CN214627134U - Acquisition and coding device for high-definition HDMI audio/video signals - Google Patents

Acquisition and coding device for high-definition HDMI audio/video signals Download PDF

Info

Publication number
CN214627134U
CN214627134U CN202120824255.5U CN202120824255U CN214627134U CN 214627134 U CN214627134 U CN 214627134U CN 202120824255 U CN202120824255 U CN 202120824255U CN 214627134 U CN214627134 U CN 214627134U
Authority
CN
China
Prior art keywords
circuit
module
audio
hdmi
power supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202120824255.5U
Other languages
Chinese (zh)
Inventor
江勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Link Card Co ltd
Original Assignee
Link Card Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Link Card Co ltd filed Critical Link Card Co ltd
Priority to CN202120824255.5U priority Critical patent/CN214627134U/en
Application granted granted Critical
Publication of CN214627134U publication Critical patent/CN214627134U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The utility model provides a high definition HDMI audio video signal's collection and coding device, include: the HDMI signal input module, digital audio change simulation audio module, host system and USB power module respectively with power supply module is connected, HDMI signal input module respectively with digital audio changes simulation audio module and host system are connected, digital audio change simulation audio module and USB power module respectively with host system is connected. The utility model can effectively reduce the system cost and the host burden, realize MJPEG and H.264 hardware coding of HDMI video, and transmit the video through the USB2.0 interface, thereby improving the compatibility; on the basis, the power supply module and the USB power supply module are integrated, an external power supply module is not needed, and the size of the equipment is effectively reduced.

Description

Acquisition and coding device for high-definition HDMI audio/video signals
Technical Field
The utility model relates to a signal acquisition device especially relates to a high definition HDMI audio and video signal's collection and coding device.
Background
A High Definition Multimedia Interface (HDMI) is a fully digital video and audio transmission Interface, and can transmit uncompressed audio and video signals. The HDMI can be used for set-top boxes, DVD players, personal computers, TV players, comprehensive amplifiers, digital audio devices, TV sets and other devices. HDMI can send audio frequency and video signal simultaneously, because audio frequency and video signal adopt same wire rod, simplify the installation degree of difficulty of system's circuit greatly, consequently, HDMI's application is fairly extensive.
On the other hand, most of the existing mobile devices have the USB function, and if a device for acquiring HDMI audio/video signals through a USB interface is designed, the application scenarios can be greatly expanded, and the docking requirements between the mobile devices and the HDMI can be further met. The solutions for such products at present fall into 2 general categories: the scheme has the advantages that the defects are obvious, the compatibility of HMDI signals is poor, the actual maximum transmission rate limited to USB2.0 is about 37MB/s, and the image quality of an acquisition end is also poor. Secondly, a professional solution is adopted, a USB3.0 interface is adopted to support a YUV format non-coding acquisition 1080P60 image, the image quality is good, but the price cost is very high, the equipment volume is large, and the heat emission is high. Both of these solutions have their own problems, and require an external power supply module, which is bulky and not well compatible and expandable.
Disclosure of Invention
The utility model aims to solve the technical problem that need not provide an outside power module not, small and compatible strong, realize high definition HDMI audio/video signal's collection and hardware coding's device through the USB interface.
To this, the utility model provides a high definition HDMI audio video signal's collection and coding device, include: the HDMI signal input module, digital audio change simulation audio module, host system and USB power module respectively with power supply module is connected, HDMI signal input module respectively with digital audio changes simulation audio module and host system are connected, digital audio change simulation audio module and USB power module respectively with host system is connected.
The utility model discloses a further improvement lies in, digital audio changes simulation audio module includes that audio frequency changes simulation double track circuit and controls the channel and change single track circuit, HDMI signal input module passes through audio frequency changes simulation double track circuit connection to control the channel and change single track circuit, control the channel and change single track circuit connection to host system.
The utility model discloses a further improvement lies in, HDMI signal input module includes HDMI seat, HDMI signal acquisition circuit and first ESD protection circuit, HDMI seat and first ESD protection circuit respectively with HDMI signal acquisition circuit is connected.
The utility model discloses a further improvement lies in, HDMI signal input module still includes the signal detection circuit, the signal detection circuit with HDMI signal acquisition circuit is connected.
The utility model discloses a further improvement lies in, HDMI signal input module still includes reset control circuit, HDMI signal acquisition circuit passes through reset control circuit is connected to host system.
The utility model discloses a further improvement lies in, power supply module includes first DC-DC step-down circuit, second DC-DC step-down circuit and third DC-DC step-down circuit, first DC-DC step-down circuit, second DC-DC step-down circuit and third DC-DC step-down circuit export first voltage, second voltage and third voltage respectively.
The utility model discloses a further improvement lies in, USB power module includes the USB seat, supplies power state indicating circuit and second ESD protection circuit, the USB seat respectively with supply power state indicating circuit and second ESD protection circuit are connected.
The utility model discloses a further improvement lies in, USB power module still includes common mode inductance, the USB seat is connected to through second ESD protection circuit and common mode inductance the host system.
The utility model discloses a further improvement lies in, still includes power distribution module, power distribution module respectively with power supply module and host system are connected.
The utility model discloses a further improvement lies in, still includes firmware memory circuit, firmware memory circuit with host system is connected.
Compared with the prior art, the beneficial effects of the utility model reside in that: the HDMI signal input module, the digital audio-to-analog audio module, the main control module and the USB power supply module are respectively connected with the power supply module, the HDMI signal input module is respectively connected with the digital audio-to-analog audio module and the main control module, and the digital audio-to-analog audio module and the USB power supply module are respectively connected with the main control module, so that a video signal of the HDMI signal input module can be directly sent to the main control module for coding, and meanwhile, an audio signal of the HDMI signal input module can be sent to an audio analog input port of the main control module through the digital audio-to-analog audio module, so that the system cost and the host burden are reduced, the audio signal is externally transmitted through a USB2.0 interface, and the compatibility of the HDMI signal input module and the main control module is improved; on this basis, the utility model discloses still through power supply module and USB power module's integration, need not outside power module, effectively reduced the equipment volume to follow-up the expansion for the product provides fine hardware basis.
Drawings
Fig. 1 is a block diagram of a circuit module according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a digital-to-analog audio module according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an HDMI signal input module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a power supply module according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a USB power supply module according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a master control module according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a power distribution module according to an embodiment of the present invention;
fig. 8 is a schematic circuit diagram of a firmware storage circuit according to an embodiment of the invention.
Detailed Description
Preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to fig. 6, this example provides a device for acquiring and encoding a high-definition HDMI audio/video signal, including: power supply module 1, host system 2, USB power module 3, HDMI signal input module 4 and digital audio change simulation audio module 5 respectively with power supply module 1 is connected, HDMI signal input module 4 respectively with digital audio changes simulation audio module 5 and host system 2 and is connected, digital audio change simulation audio module 5 and USB power module 3 respectively with host system 2 is connected.
As shown in fig. 2, the digital audio-to-analog audio module 5 of this embodiment includes an audio-to-analog two-channel circuit 501 and a left-to-right-to-mono channel circuit 502, the HDMI signal input module 4 is connected to the left-to-right-to-mono channel circuit 502 through the audio-to-analog two-channel circuit 501, and the left-to-right-to-mono channel circuit 502 is connected to the main control module 2. The audio-to-analog two-channel circuit 501 is also called an IIS audio CODEC circuit, and the audio-to-analog two-channel circuit 501 preferably realizes the IIS audio-to-analog two-channel conversion through a CS4344 audio processing chip, and then realizes the channel conversion through the left and right channel-to-single channel circuit 502, and inputs the converted audio to the audio analog input port LINEIN the main control module 2; the IIS (Inter-IC Sound Bus) is a Bus standard established by philips for audio data transmission between digital audio devices, and in the IIS standard of philips, both a hardware interface specification and a format of digital audio data are specified.
As shown in fig. 3, the HDMI signal input module 4 in this embodiment includes an HDMI socket 401, an HDMI signal acquisition circuit 402, and a first ESD protection circuit 403, where the HDMI socket 401 and the first ESD protection circuit 403 are respectively connected to the HDMI signal acquisition circuit 402. In this embodiment, the HDMI socket 401 is a connection socket for providing an HDMI interface, the HDMI signal acquisition circuit 402 is a signal acquisition and conversion circuit for converting an HDMI signal into a BT1120 signal, for example, the acquisition and conversion of the HDMI signal is realized by an ADV7611 chip, in this embodiment, an HDMI signal input chip of the ADI company is preferably adopted, and ESD protection is further realized by the first ESD protection circuit 403, so as to enhance the stability and reliability of the HDMI signal.
As shown in fig. 3, the HDMI signal input module 4 further preferably includes a signal detection circuit 404 and a reset control circuit 405, where the signal detection circuit 404 is connected to the HDMI signal acquisition circuit 402 for detecting whether there is HMDI signal input, and no signal is a pure blue image output by default through USB; the HDMI signal acquisition circuit 402 of this embodiment is connected to the main control module 2 through the reset control circuit 405, so as to facilitate the main control module 2 to reset the HDMI signal input module 4, and preferably to control the ADV7611 chip.
As shown in fig. 4, the power supply module 1 of this embodiment includes a first DC-DC voltage reduction circuit 101, a second DC-DC voltage reduction circuit 102, and a third DC-DC voltage reduction circuit 103, where the first DC-DC voltage reduction circuit 101, the second DC-DC voltage reduction circuit 102, and the third DC-DC voltage reduction circuit 103 output a first voltage, a second voltage, and a third voltage, respectively. Preferably, the input power supply of the present example is preferably a 5V power supply, such as a USB input power supply; the first voltage is 3.3V, the second voltage is preferably 1.5V, and the third voltage is preferably 1.1V, in this example, the power supply module 1 preferably outputs three different voltage values, so as to facilitate various power supply requirements of each module in the high-definition HDMI audio/video signal acquisition and encoding device, and no external power supply module is needed, and voltage output ends of the first DC-DC voltage reduction circuit 101, the second DC-DC voltage reduction circuit 102, and the third DC-DC voltage reduction circuit 103 are preferably connected with a filter circuit for realizing voltage reduction, filtering, and voltage stabilization output.
As shown in fig. 5, the USB power supply module 3 in this embodiment includes a USB socket 301, a power supply status indication circuit 302, a second ESD protection circuit 303, and a common mode inductor 304, where the USB socket 301 is connected to the power supply status indication circuit 302 and the second ESD protection circuit 303 respectively; the USB socket 301 is connected to the main control module 2 through a second ESD protection circuit 303 and a common mode inductor 304. The USB power supply module 3 is configured to implement USB power supply, the USB socket 301 is a USB interface socket, and after ESD protection is implemented by the second ESD protection circuit 303, the USB socket is connected to the main control module 2 through the common mode inductor 304 to implement power supply and communication with the main control module 2; the power supply state indicating circuit 302 can well realize the power supply and state indication of the USB terminal, and the light emitting diode D6 of the power supply state indicating circuit 302 is preferably disposed beside the USB socket 301.
As shown in fig. 6, the main control chip U1 in the main control module 2 in this example preferably employs a BC905 coding chip, which can simultaneously support 2-way video stream coding of MJPEG and h.264, and a coding unit is integrated inside the main control chip U1, and the coding unit can implement h.264 coding and MJPEG coding on hardware through the BC905 coding chip, and coding parameters can be adjusted by a user. And 2 paths of video streams and 1 path of audio streams are simultaneously output by adopting a USB2.0 interface, so that the compatibility is good. The multi-path streams are output simultaneously, so that the audio and video signals can be processed respectively; the present example supports the universal USB standards UVC and UAC protocols without additional drivers.
As shown in fig. 7, this embodiment further preferably includes a power distribution module 6, where the power distribution module 6 is connected to the power supply module 1 and the main control module 2, respectively. The power distribution module 6 in this embodiment is mainly used to implement power distribution for each different module circuit, and improve the anti-interference capability of the module circuit, for example, the power distribution circuit 601, the audio processing power distribution circuit 602, the USB power distribution module 603, and the memory power distribution module 604 for the main control module. As shown in fig. 8, the present embodiment further includes a firmware storage circuit 7, where the firmware storage circuit 7 is an SPI Flash program firmware storage circuit, and is connected to the main control module 2, so as to facilitate the storage function of the SPI Flash program firmware.
To sum up, in this embodiment, the HDMI signal input module 4, the digital audio-to-analog audio module 5, the main control module 2, and the USB power supply module 3 are respectively connected to the power supply module 1, the HDMI signal input module 4 is respectively connected to the digital audio-to-analog audio module 5 and the main control module 2, and the digital audio-to-analog audio module 5 and the USB power supply module 3 are respectively connected to the main control module 2, so that the video signal of the HDMI signal input module 4 can be directly sent to the main control module 2 for encoding, and simultaneously the audio signal of the HDMI signal input module 4 can be sent to the audio analog input port of the main control module 2 through the digital audio-to-analog audio module 5, so as to reduce the system cost and the host burden, achieve MJPEG and h.264 hardware encoding of HDMI video, and transmit the encoded video to the outside through the USB2.0 interface, the compatibility is improved; on the basis, the power supply module 1 and the USB power supply module 3 are integrated, an external power supply module is not needed, the size of equipment is effectively reduced, and a good hardware basis is provided for subsequent expansion of products.
The above-mentioned embodiments are the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and the scope of the present invention includes and is not limited to the above-mentioned embodiments, and all equivalent changes made according to the shape and structure of the present invention are within the protection scope of the present invention.

Claims (10)

1. The utility model provides a collection and coding device of high definition HDMI audio video signal which characterized in that includes: the HDMI signal input module, digital audio change simulation audio module, host system and USB power module respectively with power supply module is connected, HDMI signal input module respectively with digital audio changes simulation audio module and host system are connected, digital audio change simulation audio module and USB power module respectively with host system is connected.
2. The device for acquiring and encoding high-definition HDMI audio/video signals according to claim 1, wherein the digital audio-to-analog audio module comprises an audio-to-analog two-channel circuit and a left-to-right channel to single-channel circuit, the HDMI signal input module is connected to the left-to-right channel to single-channel circuit through the audio-to-analog two-channel circuit, and the left-to-right channel to single-channel circuit is connected to the main control module.
3. The device for acquiring and encoding high-definition HDMI audio/video signals according to claim 1, wherein the HDMI signal input module comprises an HDMI socket, an HDMI signal acquisition circuit and a first ESD protection circuit, and the HDMI socket and the first ESD protection circuit are respectively connected with the HDMI signal acquisition circuit.
4. The device for acquiring and encoding high-definition HDMI audio/video signals according to claim 3, wherein the HDMI signal input module further comprises a signal detection circuit, and the signal detection circuit is connected with the HDMI signal acquisition circuit.
5. The device for acquiring and encoding high-definition HDMI audio/video signals according to claim 3, wherein the HDMI signal input module further comprises a reset control circuit, and the HDMI signal acquisition circuit is connected to the main control module through the reset control circuit.
6. The device for acquiring and encoding high-definition HDMI audio-video signals according to any one of claims 1 to 5, wherein the power supply module comprises a first DC-DC voltage reduction circuit, a second DC-DC voltage reduction circuit and a third DC-DC voltage reduction circuit, and the first DC-DC voltage reduction circuit, the second DC-DC voltage reduction circuit and the third DC-DC voltage reduction circuit respectively output a first voltage, a second voltage and a third voltage.
7. The device for acquiring and encoding high-definition HDMI audio-video signals according to any one of claims 1 to 5, wherein the USB power supply module comprises a USB socket, a power supply state indicating circuit and a second ESD protection circuit, and the USB socket is respectively connected with the power supply state indicating circuit and the second ESD protection circuit.
8. The device for acquiring and encoding high-definition HDMI audio/video signals according to claim 7, wherein the USB power supply module further comprises a common mode inductor, and the USB socket is connected to the main control module through a second ESD protection circuit and the common mode inductor.
9. The device for acquiring and encoding high-definition HDMI audio/video signals according to any one of claims 1 to 5, further comprising a power distribution module, wherein the power distribution module is respectively connected with the power supply module and the main control module.
10. The device for acquiring and encoding high-definition HDMI audio-video signals according to any one of claims 1 to 5, further comprising a firmware storage circuit, wherein the firmware storage circuit is connected with the main control module.
CN202120824255.5U 2021-04-21 2021-04-21 Acquisition and coding device for high-definition HDMI audio/video signals Active CN214627134U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120824255.5U CN214627134U (en) 2021-04-21 2021-04-21 Acquisition and coding device for high-definition HDMI audio/video signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120824255.5U CN214627134U (en) 2021-04-21 2021-04-21 Acquisition and coding device for high-definition HDMI audio/video signals

Publications (1)

Publication Number Publication Date
CN214627134U true CN214627134U (en) 2021-11-05

Family

ID=78404214

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120824255.5U Active CN214627134U (en) 2021-04-21 2021-04-21 Acquisition and coding device for high-definition HDMI audio/video signals

Country Status (1)

Country Link
CN (1) CN214627134U (en)

Similar Documents

Publication Publication Date Title
CN210129927U (en) Data transmission device
US11500804B2 (en) Method for transmitting control instruction, transmitting device, and receiving device
CN102377970A (en) MHL (Mobile High-Definition Link) data conversion system
CN103702164A (en) UHD (Ultra High Definition) signal transferring device and network STB (Set Top Box)
CN214627134U (en) Acquisition and coding device for high-definition HDMI audio/video signals
CN107911701A (en) A kind of 4K Video codings, storage and Transmission system
CN203537473U (en) Video signal change-over box
CN206313908U (en) A kind of high definition movable video monitoring equipment
CN203457231U (en) Intelligent video signal switching device
CN207802170U (en) A kind of multi-path HDMI interfaces codec terminal system
CN202282825U (en) MHL (Mobile High-Definition Link) data conversion system
CN214627225U (en) Device for realizing SDI signal acquisition and coding through USB
CN214627135U (en) Device for realizing high-definition analog video acquisition and encoding through USB
CN206790617U (en) A kind of 4K high definitions transmitter
CN216313299U (en) Audio and video real-time storage and live broadcast device
CN212086334U (en) Video processing apparatus
US20130162018A1 (en) Adapter
CN109155871B (en) Image output system, image output device and connection cable
US8477245B1 (en) Adapter
CN104754379B (en) A kind of method and device of data transmission
CN201805521U (en) Set top box capable of controlling and processing multi-type television signals
CN215121055U (en) HDMI network cable extender signal long-distance transmission processing system
CN204104030U (en) Support the VGA display module structure of PAL-D video superimpose
CN220067510U (en) Audio-video interface conversion device and audio-video interface conversion equipment
CN213028434U (en) Background music host system with UART and 485 conversion interface module

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant