CN208548964U

CN208548964U - A kind of multi-standard video converter

Info

Publication number: CN208548964U
Application number: CN201821304269.9U
Authority: CN
Inventors: 夏飙
Original assignee: Shenzhen Yuanxingwei Technology Co Ltd
Current assignee: Shenzhen Yuanxingwei Technology Co Ltd
Priority date: 2018-08-14
Filing date: 2018-08-14
Publication date: 2019-02-26
Anticipated expiration: 2028-08-14

Abstract

The utility model discloses a kind of multi-standard video converter, including box body, on-chip system chip, HDMI switcher chip and HDMI transmitting chip and single-chip microcontroller are equipped in the box body；The single-chip microcontroller is electrical connected by I2C and HDMI switcher chip, and the single-chip microcontroller is electrical connected by GPIO and on-chip system chip, and the on-chip system chip is electrical connected by TTL, I2C and HDMI transmitting chip；A large amount of peripheral circuit is built in on-chip system chip by the ISP chip that original scheme is substituted by using on-chip system chip with highly integrated module；By a HDMI switcher chip, the extension input of the HDMI signal of multichannel is realized；Strong task is required by single-chip microcontroller processing real-time, while realizing the separation of functional module, is reduced the coupling between functional module and control logic, is increased the independence of functional module and the performance of multiplexing；Structure is simple, low in cost.The utility model is applied to audio & video equipment.

Description

A kind of multi-standard video converter

Technical field

The utility model relates to audio & video equipment more particularly to a kind of multi-standard video converters.

Background technique

HDMI interface equipment uses more and more at present, while there is also a large amount of audio-video interfaces to set in actual life It is standby.So also more and more in order to solve the audio-video converter of the audio-video interface compatibility issue of distinct device.Turn at present Parallel operation is broadly divided into two major classes: the first kind, and single-turn converter, mainly single face are converted into another interface, such as AV signal Turn HDMI, VGA turns HDMI.Second class, parallel operation of more walking around, mainly multiple interfaces are converted into other interface, for example AV+VGA turns HDMI etc..1. are had the disadvantages that because requiring an ADC per video all the way, causes peripheral circuit more complicated, it is complicated Peripheral circuit can improve design difficulty and production difficulty；2. because the problem of TTL bus load ability, cause in TTL bus not The too many chip of energy carry, to limit the type and quantity of input channel；3. because IPS does not have the processing capacity of audio, Processing in relation to audio-frequency unit needs additionally to increase ADC and circuit；4. overall complexity is high, higher cost.

The file of Publication No. " 202503598 U of CN " discloses a kind of " a kind of video change-over device ", comprising: AV connects Mouth, Video Graphics Array USB interface, blue tooth interface, HDMI, HDMI selector, AV converter, VGA converter and bluetooth turn Parallel operation etc., through the above technical solutions, the video-audio signal stored in the storage card that memory card interface is connected is by conversion Device is converted to HDMI signal, and is sent to HDMI selector.HDMI signal is sent to video display apparatus by HDMI selector, real Show the video-audio signal that will be stored in storage card to show on video display apparatus.The device has one to existing defect It is fixed to improve, but still show that equipment compatibility is asked without solving various video interface and various video format signal and HDMI Topic.

Utility model content

The utility model aims to solve the problem that above-mentioned technical problem.For this purpose, the utility model proposes a kind of multi-standard Video Quality Metrics Device, structure is simple, low in cost.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of multi-standard video converter, including box body, the box body is interior to be equipped with on-chip system chip, HDMI switcher core Piece and HDMI transmitting chip and single-chip microcontroller；

The single-chip microcontroller is electrical connected by I2C and HDMI switcher chip, and the single-chip microcontroller passes through GPIO and on piece system System chip is electrical connected, and the on-chip system chip is electrical connected by TTL and HDMI transmitting chip

On-chip system chip, for receiving and handling audio-video signal；

HDMI switcher chip realizes the channel HDMI for three road HDMI signal behaviors to be input to on-chip system chip Extension；

HDMI transmitting chip, for being sent out through the processed signal of on-chip system chip.

It is further improved, DDC switching circuit is equipped with outside the on-chip system chip.

It is further improved, EDID module is equipped with outside the on-chip system chip.

Further improved, the single-chip microcontroller is equipped with LED light.

Further improved, the on-chip system chip is electrically embedded in audio & video equipment.

Further improved, the single-chip microcontroller is equipped with control of the infrared remote control receiver to send out for receiving remote controler System order.

Further improved, the control button on the single-chip microcontroller and audio & video equipment is electrical connected.

The beneficial effects of the utility model are: the ISP chip of original scheme is substituted by using on-chip system chip, it will A large amount of peripheral circuit is built in on-chip system chip with highly integrated module；It is real by a HDMI switcher chip The extension input of the HDMI signal of existing multichannel；Strong task is required by single-chip microcontroller processing real-time, while realizing functional module Separation, reduce the coupling between functional module and control logic, increase the independence of functional module and the performance of multiplexing；Structure letter It is single, it is low in cost.

Detailed description of the invention

The present invention will be further described with embodiment with reference to the accompanying drawing.

Fig. 1 is utility model works principle flow chart.

Fig. 2 is single-chip microcontroller working principle flow chart.

Specific embodiment

The utility model is described in detail with reference to the accompanying drawings and examples.

In the present embodiment, it is as follows to write a Chinese character in simplified form meaning for each English: ADC: analog-digital converter；AV:Audio+Video (compound view Frequency signal)；SV:S-Video signal；TTL: level；ISP: image processor；VGA:Video Graphics Array (video Pattern matrix) a kind of video interface；HDMI:High Definition Multimedia Interface high-definition multimedia Interface；GPIO:general purpose Input Output: universal input/output interface.

A kind of multi-standard video converter, including box body, be equipped in box body on-chip system chip, HDMI switcher chip and HDMI transmitting chip and single-chip microcontroller；Single-chip microcontroller is electrical connected by I2C and HDMI switcher chip, and single-chip microcontroller passes through GPIO and piece Upper System on Chip/SoC is electrical connected, and on-chip system chip is electrical connected by TTL, I2C and HDMI transmitting chip；System on chip core Piece, for receiving and handling audio-video signal；HDMI switcher chip, for three road HDMI signal behaviors to be input on piece system System chip, realizes the extension in the channel HDMI；HDMI transmitting chip, for being sent out through the processed signal of on-chip system chip Come.Specifically, box body is platypelloid type structure, it is preferable that the edge of the box body of platypelloid type structure is curved-surface structure, and curved-surface structure is more For beauty.Box body is equipped with the receiving for accommodating on-chip system chip, HDMI switcher chip and HDMI transmitting chip and single-chip microcontroller Chamber.

The ISP chip of original scheme is substituted by using on-chip system chip, by a large amount of peripheral circuit, use is highly integrated Module be built in on-chip system chip；By a HDMI switcher chip, the extension of the HDMI signal of multichannel is realized Input；Strong task is required by single-chip microcontroller processing real-time, while realizing the separation of functional module, reduces functional module and control Coupling between logic processed increases the independence of functional module and the performance of multiplexing；Structure is simple, low in cost.

On-chip system chip, english abbreviation SOC are a kind of System on Chip/SoC of ic-type；HDMI switcher chip, The full name in English of HDMI is " High Definition Multimedia Interface ", Chinese to mean that fine definition is more Media interface can transmit the audio signal and high definition video signal of no compression.

In the technology of above-mentioned technical proposal, DDC switching circuit is equipped with outside on-chip system chip, DDC is to show data Channel；EDID module is equipped with outside on-chip system chip.EDID:Extended Display Identification Data (expands Open up display identification data) it is a kind of VESA standard data format, wherein including the parameter in relation to monitor and its performance, including supply Quotient's information, maximum image size, color setting, manufacturer is answered to pre-set, the limitation of frequency range and display name and sequence number Character string.Audio & video equipment is equipped with remote controler and controls the control button of audio & video equipment, and single-chip microcontroller and audio-video are set Standby upper control button is electrical connected, and single-chip microcontroller is equipped with control of the infrared remote control receiver to send out for receiving remote controler Order.

Single-chip microcontroller is equipped with LED light, and LED light is for showing audio & video equipment working condition.On-chip system chip It is electrically embedded in audio & video equipment so that space can be saved, is equipped with opening specifically, in accommodating chamber system on chip can be made Chip and audio & video equipment are electrical connected.

As shown in Figure 1, the working principle of on-chip system chip: by monitoring the GPIO being connected with single-chip microcontroller, selection needs Audio-video channel is handled, and HDMI transmitting chip is controlled by I2C and sends out the signal handled well, audio & video equipment It plays.

As shown in Fig. 2, the working principle of single-chip microcontroller: after system energization, hardware and software section Xiang Jichu Beginningization, single-chip microcontroller enters major cycle processing after completing initialization, when module " 30ms mark is true " executes, in audio & video equipment Control button when pressing or sending out control command by remote controler, that is, perform " being true by key pressing " module, monolithic Machine notifies on-chip system chip to switch to corresponding operating mode by GPIO, selects corresponding input channel, i.e. execution " key Switch input source operation " module.In general, audio & video equipment there are many input channels, in order to avoid maloperation, need pair Signal makes examination and judgement；Equipment needs user that the desired input channel of client is arranged by control button or remote controler, Consequently only that can just complete " operation of remote control switching input source " module after executing " receiving correct remote control command " module, it is finally completed The selection of input channel.

It can be seen that the present embodiment has the advantages that by above-mentioned analysis

1. using built-in ADC, peripheral circuit is simple, designs and produces simpler.

2. the problem of not being multiplexed TTL bus, bus load ability be not present.

3. the built-in audio processing mould group of on-chip system chip, is further simplified peripheral circuit.

4. additionally increasing single-chip microcontroller, carrys out processing real-time and require stronger task, to improve the response speed of system.

Above embodiments are only to illustrate the technical solution of the utility model and are not intended to limit it, all without departing from this Any modification of utility model spirit and scope or equivalent replacement should all cover the range in technical solutions of the utility model It is interior.

Claims

1. a kind of multi-standard video converter, including box body, it is characterised in that: be equipped in the box body on-chip system chip, HDMI switcher chip and HDMI transmitting chip and single-chip microcontroller；

The single-chip microcontroller is electrical connected by I2C and HDMI switcher chip, and the single-chip microcontroller passes through GPIO and system on chip core Piece is electrical connected, and the on-chip system chip is electrical connected by TTL, I2C and HDMI transmitting chip；

On-chip system chip, for receiving and handling audio-video signal；

HDMI switcher chip realizes the expansion in the channel HDMI for three road HDMI signal behaviors to be input to on-chip system chip Exhibition；

2. multi-standard video converter according to claim 1, it is characterised in that: be equipped with outside the on-chip system chip DDC switching circuit.

3. multi-standard video converter according to claim 1, it is characterised in that: be equipped with outside the on-chip system chip EDID module.

4. multi-standard video converter according to claim 1, it is characterised in that: the single-chip microcontroller is equipped with LED light.

5. multi-standard video converter according to claim 1, it is characterised in that: the on-chip system chip is electrically embedded in In audio & video equipment.

6. multi-standard video converter according to claim 5, it is characterised in that: the single-chip microcontroller connects equipped with infrared remote control Receive control command of the device to send out for receiving remote controler.

7. multi-standard video converter according to claim 5, it is characterised in that: on the single-chip microcontroller and audio & video equipment Control button be electrical connected.