CN1212751C - Circuit equipment for converting output of two sound channels into output of six sound channels - Google Patents
Circuit equipment for converting output of two sound channels into output of six sound channels Download PDFInfo
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- CN1212751C CN1212751C CN02142420.9A CN02142420A CN1212751C CN 1212751 C CN1212751 C CN 1212751C CN 02142420 A CN02142420 A CN 02142420A CN 1212751 C CN1212751 C CN 1212751C
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Abstract
The present invention relates to a circuit device capable of converting the double-sound-channel output into the six-sound-channel output, which mainly comprise a coding/decoding device, an MIC-IN connector switching device, a first filter, a second filter, a third filter and a resistance circuit. A user can listen to the six-sound-channel output on a mainboard built up according to a PC99 standard by the circuit device of the present invention capable of converting the double-sound-channel output into the six-sound-channel output; simultaneously, when the six-sound-channel sound effect output is carried out, a sound effect signal post-arranged in a left annular field, a sound effect signal post-arranged in a right annular field, and an input LIN-IN-L and LINE-IN-R signal share the third filter so as to save the cost.
Description
Technical field
The present invention relates to a kind of two sound channels are exported and convert the circuit arrangement that six sound channels is exported to, especially refer to a kind of circuit arrangement that on motherboard, the output of two sound channels is converted to six sound channels output.
Background technology
On existing All-in-One motherboard (All-in one MotherBoard), it only provides LINE-OUT, LINE-IN and three groups of phono connectors of MIC-IN according to the PC99 standard, wherein the LINE-OUT connector provides the audio output of two sound channels, the MIC-IN connector then is connected to an external microphone and imports audio for the user from microphone, the LINE-IN connector then can be connected to the LINE-OUT connector of another audio device via a connecting line, to import audio from audio device.And six sound channels comprises L channel loudspeaker, R channel loudspeaker, middle sound channel loudspeaker, supper bass loudspeaker, a left side ring rearmounted loudspeaker and a right ring rearmounted loudspeaker, motherboard in the construction of foundation PC99 standard has only the LINE-OUT connector that the audio output of left and right two sound channels can be provided, so desire on the motherboard of foundation PC99 standard construction, to listen to six sound channels output its restriction is arranged obviously, and give improved necessity.
Summary of the invention
Main purpose of the present invention provides a kind of circuit arrangement that the output of two sound channels is converted to six sound channels output on motherboard.
For reaching above-mentioned purpose, the invention provides a kind of circuit arrangement that the output of two sound channels is converted to six sound channels output, it uses a MIC-IN connector, a LINE-IN connector, reaches the audio that a LINE-OUT connector is exported six sound channels, and circuit arrangement mainly comprises:
One coding/decoding device, in order to carry out the coding/decoding of sound signal, with sound channel sound signal, low sound effect signal, a left side ring rearmounted sound signal, a right ring rearmounted sound signal, L channel sound signal and R channel sound signal in the output, and input microphone signal, LINE-IN-L and LINE-IN-R signal, and produce a control signal;
One MIC-IN connector switching device shifter, the control signal according to the coding/decoding device is produced inputs or outputs device so that the MIC-IN connector is switched to;
One first filter, it exports middle sound channel sound signal and the coupling of low sound effect signal that the coding/decoding device is produced to the MIC-IN connector;
One second filter, it will be coupled to the coding/decoding device by the microphone signal of MIC-IN connector input;
One the 3rd filter, it will be coupled to the coding/decoding device by the LIN-IN-L and the LINE-IN-R signal of LINE-IN connector input;
One resistance circuit is that a left side ring rearmounted sound signal and a right ring rearmounted sound signal that the coding/decoding device is produced are coupled to the 3rd filter, to export via the LINE-IN connector.
Described circuit arrangement, it more comprises a microphone bias voltage circuit, and a microphone bias voltage signal will give suitable bias voltage by the microphone signal of MIC-IN connector input.
Described circuit arrangement, wherein, MIC-IN connector switching device shifter is made up of one first switching device shifter and one second switching device shifter, when control signal is electronegative potential, first switching device shifter is coupled to the MIC-IN connector with the microphone bias voltage signal of microphone bias voltage circuit, and the microphone signal that second switching device shifter is imported the MIC-IN connector is filter coupled to the coding/decoding device via second.
Described circuit arrangement, wherein, first switching device shifter is made up of the 3rd and the 4th nmos pass transistor, when control signal is electronegative potential, the 3rd nmos pass transistor conducting and the 4th nmos pass transistor is closed, and the microphone signal of input given suitable bias voltage.
Described circuit arrangement, wherein, second switching device shifter is made up of first and second nmos pass transistor, when control signal is electronegative potential, first and second nmos pass transistor conducting, and with the input microphone signal be coupled to second filter.
Described circuit arrangement, wherein, the coding/decoding device have correspond respectively in sound channel sound signal, low sound effect signal, a left side ring rearmounted sound signal, a right ring rearmounted sound signal, L channel sound signal, and a plurality of digital to analog converters of R channel sound signal, and correspond respectively to a plurality of analog-to-digital converters of microphone signal, LINE-IN-L and LINE-IN-R signal.
Described circuit arrangement, wherein, the coding/decoding device is when six sound channels is exported, the relevant digital to analog converter of a rearmounted sound signal, L channel sound signal and R channel sound signal is encircled on sound channel sound signal, low sound effect signal, a left side ring rearmounted sound signal, the right side in the startup, and closes the analog-to-digital converter of microphone signal, LINE-IN-L and the LINE-IN-R signal correction of input.
Described circuit arrangement, wherein, when the coding/decoding device is exported at non-six sound channels, sound channel sound signal, low sound effect signal, the rearmounted sound signal in ring field, a left side, the relevant digital to analog converter of a right ring rearmounted sound signal in closing, and the analog-to-digital converter of microphone signal, LINE-IN-L and the LINE-IN-R signal correction of startup input and L channel sound signal and the relevant digital to analog converter of R channel sound signal.
Convert the circuit arrangement that six sound channels is exported to by two sound channels output of the present invention, the user can listen to six sound channels output on the motherboard of foundation PC99 standard construction.Because the present invention constructs novelty, can provide on the industry and utilize, and truly have the enhancement effect.
Description of drawings
Fig. 1 is the calcspar that the output of the present invention's two sound channels converts the circuit arrangement of six sound channels output to;
Fig. 2 is the circuit diagram of circuit arrangement of the present invention;
Fig. 3 is the equivalent circuit diagram of circuit arrangement of the present invention when usual;
Fig. 4 is that circuit arrangement of the present invention is at the equivalent circuit diagram that carries out six sound channels output.
Embodiment
Relevant the present invention converts the output of two sound channels to one preferred embodiment of the circuit arrangement of six sound channels output, please refer to calcspar shown in Figure 1, it mainly comprises a coding/decoding device 10 (CODEC), one MIC-IN connector switching device shifter 20, one first filter 30, one second filter 40, one the 3rd filter 50, one resistance circuit 60, an and microphone bias voltage circuit 70, wherein, coding/decoding device 10 exportable control signal EAPD, make MIC-IN connector switching device shifter 20 that the MIC-IN connector is converted to exportable middle sound channel sound signal (CENOUT) and low sound effect signal (LEFOUT) by connecting an external microphone, the LINE-IN connector is imported LINE-IN-L by the outside, the LINE-IN-R conversion of signals is an exportable left side ring rearmounted sound signal (SUR-OUT-L), and a right ring rearmounted sound signal (SUR-OUT-R), and L channel sound signal (Front Left), R channel sound signal (Front Right) is then by original LINE-OUT connector output.
Fig. 2 is that Fig. 1 shows detailed circuit diagram, sound channel sound signal (CENOUT) and low sound effect signal (LEFOUT) during coding/decoding device 10 is exported via two digital to analog converters 101,102, middle sound channel sound signal and low sound effect signal are connected to the MIC-IN connector with sound channel sound signal and low sound effect signal in the output via first filter 30.
Coding/decoding device 10 is controlled MIC-IN connector switching device shifter 20 with a control signal EAPD, MIC-IN connector switching device shifter 20 has one first switching device shifter 21 and one second switching device shifter 22, the microphone bias voltage signal of telecommunication (+5VCODEC) be connected to first switching device shifter 21 via microphone bias voltage circuit 70, be coupled to the MIC-IN connector again, when an external microphone inserts the MIC-IN connector, provide suitable bias voltage to microphone signal, and the output signal (MIC-IN) that microphone signal is coupled to second filter, 40, the second filters 40 via second switching device shifter 22 then is connected to the analog-to-digital converter 105 of coding/decoding device 10.
Coding/decoding device 10 is exported a left side ring rearmounted sound signal (SUR-OUT-L) and a right ring rearmounted sound signal (SUR-OUT-R) via two digital to analog converters 103,104, a left side ring rearmounted sound signal and a right ring rearmounted sound signal are coupled to the 3rd filter 50 via a resistance circuit 60, are connected to the LINE-IN connector again to export a left side ring rearmounted sound signal and a right ring rearmounted sound signal.
External sound source then via the LINE-IN connector with input audio signal, the output signal end (LINE-IN-L, LINE-IN-R) that voice signal at first is coupled to the 3rd filter 50, the three filters 50 then is connected to the analog-to-digital converter 106,107 of coding/decoding device 10.
When only needing the output of two sound channels, the control signal EAPD of coding/decoding device 10 outputs one electronegative potential, so transistor Q4 is a closed condition, the voltage of node A is high potential, and make transistor Q3 is conducting state, the microphone bias voltage signal (+5VCODEC) then can be coupled to the MIC-IN connector via microphone bias voltage circuit 70, when inserting the MIC-IN connector, can provide suitable bias voltage to microphone signal with a convenient external microphone; Because of control signal EAPD is an electronegative potential, the voltage of Node B is high potential, so transistor Q1, Q2 are conducting state, inputs to coding/decoding device 10 so microphone signal can be coupled via second filter 40.
At this moment, coding/decoding device 10 is also with the analog-to-digital converter 105 of inside, 106,107 start, make it in running order to receive relevant input signal, and with the digital to analog converter 101 of inside, 102,103,104 close, and make it be output as high impedance status, inner digital to analog converter 108,109 start, make it in running order to export relevant audio output signal, its equivalent circuit diagram then as shown in Figure 3, circuit is the defined LINE-OUT of PC99 standard at this moment as shown in Figure 3, LINE-IN, and three groups of functions of MIC-IN.
When the needs six sound channels is exported, the control signal EAPD of coding/decoding device 10 outputs one high potential, so transistor Q4 is a conducting state, the voltage of node A then is electronegative potential, and make transistor Q3 is closed condition, the microphone bias voltage signal of telecommunication (+5VCODEC) then because of transistor Q3 is that closed condition can't be coupled to the MIC-IN connector via microphone bias voltage circuit 70, can avoid the middle sound channel sound signal of output is produced interference; Because of control signal EAPD is a high potential, the voltage of Node B is electronegative potential, so transistor Q1, Q2 are closed condition, so the low sound effect signal of output can not re-enter to coding/decoding device 10 via second filter 40.
At this moment, coding/decoding device 10 also starts the digital to analog converter 101,102,103,104,108,109 of inside, make it in running order to export relevant audio output signal, and simulating to digital converter 105,106,107 of inside closed, and make it be output as high impedance status, its equivalent circuit diagram then as shown in Figure 4, circuit can provide the audio output of six sound channels at this moment as shown in Figure 4.
By above explanation as can be known, the present invention converts the circuit arrangement of six sound channels output to by the output of two sound channels, the user can listen to six sound channels output on the motherboard of foundation PC99 standard construction, simultaneously, when carrying out the audio output of six sound channels, a left side ring rearmounted sound signal and a right ring rearmounted sound signal can with LINE-IN-L, LINE-IN-R signal common 1 the 3rd filter of input so that further save cost.
Claims (8)
1. one kind converts two sound channels output the circuit arrangement of six sound channels output to, its use a MIC-IN connector, a LINE-IN connector, and a LINE-OUT connector export the audio of six sound channels, it is characterized in that circuit arrangement mainly comprises:
One coding/decoding device, in order to carry out the coding/decoding of sound signal, with sound channel sound signal, low sound effect signal, a left side ring rearmounted sound signal, a right ring rearmounted sound signal, left road sound signal and right road sound signal in the output, and input microphone signal, LINE-IN-L and LINE-IN-R signal, and produce a control signal;
One MIC-IN connector switching device shifter, the control signal according to the coding/decoding device is produced inputs or outputs device so that the MIC-IN connector is switched to;
One first filter, it exports middle sound channel sound signal and the coupling of low sound effect signal that the coding/decoding device is produced to the MIC-IN connector;
One second filter, it will be coupled to the coding/decoding device by the microphone signal of MIC-IN connector input;
One the 3rd filter, it will be coupled to the coding/decoding device by the LINE-IN-L and the LINE-IN-R signal of LINE-IN connector input;
One resistance circuit is that a left side ring rearmounted sound signal and a right ring rearmounted sound signal that the coding/decoding device is produced are coupled to the 3rd filter, to export via the LINE-IN connector.
2. circuit arrangement as claimed in claim 1 is characterized in that, it more comprises a microphone bias voltage circuit, and a microphone bias voltage signal will give suitable bias voltage by the microphone signal of MIC-IN connector input.
3. circuit arrangement as claimed in claim 2, it is characterized in that, wherein, MIC-IN connector switching device shifter is made up of one first switching device shifter and one second switching device shifter, when control signal is electronegative potential, first switching device shifter is coupled to the MIC-IN connector with the microphone bias voltage signal of microphone bias voltage circuit, and the microphone signal that second switching device shifter is imported the MIC-IN connector is filter coupled to the coding/decoding device via second.
4. circuit arrangement as claimed in claim 3, it is characterized in that, wherein, first switching device shifter is made up of the 3rd and the 4th nmos pass transistor, when control signal is electronegative potential, the 3rd nmos pass transistor conducting and the 4th nmos pass transistor is closed, and the microphone signal of input given suitable bias voltage.
5. circuit arrangement as claimed in claim 3 is characterized in that, wherein, second switching device shifter is made up of first and second nmos pass transistor, with when control signal is electronegative potential, first and second nmos pass transistor conducting, and with the input microphone signal be coupled to second filter.
6. circuit arrangement as claimed in claim 1, it is characterized in that, wherein, the coding/decoding device have correspond respectively in sound channel sound signal, low sound effect signal, a left side ring rearmounted sound signal, a right ring rearmounted sound signal, L channel sound signal, and a plurality of digital to analog converters of R channel sound signal, and correspond respectively to a plurality of analog-to-digital converters of microphone signal, LINE-IN-L and LINE-IN-R signal.
7. circuit arrangement as claimed in claim 6, it is characterized in that, wherein, the coding/decoding device is when six sound channels is exported, the relevant digital to analog converter of a rearmounted sound signal, L channel sound signal and R channel sound signal is encircled on sound channel sound signal, low sound effect signal, a left side ring rearmounted sound signal, the right side in the startup, and closes the analog-to-digital converter of microphone signal, LINE-IN-L and the LINE-IN-R signal correction of input.
8. circuit arrangement as claimed in claim 5, it is characterized in that, wherein, when the coding/decoding device is exported at non-six sound channels, sound channel sound signal, low sound effect signal, the rearmounted sound signal in ring field, a left side, the relevant digital to analog converter of a right ring rearmounted sound signal in closing, and the analog-to-digital converter of microphone signal, LINE-IN-L and the LINE-IN-R signal correction of startup input and L channel sound signal and the relevant digital to analog converter of R channel sound signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02142420.9A CN1212751C (en) | 2002-09-17 | 2002-09-17 | Circuit equipment for converting output of two sound channels into output of six sound channels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02142420.9A CN1212751C (en) | 2002-09-17 | 2002-09-17 | Circuit equipment for converting output of two sound channels into output of six sound channels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1413063A CN1413063A (en) | 2003-04-23 |
| CN1212751C true CN1212751C (en) | 2005-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02142420.9A Expired - Lifetime CN1212751C (en) | 2002-09-17 | 2002-09-17 | Circuit equipment for converting output of two sound channels into output of six sound channels |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1212751C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7583805B2 (en) * | 2004-02-12 | 2009-09-01 | Agere Systems Inc. | Late reverberation-based synthesis of auditory scenes |
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2002
- 2002-09-17 CN CN02142420.9A patent/CN1212751C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1413063A (en) | 2003-04-23 |
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Granted publication date: 20050727 |
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