first input end input and its second input being inputted after reverse process by right adder 15 carries out overlap-add procedure, and export the signal after overlap-add procedure to loudspeaker, thereby realize the audio frequency broadcasting of L channel.Right channel audio signal is undertaken after filtering processing by R channel high pass filter 11, the left channel audio signal of predetermined frequency (for example: 2KHz-6KHz) is exported in R channel inverter 13, carry out exporting to after anti-phase processing the second input of left adder 14, the right channel audio signal of the left channel audio signal of its first input end input and its second input being inputted after reverse process by left adder 14 carries out overlap-add procedure, and export the signal after overlap-add procedure to loudspeaker, thereby realize the audio frequency broadcasting of L channel.
The utility model is undertaken after anti-phase processing by the L channel high-frequency signal that adopts L channel inverter 12 to export L channel high pass filter 10, by right adder 15, anti-phase L channel high-frequency signal after treatment and right-channel signals is superposeed; Adopt the R channel high-frequency signal that R channel inverter 13 is exported R channel high pass filter 11 to carry out after anti-phase processing simultaneously, by right adder 15, anti-phase R channel high-frequency signal after treatment and left channel signals are superposeed.Thereby make to have mixed R channel high-frequency signal in left channel audio signal, make to have mixed L channel high-frequency signal in right channel audio signal, therefore realized the broadening effect of sound field, thereby increased the distance of uppick stereo sound.
Further, with reference to Fig. 2, Fig. 2 is the structural representation of the utility model audio transmission circuit the second embodiment.Based on above-described embodiment, in the present embodiment, between above-mentioned L channel inverter 12 and the second input of right adder 15, be provided with the L channel attenuator 16 that carries out gain-adjusted.
Between above-mentioned R channel inverter 13 and the second input of left adder 14, be provided with the R channel attenuator 17 that carries out gain-adjusted.
In the present embodiment, in the time of work, the audio signal that above-mentioned L channel attenuator 16 and R channel attenuator 17 are exported L channel inverter 12 and R channel inverter 13 is respectively carried out supercharging decay, form the signal of suitable intensity of sound, and then the high-frequency signal after decay is processed to laggard line output by corresponding adder.Due to high-frequency signal is carried out to attenuation processing, can effectively prevent that the signal strength signal intensity of high-frequency signal and the signal strength signal intensity of former audio signal are comparatively approaching, cause the phenomenon that occurs that acoustic image is torn, therefore, improve further the effect that audio frequency is play.
Further, based on above-described embodiment, in the present embodiment, above-mentioned audio transmission circuit also comprises the voice spectrum analysis module 18 for analyzing audio signal voice peak frequency, the output of described voice spectrum analysis module 18 is connected with L channel high pass filter 10 and R channel high pass filter 11 respectively, and described L channel high pass filter 10 is analyzed voice peak frequency in the audio signal obtaining according to described voice spectrum analysis module 18 and adjusted its lower-cut-off frequency; Described R channel high pass filter 11 is analyzed voice peak frequency in the audio signal obtaining according to described voice spectrum analysis module 18 and is adjusted its lower-cut-off frequency.
Particularly, in the present embodiment, above-mentioned voice spectrum analysis module 18 comprises the first audio input end and the second audio input end, described the first audio input end is connected with the input of described L channel high pass filter 10, and described the second audio input end is connected with the input of described R channel high pass filter 11.
When work, the first input end of voice spectrum analysis module 18 receives left channel audio signal, the second input receives right channel audio signal, voice spectrum analysis module 18 obtains the frequency of people's acoustic frequency maximum in audio signal according to the left channel audio signal receiving and right channel audio signal real-time analysis, for example, in left channel audio signal and right channel audio signal, in the time that people's acoustic frequency is 4KHz to the maximum, this 4KHz is exported to respectively in L channel high pass filter 10 and R channel high pass filter 11.Now the lower-cut-off frequency of L channel high pass filter 10 and R channel high pass filter 11 can be adjusted to 4KHz, upper cut-off frequency can arrange according to actual needs, for example 6KHz, the high-frequency signal frequency range of the output of L channel high pass filter 10 and R channel high pass filter 11 output is between 4KHz-6KHz.When in left channel audio signal and right channel audio signal without voice or voice hour, exportable people's acoustic frequency is 2KHz, for L channel high pass filter 10 and R channel high pass filter 11, lower-cut-off frequency is set.
In the present embodiment, due to the frequency of voice maximum in voice spectrum analysis module 18 analyzing audio signals being set, then this frequency is adjusted into the lower-cut-off frequency of L channel high pass filter 10 and R channel high pass filter 11, thereby make by there is not voice in L channel high pass filter 10 and R channel high pass filter 11 output output signals, and then while making adder carry out overlap-add procedure, there is not the stack of voice, therefore further improve the definition that sound is play, improved the effect that audio frequency is play.
The utility model also provides a kind of television set, and this television set comprises audio transmission circuit, and the structure of this audio transmission circuit can, with reference to above-described embodiment, not repeat them here.Naturally, because the television set of the present embodiment has adopted the technical scheme of above-mentioned audio transmission circuit, therefore this television set has all beneficial effects of above-mentioned audio transmission circuit.
These are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. an audio transmission circuit, it is characterized in that, comprise L channel high pass filter, R channel high pass filter, L channel inverter, R channel inverter, left adder and right adder, wherein the input of L channel high pass filter and the first input end of left adder are connected, and output is connected with the input of described L channel inverter; The output of described L channel inverter is connected with the second input of right adder; The input of described R channel high pass filter is connected with the first input end of right adder, and output is connected with the input of described R channel inverter; The output of described R channel inverter is connected with the second input of left adder.
2. audio transmission circuit as claimed in claim 1, is characterized in that, is provided with the L channel attenuator that carries out gain-adjusted between the second input of described L channel inverter and right adder.
3. audio transmission circuit as claimed in claim 1, is characterized in that, is provided with the R channel attenuator that carries out gain-adjusted between the second input of described R channel inverter and left adder.
4. audio transmission circuit as claimed any one in claims 1 to 3, it is characterized in that, described audio transmission circuit also comprises the voice spectrum analysis module for analyzing audio signal voice peak frequency, the output of described voice spectrum analysis module is connected with L channel high pass filter and R channel high pass filter respectively, and in the audio signal that described L channel high pass filter obtains according to described voice spectrum analysis module analysis, voice peak frequency is adjusted its lower-cut-off frequency; In the audio signal that described R channel high pass filter obtains according to described voice spectrum analysis module analysis, voice peak frequency is adjusted its lower-cut-off frequency.
5. audio transmission circuit as claimed in claim 4, it is characterized in that, voice spectrum analysis module comprises the first audio input end and the second audio input end, described the first audio input end is connected with the input of described L channel high pass filter, and described the second audio input end is connected with the input of described R channel high pass filter.
6. a television set, is characterized in that, comprises the audio transmission circuit as described in any one in claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320778450.4U CN203596866U (en) | 2013-11-29 | 2013-11-29 | Audio transmission circuit and TV set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320778450.4U CN203596866U (en) | 2013-11-29 | 2013-11-29 | Audio transmission circuit and TV set |
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| CN203596866U true CN203596866U (en) | 2014-05-14 |
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| CN201320778450.4U Expired - Lifetime CN203596866U (en) | 2013-11-29 | 2013-11-29 | Audio transmission circuit and TV set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110139193A (en) * | 2018-02-02 | 2019-08-16 | 深圳市三诺数字科技有限公司 | The generation method of sound box system and spatial sound |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110139193A (en) * | 2018-02-02 | 2019-08-16 | 深圳市三诺数字科技有限公司 | The generation method of sound box system and spatial sound |
| CN110139193B (en) * | 2018-02-02 | 2021-10-08 | 深圳市三诺数字科技有限公司 | Sound box system and space sound generation method |
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