CN202077127U - Video signal format conversion circuit - Google Patents

Video signal format conversion circuit Download PDF

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Publication number
CN202077127U
CN202077127U CN2011201390641U CN201120139064U CN202077127U CN 202077127 U CN202077127 U CN 202077127U CN 2011201390641 U CN2011201390641 U CN 2011201390641U CN 201120139064 U CN201120139064 U CN 201120139064U CN 202077127 U CN202077127 U CN 202077127U
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China
Prior art keywords
interface
hdmi
video
chip
video signal
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Expired - Lifetime
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CN2011201390641U
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Chinese (zh)
Inventor
伍海龙
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Beijing Triolion Science & Technology Co Ltd
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Beijing Triolion Science & Technology Co Ltd
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Priority to CN2011201390641U priority Critical patent/CN202077127U/en
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Abstract

The utility model relates to a video signal interface circuit and discloses a video signal format conversion circuit. The video signal format conversion circuit comprises a plurality of video input interfaces, a digital video processing chip, a high-definition multimedia interface (HDMI) transmission chip, an HDMI input interface, a double data rate (DDR) internal memory and a Flash memory, wherein the digital video processing chip is used for receiving a plurality of video input signal formats at the same time and converting the video signal formats into one path of HDMI video signals to output; the digital video processing chip is connected with the plurality of video input interfaces, the HDMI transmission chip, the DDR internal memory and the Flash memory respectively; and the HDMI transmission chip is connected with the HDMI output interface. The video signal format conversion circuit of the utility model has simple design, small volume and low cost, can realize high-definition output resolution ratio of 1080P, and can receive a plurality of video signals to convert into one way of HDMI video signals to output.

Description

A kind of video signal format change-over circuit
Technical field
The utility model relates to a kind of video signal interface circuit, relates in particular to a kind of video signal format change-over circuit.
Background technology
At present, common video signal format has composite video, VGA, DVI, HDMI, DisplayPort etc. multiple.Common on the market display generally can only receive one or both signal formats.When the user has the various video signal source, just must have many displays, with corresponding corresponding video form interface; Or have a display device, be equipped with a video signal format conversion equipment again, but this conversion equipment generally all huger, cost an arm and a leg, perhaps the video output resolution ratio is lower.
The utility model content
The utility model provides a kind of video signal format change-over circuit, its simplicity of design at the problems referred to above, volume is less, and cost is low, can realize the high definition output resolution ratio of 1080P, can receive the plurality of video signal, be converted into the output of one road HDMI vision signal then.
In order to achieve the above object, the utility model has following technical scheme:
A kind of video signal format change-over circuit of the present utility model, comprise that plurality of video input interface, Digital Video Processing chip, HDMI send chip, HDMI output interface, DDR internal memory, Flash memory, wherein, described Digital Video Processing chip is used for receiving simultaneously some kinds of video input signals forms, be converted into the output of one road HDMI vision signal, described Digital Video Processing chip is connected with plurality of video input interface, HDMI transmission chip, DDR internal memory, Flash memory respectively, and HDMI sends chip and is connected with the HDMI output interface.
Wherein, described plurality of video input interface comprises composite video interface one, composite video interface two, VGA interface, DVI interface, HDMI interface, DisplayPort interface.
It is the chip of STDP8028 that Digital Video Processing chip of the present utility model adopts model, based on the X186 processor architecture, can accept the multiple format video signal of multichannel source, the SD and the high-definition signal that comprise the input of CVBS, S-Video and component input terminal, can realize PBP, PIP function, also integrated in addition audio signal.It can be converted to video input signals 24 TTL data-signal outputs.CVBS: composite video baseband signal.S-Video: can transmit brightness and colourity content respectively.Monochrome information and color difference signal are separated, can significantly be improved picture quality.
It is the chip of SiI9134 that HDMI sends chip employing model, this chip bandwidth height, and output resolution ratio can reach 1080P, can be the output of HDMI signal with 24 TTL conversion of signals.
Circuit working process of the present utility model is: the vision signal of different-format is linked in the STDP8028 chip by video input interface, is converted to 24bit TTL signal, is input to SiI9135, is converted to the HDMI signal then and outputs to video output interface.Can realize PIP, PBP function by programming.
Advantage of the present utility model is:
Video signal format change-over circuit simplicity of design of the present utility model, volume is less, cost is low, can realize the high definition output resolution ratio of 1080P, can receive two-path video signal, one road VGA, one road DVI, one road HDMI, one road DisplayPort signal, be converted into the output of one road HDMI vision signal then, can realize PIP, PBP function, therefore be well suited for being used for public large display screen or high-quality family audio ﹠ video equipment.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model.
Among the figure: 1. Digital Video Processing chip, 2.HDMI sends chip, and 3. composite video interface one, and 4. composite video interface two, 5.VGA interface, 6.DVI interface, 7.HDMI interface, 8.DisplayPort interface, 9.DDR internal memory, 10.Flash memory, 11.HDMI output interface.
Embodiment
Following examples are used to illustrate the utility model, but are not used for limiting scope of the present utility model.
Referring to Fig. 1, the Digital Video Processing chip 1 of a kind of video signal format change-over circuit of the present utility model, HDMI send chip 2, composite video interface 1, composite video interface 24, VGA interface 5, DVI interface 6, HDMI interface 7, DisplayPort interface 8, DDR internal memory 9, Flash memory 10, HDMI output interface 11 compositions, wherein, composite video interface 1, composite video interface 24 are received the analog input front end that model is the STDP8028 chip; The R of VGA interface 5, G, B, H, V data wire are received the corresponding VGA pin that model is the STDP8028 chip; The TMDS signal of DVI interface 6 is received the HDMI_A interface that model is the STDP8028 chip; The TMDS signal of HDMI interface 7 is received the HDMI_B pin that model is the STDP8028 chip, and the HDCP signal of HDMI interface 7 is received SDA pin and the SCL pin that model is the STDP8028 chip; DisplayPort interface 8 is received the DP pin that model is the STDP8028 chip; Model is the video data signal line R[7:0 of STDP8028 chip]/G[7:0]/B[7:0] receive the input pin that model is the SiI9134 chip, model is that the video data enable signal DE and the row field sync signal HSYNC/VSYNC of STDP8028 chip receives DE input pin and the HSYNC/VSYNC input pin that model is the SiI9134 chip respectively; Model is that the TMDS signal of SiI9134 chip is received on the HDMI video output interface.
VGA (Video Graphics Array), promptly Video Graphics Array is a kind of video transmission standard that IBM released with the PS/2 machine in 1987.
The DVI full name is Digital Visual Interface, be that the numeral of being made up of jointly Silicon Image, Intel (Intel), Compaq (Compaq), IBM, HP (Hewlett-Packard), NEC, Fujitsu companies such as (Fujitsu) in 1999 shows the interface standard that the DDWG of working group (Digital Display Working Group) releases, its outward appearance is the connector of one 24 pin.
The English full name of HDMI is " High Definition Multimedia ", and the meaning of Chinese is a HDMI (High Definition Multimedia Interface).The HDMI interface can provide the data transfer bandwidth up to 5Gbps, can transmit the audio signal and the high definition video signal that do not have compression.Need not simultaneously to transmit advance capable D/A or mould/number conversion, can guarantee that the video-audio signal of first water transmits at signal.
TMDS, i.e. transition minimized differential signaling is as the standard of electric level.Be applied to sending the data of digital visual interface (DV1) and HDMI (High Definition Multimedia Interface) (HDM1).
HDCP (High-bandwidth Digital Content Protection): HDCP technology.
DisplayPort:2006 May, VESA (video electronics standard tissue) has formally issued DisplayPort 1.0 standards, and this is a kind of at all display devices open standard of (comprising inside and outside interface).
PIP, PBP function, i.e. dual menu display function.
Above execution mode just is explanation the utility model example, and is not the qualification at execution mode of the present utility model.In actual the enforcement, output interface can be output as DVI form or VGA form by changing video transmission chip SiI9134; And input interface also can receive more composite video input, and is not only two composite video interface.Therefore, the variation of every input interface quantity of being drawn of drawing based on technical solutions of the utility model or the variation of output interface type still are in the row of protection range of the present utility model.

Claims (2)

1. video signal format change-over circuit, it is characterized in that: comprise that plurality of video input interface, Digital Video Processing chip, HDMI send chip, HDMI output interface, DDR internal memory, Flash memory, wherein, described Digital Video Processing chip is used for receiving simultaneously some kinds of video input signals forms, be converted into the output of one road HDMI vision signal, described Digital Video Processing chip is connected with plurality of video input interface, HDMI transmission chip, DDR internal memory, Flash memory respectively, and HDMI sends chip and is connected with the HDMI output interface.
2. a kind of video signal format change-over circuit according to claim 1 is characterized in that: described plurality of video input interface comprises composite video interface one, composite video interface two, VGA interface, DVI interface, HDMI interface, DisplayPort interface.
CN2011201390641U 2011-05-05 2011-05-05 Video signal format conversion circuit Expired - Lifetime CN202077127U (en)

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CN2011201390641U CN202077127U (en) 2011-05-05 2011-05-05 Video signal format conversion circuit

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102982782A (en) * 2012-11-12 2013-03-20 深圳市创凯电子有限公司 Multi-format signal conversion device and display equipment
CN103220486A (en) * 2012-01-20 2013-07-24 北京凯新创达科技发展有限公司 Universal converter changing standard definition to high definition
CN103237190A (en) * 2013-03-28 2013-08-07 浙江一舟电子科技股份有限公司 VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter
CN103281502A (en) * 2013-06-14 2013-09-04 南京欧帝科技有限公司 Quadruple-high-definition liquid crystal color screen input interface
CN105609497A (en) * 2015-12-29 2016-05-25 合肥宏晶微电子科技股份有限公司 System-level packaging technology for VGA/YPbPr-to-HDMI interface module
CN105681685A (en) * 2014-11-17 2016-06-15 孤山电子科技(上海)有限公司 Signal processor and system and implementation method of picture in picture and multi-screen display

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103220486A (en) * 2012-01-20 2013-07-24 北京凯新创达科技发展有限公司 Universal converter changing standard definition to high definition
CN102982782A (en) * 2012-11-12 2013-03-20 深圳市创凯电子有限公司 Multi-format signal conversion device and display equipment
CN103237190A (en) * 2013-03-28 2013-08-07 浙江一舟电子科技股份有限公司 VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter
CN103281502A (en) * 2013-06-14 2013-09-04 南京欧帝科技有限公司 Quadruple-high-definition liquid crystal color screen input interface
CN105681685A (en) * 2014-11-17 2016-06-15 孤山电子科技(上海)有限公司 Signal processor and system and implementation method of picture in picture and multi-screen display
CN105609497A (en) * 2015-12-29 2016-05-25 合肥宏晶微电子科技股份有限公司 System-level packaging technology for VGA/YPbPr-to-HDMI interface module

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C56 Change in the name or address of the patentee
CP02 Change in the address of a patent holder

Address after: 100094, Room 301, building 8, Zhongguancun Software Park, 8 northeast Wang Xi Road, Beijing, Haidian District

Patentee after: Beijing Triolion Science & Technology Co., Ltd.

Address before: 100085 Jiahua building, 3rd Street, Beijing, Haidian District, C1009

Patentee before: Beijing Triolion Science & Technology Co., Ltd.

C56 Change in the name or address of the patentee
CP02 Change in the address of a patent holder

Address after: 100193, Room 301, building 8, Zhongguancun Software Park, 8 northeast Wang Xi Road, Beijing, Haidian District

Patentee after: Beijing Triolion Science & Technology Co., Ltd.

Address before: 100094, Room 301, building 8, Zhongguancun Software Park, 8 northeast Wang Xi Road, Beijing, Haidian District

Patentee before: Beijing Triolion Science & Technology Co., Ltd.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20111214