CN108055492A - A kind of HDMI sounds draw piece-rate system and method - Google Patents
A kind of HDMI sounds draw piece-rate system and method Download PDFInfo
- Publication number
- CN108055492A CN108055492A CN201711385683.7A CN201711385683A CN108055492A CN 108055492 A CN108055492 A CN 108055492A CN 201711385683 A CN201711385683 A CN 201711385683A CN 108055492 A CN108055492 A CN 108055492A
- Authority
- CN
- China
- Prior art keywords
- hdmi
- edid
- sii9777
- port
- video
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005236 sound signal Effects 0.000 claims abstract description 3
- 238000000926 separation method Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000003786 synthesis reaction Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/015—High-definition television systems
Abstract
Piece-rate system is drawn the invention discloses a kind of HDMI sounds and method, the system include main control device and SII9777 chips, and wherein main control device passes through I2C connection SII9777 chips, meanwhile, the main control device controls the reset circuit of SII9777 by GPIO；SII9777 has HDMI input ports all the way, and two-way output port, the two-way output port, exports audio signal, exports vision signal all the way all the way.The present invention is to realize that EDID merges based on SII9777 chips, realize that sound draws separated system and method, and, this scheme is realized based on SII9777 chips, compatibility and stability the meeting higher of HDMI, is synthesized, HDMI Auto-Sensings using EDID, the intelligent of equipment is not only increased, also improves the compatibility of equipment.
Description
Technical field
The technical field more particularly to one kind shown the present invention relates to video realizes that sound draws separated system by HDMI.
Background technology
High-definition multimedia interface (English:High Definition Multimedia Interface, referred to as
HDMI it is) a kind of digitized video/audio interface technology, is the tailored version digital interface for being suitble to image transmission, it can be simultaneously
Transmit audio and video signal.
Use the scheme of distributor mostly on the market at present, i.e. two HDMI export sound and picture, this side simultaneously
The major defect of case is, for some old display devices, the bandwidth of HDMI can be inadequate, and having for high-resolution can be very big
Unstability.
If patent application 201510024388.3 discloses a kind of HDMI audio and video switching device, including at least two HDMI
Input interface, video switcher, HDMI output interface, SPDIF output interfaces, microcontroller and key-press module；Wherein, video is cut
The audio and video input terminal of parallel operation and at least two HDMI input interfaces, for selecting at least two in response to video switching signal
The HDMI signals of one of HDMI interface output；The video output terminals of video switcher are connected with HDMI output interface, for exporting
High-definition video signal is exported to the HDMI output interface；First audio output of video switcher and SPDIF output interfaces
Connection, for exporting the first digital audio and video signals to SPDIF output interfaces；Key-press module includes at least a switching key, micro-control
First control terminal of device processed is connected with video switcher, and the input terminal of microcontroller is connected with key-press module.The device of the invention
It can realize the switching output of multichannel HDMI signals.
However, the structure of the simply multichannel HDMI signals switching involved by the patent application, HDMI is still to be carried out at the same time
The output of Voice and Video.
The content of the invention
For shortcoming present in above-mentioned technology, the present invention provides a kind of HDMI sounds and draws piece-rate system and method, should
System and method sets double HDMI mouthfuls of outputs, and picture is exported from master port, and the equipment that sound is exported from secondary port so can be real
Existing image harmony cent from two different port outputs, is not interfere with each other mutually.
To achieve the above object, the present invention is realized in.
A kind of HDMI sounds draw piece-rate system, it is characterised in that and the system includes main control device and SII9777 chips, wherein
Main control device passes through I2C connection SII9777 chips, meanwhile, the main control device controls the reset electricity of SII9777 by GPIO
Road；SII9777 has HDMI input ports all the way, two-way output port, and the two-way output port exports audio letter all the way
Number, vision signal is exported all the way.
Further, the port of the output vision signal is master port, and the port of exports audio signal is secondary port, main side
Mouth only has video, without audio, so saves HDMI bandwidth, equipment compatibility can be more preferable.
A kind of HDMI sounds draw separation method, it is characterised in that described method includes following steps：
101st, video/audio data are obtained；
102nd, after CPU parses video/audio data, it is output to SII9777；
103rd, SII9777 separates data, obtains Voice and Video data；
104th, SII9777 exports audio ＆ video data by specific port.
The separation is one group of data coming of CPU outputs, is a frame video of char types and the data of audio,
Such as 512 data are video wherein before possibility, rear 512 data are audio.By two buff, by data separating, then incite somebody to action
Two groups of data are sent respectively to two delivery outlets of SII9777.
Further, in the method, it is as follows that EDID building-up processes are carried out：
201st, input signal is detected；
202nd, judge the type of input signal, be master port input or the input of secondary port or two ports have it is defeated
Enter；
203rd, EDID, the EDID are read, the EDID of EDID and secondary port including master port；
204th, EDID synthesis is carried out, if in the case that Primary port and secondary port has input, is then carried out the EDID of the two
Synthesis, generates new EDID；
205th, export EDID and give HDMI equipment, the control of HDMI equipment exports corresponding signal.
In 201 step, HDMI Auto-Sensings, when secondary port is not inserted into, EDID uses master port, video
Master port is output to sound, more intelligently.
Further, when the method main control device receives HDMI insertions, EDID is read.If support there was only main side
Mouth enters, and the EDID of master port is all just given to master control processing, exports corresponding HDMI signals.If secondary port is supported also to have
HDMI equipment is inserted into, and reads the EDID of secondary port this whens, and then main control device carries out the EDID of Primary port and secondary port
Synthesis, is then output to HDMI equipment, exports corresponding HDMI signals.
Further, the EDID synthesis.Refer to take out the EDID of the video section and EDID of audio-frequency unit, be combined into new
EDID.
Merged by the EDID of HDMI, realize video EDID using master port, audio EDID is not in using secondary port
The problem of equipment sound is incompatible.
The present invention is to realize that EDID merges based on SII9777 chips, realizes that sound draws separated system and method, moreover, base
This scheme is realized in SII9777 chips, and compatibility and stability the meeting higher of HDMI is synthesized, HDMI is detectd automatically using EDID
It surveys, not only increases the intelligent of equipment, also improve the compatibility of equipment.
Description of the drawings
Fig. 1 is the structure diagram that the present invention is realized.
Fig. 2 is the control flow chart that the present invention is realized.
Specific embodiment
In order to more clearly state the present invention, the present invention is further described below in conjunction with the accompanying drawings.
Refering to Figure 1, the hardware block diagram of piece-rate system is drawn for HDMI sounds provided by the invention, shown in figure, entirely
Equipment is largely divided into two pieces：Main control device（SOC）And SII9777.Main control device passes through I2C controls SII9777, and in addition master control is set
The standby reset circuit for needing a GPIO controls SII9777.Mono- road HDMI input ports of SII9777, two-way output port.
Software is run on main control device, uses I2C communicates with SII9777.Start a main thread, be responsible for inside main thread
The message of SII9777 passbacks is received, while is responsible for the post message that processing control command is given inside main thread, this
The realized HDMI sounds of invention draw separation method, and this method includes following minister：
101st, video/audio data are obtained；
102nd, after CPU parses video/audio data, it is output to SII9777；
103rd, SII9777 separates data, obtains Voice and Video data；
104th, SII9777 exports audio ＆ video data by specific port.
The separation is one group of data coming of CPU outputs, is a frame video of char types and the data of audio,
Such as 512 data are video wherein before possibility, rear 512 data are audio.By two buff, by data separating, then incite somebody to action
Two groups of data are sent respectively to two delivery outlets of SII9777.
It in this method, refer to shown in Fig. 2, it is as follows to carry out EDID building-up processes：
201st, input signal is detected；
HDMI Auto-Sensings, when secondary port is not inserted into, EDID uses master port, and video and sound are output to main side
Mouthful, more intelligently.
202nd, judge the type of input signal, be that master port input or secondary port input or two ports have
Input；
203rd, EDID, the EDID are read, the EDID of EDID and secondary port including master port；
204th, EDID synthesis is carried out, if in the case that Primary port and secondary port has input, is then carried out the EDID of the two
Synthesis, generates new EDID；
205th, export EDID and give HDMI equipment, the control of HDMI equipment exports corresponding signal.
It puts it briefly, this method mainly includes HDMI detectings and EDID synthesizes two steps.
When main control device receives HDMI insertions, EDID is read.If support only have master port to enter, just master port
EDID be all given to main control device processing, export corresponding HDMI signals.If secondary port is supported also to have the insertion of HDMI equipment,
Read the EDID of secondary port this whens, main control device exports corresponding HDMI letters HDMI equipment is given to after EDID synthesis
Number.
It is synthesized for EDID, is then the standard of Primary Reference EDID, take out the EDID and audio-frequency unit of video section
EDID is combined into new EDID.The EDID of video section mentioned here can be understood as TV.The EDID of audio-frequency unit
It is interpreted as power amplifier.EDID is being collectively referred to as the information such as video and audio.TV is used for showing video, and power amplifier is used for playing sound.
EDID is synthesized, and is that the audio and video form that TV is supported and audio and video form that power amplifier is supported are merged one
It rises.When master control exports audio-video signal, more audio and video way of outputs can be selected.Than such as whether the audio of 192K is supported to adopt
Sample rate, if support resolution ratio of 4K60P etc..
Merged by the EDID of HDMI, realize video EDID using master port, audio EDID is not in using secondary port
The problem of equipment sound is incompatible.
Therefore, the present invention is to realize that EDID merges based on SII9777 chips, realizes that sound draws separated system, that is, method, and
And this scheme is realized based on SII9777 chips, compatibility and stability the meeting higher of HDMI is synthesized, HDMI is certainly using EDID
Dynamic detecting, not only increases the intelligent of equipment, also improves the compatibility of equipment.
Disclosed above is only several specific embodiments of the present invention, but the present invention is not limited to this, any ability
What the technical staff in domain can think variation should all fall into protection scope of the present invention.
Claims (7)
1. a kind of HDMI sounds draw piece-rate system, it is characterised in that the system includes main control device and SII9777 chips, wherein main
Control equipment passes through I2C connection SII9777 chips, meanwhile, the main control device controls the reset circuit of SII9777 by GPIO；
SII9777 has a HDMI input ports all the way, two-way output port, the two-way output port, all the way exports audio signal, and one
Road exports vision signal.
2. a kind of HDMI sounds draw separation method, it is characterised in that described method includes following steps：
101st, video/audio data are obtained；
102nd, after CPU parses video/audio data, it is output to SII9777；
103rd, SII9777 separates data, obtains Voice and Video data；
104th, SII9777 exports audio ＆ video data.
3. HDMI sounds according to claim 2 draw separation method, it is characterised in that the separation is that CPU outputs come
One group of data, be char types a frame video and audio data, by two buff, by data separating, then by two groups
Data are sent respectively to two delivery outlets of SII9777.
4. HDMI sounds according to claim 2 draw separation method, it is characterised in that HDMI sounds draw separation method, and feature exists
In the method, it is as follows to carry out EDID building-up processes：
201st, input signal is detected；
202nd, judge the type of input signal, be master port input or the input of secondary port or two ports have it is defeated
Enter；
203rd, EDID, the EDID are read, the EDID of EDID and secondary port including master port；
204th, EDID synthesis is carried out, if in the case that Primary port and secondary port has input, is then carried out the EDID of the two
Synthesis, generates new EDID；
205th, export EDID and give HDMI equipment, the control of HDMI equipment exports corresponding signal.
5. HDMI sounds according to claim 4 draw separation method, it is characterised in that in 101 step, HDMI is detectd automatically
It surveys, when secondary port is not inserted into, EDID uses master port, and video and sound are output to master port.
6. HDMI sounds according to claim 5 draw separation method, it is characterised in that the method main control device receives
When HDMI is inserted into, EDID is read；If currently only master port input, is just all given to the EDID of master port at master control
Reason, exports corresponding HDMI signals；If also there is the insertion of HDMI equipment in current pair port, secondary port is read this when
EDID, then main control device the EDID of Primary port and secondary port is synthesized, be then output to HDMI equipment, output is corresponding
HDMI signals.
7. HDMI sounds according to claim 6 draw separation method, it is characterised in that the EDID synthesis refers to take out video
The partial EDID and EDID of audio-frequency unit is combined into new EDID.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711385683.7A CN108055492A (en) | 2017-12-20 | 2017-12-20 | A kind of HDMI sounds draw piece-rate system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711385683.7A CN108055492A (en) | 2017-12-20 | 2017-12-20 | A kind of HDMI sounds draw piece-rate system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108055492A true CN108055492A (en) | 2018-05-18 |
Family
ID=62130870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711385683.7A Pending CN108055492A (en) | 2017-12-20 | 2017-12-20 | A kind of HDMI sounds draw piece-rate system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108055492A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111290320A (en) * | 2020-02-27 | 2020-06-16 | 深圳市深智电科技有限公司 | Switch control system of terminal equipment and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004007389A (en) * | 2002-03-29 | 2004-01-08 | Hitachi Ltd | Audio processing apparatus, audio processing system, audio output apparatus and video display device |
| JP2007243460A (en) * | 2006-03-07 | 2007-09-20 | Kenwood Corp | Relaying apparatus, av reproduction system, and av source apparatus |
| CN101894536A (en) * | 2010-06-26 | 2010-11-24 | 大连捷成实业发展有限公司 | Application method capable of enabling all displays connected to matrix to display normally |
| CN104796626A (en) * | 2015-04-17 | 2015-07-22 | 深圳市东明炬创电子有限公司 | Hybrid matrix dynamic intelligent EDID (extended display identification data) algorithm |
| CN107197189A (en) * | 2017-07-04 | 2017-09-22 | 天津天地伟业信息系统集成有限公司 | A kind of audio frequency and video piece-rate system and method based on HDMI input interfaces |
| CN206575546U (en) * | 2017-03-23 | 2017-10-20 | 深圳市索飞翔科技有限公司 | High resolution audio and video separator |
-
2017
- 2017-12-20 CN CN201711385683.7A patent/CN108055492A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004007389A (en) * | 2002-03-29 | 2004-01-08 | Hitachi Ltd | Audio processing apparatus, audio processing system, audio output apparatus and video display device |
| JP2007243460A (en) * | 2006-03-07 | 2007-09-20 | Kenwood Corp | Relaying apparatus, av reproduction system, and av source apparatus |
| CN101894536A (en) * | 2010-06-26 | 2010-11-24 | 大连捷成实业发展有限公司 | Application method capable of enabling all displays connected to matrix to display normally |
| CN104796626A (en) * | 2015-04-17 | 2015-07-22 | 深圳市东明炬创电子有限公司 | Hybrid matrix dynamic intelligent EDID (extended display identification data) algorithm |
| CN206575546U (en) * | 2017-03-23 | 2017-10-20 | 深圳市索飞翔科技有限公司 | High resolution audio and video separator |
| CN107197189A (en) * | 2017-07-04 | 2017-09-22 | 天津天地伟业信息系统集成有限公司 | A kind of audio frequency and video piece-rate system and method based on HDMI input interfaces |
Non-Patent Citations (1)
| Title |
|---|
| SILICON IMAGE: "《SiI9777 18 Gb/s HDCP 2.2 Transmitter and Port Processor for HDMI 2.0 and MHL 3 Advance Data Sheet》", 30 May 2014 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111290320A (en) * | 2020-02-27 | 2020-06-16 | 深圳市深智电科技有限公司 | Switch control system of terminal equipment and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101727873B (en) | Signal conversion apparatuses and display system | |
| US20100253841A1 (en) | Communication system, transmitter, receiver, communication method, program, and communication cable | |
| KR960036650A (en) | Video Conference Control System Using Integrated Information Communication Network | |
| TW201418987A (en) | Electronic device with thunderbolt interface, connecting method thereof and docking apparatus | |
| CN102932683A (en) | Mobile high-definition link (MHL) realizing method and video playing device | |
| CN201146581Y (en) | Signaling channel detection circuit and television containing the same | |
| CN108055492A (en) | A kind of HDMI sounds draw piece-rate system and method | |
| CN107209378A (en) | Head-mounted display apparatus and wear-type display system | |
| CN202738016U (en) | HDMI (High Definition Multimedia Interface) OTG (On-The-Go) interface circuit | |
| US11343466B2 (en) | Video signal conversion device | |
| WO2010145406A1 (en) | Audio and video interface and method for displaying negotiation between display device and source device | |
| CN206313937U (en) | A kind of extremely clear 4K60HZ audios separators of HDMI | |
| CN202374368U (en) | Conversion device for serial digital interface (SDI) composite audio and video signal | |
| CN112653856B (en) | Method for intelligently switching audio output equipment of laser projection television | |
| CN205545512U (en) | Multichannel audio video collecting card and audio video collecting system | |
| CN101098425A (en) | Method for displaying port of video device or status information of terminal | |
| CN107707829A (en) | A kind of method that multiplex roles intelligence SDI video switching boxs are realized based on FPGA | |
| CN204481958U (en) | Vehicle mounted multimedia control device and system | |
| CN201608797U (en) | Television set | |
| CN202872962U (en) | Video-audio signal transmission system and transmission device thereof | |
| CN111526431A (en) | Equipment for adding captions to video and audio programs in real time | |
| CN201039355Y (en) | Video/audio playing device with high-speed USB interface circuit | |
| CN101277403A (en) | Circuit and method for switching video signal of digital television receiver | |
| CN220067510U (en) | Audio-video interface conversion device and audio-video interface conversion equipment | |
| CN204180207U (en) | CVBS/AUDIO signal Autonomous test multiplex circuit and use the electronic equipment of this circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180518 |