CN105516543A - High-definition image processing system based on constant-voltage driving circuit - Google Patents
High-definition image processing system based on constant-voltage driving circuit Download PDFInfo
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- CN105516543A CN105516543A CN201510852285.6A CN201510852285A CN105516543A CN 105516543 A CN105516543 A CN 105516543A CN 201510852285 A CN201510852285 A CN 201510852285A CN 105516543 A CN105516543 A CN 105516543A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/148—Video amplifiers
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Abstract
The invention discloses a high-definition image processing system based on a constant-voltage driving circuit. The high-definition image processing system is characterized by mainly comprising a single-chip microcomputer, a signal processing unit, a storage, a decoder, an image encoder, a conversion unit, an image signal acquisition unit, the constant-voltage driving circuit and a display, wherein the signal processing unit, the storage and the decoder are connected with the single-chip microcomputer respectively; the image encoder is connected with the signal processing unit; the conversion unit is connected with the image encoder; the image signal acquisition unit is connected with the conversion unit; the constant-voltage driving circuit is connected with the decoder; and the display is connected with the constant-voltage driving circuit. Through the signal processing unit, acquired image signals can be amplified in an undistorted way, and image noise can be filtered, so that images can be played more clearly. Meanwhile, the display is driven through the constant-voltage driving circuit and works more stably, so that a better display effect is achieved.
Description
Technical field
The present invention relates to image processing field, specifically refer to a kind of high-definition image treatment system based on constant voltage drive circuit.
Background technology
Along with the living standard of people improves constantly, video camera has become amusement equipment important in people's life, can record the drop in oneself life by video camera people.But people are when reviewing video recording, because existing image processing system easily causes picture signal distortion when processing picture signal, so it is unintelligible to cause video recording to be play, have a strong impact on the viewing effect of people to video recording.
Summary of the invention
The object of the invention is to overcome existing image processing system easily causes picture signal distortion defect when processing picture signal, a kind of high-definition image treatment system based on constant voltage drive circuit is provided.
Object of the present invention is achieved through the following technical solutions: a kind of high-definition image treatment system based on constant voltage drive circuit, primarily of single-chip microcomputer, the signal processing unit be connected with single-chip microcomputer respectively, memory and decoder, the image encoder be connected with signal processing unit, the converting unit be connected with image encoder, the picture signal collecting unit be connected with converting unit, the constant voltage drive circuit be connected with decoder, and the display be connected with constant voltage drive circuit forms.
Further, described constant voltage drive circuit is by triode VT5, field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3, field effect transistor MOS4, positive pole is connected with the source electrode of field effect transistor MOS1, the electric capacity C7 of minus earth, negative pole is connected with the emitter of triode VT5, the electric capacity C8 that positive pole is then connected with the grid of field effect transistor MOS4 after resistance R10, one end is connected with the positive pole of electric capacity C8, the resistance R11 that the other end is then connected with the grid of field effect transistor MOS3 after resistance R12, N pole is connected with the positive pole of electric capacity C8, the voltage stabilizing didoe D5 that P pole is then connected with the emitter of triode VT5, N pole is connected with the collector electrode of triode VT5, the voltage stabilizing didoe D4 that P pole is then connected with the grid of field effect transistor MOS1, P pole is connected with the base stage of triode VT5, the voltage stabilizing didoe D6 that N pole is then connected with the grid of field effect transistor MOS2 after electric capacity C9, and one end is connected with the drain electrode of field effect transistor MOS1, the inductance L 1 that the other end is then connected with the drain electrode of field effect transistor MOS2 forms, the source electrode of described field effect transistor MOS1 jointly form the input of this constant voltage drive circuit with its grid and be connected with decoder, it drains and is then connected with the drain electrode of field effect transistor MOS4, the source electrode of described field effect transistor MOS2 extremely jointly form the output of this constant voltage drive circuit with the N of voltage stabilizing didoe D6 and be connected with display, its drain electrode is then connected with the drain electrode of field effect transistor MOS3, ground connection while the source electrode of described field effect transistor MOS3 is connected with the source electrode of field effect transistor MOS4.
Further, described signal processing unit by emitter differential amplifier circuit, the compensating circuit be connected with emitter differential amplifier circuit, and the constant voltage circuit be connected with compensating circuit respectively and RC filter circuit form; The input of described emitter differential amplifier circuit is connected with image encoder, and the output of this RC filter circuit is then connected with single-chip microcomputer.
Described emitter differential amplifier circuit is by triode VT1, amplifier P, N pole is connected with the collector electrode of triode VT1, the voltage stabilizing didoe D1 of P pole ground connection, positive pole is connected with the emitter of triode VT1 after resistance R2, the electric capacity C1 that negative pole is then connected with the positive pole of amplifier P, be serially connected in the resistance R3 between the negative pole of amplifier P and output, positive pole is connected with the collector electrode of triode VT1 after resistance R1, negative pole is then in turn through electric capacity C3 that resistance R5 is connected with the output of amplifier P after resistance R4, and form with the electric capacity C2 that resistance R4 is in parallel, the output of described amplifier P, the base stage of triode VT1 are all connected with compensating circuit with the positive pole of electric capacity C3, the plus earth of described electric capacity C1, the positive pole of electric capacity C3 then forms the input of this emitter differential amplifier circuit jointly with the positive pole of electric capacity C1.
Described compensating circuit is by process chip U, triode VT2, the diode D2 that N pole is connected with the base stage of triode VT2, P pole is then connected with the CS pin of process chip U, be serially connected in the resistance R6 between the positive pole of electric capacity C3 and the collector electrode of triode VT2, N pole is connected with the collector electrode of triode VT2, the voltage stabilizing didoe D3 of P pole ground connection, and while positive pole is connected with the RL pin of process chip U, negative pole is then connected with the GATE pin of process chip U, the electric capacity C4 of ground connection forms; The LD pin of described process chip U is connected with the output of amplifier P, its GND pin ground connection, its VIN pin is then connected with constant voltage circuit, PWM pin is then connected with RC filter circuit, ROTP pin is then connected with the emitter of triode VT2; The base stage of described triode VT2 is connected with the base stage of triode VT1; The positive pole of described electric capacity C3 is also connected with RC filter circuit.
Described constant voltage circuit is by triode VT3, triode VT4, be serially connected in the resistance R9 between the base stage of triode VT3 and the collector electrode of triode VT4, positive pole be connected with the base stage of triode VT4, the electric capacity C6 of minus earth, and to form with the resistance R8 that electric capacity C6 is in parallel; The collector electrode of described triode VT4 connects 15V voltage, its emitter is then connected with the negative pole of electric capacity C6, its base stage is then connected with the emitter of triode VT3; The collector electrode of described triode VT3 is then connected with the VIN pin of process chip U.
The electric capacity C5 that described RC filter circuit is connected with the positive pole of electric capacity C3 by positive pole, negative pole is then connected with the PWM pin of process chip U, and form with the resistance R7 that electric capacity C5 is in parallel; The positive pole of described electric capacity C5 and negative pole then form the output of this RC filter circuit jointly.
Described process chip U is AX9021 integrated chip.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention can carry out distortionless amplification to the picture signal collected by signal processing unit, and it can also filter picture noise in addition, thus it is more clear that image can be made to play.
(2) structure of the present invention is simple, volume is little, is convenient to extensive popularization.
(3) the present invention is driven display by constant voltage drive circuit, makes display work more stable, thus reaches better display effect.
Accompanying drawing explanation
Fig. 1 is overall structure block diagram of the present invention.
Fig. 2 is the circuit structure diagram of signal processing unit of the present invention.
Fig. 3 is the structure chart of constant voltage drive circuit of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, high-definition image treatment system based on constant voltage drive circuit of the present invention, primarily of single-chip microcomputer, the signal processing unit be connected with single-chip microcomputer respectively, memory and decoder, the image encoder be connected with signal processing unit, the converting unit be connected with image encoder, the picture signal collecting unit be connected with converting unit, the constant voltage drive circuit be connected with decoder, and the display be connected with constant voltage drive circuit forms.
Wherein, picture signal collecting unit is used for gathering picture signal, and its HMP-I image series acquisition module that Beijing Run Guangkaiqin development in science and technology Co., Ltd can be selected to produce realizes.Converting unit is used for being converted to digital electric signal to the picture signal that picture signal collecting unit collects, and it adopts existing analog-to-digital conversion module to realize.Image encoder is used for compressing image, its APG-DVS-3704FD-B type video encoder preferentially using Shanghai Ai Puhuadun Science and Technology Ltd. to produce.Signal processing unit is used for processing picture signal.Single-chip microcomputer is then as control centre of the present invention, and the TMS320C6211 type high speed numerical processor that it preferentially adopts Texas Instrument to produce realizes.Decoder is then for carrying out decompress(ion) to image, and its APG-DVD-3909HD-5U type Video Decoder preferentially adopting Shanghai Ai Puhuadun Science and Technology Ltd. to produce realizes.Memory is used for storing image, and constant voltage drive circuit then works for stable driving display, and display is then for showing image, and this memory and display all adopt existing technology to realize.
As shown in Figure 2, this signal processing unit by emitter differential amplifier circuit, the compensating circuit be connected with emitter differential amplifier circuit, and the constant voltage circuit be connected with compensating circuit respectively and RC filter circuit form.The input of described emitter differential amplifier circuit is connected with image encoder, and the output of this RC filter circuit is then connected with single-chip microcomputer.
Described emitter differential amplifier circuit can carry out distortionless amplification to picture signal, and it is by triode VT1, amplifier P, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1, electric capacity C2, electric capacity C3, and voltage stabilizing didoe D1 forms.
During connection, the N pole of voltage stabilizing didoe D1 is connected with the collector electrode of triode VT1, its P pole ground connection.The positive pole of electric capacity C1 is connected with the emitter of triode VT1 after resistance R2, its negative pole is then connected with the positive pole of amplifier P.Between the negative pole that resistance R3 is then serially connected in amplifier P and output.The positive pole of electric capacity C3 is connected with the collector electrode of triode VT1 after resistance R1, its negative pole is connected with the positive pole of electric capacity C2 after resistance R5.The negative pole of described electric capacity C2 is then connected with the output of amplifier P; Resistance R4 is then in parallel with electric capacity C2.The output of described amplifier P, the base stage of triode VT1 are all connected with compensating circuit with the positive pole of electric capacity C3.The plus earth of described electric capacity C1, the positive pole of electric capacity C3 then forms the input of this emitter differential amplifier circuit jointly with the positive pole of electric capacity C1.
Wherein, triode VT1, resistance R1 and resistance R2 form biasing circuit, and it can guarantee that picture signal is undistorted after amplification, and voltage stabilizing didoe D1 then can protect triode VT1.
Emitter differential amplifier circuit can make picture signal occur certain Frequency Shift when carrying out amplification process to picture signal, make emitter differential amplifier circuit job insecurity, even vibrate, described compensating circuit then can carry out phase compensation to picture signal, makes the work of emitter differential amplifier circuit more stable.This emitter differential amplifier circuit is by process chip U, and triode VT2, electric capacity C4, diode D2, voltage stabilizing didoe D3 and resistance R6 form.
During connection, the N pole of this diode D2 is connected with the base stage of triode VT2, its P pole is then connected with the CS pin of process chip U.Resistance R6 is then serially connected between the positive pole of electric capacity C3 and the collector electrode of triode VT2.The N pole of voltage stabilizing didoe D3 is connected with the collector electrode of triode VT2, its P pole ground connection.Ground connection while the positive pole of electric capacity C4 is connected with the RL pin of process chip U, its negative pole is then connected with the GATE pin of process chip U.
Meanwhile, the LD pin of described process chip U is connected with the output of amplifier P, its GND pin ground connection, its VIN pin is then connected with constant voltage circuit, PWM pin is then connected with RC filter circuit, ROTP pin is then connected with the emitter of triode VT2.The base stage of described triode VT2 is connected with the base stage of triode VT1; The positive pole of described electric capacity C3 is also connected with RC filter circuit.In order to reach better implementation result, described process chip U is preferably AX9021 integrated chip to realize.
Described constant voltage circuit can provide stable operating voltage to signal processing unit, and it is by triode VT3, triode VT4, resistance R8, and resistance R9 and electric capacity C6 forms.Described resistance R9 is serially connected between the base stage of triode VT3 and the collector electrode of triode VT4.The positive pole of electric capacity C6 is connected with the base stage of triode VT4, its minus earth.Resistance R8 is then in parallel with electric capacity C6.The collector electrode of described triode VT4 connects 15V voltage, its emitter is then connected with the negative pole of electric capacity C6, its base stage is then connected with the emitter of triode VT3.The collector electrode of described triode VT3 is then connected with the VIN pin of process chip U.
Described RC filter circuit can filter the image noise in picture signal, the electric capacity C5 that it is connected with the positive pole of electric capacity C3 by positive pole, negative pole is then connected with the PWM pin of process chip U, and forms with the resistance R7 that electric capacity C5 is in parallel.The positive pole of described electric capacity C5 then jointly forms the output of this RC filter circuit with negative pole and is connected with single-chip microcomputer.
As shown in Figure 3, described constant voltage drive circuit is by triode VT5, field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3, field effect transistor MOS4, resistance R10, resistance R11, resistance R12, voltage stabilizing didoe D4, voltage stabilizing didoe D5, voltage stabilizing didoe D6, electric capacity C7, electric capacity C8 and electric capacity C9 form.
During connection, the positive pole of electric capacity C7 is connected with the source electrode of field effect transistor MOS1, its minus earth.The negative pole of electric capacity C8 is connected with the emitter of triode VT5, its positive pole is then connected with the grid of field effect transistor MOS4 after resistance R10.One end of resistance R11 is connected with the positive pole of electric capacity C8, its other end is then connected with the grid of field effect transistor MOS3 after resistance R12.The N pole of voltage stabilizing didoe D5 is connected with the positive pole of electric capacity C8, its P pole is then connected with the emitter of triode VT5.The N pole of voltage stabilizing didoe D4 is connected with the collector electrode of triode VT5, its P pole is then connected with the grid of field effect transistor MOS1.The P pole of voltage stabilizing didoe D6 is connected with the base stage of triode VT5, its N pole is then connected with the negative pole of electric capacity C9.The positive pole of electric capacity C9 is then connected with the grid of field effect transistor MOS2.One end of inductance L 1 is connected with the drain electrode of field effect transistor MOS1, its other end is then connected with the drain electrode of field effect transistor MOS2.
Meanwhile, the source electrode of described field effect transistor MOS1 jointly form the input of this constant voltage drive circuit with its grid and be connected with decoder, it drains and is then connected with the drain electrode of field effect transistor MOS4; The source electrode of described field effect transistor MOS2 extremely jointly form the output of this constant voltage drive circuit with the N of voltage stabilizing didoe D6 and be connected with display, its drain electrode is then connected with the drain electrode of field effect transistor MOS3; Ground connection while the source electrode of described field effect transistor MOS3 is connected with the source electrode of field effect transistor MOS4.
This field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3 and field effect transistor MOS4 form a gate driver circuit.And triode VT5, voltage stabilizing didoe D4, voltage stabilizing didoe D5 and voltage stabilizing didoe D6 then forms a constant voltage circuit, and it can guarantee that gate driver circuit has a constant operating voltage.Electric capacity C8 and electric capacity C9 then strobes, and makes the driving display that gate driver circuit can be more stable.
During work, picture signal collecting unit gathers picture signal and is transferred to converting unit and is converted to digital electric signal, image encoder sends signal processing unit to after image is compressed, single-chip microcomputer is sent to after picture signal being processed by signal processing unit, single-chip microcomputer sends to memory storage after identifying picture signal, simultaneously, single-chip microcomputer also sends to decoder to carry out decompress(ion) picture signal, the driving display that picture signal after decompress(ion) is stable after constant voltage drive circuit, display is then play image.
As mentioned above, just well the present invention can be implemented.
Claims (8)
1. the high-definition image treatment system based on constant voltage drive circuit, it is characterized in that, primarily of single-chip microcomputer, the signal processing unit be connected with single-chip microcomputer respectively, memory and decoder, the image encoder be connected with signal processing unit, the converting unit be connected with image encoder, the picture signal collecting unit be connected with converting unit, the constant voltage drive circuit be connected with decoder, and the display be connected with constant voltage drive circuit forms.
2. a kind of high-definition image treatment system based on constant voltage drive circuit according to claim 1, it is characterized in that, described constant voltage drive circuit is by triode VT5, field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3, field effect transistor MOS4, positive pole is connected with the source electrode of field effect transistor MOS1, the electric capacity C7 of minus earth, negative pole is connected with the emitter of triode VT5, the electric capacity C8 that positive pole is then connected with the grid of field effect transistor MOS4 after resistance R10, one end is connected with the positive pole of electric capacity C8, the resistance R11 that the other end is then connected with the grid of field effect transistor MOS3 after resistance R12, N pole is connected with the positive pole of electric capacity C8, the voltage stabilizing didoe D5 that P pole is then connected with the emitter of triode VT5, N pole is connected with the collector electrode of triode VT5, the voltage stabilizing didoe D4 that P pole is then connected with the grid of field effect transistor MOS1, P pole is connected with the base stage of triode VT5, the voltage stabilizing didoe D6 that N pole is then connected with the grid of field effect transistor MOS2 after electric capacity C9, and one end is connected with the drain electrode of field effect transistor MOS1, the inductance L 1 that the other end is then connected with the drain electrode of field effect transistor MOS2 forms, the source electrode of described field effect transistor MOS1 jointly form the input of this constant voltage drive circuit with its grid and be connected with decoder, it drains and is then connected with the drain electrode of field effect transistor MOS4, the source electrode of described field effect transistor MOS2 extremely jointly form the output of this constant voltage drive circuit with the N of voltage stabilizing didoe D6 and be connected with display, its drain electrode is then connected with the drain electrode of field effect transistor MOS3, ground connection while the source electrode of described field effect transistor MOS3 is connected with the source electrode of field effect transistor MOS4.
3. a kind of high-definition image treatment system based on constant voltage drive circuit according to claim 2, it is characterized in that, described signal processing unit is by emitter differential amplifier circuit, the compensating circuit be connected with emitter differential amplifier circuit, and the constant voltage circuit be connected with compensating circuit respectively and RC filter circuit form; The input of described emitter differential amplifier circuit is connected with image encoder, and the output of this RC filter circuit is then connected with single-chip microcomputer.
4. a kind of high-definition image treatment system based on constant voltage drive circuit according to claim 3, it is characterized in that, described emitter differential amplifier circuit is by triode VT1, amplifier P, N pole is connected with the collector electrode of triode VT1, the voltage stabilizing didoe D1 of P pole ground connection, positive pole is connected with the emitter of triode VT1 after resistance R2, the electric capacity C1 that negative pole is then connected with the positive pole of amplifier P, be serially connected in the resistance R3 between the negative pole of amplifier P and output, positive pole is connected with the collector electrode of triode VT1 after resistance R1, negative pole is then in turn through electric capacity C3 that resistance R5 is connected with the output of amplifier P after resistance R4, and form with the electric capacity C2 that resistance R4 is in parallel, the output of described amplifier P, the base stage of triode VT1 are all connected with compensating circuit with the positive pole of electric capacity C3, the plus earth of described electric capacity C1, the positive pole of electric capacity C3 then forms the input of this emitter differential amplifier circuit jointly with the positive pole of electric capacity C1.
5. a kind of high-definition image treatment system based on constant voltage drive circuit according to claim 4, it is characterized in that, described compensating circuit is by process chip U, triode VT2, N pole is connected with the base stage of triode VT2, the diode D2 that P pole is then connected with the CS pin of process chip U, be serially connected in the resistance R6 between the positive pole of electric capacity C3 and the collector electrode of triode VT2, N pole is connected with the collector electrode of triode VT2, the voltage stabilizing didoe D3 of P pole ground connection, and positive pole is connected with the RL pin of process chip U, while negative pole is then connected with the GATE pin of process chip U, the electric capacity C4 of ground connection forms, the LD pin of described process chip U is connected with the output of amplifier P, its GND pin ground connection, its VIN pin is then connected with constant voltage circuit, PWM pin is then connected with RC filter circuit, ROTP pin is then connected with the emitter of triode VT2, the base stage of described triode VT2 is connected with the base stage of triode VT1, the positive pole of described electric capacity C3 is also connected with RC filter circuit.
6. a kind of high-definition image treatment system based on constant voltage drive circuit according to claim 5, it is characterized in that, described constant voltage circuit is by triode VT3, triode VT4, be serially connected in the resistance R9 between the base stage of triode VT3 and the collector electrode of triode VT4, positive pole is connected with the base stage of triode VT4, the electric capacity C6 of minus earth, and forms with the resistance R8 that electric capacity C6 is in parallel; The collector electrode of described triode VT4 connects 15V voltage, its emitter is then connected with the negative pole of electric capacity C6, its base stage is then connected with the emitter of triode VT3; The collector electrode of described triode VT3 is then connected with the VIN pin of process chip U.
7. a kind of high-definition image treatment system based on constant voltage drive circuit according to claim 6, it is characterized in that, the electric capacity C5 that described RC filter circuit is connected with the positive pole of electric capacity C3 by positive pole, negative pole is then connected with the PWM pin of process chip U, and form with the resistance R7 that electric capacity C5 is in parallel; The positive pole of described electric capacity C5 and negative pole then form the output of this RC filter circuit jointly.
8. a kind of high-definition image treatment system based on constant voltage drive circuit according to claim 7, it is characterized in that, described process chip U is AX9021 integrated chip.
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| CN201510852285.6A CN105516543A (en) | 2015-11-27 | 2015-11-27 | High-definition image processing system based on constant-voltage driving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108259704A (en) * | 2018-03-23 | 2018-07-06 | 深圳市豪恩汽车电子装备股份有限公司 | vehicle-mounted camera video output circuit |
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2015
- 2015-11-27 CN CN201510852285.6A patent/CN105516543A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108259704A (en) * | 2018-03-23 | 2018-07-06 | 深圳市豪恩汽车电子装备股份有限公司 | vehicle-mounted camera video output circuit |
| CN108259704B (en) * | 2018-03-23 | 2024-04-30 | 深圳市豪恩汽车电子装备股份有限公司 | Video output circuit of vehicle-mounted camera |
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