CN210431639U - Conversion device for converting network video into AV video - Google Patents
Conversion device for converting network video into AV video Download PDFInfo
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- CN210431639U CN210431639U CN201921293261.1U CN201921293261U CN210431639U CN 210431639 U CN210431639 U CN 210431639U CN 201921293261 U CN201921293261 U CN 201921293261U CN 210431639 U CN210431639 U CN 210431639U
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Abstract
The utility model discloses a network video changes AV video conversion device, including network input port, DSP chip, H.265 decoder, frame rate converter, digital/analog converter and AV output port, network input port with the one end of DSP chip is connected, the other end of DSP chip with the one end of H.265 decoder is connected, the other end of H.265 decoder with the one end of frame rate converter is connected, the other end of frame rate converter with digital/analog converter's one end is connected, digital/analog converter's the other end with AV output port connects. Implement the utility model discloses a conversion equipment of network video to AV video has following beneficial effect: the method can adapt to the resolution, can be converted into AV video stream, and meets the requirements of users.
Description
Technical Field
The utility model relates to a video image output conversion field, in particular to conversion equipment that network video changes AV video.
Background
The VGA/YPBP/HDMI converters currently on the market, which convert video images into AV, are basically point-to-point conversion, and cannot change the resolution, especially cannot adapt to the highest resolution of the display device. In addition, the video converter on the market at present cannot convert a network video stream into an AV video stream, and cannot meet the user's demand.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide one kind can self-adaptation resolution ratio, can convert AV video stream, satisfy the network video of user's demand to AV video conversion equipment.
The utility model provides a technical scheme that its technical problem adopted is: the conversion device for converting the network video into the AV video comprises a network input port, a DSP chip, an H.265 decoder, a frame rate converter, a digital-to-analog converter and an AV output port, wherein the network input port is connected with one end of the DSP chip, the other end of the DSP chip is connected with one end of the H.265 decoder, the other end of the H.265 decoder is connected with one end of the frame rate converter, the other end of the frame rate converter is connected with one end of the digital-to-analog converter, and the other end of the digital-to-analog converter is connected with the AV output port.
In the device for converting a network video into an AV video of the present invention, the network input port inputs a network video stream conforming to the ONVIF protocol.
In the device for converting network video into AV video of the present invention, the device further comprises a power module, the power module is connected to the digital/analog converter, the power module comprises a power source, a first resistor, a first button, a first unidirectional thyristor, a third resistor, a first triode, a second unidirectional thyristor, a second resistor, a first diode, a first capacitor, a second triode, a fourth resistor, a fifth resistor and a voltage output terminal, the power source is connected to one end of the first resistor, an anode of the first unidirectional thyristor, a collector of the first triode and an anode of the second unidirectional thyristor, the other end of the first resistor is connected to one end of the first button, the other end of the first button is connected to a control electrode of the first unidirectional thyristor, a cathode of the first unidirectional thyristor is connected to one end of the third resistor and a base of the first triode respectively, the other end of the third resistor is respectively connected with the emitting electrode of the first triode, one end of the first capacitor, the collecting electrode of the second triode, one end of the fourth resistor and the voltage output end, the control electrode of the second unidirectional thyristor is connected with the cathode of the first diode, the anode of the first diode is connected with the emitting electrode of the second triode, the other end of the first capacitor is respectively connected with the cathode of the second unidirectional thyristor and one end of the second resistor, the base of the second triode is respectively connected with the other end of the fourth resistor and one end of the fifth resistor, the other end of the second resistor and the other end of the fifth resistor are both grounded, and the model of the first diode is S-202T.
In the device for converting network video into AV video, the power module further includes a second diode, an anode of the second diode is connected to the other end of the third resistor, a cathode of the second diode is connected to a collector of the second triode, and a model of the second diode is S-352T.
In the device for converting network video into AV video of the present invention, the first triode is an NPN-type triode.
In the device for converting network video into AV video of the present invention, the second triode is an NPN-type triode.
Implement the utility model discloses a conversion equipment of network video to AV video has following beneficial effect: owing to be equipped with network input port, DSP chip, H.265 decoder, frame rate converter, digital/analog converter and AV output port, frame rate converter is used for the automatic adaptation output device resolution ratio, and AV output port is used for exporting the AV video stream, the utility model discloses can self-adaptation resolution ratio, can convert AV video stream, satisfy the user demand into.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a device for converting a network video into an AV video according to the present invention;
fig. 2 is a schematic circuit diagram of the power supply module in the embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the embodiment of the device for converting network video into AV video of the present invention, a schematic structural diagram of the device for converting network video into AV video is shown in fig. 1. In fig. 1, the device for converting network video into AV video includes a network input port 1, a DSP chip 2, an h.265 decoder 3, a frame rate converter 4, a digital/analog converter 5 and an AV output port 6, where the network input port 1 is connected to one end of the DSP chip 2, the other end of the DSP chip 2 is connected to one end of the h.265 decoder 3, the other end of the h.265 decoder 3 is connected to one end of the frame rate converter 4, the other end of the frame rate converter 4 is connected to one end of the digital/analog converter 6, and the other end of the digital/analog converter 5 is connected to the AV output port 6.
The network input port 1 inputs the network video stream conforming to the ONVIF protocol, the network video stream is decompressed by the DSP chip 2 and then decoded by the h.265 decoder 3, the decoded video stream is frame rate converted by the frame rate converter 4, the frame rate converted video stream is converted into an analog signal by the digital/analog converter 5 to obtain an AV video stream, and the AV video stream is output from the AV output port 6. The h.265 decoder 3 can provide better visual quality.
The utility model solves the problem that the AV video output converter in the prior art can not automatically identify the resolution ratio; the function of converting network video into AV video output is added. The utility model discloses can self-adaptation resolution ratio, can convert AV video stream, satisfy the user demand into.
In this embodiment, the apparatus for converting network video into AV video further includes a power module 7, and the power module 7 is connected to the digital-to-analog converter 5. Fig. 2 is a schematic circuit diagram of the power module in this embodiment, in fig. 2, the power module 7 includes a power source VCC, a first resistor R1, a first key S1, a first unidirectional thyristor U1, a third resistor R3, a first triode Q1, a second unidirectional thyristor U2, a second resistor R2, a first diode D1, a first capacitor C1, a second triode Q2, a fourth resistor R4, a fifth resistor R5, and a voltage output Vo, wherein the power source VCC is respectively connected to one end of the first resistor R1, the anode of the first unidirectional thyristor U1, the collector of the first triode Q1, and the anode of the second unidirectional thyristor U2, the other end of the first resistor R1 is connected to one end of the first key S1, the other end of the first key S1 is connected to the control electrode of the first unidirectional thyristor U1, the cathode of the first unidirectional thyristor U1 is respectively connected to one end of the base of the third resistor R3 and the base of the first triode Q1, the other end of the third resistor R3 is connected to an emitter of the first triode Q1, one end of the first capacitor C1, a collector of the second triode Q2, one end of the fourth resistor R4 and the voltage output end Vo respectively, a control electrode of the second unidirectional thyristor U2 is connected to a cathode of the first diode D1, an anode of the first diode D1 is connected to an emitter of the second triode Q2, the other end of the first capacitor C1 is connected to a cathode of the second unidirectional thyristor U2 and one end of the second resistor R2 respectively, a base of the second triode Q2 is connected to the other end of the fourth resistor R4 and one end of the fifth resistor R5 respectively, and the other end of the second resistor R2 and the other end of the fifth resistor R5 are both grounded.
In this embodiment, the first diode D1 is a current limiting diode for performing current limiting protection on the emitter current of the second transistor Q2. The current limiting protection principle is as follows: when the emitter current of the second triode Q2 is large, the first diode D1 can reduce the emitter current of the second triode Q2 to keep the second triode Q2 in a normal working state, and the elements in the circuit are not burnt out due to too large current, so that the safety and reliability of the circuit are high.
It should be noted that in the present embodiment, the first diode D1 has a model number S-202T. Of course, in practical applications, the first diode D1 may also be another type of diode with similar functions.
In this embodiment, the voltage supplied by the power source VCC is 12V. Certainly, in practical applications, the voltage provided by the power source VCC may be adjusted according to specific situations, that is, the voltage provided by the power source VCC may be increased or decreased according to specific situations.
In this embodiment, the first transistor Q1 is an NPN transistor. The second transistor Q2 is an NPN transistor. The first transistor Q1 and the second transistor Q2 are both 2N 3904. Of course, in practical applications, the first transistor Q1 and the second transistor Q2 may be PNP transistors, but the circuit structure is changed accordingly. In this embodiment, the models of the first unidirectional thyristor U1 and the second unidirectional thyristor U2 both adopt 2N 6565.
The utility model discloses a theory of operation is: the first unidirectional thyristor U1, the first triode Q1 and the third resistor R3 form an overcurrent detection protection circuit, the second unidirectional thyristor U2, the second triode Q2, the second resistor R2, the first capacitor C2 and other components form an overvoltage detection protection circuit, the first resistor R1 and the first key S1 form a starting control circuit, when the load is normal, the first key S1 is pressed, the control electrode of the first unidirectional thyristor U1 is triggered to be conducted, the voltage output end Vo supplies power to the load, because the voltage at two ends of the third resistor R3 is not enough to conduct the first triode Q1, the load is normal, when the load is aggravated due to short circuit or other faults, the voltage drop at two ends of the third resistor R3 is increased, when the voltage of a gate line of the first triode Q1 is exceeded, the first triode Q1 is conducted, the current of the first unidirectional U1 is smaller than the on-maintaining current and is cut off, and because the first unidirectional thyristor U1 and the third thyristor R3 bypass the current when the first triode Q1 is conducted, therefore, the first unidirectional thyristor U1 is cut off, the first triode Q1 is also cut off, and the power supply is cut off, so that the aim of overcurrent protection is fulfilled.
When the voltage of the power supply VCC rises and exceeds an overvoltage critical value, the corresponding voltage output end Vo also rises, the voltage divided by the fifth resistor R5 and the fourth resistor R4 rises, the second triode Q2 is conducted, the second unidirectional thyristor U2 is conducted, the voltage at the two ends of the first capacitor C1 is added to the two ends of the first unidirectional thyristor U1 through the second unidirectional thyristor U2, so that the first unidirectional thyristor U1 is cut off due to the fact that reverse voltage is obtained, the power supply load is cut off, after the second unidirectional thyristor U2 is conducted, as the resistance value of the second resistor R2 is large, the flowing current is small, the conduction of the second unidirectional thyristor U2 cannot be maintained, and therefore the second unidirectional thyristor U2 is cut off accordingly, and the circuit recovers the initial state.
In this embodiment, the power module 7 further includes a second diode D2, an anode of the second diode D2 is connected to the other end of the third resistor R3, and a cathode of the second diode D2 is connected to a collector of the second transistor Q2. The second diode D2 is a current limiting diode, and is used for current limiting protection of the collector current of the second transistor Q2. The current limiting protection principle is as follows: when the collector current of the second triode Q2 is large, the second diode D2 can reduce the collector current of the second triode Q2 to keep the second triode Q2 in a normal working state, so that the device in the circuit is not burned out due to too large current, and the safety and reliability of the circuit are further enhanced.
It should be noted that in the present embodiment, the second diode D2 has a model number S-352T. Of course, in practical applications, the second diode D2 may also be another type of diode with similar functions.
The utility model discloses support the ONVIF agreement, can support NVR recorded broadcast, network input port 1 adopts 100M full duplex mode, supports dual stream output, supports stream resolution ratio setting, supports LAN, wide area network WAN transmission.
In summary, in this embodiment, because the network input port 1, the DSP chip 2, the h.265 decoder 3, the frame rate converter 4, the digital-to-analog converter 5 and the AV output port 6 are provided, the frame rate converter 4 can perform the conversion of the frame rate, and the AV output port 6 is used for outputting the AV video stream, the utility model discloses can self-adaptive resolution, can convert into the AV video stream, satisfy the user's demand.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The device for converting the network video into the AV video is characterized by comprising a network input port, a DSP chip, an H.265 decoder, a frame rate converter, a digital-to-analog converter and an AV output port, wherein the network input port is connected with one end of the DSP chip, the other end of the DSP chip is connected with one end of the H.265 decoder, the other end of the H.265 decoder is connected with one end of the frame rate converter, the other end of the frame rate converter is connected with one end of the digital-to-analog converter, and the other end of the digital-to-analog converter is connected with the AV output port.
2. The apparatus for converting network video into AV video according to claim 1, wherein the network input port inputs a network video stream conforming to ONVIF protocol.
3. The device for converting network video into AV video according to claim 1 or 2, further comprising a power module, wherein the power module is connected to the digital-to-analog converter, the power module comprises a power source, a first resistor, a first button, a first unidirectional thyristor, a third resistor, a first triode, a second unidirectional thyristor, a second resistor, a first diode, a first capacitor, a second triode, a fourth resistor, a fifth resistor, and a voltage output terminal, the power source is respectively connected to one end of the first resistor, an anode of the first unidirectional thyristor, a collector of the first triode, and an anode of the second unidirectional thyristor, the other end of the first resistor is connected to one end of the first button, the other end of the first button is connected to a control electrode of the first unidirectional thyristor, and a cathode of the first unidirectional thyristor is respectively connected to one end of the third resistor and a base of the first triode, the other end of the third resistor is respectively connected with the emitting electrode of the first triode, one end of the first capacitor, the collecting electrode of the second triode, one end of the fourth resistor and the voltage output end, the control electrode of the second unidirectional thyristor is connected with the cathode of the first diode, the anode of the first diode is connected with the emitting electrode of the second triode, the other end of the first capacitor is respectively connected with the cathode of the second unidirectional thyristor and one end of the second resistor, the base of the second triode is respectively connected with the other end of the fourth resistor and one end of the fifth resistor, the other end of the second resistor and the other end of the fifth resistor are both grounded, and the model of the first diode is S-202T.
4. The device for converting a network video into an AV video according to claim 3, wherein the power module further comprises a second diode, an anode of the second diode is connected to the other end of the third resistor, a cathode of the second diode is connected to a collector of the second transistor, and the second diode has a model of S-352T.
5. The apparatus according to claim 4, wherein the first transistor is an NPN transistor.
6. The apparatus according to claim 4, wherein the second transistor is an NPN transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921293261.1U CN210431639U (en) | 2019-08-09 | 2019-08-09 | Conversion device for converting network video into AV video |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921293261.1U CN210431639U (en) | 2019-08-09 | 2019-08-09 | Conversion device for converting network video into AV video |
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| Publication Number | Publication Date |
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| CN210431639U true CN210431639U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921293261.1U Active CN210431639U (en) | 2019-08-09 | 2019-08-09 | Conversion device for converting network video into AV video |
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- 2019-08-09 CN CN201921293261.1U patent/CN210431639U/en active Active
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