CN200962631Y

CN200962631Y - Machine core circuit of TV receiver

Info

Publication number: CN200962631Y
Application number: CNU2006200113265U
Authority: CN
Inventors: 洪烨
Original assignee: Qingdao Hisense Electronics Co Ltd
Current assignee: Qingdao Hisense Electronics Co Ltd
Priority date: 2006-10-19
Filing date: 2006-10-19
Publication date: 2007-10-17
Anticipated expiration: 2016-10-19

Abstract

The utility model discloses movement circuit of a television receiver for simplifying circuit structure of the movement circuit and hoisting reliability and stability of system operation, which comprises a radio-frequency head for receiving radio television signal, AV terminal, VGA terminal, YPBPR terminal, and superintegration single processing chip for integrating processing module of audio signal and video signal. The video signal input terminal is separately connected with a video signal output terminal of the radio-frequency head, a video signal output terminal of the VGA terminal and a high-definition color-minus brightness signal output terminal of the YPBPR terminal. The audio signal input terminal is separately connected with an audio signal output terminal of the radio-frequency head, an audio signal output terminal of the VGA terminal and a sound signal output terminal of the YPBPR terminal. The video signal output terminal is connected with video screen circuit and the audio signal output terminal is connected with power amplifier circuit, thereby driving loudspeaker output by the power amplifier circuit.

Description

The movement circuit of television receiver

Technical field

The utility model belongs to technical field of television sets, relates to a kind of improvement of TV set circuit, specifically, relates to a kind of for simplifying the movement circuit design that the Core of TV set board structure of circuit adopts the high integration single-chip to realize.

Background technology

The movement system of a basic panel TV receiver divides from function, comprising: power supply, radio frequency reception, video decode, SCALER size normalized, sound demodulation, sound accompaniment processing, audio power amplifier, microcontroller.Support input of YPBPR high definition aberration or the input of VGA signal if desired, also need to increase analog to digital converter ADC; Support the HDMI input if desired, also need to increase the HDMI decoder.So many difference in functionality needs different chips and is built into a system, collaborative finishing the work.Simultaneously also bring the complexity of system to increase greatly, numerous chips are also densely arranged on printed circuit board (PCB), the power supply that links to each other with chip, image audio signal, I/O mouth and bus control signal etc. intert mutually, bring the reduction of system reliability and stability, disturb to increase.

Along with the develop rapidly of the technology of semiconductor chips, the integrated level of chip is also more and more higher, makes a single-chip can finish multiple function.Because power supply, radio frequency receive, the mode of operation of audio power amplifier, comprise that operating frequency and operating voltage etc. differ bigger, general inconvenience is integrated; And numeral that other each functional module is carried out or the processing of simulation small-signal have closely similar place, can be integrated into fully in the chips, realize the television reception scheme of super single-chip.Like this, when design Core of TV set circuit board, the developer is to power supply, radio frequency receive, audio power amplifier carries out modification and type selecting,, and can realize the compatible of different electrical power, different television system, different audio amplifiers and derives from without any influence system schema.

Summary of the invention

The utility model is in order to solve TV movement board structure of circuit complexity in the prior art, the problem that causes reliability and stability to reduce, a kind of novel TV receiver movement circuit is provided, utilize the single process chip of high integration to cooperate simple peripheral circuit, realized the encoding and decoding processing of television receiver to sound, vision signal, simplify hardware circuit greatly, improved the stability and the reliability of system's operation.

For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:

A kind of movement circuit of television receiver comprises tuner, AV terminal, VGA terminal, the YPBPR terminal of received RF TV signal, and a single process chip of high integration that integrates sound, video signal processing module; The video signal input terminal of described process chip connects the VT of tuner, the VT of VGA terminal and the high definition color difference signal output of YPBPR terminal respectively; Audio signal input end connects the audio signal output end of tuner, the audio signal output end of VGA terminal and the audio signal output of YPBPR terminal respectively; The VT of described process chip connects the display screen circuit, and audio signal output end connects power amplifier, and then drives loud speaker output through described power amplifier.

In order to realize the broadcast output of television receiver to the HDMI signal, in described television receiver movement circuit, include the HDMI signal terminal, the HDMI signal input part that connects described process chip, solve data image signal and audio signal by the inner integrated HDMI receiving demodulation module of described process chip, and then after its inner described sound, video signal processing module are handled, by its sound, the output of VT mouth.

In addition, in described television receiver movement circuit, also include the remote signal receiving circuit that links to each other with described process chip, the FLASH chip of storing software program and the DDRSDRAM storage chip of storing image data.

In the utility model, it is the high integration audio-video signal process chip realization of MST9U88L that described process chip adopts a model.In the video signal processing module of described process chip, include Video Decoder, 3D comb filter, analog to digital converter, remove the interlacing processing unit, SCALER processing unit and LVDS coding output unit; In its audio-frequency signal processing module, then include volume control unit and audio processing unit.

Compared with prior art, advantage of the present utility model and good effect are: the utility model is by adopting the high single process chip of integrated level in the machine core board circuit design of television receiver, with traditional video decode circuit, the sound accompaniment treatment circuit, circuit modules such as SCALER treatment circuit and HDMI receiving demodulation are integrated in a slice process chip, thereby only need input in single process chip, output and control signal port dispose simple peripheral circuit, can realize the processing broadcast of television set to the audio-video signal of input, simplified the circuit structure of Core of TV set plate greatly, reduce the complete machine cost, effectively improved the stability and the reliability of system's operation.

Description of drawings

Fig. 1 is the schematic block circuit diagram that adopts the Core of TV set circuit board of the single process chip realization of high integration in the utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

The utility model is in order to simplify the circuit structure of Core of TV set plate, the model that adopts MSTAR company is that the single process chip of the high integration of MST9U88L realizes that vision signal and audio signal that television set is received handle, and its circuit structure is referring to shown in Figure 1.

Among Fig. 1, be integrated with audio processing modules, video processing module, MCU and HDMI receiving demodulation module HDMI RX in described process chip MST9U88L inside.Wherein, in described video signal processing module, include Video Decoder Video Decoder, 3D comb filter 3D COMBFILTER, 10bit analog to digital converter ADC, remove interlacing processing unit 3D DE-interlace, SCALER processing unit and LVDS coding output unit LVDS TX; In its audio-frequency signal processing module AudioProcessor, then include volume control unit and audio processing unit.

In whole television receiver, be provided with the remote keying circuit that receives remote controller infrared signal and keypad sweep signal, the electronic tuning unit that receives TV station's radiofrequency signal, the FLASH chip of storing software program, DDR SDRAM chip, power supply, display screen and the loud speaker of storing image data, and other functional module concentrates on all among single process chip MST9U88L and is achieved.

Television receiver of the present utility model is received RF TV signal, AV audio-video signal, YPBPR high definition color difference signal, VGA signal, S-VIDEO signal, HDMI signal simultaneously.Wherein, AV vision signal AV1, AV2 are introduced into the Video Decoder VideoDecoder among the process chip MST9U88L, pass through the 3D comb filter again and go the interlacing processing unit to enter SCALER size normalized unit, and then give display screen by the picture signal of LVDS coding output unit LVDS TX output LVDS coded format, described display screen is liquid crystal display screen or PDP display.AV audio signal AV1_L/R, AV2_L/R enter audio-frequency signal processing module Audio Processor to carry out outputing to power amplifier after volume control and the audio processing, and then carries out power amplification by power amplifier and handle rear drive loud speaker output sound accompaniment.

At first by electronic tuning unit, promptly tuner demodulates CVBS composite video signal and SIF second accompanying sound intermediate frequency signal to radiofrequency signal.CVBS composite video signal and AV vision signal enter display screen after handling through same approach; SIF second accompanying sound intermediate frequency signal is through after the full system type pictorial sound demodulation, demodulates the left and right sound channels audio signal and enter power amplifier after handling with the same approach of AV audio signal, and then drive loud speaker output.

High definition color difference signal YPBPR in vision signal VGA in the VGA terminal or the YPBPR terminal at first enters 10bit analog to digital converter ADC carry out analog-to-digital conversion after, generate digital signal, enter the SCALER unit then and carry out the size normalized, and then through LVDS TX cell encoding, the picture signal of output LVDS coded format is given display screen; Audio signal VGA/HD_L/R is with AV audio signal flow process.

S-VIDEO Signal Processing process is with the AV vision signal.

In order to realize the broadcast output of television receiver to the HDMI signal, in described television receiver movement circuit, include the HDMI signal terminal, connect the HDMI signal input part of described process chip MST9U88L.The HDMI signal at first enters HDMI receiving demodulation module HDMI RX, and the data image signal that demodulates enters the SCALER unit and carries out the size normalized, and then through LVDS TX cell encoding, the picture signal of output LVDS coded format is given display screen; The audio signal that demodulates enters sound accompaniment processing module Audio Processor and carries out driving loud speaker by power amplifier and exporting sound accompaniment after volume control and audio handle.

In the whole TV receiving system, the remote keying control signal is as the interface of user's operation; Electronic tuning unit receives wired or wireless TV signal; The FLASH chip is stored the software program of the operating system of complete machine microcontroller MCU, automatic load operating when complete machine powering; DDR SDRAM chip-stored is used for the data message that image quality is handled; Power supply comprises rational source current of single process chip MST9U88L range of distribution and stable power voltage above each several part unit, guarantees the whole system operate as normal.And display screen and power amplifier, audio amplifier will include the electronic signal of picture-and-sound information respectively and be converted into light signal and voice signal, represent to the audio frequency and video of user's excellence and experience.

Whole system scheme processing technology is simple, and working stability is reliable, has significantly reduced interference, and cost is lower than non-integrated system.This shows, adopt the high single process chip MST9U88L design Core of TV set circuit board of integrated level not only can significantly simplify circuit structure, reduce cost, and can effectively promote the complete machine quality, provide more excellent cost performance to the consumer.

Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.

Claims

1. the movement circuit of a television receiver comprises it is characterized in that tuner, AV terminal, VGA terminal, the YPBPR terminal of received RF TV signal: also include a single process chip of high integration that integrates sound, video signal processing module; The video signal input terminal of described process chip connects the VT of tuner, the VT of VGA terminal and the high definition color difference signal output of YPBPR terminal respectively; Audio signal input end connects the audio signal output end of tuner, the audio signal output end of VGA terminal and the audio signal output of YPBPR terminal respectively; The VT of described process chip connects the display screen circuit, and audio signal output end connects power amplifier, and then drives loud speaker output through described power amplifier.

2. the movement circuit of television receiver according to claim 1, it is characterized in that: in described television receiver movement circuit, include the HDMI signal terminal, the HDMI signal input part that connects described process chip, solve data image signal and audio signal by the inner integrated HDMI receiving demodulation module of described process chip, and then after its inner described sound, video signal processing module are handled, by its sound, the output of VT mouth.

3. the movement circuit of television receiver according to claim 1 is characterized in that: include the remote signal receiving circuit that links to each other with described process chip, the FLASH chip of storing software program and the DDR SDRAM storage chip of storing image data in described television receiver movement circuit.

4. the movement circuit of television receiver according to claim 1 and 2 is characterized in that: include Video Decoder, 3D comb filter, analog to digital converter in the video signal processing module of described process chip, remove the interlacing processing unit, SCALER processing unit and LVDS coding output unit.

5. the movement circuit of television receiver according to claim 1 and 2 is characterized in that: include volume control unit and audio processing unit in the audio-frequency signal processing module of described process chip.

6. the movement circuit of television receiver according to claim 1, it is characterized in that: described process chip is that a model is the high integration audio-video signal process chip of MST9U88L.